Gazelle/classes/torrents.class.php

<?php

class Torrents
{
  const FILELIST_DELIM = 0xF7; // Hex for &divide; Must be the same as phrase_boundary in sphinx.conf!
  const SNATCHED_UPDATE_INTERVAL = 3600; // How often we want to update users' snatch lists
  const SNATCHED_UPDATE_AFTERDL = 300; // How long after a torrent download we want to update a user's snatch lists

  /**
   * Function to get data and torrents for an array of GroupIDs. Order of keys doesn't matter
   *
   * @param array $GroupIDs
   * @param boolean $Return if false, nothing is returned. For priming cache.
   * @param boolean $GetArtists if true, each group will contain the result of
   *  Artists::get_artists($GroupID), in result[$GroupID]['ExtendedArtists']
   * @param boolean $Torrents if true, each group contains a list of torrents, in result[$GroupID]['Torrents']
   *
   * @return array each row of the following format:
   * GroupID => (
   *  ID
   *  Name
   *  Year
   *  RecordLabel
   *  CatalogueNumber
   *  TagList
   *  ReleaseType
   *  VanityHouse
   *  WikiImage
   *  CategoryID
   *  Torrents => {
   *    ID => {
   *      GroupID, Media, Format, Encoding, RemasterYear, Remastered,
   *      RemasterTitle, RemasterRecordLabel, RemasterCatalogueNumber, Scene,
   *      HasLog, HasCue, LogScore, FileCount, FreeTorrent, Size, Leechers,
   *      Seeders, Snatched, Time, HasFile, PersonalFL, IsSnatched
   *    }
   *  }
   *  Artists => {
   *    {
   *      id, name, aliasid // Only main artists
   *    }
   *  }
   *  ExtendedArtists => {
   *    [1-6] => { // See documentation on Artists::get_artists
   *      id, name, aliasid
   *    }
   *  }
   *  Flags => {
   *    IsSnatched
   *  }
   */
    public static function get_groups($GroupIDs, $Return = true, $GetArtists = true, $Torrents = true)
    {
        $Found = $NotFound = array_fill_keys($GroupIDs, false);
        $Key = $Torrents ? 'torrent_group_' : 'torrent_group_light_';

        foreach ($GroupIDs as $i => $GroupID) {
            if (!is_number($GroupID)) {
                unset($GroupIDs[$i], $Found[$GroupID], $NotFound[$GroupID]);
                continue;
            }
            $Data = G::$Cache->get_value($Key . $GroupID, true);
            if (!empty($Data) && is_array($Data) && $Data['ver'] == Cache::GROUP_VERSION) {
                unset($NotFound[$GroupID]);
                $Found[$GroupID] = $Data['d'];
            }
        }
        // Make sure there's something in $GroupIDs, otherwise the SQL will break
        if (count($GroupIDs) === 0) {
            return [];
        }

        /*
        Changing any of these attributes returned will cause very large, very dramatic site-wide chaos.
        Do not change what is returned or the order thereof without updating:
          torrents, artists, collages, bookmarks, better, the front page,
        and anywhere else the get_groups function is used.
        Update self::array_group(), too
        */

        if (count($NotFound) > 0) {
            $IDs = implode(',', array_keys($NotFound));
            $NotFound = [];
            $QueryID = G::$DB->get_query_id();
            G::$DB->query("
        SELECT
          ID, Name, NameRJ, NameJP, Year, CatalogueNumber, Pages, Studio, Series, DLSiteID, TagList, WikiImage, CategoryID
        FROM torrents_group
        WHERE ID IN ($IDs)");

            while ($Group = G::$DB->next_record(MYSQLI_ASSOC, true)) {
                $NotFound[$Group['ID']] = $Group;
                $NotFound[$Group['ID']]['Torrents'] = [];
                $NotFound[$Group['ID']]['Artists'] = [];
            }
            G::$DB->set_query_id($QueryID);

            /*
            $QueryID = G::$DB->get_query_id();
            G::$DB->query("
              SELECT
                ID, GroupID, UserID, Time, Image
              FROM torrents_screenshots
              WHERE GroupID IN ($IDs)");

            while ($Screenshot = G::$DB->next_record(MYSQLI_ASSOC, true)) {
              if (!isset($NotFound[$Screenshot['GroupID']]['Screenshots']))
                $NotFound[$Screenshot['GroupID']]['Screenshots'] = [];
              $NotFound[$Screenshot['GroupID']]['Screenshots'][] = $Screenshot;
            }

            G::$DB->set_query_id($QueryID);
            */

            if ($Torrents) {
                $QueryID = G::$DB->get_query_id();
                G::$DB->query("
          SELECT
            ID, GroupID, Media, Container, Codec, Resolution, AudioFormat,
            Language, Subbing, Subber, Censored, Archive, FileCount, FreeTorrent,
            Size, Leechers, Seeders, Snatched, Time, f.ExpiryTime, ID AS HasFile,
            FreeLeechType, hex(info_hash) as info_hash
          FROM torrents
          LEFT JOIN shop_freeleeches AS f ON f.TorrentID=ID
          WHERE GroupID IN ($IDs)
          ORDER BY GroupID, Media, Container, Codec, ID");
                while ($Torrent = G::$DB->next_record(MYSQLI_ASSOC, true)) {
                    $NotFound[$Torrent['GroupID']]['Torrents'][$Torrent['ID']] = $Torrent;
                }
                G::$DB->set_query_id($QueryID);
            }

            foreach ($NotFound as $GroupID => $GroupInfo) {
                G::$Cache->cache_value($Key . $GroupID, array('ver' => Cache::GROUP_VERSION, 'd' => $GroupInfo), 0);
            }

            $Found = $NotFound + $Found;
        }

        // Filter out orphans (elements that are == false)
        $Found = array_filter($Found);

        if ($GetArtists) {
            $Artists = Artists::get_artists($GroupIDs);
        } else {
            $Artists = [];
        }

        if ($Return) { // If we're interested in the data, and not just caching it
            foreach ($Artists as $GroupID => $Data) {
                if (!isset($Found[$GroupID])) {
                    continue;
                }
                $Found[$GroupID]['Artists'] = $Data;
            }
            // Fetch all user specific torrent properties
            if ($Torrents) {
                foreach ($Found as &$Group) {
                    $Group['Flags'] = array('IsSnatched' => false, 'IsSeeding' => false, 'IsLeeching' => false);
                    if (!empty($Group['Torrents'])) {
                        foreach ($Group['Torrents'] as &$Torrent) {
                            self::torrent_properties($Torrent, $Group['Flags']);
                        }
                    }
                }
            }
            return $Found;
        }
    }

