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/wp-includes/ -> class-wp-customize-manager.php (source)

   1  <?php
   2  /**
   3   * WordPress Customize Manager classes
   4   *
   5   * @package WordPress
   6   * @subpackage Customize
   7   * @since 3.4.0
   8   */
   9  
  10  /**
  11   * Customize Manager class.
  12   *
  13   * Bootstraps the Customize experience on the server-side.
  14   *
  15   * Sets up the theme-switching process if a theme other than the active one is
  16   * being previewed and customized.
  17   *
  18   * Serves as a factory for Customize Controls and Settings, and
  19   * instantiates default Customize Controls and Settings.
  20   *
  21   * @since 3.4.0
  22   */
  23  final class WP_Customize_Manager {
  24      /**
  25       * An instance of the theme being previewed.
  26       *
  27       * @since 3.4.0
  28       * @var WP_Theme
  29       */
  30      protected $theme;
  31  
  32      /**
  33       * The directory name of the previously active theme (within the theme_root).
  34       *
  35       * @since 3.4.0
  36       * @var string
  37       */
  38      protected $original_stylesheet;
  39  
  40      /**
  41       * Whether this is a Customizer pageload.
  42       *
  43       * @since 3.4.0
  44       * @var bool
  45       */
  46      protected $previewing = false;
  47  
  48      /**
  49       * Methods and properties dealing with managing widgets in the Customizer.
  50       *
  51       * @since 3.9.0
  52       * @var WP_Customize_Widgets
  53       */
  54      public $widgets;
  55  
  56      /**
  57       * Methods and properties dealing with managing nav menus in the Customizer.
  58       *
  59       * @since 4.3.0
  60       * @var WP_Customize_Nav_Menus
  61       */
  62      public $nav_menus;
  63  
  64      /**
  65       * Methods and properties dealing with selective refresh in the Customizer preview.
  66       *
  67       * @since 4.5.0
  68       * @var WP_Customize_Selective_Refresh
  69       */
  70      public $selective_refresh;
  71  
  72      /**
  73       * Registered instances of WP_Customize_Setting.
  74       *
  75       * @since 3.4.0
  76       * @var array
  77       */
  78      protected $settings = array();
  79  
  80      /**
  81       * Sorted top-level instances of WP_Customize_Panel and WP_Customize_Section.
  82       *
  83       * @since 4.0.0
  84       * @var array
  85       */
  86      protected $containers = array();
  87  
  88      /**
  89       * Registered instances of WP_Customize_Panel.
  90       *
  91       * @since 4.0.0
  92       * @var array
  93       */
  94      protected $panels = array();
  95  
  96      /**
  97       * List of core components.
  98       *
  99       * @since 4.5.0
 100       * @var array
 101       */
 102      protected $components = array( 'widgets', 'nav_menus' );
 103  
 104      /**
 105       * Registered instances of WP_Customize_Section.
 106       *
 107       * @since 3.4.0
 108       * @var array
 109       */
 110      protected $sections = array();
 111  
 112      /**
 113       * Registered instances of WP_Customize_Control.
 114       *
 115       * @since 3.4.0
 116       * @var array
 117       */
 118      protected $controls = array();
 119  
 120      /**
 121       * Panel types that may be rendered from JS templates.
 122       *
 123       * @since 4.3.0
 124       * @var array
 125       */
 126      protected $registered_panel_types = array();
 127  
 128      /**
 129       * Section types that may be rendered from JS templates.
 130       *
 131       * @since 4.3.0
 132       * @var array
 133       */
 134      protected $registered_section_types = array();
 135  
 136      /**
 137       * Control types that may be rendered from JS templates.
 138       *
 139       * @since 4.1.0
 140       * @var array
 141       */
 142      protected $registered_control_types = array();
 143  
 144      /**
 145       * Initial URL being previewed.
 146       *
 147       * @since 4.4.0
 148       * @var string
 149       */
 150      protected $preview_url;
 151  
 152      /**
 153       * URL to link the user to when closing the Customizer.
 154       *
 155       * @since 4.4.0
 156       * @var string
 157       */
 158      protected $return_url;
 159  
 160      /**
 161       * Mapping of 'panel', 'section', 'control' to the ID which should be autofocused.
 162       *
 163       * @since 4.4.0
 164       * @var array
 165       */
 166      protected $autofocus = array();
 167  
 168      /**
 169       * Messenger channel.
 170       *
 171       * @since 4.7.0
 172       * @var string
 173       */
 174      protected $messenger_channel;
 175  
 176      /**
 177       * Whether the autosave revision of the changeset should be loaded.
 178       *
 179       * @since 4.9.0
 180       * @var bool
 181       */
 182      protected $autosaved = false;
 183  
 184      /**
 185       * Whether the changeset branching is allowed.
 186       *
 187       * @since 4.9.0
 188       * @var bool
 189       */
 190      protected $branching = true;
 191  
 192      /**
 193       * Whether settings should be previewed.
 194       *
 195       * @since 4.9.0
 196       * @var bool
 197       */
 198      protected $settings_previewed = true;
 199  
 200      /**
 201       * Whether a starter content changeset was saved.
 202       *
 203       * @since 4.9.0
 204       * @var bool
 205       */
 206      protected $saved_starter_content_changeset = false;
 207  
 208      /**
 209       * Unsanitized values for Customize Settings parsed from $_POST['customized'].
 210       *
 211       * @var array
 212       */
 213      private $_post_values;
 214  
 215      /**
 216       * Changeset UUID.
 217       *
 218       * @since 4.7.0
 219       * @var string
 220       */
 221      private $_changeset_uuid;
 222  
 223      /**
 224       * Changeset post ID.
 225       *
 226       * @since 4.7.0
 227       * @var int|false
 228       */
 229      private $_changeset_post_id;
 230  
 231      /**
 232       * Changeset data loaded from a customize_changeset post.
 233       *
 234       * @since 4.7.0
 235       * @var array|null
 236       */
 237      private $_changeset_data;
 238  
 239      /**
 240       * Constructor.
 241       *
 242       * @since 3.4.0
 243       * @since 4.7.0 Added `$args` parameter.
 244       *
 245       * @param array $args {
 246       *     Args.
 247       *
 248       *     @type null|string|false $changeset_uuid     Changeset UUID, the `post_name` for the customize_changeset post containing the customized state.
 249       *                                                 Defaults to `null` resulting in a UUID to be immediately generated. If `false` is provided, then
 250       *                                                 then the changeset UUID will be determined during `after_setup_theme`: when the
 251       *                                                 `customize_changeset_branching` filter returns false, then the default UUID will be that
 252       *                                                 of the most recent `customize_changeset` post that has a status other than 'auto-draft',
 253       *                                                 'publish', or 'trash'. Otherwise, if changeset branching is enabled, then a random UUID will be used.
 254       *     @type string            $theme              Theme to be previewed (for theme switch). Defaults to customize_theme or theme query params.
 255       *     @type string            $messenger_channel  Messenger channel. Defaults to customize_messenger_channel query param.
 256       *     @type bool              $settings_previewed If settings should be previewed. Defaults to true.
 257       *     @type bool              $branching          If changeset branching is allowed; otherwise, changesets are linear. Defaults to true.
 258       *     @type bool              $autosaved          If data from a changeset's autosaved revision should be loaded if it exists. Defaults to false.
 259       * }
 260       */
 261  	public function __construct( $args = array() ) {
 262  
 263          $args = array_merge(
 264              array_fill_keys( array( 'changeset_uuid', 'theme', 'messenger_channel', 'settings_previewed', 'autosaved', 'branching' ), null ),
 265              $args
 266          );
 267  
 268          // Note that the UUID format will be validated in the setup_theme() method.
 269          if ( ! isset( $args['changeset_uuid'] ) ) {
 270              $args['changeset_uuid'] = wp_generate_uuid4();
 271          }
 272  
 273          // The theme and messenger_channel should be supplied via $args, but they are also looked at in the $_REQUEST global here for back-compat.
 274          if ( ! isset( $args['theme'] ) ) {
 275              if ( isset( $_REQUEST['customize_theme'] ) ) {
 276                  $args['theme'] = wp_unslash( $_REQUEST['customize_theme'] );
 277              } elseif ( isset( $_REQUEST['theme'] ) ) { // Deprecated.
 278                  $args['theme'] = wp_unslash( $_REQUEST['theme'] );
 279              }
 280          }
 281          if ( ! isset( $args['messenger_channel'] ) && isset( $_REQUEST['customize_messenger_channel'] ) ) {
 282              $args['messenger_channel'] = sanitize_key( wp_unslash( $_REQUEST['customize_messenger_channel'] ) );
 283          }
 284  
 285          $this->original_stylesheet = get_stylesheet();
 286          $this->theme               = wp_get_theme( 0 === validate_file( $args['theme'] ) ? $args['theme'] : null );
 287          $this->messenger_channel   = $args['messenger_channel'];
 288          $this->_changeset_uuid     = $args['changeset_uuid'];
 289  
 290          foreach ( array( 'settings_previewed', 'autosaved', 'branching' ) as $key ) {
 291              if ( isset( $args[ $key ] ) ) {
 292                  $this->$key = (bool) $args[ $key ];
 293              }
 294          }
 295  
 296          require_once ( ABSPATH . WPINC . '/class-wp-customize-setting.php' );
 297          require_once ( ABSPATH . WPINC . '/class-wp-customize-panel.php' );
 298          require_once ( ABSPATH . WPINC . '/class-wp-customize-section.php' );
 299          require_once ( ABSPATH . WPINC . '/class-wp-customize-control.php' );
 300  
 301          require_once ( ABSPATH . WPINC . '/customize/class-wp-customize-color-control.php' );
 302          require_once ( ABSPATH . WPINC . '/customize/class-wp-customize-media-control.php' );
 303          require_once ( ABSPATH . WPINC . '/customize/class-wp-customize-upload-control.php' );
 304          require_once ( ABSPATH . WPINC . '/customize/class-wp-customize-image-control.php' );
 305          require_once ( ABSPATH . WPINC . '/customize/class-wp-customize-background-image-control.php' );
 306          require_once ( ABSPATH . WPINC . '/customize/class-wp-customize-background-position-control.php' );
 307          require_once ( ABSPATH . WPINC . '/customize/class-wp-customize-cropped-image-control.php' );
 308          require_once ( ABSPATH . WPINC . '/customize/class-wp-customize-site-icon-control.php' );
 309          require_once ( ABSPATH . WPINC . '/customize/class-wp-customize-header-image-control.php' );
 310          require_once ( ABSPATH . WPINC . '/customize/class-wp-customize-theme-control.php' );
 311          require_once ( ABSPATH . WPINC . '/customize/class-wp-customize-code-editor-control.php' );
 312          require_once ( ABSPATH . WPINC . '/customize/class-wp-widget-area-customize-control.php' );
 313          require_once ( ABSPATH . WPINC . '/customize/class-wp-widget-form-customize-control.php' );
 314          require_once ( ABSPATH . WPINC . '/customize/class-wp-customize-nav-menu-control.php' );
 315          require_once ( ABSPATH . WPINC . '/customize/class-wp-customize-nav-menu-item-control.php' );
 316          require_once ( ABSPATH . WPINC . '/customize/class-wp-customize-nav-menu-location-control.php' );
 317          require_once ( ABSPATH . WPINC . '/customize/class-wp-customize-nav-menu-name-control.php' );
 318          require_once ( ABSPATH . WPINC . '/customize/class-wp-customize-nav-menu-locations-control.php' );
 319          require_once ( ABSPATH . WPINC . '/customize/class-wp-customize-nav-menu-auto-add-control.php' );
 320          require_once ( ABSPATH . WPINC . '/customize/class-wp-customize-new-menu-control.php' ); // @todo Remove in a future release. See #42364.
 321  
 322          require_once ( ABSPATH . WPINC . '/customize/class-wp-customize-nav-menus-panel.php' );
 323  
 324          require_once ( ABSPATH . WPINC . '/customize/class-wp-customize-themes-panel.php' );
 325          require_once ( ABSPATH . WPINC . '/customize/class-wp-customize-themes-section.php' );
 326          require_once ( ABSPATH . WPINC . '/customize/class-wp-customize-sidebar-section.php' );
 327          require_once ( ABSPATH . WPINC . '/customize/class-wp-customize-nav-menu-section.php' );
 328          require_once ( ABSPATH . WPINC . '/customize/class-wp-customize-new-menu-section.php' ); // @todo Remove in a future release. See #42364.
 329  
 330          require_once ( ABSPATH . WPINC . '/customize/class-wp-customize-custom-css-setting.php' );
 331          require_once ( ABSPATH . WPINC . '/customize/class-wp-customize-filter-setting.php' );
 332          require_once ( ABSPATH . WPINC . '/customize/class-wp-customize-header-image-setting.php' );
 333          require_once ( ABSPATH . WPINC . '/customize/class-wp-customize-background-image-setting.php' );
 334          require_once ( ABSPATH . WPINC . '/customize/class-wp-customize-nav-menu-item-setting.php' );
 335          require_once ( ABSPATH . WPINC . '/customize/class-wp-customize-nav-menu-setting.php' );
 336  
 337          /**
 338           * Filters the core Customizer components to load.
 339           *
 340           * This allows Core components to be excluded from being instantiated by
 341           * filtering them out of the array. Note that this filter generally runs
 342           * during the {@see 'plugins_loaded'} action, so it cannot be added
 343           * in a theme.
 344           *
 345           * @since 4.4.0
 346           *
 347           * @see WP_Customize_Manager::__construct()
 348           *
 349           * @param string[]             $components Array of core components to load.
 350           * @param WP_Customize_Manager $this       WP_Customize_Manager instance.
 351           */
 352          $components = apply_filters( 'customize_loaded_components', $this->components, $this );
 353  
 354          require_once ( ABSPATH . WPINC . '/customize/class-wp-customize-selective-refresh.php' );
 355          $this->selective_refresh = new WP_Customize_Selective_Refresh( $this );
 356  
 357          if ( in_array( 'widgets', $components, true ) ) {
 358              require_once ( ABSPATH . WPINC . '/class-wp-customize-widgets.php' );
 359              $this->widgets = new WP_Customize_Widgets( $this );
 360          }
 361  
 362          if ( in_array( 'nav_menus', $components, true ) ) {
 363              require_once ( ABSPATH . WPINC . '/class-wp-customize-nav-menus.php' );
 364              $this->nav_menus = new WP_Customize_Nav_Menus( $this );
 365          }
 366  
 367          add_action( 'setup_theme', array( $this, 'setup_theme' ) );
 368          add_action( 'wp_loaded', array( $this, 'wp_loaded' ) );
 369  
 370          // Do not spawn cron (especially the alternate cron) while running the Customizer.
 371          remove_action( 'init', 'wp_cron' );
 372  
 373          // Do not run update checks when rendering the controls.
 374          remove_action( 'admin_init', '_maybe_update_core' );
 375          remove_action( 'admin_init', '_maybe_update_plugins' );
 376          remove_action( 'admin_init', '_maybe_update_themes' );
 377  
 378          add_action( 'wp_ajax_customize_save', array( $this, 'save' ) );
 379          add_action( 'wp_ajax_customize_trash', array( $this, 'handle_changeset_trash_request' ) );
 380          add_action( 'wp_ajax_customize_refresh_nonces', array( $this, 'refresh_nonces' ) );
 381          add_action( 'wp_ajax_customize_load_themes', array( $this, 'handle_load_themes_request' ) );
 382          add_filter( 'heartbeat_settings', array( $this, 'add_customize_screen_to_heartbeat_settings' ) );
 383          add_filter( 'heartbeat_received', array( $this, 'check_changeset_lock_with_heartbeat' ), 10, 3 );
 384          add_action( 'wp_ajax_customize_override_changeset_lock', array( $this, 'handle_override_changeset_lock_request' ) );
 385          add_action( 'wp_ajax_customize_dismiss_autosave_or_lock', array( $this, 'handle_dismiss_autosave_or_lock_request' ) );
 386  
 387          add_action( 'customize_register', array( $this, 'register_controls' ) );
 388          add_action( 'customize_register', array( $this, 'register_dynamic_settings' ), 11 ); // allow code to create settings first
 389          add_action( 'customize_controls_init', array( $this, 'prepare_controls' ) );
 390          add_action( 'customize_controls_enqueue_scripts', array( $this, 'enqueue_control_scripts' ) );
 391  
 392          // Render Common, Panel, Section, and Control templates.
 393          add_action( 'customize_controls_print_footer_scripts', array( $this, 'render_panel_templates' ), 1 );
 394          add_action( 'customize_controls_print_footer_scripts', array( $this, 'render_section_templates' ), 1 );
 395          add_action( 'customize_controls_print_footer_scripts', array( $this, 'render_control_templates' ), 1 );
 396  
 397          // Export header video settings with the partial response.
 398          add_filter( 'customize_render_partials_response', array( $this, 'export_header_video_settings' ), 10, 3 );
 399  
 400          // Export the settings to JS via the _wpCustomizeSettings variable.
 401          add_action( 'customize_controls_print_footer_scripts', array( $this, 'customize_pane_settings' ), 1000 );
 402  
 403          // Add theme update notices.
 404          if ( current_user_can( 'install_themes' ) || current_user_can( 'update_themes' ) ) {
 405              require_once  ABSPATH . 'wp-admin/includes/update.php';
 406              add_action( 'customize_controls_print_footer_scripts', 'wp_print_admin_notice_templates' );
 407          }
 408      }
 409  
 410      /**
 411       * Return true if it's an Ajax request.
 412       *
 413       * @since 3.4.0
 414       * @since 4.2.0 Added `$action` param.
 415       *
 416       * @param string|null $action Whether the supplied Ajax action is being run.
 417       * @return bool True if it's an Ajax request, false otherwise.
 418       */
 419  	public function doing_ajax( $action = null ) {
 420          if ( ! wp_doing_ajax() ) {
 421              return false;
 422          }
 423  
 424          if ( ! $action ) {
 425              return true;
 426          } else {
 427              /*
 428               * Note: we can't just use doing_action( "wp_ajax_{$action}" ) because we need
 429               * to check before admin-ajax.php gets to that point.
 430               */
 431              return isset( $_REQUEST['action'] ) && wp_unslash( $_REQUEST['action'] ) === $action;
 432          }
 433      }
 434  
 435      /**
 436       * Custom wp_die wrapper. Returns either the standard message for UI
 437       * or the Ajax message.
 438       *
 439       * @since 3.4.0
 440       *
 441       * @param mixed $ajax_message Ajax return
 442       * @param mixed $message UI message
 443       */
 444  	protected function wp_die( $ajax_message, $message = null ) {
 445          if ( $this->doing_ajax() ) {
 446              wp_die( $ajax_message );
 447          }
 448  
 449          if ( ! $message ) {
 450              $message = __( 'Something went wrong.' );
 451          }
 452  
 453          if ( $this->messenger_channel ) {
 454              ob_start();
 455              wp_enqueue_scripts();
 456              wp_print_scripts( array( 'customize-base' ) );
 457  
 458              $settings = array(
 459                  'messengerArgs' => array(
 460                      'channel' => $this->messenger_channel,
 461                      'url'     => wp_customize_url(),
 462                  ),
 463                  'error'         => $ajax_message,
 464              );
 465              ?>
 466              <script>
 467              ( function( api, settings ) {
 468                  var preview = new api.Messenger( settings.messengerArgs );
 469                  preview.send( 'iframe-loading-error', settings.error );
 470              } )( wp.customize, <?php echo wp_json_encode( $settings ); ?> );
 471              </script>
 472              <?php
 473              $message .= ob_get_clean();
 474          }
 475  
 476          wp_die( $message );
 477      }
 478  
 479      /**
 480       * Return the Ajax wp_die() handler if it's a customized request.
 481       *
 482       * @since 3.4.0
 483       * @deprecated 4.7.0
 484       *
 485       * @return callable Die handler.
 486       */
 487  	public function wp_die_handler() {
 488          _deprecated_function( __METHOD__, '4.7.0' );
 489  
 490          if ( $this->doing_ajax() || isset( $_POST['customized'] ) ) {
 491              return '_ajax_wp_die_handler';
 492          }
 493  
 494          return '_default_wp_die_handler';
 495      }
 496  
 497      /**
 498       * Start preview and customize theme.
 499       *
 500       * Check if customize query variable exist. Init filters to filter the current theme.
 501       *
 502       * @since 3.4.0
 503       *
 504       * @global string $pagenow
 505       */
 506  	public function setup_theme() {
 507          global $pagenow;
 508  
 509          // Check permissions for customize.php access since this method is called before customize.php can run any code,
 510          if ( 'customize.php' === $pagenow && ! current_user_can( 'customize' ) ) {
 511              if ( ! is_user_logged_in() ) {
 512                  auth_redirect();
 513              } else {
 514                  wp_die(
 515                      '<h1>' . __( 'You need a higher level of permission.' ) . '</h1>' .
 516                      '<p>' . __( 'Sorry, you are not allowed to customize this site.' ) . '</p>',
 517                      403
 518                  );
 519              }
 520              return;
 521          }
 522  
 523          // If a changeset was provided is invalid.
 524          if ( isset( $this->_changeset_uuid ) && false !== $this->_changeset_uuid && ! wp_is_uuid( $this->_changeset_uuid ) ) {
 525              $this->wp_die( -1, __( 'Invalid changeset UUID' ) );
 526          }
 527  
 528          /*
 529           * Clear incoming post data if the user lacks a CSRF token (nonce). Note that the customizer
 530           * application will inject the customize_preview_nonce query parameter into all Ajax requests.
 531           * For similar behavior elsewhere in WordPress, see rest_cookie_check_errors() which logs out
 532           * a user when a valid nonce isn't present.
 533           */
 534          $has_post_data_nonce = (
 535              check_ajax_referer( 'preview-customize_' . $this->get_stylesheet(), 'nonce', false )
 536              ||
 537              check_ajax_referer( 'save-customize_' . $this->get_stylesheet(), 'nonce', false )
 538              ||
 539              check_ajax_referer( 'preview-customize_' . $this->get_stylesheet(), 'customize_preview_nonce', false )
 540          );
 541          if ( ! current_user_can( 'customize' ) || ! $has_post_data_nonce ) {
 542              unset( $_POST['customized'] );
 543              unset( $_REQUEST['customized'] );
 544          }
 545  
 546          /*
 547           * If unauthenticated then require a valid changeset UUID to load the preview.
 548           * In this way, the UUID serves as a secret key. If the messenger channel is present,
 549           * then send unauthenticated code to prompt re-auth.
 550           */
 551          if ( ! current_user_can( 'customize' ) && ! $this->changeset_post_id() ) {
 552              $this->wp_die( $this->messenger_channel ? 0 : -1, __( 'Non-existent changeset UUID.' ) );
 553          }
 554  
 555          if ( ! headers_sent() ) {
 556              send_origin_headers();
 557          }
 558  
 559          // Hide the admin bar if we're embedded in the customizer iframe.
 560          if ( $this->messenger_channel ) {
 561              show_admin_bar( false );
 562          }
 563  
 564          if ( $this->is_theme_active() ) {
 565              // Once the theme is loaded, we'll validate it.
 566              add_action( 'after_setup_theme', array( $this, 'after_setup_theme' ) );
 567          } else {
 568              // If the requested theme is not the active theme and the user doesn't have the
 569              // switch_themes cap, bail.
 570              if ( ! current_user_can( 'switch_themes' ) ) {
 571                  $this->wp_die( -1, __( 'Sorry, you are not allowed to edit theme options on this site.' ) );
 572              }
 573  
 574              // If the theme has errors while loading, bail.
 575              if ( $this->theme()->errors() ) {
 576                  $this->wp_die( -1, $this->theme()->errors()->get_error_message() );
 577              }
 578  
 579              // If the theme isn't allowed per multisite settings, bail.
 580              if ( ! $this->theme()->is_allowed() ) {
 581                  $this->wp_die( -1, __( 'The requested theme does not exist.' ) );
 582              }
 583          }
 584  
 585          // Make sure changeset UUID is established immediately after the theme is loaded.
 586          add_action( 'after_setup_theme', array( $this, 'establish_loaded_changeset' ), 5 );
 587  
 588          /*
 589           * Import theme starter content for fresh installations when landing in the customizer.
 590           * Import starter content at after_setup_theme:100 so that any
 591           * add_theme_support( 'starter-content' ) calls will have been made.
 592           */
 593          if ( get_option( 'fresh_site' ) && 'customize.php' === $pagenow ) {
 594              add_action( 'after_setup_theme', array( $this, 'import_theme_starter_content' ), 100 );
 595          }
 596  
 597          $this->start_previewing_theme();
 598      }
 599  
 600      /**
 601       * Establish the loaded changeset.
