zotero/translators/YouTube.js

{
	"translatorID":"d3b1d34c-f8a1-43bb-9dd6-27aa6403b217",
	"translatorType":4,
	"label":"YouTube",
	"creator":"Sean Takats and Michael Berkowitz and Matt Burton",
	"target":"https?://[^/]*youtube\\.com\\/",
	"minVersion":"1.0.0rc4",
	"maxVersion":"",
	"priority":100,
	"inRepository":true,
	"lastUpdated":"2009-08-08 09:40:00"
}

function detectWeb(doc, url){
	var namespace = doc.documentElement.namespaceURI;
	var nsResolver = namespace ? function(prefix) {
			if (prefix == 'x') return namespace; else return null;
		} : null;
	
	
	var xpath = '//input[@type="hidden" and @name="video_id"]';
	if(doc.evaluate(xpath, doc, nsResolver, XPathResult.ANY_TYPE, null).iterateNext()) {
		return "videoRecording";
	}
	//Search results
	if (doc.evaluate('//div[@class="video-long-title"]/a[contains(@href, "/watch?v=")]', doc, nsResolver, XPathResult.ANY_TYPE, null).iterateNext()){
		return "multiple";
	}
	//playlists
	if (doc.evaluate('//div[starts-with(@class, "title")]/a[contains(@href, "/watch?v=")]', doc, nsResolver, XPathResult.ANY_TYPE, null).iterateNext()){	
		return "multiple";
	}
	// still used?
	if (doc.evaluate('//div[@class="vltitle"]/div[@class="vlshortTitle"]/a[contains(@href, "/watch?v=")]', doc, nsResolver, XPathResult.ANY_TYPE, null).iterateNext()){	
		return "multiple";
	}
	
}

function doWeb(doc, url){
	var namespace = doc.documentElement.namespaceURI;
	var nsResolver = namespace ? function(prefix) {
			if (prefix == 'x') return namespace; else return null;
		} : null;
	var host = doc.location.host;
	var video_ids = new Array();
	var xpath = '//input[@type="hidden" and @name="video_id"]';
	var elmts;
	var elmt;
	elmts = doc.evaluate(xpath, doc, nsResolver, XPathResult.ANY_TYPE, null);
	elmt = elmts.iterateNext();
	if(elmt) {
		//single video
		var video_id = elmt.value;
		video_ids.push(video_id);
	} else {
		// multiple videos
		var items = new Object();
		var videoRe = /\/watch\?v=([a-zA-Z0-9-_]+)/;
// search results and community/user pages
		if (elmt = doc.evaluate('//div[@class="video-long-title"]/a[contains(@href, "/watch?v=")]', doc, nsResolver, XPathResult.ANY_TYPE, null).iterateNext()){
			elmts = doc.evaluate('//div[@class="video-long-title"]/a[contains(@href, "/watch?v=")]', doc, nsResolver, XPathResult.ANY_TYPE, null);
		} 
		// playlists
		else if (doc.evaluate('//div[starts-with(@class, "title")]/a[contains(@href, "/watch?v=")]', doc, nsResolver, XPathResult.ANY_TYPE, null).iterateNext()){
			elmts = doc.evaluate('//div[starts-with(@class, "title")]/a[contains(@href, "/watch?v=")]', doc, nsResolver, XPathResult.ANY_TYPE, null);
		} 
		// still used?
		else if (doc.evaluate('//div[@class="vltitle"]/div[@class="vlshortTitle"]/a[contains(@href, "/watch?v=")]', doc, nsResolver, XPathResult.ANY_TYPE, null).iterateNext()){
			elmts = doc.evaluate('//div[@class="vltitle"]/div[@class="vlshortTitle"]/a[contains(@href, "/watch?v=")]', doc, nsResolver, XPathResult.ANY_TYPE, null);
		}
		while (elmt = elmts.iterateNext()){
			var title = elmt.textContent;
			title = Zotero.Utilities.trimInternal(title);
			var link = elmt.href;
			var m = videoRe(link);
			var video_id = m[1];
			items[video_id] = title;
		}
		items = Zotero.selectItems(items);
		if(!items) return true;
		for(var i in items) {
			video_ids.push(i);
		}
	}
	getData(video_ids, host);			
}

function getData(ids, host){
	var uris = new Array();	
	var url = "http://gdata.youtube.com/feeds/videos/";
	for each(var id in ids){
		uris.push(url+id);
	}
	Zotero.Utilities.HTTP.doGet(uris, function(text) {
		// Strip XML header
		text = text.replace(/<\?xml[^>]*\?>/, "");
		
		default xml namespace = "http://www.w3.org/2005/Atom"; with({});
		var mediaNS = new Namespace("http://search.yahoo.com/mrss/");
		var ytNS = new Namespace("http://gdata.youtube.com/schemas/2007");
		
		// pad xml
		text = "<zotero>"+text+"</zotero>";
		var xml = new XML(text);
		var newItem = new Zotero.Item("videoRecording");
		var title = "";
		var title = xml..mediaNS::title[0].text().toString();
		if (xml..mediaNS::title.length()){
			var title = Zotero.Utilities.trimInternal(xml..mediaNS::title[0].text().toString());
			if (title == ""){
				title = " ";
			}
			newItem.title = title;
		}
		if (xml..mediaNS::keywords.length()){
			var keywords = xml..mediaNS::keywords[0].text().toString();
			keywords = keywords.split(",");
			for each(var tag in keywords){
				newItem.tags.push(Zotero.Utilities.trimInternal(tag));
			}
		}
		if (xml..published.length()){
			var date = xml..published[0].text().toString();
			newItem.date = date.substr(0, 10);
		}
		if (xml..author.name.length()){
			var author = xml..author.name[0].text().toString();
			var creator = Zotero.Utilities.cleanAuthor(author, "contributor", true);
			if (!creator.firstName) {
				creator.fieldMode = 1;
			}
			newItem.creators.push(creator);
		}
		if (xml..mediaNS::player.length()){
			var url = xml..mediaNS::player[0].@url.toString();
			newItem.url = url;
		}
		if (xml..ytNS::duration.length()){
			var runningTime = xml..ytNS::duration[0].@seconds.toString();
			newItem.runningTime = runningTime + " seconds";
		}
		if (xml..mediaNS::description.length()){
			newItem.abstractNote = xml..mediaNS::description[0].text().toString();
		}
		/*
//temporary fix for downloads using techcrunch
		var techcrunchurl = "http://www.techcrunch.com/ytdownload3.php?url="+encodeURIComponent(newItem.url)+"&submit=Get+Video";
		Zotero.debug(techcrunchurl);
		Zotero.Utilities.HTTP.doGet(techcrunchurl, function(text) {
			var flv = text.match(/HREF='([^']+)'/);
			if (flv[1]){
				flv = flv[1];
				// title parameter needs to be encoded
				var title = flv.match(/&title=([^&]+)/);
				if (title[1]){
					title = encodeURIComponent(title[1]);
					flv = flv.replace(/&title=([^&]+)/, title);
				}
				newItem.attachments.push({url:flv, title:"YouTube Video Recording", mimeType:"video/x-flv"});
			}
			newItem.complete();
		}, function() {Zotero.done();});
		*/
		newItem.complete();
		Zotero.done();
	});
	Zotero.wait();
}