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   1  <?php
   2  /**
   3   * Blocks API: WP_Block_Patterns_Registry class
   4   *
   5   * @package WordPress
   6   * @subpackage Blocks
   7   * @since 5.5.0
   8   */
   9  
  10  /**
  11   * Class used for interacting with block patterns.
  12   *
  13   * @since 5.5.0
  14   */
  15  #[AllowDynamicProperties]
  16  final class WP_Block_Patterns_Registry {
  17      /**
  18       * Registered block patterns array.
  19       *
  20       * @since 5.5.0
  21       * @var array[]
  22       */
  23      private $registered_patterns = array();
  24  
  25      /**
  26       * Patterns registered outside the `init` action.
  27       *
  28       * @since 6.0.0
  29       * @var array[]
  30       */
  31      private $registered_patterns_outside_init = array();
  32  
  33      /**
  34       * Container for the main instance of the class.
  35       *
  36       * @since 5.5.0
  37       * @var WP_Block_Patterns_Registry|null
  38       */
  39      private static $instance = null;
  40  
  41      /**
  42       * Registers a block pattern.
  43       *
  44       * @since 5.5.0
  45       * @since 5.8.0 Added support for the `blockTypes` property.
  46       * @since 6.1.0 Added support for the `postTypes` property.
  47       * @since 6.2.0 Added support for the `templateTypes` property.
  48       * @since 6.5.0 Added support for the `filePath` property.
  49       *
  50       * @param string $pattern_name       Block pattern name including namespace.
  51       * @param array  $pattern_properties {
  52       *     List of properties for the block pattern.
  53       *
  54       *     @type string   $title         Required. A human-readable title for the pattern.
  55       *     @type string   $content       Optional. Block HTML markup for the pattern.
  56       *                                   If not provided, the content will be retrieved from the `filePath` if set.
  57       *                                   If both `content` and `filePath` are not set, the pattern will not be registered.
  58       *     @type string   $description   Optional. Visually hidden text used to describe the pattern
  59       *                                   in the inserter. A description is optional, but is strongly
  60       *                                   encouraged when the title does not fully describe what the
  61       *                                   pattern does. The description will help users discover the
  62       *                                   pattern while searching.
  63       *     @type int      $viewportWidth Optional. The intended width of the pattern to allow for a scaled
  64       *                                   preview within the pattern inserter.
  65       *     @type bool     $inserter      Optional. Determines whether the pattern is visible in inserter.
  66       *                                   To hide a pattern so that it can only be inserted programmatically,
  67       *                                   set this to false. Default true.
  68       *     @type string[] $categories    Optional. A list of registered pattern categories used to group
  69       *                                   block patterns. Block patterns can be shown on multiple categories.
  70       *                                   A category must be registered separately in order to be used here.
  71       *     @type string[] $keywords      Optional. A list of aliases or keywords that help users discover
  72       *                                   the pattern while searching.
  73       *     @type string[] $blockTypes    Optional. A list of block names including namespace that could use
  74       *                                   the block pattern in certain contexts (placeholder, transforms).
  75       *                                   The block pattern is available in the block editor inserter
  76       *                                   regardless of this list of block names.
  77       *                                   Certain blocks support further specificity besides the block name
  78       *                                   (e.g. for `core/template-part` you can specify areas
  79       *                                   like `core/template-part/header` or `core/template-part/footer`).
  80       *     @type string[] $postTypes     Optional. An array of post types that the pattern is restricted
  81       *                                   to be used with. The pattern will only be available when editing one
  82       *                                   of the post types passed on the array. For all the other post types
  83       *                                   not part of the array the pattern is not available at all.
  84       *     @type string[] $templateTypes Optional. An array of template types where the pattern fits.
  85       *     @type string   $filePath      Optional. The full path to the file containing the block pattern content.
  86       * }
  87       * @return bool True if the pattern was registered with success and false otherwise.
