<?php

require dirname(__FILE__) . '/Twitter/twitter.class.php';
require dirname(__FILE__) . '/Twitter/laconica.class.php';

/**
 * Twitter plugin. Allows tweet (if configured) and twitter commands
 */
class Phergie_Plugin_Twitter extends Phergie_Plugin_Abstract_Command
{
    /**
     * Twitter object
     */
    protected $twitter;

    /**
     * Allow only admins to tweet
     *
     * @phergieConfig twitter.tweetrequireadmin
     */
    static $TWEET_REQUIRE_ADMIN = true;

    /**
     * Initialize (set up configuration vars)
     *
     * @return void
     */
    public function onInit()
    {
        // see if tweetrequireadmin defined in config
        if ($req = $this->getIni('twitter.tweetrequireadmin')) {
            // if so, override default
            self::$TWEET_REQUIRE_ADMIN = $req;
        }
        if (!$twitterClass = $this->getIni('twitter.class')) {
            $twitterClass = 'Twitter';
        }
        if ($url = $this->getIni('twitter.url')) {
            $this->twitter = new $twitterClass($this->getIni('twitter.user'), $this->getIni('twitter.password'), $url);
        } else {
            $this->twitter = new $twitterClass($this->getIni('twitter.user'), $this->getIni('twitter.password'));
        }
    }
    
    /**
     * Fetches the associated tweet and relays it to the channel
     *
     * @param string $tweeter if numeric the tweet number/id, otherwise the twitter user name (optionally prefixed with @)
     * @param int $num optional tweet number for this user (number of tweets ago)
     * @return void
     */
    public function onDoTwitter($tweeter = null, $num = 1)
    {
        $user = $this->getIni('twitter.user');
        $source = $this->event->getSource();
        if (is_numeric($tweeter)) {
            $tweet = $this->twitter->getTweetByNum($tweeter);
        } else if (is_null($tweeter) && $user) {
            $tweet = $this->twitter->getLastTweet($user, 1);
        } else {
            $tweet = $this->twitter->getLastTweet(ltrim($tweeter, '@'), $num);
        }
        if ($tweet) {
            $this->doPrivmsg($source, $this->formatTweet($tweet));
        }
    }
    
    /**
     * Sends a tweet to Twitter as the configured user
     *
     * @param string $txt the text to tweet
     * @return void
     */
    public function onDoTweet($txt) {
        $nick = $this->event->getNick();
        if (!$this->getIni('twitter.user')) {
            return;
        }
        if (self::$TWEET_REQUIRE_ADMIN && !$this->fromAdmin(true)) {
            return;
        }
        $source = $this->event->getSource();
        if ($tweet = $this->twitter->sendTweet($txt)) {
            $this->doPrivmsg($source, 'Tweeted: '. $this->twitter->getUrlOutputStatus($tweet));
        } else {
            $this->doNotice($nick, 'Tweet failed');
        }
    }
    
    /**
     * Formats a Tweet into a message suitable for output
     *
     * @param object $tweet
     * @return string
     */
    protected function formatTweet(StdClass $tweet) {
        return '<@' . $tweet->user->screen_name .'> '. $this->twitter->decode($tweet->text)
            . ' - ' . $this->getCountdown(time() - strtotime($tweet->created_at)) . ' ago'
            . ' (' . $this->twitter->getUrlOutputStatus($tweet) . ')';
    }
}