 602       *
 603       * This method runs right at after_setup_theme and applies the 'customize_changeset_branching' filter to determine
 604       * whether concurrent changesets are allowed. Then if the Customizer is not initialized with a `changeset_uuid` param,
 605       * this method will determine which UUID should be used. If changeset branching is disabled, then the most saved
 606       * changeset will be loaded by default. Otherwise, if there are no existing saved changesets or if changeset branching is
 607       * enabled, then a new UUID will be generated.
 608       *
 609       * @since 4.9.0
 610       * @global string $pagenow
 611       */
 612  	public function establish_loaded_changeset() {
 613          global $pagenow;
 614  
 615          if ( empty( $this->_changeset_uuid ) ) {
 616              $changeset_uuid = null;
 617  
 618              if ( ! $this->branching() && $this->is_theme_active() ) {
 619                  $unpublished_changeset_posts = $this->get_changeset_posts(
 620                      array(
 621                          'post_status'               => array_diff( get_post_stati(), array( 'auto-draft', 'publish', 'trash', 'inherit', 'private' ) ),
 622                          'exclude_restore_dismissed' => false,
 623                          'author'                    => 'any',
 624                          'posts_per_page'            => 1,
 625                          'order'                     => 'DESC',
 626                          'orderby'                   => 'date',
 627                      )
 628                  );
 629                  $unpublished_changeset_post  = array_shift( $unpublished_changeset_posts );
 630                  if ( ! empty( $unpublished_changeset_post ) && wp_is_uuid( $unpublished_changeset_post->post_name ) ) {
 631                      $changeset_uuid = $unpublished_changeset_post->post_name;
 632                  }
 633              }
 634  
 635              // If no changeset UUID has been set yet, then generate a new one.
 636              if ( empty( $changeset_uuid ) ) {
 637                  $changeset_uuid = wp_generate_uuid4();
 638              }
 639  
 640              $this->_changeset_uuid = $changeset_uuid;
 641          }
 642  
 643          if ( is_admin() && 'customize.php' === $pagenow ) {
 644              $this->set_changeset_lock( $this->changeset_post_id() );
 645          }
 646      }
 647  
 648      /**
 649       * Callback to validate a theme once it is loaded
 650       *
 651       * @since 3.4.0
 652       */
 653  	public function after_setup_theme() {
 654          $doing_ajax_or_is_customized = ( $this->doing_ajax() || isset( $_POST['customized'] ) );
 655          if ( ! $doing_ajax_or_is_customized && ! validate_current_theme() ) {
 656              wp_redirect( 'themes.php?broken=true' );
 657              exit;
 658          }
 659      }
 660  
 661      /**
 662       * If the theme to be previewed isn't the active theme, add filter callbacks
 663       * to swap it out at runtime.
 664       *
 665       * @since 3.4.0
 666       */
 667  	public function start_previewing_theme() {
 668          // Bail if we're already previewing.
 669          if ( $this->is_preview() ) {
 670              return;
 671          }
 672  
 673          $this->previewing = true;
 674  
 675          if ( ! $this->is_theme_active() ) {
 676              add_filter( 'template', array( $this, 'get_template' ) );
 677              add_filter( 'stylesheet', array( $this, 'get_stylesheet' ) );
 678              add_filter( 'pre_option_current_theme', array( $this, 'current_theme' ) );
 679  
 680              // @link: https://core.trac.wordpress.org/ticket/20027
 681              add_filter( 'pre_option_stylesheet', array( $this, 'get_stylesheet' ) );
 682              add_filter( 'pre_option_template', array( $this, 'get_template' ) );
 683  
 684              // Handle custom theme roots.
 685              add_filter( 'pre_option_stylesheet_root', array( $this, 'get_stylesheet_root' ) );
 686              add_filter( 'pre_option_template_root', array( $this, 'get_template_root' ) );
 687          }
 688  
 689          /**
 690           * Fires once the Customizer theme preview has started.
 691           *
 692           * @since 3.4.0
 693           *
 694           * @param WP_Customize_Manager $this WP_Customize_Manager instance.
 695           */
 696          do_action( 'start_previewing_theme', $this );
 697      }
 698  
 699      /**
 700       * Stop previewing the selected theme.
 701       *
 702       * Removes filters to change the current theme.
 703       *
 704       * @since 3.4.0
 705       */
 706  	public function stop_previewing_theme() {
 707          if ( ! $this->is_preview() ) {
 708              return;
 709          }
 710  
 711          $this->previewing = false;
 712  
 713          if ( ! $this->is_theme_active() ) {
 714              remove_filter( 'template', array( $this, 'get_template' ) );
 715              remove_filter( 'stylesheet', array( $this, 'get_stylesheet' ) );
 716              remove_filter( 'pre_option_current_theme', array( $this, 'current_theme' ) );
 717  
 718              // @link: https://core.trac.wordpress.org/ticket/20027
 719              remove_filter( 'pre_option_stylesheet', array( $this, 'get_stylesheet' ) );
 720              remove_filter( 'pre_option_template', array( $this, 'get_template' ) );
 721  
 722              // Handle custom theme roots.
 723              remove_filter( 'pre_option_stylesheet_root', array( $this, 'get_stylesheet_root' ) );
 724              remove_filter( 'pre_option_template_root', array( $this, 'get_template_root' ) );
 725          }
 726  
 727          /**
 728           * Fires once the Customizer theme preview has stopped.
 729           *
 730           * @since 3.4.0
 731           *
 732           * @param WP_Customize_Manager $this WP_Customize_Manager instance.
 733           */
 734          do_action( 'stop_previewing_theme', $this );
 735      }
 736  
 737      /**
 738       * Gets whether settings are or will be previewed.
 739       *
 740       * @since 4.9.0
 741       * @see WP_Customize_Setting::preview()
 742       *
 743       * @return bool
 744       */
 745  	public function settings_previewed() {
 746          return $this->settings_previewed;
 747      }
 748  
 749      /**
 750       * Gets whether data from a changeset's autosaved revision should be loaded if it exists.
 751       *
 752       * @since 4.9.0
 753       * @see WP_Customize_Manager::changeset_data()
 754       *
 755       * @return bool Is using autosaved changeset revision.
 756       */
 757  	public function autosaved() {
 758          return $this->autosaved;
 759      }
 760  
 761      /**
 762       * Whether the changeset branching is allowed.
 763       *
 764       * @since 4.9.0
 765       * @see WP_Customize_Manager::establish_loaded_changeset()
 766       *
 767       * @return bool Is changeset branching.
 768       */
 769  	public function branching() {
 770  
 771          /**
 772           * Filters whether or not changeset branching is allowed.
 773           *
 774           * By default in core, when changeset branching is not allowed, changesets will operate
 775           * linearly in that only one saved changeset will exist at a time (with a 'draft' or
 776           * 'future' status). This makes the Customizer operate in a way that is similar to going to
 777           * "edit" to one existing post: all users will be making changes to the same post, and autosave
 778           * revisions will be made for that post.
 779           *
 780           * By contrast, when changeset branching is allowed, then the model is like users going
 781           * to "add new" for a page and each user makes changes independently of each other since
 782           * they are all operating on their own separate pages, each getting their own separate
 783           * initial auto-drafts and then once initially saved, autosave revisions on top of that
 784           * user's specific post.
 785           *
 786           * Since linear changesets are deemed to be more suitable for the majority of WordPress users,
 787           * they are the default. For WordPress sites that have heavy site management in the Customizer
 788           * by multiple users then branching changesets should be enabled by means of this filter.
 789           *
 790           * @since 4.9.0
 791           *
 792           * @param bool                 $allow_branching Whether branching is allowed. If `false`, the default,
 793           *                                              then only one saved changeset exists at a time.
 794           * @param WP_Customize_Manager $wp_customize    Manager instance.
 795           */
 796          $this->branching = apply_filters( 'customize_changeset_branching', $this->branching, $this );
 797  
 798          return $this->branching;
 799      }
 800  
 801      /**
 802       * Get the changeset UUID.
 803       *
 804       * @since 4.7.0
 805       * @see WP_Customize_Manager::establish_loaded_changeset()
 806       *
 807       * @return string UUID.
 808       */
 809  	public function changeset_uuid() {
 810          if ( empty( $this->_changeset_uuid ) ) {
 811              $this->establish_loaded_changeset();
 812          }
 813          return $this->_changeset_uuid;
 814      }
 815  
 816      /**
 817       * Get the theme being customized.
 818       *
 819       * @since 3.4.0
 820       *
 821       * @return WP_Theme
 822       */
 823  	public function theme() {
 824          if ( ! $this->theme ) {
 825              $this->theme = wp_get_theme();
 826          }
 827          return $this->theme;
 828      }
 829  
 830      /**
 831       * Get the registered settings.
 832       *
 833       * @since 3.4.0
 834       *
 835       * @return array
 836       */
 837  	public function settings() {
 838          return $this->settings;
 839      }
 840  
 841      /**
 842       * Get the registered controls.
 843       *
 844       * @since 3.4.0
 845       *
 846       * @return array
 847       */
 848  	public function controls() {
 849          return $this->controls;
 850      }
 851  
 852      /**
 853       * Get the registered containers.
 854       *
 855       * @since 4.0.0
 856       *
 857       * @return array
 858       */
 859  	public function containers() {
 860          return $this->containers;
 861      }
 862  
 863      /**
 864       * Get the registered sections.
 865       *
 866       * @since 3.4.0
 867       *
 868       * @return array
 869       */
 870  	public function sections() {
 871          return $this->sections;
 872      }
 873  
 874      /**
 875       * Get the registered panels.
 876       *
 877       * @since 4.0.0
 878       *
 879       * @return array Panels.
 880       */
 881  	public function panels() {
 882          return $this->panels;
 883      }
 884  
 885      /**
 886       * Checks if the current theme is active.
 887       *
 888       * @since 3.4.0
 889       *
 890       * @return bool
 891       */
 892  	public function is_theme_active() {
 893          return $this->get_stylesheet() == $this->original_stylesheet;
 894      }
 895  
 896      /**
 897       * Register styles/scripts and initialize the preview of each setting
 898       *
 899       * @since 3.4.0
 900       */
 901  	public function wp_loaded() {
 902  
 903          // Unconditionally register core types for panels, sections, and controls in case plugin unhooks all customize_register actions.
 904          $this->register_panel_type( 'WP_Customize_Panel' );
 905          $this->register_panel_type( 'WP_Customize_Themes_Panel' );
 906          $this->register_section_type( 'WP_Customize_Section' );
 907          $this->register_section_type( 'WP_Customize_Sidebar_Section' );
 908          $this->register_section_type( 'WP_Customize_Themes_Section' );
 909          $this->register_control_type( 'WP_Customize_Color_Control' );
 910          $this->register_control_type( 'WP_Customize_Media_Control' );
 911          $this->register_control_type( 'WP_Customize_Upload_Control' );
 912          $this->register_control_type( 'WP_Customize_Image_Control' );
 913          $this->register_control_type( 'WP_Customize_Background_Image_Control' );
 914          $this->register_control_type( 'WP_Customize_Background_Position_Control' );
 915          $this->register_control_type( 'WP_Customize_Cropped_Image_Control' );
 916          $this->register_control_type( 'WP_Customize_Site_Icon_Control' );
 917          $this->register_control_type( 'WP_Customize_Theme_Control' );
 918          $this->register_control_type( 'WP_Customize_Code_Editor_Control' );
 919          $this->register_control_type( 'WP_Customize_Date_Time_Control' );
 920  
 921          /**
 922           * Fires once WordPress has loaded, allowing scripts and styles to be initialized.
 923           *
 924           * @since 3.4.0
 925           *
 926           * @param WP_Customize_Manager $this WP_Customize_Manager instance.
 927           */
 928          do_action( 'customize_register', $this );
 929  
 930          if ( $this->settings_previewed() ) {
 931              foreach ( $this->settings as $setting ) {
 932                  $setting->preview();
 933              }
 934          }
 935  
 936          if ( $this->is_preview() && ! is_admin() ) {
 937              $this->customize_preview_init();
 938          }
 939      }
 940  
 941      /**
 942       * Prevents Ajax requests from following redirects when previewing a theme
 943       * by issuing a 200 response instead of a 30x.
 944       *
 945       * Instead, the JS will sniff out the location header.
 946       *
 947       * @since 3.4.0
 948       * @deprecated 4.7.0
 949       *
 950       * @param int $status Status.
 951       * @return int
 952       */
 953  	public function wp_redirect_status( $status ) {
 954          _deprecated_function( __FUNCTION__, '4.7.0' );
 955  
 956          if ( $this->is_preview() && ! is_admin() ) {
 957              return 200;
 958          }
 959  
 960          return $status;
 961      }
 962  
 963      /**
 964       * Find the changeset post ID for a given changeset UUID.
 965       *
 966       * @since 4.7.0
 967       *
 968       * @param string $uuid Changeset UUID.
 969       * @return int|null Returns post ID on success and null on failure.
 970       */
 971  	public function find_changeset_post_id( $uuid ) {
 972          $cache_group       = 'customize_changeset_post';
 973          $changeset_post_id = wp_cache_get( $uuid, $cache_group );
 974          if ( $changeset_post_id && 'customize_changeset' === get_post_type( $changeset_post_id ) ) {
 975              return $changeset_post_id;
 976          }
 977  
 978          $changeset_post_query = new WP_Query(
 979              array(
 980                  'post_type'              => 'customize_changeset',
 981                  'post_status'            => get_post_stati(),
 982                  'name'                   => $uuid,
 983                  'posts_per_page'         => 1,
 984                  'no_found_rows'          => true,
 985                  'cache_results'          => true,
 986                  'update_post_meta_cache' => false,
 987                  'update_post_term_cache' => false,
 988                  'lazy_load_term_meta'    => false,
 989              )
 990          );
 991          if ( ! empty( $changeset_post_query->posts ) ) {
 992              // Note: 'fields'=>'ids' is not being used in order to cache the post object as it will be needed.
 993              $changeset_post_id = $changeset_post_query->posts[0]->ID;
 994              wp_cache_set( $uuid, $changeset_post_id, $cache_group );
 995              return $changeset_post_id;
 996          }
 997  
 998          return null;
 999      }
1000  
1001      /**
1002       * Get changeset posts.
1003       *
1004       * @since 4.9.0
1005       *
1006       * @param array $args {
1007       *     Args to pass into `get_posts()` to query changesets.
1008       *
1009       *     @type int    $posts_per_page             Number of posts to return. Defaults to -1 (all posts).
1010       *     @type int    $author                     Post author. Defaults to current user.
1011       *     @type string $post_status                Status of changeset. Defaults to 'auto-draft'.
1012       *     @type bool   $exclude_restore_dismissed  Whether to exclude changeset auto-drafts that have been dismissed. Defaults to true.
1013       * }
1014       * @return WP_Post[] Auto-draft changesets.
1015       */
1016  	protected function get_changeset_posts( $args = array() ) {
1017          $default_args = array(
1018              'exclude_restore_dismissed' => true,
1019              'posts_per_page'            => -1,
1020              'post_type'                 => 'customize_changeset',
1021              'post_status'               => 'auto-draft',
1022              'order'                     => 'DESC',
1023              'orderby'                   => 'date',
1024              'no_found_rows'             => true,
1025              'cache_results'             => true,
1026              'update_post_meta_cache'    => false,
1027              'update_post_term_cache'    => false,
1028              'lazy_load_term_meta'       => false,
1029          );
1030          if ( get_current_user_id() ) {
1031              $default_args['author'] = get_current_user_id();
1032          }
1033          $args = array_merge( $default_args, $args );
1034  
1035          if ( ! empty( $args['exclude_restore_dismissed'] ) ) {
1036              unset( $args['exclude_restore_dismissed'] );
1037              $args['meta_query'] = array(
1038                  array(
1039                      'key'     => '_customize_restore_dismissed',
1040                      'compare' => 'NOT EXISTS',
1041                  ),
1042              );
1043          }
1044  
1045          return get_posts( $args );
1046      }
1047  
1048      /**
1049       * Dismiss all of the current user's auto-drafts (other than the present one).
1050       *
1051       * @since 4.9.0
1052       * @return int The number of auto-drafts that were dismissed.
1053       */
1054  	protected function dismiss_user_auto_draft_changesets() {
1055          $changeset_autodraft_posts = $this->get_changeset_posts(
1056              array(
1057                  'post_status'               => 'auto-draft',
1058                  'exclude_restore_dismissed' => true,
1059                  'posts_per_page'            => -1,
1060              )
1061          );
1062          $dismissed                 = 0;
1063          foreach ( $changeset_autodraft_posts as $autosave_autodraft_post ) {
1064              if ( $autosave_autodraft_post->ID === $this->changeset_post_id() ) {
1065                  continue;
1066              }
1067              if ( update_post_meta( $autosave_autodraft_post->ID, '_customize_restore_dismissed', true ) ) {
1068                  $dismissed++;
1069              }
1070          }
1071          return $dismissed;
1072      }
1073  
1074      /**
1075       * Get the changeset post id for the loaded changeset.
1076       *
1077       * @since 4.7.0
1078       *
1079       * @return int|null Post ID on success or null if there is no post yet saved.
1080       */
1081  	public function changeset_post_id() {
1082          if ( ! isset( $this->_changeset_post_id ) ) {
1083              $post_id = $this->find_changeset_post_id( $this->changeset_uuid() );
1084              if ( ! $post_id ) {
1085                  $post_id = false;
1086              }
1087              $this->_changeset_post_id = $post_id;
1088          }
1089          if ( false === $this->_changeset_post_id ) {
1090              return null;
1091          }
1092          return $this->_changeset_post_id;
1093      }
1094  
1095      /**
1096       * Get the data stored in a changeset post.
1097       *
1098       * @since 4.7.0
1099       *
1100       * @param int $post_id Changeset post ID.
1101       * @return array|WP_Error Changeset data or WP_Error on error.
1102       */
1103  	protected function get_changeset_post_data( $post_id ) {
1104          if ( ! $post_id ) {
1105              return new WP_Error( 'empty_post_id' );
1106          }
1107          $changeset_post = get_post( $post_id );
1108          if ( ! $changeset_post ) {
1109              return new WP_Error( 'missing_post' );
1110          }
1111          if ( 'revision' === $changeset_post->post_type ) {
1112              if ( 'customize_changeset' !== get_post_type( $changeset_post->post_parent ) ) {
1113                  return new WP_Error( 'wrong_post_type' );
1114              }
1115          } elseif ( 'customize_changeset' !== $changeset_post->post_type ) {
1116              return new WP_Error( 'wrong_post_type' );
1117          }
1118          $changeset_data = json_decode( $changeset_post->post_content, true );
1119          $last_error     = json_last_error();
1120          if ( $last_error ) {
1121              return new WP_Error( 'json_parse_error', '', $last_error );
1122          }
1123          if ( ! is_array( $changeset_data ) ) {
1124              return new WP_Error( 'expected_array' );
1125          }
1126          return $changeset_data;
1127      }
1128  
1129      /**
1130       * Get changeset data.
1131       *
1132       * @since 4.7.0
1133       * @since 4.9.0 This will return the changeset's data with a user's autosave revision merged on top, if one exists and $autosaved is true.
1134       *
1135       * @return array Changeset data.
1136       */
1137  	public function changeset_data() {
1138          if ( isset( $this->_changeset_data ) ) {
1139              return $this->_changeset_data;
1140          }
1141          $changeset_post_id = $this->changeset_post_id();
1142          if ( ! $changeset_post_id ) {
1143              $this->_changeset_data = array();
1144          } else {
1145              if ( $this->autosaved() && is_user_logged_in() ) {
1146                  $autosave_post = wp_get_post_autosave( $changeset_post_id, get_current_user_id() );
1147                  if ( $autosave_post ) {
1148                      $data = $this->get_changeset_post_data( $autosave_post->ID );
1149                      if ( ! is_wp_error( $data ) ) {
1150                          $this->_changeset_data = $data;
1151                      }
1152                  }
1153              }
1154  
1155              // Load data from the changeset if it was not loaded from an autosave.
1156              if ( ! isset( $this->_changeset_data ) ) {
1157                  $data = $this->get_changeset_post_data( $changeset_post_id );
1158                  if ( ! is_wp_error( $data ) ) {
1159                      $this->_changeset_data = $data;
1160                  } else {
1161                      $this->_changeset_data = array();
1162                  }
1163              }
1164          }
1165          return $this->_changeset_data;
1166      }
1167  
1168      /**
1169       * Starter content setting IDs.
1170       *
1171       * @since 4.7.0
1172       * @var array
1173       */
1174      protected $pending_starter_content_settings_ids = array();
1175  
1176      /**
1177       * Import theme starter content into the customized state.
1178       *
1179       * @since 4.7.0
1180       *
1181       * @param array $starter_content Starter content. Defaults to `get_theme_starter_content()`.
1182       */
1183  	function import_theme_starter_content( $starter_content = array() ) {
1184          if ( empty( $starter_content ) ) {
1185              $starter_content = get_theme_starter_content();
1186          }
1187  
1188          $changeset_data = array();
1189          if ( $this->changeset_post_id() ) {
1190              /*
1191               * Don't re-import starter content into a changeset saved persistently.
1192               * This will need to be revisited in the future once theme switching
1193               * is allowed with drafted/scheduled changesets, since switching to
1194               * another theme could result in more starter content being applied.
1195               * However, when doing an explicit save it is currently possible for
1196               * nav menus and nav menu items specifically to lose their starter_content
1197               * flags, thus resulting in duplicates being created since they fail
1198               * to get re-used. See #40146.
1199               */
1200              if ( 'auto-draft' !== get_post_status( $this->changeset_post_id() ) ) {
1201                  return;
1202              }
1203  
1204              $changeset_data = $this->get_changeset_post_data( $this->changeset_post_id() );
1205          }
1206  
1207          $sidebars_widgets = isset( $starter_content['widgets'] ) && ! empty( $this->widgets ) ? $starter_content['widgets'] : array();
1208          $attachments      = isset( $starter_content['attachments'] ) && ! empty( $this->nav_menus ) ? $starter_content['attachments'] : array();
1209          $posts            = isset( $starter_content['posts'] ) && ! empty( $this->nav_menus ) ? $starter_content['posts'] : array();
1210          $options          = isset( $starter_content['options'] ) ? $starter_content['options'] : array();
1211          $nav_menus        = isset( $starter_content['nav_menus'] ) && ! empty( $this->nav_menus ) ? $starter_content['nav_menus'] : array();
1212          $theme_mods       = isset( $starter_content['theme_mods'] ) ? $starter_content['theme_mods'] : array();
1213  
1214          // Widgets.
1215          $max_widget_numbers = array();
1216          foreach ( $sidebars_widgets as $sidebar_id => $widgets ) {
1217              $sidebar_widget_ids = array();
1218              foreach ( $widgets as $widget ) {
1219                  list( $id_base, $instance ) = $widget;
1220  
1221                  if ( ! isset( $max_widget_numbers[ $id_base ] ) ) {
1222  
1223                      // When $settings is an array-like object, get an intrinsic array for use with array_keys().
1224                      $settings = get_option( "widget_{$id_base}", array() );
1225                      if ( $settings instanceof ArrayObject || $settings instanceof ArrayIterator ) {
1226                          $settings = $settings->getArrayCopy();
1227                      }
1228  
1229                      // Find the max widget number for this type.
1230                      $widget_numbers = array_keys( $settings );
1231                      if ( count( $widget_numbers ) > 0 ) {
1232                          $widget_numbers[]               = 1;
1233                          $max_widget_numbers[ $id_base ] = max( ...$widget_numbers );
1234                      } else {
1235                          $max_widget_numbers[ $id_base ] = 1;
1236                      }
1237                  }
1238                  $max_widget_numbers[ $id_base ] += 1;
1239  
1240                  $widget_id  = sprintf( '%s-%d', $id_base, $max_widget_numbers[ $id_base ] );
1241                  $setting_id = sprintf( 'widget_%s[%d]', $id_base, $max_widget_numbers[ $id_base ] );
1242  
1243                  $setting_value = $this->widgets->sanitize_widget_js_instance( $instance );
1244                  if ( empty( $changeset_data[ $setting_id ] ) || ! empty( $changeset_data[ $setting_id ]['starter_content'] ) ) {
1245                      $this->set_post_value( $setting_id, $setting_value );
1246                      $this->pending_starter_content_settings_ids[] = $setting_id;
1247                  }
1248                  $sidebar_widget_ids[] = $widget_id;
1249              }
1250  
1251              $setting_id = sprintf( 'sidebars_widgets[%s]', $sidebar_id );
1252              if ( empty( $changeset_data[ $setting_id ] ) || ! empty( $changeset_data[ $setting_id ]['starter_content'] ) ) {
1253                  $this->set_post_value( $setting_id, $sidebar_widget_ids );
1254                  $this->pending_starter_content_settings_ids[] = $setting_id;
1255              }
1256          }
1257  
1258          $starter_content_auto_draft_post_ids = array();
1259          if ( ! empty( $changeset_data['nav_menus_created_posts']['value'] ) ) {
1260              $starter_content_auto_draft_post_ids = array_merge( $starter_content_auto_draft_post_ids, $changeset_data['nav_menus_created_posts']['value'] );
1261          }
1262  
1263          // Make an index of all the posts needed and what their slugs are.
