<?php
/* vim:set softtabstop=4 shiftwidth=4 expandtab: */
/**
 *
 * LICENSE: GNU Affero General Public License, version 3 (AGPLv3)
 * Copyright 2001 - 2016 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 <http://www.gnu.org/licenses/>.
 *
 */

/**
 * playlist_object
 * Abstracting out functionality needed by both normal and smart playlists
 */
abstract class playlist_object extends database_object implements library_item
{
    // Database variables
    /**
     * @var int $id
     */
    public $id;
    /**
     * @var string $name
     */
    public $name;
    /**
     * @var int $user
     */
    public $user;
    /**
     * @var string $type
     */
    public $type;

    /**
     * @var string $f_type
     */
    public $f_type;
    /**
     * @var string $f_name
     */
    public $f_name;
    /**
     * @var string $f_user
     */
    public $f_user;

    abstract public function get_items();

    /**
     * format
     * This takes the current playlist object and gussies it up a little
     * bit so it is presentable to the users
     */
    public function format($details = true)
    {
        $this->f_name =  $this->name;
        $this->f_type = ($this->type == 'private') ? UI::get_icon('lock', T_('Private')) : '';

        if ($details) {
            $client = new User($this->user);
            $client->format();
            $this->f_user = $client->f_name;
        }
    } // format

    /**
     * has_access
     * This function returns true or false if the current user
     * has access to this playlist
     */
    public function has_access()
    {
        if (!Access::check('interface', 25)) {
            return false;
        }
        if ($this->user == $GLOBALS['user']->id) {
            return true;
        } else {
            return Access::check('interface', 75);
        }
    } // has_access

    public function get_medias($filter_type = null)
    {
        $medias = $this->get_items();
        if ($filter_type) {
            $nmedias = array();
            foreach ($medias as $media) {
                if ($media['object_type'] == $filter_type) {
                    $nmedias[] = $media;
                }
            }
            $medias = $nmedias;
        }
        return $medias;
    }

    public function get_keywords()
    {
        return array();
    }

    public function get_fullname()
    {
        return $this->f_name;
    }

    public function get_parent()
    {
        return null;
    }

    public function get_childrens()
    {
        $childrens = array();
        $items     = $this->get_items();
        foreach ($items as $item) {
            if (!in_array($item['object_type'], $childrens)) {
                $childrens[$item['object_type']] = array();
            }
            $childrens[$item['object_type']][] = $item['object_id'];
        }

        return $this->get_items();
    }

    public function search_childrens($name)
    {
        return array();
    }

    public function get_user_owner()
    {
        return $this->user;
    }

    public function get_default_art_kind()
    {
        return 'default';
    }

    public function get_description()
    {
        return null;
    }

    public function display_art($thumb = 2, $force = false)
    {
        if (AmpConfig::get('playlist_art')) {
            $medias     = $this->get_medias();
            $media_arts = array();
            foreach ($medias as $media) {
                if (Core::is_library_item($media['object_type'])) {
                    if (!Art::has_db($media['object_id'], $media['object_type'])) {
                        $libitem = new $media['object_type']($media['object_id']);
                        $parent  = $libitem->get_parent();
                        if ($parent !== null) {
                            $media = $parent;
                        } elseif (!$force) {
                            $media = null;
                        }
                    }

                    if ($media !== null) {
                        if (!in_array($media, $media_arts)) {
                            $media_arts[] = $media;
                            if (count($media_arts) >= 4) {
                                break;
                            }
                        }
                    }
                }
            }
            
            foreach ($media_arts as $media) {
                Art::display($media['object_type'], $media['object_id'], $this->get_fullname(), $thumb, $this->link);
            }
        }
    }

    /**
     * get_catalogs
     *
     * Get all catalog ids related to this item.
     * @return int[]
     */
    public function get_catalogs()
    {
        return array();
    }
} // end playlist_object