  88       */
  89  	public function register( $pattern_name, $pattern_properties ) {
  90          if ( ! isset( $pattern_name ) || ! is_string( $pattern_name ) ) {
  91              _doing_it_wrong(
  92                  __METHOD__,
  93                  __( 'Pattern name must be a string.' ),
  94                  '5.5.0'
  95              );
  96              return false;
  97          }
  98  
  99          if ( ! isset( $pattern_properties['title'] ) || ! is_string( $pattern_properties['title'] ) ) {
 100              _doing_it_wrong(
 101                  __METHOD__,
 102                  __( 'Pattern title must be a string.' ),
 103                  '5.5.0'
 104              );
 105              return false;
 106          }
 107  
 108          if ( ! isset( $pattern_properties['filePath'] ) ) {
 109              if ( ! isset( $pattern_properties['content'] ) || ! is_string( $pattern_properties['content'] ) ) {
 110                  _doing_it_wrong(
 111                      __METHOD__,
 112                      __( 'Pattern content must be a string.' ),
 113                      '5.5.0'
 114                  );
 115                  return false;
 116              }
 117          }
 118  
 119          $pattern = array_merge(
 120              $pattern_properties,
 121              array( 'name' => $pattern_name )
 122          );
 123  
 124          $this->registered_patterns[ $pattern_name ] = $pattern;
 125  
 126          // If the pattern is registered inside an action other than `init`, store it
 127          // also to a dedicated array. Used to detect deprecated registrations inside
 128          // `admin_init` or `current_screen`.
 129          if ( current_action() && 'init' !== current_action() ) {
 130              $this->registered_patterns_outside_init[ $pattern_name ] = $pattern;
 131          }
 132  
 133          return true;
 134      }
 135  
 136      /**
 137       * Unregisters a block pattern.
 138       *
 139       * @since 5.5.0
 140       *
 141       * @param string $pattern_name Block pattern name including namespace.
 142       * @return bool True if the pattern was unregistered with success and false otherwise.
 143       */
 144  	public function unregister( $pattern_name ) {
 145          if ( ! $this->is_registered( $pattern_name ) ) {
 146              _doing_it_wrong(
 147                  __METHOD__,
 148                  /* translators: %s: Pattern name. */
 149                  sprintf( __( 'Pattern "%s" not found.' ), $pattern_name ),
 150                  '5.5.0'
 151              );
 152              return false;
 153          }
 154  
 155          unset( $this->registered_patterns[ $pattern_name ] );
 156          unset( $this->registered_patterns_outside_init[ $pattern_name ] );
 157  
 158          return true;
 159      }
 160  
 161      /**
 162       * Prepares the content of a block pattern. If hooked blocks are registered, they get injected into the pattern,
 163       * when they met the defined criteria.
 164       *
 165       * @since 6.4.0
 166       *
 167       * @param array $pattern       Registered pattern properties.
 168       * @param array $hooked_blocks The list of hooked blocks.
 169       * @return string The content of the block pattern.
 170       */
 171  	private function prepare_content( $pattern, $hooked_blocks ) {
 172          $content = $pattern['content'];
 173  
 174          $before_block_visitor = '_inject_theme_attribute_in_template_part_block';
 175          $after_block_visitor  = null;
 176          if ( ! empty( $hooked_blocks ) || has_filter( 'hooked_block_types' ) ) {
 177              $before_block_visitor = make_before_block_visitor( $hooked_blocks, $pattern );
 178              $after_block_visitor  = make_after_block_visitor( $hooked_blocks, $pattern );
 179          }
 180          $blocks  = parse_blocks( $content );
 181          $content = traverse_and_serialize_blocks( $blocks, $before_block_visitor, $after_block_visitor );
 182  
 183          return $content;
 184      }
 185  
 186      /**
 187       * Retrieves the content of a registered block pattern.
 188       *
 189       * @since 6.5.0
 190       *
 191       * @param string $pattern_name      Block pattern name including namespace.
 192       * @param bool   $outside_init_only Optional. Return only patterns registered outside the `init` action. Default false.
 193       * @return string The content of the block pattern.
 194       */
 195  	private function get_content( $pattern_name, $outside_init_only = false ) {
 196          if ( $outside_init_only ) {
 197              $patterns = &$this->registered_patterns_outside_init;
 198          } else {
 199              $patterns = &$this->registered_patterns;
 200          }
 201          if ( ! isset( $patterns[ $pattern_name ]['content'] ) && isset( $patterns[ $pattern_name ]['filePath'] ) ) {
 202              ob_start();
 203              include $patterns[ $pattern_name ]['filePath'];
 204              $patterns[ $pattern_name ]['content'] = ob_get_clean();
 205              unset( $patterns[ $pattern_name ]['filePath'] );
 206          }
 207          return $patterns[ $pattern_name ]['content'];
 208      }
 209  
 210      /**
 211       * Retrieves an array containing the properties of a registered block pattern.
