playlist.php

<?php
/* vim:set softtabstop=4 shiftwidth=4 expandtab: */
/**
 *
 * LICENSE: GNU Affero General Public License, version 3 (AGPL-3.0-or-later)
 * Copyright 2001 - 2020 Ampache.org
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 */

// This is playlist.php, it does playlist things.
$a_root = realpath(__DIR__);
require_once $a_root . '/lib/init.php';

// We special-case this so we can send a 302 if the delete succeeded
if (Core::get_request('action') == 'delete_playlist') {
    // Check rights
    $playlist = new Playlist($_REQUEST['playlist_id']);
    if ($playlist->has_access()) {
        $playlist->delete();
        // Go elsewhere
        header('Location: ' . AmpConfig::get('web_path') . '/browse.php?action=playlist');

        return false;
    }
}

UI::show_header();

// Switch on the actions
switch ($_REQUEST['action']) {
    case 'create_playlist':
        /* Check rights */
        if (!Access::check('interface', 25)) {
            UI::access_denied();
            break;
        }

        $playlist_name = (string) scrub_in($_REQUEST['playlist_name']);
        $playlist_type = (string) scrub_in(filter_input(INPUT_GET, 'type', FILTER_SANITIZE_SPECIAL_CHARS));

        $playlist_id                     = Playlist::create($playlist_name, $playlist_type);
        $_SESSION['data']['playlist_id'] = $playlist_id;
        show_confirmation(T_('Playlist created'),
                /* HINT: %1 playlist name, %2 playlist type */
                sprintf(T_('%1$s (%2$s) has been created'), $playlist_name, $playlist_type),
                'playlist.php');
        break;
    case 'delete_playlist':
        // If we made it here, we didn't have sufficient rights.
        UI::access_denied();
        break;
    case 'show_playlist':
        $playlist = new Playlist($_REQUEST['playlist_id']);
        $playlist->format();
        $object_ids = $playlist->get_items();
        require_once AmpConfig::get('prefix') . UI::find_template('show_playlist.inc.php');
        break;
    case 'show_import_playlist':
        require_once AmpConfig::get('prefix') . UI::find_template('show_import_playlist.inc.php');
        break;
    case 'import_playlist':
        /* first we rename the file to it's original name before importing.
        Otherwise the playlist name will have the $_FILES['filename']['tmp_name'] which doesn't look right... */
        $dir      = dirname($_FILES['filename']['tmp_name']) . "/";
        $filename = $dir . basename($_FILES['filename']['name']);
        move_uploaded_file($_FILES['filename']['tmp_name'], $filename);

        $result = Catalog::import_playlist($filename);

        if ($result['success']) {
            $url   = 'show_playlist&amp;playlist_id=' . $result['id'];
            $title = T_('No Problem');
            $body  = basename($_FILES['filename']['name']);
            $body .= '<br />' .
                /* HINT: Number of songs */
                sprintf(nT_('Successfully imported playlist with %d song.', 'Successfully imported playlist with %d songs.', $result['count']), $result['count']);
        } else {
            $url   = 'show_import_playlist';
            $title = T_("There Was a Problem");
            $body  = T_('The Playlist could not be imported') . ': ' . $result['error'];
        }
        show_confirmation($title, $body, AmpConfig::get('web_path') . '/playlist.php?action=' . $url);
        break;
    case 'set_track_numbers':
        debug_event('playlist', 'Set track numbers called.', 5);

        $playlist = new Playlist($_REQUEST['playlist_id']);
        /* Make sure they have permission */
        if (!$playlist->has_access()) {
            UI::access_denied();
            break;
        }

        // Retrieving final song order from url
        foreach ($_GET as $key => $data) {
            $_GET[$key] = unhtmlentities((string) scrub_in($data));
            debug_event('playlist', $key . '=' . Core::get_get($key), 5);
        }

        if (filter_has_var(INPUT_GET, 'order')) {
            $songs = explode(";", $_GET['order']);
            $track = $_GET['offset'] ? ((int) ($_GET['offset']) + 1) : 1;
            foreach ($songs as $song_id) {
                if ($song_id != '') {
                    $playlist->update_track_number((int) $song_id, $track);
                    ++$track;
                }
            }
        }
        break;
    case 'add_song':
        $playlist = new Playlist($_REQUEST['playlist_id']);
        if (!$playlist->has_access()) {
            UI::access_denied();
            break;
        }

        $playlist->add_songs(array($_REQUEST['song_id']), true);
        break;
    case 'prune_empty':
        if (!Core::get_global('user')->has_access(100)) {
            UI::access_denied();
            break;
        }

        prune_empty_playlists();
        $url   = AmpConfig::get('web_path') . '/playlist.php';
        $title = T_('No Problem');
        $body  = T_('Empty Playlists have been deleted');
        show_confirmation($title, $body, $url);
        break;
    case 'remove_duplicates':
        debug_event('playlist', 'Remove duplicates called.', 4);

        $playlist = new Playlist($_REQUEST['playlist_id']);
        /* Make sure they have permission */
        if (!$playlist->has_access()) {
            UI::access_denied();
            break;
        }

        $tracks_to_rm = array();
        $map          = array();
        $items        = $playlist->get_items();
        foreach ($items as $item) {
            if (!array_key_exists($item['object_type'], $map)) {
                $map[$item['object_type']] = array();
            }
            if (!in_array($item['object_id'], $map[$item['object_type']])) {
                $map[$item['object_type']][] = $item['object_id'];
            } else {
                $tracks_to_rm[] = $item['track_id'];
            }
        }

        foreach ($tracks_to_rm as $track_id) {
            $playlist->delete_track($track_id);
        }
        $object_ids = $playlist->get_items();
        require_once AmpConfig::get('prefix') . UI::find_template('show_playlist.inc.php');
        break;
    case 'sort_tracks':
        $playlist = new Playlist($_REQUEST['playlist_id']);
        if (!$playlist->has_access()) {
            UI::access_denied();
            break;
        }

        /* Sort the tracks */
        $playlist->sort_tracks();
        $object_ids = $playlist->get_items();
        require_once AmpConfig::get('prefix') . UI::find_template('show_playlist.inc.php');
        break;
    default:
        require_once AmpConfig::get('prefix') . UI::find_template('show_playlist.inc.php');
        break;
} // switch on the action

// Show the Footer
UI::show_query_stats();
UI::show_footer();