mirror of
https://github.com/Yetangitu/ampache
synced 2025-10-03 17:59:21 +02:00
350 lines
12 KiB
PHP
350 lines
12 KiB
PHP
<?php
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/*
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Copyright (c) 2001 - 2007 Ampache.org
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All rights reserved.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License v2
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as published by the Free Software Foundation.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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/**
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* Democratic
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* This class handles democratic play, which is a fancy
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* name for voting based playback. This extends the tmpplaylist
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*/
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class Democratic extends tmpPlaylist {
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/**
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* get_playlists
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* This returns all of the current valid 'Democratic' Playlists
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* that have been created.
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*/
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public static function get_playlists() {
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// Pull all tmp playlsits with a session of < 0 (as those are fake)
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// This is kind of hackish, should really think about tweaking the db
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// and doing this right.
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$sql = "SELECT `id` FROM `tmp_playlist` WHERE `session`< '0'";
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$db_results = Dba::query($sql);
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$results = array();
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while ($row = Dba::fetch_assoc($db_results)) {
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$results[] = $row['id'];
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}
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return $results;
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} // get_playlists
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/**
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* get_current_playlist
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* This returns the curren users current playlist, or if specified
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* this current playlist of the user
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*/
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public static function get_current_playlist($user_id='') {
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// If not passed user global
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$user_id = $user_id ? $user_id : $GLOBALS['user']->id;
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/* Find the - 1 one for now */
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$sql = "SELECT `id` FROM `tmp_playlist` WHERE `session`='-1'";
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$db_results = Dba::query($sql);
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$row = Dba::fetch_assoc($db_results);
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$object = new Democratic($row['id']);
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return $object;
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} // get_current_playlist
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/**
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* get_items
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* This returns an array of all object_ids currently in this tmpPlaylist. This
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* has gotten a little more complicated because of type, the values are an array
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* 0 being ID 1 being TYPE
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* FIXME: This is too complex, it makes my brain hurt
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* [VOTE COUNT]
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* [DATE OF NEWEST VOTE]
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* [ROW ID]
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* [OBJECT_ID]
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* [OBJECT_TYPE]
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*
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* Sorting does the following
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* sort largest VOTE COUNT to top
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* sort smallest DATE OF NEWEST VOTE]
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*/
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public function get_items() {
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$order = "ORDER BY `user_vote`.`date` ASC";
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$vote_join = "INNER JOIN `user_vote` ON `user_vote`.`object_id`=`tmp_playlist_data`.`id`";
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/* Select all objects from this playlist */
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$sql = "SELECT `tmp_playlist_data`.`id`,`tmp_playlist_data`.`object_type`, `user_vote`.`date`, `tmp_playlist_data`.`object_id` " .
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"FROM `tmp_playlist_data` $vote_join " .
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"WHERE `tmp_playlist_data`.`tmp_playlist`='" . Dba::escape($this->id) . "' $order";
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$db_results = Dba::query($sql);
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/* Define the array */
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$items = array();
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$votes = array();
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// Itterate and build the sortable array
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while ($results = Dba::fetch_assoc($db_results)) {
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// First build a variable that holds the number of votes for an object
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$name = 'vc_' . $results['object_id'];
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// Check if the vote is older then our current vote for this object
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if ($votes[$results['object_id']] < $results['date'] OR !isset($votes[$results['object_id']])) {
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$votes[$results['object_id']] = $results['date'];
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}
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// Append oen to the vote
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${$name}++;
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$primary_key = ${$name};
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$secondary_key = $votes[$results['object_id']];
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$items[$primary_key][$secondary_key][$results['id']] = array($results['object_id'],$results['object_type'],$results['id']);
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}
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// Sort highest voted stuff to the top
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krsort($items);
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// re-collapse the array
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foreach ($items as $vote_count=>$date_array) {
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ksort($date_array);
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foreach ($date_array as $object_array) {
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foreach ($object_array as $key=>$sorted_array) {
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$sorted_items[$key] = $sorted_array;
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}
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}
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}
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return $sorted_items;
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} // get_items
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/**
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* get_url
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* This returns the special play URL for democratic play, only open to ADMINs
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*/
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public function get_url() {
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$link = Config::get('web_path') . '/play/index.php?demo_id=' . scrub_out($this->id) .
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'&sid=' . Stream::get_session() . '&uid=' . scrub_out($GLOBALS['user']->id);
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return $link;
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} // get_url
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/**
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* get_next_object
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* This returns the next object in the tmp_playlist most of the time this
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* will just be the top entry, but if there is a base_playlist and no
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* items in the playlist then it returns a random entry from the base_playlist
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*/
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public function get_next_object($offset='') {
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$offset = $offset ? intval($offset) : '0';
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// We have to get all because of the pysco sorting
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$items = self::get_items();
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if (count($items)) {
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$array = array_slice($items,$offset,1);
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$item = array_shift($array);
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$results['object_id'] = $item['0'];
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}
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/* If nothing was found and this is a voting playlist then get from base_playlist */
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if (!$results['object_id']) {
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/* Check for a playlist */
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if ($this->base_playlist) {
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/* We need to pull a random one from the base_playlist */
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$base_playlist = new Playlist($this->base_playlist);
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$data = $base_playlist->get_random_items(1);
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$results['object_id'] = $data['0']['object_id'];
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}
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else {
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$sql = "SELECT `id` as `object_id` FROM `song` WHERE `enabled`='1' ORDER BY RAND() LIMIT 1";
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$db_results = Dba::query($sql);
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$results = Dba::fetch_assoc($db_results);
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}
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}
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return $results['object_id'];
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} // get_next_object
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/**
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* get_uid_from_object_id
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* This takes an object_id and an object type and returns the ID for the row
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*/
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public function get_uid_from_object_id($object_id,$object_type='') {
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$object_id = Dba::escape($object_id);
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$object_type = $object_type ? Dba::escape($object_type) : 'song';
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$tmp_id = Dba::escape($this->id);
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$sql = "SELECT `tmp_playlist_data`.`id` FROM `tmp_playlist_data` WHERE `object_type`='$object_type' AND " .