1264          $needed_posts = array();
1265          $attachments  = $this->prepare_starter_content_attachments( $attachments );
1266          foreach ( $attachments as $attachment ) {
1267              $key                  = 'attachment:' . $attachment['post_name'];
1268              $needed_posts[ $key ] = true;
1269          }
1270          foreach ( array_keys( $posts ) as $post_symbol ) {
1271              if ( empty( $posts[ $post_symbol ]['post_name'] ) && empty( $posts[ $post_symbol ]['post_title'] ) ) {
1272                  unset( $posts[ $post_symbol ] );
1273                  continue;
1274              }
1275              if ( empty( $posts[ $post_symbol ]['post_name'] ) ) {
1276                  $posts[ $post_symbol ]['post_name'] = sanitize_title( $posts[ $post_symbol ]['post_title'] );
1277              }
1278              if ( empty( $posts[ $post_symbol ]['post_type'] ) ) {
1279                  $posts[ $post_symbol ]['post_type'] = 'post';
1280              }
1281              $needed_posts[ $posts[ $post_symbol ]['post_type'] . ':' . $posts[ $post_symbol ]['post_name'] ] = true;
1282          }
1283          $all_post_slugs = array_merge(
1284              wp_list_pluck( $attachments, 'post_name' ),
1285              wp_list_pluck( $posts, 'post_name' )
1286          );
1287  
1288          /*
1289           * Obtain all post types referenced in starter content to use in query.
1290           * This is needed because 'any' will not account for post types not yet registered.
1291           */
1292          $post_types = array_filter( array_merge( array( 'attachment' ), wp_list_pluck( $posts, 'post_type' ) ) );
1293  
1294          // Re-use auto-draft starter content posts referenced in the current customized state.
1295          $existing_starter_content_posts = array();
1296          if ( ! empty( $starter_content_auto_draft_post_ids ) ) {
1297              $existing_posts_query = new WP_Query(
1298                  array(
1299                      'post__in'       => $starter_content_auto_draft_post_ids,
1300                      'post_status'    => 'auto-draft',
1301                      'post_type'      => $post_types,
1302                      'posts_per_page' => -1,
1303                  )
1304              );
1305              foreach ( $existing_posts_query->posts as $existing_post ) {
1306                  $post_name = $existing_post->post_name;
1307                  if ( empty( $post_name ) ) {
1308                      $post_name = get_post_meta( $existing_post->ID, '_customize_draft_post_name', true );
1309                  }
1310                  $existing_starter_content_posts[ $existing_post->post_type . ':' . $post_name ] = $existing_post;
1311              }
1312          }
1313  
1314          // Re-use non-auto-draft posts.
1315          if ( ! empty( $all_post_slugs ) ) {
1316              $existing_posts_query = new WP_Query(
1317                  array(
1318                      'post_name__in'  => $all_post_slugs,
1319                      'post_status'    => array_diff( get_post_stati(), array( 'auto-draft' ) ),
1320                      'post_type'      => 'any',
1321                      'posts_per_page' => -1,
1322                  )
1323              );
1324              foreach ( $existing_posts_query->posts as $existing_post ) {
1325                  $key = $existing_post->post_type . ':' . $existing_post->post_name;
1326                  if ( isset( $needed_posts[ $key ] ) && ! isset( $existing_starter_content_posts[ $key ] ) ) {
1327                      $existing_starter_content_posts[ $key ] = $existing_post;
1328                  }
1329              }
1330          }
1331  
1332          // Attachments are technically posts but handled differently.
1333          if ( ! empty( $attachments ) ) {
1334  
1335              $attachment_ids = array();
1336  
1337              foreach ( $attachments as $symbol => $attachment ) {
1338                  $file_array    = array(
1339                      'name' => $attachment['file_name'],
1340                  );
1341                  $file_path     = $attachment['file_path'];
1342                  $attachment_id = null;
1343                  $attached_file = null;
1344                  if ( isset( $existing_starter_content_posts[ 'attachment:' . $attachment['post_name'] ] ) ) {
1345                      $attachment_post = $existing_starter_content_posts[ 'attachment:' . $attachment['post_name'] ];
1346                      $attachment_id   = $attachment_post->ID;
1347                      $attached_file   = get_attached_file( $attachment_id );
1348                      if ( empty( $attached_file ) || ! file_exists( $attached_file ) ) {
1349                          $attachment_id = null;
1350                          $attached_file = null;
1351                      } elseif ( $this->get_stylesheet() !== get_post_meta( $attachment_post->ID, '_starter_content_theme', true ) ) {
1352  
1353                          // Re-generate attachment metadata since it was previously generated for a different theme.
1354                          $metadata = wp_generate_attachment_metadata( $attachment_post->ID, $attached_file );
1355                          wp_update_attachment_metadata( $attachment_id, $metadata );
1356                          update_post_meta( $attachment_id, '_starter_content_theme', $this->get_stylesheet() );
1357                      }
1358                  }
1359  
1360                  // Insert the attachment auto-draft because it doesn't yet exist or the attached file is gone.
1361                  if ( ! $attachment_id ) {
1362  
1363                      // Copy file to temp location so that original file won't get deleted from theme after sideloading.
1364                      $temp_file_name = wp_tempnam( wp_basename( $file_path ) );
1365                      if ( $temp_file_name && copy( $file_path, $temp_file_name ) ) {
1366                          $file_array['tmp_name'] = $temp_file_name;
1367                      }
1368                      if ( empty( $file_array['tmp_name'] ) ) {
1369                          continue;
1370                      }
1371  
1372                      $attachment_post_data = array_merge(
1373                          wp_array_slice_assoc( $attachment, array( 'post_title', 'post_content', 'post_excerpt' ) ),
1374                          array(
1375                              'post_status' => 'auto-draft', // So attachment will be garbage collected in a week if changeset is never published.
1376                          )
1377                      );
1378  
1379                      $attachment_id = media_handle_sideload( $file_array, 0, null, $attachment_post_data );
1380                      if ( is_wp_error( $attachment_id ) ) {
1381                          continue;
1382                      }
1383                      update_post_meta( $attachment_id, '_starter_content_theme', $this->get_stylesheet() );
1384                      update_post_meta( $attachment_id, '_customize_draft_post_name', $attachment['post_name'] );
1385                  }
1386  
1387                  $attachment_ids[ $symbol ] = $attachment_id;
1388              }
1389              $starter_content_auto_draft_post_ids = array_merge( $starter_content_auto_draft_post_ids, array_values( $attachment_ids ) );
1390          }
1391  
1392          // Posts & pages.
1393          if ( ! empty( $posts ) ) {
1394              foreach ( array_keys( $posts ) as $post_symbol ) {
1395                  if ( empty( $posts[ $post_symbol ]['post_type'] ) || empty( $posts[ $post_symbol ]['post_name'] ) ) {
1396                      continue;
1397                  }
1398                  $post_type = $posts[ $post_symbol ]['post_type'];
1399                  if ( ! empty( $posts[ $post_symbol ]['post_name'] ) ) {
1400                      $post_name = $posts[ $post_symbol ]['post_name'];
1401                  } elseif ( ! empty( $posts[ $post_symbol ]['post_title'] ) ) {
1402                      $post_name = sanitize_title( $posts[ $post_symbol ]['post_title'] );
1403                  } else {
1404                      continue;
1405                  }
1406  
1407                  // Use existing auto-draft post if one already exists with the same type and name.
1408                  if ( isset( $existing_starter_content_posts[ $post_type . ':' . $post_name ] ) ) {
1409                      $posts[ $post_symbol ]['ID'] = $existing_starter_content_posts[ $post_type . ':' . $post_name ]->ID;
1410                      continue;
1411                  }
1412  
1413                  // Translate the featured image symbol.
1414                  if ( ! empty( $posts[ $post_symbol ]['thumbnail'] )
1415                      && preg_match( '/^{{(?P<symbol>.+)}}$/', $posts[ $post_symbol ]['thumbnail'], $matches )
1416                      && isset( $attachment_ids[ $matches['symbol'] ] ) ) {
1417                      $posts[ $post_symbol ]['meta_input']['_thumbnail_id'] = $attachment_ids[ $matches['symbol'] ];
1418                  }
1419  
1420                  if ( ! empty( $posts[ $post_symbol ]['template'] ) ) {
1421                      $posts[ $post_symbol ]['meta_input']['_wp_page_template'] = $posts[ $post_symbol ]['template'];
1422                  }
1423  
1424                  $r = $this->nav_menus->insert_auto_draft_post( $posts[ $post_symbol ] );
1425                  if ( $r instanceof WP_Post ) {
1426                      $posts[ $post_symbol ]['ID'] = $r->ID;
1427                  }
1428              }
1429  
1430              $starter_content_auto_draft_post_ids = array_merge( $starter_content_auto_draft_post_ids, wp_list_pluck( $posts, 'ID' ) );
1431          }
1432  
1433          // The nav_menus_created_posts setting is why nav_menus component is dependency for adding posts.
1434          if ( ! empty( $this->nav_menus ) && ! empty( $starter_content_auto_draft_post_ids ) ) {
1435              $setting_id = 'nav_menus_created_posts';
1436              $this->set_post_value( $setting_id, array_unique( array_values( $starter_content_auto_draft_post_ids ) ) );
1437              $this->pending_starter_content_settings_ids[] = $setting_id;
1438          }
1439  
1440          // Nav menus.
1441          $placeholder_id              = -1;
1442          $reused_nav_menu_setting_ids = array();
1443          foreach ( $nav_menus as $nav_menu_location => $nav_menu ) {
1444  
1445              $nav_menu_term_id    = null;
1446              $nav_menu_setting_id = null;
1447              $matches             = array();
1448  
1449              // Look for an existing placeholder menu with starter content to re-use.
1450              foreach ( $changeset_data as $setting_id => $setting_params ) {
1451                  $can_reuse = (
1452                      ! empty( $setting_params['starter_content'] )
1453                      &&
1454                      ! in_array( $setting_id, $reused_nav_menu_setting_ids, true )
1455                      &&
1456                      preg_match( '#^nav_menu\[(?P<nav_menu_id>-?\d+)\]$#', $setting_id, $matches )
1457                  );
1458                  if ( $can_reuse ) {
1459                      $nav_menu_term_id              = intval( $matches['nav_menu_id'] );
1460                      $nav_menu_setting_id           = $setting_id;
1461                      $reused_nav_menu_setting_ids[] = $setting_id;
1462                      break;
1463                  }
1464              }
1465  
1466              if ( ! $nav_menu_term_id ) {
1467                  while ( isset( $changeset_data[ sprintf( 'nav_menu[%d]', $placeholder_id ) ] ) ) {
1468                      $placeholder_id--;
1469                  }
1470                  $nav_menu_term_id    = $placeholder_id;
1471                  $nav_menu_setting_id = sprintf( 'nav_menu[%d]', $placeholder_id );
1472              }
1473  
1474              $this->set_post_value(
1475                  $nav_menu_setting_id,
1476                  array(
1477                      'name' => isset( $nav_menu['name'] ) ? $nav_menu['name'] : $nav_menu_location,
1478                  )
1479              );
1480              $this->pending_starter_content_settings_ids[] = $nav_menu_setting_id;
1481  
1482              // @todo Add support for menu_item_parent.
1483              $position = 0;
1484              foreach ( $nav_menu['items'] as $nav_menu_item ) {
1485                  $nav_menu_item_setting_id = sprintf( 'nav_menu_item[%d]', $placeholder_id-- );
1486                  if ( ! isset( $nav_menu_item['position'] ) ) {
1487                      $nav_menu_item['position'] = $position++;
1488                  }
1489                  $nav_menu_item['nav_menu_term_id'] = $nav_menu_term_id;
1490  
1491                  if ( isset( $nav_menu_item['object_id'] ) ) {
1492                      if ( 'post_type' === $nav_menu_item['type'] && preg_match( '/^{{(?P<symbol>.+)}}$/', $nav_menu_item['object_id'], $matches ) && isset( $posts[ $matches['symbol'] ] ) ) {
1493                          $nav_menu_item['object_id'] = $posts[ $matches['symbol'] ]['ID'];
1494                          if ( empty( $nav_menu_item['title'] ) ) {
1495                              $original_object        = get_post( $nav_menu_item['object_id'] );
1496                              $nav_menu_item['title'] = $original_object->post_title;
1497                          }
1498                      } else {
1499                          continue;
1500                      }
1501                  } else {
1502                      $nav_menu_item['object_id'] = 0;
1503                  }
1504  
1505                  if ( empty( $changeset_data[ $nav_menu_item_setting_id ] ) || ! empty( $changeset_data[ $nav_menu_item_setting_id ]['starter_content'] ) ) {
1506                      $this->set_post_value( $nav_menu_item_setting_id, $nav_menu_item );
1507                      $this->pending_starter_content_settings_ids[] = $nav_menu_item_setting_id;
1508                  }
1509              }
1510  
1511              $setting_id = sprintf( 'nav_menu_locations[%s]', $nav_menu_location );
1512              if ( empty( $changeset_data[ $setting_id ] ) || ! empty( $changeset_data[ $setting_id ]['starter_content'] ) ) {
1513                  $this->set_post_value( $setting_id, $nav_menu_term_id );
1514                  $this->pending_starter_content_settings_ids[] = $setting_id;
1515              }
1516          }
1517  
1518          // Options.
1519          foreach ( $options as $name => $value ) {
1520  
1521              // Serialize the value to check for post symbols.
1522              $value = maybe_serialize( $value );
1523  
1524              if ( is_serialized( $value ) ) {
1525                  if ( preg_match( '/s:\d+:"{{(?P<symbol>.+)}}"/', $value, $matches ) ) {
1526                      if ( isset( $posts[ $matches['symbol'] ] ) ) {
1527                          $symbol_match = $posts[ $matches['symbol'] ]['ID'];
1528                      } elseif ( isset( $attachment_ids[ $matches['symbol'] ] ) ) {
1529                          $symbol_match = $attachment_ids[ $matches['symbol'] ];
1530                      }
1531  
1532                      // If we have any symbol matches, update the values.
1533                      if ( isset( $symbol_match ) ) {
1534                          // Replace found string matches with post IDs.
1535                          $value = str_replace( $matches[0], "i:{$symbol_match}", $value );
1536                      } else {
1537                          continue;
1538                      }
1539                  }
1540              } elseif ( preg_match( '/^{{(?P<symbol>.+)}}$/', $value, $matches ) ) {
1541                  if ( isset( $posts[ $matches['symbol'] ] ) ) {
1542                      $value = $posts[ $matches['symbol'] ]['ID'];
1543                  } elseif ( isset( $attachment_ids[ $matches['symbol'] ] ) ) {
1544                      $value = $attachment_ids[ $matches['symbol'] ];
1545                  } else {
1546                      continue;
1547                  }
1548              }
1549  
1550              // Unserialize values after checking for post symbols, so they can be properly referenced.
1551              $value = maybe_unserialize( $value );
1552  
1553              if ( empty( $changeset_data[ $name ] ) || ! empty( $changeset_data[ $name ]['starter_content'] ) ) {
1554                  $this->set_post_value( $name, $value );
1555                  $this->pending_starter_content_settings_ids[] = $name;
1556              }
1557          }
1558  
1559          // Theme mods.
1560          foreach ( $theme_mods as $name => $value ) {
1561  
1562              // Serialize the value to check for post symbols.
1563              $value = maybe_serialize( $value );
1564  
1565              // Check if value was serialized.
1566              if ( is_serialized( $value ) ) {
1567                  if ( preg_match( '/s:\d+:"{{(?P<symbol>.+)}}"/', $value, $matches ) ) {
1568                      if ( isset( $posts[ $matches['symbol'] ] ) ) {
1569                          $symbol_match = $posts[ $matches['symbol'] ]['ID'];
1570                      } elseif ( isset( $attachment_ids[ $matches['symbol'] ] ) ) {
1571                          $symbol_match = $attachment_ids[ $matches['symbol'] ];
1572                      }
1573  
1574                      // If we have any symbol matches, update the values.
1575                      if ( isset( $symbol_match ) ) {
1576                          // Replace found string matches with post IDs.
1577                          $value = str_replace( $matches[0], "i:{$symbol_match}", $value );
1578                      } else {
1579                          continue;
1580                      }
1581                  }
1582              } elseif ( preg_match( '/^{{(?P<symbol>.+)}}$/', $value, $matches ) ) {
1583                  if ( isset( $posts[ $matches['symbol'] ] ) ) {
1584                      $value = $posts[ $matches['symbol'] ]['ID'];
1585                  } elseif ( isset( $attachment_ids[ $matches['symbol'] ] ) ) {
1586                      $value = $attachment_ids[ $matches['symbol'] ];
1587                  } else {
1588                      continue;
1589                  }
1590              }
1591  
1592              // Unserialize values after checking for post symbols, so they can be properly referenced.
1593              $value = maybe_unserialize( $value );
1594  
1595              // Handle header image as special case since setting has a legacy format.
1596              if ( 'header_image' === $name ) {
1597                  $name     = 'header_image_data';
1598                  $metadata = wp_get_attachment_metadata( $value );
1599                  if ( empty( $metadata ) ) {
1600                      continue;
1601                  }
1602                  $value = array(
1603                      'attachment_id' => $value,
1604                      'url'           => wp_get_attachment_url( $value ),
1605                      'height'        => $metadata['height'],
1606                      'width'         => $metadata['width'],
1607                  );
1608              } elseif ( 'background_image' === $name ) {
1609                  $value = wp_get_attachment_url( $value );
1610              }
1611  
1612              if ( empty( $changeset_data[ $name ] ) || ! empty( $changeset_data[ $name ]['starter_content'] ) ) {
1613                  $this->set_post_value( $name, $value );
1614                  $this->pending_starter_content_settings_ids[] = $name;
1615              }
1616          }
1617  
1618          if ( ! empty( $this->pending_starter_content_settings_ids ) ) {
1619              if ( did_action( 'customize_register' ) ) {
1620                  $this->_save_starter_content_changeset();
1621              } else {
1622                  add_action( 'customize_register', array( $this, '_save_starter_content_changeset' ), 1000 );
1623              }
1624          }
1625      }
1626  
1627      /**
1628       * Prepare starter content attachments.
1629       *
1630       * Ensure that the attachments are valid and that they have slugs and file name/path.
1631       *
1632       * @since 4.7.0
1633       *
1634       * @param array $attachments Attachments.
1635       * @return array Prepared attachments.
1636       */
1637  	protected function prepare_starter_content_attachments( $attachments ) {
1638          $prepared_attachments = array();
1639          if ( empty( $attachments ) ) {
1640              return $prepared_attachments;
1641          }
1642  
1643          // Such is The WordPress Way.
1644          require_once ( ABSPATH . 'wp-admin/includes/file.php' );
1645          require_once ( ABSPATH . 'wp-admin/includes/media.php' );
1646          require_once ( ABSPATH . 'wp-admin/includes/image.php' );
1647  
1648          foreach ( $attachments as $symbol => $attachment ) {
1649  
1650              // A file is required and URLs to files are not currently allowed.
1651              if ( empty( $attachment['file'] ) || preg_match( '#^https?://$#', $attachment['file'] ) ) {
1652                  continue;
1653              }
1654  
1655              $file_path = null;
1656              if ( file_exists( $attachment['file'] ) ) {
1657                  $file_path = $attachment['file']; // Could be absolute path to file in plugin.
1658              } elseif ( is_child_theme() && file_exists( get_stylesheet_directory() . '/' . $attachment['file'] ) ) {
1659                  $file_path = get_stylesheet_directory() . '/' . $attachment['file'];
1660              } elseif ( file_exists( get_template_directory() . '/' . $attachment['file'] ) ) {
1661                  $file_path = get_template_directory() . '/' . $attachment['file'];
1662              } else {
1663                  continue;
1664              }
1665              $file_name = wp_basename( $attachment['file'] );
1666  
1667              // Skip file types that are not recognized.
1668              $checked_filetype = wp_check_filetype( $file_name );
1669              if ( empty( $checked_filetype['type'] ) ) {
1670                  continue;
1671              }
1672  
1673              // Ensure post_name is set since not automatically derived from post_title for new auto-draft posts.
1674              if ( empty( $attachment['post_name'] ) ) {
1675                  if ( ! empty( $attachment['post_title'] ) ) {
1676                      $attachment['post_name'] = sanitize_title( $attachment['post_title'] );
1677                  } else {
1678                      $attachment['post_name'] = sanitize_title( preg_replace( '/\.\w+$/', '', $file_name ) );
1679                  }
1680              }
1681  
1682              $attachment['file_name']         = $file_name;
1683              $attachment['file_path']         = $file_path;
1684              $prepared_attachments[ $symbol ] = $attachment;
1685          }
1686          return $prepared_attachments;
1687      }
1688  
1689      /**
1690       * Save starter content changeset.
1691       *
1692       * @since 4.7.0
1693       */
1694  	public function _save_starter_content_changeset() {
1695  
1696          if ( empty( $this->pending_starter_content_settings_ids ) ) {
1697              return;
1698          }
1699  
1700          $this->save_changeset_post(
1701              array(
1702                  'data'            => array_fill_keys( $this->pending_starter_content_settings_ids, array( 'starter_content' => true ) ),
1703                  'starter_content' => true,
1704              )
1705          );
1706          $this->saved_starter_content_changeset = true;
1707  
1708          $this->pending_starter_content_settings_ids = array();
1709      }
1710  
1711      /**
1712       * Get dirty pre-sanitized setting values in the current customized state.
1713       *
1714       * The returned array consists of a merge of three sources:
1715       * 1. If the theme is not currently active, then the base array is any stashed
1716       *    theme mods that were modified previously but never published.
1717       * 2. The values from the current changeset, if it exists.
1718       * 3. If the user can customize, the values parsed from the incoming
1719       *    `$_POST['customized']` JSON data.
1720       * 4. Any programmatically-set post values via `WP_Customize_Manager::set_post_value()`.
1721       *
1722       * The name "unsanitized_post_values" is a carry-over from when the customized
1723       * state was exclusively sourced from `$_POST['customized']`. Nevertheless,
1724       * the value returned will come from the current changeset post and from the
1725       * incoming post data.
1726       *
1727       * @since 4.1.1
1728       * @since 4.7.0 Added `$args` parameter and merging with changeset values and stashed theme mods.
1729       *
1730       * @param array $args {
1731       *     Args.
1732       *
1733       *     @type bool $exclude_changeset Whether the changeset values should also be excluded. Defaults to false.
1734       *     @type bool $exclude_post_data Whether the post input values should also be excluded. Defaults to false when lacking the customize capability.
1735       * }
1736       * @return array
1737       */
1738  	public function unsanitized_post_values( $args = array() ) {
1739          $args = array_merge(
1740              array(
1741                  'exclude_changeset' => false,
1742                  'exclude_post_data' => ! current_user_can( 'customize' ),
1743              ),
1744              $args
1745          );
1746  
1747          $values = array();
1748  
1749          // Let default values be from the stashed theme mods if doing a theme switch and if no changeset is present.
1750          if ( ! $this->is_theme_active() ) {
1751              $stashed_theme_mods = get_option( 'customize_stashed_theme_mods' );
1752              $stylesheet         = $this->get_stylesheet();
1753              if ( isset( $stashed_theme_mods[ $stylesheet ] ) ) {
1754                  $values = array_merge( $values, wp_list_pluck( $stashed_theme_mods[ $stylesheet ], 'value' ) );
1755              }
1756          }
1757  
1758          if ( ! $args['exclude_changeset'] ) {
1759              foreach ( $this->changeset_data() as $setting_id => $setting_params ) {
1760                  if ( ! array_key_exists( 'value', $setting_params ) ) {
1761                      continue;
1762                  }
1763                  if ( isset( $setting_params['type'] ) && 'theme_mod' === $setting_params['type'] ) {
1764  
1765                      // Ensure that theme mods values are only used if they were saved under the current theme.