 212       *
 213       * @since 5.5.0
 214       *
 215       * @param string $pattern_name Block pattern name including namespace.
 216       * @return array Registered pattern properties.
 217       */
 218  	public function get_registered( $pattern_name ) {
 219          if ( ! $this->is_registered( $pattern_name ) ) {
 220              return null;
 221          }
 222  
 223          $pattern            = $this->registered_patterns[ $pattern_name ];
 224          $pattern['content'] = $this->get_content( $pattern_name );
 225          $pattern['content'] = $this->prepare_content( $pattern, get_hooked_blocks() );
 226  
 227          return $pattern;
 228      }
 229  
 230      /**
 231       * Retrieves all registered block patterns.
 232       *
 233       * @since 5.5.0
 234       *
 235       * @param bool $outside_init_only Return only patterns registered outside the `init` action.
 236       * @return array[] Array of arrays containing the registered block patterns properties,
 237       *                 and per style.
 238       */
 239  	public function get_all_registered( $outside_init_only = false ) {
 240          $patterns      = $outside_init_only
 241                  ? $this->registered_patterns_outside_init
 242                  : $this->registered_patterns;
 243          $hooked_blocks = get_hooked_blocks();
 244  
 245          foreach ( $patterns as $index => $pattern ) {
 246              $pattern['content']            = $this->get_content( $pattern['name'], $outside_init_only );
 247              $patterns[ $index ]['content'] = $this->prepare_content( $pattern, $hooked_blocks );
 248          }
 249  
 250          return array_values( $patterns );
 251      }
 252  
 253      /**
 254       * Checks if a block pattern is registered.
 255       *
 256       * @since 5.5.0
 257       *
 258       * @param string $pattern_name Block pattern name including namespace.
 259       * @return bool True if the pattern is registered, false otherwise.
 260       */
 261  	public function is_registered( $pattern_name ) {
 262          return isset( $this->registered_patterns[ $pattern_name ] );
 263      }
 264  
 265  	public function __wakeup() {
 266          if ( ! $this->registered_patterns ) {
 267              return;
 268          }
 269          if ( ! is_array( $this->registered_patterns ) ) {
 270              throw new UnexpectedValueException();
 271          }
 272          foreach ( $this->registered_patterns as $value ) {
 273              if ( ! is_array( $value ) ) {
 274                  throw new UnexpectedValueException();
 275              }
 276          }
 277          $this->registered_patterns_outside_init = array();
 278      }
 279  
 280      /**
 281       * Utility method to retrieve the main instance of the class.
 282       *
 283       * The instance will be created if it does not exist yet.
 284       *
 285       * @since 5.5.0
 286       *
 287       * @return WP_Block_Patterns_Registry The main instance.
 288       */
 289  	public static function get_instance() {
 290          if ( null === self::$instance ) {
 291              self::$instance = new self();
 292          }
 293  
 294          return self::$instance;
 295      }
 296  }
 297  
 298  /**
 299   * Registers a new block pattern.
 300   *
 301   * @since 5.5.0
 302   *
 303   * @param string $pattern_name       Block pattern name including namespace.
 304   * @param array  $pattern_properties List of properties for the block pattern.
 305   *                                   See WP_Block_Patterns_Registry::register() for accepted arguments.
 306   * @return bool True if the pattern was registered with success and false otherwise.
 307   */
 308  function register_block_pattern( $pattern_name, $pattern_properties ) {
 309      return WP_Block_Patterns_Registry::get_instance()->register( $pattern_name, $pattern_properties );
 310  }
 311  
 312  /**
 313   * Unregisters a block pattern.
 314   *
 315   * @since 5.5.0
 316   *
 317   * @param string $pattern_name Block pattern name including namespace.
 318   * @return bool True if the pattern was unregistered with success and false otherwise.
 319   */
 320  function unregister_block_pattern( $pattern_name ) {
 321      return WP_Block_Patterns_Registry::get_instance()->unregister( $pattern_name );
 322  }