PHP Rating::get_average_rating方法代码示例

 private static function addVideo(SimpleXMLElement $xml, Video $video, $details = false)
 {
     $id = self::getVideoId($video->id);
     $xvid = $xml->addChild('Video');
     $xvid->addAttribute('ratingKey', $id);
     $xvid->addAttribute('key', self::getMetadataUri($id));
     $xvid->addAttribute('title', $video->f_title);
     if ($video->release_date) {
         $year = date('Y', $video->release_date);
         if ($year) {
             $xvid->addAttribute('year', $year);
         }
         $xvid->addAttribute('originallyAvailableAt', $video->f_release_date);
     }
     $rating = new Rating($video->id, "video");
     $rating_value = $rating->get_average_rating();
     if ($rating_value > 0) {
         $xvid->addAttribute('rating', intval($rating_value * 2));
     }
     $time = $video->time * 1000;
     $xvid->addAttribute('duration', $time);
     $xvid->addAttribute('addedAt', '');
     $xvid->addAttribute('updatedAt', '');
     $xvid->addAttribute('thumb', self::getMetadataUri($id) . '/thumb/' . $id);
     $xmedia = $xvid->addChild('Media');
     $xmedia->addAttribute('id', $id);
     // Same ID that video => OK?
     $xmedia->addAttribute('duration', $time);
     $xmedia->addAttribute('bitrate', intval($video->bitrate / 1000));
     $xmedia->addAttribute('audioChannels', $video->channels);
     // Type != Codec != Container, but that's how Ampache works today...
     $xmedia->addAttribute('audioCodec', $video->audio_codec);
     $xmedia->addAttribute('videoCodec', $video->video_codec);
     $xmedia->addAttribute('container', $video->type);
     $xmedia->addAttribute('width', $video->resolution_x);
     $xmedia->addAttribute('height', $video->resolution_y);
     //$xmedia->addAttribute('videoResolution', 'sd'); // TODO
     //$xmedia->addAttribute('aspectRatio', '1.78'); // TODO
     $xmedia->addAttribute('videoFrameRate', intval(ceil($video->frame_rate)) . 'p');
     $xpart = $xmedia->addChild('Part');
     $partid = self::getPartId($id);
     $xpart->addAttribute('id', $partid);
     $xpart->addAttribute('key', self::getPartUri($partid, $video->type));
     $xpart->addAttribute('duration', $time);
     $xpart->addAttribute('file', $video->file);
     $xpart->addAttribute('size', $video->size);
     $xpart->addAttribute('container', $video->type);
     // TODO: support Writer/Director tags here as part of Video/
     /*
     <Writer tag="Grant Scharbo" />
     <Writer tag="Richard Hatem" />
     <Director tag="Terry McDonough" />
     */
     $tags = Tag::get_top_tags('video', $video->id);
     if (is_array($tags)) {
         foreach ($tags as $tag_id => $tag) {
             $xgenre = $xvid->addChild('Genre');
             $xgenre->addAttribute('id', $tag['id']);
             $xgenre->addAttribute('tag', $tag['name']);
         }
     }
     if ($details) {
         // Subtitles
         $subtitles = $video->get_subtitles();
         foreach ($subtitles as $subtitle) {
             $streamid = hexdec(bin2hex($subtitle['lang_code'])) . $partid;
             $xstream = $xpart->addChild('Stream');
             $xstream->addAttribute('id', $streamid);
             $xstream->addAttribute('key', '/library/streams/' . $streamid);
             $xstream->addAttribute('streamType', '3');
             $xstream->addAttribute('codec', 'srt');
             $xstream->addAttribute('language', $subtitle['lang_name']);
             $xstream->addAttribute('languageCode', $subtitle['lang_code']);
             $xstream->addAttribute('format', 'srt');
         }
         // TODO: support real audio/video streams!
         /*
         <Stream id="93" streamType="1" codec="mpeg4" index="0" bitrate="833" bitDepth="8" chromaSubsampling="4:2:0" colorSpace="yuv" duration="2989528" frameRate="23,976" gmc="0" height="352" level="5" profile="asp" qpel="0" scanType="progressive" width="624" />
         <Stream id="94" streamType="2" selected="1" codec="mp3" index="1" channels="2" bitrate="135" bitrateMode="vbr" duration="2989488" samplingRate="48000" />
         */
     }
     return $xvid;
 }

