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