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Description

Clears existing translations where this item is going to be installed into.

Usage

$bool|WP_Error = Language_Pack_Upgrader::clear_destination( $remote_destination );

Parameters

$remote_destination

( string ) required – The location on the remote filesystem to be cleared.

Returns

bool|WP_Error True upon success, WP_Error on failure.

Source

File name: wordpress/wp-admin/includes/class-language-pack-upgrader.php
Lines:

  public function clear_destination( $remote_destination ) {
    global $wp_filesystem;

    $language_update    = $this->skin->language_update;
    $language_directory = WP_LANG_DIR . '/'; // Local path for use with glob().

    if ( 'core' === $language_update->type ) {
      $files = array(
        $remote_destination . $language_update->language . '.po',
        $remote_destination . $language_update->language . '.mo',
        $remote_destination . 'admin-' . $language_update->language . '.po',
        $remote_destination . 'admin-' . $language_update->language . '.mo',
        $remote_destination . 'admin-network-' . $language_update->language . '.po',
        $remote_destination . 'admin-network-' . $language_update->language . '.mo',
        $remote_destination . 'continents-cities-' . $language_update->language . '.po',
        $remote_destination . 'continents-cities-' . $language_update->language . '.mo',
      );

      $json_translation_files = glob( $language_directory . $language_update->language . '-*.json' );
      if ( $json_translation_files ) {
        foreach ( $json_translation_files as $json_translation_file ) {
          $files[] = str_replace( $language_directory, $remote_destination, $json_translation_file );
        }
      }
    } else {
      $files = array(
        $remote_destination . $language_update->slug . '-' . $language_update->language . '.po',
        $remote_destination . $language_update->slug . '-' . $language_update->language . '.mo',
      );

      $language_directory     = $language_directory . $language_update->type . 's/';
      $json_translation_files = glob( $language_directory . $language_update->slug . '-' . $language_update->language . '-*.json' );
      if ( $json_translation_files ) {
        foreach ( $json_translation_files as $json_translation_file ) {
          $files[] = str_replace( $language_directory, $remote_destination, $json_translation_file );
        }
      }
    }

    $files = array_filter( $files, array( $wp_filesystem, 'exists' ) );

    // No files to delete.
    if ( ! $files ) {
      return true;
    }

    // Check all files are writable before attempting to clear the destination.
    $unwritable_files = array();

    // Check writability.
    foreach ( $files as $file ) {
      if ( ! $wp_filesystem->is_writable( $file ) ) {
        // Attempt to alter permissions to allow writes and try again.
        $wp_filesystem->chmod( $file, FS_CHMOD_FILE );
        if ( ! $wp_filesystem->is_writable( $file ) ) {
          $unwritable_files[] = $file;
        }
      }
    }

    if ( ! empty( $unwritable_files ) ) {
      return new WP_Error( 'files_not_writable', $this->strings['files_not_writable'], implode( ', ', $unwritable_files ) );
    }

    foreach ( $files as $file ) {
      if ( ! $wp_filesystem->delete( $file ) ) {
        return new WP_Error( 'remove_old_failed', $this->strings['remove_old_failed'] );
      }
    }

    return true;
  }
 

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