    /**
     * Returns a reconfigured array from a Torrent Group
     *
     * Use this with extract() instead of the volatile list($GroupID, ...)
     * Then use the variables $GroupID, $GroupName, etc
     *
     * @example  extract(Torrents::array_group($SomeGroup));
     * @param array $Group torrent group
     * @return array Re-key'd array
     */
    public static function array_group(array &$Group)
    {
        return array(
      'GroupID' => $Group['ID'],
      'GroupName' => $Group['Name'],
      'GroupNameRJ' => $Group['NameRJ'],
      'GroupNameJP' => $Group['NameJP'],
      'GroupYear' => $Group['Year'],
      'GroupCategoryID' => $Group['CategoryID'],
      'GroupCatalogueNumber' => $Group['CatalogueNumber'],
      'GroupPages' => $Group['Pages'],
      'GroupDLSiteID' => ($Group['DLSiteID'] ?? ''),
      'GroupStudio' => $Group['Studio'],
      'GroupSeries' => $Group['Series'],
      'GroupFlags' => ($Group['Flags'] ?? ''),
      'TagList' => $Group['TagList'],
      'WikiImage' => $Group['WikiImage'],
      'Torrents' => $Group['Torrents'],
      'Artists' => $Group['Artists']
    );
    }

    /**
     * Supplements a torrent array with information that only concerns certain users and therefore cannot be cached
     *
     * @param array $Torrent torrent array preferably in the form used by Torrents::get_groups() or get_group_info()
     * @param int $TorrentID
     */
    public static function torrent_properties(&$Torrent, &$Flags)
    {
        $Torrent['PersonalFL'] = empty($Torrent['FreeTorrent']) && self::has_token($Torrent['ID']);
        if ($Torrent['IsSnatched'] = self::has_snatched($Torrent['ID'])) {
            $Flags['IsSnatched'] = true;
        } else {
            $Flags['IsSnatched'] = false;
        }

        if ($Torrent['IsSeeding'] = self::is_seeding($Torrent['ID'])) {
            $Flags['IsSeeding'] = true;
        } else {
            $Flags['IsSeeding'] = false;
        }

        if ($Torrent['IsLeeching'] = self::is_leeching($Torrent['ID'])) {
            $Flags['IsLeeching'] = true;
        } else {
            $Flags['IsLeeching'] = false;
        }
    }

    /*
     * Write to the group log.
     *
     * @param int $GroupID
     * @param int $TorrentID
     * @param int $UserID
     * @param string $Message
     * @param boolean $Hidden Currently does fuck all.
     *
     * todo: Fix that
     */
    public static function write_group_log($GroupID, $TorrentID, $UserID, $Message, $Hidden)
    {
        global $Time;
        $QueryID = G::$DB->get_query_id();
        G::$DB->query(
            "
      INSERT INTO group_log
        (GroupID, TorrentID, UserID, Info, Time, Hidden)
      VALUES
        (?, ?, ?, ?, NOW(), ?)",
            $GroupID,
            $TorrentID,
            $UserID,
            $Message,
            $Hidden
        );
        G::$DB->set_query_id($QueryID);
    }

    /**
     * Delete a torrent.
     *
     * @param int $ID The ID of the torrent to delete.
     * @param int $GroupID Set it if you have it handy, to save a query. Otherwise, it will be found.
     * @param string $OcelotReason The deletion reason for ocelot to report to users.
     */
    public static function delete_torrent($ID, $GroupID = 0, $OcelotReason = -1)
    {
        $QueryID = G::$DB->get_query_id();
        if (!$GroupID) {
            G::$DB->query("
        SELECT GroupID, UserID
        FROM torrents
        WHERE ID = '$ID'");
            list($GroupID, $UploaderID) = G::$DB->next_record();
        }
        if (empty($UserID)) {
            G::$DB->query("
        SELECT UserID
        FROM torrents
        WHERE ID = '$ID'");
            list($UserID) = G::$DB->next_record();
        }

        $RecentUploads = G::$Cache->get_value("recent_uploads_$UserID");
        if (is_array($RecentUploads)) {
            foreach ($RecentUploads as $Key => $Recent) {
                if ($Recent['ID'] == $GroupID) {
                    G::$Cache->delete_value("recent_uploads_$UserID");
                }
            }
        }

        G::$DB->query("
      SELECT info_hash
      FROM torrents
      WHERE ID = $ID");
        list($InfoHash) = G::$DB->next_record(MYSQLI_BOTH, false);
        G::$DB->query("
      DELETE FROM torrents
      WHERE ID = $ID");
        Tracker::update_tracker('delete_torrent', array('info_hash' => rawurlencode($InfoHash), 'id' => $ID, 'reason' => $OcelotReason));

        G::$Cache->decrement('stats_torrent_count');

        G::$DB->query("
      SELECT COUNT(ID)
      FROM torrents
      WHERE GroupID = '$GroupID'");
        list($Count) = G::$DB->next_record();

        if ($Count == 0) {
            Torrents::delete_group($GroupID);
        } else {
            Torrents::update_hash($GroupID);
        }

        // Torrent notifications
        G::$DB->query("
      SELECT UserID
      FROM users_notify_torrents
      WHERE TorrentID = '$ID'");
        while (list($UserID) = G::$DB->next_record()) {
            G::$Cache->delete_value("notifications_new_$UserID");
        }
        G::$DB->query("
      DELETE FROM users_notify_torrents
      WHERE TorrentID = '$ID'");

        G::$DB->query("
      UPDATE reportsv2
      SET
        Status = 'Resolved',
        LastChangeTime = NOW(),
        ModComment = 'Report already dealt with (torrent deleted)'
      WHERE TorrentID = ?
        AND Status != 'Resolved'", $ID);
        $Reports = G::$DB->affected_rows();
        if ($Reports) {
            G::$Cache->decrement('num_torrent_reportsv2', $Reports);
        }

        unlink(TORRENT_STORE.$ID.'.torrent');
        G::$DB->query("
      DELETE FROM torrents_bad_tags
      WHERE TorrentID = ?", $ID);
        G::$DB->query("
      DELETE FROM torrents_bad_folders
      WHERE TorrentID = ?", $ID);
        G::$DB->query("
      DELETE FROM torrents_bad_files
      WHERE TorrentID = ?", $ID);