1766                      $namespace_pattern = '/^(?P<stylesheet>.+?)::(?P<setting_id>.+)$/';
1767                      if ( preg_match( $namespace_pattern, $setting_id, $matches ) && $this->get_stylesheet() === $matches['stylesheet'] ) {
1768                          $values[ $matches['setting_id'] ] = $setting_params['value'];
1769                      }
1770                  } else {
1771                      $values[ $setting_id ] = $setting_params['value'];
1772                  }
1773              }
1774          }
1775  
1776          if ( ! $args['exclude_post_data'] ) {
1777              if ( ! isset( $this->_post_values ) ) {
1778                  if ( isset( $_POST['customized'] ) ) {
1779                      $post_values = json_decode( wp_unslash( $_POST['customized'] ), true );
1780                  } else {
1781                      $post_values = array();
1782                  }
1783                  if ( is_array( $post_values ) ) {
1784                      $this->_post_values = $post_values;
1785                  } else {
1786                      $this->_post_values = array();
1787                  }
1788              }
1789              $values = array_merge( $values, $this->_post_values );
1790          }
1791          return $values;
1792      }
1793  
1794      /**
1795       * Returns the sanitized value for a given setting from the current customized state.
1796       *
1797       * The name "post_value" is a carry-over from when the customized state was exclusively
1798       * sourced from `$_POST['customized']`. Nevertheless, the value returned will come
1799       * from the current changeset post and from the incoming post data.
1800       *
1801       * @since 3.4.0
1802       * @since 4.1.1 Introduced the `$default` parameter.
1803       * @since 4.6.0 `$default` is now returned early when the setting post value is invalid.
1804       *
1805       * @see WP_REST_Server::dispatch()
1806       * @see WP_REST_Request::sanitize_params()
1807       * @see WP_REST_Request::has_valid_params()
1808       *
1809       * @param WP_Customize_Setting $setting A WP_Customize_Setting derived object.
1810       * @param mixed                $default Value returned $setting has no post value (added in 4.2.0)
1811       *                                      or the post value is invalid (added in 4.6.0).
1812       * @return string|mixed $post_value Sanitized value or the $default provided.
1813       */
1814  	public function post_value( $setting, $default = null ) {
1815          $post_values = $this->unsanitized_post_values();
1816          if ( ! array_key_exists( $setting->id, $post_values ) ) {
1817              return $default;
1818          }
1819          $value = $post_values[ $setting->id ];
1820          $valid = $setting->validate( $value );
1821          if ( is_wp_error( $valid ) ) {
1822              return $default;
1823          }
1824          $value = $setting->sanitize( $value );
1825          if ( is_null( $value ) || is_wp_error( $value ) ) {
1826              return $default;
1827          }
1828          return $value;
1829      }
1830  
1831      /**
1832       * Override a setting's value in the current customized state.
1833       *
1834       * The name "post_value" is a carry-over from when the customized state was
1835       * exclusively sourced from `$_POST['customized']`.
1836       *
1837       * @since 4.2.0
1838       *
1839       * @param string $setting_id ID for the WP_Customize_Setting instance.
1840       * @param mixed  $value      Post value.
1841       */
1842  	public function set_post_value( $setting_id, $value ) {
1843          $this->unsanitized_post_values(); // Populate _post_values from $_POST['customized'].
1844          $this->_post_values[ $setting_id ] = $value;
1845  
1846          /**
1847           * Announce when a specific setting's unsanitized post value has been set.
1848           *
1849           * Fires when the WP_Customize_Manager::set_post_value() method is called.
1850           *
1851           * The dynamic portion of the hook name, `$setting_id`, refers to the setting ID.
1852           *
1853           * @since 4.4.0
1854           *
1855           * @param mixed                $value Unsanitized setting post value.
1856           * @param WP_Customize_Manager $this  WP_Customize_Manager instance.
1857           */
1858          do_action( "customize_post_value_set_{$setting_id}", $value, $this );
1859  
1860          /**
1861           * Announce when any setting's unsanitized post value has been set.
1862           *
1863           * Fires when the WP_Customize_Manager::set_post_value() method is called.
1864           *
1865           * This is useful for `WP_Customize_Setting` instances to watch
1866           * in order to update a cached previewed value.
1867           *
1868           * @since 4.4.0
1869           *
1870           * @param string               $setting_id Setting ID.
1871           * @param mixed                $value      Unsanitized setting post value.
1872           * @param WP_Customize_Manager $this       WP_Customize_Manager instance.
1873           */
1874          do_action( 'customize_post_value_set', $setting_id, $value, $this );
1875      }
1876  
1877      /**
1878       * Print JavaScript settings.
1879       *
1880       * @since 3.4.0
1881       */
1882  	public function customize_preview_init() {
1883  
1884          /*
1885           * Now that Customizer previews are loaded into iframes via GET requests
1886           * and natural URLs with transaction UUIDs added, we need to ensure that
1887           * the responses are never cached by proxies. In practice, this will not
1888           * be needed if the user is logged-in anyway. But if anonymous access is
1889           * allowed then the auth cookies would not be sent and WordPress would
1890           * not send no-cache headers by default.
1891           */
1892          if ( ! headers_sent() ) {
1893              nocache_headers();
1894              header( 'X-Robots: noindex, nofollow, noarchive' );
1895          }
1896          add_action( 'wp_head', 'wp_no_robots' );
1897          add_filter( 'wp_headers', array( $this, 'filter_iframe_security_headers' ) );
1898  
1899          /*
1900           * If preview is being served inside the customizer preview iframe, and
1901           * if the user doesn't have customize capability, then it is assumed
1902           * that the user's session has expired and they need to re-authenticate.
1903           */
1904          if ( $this->messenger_channel && ! current_user_can( 'customize' ) ) {
1905              $this->wp_die( -1, __( 'Unauthorized. You may remove the customize_messenger_channel param to preview as frontend.' ) );
1906              return;
1907          }
1908  
1909          $this->prepare_controls();
1910  
1911          add_filter( 'wp_redirect', array( $this, 'add_state_query_params' ) );
1912  
1913          wp_enqueue_script( 'customize-preview' );
1914          wp_enqueue_style( 'customize-preview' );
1915          add_action( 'wp_head', array( $this, 'customize_preview_loading_style' ) );
1916          add_action( 'wp_head', array( $this, 'remove_frameless_preview_messenger_channel' ) );
1917          add_action( 'wp_footer', array( $this, 'customize_preview_settings' ), 20 );
1918          add_filter( 'get_edit_post_link', '__return_empty_string' );
1919  
1920          /**
1921           * Fires once the Customizer preview has initialized and JavaScript
1922           * settings have been printed.
1923           *
1924           * @since 3.4.0
1925           *
1926           * @param WP_Customize_Manager $this WP_Customize_Manager instance.
1927           */
1928          do_action( 'customize_preview_init', $this );
1929      }
1930  
1931      /**
1932       * Filter the X-Frame-Options and Content-Security-Policy headers to ensure frontend can load in customizer.
1933       *
1934       * @since 4.7.0
1935       *
1936       * @param array $headers Headers.
1937       * @return array Headers.
1938       */
1939  	public function filter_iframe_security_headers( $headers ) {
1940          $headers['X-Frame-Options']         = 'SAMEORIGIN';
1941          $headers['Content-Security-Policy'] = "frame-ancestors 'self'";
1942          return $headers;
1943      }
1944  
1945      /**
1946       * Add customize state query params to a given URL if preview is allowed.
1947       *
1948       * @since 4.7.0
1949       * @see wp_redirect()
1950       * @see WP_Customize_Manager::get_allowed_url()
1951       *
1952       * @param string $url URL.
1953       * @return string URL.
1954       */
1955  	public function add_state_query_params( $url ) {
1956          $parsed_original_url = wp_parse_url( $url );
1957          $is_allowed          = false;
1958          foreach ( $this->get_allowed_urls() as $allowed_url ) {
1959              $parsed_allowed_url = wp_parse_url( $allowed_url );
1960              $is_allowed         = (
1961                  $parsed_allowed_url['scheme'] === $parsed_original_url['scheme']
1962                  &&
1963                  $parsed_allowed_url['host'] === $parsed_original_url['host']
1964                  &&
1965                  0 === strpos( $parsed_original_url['path'], $parsed_allowed_url['path'] )
1966              );
1967              if ( $is_allowed ) {
1968                  break;
1969              }
1970          }
1971  
1972          if ( $is_allowed ) {
1973              $query_params = array(
1974                  'customize_changeset_uuid' => $this->changeset_uuid(),
1975              );
1976              if ( ! $this->is_theme_active() ) {
1977                  $query_params['customize_theme'] = $this->get_stylesheet();
1978              }
1979              if ( $this->messenger_channel ) {
1980                  $query_params['customize_messenger_channel'] = $this->messenger_channel;
1981              }
1982              $url = add_query_arg( $query_params, $url );
1983          }
1984  
1985          return $url;
1986      }
1987  
1988      /**
1989       * Prevent sending a 404 status when returning the response for the customize
1990       * preview, since it causes the jQuery Ajax to fail. Send 200 instead.
1991       *
1992       * @since 4.0.0
1993       * @deprecated 4.7.0
1994       */
1995  	public function customize_preview_override_404_status() {
1996          _deprecated_function( __METHOD__, '4.7.0' );
1997      }
1998  
1999      /**
2000       * Print base element for preview frame.
2001       *
2002       * @since 3.4.0
2003       * @deprecated 4.7.0
2004       */
2005  	public function customize_preview_base() {
2006          _deprecated_function( __METHOD__, '4.7.0' );
2007      }
2008  
2009      /**
2010       * Print a workaround to handle HTML5 tags in IE < 9.
2011       *
2012       * @since 3.4.0
2013       * @deprecated 4.7.0 Customizer no longer supports IE8, so all supported browsers recognize HTML5.
2014       */
2015  	public function customize_preview_html5() {
2016          _deprecated_function( __FUNCTION__, '4.7.0' );
2017      }
2018  
2019      /**
2020       * Print CSS for loading indicators for the Customizer preview.
2021       *
2022       * @since 4.2.0
2023       */
2024  	public function customize_preview_loading_style() {
2025          ?>
2026          <style>
2027              body.wp-customizer-unloading {
2028                  opacity: 0.25;
2029                  cursor: progress !important;
2030                  -webkit-transition: opacity 0.5s;
2031                  transition: opacity 0.5s;
2032              }
2033              body.wp-customizer-unloading * {
2034                  pointer-events: none !important;
2035              }
2036              form.customize-unpreviewable,
2037              form.customize-unpreviewable input,
2038              form.customize-unpreviewable select,
2039              form.customize-unpreviewable button,
2040              a.customize-unpreviewable,
2041              area.customize-unpreviewable {
2042                  cursor: not-allowed !important;
2043              }
2044          </style>
2045          <?php
2046      }
2047  
2048      /**
2049       * Remove customize_messenger_channel query parameter from the preview window when it is not in an iframe.
2050       *
2051       * This ensures that the admin bar will be shown. It also ensures that link navigation will
2052       * work as expected since the parent frame is not being sent the URL to navigate to.
2053       *
2054       * @since 4.7.0
2055       */
2056  	public function remove_frameless_preview_messenger_channel() {
2057          if ( ! $this->messenger_channel ) {
2058              return;
2059          }
2060          ?>
2061          <script>
2062          ( function() {
2063              var urlParser, oldQueryParams, newQueryParams, i;
2064              if ( parent !== window ) {
2065                  return;
2066              }
2067              urlParser = document.createElement( 'a' );
2068              urlParser.href = location.href;
2069              oldQueryParams = urlParser.search.substr( 1 ).split( /&/ );
2070              newQueryParams = [];
2071              for ( i = 0; i < oldQueryParams.length; i += 1 ) {
2072                  if ( ! /^customize_messenger_channel=/.test( oldQueryParams[ i ] ) ) {
2073                      newQueryParams.push( oldQueryParams[ i ] );
2074                  }
2075              }
2076              urlParser.search = newQueryParams.join( '&' );
2077              if ( urlParser.search !== location.search ) {
2078                  location.replace( urlParser.href );
2079              }
2080          } )();
2081          </script>
2082          <?php
2083      }
2084  
2085      /**
2086       * Print JavaScript settings for preview frame.
2087       *
2088       * @since 3.4.0
2089       */
2090  	public function customize_preview_settings() {
2091          $post_values                 = $this->unsanitized_post_values( array( 'exclude_changeset' => true ) );
2092          $setting_validities          = $this->validate_setting_values( $post_values );
2093          $exported_setting_validities = array_map( array( $this, 'prepare_setting_validity_for_js' ), $setting_validities );
2094  
2095          // Note that the REQUEST_URI is not passed into home_url() since this breaks subdirectory installations.
2096          $self_url           = empty( $_SERVER['REQUEST_URI'] ) ? home_url( '/' ) : esc_url_raw( wp_unslash( $_SERVER['REQUEST_URI'] ) );
2097          $state_query_params = array(
2098              'customize_theme',
2099              'customize_changeset_uuid',
2100              'customize_messenger_channel',
2101          );
2102          $self_url           = remove_query_arg( $state_query_params, $self_url );
2103  
2104          $allowed_urls  = $this->get_allowed_urls();
2105          $allowed_hosts = array();
2106          foreach ( $allowed_urls as $allowed_url ) {
2107              $parsed = wp_parse_url( $allowed_url );
2108              if ( empty( $parsed['host'] ) ) {
2109                  continue;
2110              }
2111              $host = $parsed['host'];
2112              if ( ! empty( $parsed['port'] ) ) {
2113                  $host .= ':' . $parsed['port'];
2114              }
2115              $allowed_hosts[] = $host;
2116          }
2117  
2118          $switched_locale = switch_to_locale( get_user_locale() );
2119          $l10n            = array(
2120              'shiftClickToEdit'  => __( 'Shift-click to edit this element.' ),
2121              'linkUnpreviewable' => __( 'This link is not live-previewable.' ),
2122              'formUnpreviewable' => __( 'This form is not live-previewable.' ),
2123          );
2124          if ( $switched_locale ) {
2125              restore_previous_locale();
2126          }
2127  
2128          $settings = array(
2129              'changeset'         => array(
2130                  'uuid'      => $this->changeset_uuid(),
2131                  'autosaved' => $this->autosaved(),
2132              ),
2133              'timeouts'          => array(
2134                  'selectiveRefresh' => 250,
2135                  'keepAliveSend'    => 1000,
2136              ),
2137              'theme'             => array(
2138                  'stylesheet' => $this->get_stylesheet(),
2139                  'active'     => $this->is_theme_active(),
2140              ),
2141              'url'               => array(
2142                  'self'          => $self_url,
2143                  'allowed'       => array_map( 'esc_url_raw', $this->get_allowed_urls() ),
2144                  'allowedHosts'  => array_unique( $allowed_hosts ),
2145                  'isCrossDomain' => $this->is_cross_domain(),
2146              ),
2147              'channel'           => $this->messenger_channel,
2148              'activePanels'      => array(),
2149              'activeSections'    => array(),
2150              'activeControls'    => array(),
2151              'settingValidities' => $exported_setting_validities,
2152              'nonce'             => current_user_can( 'customize' ) ? $this->get_nonces() : array(),
2153              'l10n'              => $l10n,
2154              '_dirty'            => array_keys( $post_values ),
2155          );
2156  
2157          foreach ( $this->panels as $panel_id => $panel ) {
2158              if ( $panel->check_capabilities() ) {
2159                  $settings['activePanels'][ $panel_id ] = $panel->active();
2160                  foreach ( $panel->sections as $section_id => $section ) {
2161                      if ( $section->check_capabilities() ) {
2162                          $settings['activeSections'][ $section_id ] = $section->active();
2163                      }
2164                  }
2165              }
2166          }
2167          foreach ( $this->sections as $id => $section ) {
2168              if ( $section->check_capabilities() ) {
2169                  $settings['activeSections'][ $id ] = $section->active();
2170              }
2171          }
2172          foreach ( $this->controls as $id => $control ) {
2173              if ( $control->check_capabilities() ) {
2174                  $settings['activeControls'][ $id ] = $control->active();
2175              }
2176          }
2177  
2178          ?>
2179          <script type="text/javascript">
2180              var _wpCustomizeSettings = <?php echo wp_json_encode( $settings ); ?>;
2181              _wpCustomizeSettings.values = {};
2182              (function( v ) {
2183                  <?php
2184                  /*
2185                   * Serialize settings separately from the initial _wpCustomizeSettings
2186                   * serialization in order to avoid a peak memory usage spike.
2187                   * @todo We may not even need to export the values at all since the pane syncs them anyway.
2188                   */
2189                  foreach ( $this->settings as $id => $setting ) {
2190                      if ( $setting->check_capabilities() ) {
2191                          printf(
2192                              "v[%s] = %s;\n",
2193                              wp_json_encode( $id ),
2194                              wp_json_encode( $setting->js_value() )
2195                          );
2196                      }
2197                  }
2198                  ?>
2199              })( _wpCustomizeSettings.values );
2200          </script>
2201          <?php
2202      }
2203  
2204      /**
2205       * Prints a signature so we can ensure the Customizer was properly executed.
2206       *
2207       * @since 3.4.0
2208       * @deprecated 4.7.0
2209       */
2210  	public function customize_preview_signature() {
2211          _deprecated_function( __METHOD__, '4.7.0' );
2212      }
2213  
2214      /**
2215       * Removes the signature in case we experience a case where the Customizer was not properly executed.
2216       *
2217       * @since 3.4.0
2218       * @deprecated 4.7.0
2219       *
2220       * @param mixed $return Value passed through for {@see 'wp_die_handler'} filter.
2221       * @return mixed Value passed through for {@see 'wp_die_handler'} filter.
2222       */
2223  	public function remove_preview_signature( $return = null ) {
2224          _deprecated_function( __METHOD__, '4.7.0' );
2225  
2226          return $return;
2227      }
2228  
2229      /**
2230       * Is it a theme preview?
2231       *
2232       * @since 3.4.0
2233       *
2234       * @return bool True if it's a preview, false if not.
2235       */
2236  	public function is_preview() {
2237          return (bool) $this->previewing;
2238      }
2239  
2240      /**
2241       * Retrieve the template name of the previewed theme.
2242       *
2243       * @since 3.4.0
2244       *
2245       * @return string Template name.
2246       */
2247  	public function get_template() {
2248          return $this->theme()->get_template();
2249      }
2250  
2251      /**
2252       * Retrieve the stylesheet name of the previewed theme.
2253       *
2254       * @since 3.4.0
2255       *
2256       * @return string Stylesheet name.
2257       */
2258  	public function get_stylesheet() {
2259          return $this->theme()->get_stylesheet();
2260      }
2261  
2262      /**
2263       * Retrieve the template root of the previewed theme.
2264       *
2265       * @since 3.4.0
2266       *
2267       * @return string Theme root.
2268       */
2269  	public function get_template_root() {
2270          return get_raw_theme_root( $this->get_template(), true );
2271      }
2272  
2273      /**
2274       * Retrieve the stylesheet root of the previewed theme.
2275       *
2276       * @since 3.4.0
2277       *
2278       * @return string Theme root.
2279       */
2280  	public function get_stylesheet_root() {
2281          return get_raw_theme_root( $this->get_stylesheet(), true );
2282      }
2283  
2284      /**
2285       * Filters the current theme and return the name of the previewed theme.
2286       *
2287       * @since 3.4.0
2288       *
2289       * @param $current_theme {@internal Parameter is not used}
2290       * @return string Theme name.
2291       */
2292  	public function current_theme( $current_theme ) {
2293          return $this->theme()->display( 'Name' );
2294      }
2295  
2296      /**
2297       * Validates setting values.
2298       *
2299       * Validation is skipped for unregistered settings or for values that are
2300       * already null since they will be skipped anyway. Sanitization is applied
2301       * to values that pass validation, and values that become null or `WP_Error`
2302       * after sanitizing are marked invalid.
2303       *
2304       * @since 4.6.0
2305       *
2306       * @see WP_REST_Request::has_valid_params()
2307       * @see WP_Customize_Setting::validate()
2308       *
2309       * @param array $setting_values Mapping of setting IDs to values to validate and sanitize.
2310       * @param array $options {
2311       *     Options.
2312       *
2313       *     @type bool $validate_existence  Whether a setting's existence will be checked.
2314       *     @type bool $validate_capability Whether the setting capability will be checked.
2315       * }
2316       * @return array Mapping of setting IDs to return value of validate method calls, either `true` or `WP_Error`.
2317       */
2318  	public function validate_setting_values( $setting_values, $options = array() ) {
2319          $options = wp_parse_args(
2320              $options,
2321              array(
2322                  'validate_capability' => false,
2323                  'validate_existence'  => false,
2324              )
2325          );
2326  
2327          $validities = array();
2328          foreach ( $setting_values as $setting_id => $unsanitized_value ) {
2329              $setting = $this->get_setting( $setting_id );
2330              if ( ! $setting ) {
2331                  if ( $options['validate_existence'] ) {
2332                      $validities[ $setting_id ] = new WP_Error( 'unrecognized', __( 'Setting does not exist or is unrecognized.' ) );
2333                  }
2334                  continue;
2335              }
2336              if ( $options['validate_capability'] && ! current_user_can( $setting->capability ) ) {
2337                  $validity = new WP_Error( 'unauthorized', __( 'Unauthorized to modify setting due to capability.' ) );
2338              } else {
2339                  if ( is_null( $unsanitized_value ) ) {
2340                      continue;
2341                  }
2342                  $validity = $setting->validate( $unsanitized_value );
2343              }
2344              if ( ! is_wp_error( $validity ) ) {
2345                  /** This filter is documented in wp-includes/class-wp-customize-setting.php */
2346                  $late_validity = apply_filters( "customize_validate_{$setting->id}", new WP_Error(), $unsanitized_value, $setting );
2347                  if ( is_wp_error( $late_validity ) && $late_validity->has_errors() ) {
2348                      $validity = $late_validity;
2349                  }
2350              }
2351              if ( ! is_wp_error( $validity ) ) {
2352                  $value = $setting->sanitize( $unsanitized_value );
2353                  if ( is_null( $value ) ) {
2354                      $validity = false;
2355                  } elseif ( is_wp_error( $value ) ) {
2356                      $validity = $value;
2357                  }
2358              }
2359              if ( false === $validity ) {
2360                  $validity = new WP_Error( 'invalid_value', __( 'Invalid value.' ) );
2361              }
2362              $validities[ $setting_id ] = $validity;
2363          }
2364          return $validities;
2365      }
2366  
2367      /**
2368       * Prepares setting validity for exporting to the client (JS).
2369       *
2370       * Converts `WP_Error` instance into array suitable for passing into the
2371       * `wp.customize.Notification` JS model.
2372       *
2373       * @since 4.6.0
2374       *
2375       * @param true|WP_Error $validity Setting validity.
2376       * @return true|array If `$validity` was a WP_Error, the error codes will be array-mapped
2377       *                    to their respective `message` and `data` to pass into the
2378       *                    `wp.customize.Notification` JS model.
2379       */
2380  	public function prepare_setting_validity_for_js( $validity ) {
2381          if ( is_wp_error( $validity ) ) {
2382              $notification = array();
2383              foreach ( $validity->errors as $error_code => $error_messages ) {
2384                  $notification[ $error_code ] = array(
2385                      'message' => join( ' ', $error_messages ),
2386                      'data'    => $validity->get_error_data( $error_code ),
2387                  );
2388              }
2389              return $notification;
2390          } else {
2391              return true;
2392          }
2393      }
2394  
2395      /**
2396       * Handle customize_save WP Ajax request to save/update a changeset.
2397       *
2398       * @since 3.4.0
2399       * @since 4.7.0 The semantics of this method have changed to update a changeset, optionally to also change the status and other attributes.
2400       */
2401  	public function save() {
2402          if ( ! is_user_logged_in() ) {
2403              wp_send_json_error( 'unauthenticated' );
2404          }
2405  
2406          if ( ! $this->is_preview() ) {
2407              wp_send_json_error( 'not_preview' );
2408          }
2409  
2410          $action = 'save-customize_' . $this->get_stylesheet();
2411          if ( ! check_ajax_referer( $action, 'nonce', false ) ) {
2412              wp_send_json_error( 'invalid_nonce' );
2413          }
2414  
2415          $changeset_post_id = $this->changeset_post_id();
2416          $is_new_changeset  = empty( $changeset_post_id );
2417          if ( $is_new_changeset ) {
2418              if ( ! current_user_can( get_post_type_object( 'customize_changeset' )->cap->create_posts ) ) {
2419                  wp_send_json_error( 'cannot_create_changeset_post' );
2420              }
2421          } else {
2422              if ( ! current_user_can( get_post_type_object( 'customize_changeset' )->cap->edit_post, $changeset_post_id ) ) {
2423                  wp_send_json_error( 'cannot_edit_changeset_post' );
2424              }
2425          }
2426  
2427          if ( ! empty( $_POST['customize_changeset_data'] ) ) {
2428              $input_changeset_data = json_decode( wp_unslash( $_POST['customize_changeset_data'] ), true );
2429              if ( ! is_array( $input_changeset_data ) ) {
2430                  wp_send_json_error( 'invalid_customize_changeset_data' );
2431              }
2432          } else {
2433              $input_changeset_data = array();
2434          }
2435  
2436          // Validate title.
