youtube link handle thing [#534]

modules/youtube/config.json

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+{
+    "outputPrefix": "\u000305youtube\u000f"
+}

modules/youtube/strings.json

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+{
+    "yt_video": {
+        "en": "[{title} by {author} — \u000312▶\u000f{plays} (\u00039▲{likes}\u000f|\u000312{dislikes}▼\u000f)]"
+    }
+}

modules/youtube/youtube.js

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+/**
+ * Module Name: youtube
+ * Description: Various Youtube functionality
+ */
+var _ = require('underscore')._,
+    request = require('request');
+
+var youtube = function(dbot) {
+    this.ApiRoot = 'https://gdata.youtube.com/feeds/api';
+    this.params = {
+        'alt': 'json',
+        'v': 2
+    };
+
+    this.onLoad = function() {
+        dbot.api.link.addHandler(this.name,
+            /^.*(youtu.be\/|v\/|u\/\w\/|embed\/|watch\?v=|\&v=)([^#\&\?]*).*/,
+            function(event, match, name) {
+                request.get(this.ApiRoot + '/videos/' + match[2], {
+                    'qs': this.params,
+                    'json': true
+                }, function(error, response, body) {
+                    if(_.isObject(body) && _.has(body, 'entry')) {
+                        var v = body.entry;
+                        event.reply(dbot.t('yt_video', {
+                            'title': v.title['$t'],
+                            'plays': v['yt$statistics'].viewCount,
+                            'author': v.author[0].name['$t'],
+                            'likes': v['yt$rating'].numLikes,
+                            'dislikes': v['yt$rating'].numDislikes
+                        }));
+                    }
+                });
+            }.bind(this));
+    }.bind(this);
+};
+
+exports.fetch = function(dbot) {
+    return new youtube(dbot);
+};