        G::$DB->query("
      DELETE FROM shop_freeleeches
      WHERE TorrentID = ?", $ID);
        $FLs = G::$DB->affected_rows();
        if ($FLs) {
            G::$Cache->delete_value('shop_freeleech_list');
        }

        // Tells Sphinx that the group is removed
        G::$DB->query("
      REPLACE INTO sphinx_delta (ID, Time)
      VALUES (?, UNIX_TIMESTAMP())", $ID);

        G::$Cache->delete_value("torrent_download_$ID");
        G::$Cache->delete_value("torrent_group_$GroupID");
        G::$Cache->delete_value("torrents_details_$GroupID");
        G::$DB->set_query_id($QueryID);
    }

    /**
     * Delete a group, called after all of its torrents have been deleted.
     * IMPORTANT: Never call this unless you're certain the group is no longer used by any torrents
     *
     * @param int $GroupID
     */
    public static function delete_group($GroupID)
    {
        $QueryID = G::$DB->get_query_id();

        Misc::write_log("Group $GroupID automatically deleted (No torrents have this group).");

        G::$DB->query("
      SELECT CategoryID
      FROM torrents_group
      WHERE ID = ?", $GroupID);
        list($Category) = G::$DB->next_record();
        if ($Category == 1) {
            G::$Cache->decrement('stats_album_count');
        }
        G::$Cache->decrement('stats_group_count');

        // Collages
        G::$DB->query("
      SELECT CollageID
      FROM collages_torrents
      WHERE GroupID = ?", $GroupID);
        if (G::$DB->has_results()) {
            $CollageIDs = G::$DB->collect('CollageID');
            G::$DB->query("
        UPDATE collages
        SET NumTorrents = NumTorrents - 1
        WHERE ID IN (".implode(', ', $CollageIDs).')');
            G::$DB->query("
        DELETE FROM collages_torrents
        WHERE GroupID = ?", $GroupID);

            foreach ($CollageIDs as $CollageID) {
                G::$Cache->delete_value("collage_$CollageID");
            }
            G::$Cache->delete_value("torrent_collages_$GroupID");
        }

        // Artists
        // Collect the artist IDs and then wipe the torrents_artist entry
        G::$DB->query("
      SELECT ArtistID
      FROM torrents_artists
      WHERE GroupID = ?", $GroupID);
        $Artists = G::$DB->collect('ArtistID');

        G::$DB->query("
      DELETE FROM torrents_artists
      WHERE GroupID = ?", $GroupID);

        foreach ($Artists as $ArtistID) {
            if (empty($ArtistID)) {
                continue;
            }
            // Get a count of how many groups or requests use the artist ID
            G::$DB->query("
        SELECT COUNT(ag.ArtistID)
        FROM artists_group AS ag
          LEFT JOIN requests_artists AS ra ON ag.ArtistID = ra.ArtistID
        WHERE ra.ArtistID IS NOT NULL
          AND ag.ArtistID = ?", $ArtistID);
            list($ReqCount) = G::$DB->next_record();
            G::$DB->query("
        SELECT COUNT(ag.ArtistID)
        FROM artists_group AS ag
          LEFT JOIN torrents_artists AS ta ON ag.ArtistID = ta.ArtistID
        WHERE ta.ArtistID IS NOT NULL
          AND ag.ArtistID = ?", $ArtistID);
            list($GroupCount) = G::$DB->next_record();
            if (($ReqCount + $GroupCount) == 0) {
                //The only group to use this artist
                Artists::delete_artist($ArtistID);
            } else {
                //Not the only group, still need to clear cache
                G::$Cache->delete_value("artist_groups_$ArtistID");
            }
        }

        // Requests
        G::$DB->query("
      SELECT ID
      FROM requests
      WHERE GroupID = ?", $GroupID);
        $Requests = G::$DB->collect('ID');
        G::$DB->query("
      UPDATE requests
      SET GroupID = NULL
      WHERE GroupID = ?", $GroupID);
        foreach ($Requests as $RequestID) {
            G::$Cache->delete_value("request_$RequestID");
        }

        // Comments
        Comments::delete_page('torrents', $GroupID);

        G::$DB->query("
      DELETE FROM torrents_group
      WHERE ID = ?", $GroupID);
        G::$DB->query("
      DELETE FROM torrents_tags
      WHERE GroupID = ?", $GroupID);
        G::$DB->query("
      DELETE FROM bookmarks_torrents
      WHERE GroupID = ?", $GroupID);
        G::$DB->query("
      DELETE FROM wiki_torrents
      WHERE PageID = ?", $GroupID);

        G::$Cache->delete_value("torrents_details_$GroupID");
        G::$Cache->delete_value("torrent_group_$GroupID");
        G::$Cache->delete_value("groups_artists_$GroupID");
        G::$DB->set_query_id($QueryID);
    }

    /**
     * Update the cache and sphinx delta index to keep everything up-to-date.
     *
     * @param int $GroupID
     */
    public static function update_hash($GroupID)
    {
        $QueryID = G::$DB->get_query_id();

        G::$DB->query("
      UPDATE torrents_group
      SET TagList = (
          SELECT REPLACE(GROUP_CONCAT(tags.Name SEPARATOR ' '), '.', '_')
          FROM torrents_tags AS t
            INNER JOIN tags ON tags.ID = t.TagID
          WHERE t.GroupID = ?
          GROUP BY t.GroupID
          )
      WHERE ID = ?", $GroupID, $GroupID);

        // Fetch album artists
        G::$DB->query("
      SELECT GROUP_CONCAT(ag.Name separator ' ')
      FROM torrents_artists AS ta
        JOIN artists_group AS ag ON ag.ArtistID = ta.ArtistID
      WHERE ta.GroupID = ?
      GROUP BY ta.GroupID", $GroupID);
        if (G::$DB->has_results()) {
            list($ArtistName) = G::$DB->next_record(MYSQLI_NUM, false);
        } else {
            $ArtistName = '';
        }

