Fixed minor issue with xbox scrobbling

Author: cgravolet

src/js/plugins/xbox.js

@@ -5,17 +5,28 @@ var Plugin = require("../modules/Plugin");
 var Utils  = require("../modules/Utilities");
 var xbox   = Object.create(Plugin).init("xbox", "Xbox Music", /music\.xbox\.com/i);
 
+xbox.test = function () {
+    var domainMatch = this.hostre.test(document.location.hostname);
+    var playerFound = $("#player").length > 0;
+
+    return domainMatch && playerFound;
+};
+
 xbox.scrape = function () {
     var $player         = $("#player");
     var $playerControls = $(".playerControls", $player);
     var $playerDuration = $(".playerDuration", $player);
     var $playerMetadata = $(".playerNowPlayingMetadata:visible", $player);
-    var artist          = $(".secondaryMetadata > a" ,$playerMetadata).attr("title");
-    var title           = $(".primaryMetadata > a" ,$playerMetadata).attr("title");
-    var duration        = $(".playerDurationTextRemaining", $playerDuration).text();
-    var elapsed         = $(".playerDurationTextOnGoing", $playerDuration).text();
+    var artist          = $.trim($(".secondaryMetadata > a" ,$playerMetadata).attr("title"));
+    var title           = $.trim($(".primaryMetadata > a" ,$playerMetadata).attr("title"));
+    var duration        = $.trim($(".playerDurationTextRemaining", $playerDuration).text());
+    var elapsed         = $.trim($(".playerDurationTextOnGoing", $playerDuration).text());
     var stopped         = $(".iconPlayerPlay", $playerControls).length ? true : false;
 
+    if (!artist.length || !title.length || !duration.length) {
+        return {};
+    }
+
     return {
         artist:   artist,
         title:    title,