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   1  <?php
   2  /**
   3   * Import WordPress Administration Screen
   4   *
   5   * @package WordPress
   6   * @subpackage Administration
   7   */
   8  
   9  define( 'WP_LOAD_IMPORTERS', true );
  10  
  11  /** Load WordPress Bootstrap */
  12  require_once  __DIR__ . '/admin.php';
  13  
  14  if ( ! current_user_can( 'import' ) ) {
  15      wp_die( __( 'Sorry, you are not allowed to import content into this site.' ) );
  16  }
  17  
  18  // Used in the HTML title tag.
  19  $title = __( 'Import' );
  20  
  21  get_current_screen()->add_help_tab(
  22      array(
  23          'id'      => 'overview',
  24          'title'   => __( 'Overview' ),
  25          'content' => '<p>' . __( 'This screen lists links to plugins to import data from blogging/content management platforms. Choose the platform you want to import from, and click Install Now when you are prompted in the popup window. If your platform is not listed, click the link to search the plugin directory for other importer plugins to see if there is one for your platform.' ) . '</p>' .
  26              '<p>' . __( 'In previous versions of WordPress, all importers were built-in. They have been turned into plugins since most people only use them once or infrequently.' ) . '</p>',
  27      )
  28  );
  29  
  30  get_current_screen()->set_help_sidebar(
  31      '<p><strong>' . __( 'For more information:' ) . '</strong></p>' .
  32      '<p>' . __( '<a href="https://wordpress.org/documentation/article/tools-import-screen/">Documentation on Import</a>' ) . '</p>' .
  33      '<p>' . __( '<a href="https://wordpress.org/support/forums">Support</a>' ) . '</p>'
  34  );
  35  
  36  if ( current_user_can( 'install_plugins' ) ) {
  37      // List of popular importer plugins from the WordPress.org API.
  38      $popular_importers = wp_get_popular_importers();
  39  } else {
  40      $popular_importers = array();
  41  }
  42  
  43  // Detect and redirect invalid importers like 'movabletype', which is registered as 'mt'.
  44  if ( ! empty( $_GET['invalid'] ) && isset( $popular_importers[ $_GET['invalid'] ] ) ) {
  45      $importer_id = $popular_importers[ $_GET['invalid'] ]['importer-id'];
  46      if ( $importer_id !== $_GET['invalid'] ) { // Prevent redirect loops.
  47          wp_redirect( admin_url( 'admin.php?import=' . $importer_id ) );
  48          exit;
  49      }
  50      unset( $importer_id );
  51  }
  52  
  53  add_thickbox();
  54  wp_enqueue_script( 'plugin-install' );
  55  wp_enqueue_script( 'updates' );
  56  
  57  require_once  ABSPATH . 'wp-admin/admin-header.php';
  58  $parent_file = 'tools.php';
  59  ?>
  60  
  61  <div class="wrap">
  62  <h1><?php echo esc_html( $title ); ?></h1>
  63  <?php
  64  if ( ! empty( $_GET['invalid'] ) ) :
  65      $importer_not_installed = '<strong>' . __( 'Error:' ) . '</strong> ' . sprintf(
  66          /* translators: %s: Importer slug. */
  67          __( 'The %s importer is invalid or is not installed.' ),
  68          '<strong>' . esc_html( $_GET['invalid'] ) . '</strong>'
  69      );
  70      wp_admin_notice(
  71          $importer_not_installed,
  72          array(
  73              'additional_classes' => array( 'error' ),
  74          )
  75      );
  76  endif;
  77  ?>
  78  <p><?php _e( 'If you have posts or comments in another system, WordPress can import those into this site. To get started, choose a system to import from below:' ); ?></p>
  79  
  80  <?php
  81  // Registered (already installed) importers. They're stored in the global $wp_importers.
  82  $importers = get_importers();
  83  
  84  // If a popular importer is not registered, create a dummy registration that links to the plugin installer.
  85  foreach ( $popular_importers as $pop_importer => $pop_data ) {
  86      if ( isset( $importers[ $pop_importer ] ) ) {
  87          continue;
  88      }
  89      if ( isset( $importers[ $pop_data['importer-id'] ] ) ) {
  90          continue;
  91      }
  92  
  93      // Fill the array of registered (already installed) importers with data of the popular importers from the WordPress.org API.
  94      $importers[ $pop_data['importer-id'] ] = array(
  95          $pop_data['name'],
  96          $pop_data['description'],
  97          'install' => $pop_data['plugin-slug'],
  98      );
  99  }
 100  
 101  if ( empty( $importers ) ) {
 102      echo '<p>' . __( 'No importers are available.' ) . '</p>'; // TODO: Make more helpful.
 103  } else {
 104      uasort( $importers, '_usort_by_first_member' );
 105      ?>
 106  <table class="widefat importers striped">
 107  
 108      <?php
 109      foreach ( $importers as $importer_id => $data ) {
 110          $plugin_slug         = '';
 111          $action              = '';
 112          $is_plugin_installed = false;
 113  
 114          if ( isset( $data['install'] ) ) {
 115              $plugin_slug = $data['install'];
 116  
 117              if ( file_exists( WP_PLUGIN_DIR . '/' . $plugin_slug ) ) {
 118                  // Looks like an importer is installed, but not active.