        G::$DB->query("
      REPLACE INTO sphinx_delta
        (ID, GroupID, GroupName, GroupNameRJ, GroupNameJP, TagList, Year, CatalogueNumber, CategoryID, Time,
        Size, Snatched, Seeders, Leechers, Censored, Studio, Series, DLsiteID,
        FreeTorrent, Media, Container, Codec, Resolution, AudioFormat, Subbing, Language, Description,
        FileList, ArtistName)
      SELECT
        t.ID, g.ID, Name, NameRJ, NameJP, TagList, Year, CatalogueNumber, CategoryID, UNIX_TIMESTAMP(t.Time),
        Size, Snatched, Seeders, Leechers, Censored, Studio, Series, DLsiteID,
        CAST(FreeTorrent AS CHAR), Media, Container, Codec, Resolution, AudioFormat, Subbing, Language, Description,
        REPLACE(REPLACE(FileList, '_', ' '), '/', ' ') AS FileList, ?
      FROM torrents AS t
        JOIN torrents_group AS g ON g.ID = t.GroupID
      WHERE g.ID = ?", $ArtistName, $GroupID);

        G::$Cache->delete_value("torrents_details_$GroupID");
        G::$Cache->delete_value("torrent_group_$GroupID");
        G::$Cache->delete_value("torrent_group_light_$GroupID");

        $ArtistInfo = Artists::get_artist($GroupID);

        G::$Cache->delete_value("groups_artists_$GroupID");
        G::$DB->set_query_id($QueryID);
    }

    /**
     * Regenerate a torrent's file list from its meta data,
     * update the database record and clear relevant cache keys
     *
     * @param int $TorrentID
     */
    public static function regenerate_filelist($TorrentID)
    {
        $QueryID = G::$DB->get_query_id();

        G::$DB->query("
      SELECT GroupID
      FROM torrents
      WHERE ID = ?", $TorrentID);
        if (G::$DB->has_results()) {
            list($GroupID) = G::$DB->next_record(MYSQLI_NUM, false);
            $Contents = file_get_contents(TORRENT_STORE.$TorrentID.'.torrent');
            if (Misc::is_new_torrent($Contents)) {
                $Tor = new BencodeTorrent($Contents);
                $FilePath = (isset($Tor->Dec['info']['files']) ? Format::make_utf8($Tor->get_name()) : '');
            } else {
                $Tor = new TORRENT(unserialize(base64_decode($Contents)), true);
                $FilePath = (isset($Tor->Val['info']->Val['files']) ? Format::make_utf8($Tor->get_name()) : '');
            }
            list($TotalSize, $FileList) = $Tor->file_list();
            foreach ($FileList as $File) {
                $TmpFileList[] = self::filelist_format_file($File);
            }
            $FileString = implode("\n", $TmpFileList);
            G::$DB->query(
                "
        UPDATE torrents
        SET Size = ?, FilePath = ?, FileList = ?
        WHERE ID = ?",
                $TotalSize,
                $FilePath,
                $FileString,
                $TorrentID
            );
            G::$Cache->delete_value("torrents_details_$GroupID");
        }
        G::$DB->set_query_id($QueryID);
    }

    /**
     * Return UTF-8 encoded string to use as file delimiter in torrent file lists
     */
    public static function filelist_delim()
    {
        static $FilelistDelimUTF8;
        if (isset($FilelistDelimUTF8)) {
            return $FilelistDelimUTF8;
        }
        return $FilelistDelimUTF8 = utf8_encode(chr(self::FILELIST_DELIM));
    }

    /**
     * Create a string that contains file info in a format that's easy to use for Sphinx
     *
     * @param array $File (File size, File name)
     * @return string with the format .EXT sSIZEs NAME DELIMITER
     */
    public static function filelist_format_file($File)
    {
        list($Size, $Name) = $File;
        $Name = Format::make_utf8(strtr($Name, "\n\r\t", '   '));
        $ExtPos = strrpos($Name, '.');
        // Should not be $ExtPos !== false. Extensionless files that start with a . should not get extensions
        $Ext = ($ExtPos ? trim(substr($Name, $ExtPos + 1)) : '');
        return sprintf("%s s%ds %s %s", ".$Ext", $Size, $Name, self::filelist_delim());
    }

    /**
     * Create a string that contains file info in the old format for the API
     *
     * @param string $File string with the format .EXT sSIZEs NAME DELIMITER
     * @return string with the format NAME{{{SIZE}}}
     */
    public static function filelist_old_format($File)
    {
        $File = self::filelist_get_file($File);
        return $File['name'] . '{{{' . $File['size'] . '}}}';
    }

    /**
     * Translate a formatted file info string into a more useful array structure
     *
     * @param string $File string with the format .EXT sSIZEs NAME DELIMITER
     * @return file info array with the keys 'ext', 'size' and 'name'
     */
    public static function filelist_get_file($File)
    {
        // Need this hack because filelists are always display_str()ed
        $DelimLen = strlen(display_str(self::filelist_delim())) + 1;
        list($FileExt, $Size, $Name) = explode(' ', $File, 3);
        if ($Spaces = strspn($Name, ' ')) {
            $Name = str_replace(' ', '&nbsp;', substr($Name, 0, $Spaces)) . substr($Name, $Spaces);
        }
        return array(
          'ext' => $FileExt,
          'size' => substr($Size, 1, -1),
          'name' => substr($Name, 0, -$DelimLen)
          );
    }