 public static function createSong($xml, $song, $elementName = 'song')
 {
     $xsong = $xml->addChild(htmlspecialchars($elementName));
     $xsong->addAttribute('id', self::getSongId($song->id));
     $xsong->addAttribute('parent', self::getAlbumId($song->album));
     //$xsong->addAttribute('created', );
     $xsong->addAttribute('title', $song->title);
     $xsong->addAttribute('isDir', 'false');
     $xsong->addAttribute('isVideo', 'false');
     $xsong->addAttribute('type', 'music');
     $album = new Album($song->album);
     $xsong->addAttribute('albumId', self::getAlbumId($album->id));
     $xsong->addAttribute('album', $album->name);
     $artist = new Artist($song->artist);
     $xsong->addAttribute('artistId', self::getArtistId($song->artist));
     $xsong->addAttribute('artist', $artist->name);
     $xsong->addAttribute('coverArt', self::getAlbumId($album->id));
     $xsong->addAttribute('duration', $song->time);
     $xsong->addAttribute('bitRate', intval($song->bitrate / 1000));
     $rating = new Rating($song->id, "song");
     $user_rating = $rating->get_user_rating();
     if ($user_rating > 0) {
         $xsong->addAttribute('userRating', ceil($user_rating));
     }
     $avg_rating = $rating->get_average_rating();
     if ($avg_rating > 0) {
         $xsong->addAttribute('averageRating', ceil($avg_rating));
     }
     if ($song->track > 0) {
         $xsong->addAttribute('track', $song->track);
     }
     if ($song->year > 0) {
         $xsong->addAttribute('year', $song->year);
     }
     $tags = Tag::get_object_tags('song', $song->id);
     if (count($tags) > 0) {
         $xsong->addAttribute('genre', $tags[0]['name']);
     }
     $xsong->addAttribute('size', $song->size);
     if ($album->disk > 0) {
         $xsong->addAttribute('discNumber', $album->disk);
     }
     $xsong->addAttribute('suffix', $song->type);
     $xsong->addAttribute('contentType', $song->mime);
     // Create a clean fake path instead of song real file path to have better offline mode storage on Subsonic clients
     $path = $artist->name . '/' . $album->name . '/' . basename($song->file);
     $xsong->addAttribute('path', $path);
     // Set transcoding information if required
     $transcode_cfg = AmpConfig::get('transcode');
     $valid_types = Song::get_stream_types_for_type($song->type, 'api');
     if ($transcode_cfg == 'always' || $transcode_cfg != 'never' && !in_array('native', $valid_types)) {
         $transcode_settings = $song->get_transcode_settings(null, 'api');
         if ($transcode_settings) {
             $transcode_type = $transcode_settings['format'];
             $xsong->addAttribute('transcodedSuffix', $transcode_type);
             $xsong->addAttribute('transcodedContentType', Song::type_to_mime($transcode_type));
         }
     }
     return $xsong;
 }

 private static function tlv_songs($songs, $meta)
 {
     if (array_search('all', $meta) > -1) {
         $meta = self::$metas;
     }
     $lo = '';
     foreach ($songs as $song) {
         $song->format();
         $o = self::tlv('dmap.itemkind', 2);
         $o .= self::tlv('dmap.itemid', $song->id);
         foreach ($meta as $m) {
             switch ($m) {
                 case 'dmap.itemname':
                     $o .= self::tlv($m, $song->f_title);
                     break;
                 case 'dmap.containeritemid':
                     /* case 'dmap.persistentid': */
                     $o .= self::tlv($m, $song->id);
                     break;
                 case 'daap.songalbum':
                     $o .= self::tlv($m, $song->f_album);
                     break;
                 case 'daap.songartist':
                     $o .= self::tlv($m, $song->f_artist);
                     break;
                 case 'daap.songbitrate':
                     $o .= self::tlv($m, intval($song->bitrate / 1000));
                     break;
                 case 'daap.songcomment':
                     $o .= self::tlv($m, $song->comment);
                     break;
                 case 'daap.songdateadded':
                     $o .= self::tlv($m, $song->addition_time);
                     break;
                 case 'daap.songdatemodified':
                     if ($song->update_time) {
                         $o .= self::tlv($m, $song->update_time);
                     }
                     break;
                 case 'daap.songdiscnumber':
                     $album = new Album($song->album);
                     $o .= self::tlv($m, $album->disk);
                     break;
                 case 'daap.songformat':
                     $o .= self::tlv($m, $song->type);
                     break;
                 case 'daap.songgenre':
                     $o .= self::tlv($m, Tag::get_display($song->tags, false, 'song'));
                     break;
                 case 'daap.songsamplerate':
                     $o .= self::tlv($m, $song->rate);
                     break;
                 case 'daap.songsize':
                     $o .= self::tlv($m, $song->size);
                     break;
                 case 'daap.songtime':
                     $o .= self::tlv($m, $song->time * 1000);
                     break;
                 case 'daap.songtracknumber':
                     $o .= self::tlv($m, $song->track);
                     break;
                 case 'daap.songuserrating':
                     $rating = new Rating($song->id, "song");
                     $rating_value = $rating->get_average_rating();
                     $o .= self::tlv($m, $rating_value);
                     break;
                 case 'daap.songyear':
                     $o .= self::tlv($m, $song->year);
                     break;
             }
         }
         $lo .= self::tlv('dmap.listingitem', $o);
     }
     return $lo;
 }