2437          $changeset_title = null;
2438          if ( isset( $_POST['customize_changeset_title'] ) ) {
2439              $changeset_title = sanitize_text_field( wp_unslash( $_POST['customize_changeset_title'] ) );
2440          }
2441  
2442          // Validate changeset status param.
2443          $is_publish       = null;
2444          $changeset_status = null;
2445          if ( isset( $_POST['customize_changeset_status'] ) ) {
2446              $changeset_status = wp_unslash( $_POST['customize_changeset_status'] );
2447              if ( ! get_post_status_object( $changeset_status ) || ! in_array( $changeset_status, array( 'draft', 'pending', 'publish', 'future' ), true ) ) {
2448                  wp_send_json_error( 'bad_customize_changeset_status', 400 );
2449              }
2450              $is_publish = ( 'publish' === $changeset_status || 'future' === $changeset_status );
2451              if ( $is_publish && ! current_user_can( get_post_type_object( 'customize_changeset' )->cap->publish_posts ) ) {
2452                  wp_send_json_error( 'changeset_publish_unauthorized', 403 );
2453              }
2454          }
2455  
2456          /*
2457           * Validate changeset date param. Date is assumed to be in local time for
2458           * the WP if in MySQL format (YYYY-MM-DD HH:MM:SS). Otherwise, the date
2459           * is parsed with strtotime() so that ISO date format may be supplied
2460           * or a string like "+10 minutes".
2461           */
2462          $changeset_date_gmt = null;
2463          if ( isset( $_POST['customize_changeset_date'] ) ) {
2464              $changeset_date = wp_unslash( $_POST['customize_changeset_date'] );
2465              if ( preg_match( '/^\d\d\d\d-\d\d-\d\d \d\d:\d\d:\d\d$/', $changeset_date ) ) {
2466                  $mm         = substr( $changeset_date, 5, 2 );
2467                  $jj         = substr( $changeset_date, 8, 2 );
2468                  $aa         = substr( $changeset_date, 0, 4 );
2469                  $valid_date = wp_checkdate( $mm, $jj, $aa, $changeset_date );
2470                  if ( ! $valid_date ) {
2471                      wp_send_json_error( 'bad_customize_changeset_date', 400 );
2472                  }
2473                  $changeset_date_gmt = get_gmt_from_date( $changeset_date );
2474              } else {
2475                  $timestamp = strtotime( $changeset_date );
2476                  if ( ! $timestamp ) {
2477                      wp_send_json_error( 'bad_customize_changeset_date', 400 );
2478                  }
2479                  $changeset_date_gmt = gmdate( 'Y-m-d H:i:s', $timestamp );
2480              }
2481          }
2482  
2483          $lock_user_id = null;
2484          $autosave     = ! empty( $_POST['customize_changeset_autosave'] );
2485          if ( ! $is_new_changeset ) {
2486              $lock_user_id = wp_check_post_lock( $this->changeset_post_id() );
2487          }
2488  
2489          // Force request to autosave when changeset is locked.
2490          if ( $lock_user_id && ! $autosave ) {
2491              $autosave           = true;
2492              $changeset_status   = null;
2493              $changeset_date_gmt = null;
2494          }
2495  
2496          if ( $autosave && ! defined( 'DOING_AUTOSAVE' ) ) { // Back-compat.
2497              define( 'DOING_AUTOSAVE', true );
2498          }
2499  
2500          $autosaved = false;
2501          $r         = $this->save_changeset_post(
2502              array(
2503                  'status'   => $changeset_status,
2504                  'title'    => $changeset_title,
2505                  'date_gmt' => $changeset_date_gmt,
2506                  'data'     => $input_changeset_data,
2507                  'autosave' => $autosave,
2508              )
2509          );
2510          if ( $autosave && ! is_wp_error( $r ) ) {
2511              $autosaved = true;
2512          }
2513  
2514          // If the changeset was locked and an autosave request wasn't itself an error, then now explicitly return with a failure.
2515          if ( $lock_user_id && ! is_wp_error( $r ) ) {
2516              $r = new WP_Error(
2517                  'changeset_locked',
2518                  __( 'Changeset is being edited by other user.' ),
2519                  array(
2520                      'lock_user' => $this->get_lock_user_data( $lock_user_id ),
2521                  )
2522              );
2523          }
2524  
2525          if ( is_wp_error( $r ) ) {
2526              $response = array(
2527                  'message' => $r->get_error_message(),
2528                  'code'    => $r->get_error_code(),
2529              );
2530              if ( is_array( $r->get_error_data() ) ) {
2531                  $response = array_merge( $response, $r->get_error_data() );
2532              } else {
2533                  $response['data'] = $r->get_error_data();
2534              }
2535          } else {
2536              $response       = $r;
2537              $changeset_post = get_post( $this->changeset_post_id() );
2538  
2539              // Dismiss all other auto-draft changeset posts for this user (they serve like autosave revisions), as there should only be one.
2540              if ( $is_new_changeset ) {
2541                  $this->dismiss_user_auto_draft_changesets();
2542              }
2543  
2544              // Note that if the changeset status was publish, then it will get set to trash if revisions are not supported.
2545              $response['changeset_status'] = $changeset_post->post_status;
2546              if ( $is_publish && 'trash' === $response['changeset_status'] ) {
2547                  $response['changeset_status'] = 'publish';
2548              }
2549  
2550              if ( 'publish' !== $response['changeset_status'] ) {
2551                  $this->set_changeset_lock( $changeset_post->ID );
2552              }
2553  
2554              if ( 'future' === $response['changeset_status'] ) {
2555                  $response['changeset_date'] = $changeset_post->post_date;
2556              }
2557  
2558              if ( 'publish' === $response['changeset_status'] || 'trash' === $response['changeset_status'] ) {
2559                  $response['next_changeset_uuid'] = wp_generate_uuid4();
2560              }
2561          }
2562  
2563          if ( $autosave ) {
2564              $response['autosaved'] = $autosaved;
2565          }
2566  
2567          if ( isset( $response['setting_validities'] ) ) {
2568              $response['setting_validities'] = array_map( array( $this, 'prepare_setting_validity_for_js' ), $response['setting_validities'] );
2569          }
2570  
2571          /**
2572           * Filters response data for a successful customize_save Ajax request.
2573           *
2574           * This filter does not apply if there was a nonce or authentication failure.
2575           *
2576           * @since 4.2.0
2577           *
2578           * @param array                $response Additional information passed back to the 'saved'
2579           *                                       event on `wp.customize`.
2580           * @param WP_Customize_Manager $this     WP_Customize_Manager instance.
2581           */
2582          $response = apply_filters( 'customize_save_response', $response, $this );
2583  
2584          if ( is_wp_error( $r ) ) {
2585              wp_send_json_error( $response );
2586          } else {
2587              wp_send_json_success( $response );
2588          }
2589      }
2590  
2591      /**
2592       * Save the post for the loaded changeset.
2593       *
2594       * @since 4.7.0
2595       *
2596       * @param array $args {
2597       *     Args for changeset post.
2598       *
2599       *     @type array  $data            Optional additional changeset data. Values will be merged on top of any existing post values.
2600       *     @type string $status          Post status. Optional. If supplied, the save will be transactional and a post revision will be allowed.
2601       *     @type string $title           Post title. Optional.
2602       *     @type string $date_gmt        Date in GMT. Optional.
2603       *     @type int    $user_id         ID for user who is saving the changeset. Optional, defaults to the current user ID.
2604       *     @type bool   $starter_content Whether the data is starter content. If false (default), then $starter_content will be cleared for any $data being saved.
2605       *     @type bool   $autosave        Whether this is a request to create an autosave revision.
2606       * }
2607       *
2608       * @return array|WP_Error Returns array on success and WP_Error with array data on error.
2609       */
2610  	function save_changeset_post( $args = array() ) {
2611  
2612          $args = array_merge(
2613              array(
2614                  'status'          => null,
2615                  'title'           => null,
2616                  'data'            => array(),
2617                  'date_gmt'        => null,
2618                  'user_id'         => get_current_user_id(),
2619                  'starter_content' => false,
2620                  'autosave'        => false,
2621              ),
2622              $args
2623          );
2624  
2625          $changeset_post_id       = $this->changeset_post_id();
2626          $existing_changeset_data = array();
2627          if ( $changeset_post_id ) {
2628              $existing_status = get_post_status( $changeset_post_id );
2629              if ( 'publish' === $existing_status || 'trash' === $existing_status ) {
2630                  return new WP_Error(
2631                      'changeset_already_published',
2632                      __( 'The previous set of changes has already been published. Please try saving your current set of changes again.' ),
2633                      array(
2634                          'next_changeset_uuid' => wp_generate_uuid4(),
2635                      )
2636                  );
2637              }
2638  
2639              $existing_changeset_data = $this->get_changeset_post_data( $changeset_post_id );
2640              if ( is_wp_error( $existing_changeset_data ) ) {
2641                  return $existing_changeset_data;
2642              }
2643          }
2644  
2645          // Fail if attempting to publish but publish hook is missing.
2646          if ( 'publish' === $args['status'] && false === has_action( 'transition_post_status', '_wp_customize_publish_changeset' ) ) {
2647              return new WP_Error( 'missing_publish_callback' );
2648          }
2649  
2650          // Validate date.
2651          $now = gmdate( 'Y-m-d H:i:59' );
2652          if ( $args['date_gmt'] ) {
2653              $is_future_dated = ( mysql2date( 'U', $args['date_gmt'], false ) > mysql2date( 'U', $now, false ) );
2654              if ( ! $is_future_dated ) {
2655                  return new WP_Error( 'not_future_date', __( 'You must supply a future date to schedule.' ) ); // Only future dates are allowed.
2656              }
2657  
2658              if ( ! $this->is_theme_active() && ( 'future' === $args['status'] || $is_future_dated ) ) {
2659                  return new WP_Error( 'cannot_schedule_theme_switches' ); // This should be allowed in the future, when theme is a regular setting.
2660              }
2661              $will_remain_auto_draft = ( ! $args['status'] && ( ! $changeset_post_id || 'auto-draft' === get_post_status( $changeset_post_id ) ) );
2662              if ( $will_remain_auto_draft ) {
2663                  return new WP_Error( 'cannot_supply_date_for_auto_draft_changeset' );
2664              }
2665          } elseif ( $changeset_post_id && 'future' === $args['status'] ) {
2666  
2667              // Fail if the new status is future but the existing post's date is not in the future.
2668              $changeset_post = get_post( $changeset_post_id );
2669              if ( mysql2date( 'U', $changeset_post->post_date_gmt, false ) <= mysql2date( 'U', $now, false ) ) {
2670                  return new WP_Error( 'not_future_date', __( 'You must supply a future date to schedule.' ) );
2671              }
2672          }
2673  
2674          if ( ! empty( $is_future_dated ) && 'publish' === $args['status'] ) {
2675              $args['status'] = 'future';
2676          }
2677  
2678          // Validate autosave param. See _wp_post_revision_fields() for why these fields are disallowed.
2679          if ( $args['autosave'] ) {
2680              if ( $args['date_gmt'] ) {
2681                  return new WP_Error( 'illegal_autosave_with_date_gmt' );
2682              } elseif ( $args['status'] ) {
2683                  return new WP_Error( 'illegal_autosave_with_status' );
2684              } elseif ( $args['user_id'] && get_current_user_id() !== $args['user_id'] ) {
2685                  return new WP_Error( 'illegal_autosave_with_non_current_user' );
2686              }
2687          }
2688  
2689          // The request was made via wp.customize.previewer.save().
2690          $update_transactionally = (bool) $args['status'];
2691          $allow_revision         = (bool) $args['status'];
2692  
2693          // Amend post values with any supplied data.
2694          foreach ( $args['data'] as $setting_id => $setting_params ) {
2695              if ( is_array( $setting_params ) && array_key_exists( 'value', $setting_params ) ) {
2696                  $this->set_post_value( $setting_id, $setting_params['value'] ); // Add to post values so that they can be validated and sanitized.
2697              }
2698          }
2699  
2700          // Note that in addition to post data, this will include any stashed theme mods.
2701          $post_values = $this->unsanitized_post_values(
2702              array(
2703                  'exclude_changeset' => true,
2704                  'exclude_post_data' => false,
2705              )
2706          );
2707          $this->add_dynamic_settings( array_keys( $post_values ) ); // Ensure settings get created even if they lack an input value.
2708  
2709          /*
2710           * Get list of IDs for settings that have values different from what is currently
2711           * saved in the changeset. By skipping any values that are already the same, the
2712           * subset of changed settings can be passed into validate_setting_values to prevent
2713           * an underprivileged modifying a single setting for which they have the capability
2714           * from being blocked from saving. This also prevents a user from touching of the
2715           * previous saved settings and overriding the associated user_id if they made no change.
2716           */
2717          $changed_setting_ids = array();
2718          foreach ( $post_values as $setting_id => $setting_value ) {
2719              $setting = $this->get_setting( $setting_id );
2720  
2721              if ( $setting && 'theme_mod' === $setting->type ) {
2722                  $prefixed_setting_id = $this->get_stylesheet() . '::' . $setting->id;
2723              } else {
2724                  $prefixed_setting_id = $setting_id;
2725              }
2726  
2727              $is_value_changed = (
2728                  ! isset( $existing_changeset_data[ $prefixed_setting_id ] )
2729                  ||
2730                  ! array_key_exists( 'value', $existing_changeset_data[ $prefixed_setting_id ] )
2731                  ||
2732                  $existing_changeset_data[ $prefixed_setting_id ]['value'] !== $setting_value
2733              );
2734              if ( $is_value_changed ) {
2735                  $changed_setting_ids[] = $setting_id;
2736              }
2737          }
2738  
2739          /**
2740           * Fires before save validation happens.
2741           *
2742           * Plugins can add just-in-time {@see 'customize_validate_{$this->ID}'} filters
2743           * at this point to catch any settings registered after `customize_register`.
2744           * The dynamic portion of the hook name, `$this->ID` refers to the setting ID.
2745           *
2746           * @since 4.6.0
2747           *
2748           * @param WP_Customize_Manager $this WP_Customize_Manager instance.
2749           */
2750          do_action( 'customize_save_validation_before', $this );
2751  
2752          // Validate settings.
2753          $validated_values      = array_merge(
2754              array_fill_keys( array_keys( $args['data'] ), null ), // Make sure existence/capability checks are done on value-less setting updates.
2755              $post_values
2756          );
2757          $setting_validities    = $this->validate_setting_values(
2758              $validated_values,
2759              array(
2760                  'validate_capability' => true,
2761                  'validate_existence'  => true,
2762              )
2763          );
2764          $invalid_setting_count = count( array_filter( $setting_validities, 'is_wp_error' ) );
2765  
2766          /*
2767           * Short-circuit if there are invalid settings the update is transactional.
2768           * A changeset update is transactional when a status is supplied in the request.
2769           */
2770          if ( $update_transactionally && $invalid_setting_count > 0 ) {
2771              $response = array(
2772                  'setting_validities' => $setting_validities,
2773                  /* translators: %s: Number of invalid settings. */
2774                  'message'            => sprintf( _n( 'Unable to save due to %s invalid setting.', 'Unable to save due to %s invalid settings.', $invalid_setting_count ), number_format_i18n( $invalid_setting_count ) ),
2775              );
2776              return new WP_Error( 'transaction_fail', '', $response );
2777          }
2778  
2779          // Obtain/merge data for changeset.
2780          $original_changeset_data = $this->get_changeset_post_data( $changeset_post_id );
2781          $data                    = $original_changeset_data;
2782          if ( is_wp_error( $data ) ) {
2783              $data = array();
2784          }
2785  
2786          // Ensure that all post values are included in the changeset data.
2787          foreach ( $post_values as $setting_id => $post_value ) {
2788              if ( ! isset( $args['data'][ $setting_id ] ) ) {
2789                  $args['data'][ $setting_id ] = array();
2790              }
2791              if ( ! isset( $args['data'][ $setting_id ]['value'] ) ) {
2792                  $args['data'][ $setting_id ]['value'] = $post_value;
2793              }
2794          }
2795  
2796          foreach ( $args['data'] as $setting_id => $setting_params ) {
2797              $setting = $this->get_setting( $setting_id );
2798              if ( ! $setting || ! $setting->check_capabilities() ) {
2799                  continue;
2800              }
2801  
2802              // Skip updating changeset for invalid setting values.
2803              if ( isset( $setting_validities[ $setting_id ] ) && is_wp_error( $setting_validities[ $setting_id ] ) ) {
2804                  continue;
2805              }
2806  
2807              $changeset_setting_id = $setting_id;
2808              if ( 'theme_mod' === $setting->type ) {
2809                  $changeset_setting_id = sprintf( '%s::%s', $this->get_stylesheet(), $setting_id );
2810              }
2811  
2812              if ( null === $setting_params ) {
2813                  // Remove setting from changeset entirely.
2814                  unset( $data[ $changeset_setting_id ] );
2815              } else {
2816  
2817                  if ( ! isset( $data[ $changeset_setting_id ] ) ) {
2818                      $data[ $changeset_setting_id ] = array();
2819                  }
2820  
2821                  // Merge any additional setting params that have been supplied with the existing params.
2822                  $merged_setting_params = array_merge( $data[ $changeset_setting_id ], $setting_params );
2823  
2824                  // Skip updating setting params if unchanged (ensuring the user_id is not overwritten).
2825                  if ( $data[ $changeset_setting_id ] === $merged_setting_params ) {
2826                      continue;
2827                  }
2828  
2829                  $data[ $changeset_setting_id ] = array_merge(
2830                      $merged_setting_params,
2831                      array(
2832                          'type'              => $setting->type,
2833                          'user_id'           => $args['user_id'],
2834                          'date_modified_gmt' => current_time( 'mysql', true ),
2835                      )
2836                  );
2837  
2838                  // Clear starter_content flag in data if changeset is not explicitly being updated for starter content.
2839                  if ( empty( $args['starter_content'] ) ) {
2840                      unset( $data[ $changeset_setting_id ]['starter_content'] );
2841                  }
2842              }
2843          }
2844  
2845          $filter_context = array(
2846              'uuid'          => $this->changeset_uuid(),
2847              'title'         => $args['title'],
2848              'status'        => $args['status'],
2849              'date_gmt'      => $args['date_gmt'],
2850              'post_id'       => $changeset_post_id,
2851              'previous_data' => is_wp_error( $original_changeset_data ) ? array() : $original_changeset_data,
2852              'manager'       => $this,
2853          );
2854  
2855          /**
2856           * Filters the settings' data that will be persisted into the changeset.
2857           *
2858           * Plugins may amend additional data (such as additional meta for settings) into the changeset with this filter.
2859           *
2860           * @since 4.7.0
2861           *
2862           * @param array $data Updated changeset data, mapping setting IDs to arrays containing a $value item and optionally other metadata.
2863           * @param array $context {
2864           *     Filter context.
2865           *
2866           *     @type string               $uuid          Changeset UUID.
2867           *     @type string               $title         Requested title for the changeset post.
2868           *     @type string               $status        Requested status for the changeset post.
2869           *     @type string               $date_gmt      Requested date for the changeset post in MySQL format and GMT timezone.
2870           *     @type int|false            $post_id       Post ID for the changeset, or false if it doesn't exist yet.
2871           *     @type array                $previous_data Previous data contained in the changeset.
2872           *     @type WP_Customize_Manager $manager       Manager instance.
2873           * }
2874           */
2875          $data = apply_filters( 'customize_changeset_save_data', $data, $filter_context );
2876  
2877          // Switch theme if publishing changes now.
2878          if ( 'publish' === $args['status'] && ! $this->is_theme_active() ) {
2879              // Temporarily stop previewing the theme to allow switch_themes() to operate properly.
2880              $this->stop_previewing_theme();
2881              switch_theme( $this->get_stylesheet() );
2882              update_option( 'theme_switched_via_customizer', true );
2883              $this->start_previewing_theme();
2884          }
2885  
2886          // Gather the data for wp_insert_post()/wp_update_post().
2887          $post_array = array(
2888              // JSON_UNESCAPED_SLASHES is only to improve readability as slashes needn't be escaped in storage.
2889              'post_content' => wp_json_encode( $data, JSON_UNESCAPED_SLASHES | JSON_PRETTY_PRINT ),
2890          );
2891          if ( $args['title'] ) {
2892              $post_array['post_title'] = $args['title'];
2893          }
2894          if ( $changeset_post_id ) {
2895              $post_array['ID'] = $changeset_post_id;
2896          } else {
2897              $post_array['post_type']   = 'customize_changeset';
2898              $post_array['post_name']   = $this->changeset_uuid();
2899              $post_array['post_status'] = 'auto-draft';
2900          }
2901          if ( $args['status'] ) {
2902              $post_array['post_status'] = $args['status'];
2903          }
2904  
2905          // Reset post date to now if we are publishing, otherwise pass post_date_gmt and translate for post_date.
2906          if ( 'publish' === $args['status'] ) {
2907              $post_array['post_date_gmt'] = '0000-00-00 00:00:00';
2908              $post_array['post_date']     = '0000-00-00 00:00:00';
2909          } elseif ( $args['date_gmt'] ) {
2910              $post_array['post_date_gmt'] = $args['date_gmt'];
2911              $post_array['post_date']     = get_date_from_gmt( $args['date_gmt'] );
2912          } elseif ( $changeset_post_id && 'auto-draft' === get_post_status( $changeset_post_id ) ) {
2913              /*
2914               * Keep bumping the date for the auto-draft whenever it is modified;
2915               * this extends its life, preserving it from garbage-collection via
2916               * wp_delete_auto_drafts().
2917               */
2918              $post_array['post_date']     = current_time( 'mysql' );
2919              $post_array['post_date_gmt'] = '';
2920          }
2921  
2922          $this->store_changeset_revision = $allow_revision;
2923          add_filter( 'wp_save_post_revision_post_has_changed', array( $this, '_filter_revision_post_has_changed' ), 5, 3 );
2924  
2925          /*
2926           * Update the changeset post. The publish_customize_changeset action
2927           * will cause the settings in the changeset to be saved via
2928           * WP_Customize_Setting::save().
2929           */
2930  
2931          // Prevent content filters from corrupting JSON in post_content.
2932          $has_kses = ( false !== has_filter( 'content_save_pre', 'wp_filter_post_kses' ) );
2933          if ( $has_kses ) {
2934              kses_remove_filters();
2935          }
2936          $has_targeted_link_rel_filters = ( false !== has_filter( 'content_save_pre', 'wp_targeted_link_rel' ) );
2937          if ( $has_targeted_link_rel_filters ) {
2938              wp_remove_targeted_link_rel_filters();
2939          }
2940  
2941          // Note that updating a post with publish status will trigger WP_Customize_Manager::publish_changeset_values().
2942          if ( $changeset_post_id ) {
2943              if ( $args['autosave'] && 'auto-draft' !== get_post_status( $changeset_post_id ) ) {
2944                  // See _wp_translate_postdata() for why this is required as it will use the edit_post meta capability.
2945                  add_filter( 'map_meta_cap', array( $this, 'grant_edit_post_capability_for_changeset' ), 10, 4 );
2946                  $post_array['post_ID']   = $post_array['ID'];
2947                  $post_array['post_type'] = 'customize_changeset';
2948                  $r                       = wp_create_post_autosave( wp_slash( $post_array ) );
2949                  remove_filter( 'map_meta_cap', array( $this, 'grant_edit_post_capability_for_changeset' ), 10 );
2950              } else {
2951                  $post_array['edit_date'] = true; // Prevent date clearing.
2952                  $r                       = wp_update_post( wp_slash( $post_array ), true );
2953  
2954                  // Delete autosave revision for user when the changeset is updated.
2955                  if ( ! empty( $args['user_id'] ) ) {
2956                      $autosave_draft = wp_get_post_autosave( $changeset_post_id, $args['user_id'] );
2957                      if ( $autosave_draft ) {
2958                          wp_delete_post( $autosave_draft->ID, true );
2959                      }
2960                  }
2961              }
2962          } else {
2963              $r = wp_insert_post( wp_slash( $post_array ), true );
2964              if ( ! is_wp_error( $r ) ) {
2965                  $this->_changeset_post_id = $r; // Update cached post ID for the loaded changeset.
2966              }
2967          }
2968  
2969          // Restore removed content filters.
2970          if ( $has_kses ) {
2971              kses_init_filters();
2972          }
2973          if ( $has_targeted_link_rel_filters ) {
2974              wp_init_targeted_link_rel_filters();
2975          }
2976  
2977          $this->_changeset_data = null; // Reset so WP_Customize_Manager::changeset_data() will re-populate with updated contents.
