Gazelle/classes/bookmarks.class.php

<?php
#declare(strict_types=1);

class Bookmarks
{
    /**
     * Check if can bookmark
     *
     * @param string $Type
     * @return boolean
     */
    public static function can_bookmark($Type)
    {
        return in_array($Type, array(
            'torrent',
            'artist',
            'collage',
            'request'
        ));
    }

    /**
     * Get the bookmark schema.
     * Recommended usage:
     * list($Table, $Col) = bookmark_schema('torrent');
     *
     * @param string $Type the type to get the schema for
     */
    public static function bookmark_schema($Type)
    {
        switch ($Type) {
          case 'torrent':
              return array(
                  'bookmarks_torrents',
                  'GroupID'
              );
              break;

          case 'artist':
              return array(
                  'bookmarks_artists',
                  'ArtistID'
              );
              break;

          case 'collage':
              return array(
                  'bookmarks_collages',
                  'CollageID'
               );
              break;

          case 'request':
              return array(
                  'bookmarks_requests',
                  'RequestID'
              );
              break;

          default:
              error('h4x');
        }
    }

    /**
     * Check if something is bookmarked
     *
     * @param string $Type
     *          type of bookmarks to check
     * @param int $ID
     *          bookmark's id
     * @return boolean
     */
    public static function has_bookmarked($Type, $ID)
    {
        return in_array($ID, self::all_bookmarks($Type));
    }

    /**
     * Fetch all bookmarks of a certain type for a user.
     * If UserID is false than defaults to G::$LoggedUser['ID']
     *
     * @param string $Type
     *          type of bookmarks to fetch
     * @param int $UserID
     *          userid whose bookmarks to get
     * @return array the bookmarks
     */
    public static function all_bookmarks($Type, $UserID = false)
    {
        if ($UserID === false) {
            $UserID = G::$LoggedUser['ID'];
        }

        $CacheKey = "bookmarks_$Type".'_'.$UserID;
        if (($Bookmarks = G::$Cache->get_value($CacheKey)) === false) {
            list($Table, $Col) = self::bookmark_schema($Type);
            $QueryID = G::$DB->get_query_id();

            G::$DB->query("
            SELECT `$Col`
            FROM `$Table`
              WHERE UserID = '$UserID'");

            $Bookmarks = G::$DB->collect($Col);
            G::$DB->set_query_id($QueryID);
            G::$Cache->cache_value($CacheKey, $Bookmarks, 0);
        }
        return $Bookmarks;
    }
}