    /**
     * Format the information about a torrent.
     * @param $Data an array a subset of the following keys:
     *  Format, Encoding, HasLog, LogScore HasCue, Media, Scene, RemasterYear
     *  RemasterTitle, FreeTorrent, PersonalFL
     * @param boolean $ShowMedia if false, Media key will be omitted
     * @param boolean $ShowEdition if false, RemasterYear/RemasterTitle will be omitted
     */
    public static function torrent_info($Data, $ShowMedia = true, $ShowEdition = false, $HTMLy = true)
    {
        $Info = [];
        if ($ShowMedia && !empty($Data['Media'])) {
            $Info[] = $Data['Media'];
        }
        if (!empty($Data['Container'])) {
            $Info[] = $Data['Container'];
        }
        if (!empty($Data['Codec'])) {
            $Info[] = $Data['Codec'];
        }
        if (!empty($Data['Resolution'])) {
            $Info[] = $Data['Resolution'];
        }
        /*
        if (!empty($Data['AudioFormat'])) {
          $Info[] = $Data['AudioFormat'];
        }
        */
        /*
        if (!empty($Data['Language'])) {
          if (!empty($Data['Subber']) && isset($Data['CategoryID']) && ($Data['CategoryID'] == 3 || $Data['CategoryID'] == 4)) {
            $Info[] = $Data['Language']." (".$Data['Subber'].")";
          } else {
            $Info[] = $Data['Language'];
          }
        }
        */
        /*
        if (!empty($Data['Subbing'])) {
          if (!empty($Data['Subber'])) {
            if (isset($Data['CategoryID']) && ($Data['CategoryID'] == 2 || $Data['CategoryID'] == 1) && $Data['Subbing'] != "RAW") {
              $Info[] = $Data['Subbing'] . " (" . $Data['Subber'] . ")";
            }
          } else {
            $Info[] = $Data['Subbing'];
          }
        }
        */
        if (!empty($Data['Archive'])) {
            $Info[] = $Data['Archive'];
        }
        if ($Data['Censored'] === 1) {
            $Info[] = 'Aligned';
        } else {
            $Info[] = 'Unaligned';
        }
        if ($Data['IsLeeching']) {
            $Info[] = $HTMLy ? Format::torrent_label('Leeching') : 'Leeching';
        } elseif ($Data['IsSeeding']) {
            $Info[] = $HTMLy ? Format::torrent_label('Seeding') : 'Seeding';
        } elseif ($Data['IsSnatched']) {
            $Info[] = $HTMLy ? Format::torrent_label('Snatched') : 'Snatched';
        }
        # todo: Check strict equality
        if ($Data['FreeTorrent'] == '1') {
            if ($Data['FreeLeechType'] == '3') {
                if ($Data['ExpiryTime']) {
                    $Info[] = ($HTMLy ? Format::torrent_label('Freeleech!') : 'Freeleech!') . ($HTMLy ? " <strong>(" : " (") . str_replace(['week','day','hour','min','Just now','s',' '], ['w','d','h','m','0m'], time_diff(max(strtotime($Data['ExpiryTime']), time()), 1, false)) . ($HTMLy ? ")</strong>" : ")");
                } else {
                    $Info[] = $HTMLy ? Format::torrent_label('Freeleech!') : 'Freeleech!';
                }
            } else {
                $Info[] = $HTMLy ? Format::torrent_label('Freeleech!') : 'Freeleech!';
            }
        }
        if ($Data['FreeTorrent'] == '2') {
            $Info[] = $HTMLy ? Format::torrent_label('Neutral Leech!') : 'Neutral Leech!';
        }
        if ($Data['PersonalFL']) {
            $Info[] = $HTMLy ? Format::torrent_label('Personal Freeleech!') : 'Personal Freeleech!';
        }
        return implode(' / ', $Info);
    }

    /**
     * Will freeleech / neutral leech / normalise a set of torrents
     *
     * @param array $TorrentIDs An array of torrent IDs to iterate over
     * @param int $FreeNeutral 0 = normal, 1 = fl, 2 = nl
     * @param int $FreeLeechType 0 = Unknown, 1 = Staff picks, 2 = Perma-FL (Toolbox, etc.), 3 = Vanity House
     */
    public static function freeleech_torrents($TorrentIDs, $FreeNeutral = 1, $FreeLeechType = 0, $Announce = true)
    {
        if (!is_array($TorrentIDs)) {
            $TorrentIDs = array($TorrentIDs);
        }

        $QueryID = G::$DB->get_query_id();
        G::$DB->query("
      UPDATE torrents
      SET FreeTorrent = '$FreeNeutral', FreeLeechType = '$FreeLeechType'
      WHERE ID IN (".implode(', ', $TorrentIDs).')');

        G::$DB->query('
      SELECT ID, GroupID, info_hash
      FROM torrents
      WHERE ID IN ('.implode(', ', $TorrentIDs).')
      ORDER BY GroupID ASC');
        $Torrents = G::$DB->to_array(false, MYSQLI_NUM, false);
        $GroupIDs = G::$DB->collect('GroupID');
        G::$DB->set_query_id($QueryID);

        foreach ($Torrents as $Torrent) {
            list($TorrentID, $GroupID, $InfoHash) = $Torrent;
            Tracker::update_tracker('update_torrent', array('info_hash' => rawurlencode($InfoHash), 'freetorrent' => $FreeNeutral));
            G::$Cache->delete_value("torrent_download_$TorrentID");
            Misc::write_log((G::$LoggedUser['Username']??'System')." marked torrent $TorrentID freeleech type $FreeLeechType");
            Torrents::write_group_log($GroupID, $TorrentID, (G::$LoggedUser['ID']??0), "marked as freeleech type $FreeLeechType", 0);
            if ($Announce && ($FreeLeechType == 1 || $FreeLeechType == 3)) {
                send_irc('PRIVMSG '.BOT_ANNOUNCE_CHAN.' FREELEECH - '.site_url()."torrents.php?id=$GroupID / ".site_url()."torrents.php?action=download&id=$TorrentID");
            }
        }

        foreach ($GroupIDs as $GroupID) {
            Torrents::update_hash($GroupID);
        }
    }

    /**
     * Convenience function to allow for passing groups to Torrents::freeleech_torrents()
     *
     * @param array $GroupIDs the groups in question
     * @param int $FreeNeutral see Torrents::freeleech_torrents()
     * @param int $FreeLeechType see Torrents::freeleech_torrents()
     */
    public static function freeleech_groups($GroupIDs, $FreeNeutral = 1, $FreeLeechType = 0)
    {
        $QueryID = G::$DB->get_query_id();

        if (!is_array($GroupIDs)) {
            $GroupIDs = [$GroupIDs];
        }

        G::$DB->query('
      SELECT ID
      FROM torrents
      WHERE GroupID IN ('.implode(', ', $GroupIDs).')');
        if (G::$DB->has_results()) {
            $TorrentIDs = G::$DB->collect('ID');
            Torrents::freeleech_torrents($TorrentIDs, $FreeNeutral, $FreeLeechType);
        }
        G::$DB->set_query_id($QueryID);
    }