2978  
2979          remove_filter( 'wp_save_post_revision_post_has_changed', array( $this, '_filter_revision_post_has_changed' ) );
2980  
2981          $response = array(
2982              'setting_validities' => $setting_validities,
2983          );
2984  
2985          if ( is_wp_error( $r ) ) {
2986              $response['changeset_post_save_failure'] = $r->get_error_code();
2987              return new WP_Error( 'changeset_post_save_failure', '', $response );
2988          }
2989  
2990          return $response;
2991      }
2992  
2993      /**
2994       * Trash or delete a changeset post.
2995       *
2996       * The following re-formulates the logic from `wp_trash_post()` as done in
2997       * `wp_publish_post()`. The reason for bypassing `wp_trash_post()` is that it
2998       * will mutate the the `post_content` and the `post_name` when they should be
2999       * untouched.
3000       *
3001       * @since 4.9.0
3002       * @global wpdb $wpdb WordPress database abstraction object.
3003       * @see wp_trash_post()
3004       *
3005       * @param int|WP_Post $post The changeset post.
3006       * @return mixed A WP_Post object for the trashed post or an empty value on failure.
3007       */
3008  	public function trash_changeset_post( $post ) {
3009          global $wpdb;
3010  
3011          $post = get_post( $post );
3012  
3013          if ( ! ( $post instanceof WP_Post ) ) {
3014              return $post;
3015          }
3016          $post_id = $post->ID;
3017  
3018          if ( ! EMPTY_TRASH_DAYS ) {
3019              return wp_delete_post( $post_id, true );
3020          }
3021  
3022          if ( 'trash' === get_post_status( $post ) ) {
3023              return false;
3024          }
3025  
3026          /** This filter is documented in wp-includes/post.php */
3027          $check = apply_filters( 'pre_trash_post', null, $post );
3028          if ( null !== $check ) {
3029              return $check;
3030          }
3031  
3032          /** This action is documented in wp-includes/post.php */
3033          do_action( 'wp_trash_post', $post_id );
3034  
3035          add_post_meta( $post_id, '_wp_trash_meta_status', $post->post_status );
3036          add_post_meta( $post_id, '_wp_trash_meta_time', time() );
3037  
3038          $old_status = $post->post_status;
3039          $new_status = 'trash';
3040          $wpdb->update( $wpdb->posts, array( 'post_status' => $new_status ), array( 'ID' => $post->ID ) );
3041          clean_post_cache( $post->ID );
3042  
3043          $post->post_status = $new_status;
3044          wp_transition_post_status( $new_status, $old_status, $post );
3045  
3046          /** This action is documented in wp-includes/post.php */
3047          do_action( "edit_post_{$post->post_type}", $post->ID, $post );
3048  
3049          /** This action is documented in wp-includes/post.php */
3050          do_action( 'edit_post', $post->ID, $post );
3051  
3052          /** This action is documented in wp-includes/post.php */
3053          do_action( "save_post_{$post->post_type}", $post->ID, $post, true );
3054  
3055          /** This action is documented in wp-includes/post.php */
3056          do_action( 'save_post', $post->ID, $post, true );
3057  
3058          /** This action is documented in wp-includes/post.php */
3059          do_action( 'wp_insert_post', $post->ID, $post, true );
3060  
3061          wp_trash_post_comments( $post_id );
3062  
3063          /** This action is documented in wp-includes/post.php */
3064          do_action( 'trashed_post', $post_id );
3065  
3066          return $post;
3067      }
3068  
3069      /**
3070       * Handle request to trash a changeset.
3071       *
3072       * @since 4.9.0
3073       */
3074  	public function handle_changeset_trash_request() {
3075          if ( ! is_user_logged_in() ) {
3076              wp_send_json_error( 'unauthenticated' );
3077          }
3078  
3079          if ( ! $this->is_preview() ) {
3080              wp_send_json_error( 'not_preview' );
3081          }
3082  
3083          if ( ! check_ajax_referer( 'trash_customize_changeset', 'nonce', false ) ) {
3084              wp_send_json_error(
3085                  array(
3086                      'code'    => 'invalid_nonce',
3087                      'message' => __( 'There was an authentication problem. Please reload and try again.' ),
3088                  )
3089              );
3090          }
3091  
3092          $changeset_post_id = $this->changeset_post_id();
3093  
3094          if ( ! $changeset_post_id ) {
3095              wp_send_json_error(
3096                  array(
3097                      'message' => __( 'No changes saved yet, so there is nothing to trash.' ),
3098                      'code'    => 'non_existent_changeset',
3099                  )
3100              );
3101              return;
3102          }
3103  
3104          if ( $changeset_post_id && ! current_user_can( get_post_type_object( 'customize_changeset' )->cap->delete_post, $changeset_post_id ) ) {
3105              wp_send_json_error(
3106                  array(
3107                      'code'    => 'changeset_trash_unauthorized',
3108                      'message' => __( 'Unable to trash changes.' ),
3109                  )
3110              );
3111          }
3112  
3113          if ( 'trash' === get_post_status( $changeset_post_id ) ) {
3114              wp_send_json_error(
3115                  array(
3116                      'message' => __( 'Changes have already been trashed.' ),
3117                      'code'    => 'changeset_already_trashed',
3118                  )
3119              );
3120              return;
3121          }
3122  
3123          $r = $this->trash_changeset_post( $changeset_post_id );
3124          if ( ! ( $r instanceof WP_Post ) ) {
3125              wp_send_json_error(
3126                  array(
3127                      'code'    => 'changeset_trash_failure',
3128                      'message' => __( 'Unable to trash changes.' ),
3129                  )
3130              );
3131          }
3132  
3133          wp_send_json_success(
3134              array(
3135                  'message' => __( 'Changes trashed successfully.' ),
3136              )
3137          );
3138      }
3139  
3140      /**
3141       * Re-map 'edit_post' meta cap for a customize_changeset post to be the same as 'customize' maps.
3142       *
3143       * There is essentially a "meta meta" cap in play here, where 'edit_post' meta cap maps to
3144       * the 'customize' meta cap which then maps to 'edit_theme_options'. This is currently
3145       * required in core for `wp_create_post_autosave()` because it will call
3146       * `_wp_translate_postdata()` which in turn will check if a user can 'edit_post', but the
3147       * the caps for the customize_changeset post type are all mapping to the meta capability.
3148       * This should be able to be removed once #40922 is addressed in core.
3149       *
3150       * @since 4.9.0
3151       * @link https://core.trac.wordpress.org/ticket/40922
3152       * @see WP_Customize_Manager::save_changeset_post()
3153       * @see _wp_translate_postdata()
3154       *
3155       * @param string[] $caps    Array of the user's capabilities.
3156       * @param string   $cap     Capability name.
3157       * @param int      $user_id The user ID.
3158       * @param array    $args    Adds the context to the cap. Typically the object ID.
3159       * @return array   Capabilities.
3160       */
3161  	public function grant_edit_post_capability_for_changeset( $caps, $cap, $user_id, $args ) {
3162          if ( 'edit_post' === $cap && ! empty( $args[0] ) && 'customize_changeset' === get_post_type( $args[0] ) ) {
3163              $post_type_obj = get_post_type_object( 'customize_changeset' );
3164              $caps          = map_meta_cap( $post_type_obj->cap->$cap, $user_id );
3165          }
3166          return $caps;
3167      }
3168  
3169      /**
3170       * Marks the changeset post as being currently edited by the current user.
3171       *
3172       * @since 4.9.0
3173       *
3174       * @param int  $changeset_post_id Changeset post id.
3175       * @param bool $take_over Take over the changeset, default is false.
3176       */
3177  	public function set_changeset_lock( $changeset_post_id, $take_over = false ) {
3178          if ( $changeset_post_id ) {
3179              $can_override = ! (bool) get_post_meta( $changeset_post_id, '_edit_lock', true );
3180  
3181              if ( $take_over ) {
3182                  $can_override = true;
3183              }
3184  
3185              if ( $can_override ) {
3186                  $lock = sprintf( '%s:%s', time(), get_current_user_id() );
3187                  update_post_meta( $changeset_post_id, '_edit_lock', $lock );
3188              } else {
3189                  $this->refresh_changeset_lock( $changeset_post_id );
3190              }
3191          }
3192      }
3193  
3194      /**
3195       * Refreshes changeset lock with the current time if current user edited the changeset before.
3196       *
3197       * @since 4.9.0
3198       *
3199       * @param int $changeset_post_id Changeset post id.
3200       */
3201  	public function refresh_changeset_lock( $changeset_post_id ) {
3202          if ( ! $changeset_post_id ) {
3203              return;
3204          }
3205          $lock = get_post_meta( $changeset_post_id, '_edit_lock', true );
3206          $lock = explode( ':', $lock );
3207  
3208          if ( $lock && ! empty( $lock[1] ) ) {
3209              $user_id         = intval( $lock[1] );
3210              $current_user_id = get_current_user_id();
3211              if ( $user_id === $current_user_id ) {
3212                  $lock = sprintf( '%s:%s', time(), $user_id );
3213                  update_post_meta( $changeset_post_id, '_edit_lock', $lock );
3214              }
3215          }
3216      }
3217  
3218      /**
3219       * Filter heartbeat settings for the Customizer.
3220       *
3221       * @since 4.9.0
3222       * @param array $settings Current settings to filter.
3223       * @return array Heartbeat settings.
3224       */
3225  	public function add_customize_screen_to_heartbeat_settings( $settings ) {
3226          global $pagenow;
3227          if ( 'customize.php' === $pagenow ) {
3228              $settings['screenId'] = 'customize';
3229          }
3230          return $settings;
3231      }
3232  
3233      /**
3234       * Get lock user data.
3235       *
3236       * @since 4.9.0
3237       *
3238       * @param int $user_id User ID.
3239       * @return array|null User data formatted for client.
3240       */
3241  	protected function get_lock_user_data( $user_id ) {
3242          if ( ! $user_id ) {
3243              return null;
3244          }
3245          $lock_user = get_userdata( $user_id );
3246          if ( ! $lock_user ) {
3247              return null;
3248          }
3249          return array(
3250              'id'     => $lock_user->ID,
3251              'name'   => $lock_user->display_name,
3252              'avatar' => get_avatar_url( $lock_user->ID, array( 'size' => 128 ) ),
3253          );
3254      }
3255  
3256      /**
3257       * Check locked changeset with heartbeat API.
3258       *
3259       * @since 4.9.0
3260       *
3261       * @param array  $response  The Heartbeat response.
3262       * @param array  $data      The $_POST data sent.
3263       * @param string $screen_id The screen id.
3264       * @return array The Heartbeat response.
3265       */
3266  	public function check_changeset_lock_with_heartbeat( $response, $data, $screen_id ) {
3267          if ( isset( $data['changeset_uuid'] ) ) {
3268              $changeset_post_id = $this->find_changeset_post_id( $data['changeset_uuid'] );
3269          } else {
3270              $changeset_post_id = $this->changeset_post_id();
3271          }
3272  
3273          if (
3274              array_key_exists( 'check_changeset_lock', $data )
3275              && 'customize' === $screen_id
3276              && $changeset_post_id
3277              && current_user_can( get_post_type_object( 'customize_changeset' )->cap->edit_post, $changeset_post_id )
3278          ) {
3279              $lock_user_id = wp_check_post_lock( $changeset_post_id );
3280  
3281              if ( $lock_user_id ) {
3282                  $response['customize_changeset_lock_user'] = $this->get_lock_user_data( $lock_user_id );
3283              } else {
3284  
3285                  // Refreshing time will ensure that the user is sitting on customizer and has not closed the customizer tab.
3286                  $this->refresh_changeset_lock( $changeset_post_id );
3287              }
3288          }
3289  
3290          return $response;
3291      }
3292  
3293      /**
3294       * Removes changeset lock when take over request is sent via Ajax.
3295       *
3296       * @since 4.9.0
3297       */
3298  	public function handle_override_changeset_lock_request() {
3299          if ( ! $this->is_preview() ) {
3300              wp_send_json_error( 'not_preview', 400 );
3301          }
3302  
3303          if ( ! check_ajax_referer( 'customize_override_changeset_lock', 'nonce', false ) ) {
3304              wp_send_json_error(
3305                  array(
3306                      'code'    => 'invalid_nonce',
3307                      'message' => __( 'Security check failed.' ),
3308                  )
3309              );
3310          }
3311  
3312          $changeset_post_id = $this->changeset_post_id();
3313  
3314          if ( empty( $changeset_post_id ) ) {
3315              wp_send_json_error(
3316                  array(
3317                      'code'    => 'no_changeset_found_to_take_over',
3318                      'message' => __( 'No changeset found to take over' ),
3319                  )
3320              );
3321          }
3322  
3323          if ( ! current_user_can( get_post_type_object( 'customize_changeset' )->cap->edit_post, $changeset_post_id ) ) {
3324              wp_send_json_error(
3325                  array(
3326                      'code'    => 'cannot_remove_changeset_lock',
3327                      'message' => __( 'Sorry, you are not allowed to take over.' ),
3328                  )
3329              );
3330          }
3331  
3332          $this->set_changeset_lock( $changeset_post_id, true );
3333  
3334          wp_send_json_success( 'changeset_taken_over' );
3335      }
3336  
3337      /**
3338       * Whether a changeset revision should be made.
3339       *
3340       * @since 4.7.0
3341       * @var bool
3342       */
3343      protected $store_changeset_revision;
3344  
3345      /**
3346       * Filters whether a changeset has changed to create a new revision.
3347       *
3348       * Note that this will not be called while a changeset post remains in auto-draft status.
3349       *
3350       * @since 4.7.0
3351       *
3352       * @param bool    $post_has_changed Whether the post has changed.
3353       * @param WP_Post $last_revision    The last revision post object.
3354       * @param WP_Post $post             The post object.
3355       *
3356       * @return bool Whether a revision should be made.
3357       */
3358  	public function _filter_revision_post_has_changed( $post_has_changed, $last_revision, $post ) {
3359          unset( $last_revision );
3360          if ( 'customize_changeset' === $post->post_type ) {
3361              $post_has_changed = $this->store_changeset_revision;
3362          }
3363          return $post_has_changed;
3364      }
3365  
3366      /**
3367       * Publish changeset values.
3368       *
3369       * This will the values contained in a changeset, even changesets that do not
3370       * correspond to current manager instance. This is called by
3371       * `_wp_customize_publish_changeset()` when a customize_changeset post is
3372       * transitioned to the `publish` status. As such, this method should not be
3373       * called directly and instead `wp_publish_post()` should be used.
3374       *
3375       * Please note that if the settings in the changeset are for a non-activated
3376       * theme, the theme must first be switched to (via `switch_theme()`) before
3377       * invoking this method.
3378       *
3379       * @since 4.7.0
3380       * @see _wp_customize_publish_changeset()
3381       * @global wpdb $wpdb WordPress database abstraction object.
3382       *
3383       * @param int $changeset_post_id ID for customize_changeset post. Defaults to the changeset for the current manager instance.
3384       * @return true|WP_Error True or error info.
3385       */
3386  	public function _publish_changeset_values( $changeset_post_id ) {
3387          global $wpdb;
3388  
3389          $publishing_changeset_data = $this->get_changeset_post_data( $changeset_post_id );
3390          if ( is_wp_error( $publishing_changeset_data ) ) {
3391              return $publishing_changeset_data;
3392          }
3393  
3394          $changeset_post = get_post( $changeset_post_id );
3395  
3396          /*
3397           * Temporarily override the changeset context so that it will be read
3398           * in calls to unsanitized_post_values() and so that it will be available
3399           * on the $wp_customize object passed to hooks during the save logic.
3400           */
3401          $previous_changeset_post_id = $this->_changeset_post_id;
3402          $this->_changeset_post_id   = $changeset_post_id;
3403          $previous_changeset_uuid    = $this->_changeset_uuid;
3404          $this->_changeset_uuid      = $changeset_post->post_name;
3405          $previous_changeset_data    = $this->_changeset_data;
3406          $this->_changeset_data      = $publishing_changeset_data;
3407  
3408          // Parse changeset data to identify theme mod settings and user IDs associated with settings to be saved.
3409          $setting_user_ids   = array();
3410          $theme_mod_settings = array();
3411          $namespace_pattern  = '/^(?P<stylesheet>.+?)::(?P<setting_id>.+)$/';
3412          $matches            = array();
3413          foreach ( $this->_changeset_data as $raw_setting_id => $setting_params ) {
3414              $actual_setting_id    = null;
3415              $is_theme_mod_setting = (
3416                  isset( $setting_params['value'] )
3417                  &&
3418                  isset( $setting_params['type'] )
3419                  &&
3420                  'theme_mod' === $setting_params['type']
3421                  &&
3422                  preg_match( $namespace_pattern, $raw_setting_id, $matches )
3423              );
3424              if ( $is_theme_mod_setting ) {
3425                  if ( ! isset( $theme_mod_settings[ $matches['stylesheet'] ] ) ) {
3426                      $theme_mod_settings[ $matches['stylesheet'] ] = array();
3427                  }
3428                  $theme_mod_settings[ $matches['stylesheet'] ][ $matches['setting_id'] ] = $setting_params;
3429  
3430                  if ( $this->get_stylesheet() === $matches['stylesheet'] ) {
3431                      $actual_setting_id = $matches['setting_id'];
3432                  }
3433              } else {
3434                  $actual_setting_id = $raw_setting_id;
3435              }
3436  
3437              // Keep track of the user IDs for settings actually for this theme.
3438              if ( $actual_setting_id && isset( $setting_params['user_id'] ) ) {
3439                  $setting_user_ids[ $actual_setting_id ] = $setting_params['user_id'];
3440              }
3441          }
3442  
3443          $changeset_setting_values = $this->unsanitized_post_values(
3444              array(
3445                  'exclude_post_data' => true,
3446                  'exclude_changeset' => false,
3447              )
3448          );
3449          $changeset_setting_ids    = array_keys( $changeset_setting_values );
3450          $this->add_dynamic_settings( $changeset_setting_ids );
3451  
3452          /**
3453           * Fires once the theme has switched in the Customizer, but before settings
3454           * have been saved.
3455           *
3456           * @since 3.4.0
3457           *
3458           * @param WP_Customize_Manager $manager WP_Customize_Manager instance.
3459           */
3460          do_action( 'customize_save', $this );
3461  
3462          /*
3463           * Ensure that all settings will allow themselves to be saved. Note that
3464           * this is safe because the setting would have checked the capability
3465           * when the setting value was written into the changeset. So this is why
3466           * an additional capability check is not required here.
3467           */
3468          $original_setting_capabilities = array();
3469          foreach ( $changeset_setting_ids as $setting_id ) {
3470              $setting = $this->get_setting( $setting_id );
3471              if ( $setting && ! isset( $setting_user_ids[ $setting_id ] ) ) {
3472                  $original_setting_capabilities[ $setting->id ] = $setting->capability;
3473                  $setting->capability                           = 'exist';
3474              }
3475          }
3476  
3477          $original_user_id = get_current_user_id();
3478          foreach ( $changeset_setting_ids as $setting_id ) {
3479              $setting = $this->get_setting( $setting_id );
3480              if ( $setting ) {
3481                  /*
3482                   * Set the current user to match the user who saved the value into
3483                   * the changeset so that any filters that apply during the save
3484                   * process will respect the original user's capabilities. This
3485                   * will ensure, for example, that KSES won't strip unsafe HTML
3486                   * when a scheduled changeset publishes via WP Cron.
3487                   */
3488                  if ( isset( $setting_user_ids[ $setting_id ] ) ) {
3489                      wp_set_current_user( $setting_user_ids[ $setting_id ] );
3490                  } else {
3491                      wp_set_current_user( $original_user_id );
3492                  }
3493  
3494                  $setting->save();
3495              }
3496          }
3497          wp_set_current_user( $original_user_id );
3498  
3499          // Update the stashed theme mod settings, removing the active theme's stashed settings, if activated.
3500          if ( did_action( 'switch_theme' ) ) {
3501              $other_theme_mod_settings = $theme_mod_settings;
3502              unset( $other_theme_mod_settings[ $this->get_stylesheet() ] );
3503              $this->update_stashed_theme_mod_settings( $other_theme_mod_settings );
3504          }
3505  
3506          /**
3507           * Fires after Customize settings have been saved.
3508           *
3509           * @since 3.6.0
3510           *
3511           * @param WP_Customize_Manager $manager WP_Customize_Manager instance.
3512           */
3513          do_action( 'customize_save_after', $this );
3514  
3515          // Restore original capabilities.
3516          foreach ( $original_setting_capabilities as $setting_id => $capability ) {
3517              $setting = $this->get_setting( $setting_id );
3518              if ( $setting ) {
3519                  $setting->capability = $capability;
3520              }
3521          }
3522  
3523          // Restore original changeset data.
3524          $this->_changeset_data    = $previous_changeset_data;
3525          $this->_changeset_post_id = $previous_changeset_post_id;
3526          $this->_changeset_uuid    = $previous_changeset_uuid;
3527  
3528          /*
3529           * Convert all autosave revisions into their own auto-drafts so that users can be prompted to
3530           * restore them when a changeset is published, but they had been locked out from including
3531           * their changes in the changeset.
3532           */
3533          $revisions = wp_get_post_revisions( $changeset_post_id, array( 'check_enabled' => false ) );
3534          foreach ( $revisions as $revision ) {
3535              if ( false !== strpos( $revision->post_name, "{$changeset_post_id}-autosave" ) ) {
3536                  $wpdb->update(
3537                      $wpdb->posts,
3538                      array(
3539                          'post_status' => 'auto-draft',
3540                          'post_type'   => 'customize_changeset',
3541                          'post_name'   => wp_generate_uuid4(),
3542                          'post_parent' => 0,
3543                      ),
3544                      array(
3545                          'ID' => $revision->ID,
3546                      )
3547                  );
3548                  clean_post_cache( $revision->ID );
3549              }
3550          }
3551  
3552          return true;
3553      }
3554  
3555      /**
3556       * Update stashed theme mod settings.
3557       *
3558       * @since 4.7.0
3559       *
3560       * @param array $inactive_theme_mod_settings Mapping of stylesheet to arrays of theme mod settings.
3561       * @return array|false Returns array of updated stashed theme mods or false if the update failed or there were no changes.
3562       */
3563  	protected function update_stashed_theme_mod_settings( $inactive_theme_mod_settings ) {
3564          $stashed_theme_mod_settings = get_option( 'customize_stashed_theme_mods' );
3565          if ( empty( $stashed_theme_mod_settings ) ) {
3566              $stashed_theme_mod_settings = array();
3567          }
3568  
3569          // Delete any stashed theme mods for the active theme since they would have been loaded and saved upon activation.
3570          unset( $stashed_theme_mod_settings[ $this->get_stylesheet() ] );
3571  
3572          // Merge inactive theme mods with the stashed theme mod settings.
3573          foreach ( $inactive_theme_mod_settings as $stylesheet => $theme_mod_settings ) {
3574              if ( ! isset( $stashed_theme_mod_settings[ $stylesheet ] ) ) {
3575                  $stashed_theme_mod_settings[ $stylesheet ] = array();
3576              }
3577  
3578              $stashed_theme_mod_settings[ $stylesheet ] = array_merge(
3579                  $stashed_theme_mod_settings[ $stylesheet ],
3580                  $theme_mod_settings
3581              );
3582          }
3583  
3584          $autoload = false;
3585          $result   = update_option( 'customize_stashed_theme_mods', $stashed_theme_mod_settings, $autoload );
3586          if ( ! $result ) {
3587              return false;
3588          }
3589          return $stashed_theme_mod_settings;
3590      }
3591  
3592      /**
3593       * Refresh nonces for the current preview.
3594       *
3595       * @since 4.2.0
3596       */
3597  	public function refresh_nonces() {
3598          if ( ! $this->is_preview() ) {
3599              wp_send_json_error( 'not_preview' );
3600          }
3601  
3602          wp_send_json_success( $this->get_nonces() );
3603      }
3604  
3605      /**
3606       * Delete a given auto-draft changeset or the autosave revision for a given changeset or delete changeset lock.
3607       *
3608       * @since 4.9.0
3609       */
3610  	public function handle_dismiss_autosave_or_lock_request() {
3611          // Calls to dismiss_user_auto_draft_changesets() and wp_get_post_autosave() require non-zero get_current_user_id().