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"`tmp_playlist`='$tmp_id' AND `object_id`='$object_id'";
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$db_results = Dba::query($sql);
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$row = Dba::fetch_assoc($db_results);
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return $row['id'];
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} // get_uid_from_object_id
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/**
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* vote
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* This function is called by users to vote on a system wide playlist
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* This adds the specified objects to the tmp_playlist and adds a 'vote'
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* by this user, naturally it checks to make sure that the user hasn't
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* already voted on any of these objects
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*/
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public function vote($items) {
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/* Itterate through the objects if no vote, add to playlist and vote */
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foreach ($items as $type=>$object_id) {
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//FIXME: This is a hack until we fix everything else
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if (intval($type) == $type) { $type = 'song'; }
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if (!$this->has_vote($object_id,$type)) {
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$this->add_vote($object_id,$type);
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}
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} // end foreach
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} // vote
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/**
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* has_vote
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* This checks to see if the current user has already voted on this object
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*/
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public function has_vote($object_id,$type='') {
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$tmp_id = Dba::escape($this->id);
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$object_id = Dba::escape($object_id);
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$type = $type ? Dba::escape($type) : 'song';
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$user_id = Dba::escape($GLOBALS['user']->id);
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/* Query vote table */
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$sql = "SELECT tmp_playlist_data.object_id FROM `user_vote` " .
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"INNER JOIN tmp_playlist_data ON tmp_playlist_data.id=user_vote.object_id " .
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"WHERE user_vote.user='$user_id' AND tmp_playlist_data.object_type='$type' " .
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"AND tmp_playlist_data.object_id='$object_id' " .
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"AND tmp_playlist_data.tmp_playlist='$tmp_id'";
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$db_results = Dba::query($sql);
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/* If we find row, they've voted!! */
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if (Dba::num_rows($db_results)) {
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return true;
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}
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return false;
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} // has_vote
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/**
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* add_vote
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* This takes a object id and user and actually inserts the row
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*/
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public function add_vote($object_id,$object_type='') {
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$object_id = Dba::escape($object_id);
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$tmp_playlist = Dba::escape($this->id);
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$object_type = $object_type ? Dba::escape($object_type) : 'song';
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/* If it's on the playlist just vote */
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$sql = "SELECT `id` FROM `tmp_playlist_data` " .
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"WHERE `tmp_playlist_data`.`object_id`='$object_id' AND `tmp_playlist_data`.`tmp_playlist`='$tmp_playlist'";
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$db_results = Dba::query($sql);
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/* If it's not there, add it and pull ID */
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if (!$results = Dba::fetch_assoc($db_results)) {
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$sql = "INSERT INTO `tmp_playlist_data` (`tmp_playlist`,`object_id`,`object_type`) " .
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"VALUES ('$tmp_playlist','$object_id','$object_type')";
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$db_results = Dba::query($sql);
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$results['id'] = Dba::insert_id();
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}
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/* Vote! */
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$time = time();
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$sql = "INSERT INTO user_vote (`user`,`object_id`,`date`) " .
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"VALUES ('" . Dba::escape($GLOBALS['user']->id) . "','" . $results['id'] . "','$time')";
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$db_results = Dba::query($sql);
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return true;
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} // add_vote
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/**
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* remove_vote
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* This is called to remove a vote by a user for an object, it uses the object_id
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* As that's what we'll have most the time, no need to check if they've got an existing
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* vote for this, just remove anything that is there
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*/
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public function remove_vote($row_id) {
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$object_id = Dba::escape($row_id);
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$user_id = Dba::escape($GLOBALS['user']->id);
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$sql = "DELETE FROM `user_vote` WHERE `object_id`='$object_id'";
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$db_results = Dba::query($sql);
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/* Clean up anything that has no votes */
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self::prune_tracks();
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return true;
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} // remove_vote
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/**
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* delete_votes
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* This removes the votes for the specified object on the current playlist
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*/
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public function delete_votes($row_id) {
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$row_id = Dba::escape($row_id);
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$sql = "DELETE FROM `user_vote` WHERE `object_id`='$row_id'";
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$db_results = Dba::query($sql);
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$sql = "DELETE FROM `tmp_playlist_data` WHERE `id`='$row_id'";
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$db_results = Dba::query($sql);
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return true;
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} // delete_votes
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/**
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* prune_tracks
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* This replaces the normal prune tracks and correctly removes the votes
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* as well
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*/
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public static function prune_tracks() {
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// This deletes data without votes, if it's a voting democratic playlist
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$sql = "DELETE FROM tmp_playlist_data USING tmp_playlist_data " .
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"LEFT JOIN user_vote ON tmp_playlist_data.id=user_vote.object_id " .
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"LEFT JOIN tmp_playlist ON tmp_playlist.id=tmp_playlist.tmp_playlist " .
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"WHERE user_vote.object_id IS NULL AND tmp_playlist.type = 'vote'";
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$db_results = Dba::query($sql);
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return true;
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} // prune_tracks
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} // Democratic class
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?>
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