    /**
     * Check if the logged in user has an active freeleech token
     *
     * @param int $TorrentID
     * @return true if an active token exists
     */
    public static function has_token($TorrentID)
    {
        if (empty(G::$LoggedUser)) {
            return false;
        }

        static $TokenTorrents;
        $UserID = G::$LoggedUser['ID'];
        if (!isset($TokenTorrents)) {
            $TokenTorrents = G::$Cache->get_value("users_tokens_$UserID");
            if ($TokenTorrents === false) {
                $QueryID = G::$DB->get_query_id();
                G::$DB->query("
          SELECT TorrentID
          FROM users_freeleeches
          WHERE UserID = ?
            AND Expired = 0", $UserID);
                $TokenTorrents = array_fill_keys(G::$DB->collect('TorrentID', false), true);
                G::$DB->set_query_id($QueryID);
                G::$Cache->cache_value("users_tokens_$UserID", $TokenTorrents);
            }
        }
        return isset($TokenTorrents[$TorrentID]);
    }

    /**
     * Check if the logged in user can use a freeleech token on this torrent
     *
     * @param int $Torrent
     * @return boolen True if user is allowed to use a token
     */
    public static function can_use_token($Torrent)
    {
        if (empty(G::$LoggedUser)) {
            return false;
        }
        return (G::$LoggedUser['FLTokens'] > 0
      && $Torrent['Size'] <= 10737418240
      && !$Torrent['PersonalFL']
      && empty($Torrent['FreeTorrent'])
      && G::$LoggedUser['CanLeech'] == '1');
    }

    /**
     * Build snatchlists and check if a torrent has been snatched
     * if a user has the 'ShowSnatched' option enabled
     * @param int $TorrentID
     * @return bool
     */
    public static function has_snatched($TorrentID)
    {
        if (empty(G::$LoggedUser) || !isset(G::$LoggedUser['ShowSnatched']) || !G::$LoggedUser['ShowSnatched']) {
            return false;
        }

        $UserID = G::$LoggedUser['ID'];
        $Buckets = 64;
        $LastBucket = $Buckets - 1;
        $BucketID = $TorrentID & $LastBucket;
        static $SnatchedTorrents = [], $UpdateTime = [];

        if (empty($SnatchedTorrents)) {
            $SnatchedTorrents = array_fill(0, $Buckets, false);
            $UpdateTime = G::$Cache->get_value("users_snatched_{$UserID}_time");
            if ($UpdateTime === false) {
                $UpdateTime = array(
          'last' => 0,
          'next' => 0);
            }
        } elseif (isset($SnatchedTorrents[$BucketID][$TorrentID])) {
            return true;
        }

        // Torrent was not found in the previously inspected snatch lists
        $CurSnatchedTorrents =& $SnatchedTorrents[$BucketID];
        if ($CurSnatchedTorrents === false) {
            $CurTime = time();
            // This bucket hasn't been checked before
            $CurSnatchedTorrents = G::$Cache->get_value("users_snatched_{$UserID}_$BucketID", true);
            if ($CurSnatchedTorrents === false || $CurTime > $UpdateTime['next']) {
                $Updated = [];
                $QueryID = G::$DB->get_query_id();
                if ($CurSnatchedTorrents === false || $UpdateTime['last'] == 0) {
                    for ($i = 0; $i < $Buckets; $i++) {
                        $SnatchedTorrents[$i] = [];
                    }
                    // Not found in cache. Since we don't have a suitable index, it's faster to update everything
                    G::$DB->query("
            SELECT fid
            FROM xbt_snatched
            WHERE uid = ?", $UserID);
                    while (list($ID) = G::$DB->next_record(MYSQLI_NUM, false)) {
                        $SnatchedTorrents[$ID & $LastBucket][(int)$ID] = true;
                    }
                    $Updated = array_fill(0, $Buckets, true);
                } elseif (isset($CurSnatchedTorrents[$TorrentID])) {
                    // Old cache, but torrent is snatched, so no need to update
                    return true;
                } else {
                    // Old cache, check if torrent has been snatched recently
                    G::$DB->query("
            SELECT fid
            FROM xbt_snatched
            WHERE uid = ?
              AND tstamp >= ?", $UserID, $UpdateTime['last']);
                    while (list($ID) = G::$DB->next_record(MYSQLI_NUM, false)) {
                        $CurBucketID = $ID & $LastBucket;
                        if ($SnatchedTorrents[$CurBucketID] === false) {
                            $SnatchedTorrents[$CurBucketID] = G::$Cache->get_value("users_snatched_{$UserID}_$CurBucketID", true);
                            if ($SnatchedTorrents[$CurBucketID] === false) {
                                $SnatchedTorrents[$CurBucketID] = [];
                            }
                        }
                        $SnatchedTorrents[$CurBucketID][(int)$ID] = true;
                        $Updated[$CurBucketID] = true;
                    }
                }
                G::$DB->set_query_id($QueryID);
                for ($i = 0; $i < $Buckets; $i++) {
                    if (isset($Updated[$i])) {
                        G::$Cache->cache_value("users_snatched_{$UserID}_$i", $SnatchedTorrents[$i], 0);
                    }
                }
                $UpdateTime['last'] = $CurTime;
                $UpdateTime['next'] = $CurTime + self::SNATCHED_UPDATE_INTERVAL;
                G::$Cache->cache_value("users_snatched_{$UserID}_time", $UpdateTime, 0);
            }
        }
        return isset($CurSnatchedTorrents[$TorrentID]);
    }

    public static function is_seeding($TorrentID)
    {
        if (empty(G::$LoggedUser) || !isset(G::$LoggedUser['ShowSnatched']) || !G::$LoggedUser['ShowSnatched']) {
            return false;
        }

        $UserID = G::$LoggedUser['ID'];
        $Buckets = 64;
        $LastBucket = $Buckets - 1;
        $BucketID = $TorrentID & $LastBucket;
        static $SeedingTorrents = [], $UpdateTime = [];

        if (empty($SeedingTorrents)) {
            $SeedingTorrents = array_fill(0, $Buckets, false);
            $UpdateTime = G::$Cache->get_value("users_seeding_{$UserID}_time");
            if ($UpdateTime === false) {
                $UpdateTime = array(
          'last' => 0,
          'next' => 0);
            }
        } elseif (isset($SeedingTorrents[$BucketID][$TorrentID])) {
            return true;
        }