 119                  $plugins = get_plugins( '/' . $plugin_slug );
 120                  if ( ! empty( $plugins ) ) {
 121                      $keys        = array_keys( $plugins );
 122                      $plugin_file = $plugin_slug . '/' . $keys[0];
 123                      $url         = wp_nonce_url(
 124                          add_query_arg(
 125                              array(
 126                                  'action' => 'activate',
 127                                  'plugin' => $plugin_file,
 128                                  'from'   => 'import',
 129                              ),
 130                              admin_url( 'plugins.php' )
 131                          ),
 132                          'activate-plugin_' . $plugin_file
 133                      );
 134                      $action      = sprintf(
 135                          '<a href="%s" aria-label="%s">%s</a>',
 136                          esc_url( $url ),
 137                          /* translators: %s: Importer name. */
 138                          esc_attr( sprintf( __( 'Run %s' ), $data[0] ) ),
 139                          __( 'Run Importer' )
 140                      );
 141  
 142                      $is_plugin_installed = true;
 143                  }
 144              }
 145  
 146              if ( empty( $action ) ) {
 147                  if ( is_main_site() ) {
 148                      $url    = wp_nonce_url(
 149                          add_query_arg(
 150                              array(
 151                                  'action' => 'install-plugin',
 152                                  'plugin' => $plugin_slug,
 153                                  'from'   => 'import',
 154                              ),
 155                              self_admin_url( 'update.php' )
 156                          ),
 157                          'install-plugin_' . $plugin_slug
 158                      );
 159                      $action = sprintf(
 160                          '<a href="%1$s" class="install-now" data-slug="%2$s" data-name="%3$s" aria-label="%4$s">%5$s</a>',
 161                          esc_url( $url ),
 162                          esc_attr( $plugin_slug ),
 163                          esc_attr( $data[0] ),
 164                          /* translators: %s: Importer name. */
 165                          esc_attr( sprintf( _x( 'Install %s now', 'plugin' ), $data[0] ) ),
 166                          _x( 'Install Now', 'plugin' )
 167                      );
 168                  } else {
 169                      $action = sprintf(
 170                          /* translators: %s: URL to Import screen on the main site. */
 171                          __( 'This importer is not installed. Please install importers from <a href="%s">the main site</a>.' ),
 172                          get_admin_url( get_current_network_id(), 'import.php' )
 173                      );
 174                  }
 175              }
 176          } else {
 177              $url    = add_query_arg(
 178                  array(
 179                      'import' => $importer_id,
 180                  ),
 181                  self_admin_url( 'admin.php' )
 182              );
 183              $action = sprintf(
 184                  '<a href="%1$s" aria-label="%2$s">%3$s</a>',
 185                  esc_url( $url ),
 186                  /* translators: %s: Importer name. */
 187                  esc_attr( sprintf( __( 'Run %s' ), $data[0] ) ),
 188                  __( 'Run Importer' )
 189              );
 190  
 191              $is_plugin_installed = true;
 192          }
 193  
 194          if ( ! $is_plugin_installed && is_main_site() ) {
 195              $url     = add_query_arg(
 196                  array(
 197                      'tab'       => 'plugin-information',
 198                      'plugin'    => $plugin_slug,
 199                      'from'      => 'import',
 200                      'TB_iframe' => 'true',
 201                      'width'     => 600,
 202                      'height'    => 550,
 203                  ),
 204                  network_admin_url( 'plugin-install.php' )
 205              );
 206              $action .= sprintf(
 207                  ' | <a href="%1$s" class="thickbox open-plugin-details-modal" aria-label="%2$s">%3$s</a>',
 208                  esc_url( $url ),
 209                  /* translators: %s: Importer name. */
 210                  esc_attr( sprintf( __( 'More information about %s' ), $data[0] ) ),
 211                  __( 'Details' )
 212              );
 213          }
 214  
 215          echo "
 216              <tr class='importer-item'>
 217                  <td class='import-system'>
 218                      <span class='importer-title'>{$data[0]}</span>
 219                      <span class='importer-action'>{$action}</span>
 220                  </td>
 221                  <td class='desc'>
 222                      <span class='importer-desc'>{$data[1]}</span>
 223                  </td>
 224              </tr>";
 225      }
 226      ?>
 227  </table>
 228      <?php
 229  }
 230  
 231  if ( current_user_can( 'install_plugins' ) ) {
 232      echo '<p>' . sprintf(
 233          /* translators: %s: URL to Add Plugins screen. */
 234          __( 'If the importer you need is not listed, <a href="%s">search the plugin directory</a> to see if an importer is available.' ),
 235          esc_url( network_admin_url( 'plugin-install.php?tab=search&type=tag&s=importer' ) )
 236      ) . '</p>';
 237  }
 238  ?>
 239  
 240  </div>
 241  
 242  <?php
 243  wp_print_request_filesystem_credentials_modal();
 244  wp_print_admin_notice_templates();
 245  
 246  require_once  ABSPATH . 'wp-admin/admin-footer.php';