rss-bridge/bridges/YoutubeBridge.php

<?php
/**
* RssBridgeYoutube 
* Returns the newest videos
* 2014-05-25
*
* @name Youtube Bridge
* @homepage https://www.youtube.com/
* @description Returns the newest videos by username or playlist
* @maintainer mitsukarenai
* @use1(u="username")
* @use2(p="playlist id")
* @use3(s="search keyword",pa="page")
* 
* WARNING: to parse big playlists (over ~90 videos), you need to edit simple_html_dom.php: 
* change: define('MAX_FILE_SIZE', 600000);
* into:   define('MAX_FILE_SIZE', 900000);  (or more)
*/
class YoutubeBridge extends BridgeAbstract{
    
    private $request;
    
    public function collectData(array $param){

	function getPublishDate($id) {
		# relies on Youtube API; deprecated
		$json = json_decode(file_get_contents("https://gdata.youtube.com/feeds/api/videos/$id?v=2&alt=json"), TRUE) or return time();
		$timestamp = strtotime($json['entry']['published']['$t']);
		return $timestamp;
	} 


        $html = '';
        if (isset($param['u'])) {   /* user timeline mode */
            $this->request = $param['u'];
            $html = file_get_html('https://www.youtube.com/user/'.urlencode($this->request).'/videos') or $this->returnError('Could not request Youtube.', 404);

	        foreach($html->find('li.channels-content-item') as $element) {
            	 $item = new \Item();
           	 $item->uri = 'https://www.youtube.com'.$element->find('a',0)->href;
           	 $item->thumbnailUri = 'https:'.$element->find('img',0)->src;
           	 $item->title = trim($element->find('h3',0)->plaintext);
		$item->id = str_replace('/watch?v=', '', $element->find('a',0)->href);
		$item->timestamp = getPublishDate($item->id);
           	 $item->content = '<a href="' . $item->uri . '"><img src="' . $item->thumbnailUri . '" /></a><br><a href="' . $item->uri . '">' . $item->title . '</a>';
           	 $this->items[] = $item;
        	}
        }
        else if (isset($param['p'])) {   /* playlist mode */
            $this->request = $param['p'];
            $html = file_get_html('https://www.youtube.com/playlist?list='.urlencode($this->request).'') or $this->returnError('Could not request Youtube.', 404);

        	foreach($html->find('tr.pl-video') as $element) {
           	 $item = new \Item();
           	 $item->uri = 'https://www.youtube.com'.$element->find('.pl-video-title a',0)->href;
            	$item->thumbnailUri = 'https:'.str_replace('/default.','/mqdefault.',$element->find('.pl-video-thumbnail img',0)->src);
            	$item->title = trim($element->find('.pl-video-title a',0)->plaintext);
		$item->id = str_replace('/watch?v=', '', $element->find('a',0)->href);
		$item->timestamp = getPublishDate($item->id);
            	$item->content = '<a href="' . $item->uri . '"><img src="' . $item->thumbnailUri . '" /></a><br><a href="' . $item->uri . '">' . $item->title . '</a>';
            	$this->items[] = $item;
        	}
		$this->request = 'Playlist '.trim(str_replace(' - YouTube', '', $html->find('title', 0)->plaintext)).', by '.$html->find('h1', 0)->plaintext;
        }
        else if (isset($param['s'])) {   /* search mode */
            $this->request = $param['s']; $page = 1; if (isset($param['pa'])) $page = (int)preg_replace("/[^0-9]/",'', $param['pa']); 
            $html = file_get_html('https://www.youtube.com/results?search_query='.urlencode($this->request).'&&page='.$page.'&filters=video&search_sort=video_date_uploaded') or $this->returnError('Could not request Youtube.', 404);

        	foreach($html->find('li.yt-lockup') as $element) {
           	 $item = new \Item();
           	 $item->uri = 'https://www.youtube.com'.$element->find('a',0)->href;
		$checkthumb = $element->find('img', 0)->getAttribute('data-thumb');
		if($checkthumb !== FALSE)
			$item->thumbnailUri = $checkthumb;
		else
            		$item->thumbnailUri = ''.$element->find('img',0)->src;
            	$item->title = trim($element->find('h3',0)->plaintext);
		$item->id = str_replace('/watch?v=', '', $element->find('a',0)->href);
		$item->timestamp = getPublishDate($item->id);
            	$item->content = '<a href="' . $item->uri . '"><img src="' . $item->thumbnailUri . '" /></a><br><a href="' . $item->uri . '">' . $item->title . '</a>';
            	$this->items[] = $item;
        	}
		$this->request = 'Search: '.str_replace(' - YouTube', '', $html->find('title', 0)->plaintext);
        }
        else {
		$this->returnError('You must either specify a Youtube username (?u=...) or a playlist id (?p=...) or search (?s=...)', 400);
	}
   
    }

    public function getName(){
        return (!empty($this->request) ? $this->request .' - ' : '') .'Youtube Bridge';
    }

    public function getURI(){
        return 'https://www.youtube.com/';
    }

    public function getCacheDuration(){
        return 10800; // 3 hours
    }
}