        // Torrent was not found in the previously inspected seeding lists
        $CurSeedingTorrents =& $SeedingTorrents[$BucketID];
        if ($CurSeedingTorrents === false) {
            $CurTime = time();
            // This bucket hasn't been checked before
            $CurSeedingTorrents = G::$Cache->get_value("users_seeding_{$UserID}_$BucketID", true);
            if ($CurSeedingTorrents === false || $CurTime > $UpdateTime['next']) {
                $Updated = [];
                $QueryID = G::$DB->get_query_id();
                if ($CurSeedingTorrents === false || $UpdateTime['last'] == 0) {
                    for ($i = 0; $i < $Buckets; $i++) {
                        $SeedingTorrents[$i] = [];
                    }
                    // Not found in cache. Since we don't have a suitable index, it's faster to update everything
                    G::$DB->query("
            SELECT fid
            FROM xbt_files_users
            WHERE uid = ?
              AND active = 1
              AND Remaining = 0", $UserID);
                    while (list($ID) = G::$DB->next_record(MYSQLI_NUM, false)) {
                        $SeedingTorrents[$ID & $LastBucket][(int)$ID] = true;
                    }
                    $Updated = array_fill(0, $Buckets, true);
                } elseif (isset($CurSeedingTorrents[$TorrentID])) {
                    // Old cache, but torrent is seeding, so no need to update
                    return true;
                } else {
                    // Old cache, check if torrent has been seeding recently
                    G::$DB->query("
            SELECT fid
            FROM xbt_files_users
            WHERE uid = ?
              AND active = 1
              AND Remaining = 0
              AND mtime >= ?", $UserID, $UpdateTime['last']);
                    while (list($ID) = G::$DB->next_record(MYSQLI_NUM, false)) {
                        $CurBucketID = $ID & $LastBucket;
                        if ($SeedingTorrents[$CurBucketID] === false) {
                            $SeedingTorrents[$CurBucketID] = G::$Cache->get_value("users_seeding_{$UserID}_$CurBucketID", true);
                            if ($SeedingTorrents[$CurBucketID] === false) {
                                $SeedingTorrents[$CurBucketID] = [];
                            }
                        }
                        $SeedingTorrents[$CurBucketID][(int)$ID] = true;
                        $Updated[$CurBucketID] = true;
                    }
                }
                G::$DB->set_query_id($QueryID);
                for ($i = 0; $i < $Buckets; $i++) {
                    if (isset($Updated[$i])) {
                        G::$Cache->cache_value("users_seeding_{$UserID}_$i", $SeedingTorrents[$i], 3600);
                    }
                }
                $UpdateTime['last'] = $CurTime;
                $UpdateTime['next'] = $CurTime + self::SNATCHED_UPDATE_INTERVAL;
                G::$Cache->cache_value("users_seeding_{$UserID}_time", $UpdateTime, 3600);
            }
        }
        return isset($CurSeedingTorrents[$TorrentID]);
    }

    public static function is_leeching($TorrentID)
    {
        if (empty(G::$LoggedUser) || !isset(G::$LoggedUser['ShowSnatched']) || !G::$LoggedUser['ShowSnatched']) {
            return false;
        }

        $UserID = G::$LoggedUser['ID'];
        $Buckets = 64;
        $LastBucket = $Buckets - 1;
        $BucketID = $TorrentID & $LastBucket;
        static $LeechingTorrents = [], $UpdateTime = [];

        if (empty($LeechingTorrents)) {
            $LeechingTorrents = array_fill(0, $Buckets, false);
            $UpdateTime = G::$Cache->get_value("users_leeching_{$UserID}_time");
            if ($UpdateTime === false) {
                $UpdateTime = array(
          'last' => 0,
          'next' => 0);
            }
        } elseif (isset($LeechingTorrents[$BucketID][$TorrentID])) {
            return true;
        }

        // Torrent was not found in the previously inspected snatch lists
        $CurLeechingTorrents =& $LeechingTorrents[$BucketID];
        if ($CurLeechingTorrents === false) {
            $CurTime = time();
            // This bucket hasn't been checked before
            $CurLeechingTorrents = G::$Cache->get_value("users_leeching_{$UserID}_$BucketID", true);
            if ($CurLeechingTorrents === false || $CurTime > $UpdateTime['next']) {
                $Updated = [];
                $QueryID = G::$DB->get_query_id();
                if ($CurLeechingTorrents === false || $UpdateTime['last'] == 0) {
                    for ($i = 0; $i < $Buckets; $i++) {
                        $LeechingTorrents[$i] = [];
                    }
                    // Not found in cache. Since we don't have a suitable index, it's faster to update everything
                    G::$DB->query("
            SELECT fid
            FROM xbt_files_users
            WHERE uid = ?
              AND active = 1
              AND Remaining > 0", $UserID);
                    while (list($ID) = G::$DB->next_record(MYSQLI_NUM, false)) {
                        $LeechingTorrents[$ID & $LastBucket][(int)$ID] = true;
                    }
                    $Updated = array_fill(0, $Buckets, true);
                } elseif (isset($CurLeechingTorrents[$TorrentID])) {
                    // Old cache, but torrent is leeching, so no need to update
                    return true;
                } else {
                    // Old cache, check if torrent has been leeching recently
                    G::$DB->query("
            SELECT fid
            FROM xbt_files_users
            WHERE uid = ?
              AND active = 1
              AND Remaining > 0
              AND mtime >= ?", $UserID, $UpdateTime['last']);
                    while (list($ID) = G::$DB->next_record(MYSQLI_NUM, false)) {
                        $CurBucketID = $ID & $LastBucket;
                        if ($LeechingTorrents[$CurBucketID] === false) {
                            $LeechingTorrents[$CurBucketID] = G::$Cache->get_value("users_leeching_{$UserID}_$CurBucketID", true);
                            if ($LeechingTorrents[$CurBucketID] === false) {
                                $LeechingTorrents[$CurBucketID] = [];
                            }
                        }
                        $LeechingTorrents[$CurBucketID][(int)$ID] = true;
                        $Updated[$CurBucketID] = true;
                    }
                }
                G::$DB->set_query_id($QueryID);
                for ($i = 0; $i < $Buckets; $i++) {
                    if (isset($Updated[$i])) {
                        G::$Cache->cache_value("users_leeching_{$UserID}_$i", $LeechingTorrents[$i], 3600);
                    }
                }
                $UpdateTime['last'] = $CurTime;
                $UpdateTime['next'] = $CurTime + self::SNATCHED_UPDATE_INTERVAL;
                G::$Cache->cache_value("users_leeching_{$UserID}_time", $UpdateTime, 3600);
            }
        }
        return isset($CurLeechingTorrents[$TorrentID]);
    }

