<?php
/* vim:set softtabstop=4 shiftwidth=4 expandtab: */
/**
 *
 * LICENSE: GNU General Public License, version 2 (GPLv2)
 * Copyright 2001 - 2015 Ampache.org
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License v2
 * as published by the Free Software Foundation.
 *
 * 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 */

class Ampachelibrefm
{
    public $name        = 'Libre.FM';
    public $categories  = 'scrobbling';
    public $description = 'Records your played songs to your Libre.FM Account';
    public $url;
    public $version     = '000003';
    public $min_ampache = '360003';
    public $max_ampache = '999999';

    // These are internal settings used by this class, run this->load to
    // fill them out
    private $challenge;
    private $user_id;
    private $api_key;
    private $secret;
    private $scheme     = 'https';
    private $host       = 'libre.fm';
    private $api_host   = 'libre.fm';

    /**
     * Constructor
     * This function does nothing...
     */
    public function __construct()
    {
        $this->url = $this->scheme.'://'.$this->host;
        return true;
    } // constructor

    /**
     * install
     * This is a required plugin function. It inserts our preferences
     * into Ampache
     */
    public function install()
    {

        // Check and see if it's already installed (they've just hit refresh, those dorks)
        if (Preference::exists('librefm_user')) {
            return false;
        }

        Preference::insert('librefm_challenge','Libre.FM Submit Challenge','','25','string','internal');
        Preference::insert('librefm_grant_link','Libre.FM Grant URL','','25','string','plugins');

        return true;
    } // install

    /**
     * uninstall
     * This is a required plugin function. It removes our preferences from
     * the database returning it to its original form
     */
    public function uninstall()
    {
        Preference::delete('librefm_challenge');
        Preference::delete('librefm_grant_link');
    } // uninstall

    /**
     * upgrade
     * This is a recommended plugin function
     */
    public function upgrade()
    {
        $from_version = Plugin::get_plugin_version($this->name);
        if ($from_version < 2) {
            Preference::rename('librefm_pass', 'librefm_md5_pass');
        }
        if ($from_version < 3) {
            Preference::delete('librefm_md5_pass');
            Preference::delete('librefm_user');
            Preference::delete('librefm_url');
            Preference::delete('librefm_host');
            Preference::delete('librefm_port');
            Preference::insert('librefm_grant_link','Libre.FM Grant URL','','25','string','plugins');
        }
        return true;
    } // upgrade

    /**
     * save_songplay
     * This takes care of queueing and then submitting the tracks.
     */
    public function save_mediaplay($song)
    {
        // Only support songs
        if (strtolower(get_class($song)) != 'song') {
            return false;
        }

        // Make sure there's actually a session before we keep going
        if (!$this->challenge) {
            debug_event($this->name,'Session key missing','5');
            return false;
        }

        // Before we start let's pull the last song submitted by this user
        $previous = Stats::get_last_song($this->user_id);

        $diff = time() - $previous['date'];

        // Make sure it wasn't within the last min
        if ($diff < 60) {
            debug_event($this->name,'Last song played within ' . $diff . ' seconds, not recording stats','3');
            return false;
        }

        if ($song->time < 30) {
            debug_event($this->name,'Song less then 30 seconds not queueing','3');
            return false;
        }

        // Create our scrobbler and then queue it
        $scrobbler = new scrobbler($this->api_key, $this->scheme, $this->api_host, $this->challenge, $this->secret);

        // Check to see if the scrobbling works by queueing song
        if (!$scrobbler->queue_track($song->f_artist_full,$song->f_album_full,$song->title,time(),$song->time,$song->track)) {
            return false;
        }

        // Go ahead and submit it now
        if (!$scrobbler->submit_tracks()) {
            debug_event($this->name,'Error Submit Failed: ' . $scrobbler->error_msg,'3');
            return false;
        }

        debug_event($this->name,'Submission Successful','5');

        return true;
    } // submit

    /**
     * set_flag
     * This takes care of spreading your love on Libre.fm
     */
    public function set_flag($song, $flagged)
    {
        // Make sure there's actually a session before we keep going
        if (!$this->challenge) {
            debug_event($this->name,'Session key missing','5');
            return false;
        }
        // Create our scrobbler and then queue it
        $scrobbler = new scrobbler($this->api_key, $this->scheme, $this->api_host, $this->challenge, $this->secret);
        if (!$scrobbler->love($flagged, 'song', $song->f_artist_full, $song->title, $song->f_album_full)) {
            debug_event($this->name,'Error Love Failed: ' . $scrobbler->error_msg,'3');
            return false;
        }
        debug_event($this->name,'Sent Love Successfully','5');
        return true;
    } // set_flag

    /**
     * get_session
     * This call the getSession method and properly updates the preferences as needed.
     * This requires a userid so it knows whose crap to update.
     */
    public function get_session($user_id, $token)
    {
        $scrobbler = new scrobbler($this->api_key, $this->scheme, $this->api_host,'', $this->secret);
        $session_key = $scrobbler->get_session_key($token);
        if (!$session_key) {
            debug_event($this->name,'getSession Failed: ' . $scrobbler->error_msg,'3');
            return false;
        }
        $this->challenge = $session_key;

        // Update the preferences
        Preference::update('librefm_challenge',$user_id,$session_key);
        debug_event($this->name,'getSession Successful','3');

        return true;
    } // get_session

    /**
     * load
     * This loads up the data we need into this object, this stuff comes
     * from the preferences.
     */
    public function load($user)
    {
        $this->api_key=AmpConfig::get('lastfm_api_key');
        $this->secret='';
        $user->set_preferences();
        $data = $user->prefs;
        $this->user_id = $user->id;
        // check if user have a session key
        if (strlen(trim($data['librefm_challenge']))) {
            $this->challenge= trim($data['librefm_challenge']);
        } else {
            debug_event($this->name,'No session key, not scrobbling (need to grant Ampache to libre.fm)','5');
            return false;
        }

        return true;
    } // load
} // end Ampachelibrefm
?>