 /**
  * democratic
  *
  * This handles creating an xml document for democratic items, this can be a little complicated
  * due to the votes and all of that
  *
  * @param    array    $object_ids    Object IDs
  * @return    string    return xml
  */
 public static function democratic($object_ids = array())
 {
     if (!is_array($object_ids)) {
         $object_ids = array();
     }
     $democratic = Democratic::get_current_playlist();
     $string = '';
     foreach ($object_ids as $row_id => $data) {
         $song = new $data['object_type']($data['object_id']);
         $song->format();
         //FIXME: This is duplicate code and so wrong, functions need to be improved
         $tag = new Tag($song->tags['0']);
         $song->genre = $tag->id;
         $song->f_genre = $tag->name;
         $tag_string = self::tags_string($song->tags);
         $rating = new Rating($song->id, 'song');
         $art_url = Art::url($song->album, 'album', $_REQUEST['auth']);
         $string .= "<song id=\"" . $song->id . "\">\n" . "\t<title><![CDATA[" . $song->title . "]]></title>\n" . "\t<artist id=\"" . $song->artist . "\"><![CDATA[" . $song->f_artist_full . "]]></artist>\n" . "\t<album id=\"" . $song->album . "\"><![CDATA[" . $song->f_album_full . "]]></album>\n" . "\t<genre id=\"" . $song->genre . "\"><![CDATA[" . $song->f_genre . "]]></genre>\n" . $tag_string . "\t<track>" . $song->track . "</track>\n" . "\t<time>" . $song->time . "</time>\n" . "\t<mime>" . $song->mime . "</mime>\n" . "\t<url><![CDATA[" . Song::play_url($song->id, '', 'api') . "]]></url>\n" . "\t<size>" . $song->size . "</size>\n" . "\t<art><![CDATA[" . $art_url . "]]></art>\n" . "\t<preciserating>" . $rating->get_user_rating() . "</preciserating>\n" . "\t<rating>" . $rating->get_user_rating() . "</rating>\n" . "\t<averagerating>" . $rating->get_average_rating() . "</averagerating>\n" . "\t<vote>" . $democratic->get_vote($row_id) . "</vote>\n" . "</song>\n";
     }
     // end foreach
     $final = self::_header() . $string . self::_footer();
     return $final;
 }

 public static function addAlbum($xml, $album, $songs = false, $elementName = "album")
 {
     $xalbum = $xml->addChild($elementName);
     $xalbum->addAttribute('id', self::getAlbumId($album->id));
     $xalbum->addAttribute('album', $album->name);
     $xalbum->addAttribute('title', self::formatAlbum($album));
     $xalbum->addAttribute('name', $album->name);
     $xalbum->addAttribute('isDir', 'true');
     $album->format();
     if ($album->has_art) {
         $xalbum->addAttribute('coverArt', self::getAlbumId($album->id));
     }
     $xalbum->addAttribute('songCount', $album->song_count);
     $xalbum->addAttribute('duration', $album->total_duration);
     $xalbum->addAttribute('artistId', self::getArtistId($album->artist_id));
     $xalbum->addAttribute('parent', self::getArtistId($album->artist_id));
     $xalbum->addAttribute('artist', $album->artist_name);
     $rating = new Rating($album->id, "album");
     $rating_value = $rating->get_average_rating();
     $xalbum->addAttribute('averageRating', $rating_value ? $rating_value : 0);
     if ($songs) {
         $allsongs = $album->get_songs();
         foreach ($allsongs as $id) {
             $song = new Song($id);
             self::addSong($xalbum, $song);
         }
     }
 }

 public static function addSong($xml, $song)
 {
     $xdir = $xml->addChild('Track');
     self::addSongMeta($xdir, $song);
     $time = $song->time * 1000;
     $xdir->addAttribute('title', $song->title);
     $albumid = self::getAlbumId($song->album);
     $album = new Album($song->album);
     $xdir->addAttribute('parentRatingKey', $albumid);
     $xdir->addAttribute('parentKey', self::getMetadataUri($albumid));
     $xdir->addAttribute('originalTitle', $album->f_name);
     $xdir->addAttribute('summary', '');
     $xdir->addAttribute('index', $song->track);
     $xdir->addAttribute('duration', $time);
     $xdir->addAttribute('type', 'track');
     $xdir->addAttribute('addedAt', '');
     $xdir->addAttribute('updatedAt', '');
     $rating = new Rating($song->id, "song");
     $rating_value = $rating->get_average_rating();
     if ($rating_value > 0) {
         $xdir->addAttribute('rating', intval($rating_value * 2));
     }
     $xmedia = $xdir->addChild('Media');
     $mediaid = self::getMediaId($song->id);
     $xmedia->addAttribute('id', $mediaid);
     $xmedia->addAttribute('duration', $time);
     $xmedia->addAttribute('bitrate', intval($song->bitrate / 1000));
     $xmedia->addAttribute('audioChannels', '');
     // Type != Codec != Container, but that's how Ampache works today...
     $xmedia->addAttribute('audioCodec', $song->type);
     $xmedia->addAttribute('container', $song->type);
     $xpart = $xmedia->addChild('Part');
     $partid = self::getPartId($song->id);
     $xpart->addAttribute('id', $partid);
     $xpart->addAttribute('key', self::getPartUri($partid, $song->type));
     $xpart->addAttribute('duration', $time);
     $xpart->addAttribute('file', $song->file);
     $xpart->addAttribute('size', $song->size);
     $xpart->addAttribute('container', $song->type);
 }