    /*
    public static function is_seeding_or_leeching($TorrentID) {
      if (empty(G::$LoggedUser))
        return false;

      $UserID = G::$LoggedUser['ID'];
      $Result = array("IsSeeding" => false, "IsLeeching" => false);

      $QueryID = G::$DB->get_query_id();

      G::$DB->query("
        SELECT Remaining
        FROM xbt_files_users
        WHERE fid = $TorrentID
          AND uid = $UserID
          AND active = 1");
      if (G::$DB->has_results()) {
        while (($Row = G::$DB->next_record(MYSQLI_ASSOC, true)) && !($Result['IsSeeding'] && $Result['IsLeeching'])) {
          if ($Row['Remaining'] == 0)
            $Result['IsSeeding'] = true;
          if ($Row['Remaining'] > 0)
            $Result['IsLeeching'] = true;
        }
      }

      G::$DB->set_query_id($QueryID);

      return $Result;
    }
    */

    /**
     * Change the schedule for when the next update to a user's cached snatch list should be performed.
     * By default, the change will only be made if the new update would happen sooner than the current
     * @param int $Time Seconds until the next update
     * @param bool $Force Whether to accept changes that would push back the update
     */
    public static function set_snatch_update_time($UserID, $Time, $Force = false)
    {
        if (!$UpdateTime = G::$Cache->get_value("users_snatched_{$UserID}_time")) {
            return;
        }
        $NextTime = time() + $Time;
        if ($Force || $NextTime < $UpdateTime['next']) {
            // Skip if the change would delay the next update
            $UpdateTime['next'] = $NextTime;
            G::$Cache->cache_value("users_snatched_{$UserID}_time", $UpdateTime, 0);
        }
    }

    // Some constants for self::display_string's $Mode parameter
  const DISPLAYSTRING_HTML = 1; // Whether or not to use HTML for the output (e.g. VH tooltip)
  const DISPLAYSTRING_ARTISTS = 2; // Whether or not to display artists
  const DISPLAYSTRING_YEAR = 4; // Whether or not to display the group's year
  const DISPLAYSTRING_VH = 8; // Whether or not to display the VH flag
  const DISPLAYSTRING_RELEASETYPE = 16; // Whether or not to display the release type
  const DISPLAYSTRING_LINKED = 33; // Whether or not to link artists and the group
  // The constant for linking is 32, but because linking only works with HTML, this constant is defined as 32|1 = 33, i.e. LINKED also includes HTML
  // Keep this in mind when defining presets below!

  // Presets to facilitate the use of $Mode
  const DISPLAYSTRING_DEFAULT = 63; // HTML|ARTISTS|YEAR|VH|RELEASETYPE|LINKED = 63
  const DISPLAYSTRING_SHORT = 6; // Very simple format, only artists and year, no linking (e.g. for forum thread titles)

  /**
   * Return the display string for a given torrent group $GroupID.
   * @param int $GroupID
   * @return string
   */
    public static function display_string($GroupID, $Mode = self::DISPLAYSTRING_DEFAULT)
    {
        global $ReleaseTypes; // I hate this

        $GroupInfo = self::get_groups(array($GroupID), true, true, false)[$GroupID];
        $ExtendedArtists = $GroupInfo['ExtendedArtists'];

        if ($Mode & self::DISPLAYSTRING_ARTISTS) {
            if (!empty($ExtendedArtists[1])
        || !empty($ExtendedArtists[4])
        || !empty($ExtendedArtists[5])
        || !empty($ExtendedArtists[6])
      ) {
                unset($ExtendedArtists[2], $ExtendedArtists[3]);
                $DisplayName = Artists::display_artists($ExtendedArtists, ($Mode & self::DISPLAYSTRING_LINKED));
            } else {
                $DisplayName = '';
            }
        }

        if ($Mode & self::DISPLAYSTRING_LINKED) {
            $DisplayName .= "<a href=\"torrents.php?id=$GroupID\" class=\"tooltip\" title=\"View torrent group\" dir=\"ltr\">$GroupInfo[Name]</a>";
        } else {
            $DisplayName .= $GroupInfo['Name'];
        }

        if (($Mode & self::DISPLAYSTRING_YEAR) && $GroupInfo['Year'] > 0) {
            $DisplayName .= " [$GroupInfo[Year]]";
        }

        if (($Mode & self::DISPLAYSTRING_RELEASETYPE) && $GroupInfo['ReleaseType'] > 0) {
            $DisplayName .= ' ['.$ReleaseTypes[$GroupInfo['ReleaseType']].']';
        }

        return $DisplayName;
    }

    public static function edition_string(array $Torrent, array $Group)
    {
        $AddExtra = ' / ';
        $EditionName = 'Original Release';
        $EditionName .= $AddExtra . display_str($Torrent['Media']);
        return $EditionName;
    }

    //Used to get reports info on a unison cache in both browsing pages and torrent pages.
    public static function get_reports($TorrentID)
    {
        $Reports = G::$Cache->get_value("reports_torrent_$TorrentID");
        if ($Reports === false) {
            $QueryID = G::$DB->get_query_id();
            G::$DB->query("
        SELECT
          ID,
          ReporterID,
          Type,
          UserComment,
          ReportedTime
        FROM reportsv2
        WHERE TorrentID = ?
          AND Status != 'Resolved'", $TorrentID);
            $Reports = G::$DB->to_array(false, MYSQLI_ASSOC, false);
            G::$DB->set_query_id($QueryID);
            G::$Cache->cache_value("reports_torrent_$TorrentID", $Reports, 0);
        }
        if (!check_perms('admin_reports')) {
            $Return = [];
            foreach ($Reports as $Report) {
                if ($Report['Type'] !== 'edited') {
                    $Return[] = $Report;
                }
            }
            return $Return;
        }
        return $Reports;
    }
}