From 19c2bca8a3520266e51fc91ae1e43b973fc3a681 Mon Sep 17 00:00:00 2001
From: logmanoriginal <log.man@gmx.de>
Date: Tue, 14 Jul 2015 13:36:09 +0200
Subject: [PATCH] Add YoutubeApiBridge.php

---
 bridges/YoutubeApiBridge.php | 134 +++++++++++++++++++++++++++++++++++
 1 file changed, 134 insertions(+)
 create mode 100644 bridges/YoutubeApiBridge.php

diff --git a/bridges/YoutubeApiBridge.php b/bridges/YoutubeApiBridge.php
new file mode 100644
index 00000000..dfa6d402
--- /dev/null
+++ b/bridges/YoutubeApiBridge.php
@@ -0,0 +1,134 @@
+<?php
+/**
+* RssBridgeYouTubeApi
+* Returns the newest videos
+*
+* @name YouTube Data API Bridge
+* @homepage https://www.youtube.com/
+* @description Returns the newest videos by channel name or playlist id using the YouTube Data API
+* @maintainer logmanoriginal
+* @update 2015-07-13
+* @use1(k="YouTube Data API key", u="Channel name", i="Number of feed items")
+* @use3(k="YouTube Data API key", p="Playlist id")
+*/
+class YoutubeApiBridge extends BridgeAbstract{
+    
+	private $request;
+    
+	public function collectData(array $param){
+
+		$count = 0; // Number of feed items to return
+		
+		$api = new StdClass(); // Cache for the YouTube Data API
+		
+		// Load the API key
+		if (isset($param['k']) && $param['k'] != "") {
+			$api->key = $param['k'];
+		} else {
+			$this->returnError('You must specify a valid API key (?k=...)', 400);
+		}
+		
+		// Load number of feed items (count)
+		if (isset($param['u']) && isset($param['i']) && is_numeric($param['i'])) {
+			$count = (int)$param['i'];
+		} 
+		else if (isset($param['p'])) { 
+			// not required
+		} else {
+			$this->returnError('You must specify the number of items to return (?i=...)', 400);
+		}
+		
+		// Retrieve information by channel name
+		if (isset($param['u'])) {
+			$this->request = $param['u'];
+			
+			// We have to acquire the channel id first.
+			// For some reason an error from the API results in a false from file_get_contents, so we've to handle that.
+			$api->channels = file_get_contents('https://www.googleapis.com/youtube/v3/channels?part=contentDetails&forUsername=' . urlencode($this->request) . '&key=' . $api->key);
+			if($api->channels == false) { 
+				$this->returnError('Request failed! Check channel name and API key!', 400); 
+			}
+			$channels = json_decode($api->channels);
+			
+			// Calculate number of requests (max. 50 items per request possible)
+			$req_count = (int)($count / 50);
+			
+			if($count % 50 <> 0) {
+				$req_count++;
+			}
+			
+			// Each page is identified by a page token, the first page has none.
+			$pageToken = '';
+			
+			// Go through all pages
+			for($i = 1; $i <= $req_count; $i++){
+				$api->playlistItems = file_get_contents('https://www.googleapis.com/youtube/v3/playlistItems?part=snippet%2CcontentDetails%2Cstatus&maxResults=50&playlistId=' . $channels->items[0]->contentDetails->relatedPlaylists->uploads . '&pageToken=' . $pageToken . '&key=' . $api->key);
+				$playlistItems = json_decode($api->playlistItems);
+				
+				// Get the next token
+				$pageToken = $playlistItems->nextPageToken;
+
+				foreach($playlistItems->items as $element) {
+					$item = new \Item();
+					$item->id = $element->contentDetails->videoId;
+					$item->uri = 'https://www.youtube.com/watch?v='.$item->id;
+					$item->thumbnailUri = $element->snippet->thumbnails->{'default'}->url;
+					$item->title = htmlspecialchars($element->snippet->title);
+					$item->timestamp = strtotime($element->snippet->publishedAt);
+					$item->content = '<a href="' . $item->uri . '"><img src="' . $item->thumbnailUri . '" /></a><br><a href="' . $item->uri . '">' . $item->title . '</a>';
+					$this->items[] = $item;
+					
+					// Stop once the number of requested items is reached
+					if(count($this->items) >= $count) {
+						break;
+					}
+				}
+			}
+		}
+		
+		// Retrieve information by playlist
+		else if (isset($param['p'])) {
+			$this->request = $param['p'];
+			
+			// Reading playlist information is similar to how it works on a channel. We don't need a channel id though.
+			// For a playlist we always return all items. YouTube has a limit of 200 items per playlist, so the maximum is 4 calls to the API.
+			
+			$pageToken = '';
+			
+			do {
+				$api->playlistItems = file_get_contents('https://www.googleapis.com/youtube/v3/playlistItems?part=snippet%2CcontentDetails%2Cstatus&maxResults=50&playlistId=' . $this->request . '&pageToken=' . $pageToken . '&key=' . $api->key);
+				$playlistItems = json_decode($api->playlistItems);
+
+				foreach($playlistItems->items as $element) {
+					$item = new \Item();
+					$item->id = $element->contentDetails->videoId;
+					$item->uri = 'https://www.youtube.com/watch?v='.$item->id;
+					$item->thumbnailUri = $element->snippet->thumbnails->{'default'}->url;
+					$item->title = htmlspecialchars($element->snippet->title);
+					$item->timestamp = strtotime($element->snippet->publishedAt);
+					$item->content = '<a href="' . $item->uri . '"><img src="' . $item->thumbnailUri . '" /></a><br><a href="' . $item->uri . '">' . $item->title . '</a>';
+					$this->items[] = $item;
+				}
+				
+				if (isset($playlistItems->nextPageToken)) {
+					$pageToken = $playlistItems->nextPageToken;
+				} else { 
+					$pageToken = ''; 
+				}
+			} while ($pageToken != '');
+		}
+	}
+
+	public function getName(){
+		return (!empty($this->request) ? $this->request .' - ' : '') . 'YouTube API Bridge';
+	}
+
+	public function getURI(){
+		return 'https://www.youtube.com/';
+	}
+
+	public function getCacheDuration(){
+		return 10800; // 3 hours
+	}
+}
+?>
\ No newline at end of file