3612          if ( ! is_user_logged_in() ) {
3613              wp_send_json_error( 'unauthenticated', 401 );
3614          }
3615  
3616          if ( ! $this->is_preview() ) {
3617              wp_send_json_error( 'not_preview', 400 );
3618          }
3619  
3620          if ( ! check_ajax_referer( 'customize_dismiss_autosave_or_lock', 'nonce', false ) ) {
3621              wp_send_json_error( 'invalid_nonce', 403 );
3622          }
3623  
3624          $changeset_post_id = $this->changeset_post_id();
3625          $dismiss_lock      = ! empty( $_POST['dismiss_lock'] );
3626          $dismiss_autosave  = ! empty( $_POST['dismiss_autosave'] );
3627  
3628          if ( $dismiss_lock ) {
3629              if ( empty( $changeset_post_id ) && ! $dismiss_autosave ) {
3630                  wp_send_json_error( 'no_changeset_to_dismiss_lock', 404 );
3631              }
3632              if ( ! current_user_can( get_post_type_object( 'customize_changeset' )->cap->edit_post, $changeset_post_id ) && ! $dismiss_autosave ) {
3633                  wp_send_json_error( 'cannot_remove_changeset_lock', 403 );
3634              }
3635  
3636              delete_post_meta( $changeset_post_id, '_edit_lock' );
3637  
3638              if ( ! $dismiss_autosave ) {
3639                  wp_send_json_success( 'changeset_lock_dismissed' );
3640              }
3641          }
3642  
3643          if ( $dismiss_autosave ) {
3644              if ( empty( $changeset_post_id ) || 'auto-draft' === get_post_status( $changeset_post_id ) ) {
3645                  $dismissed = $this->dismiss_user_auto_draft_changesets();
3646                  if ( $dismissed > 0 ) {
3647                      wp_send_json_success( 'auto_draft_dismissed' );
3648                  } else {
3649                      wp_send_json_error( 'no_auto_draft_to_delete', 404 );
3650                  }
3651              } else {
3652                  $revision = wp_get_post_autosave( $changeset_post_id, get_current_user_id() );
3653  
3654                  if ( $revision ) {
3655                      if ( ! current_user_can( get_post_type_object( 'customize_changeset' )->cap->delete_post, $changeset_post_id ) ) {
3656                          wp_send_json_error( 'cannot_delete_autosave_revision', 403 );
3657                      }
3658  
3659                      if ( ! wp_delete_post( $revision->ID, true ) ) {
3660                          wp_send_json_error( 'autosave_revision_deletion_failure', 500 );
3661                      } else {
3662                          wp_send_json_success( 'autosave_revision_deleted' );
3663                      }
3664                  } else {
3665                      wp_send_json_error( 'no_autosave_revision_to_delete', 404 );
3666                  }
3667              }
3668          }
3669  
3670          wp_send_json_error( 'unknown_error', 500 );
3671      }
3672  
3673      /**
3674       * Add a customize setting.
3675       *
3676       * @since 3.4.0
3677       * @since 4.5.0 Return added WP_Customize_Setting instance.
3678       *
3679       * @param WP_Customize_Setting|string $id   Customize Setting object, or ID.
3680       * @param array                       $args {
3681       *  Optional. Array of properties for the new WP_Customize_Setting. Default empty array.
3682       *
3683       *  @type string       $type                  Type of the setting. Default 'theme_mod'.
3684       *  @type string       $capability            Capability required for the setting. Default 'edit_theme_options'
3685       *  @type string|array $theme_supports        Theme features required to support the panel. Default is none.
3686       *  @type string       $default               Default value for the setting. Default is empty string.
3687       *  @type string       $transport             Options for rendering the live preview of changes in Customizer.
3688       *                                            Using 'refresh' makes the change visible by reloading the whole preview.
3689       *                                            Using 'postMessage' allows a custom JavaScript to handle live changes.
3690       * @link https://developer.wordpress.org/themes/customize-api
3691       *                                            Default is 'refresh'
3692       *  @type callable     $validate_callback     Server-side validation callback for the setting's value.
3693       *  @type callable     $sanitize_callback     Callback to filter a Customize setting value in un-slashed form.
3694       *  @type callable     $sanitize_js_callback  Callback to convert a Customize PHP setting value to a value that is
3695       *                                            JSON serializable.
3696       *  @type bool         $dirty                 Whether or not the setting is initially dirty when created.
3697       * }
3698       * @return WP_Customize_Setting             The instance of the setting that was added.
3699       */
3700  	public function add_setting( $id, $args = array() ) {
3701          if ( $id instanceof WP_Customize_Setting ) {
3702              $setting = $id;
3703          } else {
3704              $class = 'WP_Customize_Setting';
3705  
3706              /** This filter is documented in wp-includes/class-wp-customize-manager.php */
3707              $args = apply_filters( 'customize_dynamic_setting_args', $args, $id );
3708  
3709              /** This filter is documented in wp-includes/class-wp-customize-manager.php */
3710              $class = apply_filters( 'customize_dynamic_setting_class', $class, $id, $args );
3711  
3712              $setting = new $class( $this, $id, $args );
3713          }
3714  
3715          $this->settings[ $setting->id ] = $setting;
3716          return $setting;
3717      }
3718  
3719      /**
3720       * Register any dynamically-created settings, such as those from $_POST['customized']
3721       * that have no corresponding setting created.
3722       *
3723       * This is a mechanism to "wake up" settings that have been dynamically created
3724       * on the front end and have been sent to WordPress in `$_POST['customized']`. When WP
3725       * loads, the dynamically-created settings then will get created and previewed
3726       * even though they are not directly created statically with code.
3727       *
3728       * @since 4.2.0
3729       *
3730       * @param array $setting_ids The setting IDs to add.
3731       * @return array The WP_Customize_Setting objects added.
3732       */
3733  	public function add_dynamic_settings( $setting_ids ) {
3734          $new_settings = array();
3735          foreach ( $setting_ids as $setting_id ) {
3736              // Skip settings already created
3737              if ( $this->get_setting( $setting_id ) ) {
3738                  continue;
3739              }
3740  
3741              $setting_args  = false;
3742              $setting_class = 'WP_Customize_Setting';
3743  
3744              /**
3745               * Filters a dynamic setting's constructor args.
3746               *
3747               * For a dynamic setting to be registered, this filter must be employed
3748               * to override the default false value with an array of args to pass to
3749               * the WP_Customize_Setting constructor.
3750               *
3751               * @since 4.2.0
3752               *
3753               * @param false|array $setting_args The arguments to the WP_Customize_Setting constructor.
3754               * @param string      $setting_id   ID for dynamic setting, usually coming from `$_POST['customized']`.
3755               */
3756              $setting_args = apply_filters( 'customize_dynamic_setting_args', $setting_args, $setting_id );
3757              if ( false === $setting_args ) {
3758                  continue;
3759              }
3760  
3761              /**
3762               * Allow non-statically created settings to be constructed with custom WP_Customize_Setting subclass.
3763               *
3764               * @since 4.2.0
3765               *
3766               * @param string $setting_class WP_Customize_Setting or a subclass.
3767               * @param string $setting_id    ID for dynamic setting, usually coming from `$_POST['customized']`.
3768               * @param array  $setting_args  WP_Customize_Setting or a subclass.
3769               */
3770              $setting_class = apply_filters( 'customize_dynamic_setting_class', $setting_class, $setting_id, $setting_args );
3771  
3772              $setting = new $setting_class( $this, $setting_id, $setting_args );
3773  
3774              $this->add_setting( $setting );
3775              $new_settings[] = $setting;
3776          }
3777          return $new_settings;
3778      }
3779  
3780      /**
3781       * Retrieve a customize setting.
3782       *
3783       * @since 3.4.0
3784       *
3785       * @param string $id Customize Setting ID.
3786       * @return WP_Customize_Setting|void The setting, if set.
3787       */
3788  	public function get_setting( $id ) {
3789          if ( isset( $this->settings[ $id ] ) ) {
3790              return $this->settings[ $id ];
3791          }
3792      }
3793  
3794      /**
3795       * Remove a customize setting.
3796       *
3797       * @since 3.4.0
3798       *
3799       * @param string $id Customize Setting ID.
3800       */
3801  	public function remove_setting( $id ) {
3802          unset( $this->settings[ $id ] );
3803      }
3804  
3805      /**
3806       * Add a customize panel.
3807       *
3808       * @since 4.0.0
3809       * @since 4.5.0 Return added WP_Customize_Panel instance.
3810       *
3811       * @param WP_Customize_Panel|string $id   Customize Panel object, or Panel ID.
3812       * @param array                     $args {
3813       *  Optional. Array of properties for the new Panel object. Default empty array.
3814       *  @type int          $priority              Priority of the panel, defining the display order of panels and sections.
3815       *                                            Default 160.
3816       *  @type string       $capability            Capability required for the panel. Default `edit_theme_options`
3817       *  @type string|array $theme_supports        Theme features required to support the panel.
3818       *  @type string       $title                 Title of the panel to show in UI.
3819       *  @type string       $description           Description to show in the UI.
3820       *  @type string       $type                  Type of the panel.
3821       *  @type callable     $active_callback       Active callback.
3822       * }
3823       * @return WP_Customize_Panel             The instance of the panel that was added.
3824       */
3825  	public function add_panel( $id, $args = array() ) {
3826          if ( $id instanceof WP_Customize_Panel ) {
3827              $panel = $id;
3828          } else {
3829              $panel = new WP_Customize_Panel( $this, $id, $args );
3830          }
3831  
3832          $this->panels[ $panel->id ] = $panel;
3833          return $panel;
3834      }
3835  
3836      /**
3837       * Retrieve a customize panel.
3838       *
3839       * @since 4.0.0
3840       *
3841       * @param string $id Panel ID to get.
3842       * @return WP_Customize_Panel|void Requested panel instance, if set.
3843       */
3844  	public function get_panel( $id ) {
3845          if ( isset( $this->panels[ $id ] ) ) {
3846              return $this->panels[ $id ];
3847          }
3848      }
3849  
3850      /**
3851       * Remove a customize panel.
3852       *
3853       * @since 4.0.0
3854       *
3855       * @param string $id Panel ID to remove.
3856       */
3857  	public function remove_panel( $id ) {
3858          // Removing core components this way is _doing_it_wrong().
3859          if ( in_array( $id, $this->components, true ) ) {
3860              $message = sprintf(
3861                  /* translators: 1: Panel ID, 2: Link to 'customize_loaded_components' filter reference. */
3862                  __( 'Removing %1$s manually will cause PHP warnings. Use the %2$s filter instead.' ),
3863                  $id,
3864                  '<a href="' . esc_url( 'https://developer.wordpress.org/reference/hooks/customize_loaded_components/' ) . '"><code>customize_loaded_components</code></a>'
3865              );
3866  
3867              _doing_it_wrong( __METHOD__, $message, '4.5.0' );
3868          }
3869          unset( $this->panels[ $id ] );
3870      }
3871  
3872      /**
3873       * Register a customize panel type.
3874       *
3875       * Registered types are eligible to be rendered via JS and created dynamically.
3876       *
3877       * @since 4.3.0
3878       *
3879       * @see WP_Customize_Panel
3880       *
3881       * @param string $panel Name of a custom panel which is a subclass of WP_Customize_Panel.
3882       */
3883  	public function register_panel_type( $panel ) {
3884          $this->registered_panel_types[] = $panel;
3885      }
3886  
3887      /**
3888       * Render JS templates for all registered panel types.
3889       *
3890       * @since 4.3.0
3891       */
3892  	public function render_panel_templates() {
3893          foreach ( $this->registered_panel_types as $panel_type ) {
3894              $panel = new $panel_type( $this, 'temp', array() );
3895              $panel->print_template();
3896          }
3897      }
3898  
3899      /**
3900       * Add a customize section.
3901       *
3902       * @since 3.4.0
3903       * @since 4.5.0 Return added WP_Customize_Section instance.
3904       *
3905       * @param WP_Customize_Section|string $id   Customize Section object, or Section ID.
3906       * @param array                     $args {
3907       *  Optional. Array of properties for the new Section object. Default empty array.
3908       *  @type int          $priority              Priority of the section, defining the display order of panels and sections.
3909       *                                            Default 160.
3910       *  @type string       $panel                 The panel this section belongs to (if any). Default empty.
3911       *  @type string       $capability            Capability required for the section. Default 'edit_theme_options'
3912       *  @type string|array $theme_supports        Theme features required to support the section.
3913       *  @type string       $title                 Title of the section to show in UI.
3914       *  @type string       $description           Description to show in the UI.
3915       *  @type string       $type                  Type of the section.
3916       *  @type callable     $active_callback       Active callback.
3917       *  @type bool         $description_hidden    Hide the description behind a help icon, instead of inline above the first control. Default false.
3918       * }
3919       * @return WP_Customize_Section             The instance of the section that was added.
3920       */
3921  	public function add_section( $id, $args = array() ) {
3922          if ( $id instanceof WP_Customize_Section ) {
3923              $section = $id;
3924          } else {
3925              $section = new WP_Customize_Section( $this, $id, $args );
3926          }
3927  
3928          $this->sections[ $section->id ] = $section;
3929          return $section;
3930      }
3931  
3932      /**
3933       * Retrieve a customize section.
3934       *
3935       * @since 3.4.0
3936       *
3937       * @param string $id Section ID.
3938       * @return WP_Customize_Section|void The section, if set.
3939       */
3940  	public function get_section( $id ) {
3941          if ( isset( $this->sections[ $id ] ) ) {
3942              return $this->sections[ $id ];
3943          }
3944      }
3945  
3946      /**
3947       * Remove a customize section.
3948       *
3949       * @since 3.4.0
3950       *
3951       * @param string $id Section ID.
3952       */
3953  	public function remove_section( $id ) {
3954          unset( $this->sections[ $id ] );
3955      }
3956  
3957      /**
3958       * Register a customize section type.
3959       *
3960       * Registered types are eligible to be rendered via JS and created dynamically.
3961       *
3962       * @since 4.3.0
3963       *
3964       * @see WP_Customize_Section
3965       *
3966       * @param string $section Name of a custom section which is a subclass of WP_Customize_Section.
3967       */
3968  	public function register_section_type( $section ) {
3969          $this->registered_section_types[] = $section;
3970      }
3971  
3972      /**
3973       * Render JS templates for all registered section types.
3974       *
3975       * @since 4.3.0
3976       */
3977  	public function render_section_templates() {
3978          foreach ( $this->registered_section_types as $section_type ) {
3979              $section = new $section_type( $this, 'temp', array() );
3980              $section->print_template();
3981          }
3982      }
3983  
3984      /**
3985       * Add a customize control.
3986       *
3987       * @since 3.4.0
3988       * @since 4.5.0 Return added WP_Customize_Control instance.
3989       *
3990       * @param WP_Customize_Control|string $id   Customize Control object, or ID.
3991       * @param array                       $args {
3992       *  Optional. Array of properties for the new Control object. Default empty array.
3993       *
3994       *  @type array        $settings              All settings tied to the control. If undefined, defaults to `$setting`.
3995       *                                            IDs in the array correspond to the ID of a registered `WP_Customize_Setting`.
3996       *  @type string       $setting               The primary setting for the control (if there is one). Default is 'default'.
3997       *  @type string       $capability            Capability required to use this control. Normally derived from `$settings`.
3998       *  @type int          $priority              Order priority to load the control. Default 10.
3999       *  @type string       $section               The section this control belongs to. Default empty.
4000       *  @type string       $label                 Label for the control. Default empty.
4001       *  @type string       $description           Description for the control. Default empty.
4002       *  @type array        $choices               List of choices for 'radio' or 'select' type controls, where values
4003       *                                            are the keys, and labels are the values. Default empty array.
4004       *  @type array        $input_attrs           List of custom input attributes for control output, where attribute
4005       *                                            names are the keys and values are the values. Default empty array.
4006       *  @type bool         $allow_addition        Show UI for adding new content, currently only used for the
4007       *                                            dropdown-pages control. Default false.
4008       *  @type string       $type                  The type of the control. Default 'text'.
4009       *  @type callback     $active_callback       Active callback.
4010       * }
4011       * @return WP_Customize_Control             The instance of the control that was added.
4012       */
4013  	public function add_control( $id, $args = array() ) {
4014          if ( $id instanceof WP_Customize_Control ) {
4015              $control = $id;
4016          } else {
4017              $control = new WP_Customize_Control( $this, $id, $args );
4018          }
4019  
4020          $this->controls[ $control->id ] = $control;
4021          return $control;
4022      }
4023  
4024      /**
4025       * Retrieve a customize control.
4026       *
4027       * @since 3.4.0
4028       *
4029       * @param string $id ID of the control.
4030       * @return WP_Customize_Control|void The control object, if set.
4031       */
4032  	public function get_control( $id ) {
4033          if ( isset( $this->controls[ $id ] ) ) {
4034              return $this->controls[ $id ];
4035          }
4036      }
4037  
4038      /**
4039       * Remove a customize control.
4040       *
4041       * @since 3.4.0
4042       *
4043       * @param string $id ID of the control.
4044       */
4045  	public function remove_control( $id ) {
4046          unset( $this->controls[ $id ] );
4047      }
4048  
4049      /**
4050       * Register a customize control type.
4051       *
4052       * Registered types are eligible to be rendered via JS and created dynamically.
4053       *
4054       * @since 4.1.0
4055       *
4056       * @param string $control Name of a custom control which is a subclass of
4057       *                        WP_Customize_Control.
4058       */
4059  	public function register_control_type( $control ) {
4060          $this->registered_control_types[] = $control;
4061      }
4062  
4063      /**
4064       * Render JS templates for all registered control types.
4065       *
4066       * @since 4.1.0
4067       */
4068  	public function render_control_templates() {
4069          if ( $this->branching() ) {
4070              $l10n = array(
4071                  /* translators: %s: User who is customizing the changeset in customizer. */
4072                  'locked'                => __( '%s is already customizing this changeset. Please wait until they are done to try customizing. Your latest changes have been autosaved.' ),
4073                  /* translators: %s: User who is customizing the changeset in customizer. */
4074                  'locked_allow_override' => __( '%s is already customizing this changeset. Do you want to take over?' ),
4075              );
4076          } else {
4077              $l10n = array(
4078                  /* translators: %s: User who is customizing the changeset in customizer. */
4079                  'locked'                => __( '%s is already customizing this site. Please wait until they are done to try customizing. Your latest changes have been autosaved.' ),
4080                  /* translators: %s: User who is customizing the changeset in customizer. */
4081                  'locked_allow_override' => __( '%s is already customizing this site. Do you want to take over?' ),
4082              );
4083          }
4084  
4085          foreach ( $this->registered_control_types as $control_type ) {
4086              $control = new $control_type(
4087                  $this,
4088                  'temp',
4089                  array(
4090                      'settings' => array(),
4091                  )
4092              );
4093              $control->print_template();
4094          }
4095          ?>
4096  
4097          <script type="text/html" id="tmpl-customize-control-default-content">
4098              <#
4099              var inputId = _.uniqueId( 'customize-control-default-input-' );
4100              var descriptionId = _.uniqueId( 'customize-control-default-description-' );
4101              var describedByAttr = data.description ? ' aria-describedby="' + descriptionId + '" ' : '';
4102              #>
4103              <# switch ( data.type ) {
4104                  case 'checkbox': #>
4105                      <span class="customize-inside-control-row">
4106                          <input
4107                              id="{{ inputId }}"
4108                              {{{ describedByAttr }}}
4109                              type="checkbox"
4110                              value="{{ data.value }}"
4111                              data-customize-setting-key-link="default"
4112                          >
4113                          <label for="{{ inputId }}">
4114                              {{ data.label }}
4115                          </label>
4116                          <# if ( data.description ) { #>
4117                              <span id="{{ descriptionId }}" class="description customize-control-description">{{{ data.description }}}</span>
4118                          <# } #>
4119                      </span>
4120                      <#
4121                      break;
4122                  case 'radio':
4123                      if ( ! data.choices ) {
4124                          return;
4125                      }
4126                      #>
4127                      <# if ( data.label ) { #>
4128                          <label for="{{ inputId }}" class="customize-control-title">
4129                              {{ data.label }}
4130                          </label>
4131                      <# } #>
4132                      <# if ( data.description ) { #>
4133                          <span id="{{ descriptionId }}" class="description customize-control-description">{{{ data.description }}}</span>
4134                      <# } #>
4135                      <# _.each( data.choices, function( val, key ) { #>
4136                          <span class="customize-inside-control-row">
4137                              <#
4138                              var value, text;
4139                              if ( _.isObject( val ) ) {
4140                                  value = val.value;
4141                                  text = val.text;
4142                              } else {
4143                                  value = key;
4144                                  text = val;
4145                              }
4146                              #>
4147                              <input
4148                                  id="{{ inputId + '-' + value }}"
4149                                  type="radio"
4150                                  value="{{ value }}"
4151                                  name="{{ inputId }}"
4152                                  data-customize-setting-key-link="default"
4153                                  {{{ describedByAttr }}}
4154                              >
4155                              <label for="{{ inputId + '-' + value }}">{{ text }}</label>
4156                          </span>
4157                      <# } ); #>
4158                      <#
4159                      break;
4160                  default:
4161                      #>
4162                      <# if ( data.label ) { #>
4163                          <label for="{{ inputId }}" class="customize-control-title">
4164                              {{ data.label }}
4165                          </label>
4166                      <# } #>
4167                      <# if ( data.description ) { #>
4168                          <span id="{{ descriptionId }}" class="description customize-control-description">{{{ data.description }}}</span>
4169                      <# } #>
4170  
4171                      <#
4172                      var inputAttrs = {
4173                          id: inputId,
4174                          'data-customize-setting-key-link': 'default'
4175                      };
4176                      if ( 'textarea' === data.type ) {
4177                          inputAttrs.rows = '5';
4178                      } else if ( 'button' === data.type ) {
4179                          inputAttrs['class'] = 'button button-secondary';
4180                          inputAttrs.type = 'button';
4181                      } else {
4182                          inputAttrs.type = data.type;
4183                      }
4184                      if ( data.description ) {
4185                          inputAttrs['aria-describedby'] = descriptionId;
4186                      }
4187                      _.extend( inputAttrs, data.input_attrs );
4188                      #>
4189  
4190                      <# if ( 'button' === data.type ) { #>
4191                          <button
4192                              <# _.each( _.extend( inputAttrs ), function( value, key ) { #>
4193                                  {{{ key }}}="{{ value }}"
4194                              <# } ); #>
4195                          >{{ inputAttrs.value }}</button>
4196                      <# } else if ( 'textarea' === data.type ) { #>
4197                          <textarea
4198                              <# _.each( _.extend( inputAttrs ), function( value, key ) { #>
4199                                  {{{ key }}}="{{ value }}"
4200                              <# }); #>
4201                          >{{ inputAttrs.value }}</textarea>
4202                      <# } else if ( 'select' === data.type ) { #>
4203                          <# delete inputAttrs.type; #>
4204                          <select
4205                              <# _.each( _.extend( inputAttrs ), function( value, key ) { #>
4206                                  {{{ key }}}="{{ value }}"
4207                              <# }); #>
4208                              >
4209                              <# _.each( data.choices, function( val, key ) { #>
4210                                  <#
4211                                  var value, text;
4212                                  if ( _.isObject( val ) ) {
4213                                      value = val.value;
4214                                      text = val.text;
4215                                  } else {
4216                                      value = key;
4217                                      text = val;
4218                                  }
4219                                  #>
4220                                  <option value="{{ value }}">{{ text }}</option>
4221                              <# } ); #>
4222                          </select>
4223                      <# } else { #>
4224                          <input
4225                              <# _.each( _.extend( inputAttrs ), function( value, key ) { #>
4226                                  {{{ key }}}="{{ value }}"
4227                              <# }); #>
4228                              >
4229                      <# } #>
4230              <# } #>
4231          </script>
4232  
4233          <script type="text/html" id="tmpl-customize-notification">
4234              <li class="notice notice-{{ data.type || 'info' }} {{ data.alt ? 'notice-alt' : '' }} {{ data.dismissible ? 'is-dismissible' : '' }} {{ data.containerClasses || '' }}" data-code="{{ data.code }}" data-type="{{ data.type }}">
4235                  <div class="notification-message">{{{ data.message || data.code }}}</div>
4236                  <# if ( data.dismissible ) { #>
4237                      <button type="button" class="notice-dismiss"><span class="screen-reader-text"><?php _e( 'Dismiss' ); ?></span></button>
4238                  <# } #>
4239              </li>
4240          </script>
4241  
4242          <script type="text/html" id="tmpl-customize-changeset-locked-notification">
4243              <li class="notice notice-{{ data.type || 'info' }} {{ data.containerClasses || '' }}" data-code="{{ data.code }}" data-type="{{ data.type }}">
4244                  <div class="notification-message customize-changeset-locked-message">
4245                      <img class="customize-changeset-locked-avatar" src="{{ data.lockUser.avatar }}" alt="{{ data.lockUser.name }}">
4246                      <p class="currently-editing">
4247                          <# if ( data.message ) { #>
4248                              {{{ data.message }}}
4249                          <# } else if ( data.allowOverride ) { #>
4250                              <?php
4251                              echo esc_html( sprintf( $l10n['locked_allow_override'], '{{ data.lockUser.name }}' ) );
4252                              ?>
4253                          <# } else { #>
4254                              <?php
4255                              echo esc_html( sprintf( $l10n['locked'], '{{ data.lockUser.name }}' ) );
4256                              ?>
4257                          <# } #>
4258                      </p>
4259                      <p class="notice notice-error notice-alt" hidden></p>
4260                      <p class="action-buttons">
4261                          <# if ( data.returnUrl !== data.previewUrl ) { #>
4262                              <a class="button customize-notice-go-back-button" href="{{ data.returnUrl }}"><?php _e( 'Go back' ); ?></a>
4263                          <# } #>
4264                          <a class="button customize-notice-preview-button" href="{{ data.frontendPreviewUrl }}"><?php _e( 'Preview' ); ?></a>
4265                          <# if ( data.allowOverride ) { #>
4266                              <button class="button button-primary wp-tab-last customize-notice-take-over-button"><?php _e( 'Take over' ); ?></button>
4267                          <# } #>
4268                      </p>
4269                  </div>
4270              </li>
4271          </script>
4272  
4273          <script type="text/html" id="tmpl-customize-code-editor-lint-error-notification">
4274              <li class="notice notice-{{ data.type || 'info' }} {{ data.alt ? 'notice-alt' : '' }} {{ data.dismissible ? 'is-dismissible' : '' }} {{ data.containerClasses || '' }}" data-code="{{ data.code }}" data-type="{{ data.type }}">
4275                  <div class="notification-message">{{{ data.message || data.code }}}</div>
4276  
4277                  <p>
4278                      <# var elementId = 'el-' + String( Math.random() ); #>
4279                      <input id="{{ elementId }}" type="checkbox">
4280                      <label for="{{ elementId }}"><?php _e( 'Update anyway, even though it might break your site?' ); ?></label>
4281                  </p>
4282              </li>
4283          </script>
4284  
4285          <?php
4286          /* The following template is obsolete in core but retained for plugins. */
4287          ?>
4288          <script type="text/html" id="tmpl-customize-control-notifications">
4289              <ul>
4290                  <# _.each( data.notifications, function( notification ) { #>
4291                      <li class="notice notice-{{ notification.type || 'info' }} {{ data.altNotice ? 'notice-alt' : '' }}" data-code="{{ notification.code }}" data-type="{{ notification.type }}">{{{ notification.message || notification.code }}}</li>
4292                  <# } ); #>
4293              </ul>
4294          </script>
4295  
4296          <script type="text/html" id="tmpl-customize-preview-link-control" >
4297              <# var elementPrefix = _.uniqueId( 'el' ) + '-' #>
4298              <p class="customize-control-title">
4299                  <?php esc_html_e( 'Share Preview Link' ); ?>
4300              </p>
4301              <p class="description customize-control-description"><?php esc_html_e( 'See how changes would look live on your website, and share the preview with people who can\'t access the Customizer.' ); ?></p>
4302              <div class="customize-control-notifications-container"></div>
4303              <div class="preview-link-wrapper">
4304                  <label for="{{ elementPrefix }}customize-preview-link-input" class="screen-reader-text"><?php esc_html_e( 'Preview Link' ); ?></label>
4305                  <a href="" target="">
4306                      <span class="preview-control-element" data-component="url"></span>
4307                      <span class="screen-reader-text"><?php _e( '(opens in a new tab)' ); ?></span>
4308                  </a>
4309                  <input id="{{ elementPrefix }}customize-preview-link-input" readonly tabindex="-1" class="preview-control-element" data-component="input">
4310                  <button class="customize-copy-preview-link preview-control-element button button-secondary" data-component="button" data-copy-text="<?php esc_attr_e( 'Copy' ); ?>" data-copied-text="<?php esc_attr_e( 'Copied' ); ?>" ><?php esc_html_e( 'Copy' ); ?></button>
4311              </div>
4312          </script>
4313          <script type="text/html" id="tmpl-customize-selected-changeset-status-control">
4314              <# var inputId = _.uniqueId( 'customize-selected-changeset-status-control-input-' ); #>
4315              <# var descriptionId = _.uniqueId( 'customize-selected-changeset-status-control-description-' ); #>
4316              <# if ( data.label ) { #>
4317                  <label for="{{ inputId }}" class="customize-control-title">{{ data.label }}</label>
4318              <# } #>
4319              <# if ( data.description ) { #>
4320                  <span id="{{ descriptionId }}" class="description customize-control-description">{{{ data.description }}}</span>
4321              <# } #>
4322              <# _.each( data.choices, function( choice ) { #>
4323                  <# var choiceId = inputId + '-' + choice.status; #>
4324                  <span class="customize-inside-control-row">
4325                      <input id="{{ choiceId }}" type="radio" value="{{ choice.status }}" name="{{ inputId }}" data-customize-setting-key-link="default">
4326                      <label for="{{ choiceId }}">{{ choice.label }}</label>
4327                  </span>
4328              <# } ); #>
4329          </script>
4330          <?php
4331      }
4332  
4333      /**
4334       * Helper function to compare two objects by priority, ensuring sort stability via instance_number.
