<?php 
    /**
     * Get Twitter Updates
     *
     * $twits = $this->Twitter->find(array('cache'=>true,'limit'=>8));
     *
     * @author        Darren Moore, zeeneo@gmail.com
     * @link          http://www.zeen.co.uk
     */
    class Twitter extends AppModel
    {
        /**
         * Your Twitter ID
         *
         * @var integer
         * @access public
         */
        public $twitterId = 14210082;
        
        /**
         * Remove your name from posts
         * Set to false to not remove your name, otherwise set to your name
         *
         * @var mixed
         * @access public
         */
        public $twitterName = 'zeeneo';
        
        /**
         * Show replies to people
         *
         * @var boolean
         * @access public
         */
        public $showReplies = false;
        
        /**
         * Twitter RSS URL
         *
         * @var string
         * @access public
         */
        public $rssUrl = 'http://twitter.com/statuses/user_timeline/:twitterId.rss';
        
        /**
         * Turn off table usage
         *
         * @var string
         * @access public
         */
        public $useTable = false;
        
        /**
         * Duration of cache
         *
         * @var string
         * @access public
         */
        public $cacheDuration = '+30 mins';
    
    
        /**
         * Find Twitters
         *
         * @param array $options Options when getting twits, as followed:
         *                          - cache: Force caching on or off
         *                          - limit: Limit number of records returned
         * @access public
         * @return array
         */
        public function find($options = array())
        {
            //Get twits
            if((isset($options['cache']) && $options['cache'] == false) || ($twits = Cache::read('Twitter.lines')) == false)
            {
                $twits = $this->_getTwits();
                Cache::set(array('duration' => $this->cacheDuration));
                Cache::write('Twitter.lines',$twits);
            }
            
            //Set to limit
            if(isset($options['limit']) && count($twits) > $options['limit'])
            {
                $twits = array_slice($twits, 0, $options['limit']);
            }
            
            return $twits;
        }
        
        /**
         * Get Twitter Lines
         * 
         * @access private
         * @return array
         */
        private function _getTwits()
        {        
            //Get feed
            $ch = curl_init();
            curl_setopt($ch, CURLOPT_URL,String::insert($this->rssUrl,array('twitterId'=>$this->twitterId)));
            curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 2);
            curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
            $feed = curl_exec($ch);
            curl_close($ch);
            
            if(!$feed) { return false; }
            
            $xml = new SimpleXmlElement($feed);
            
            foreach($xml->channel->item as $item)
            {
                //
                $title = (string)$item->title;
            
                //Skip if it's a reply
                if(!$this->showReplies && preg_match('/^'.$this->twitterName.': @/',$title))
                    continue;
            
                //Remove name
                if($this->twitterName)
                    $title = trim(preg_replace('/^'.$this->twitterName.':/','',$title));
            
                $out[] = array(
                    'title' => $title,
                    'description' => (string)$item->description,
                    'pubDate' => strtotime($item->pubDate),
                    'link' => (string)$item->link
                );
            }
            
            return $out;
        }
    
    }

?>