4335       *
4336       * @since 3.4.0
4337       * @deprecated 4.7.0 Use wp_list_sort()
4338       *
4339       * @param WP_Customize_Panel|WP_Customize_Section|WP_Customize_Control $a Object A.
4340       * @param WP_Customize_Panel|WP_Customize_Section|WP_Customize_Control $b Object B.
4341       * @return int
4342       */
4343  	protected function _cmp_priority( $a, $b ) {
4344          _deprecated_function( __METHOD__, '4.7.0', 'wp_list_sort' );
4345  
4346          if ( $a->priority === $b->priority ) {
4347              return $a->instance_number - $b->instance_number;
4348          } else {
4349              return $a->priority - $b->priority;
4350          }
4351      }
4352  
4353      /**
4354       * Prepare panels, sections, and controls.
4355       *
4356       * For each, check if required related components exist,
4357       * whether the user has the necessary capabilities,
4358       * and sort by priority.
4359       *
4360       * @since 3.4.0
4361       */
4362  	public function prepare_controls() {
4363  
4364          $controls       = array();
4365          $this->controls = wp_list_sort(
4366              $this->controls,
4367              array(
4368                  'priority'        => 'ASC',
4369                  'instance_number' => 'ASC',
4370              ),
4371              'ASC',
4372              true
4373          );
4374  
4375          foreach ( $this->controls as $id => $control ) {
4376              if ( ! isset( $this->sections[ $control->section ] ) || ! $control->check_capabilities() ) {
4377                  continue;
4378              }
4379  
4380              $this->sections[ $control->section ]->controls[] = $control;
4381              $controls[ $id ]                                 = $control;
4382          }
4383          $this->controls = $controls;
4384  
4385          // Prepare sections.
4386          $this->sections = wp_list_sort(
4387              $this->sections,
4388              array(
4389                  'priority'        => 'ASC',
4390                  'instance_number' => 'ASC',
4391              ),
4392              'ASC',
4393              true
4394          );
4395          $sections       = array();
4396  
4397          foreach ( $this->sections as $section ) {
4398              if ( ! $section->check_capabilities() ) {
4399                  continue;
4400              }
4401  
4402              $section->controls = wp_list_sort(
4403                  $section->controls,
4404                  array(
4405                      'priority'        => 'ASC',
4406                      'instance_number' => 'ASC',
4407                  )
4408              );
4409  
4410              if ( ! $section->panel ) {
4411                  // Top-level section.
4412                  $sections[ $section->id ] = $section;
4413              } else {
4414                  // This section belongs to a panel.
4415                  if ( isset( $this->panels [ $section->panel ] ) ) {
4416                      $this->panels[ $section->panel ]->sections[ $section->id ] = $section;
4417                  }
4418              }
4419          }
4420          $this->sections = $sections;
4421  
4422          // Prepare panels.
4423          $this->panels = wp_list_sort(
4424              $this->panels,
4425              array(
4426                  'priority'        => 'ASC',
4427                  'instance_number' => 'ASC',
4428              ),
4429              'ASC',
4430              true
4431          );
4432          $panels       = array();
4433  
4434          foreach ( $this->panels as $panel ) {
4435              if ( ! $panel->check_capabilities() ) {
4436                  continue;
4437              }
4438  
4439              $panel->sections      = wp_list_sort(
4440                  $panel->sections,
4441                  array(
4442                      'priority'        => 'ASC',
4443                      'instance_number' => 'ASC',
4444                  ),
4445                  'ASC',
4446                  true
4447              );
4448              $panels[ $panel->id ] = $panel;
4449          }
4450          $this->panels = $panels;
4451  
4452          // Sort panels and top-level sections together.
4453          $this->containers = array_merge( $this->panels, $this->sections );
4454          $this->containers = wp_list_sort(
4455              $this->containers,
4456              array(
4457                  'priority'        => 'ASC',
4458                  'instance_number' => 'ASC',
4459              ),
4460              'ASC',
4461              true
4462          );
4463      }
4464  
4465      /**
4466       * Enqueue scripts for customize controls.
4467       *
4468       * @since 3.4.0
4469       */
4470  	public function enqueue_control_scripts() {
4471          foreach ( $this->controls as $control ) {
4472              $control->enqueue();
4473          }
4474  
4475          if ( ! is_multisite() && ( current_user_can( 'install_themes' ) || current_user_can( 'update_themes' ) || current_user_can( 'delete_themes' ) ) ) {
4476              wp_enqueue_script( 'updates' );
4477              wp_localize_script(
4478                  'updates',
4479                  '_wpUpdatesItemCounts',
4480                  array(
4481                      'totals' => wp_get_update_data(),
4482                  )
4483              );
4484          }
4485      }
4486  
4487      /**
4488       * Determine whether the user agent is iOS.
4489       *
4490       * @since 4.4.0
4491       *
4492       * @return bool Whether the user agent is iOS.
4493       */
4494  	public function is_ios() {
4495          return wp_is_mobile() && preg_match( '/iPad|iPod|iPhone/', $_SERVER['HTTP_USER_AGENT'] );
4496      }
4497  
4498      /**
4499       * Get the template string for the Customizer pane document title.
4500       *
4501       * @since 4.4.0
4502       *
4503       * @return string The template string for the document title.
4504       */
4505  	public function get_document_title_template() {
4506          if ( $this->is_theme_active() ) {
4507              /* translators: %s: Document title from the preview. */
4508              $document_title_tmpl = __( 'Customize: %s' );
4509          } else {
4510              /* translators: %s: Document title from the preview. */
4511              $document_title_tmpl = __( 'Live Preview: %s' );
4512          }
4513          $document_title_tmpl = html_entity_decode( $document_title_tmpl, ENT_QUOTES, 'UTF-8' ); // Because exported to JS and assigned to document.title.
4514          return $document_title_tmpl;
4515      }
4516  
4517      /**
4518       * Set the initial URL to be previewed.
4519       *
4520       * URL is validated.
4521       *
4522       * @since 4.4.0
4523       *
4524       * @param string $preview_url URL to be previewed.
4525       */
4526  	public function set_preview_url( $preview_url ) {
4527          $preview_url       = esc_url_raw( $preview_url );
4528          $this->preview_url = wp_validate_redirect( $preview_url, home_url( '/' ) );
4529      }
4530  
4531      /**
4532       * Get the initial URL to be previewed.
4533       *
4534       * @since 4.4.0
4535       *
4536       * @return string URL being previewed.
4537       */
4538  	public function get_preview_url() {
4539          if ( empty( $this->preview_url ) ) {
4540              $preview_url = home_url( '/' );
4541          } else {
4542              $preview_url = $this->preview_url;
4543          }
4544          return $preview_url;
4545      }
4546  
4547      /**
4548       * Determines whether the admin and the frontend are on different domains.
4549       *
4550       * @since 4.7.0
4551       *
4552       * @return bool Whether cross-domain.
4553       */
4554  	public function is_cross_domain() {
4555          $admin_origin = wp_parse_url( admin_url() );
4556          $home_origin  = wp_parse_url( home_url() );
4557          $cross_domain = ( strtolower( $admin_origin['host'] ) !== strtolower( $home_origin['host'] ) );
4558          return $cross_domain;
4559      }
4560  
4561      /**
4562       * Get URLs allowed to be previewed.
4563       *
4564       * If the front end and the admin are served from the same domain, load the
4565       * preview over ssl if the Customizer is being loaded over ssl. This avoids
4566       * insecure content warnings. This is not attempted if the admin and front end
4567       * are on different domains to avoid the case where the front end doesn't have
4568       * ssl certs. Domain mapping plugins can allow other urls in these conditions
4569       * using the customize_allowed_urls filter.
4570       *
4571       * @since 4.7.0
4572       *
4573       * @returns array Allowed URLs.
4574       */
4575  	public function get_allowed_urls() {
4576          $allowed_urls = array( home_url( '/' ) );
4577  
4578          if ( is_ssl() && ! $this->is_cross_domain() ) {
4579              $allowed_urls[] = home_url( '/', 'https' );
4580          }
4581  
4582          /**
4583           * Filters the list of URLs allowed to be clicked and followed in the Customizer preview.
4584           *
4585           * @since 3.4.0
4586           *
4587           * @param string[] $allowed_urls An array of allowed URLs.
4588           */
4589          $allowed_urls = array_unique( apply_filters( 'customize_allowed_urls', $allowed_urls ) );
4590  
4591          return $allowed_urls;
4592      }
4593  
4594      /**
4595       * Get messenger channel.
4596       *
4597       * @since 4.7.0
4598       *
4599       * @return string Messenger channel.
4600       */
4601  	public function get_messenger_channel() {
4602          return $this->messenger_channel;
4603      }
4604  
4605      /**
4606       * Set URL to link the user to when closing the Customizer.
4607       *
4608       * URL is validated.
4609       *
4610       * @since 4.4.0
4611       *
4612       * @param string $return_url URL for return link.
4613       */
4614  	public function set_return_url( $return_url ) {
4615          $return_url       = esc_url_raw( $return_url );
4616          $return_url       = remove_query_arg( wp_removable_query_args(), $return_url );
4617          $return_url       = wp_validate_redirect( $return_url );
4618          $this->return_url = $return_url;
4619      }
4620  
4621      /**
4622       * Get URL to link the user to when closing the Customizer.
4623       *
4624       * @since 4.4.0
4625       *
4626       * @return string URL for link to close Customizer.
4627       */
4628  	public function get_return_url() {
4629          $referer                    = wp_get_referer();
4630          $excluded_referer_basenames = array( 'customize.php', 'wp-login.php' );
4631  
4632          if ( $this->return_url ) {
4633              $return_url = $this->return_url;
4634          } elseif ( $referer && ! in_array( wp_basename( parse_url( $referer, PHP_URL_PATH ) ), $excluded_referer_basenames, true ) ) {
4635              $return_url = $referer;
4636          } elseif ( $this->preview_url ) {
4637              $return_url = $this->preview_url;
4638          } else {
4639              $return_url = home_url( '/' );
4640          }
4641          return $return_url;
4642      }
4643  
4644      /**
4645       * Set the autofocused constructs.
4646       *
4647       * @since 4.4.0
4648       *
4649       * @param array $autofocus {
4650       *     Mapping of 'panel', 'section', 'control' to the ID which should be autofocused.
4651       *
4652       *     @type string [$control]  ID for control to be autofocused.
4653       *     @type string [$section]  ID for section to be autofocused.
4654       *     @type string [$panel]    ID for panel to be autofocused.
4655       * }
4656       */
4657  	public function set_autofocus( $autofocus ) {
4658          $this->autofocus = array_filter( wp_array_slice_assoc( $autofocus, array( 'panel', 'section', 'control' ) ), 'is_string' );
4659      }
4660  
4661      /**
4662       * Get the autofocused constructs.
4663       *
4664       * @since 4.4.0
4665       *
4666       * @return array {
4667       *     Mapping of 'panel', 'section', 'control' to the ID which should be autofocused.
4668       *
4669       *     @type string [$control]  ID for control to be autofocused.
4670       *     @type string [$section]  ID for section to be autofocused.
4671       *     @type string [$panel]    ID for panel to be autofocused.
4672       * }
4673       */
4674  	public function get_autofocus() {
4675          return $this->autofocus;
4676      }
4677  
4678      /**
4679       * Get nonces for the Customizer.
4680       *
4681       * @since 4.5.0
4682       *
4683       * @return array Nonces.
4684       */
4685  	public function get_nonces() {
4686          $nonces = array(
4687              'save'                     => wp_create_nonce( 'save-customize_' . $this->get_stylesheet() ),
4688              'preview'                  => wp_create_nonce( 'preview-customize_' . $this->get_stylesheet() ),
4689              'switch_themes'            => wp_create_nonce( 'switch_themes' ),
4690              'dismiss_autosave_or_lock' => wp_create_nonce( 'customize_dismiss_autosave_or_lock' ),
4691              'override_lock'            => wp_create_nonce( 'customize_override_changeset_lock' ),
4692              'trash'                    => wp_create_nonce( 'trash_customize_changeset' ),
4693          );
4694  
4695          /**
4696           * Filters nonces for Customizer.
4697           *
4698           * @since 4.2.0
4699           *
4700           * @param string[]             $nonces Array of refreshed nonces for save and
4701           *                                     preview actions.
4702           * @param WP_Customize_Manager $this   WP_Customize_Manager instance.
4703           */
4704          $nonces = apply_filters( 'customize_refresh_nonces', $nonces, $this );
4705  
4706          return $nonces;
4707      }
4708  
4709      /**
4710       * Print JavaScript settings for parent window.
4711       *
4712       * @since 4.4.0
4713       */
4714  	public function customize_pane_settings() {
4715  
4716          $login_url = add_query_arg(
4717              array(
4718                  'interim-login'   => 1,
4719                  'customize-login' => 1,
4720              ),
4721              wp_login_url()
4722          );
4723  
4724          // Ensure dirty flags are set for modified settings.
4725          foreach ( array_keys( $this->unsanitized_post_values() ) as $setting_id ) {
4726              $setting = $this->get_setting( $setting_id );
4727              if ( $setting ) {
4728                  $setting->dirty = true;
4729              }
4730          }
4731  
4732          $autosave_revision_post  = null;
4733          $autosave_autodraft_post = null;
4734          $changeset_post_id       = $this->changeset_post_id();
4735          if ( ! $this->saved_starter_content_changeset && ! $this->autosaved() ) {
4736              if ( $changeset_post_id ) {
4737                  if ( is_user_logged_in() ) {
4738                      $autosave_revision_post = wp_get_post_autosave( $changeset_post_id, get_current_user_id() );
4739                  }
4740              } else {
4741                  $autosave_autodraft_posts = $this->get_changeset_posts(
4742                      array(
4743                          'posts_per_page'            => 1,
4744                          'post_status'               => 'auto-draft',
4745                          'exclude_restore_dismissed' => true,
4746                      )
4747                  );
4748                  if ( ! empty( $autosave_autodraft_posts ) ) {
4749                      $autosave_autodraft_post = array_shift( $autosave_autodraft_posts );
4750                  }
4751              }
4752          }
4753  
4754          $current_user_can_publish = current_user_can( get_post_type_object( 'customize_changeset' )->cap->publish_posts );
4755  
4756          // @todo Include all of the status labels here from script-loader.php, and then allow it to be filtered.
4757          $status_choices = array();
4758          if ( $current_user_can_publish ) {
4759              $status_choices[] = array(
4760                  'status' => 'publish',
4761                  'label'  => __( 'Publish' ),
4762              );
4763          }
4764          $status_choices[] = array(
4765              'status' => 'draft',
4766              'label'  => __( 'Save Draft' ),
4767          );
4768          if ( $current_user_can_publish ) {
4769              $status_choices[] = array(
4770                  'status' => 'future',
4771                  'label'  => _x( 'Schedule', 'customizer changeset action/button label' ),
4772              );
4773          }
4774  
4775          // Prepare Customizer settings to pass to JavaScript.
4776          $changeset_post = null;
4777          if ( $changeset_post_id ) {
4778              $changeset_post = get_post( $changeset_post_id );
4779          }
4780  
4781          // Determine initial date to be at present or future, not past.
4782          $current_time = current_time( 'mysql', false );
4783          $initial_date = $current_time;
4784          if ( $changeset_post ) {
4785              $initial_date = get_the_time( 'Y-m-d H:i:s', $changeset_post->ID );
4786              if ( $initial_date < $current_time ) {
4787                  $initial_date = $current_time;
4788              }
4789          }
4790  
4791          $lock_user_id = false;
4792          if ( $this->changeset_post_id() ) {
4793              $lock_user_id = wp_check_post_lock( $this->changeset_post_id() );
4794          }
4795  
4796          $settings = array(
4797              'changeset'              => array(
4798                  'uuid'                  => $this->changeset_uuid(),
4799                  'branching'             => $this->branching(),
4800                  'autosaved'             => $this->autosaved(),
4801                  'hasAutosaveRevision'   => ! empty( $autosave_revision_post ),
4802                  'latestAutoDraftUuid'   => $autosave_autodraft_post ? $autosave_autodraft_post->post_name : null,
4803                  'status'                => $changeset_post ? $changeset_post->post_status : '',
4804                  'currentUserCanPublish' => $current_user_can_publish,
4805                  'publishDate'           => $initial_date,
4806                  'statusChoices'         => $status_choices,
4807                  'lockUser'              => $lock_user_id ? $this->get_lock_user_data( $lock_user_id ) : null,
4808              ),
4809              'initialServerDate'      => $current_time,
4810              'dateFormat'             => get_option( 'date_format' ),
4811              'timeFormat'             => get_option( 'time_format' ),
4812              'initialServerTimestamp' => floor( microtime( true ) * 1000 ),
4813              'initialClientTimestamp' => -1, // To be set with JS below.
4814              'timeouts'               => array(
4815                  'windowRefresh'           => 250,
4816                  'changesetAutoSave'       => AUTOSAVE_INTERVAL * 1000,
4817                  'keepAliveCheck'          => 2500,
4818                  'reflowPaneContents'      => 100,
4819                  'previewFrameSensitivity' => 2000,
4820              ),
4821              'theme'                  => array(
4822                  'stylesheet'  => $this->get_stylesheet(),
4823                  'active'      => $this->is_theme_active(),
4824                  '_canInstall' => current_user_can( 'install_themes' ),
4825              ),
4826              'url'                    => array(
4827                  'preview'       => esc_url_raw( $this->get_preview_url() ),
4828                  'return'        => esc_url_raw( $this->get_return_url() ),
4829                  'parent'        => esc_url_raw( admin_url() ),
4830                  'activated'     => esc_url_raw( home_url( '/' ) ),
4831                  'ajax'          => esc_url_raw( admin_url( 'admin-ajax.php', 'relative' ) ),
4832                  'allowed'       => array_map( 'esc_url_raw', $this->get_allowed_urls() ),
4833                  'isCrossDomain' => $this->is_cross_domain(),
4834                  'home'          => esc_url_raw( home_url( '/' ) ),
4835                  'login'         => esc_url_raw( $login_url ),
4836              ),
4837              'browser'                => array(
4838                  'mobile' => wp_is_mobile(),
4839                  'ios'    => $this->is_ios(),
4840              ),
4841              'panels'                 => array(),
4842              'sections'               => array(),
4843              'nonce'                  => $this->get_nonces(),
4844              'autofocus'              => $this->get_autofocus(),
4845              'documentTitleTmpl'      => $this->get_document_title_template(),
4846              'previewableDevices'     => $this->get_previewable_devices(),
4847              'l10n'                   => array(
4848                  'confirmDeleteTheme'   => __( 'Are you sure you want to delete this theme?' ),
4849                  /* translators: %d: Number of theme search results, which cannot currently consider singular vs. plural forms. */
4850                  'themeSearchResults'   => __( '%d themes found' ),
4851                  /* translators: %d: Number of themes being displayed, which cannot currently consider singular vs. plural forms. */
4852                  'announceThemeCount'   => __( 'Displaying %d themes' ),
4853                  /* translators: %s: Theme name. */
4854                  'announceThemeDetails' => __( 'Showing details for theme: %s' ),
4855              ),
4856          );
4857  
4858          // Temporarily disable installation in Customizer. See #42184.
4859          $filesystem_method = get_filesystem_method();
4860          ob_start();
4861          $filesystem_credentials_are_stored = request_filesystem_credentials( self_admin_url() );
4862          ob_end_clean();
4863          if ( 'direct' !== $filesystem_method && ! $filesystem_credentials_are_stored ) {
4864              $settings['theme']['_filesystemCredentialsNeeded'] = true;
4865          }
4866  
4867          // Prepare Customize Section objects to pass to JavaScript.
4868          foreach ( $this->sections() as $id => $section ) {
4869              if ( $section->check_capabilities() ) {
4870                  $settings['sections'][ $id ] = $section->json();
4871              }
4872          }
4873  
4874          // Prepare Customize Panel objects to pass to JavaScript.
4875          foreach ( $this->panels() as $panel_id =>