Initial Xbox Music support

lib/services/xbox/index.js

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+"use strict";
+var parse = require('url').parse;
+var Promise = require('bluebird');
+var request = require('superagent');
+require('superagent-bluebird-promise');
+
+module.exports.id = "xbox";
+
+if (!process.env.XBOX_CLIENT_ID || !process.env.XBOX_CLIENT_SECRET) {
+  console.warn("XBOX_CLIENT_ID and XBOX_CLIENT_SECRET environment variables not found, deactivating Xbox Music.");
+  return;
+}
+
+var credentials = {
+  clientId: process.env.XBOX_CLIENT_ID,
+  clientSecret: process.env.XBOX_CLIENT_SECRET
+};
+
+var apiRoot = "https://music.xboxlive.com/1/content";
+
+var getAccessToken = function() {
+  var authUrl = "https://datamarket.accesscontrol.windows.net/v2/OAuth2-13";
+  var scope = "http://music.xboxlive.com";
+  var grantType = "client_credentials";
+  
+  var data = {client_id: credentials.clientId, client_secret: credentials.clientSecret, scope: scope, grant_type: grantType};
+  return request.post(authUrl).send(data).set('Content-type', 'application/x-www-form-urlencoded').promise().then(function(res) {
+    return res.body.access_token;
+  });
+}
+
+var formatResponse = function(res) {
+  if (res.body.Tracks) {
+    var result = res.body.Tracks.Items[0];
+  } else {
+    var result = res.body.Albums.Items[0];
+  }
+  var item = {
+    service: "xbox",
+    type: res.body.Tracks ? "track" : "album",
+    id: result.Id,
+    name: result.Name,
+    streamUrl: result.Link,
+    purchaseUrl: null,
+    artwork: {
+      small: result.ImageUrl + "?w=250",
+      large: result.ImageUrl + "?w=500"
+    },
+    artist: {
+      name: result.Artists[0].Artist.Name
+    }
+  };
+  if (result.Album) {
+    item.album = {name: result.Album.Name}
+  }
+  return item;
+}
+
+module.exports.match = require('./url').match;
+
+module.exports.parseUrl = function(url) {
+  var parsed = parse(url);
+  var parts = parsed.path.split("/");
+  var type = parts[1];
+  var id = parts[4];
+
+  return module.exports.lookupId("music." + id, type);
+}
+
+module.exports.lookupId = function(id, type) {
+  return getAccessToken().then(function(access_token){
+    var path = "/" + id + "/lookup";
+    return request.get(apiRoot + path).set("Authorization", "Bearer " + access_token).promise().then(function(res) {
+      return formatResponse(res);
+    });
+  });
+};
+
+module.exports.search = function(data) {
+  var query, album;
+  var type = data.type;
+
+  if (type == "album") {
+    query = data.artist.name + " " + data.name;
+    album = data.name;
+  } else if (type == "track") {
+    query = data.artist.name + " " + data.name;
+    album = data.album.name
+  }
+
+  return getAccessToken().then(function(access_token){
+    var path = "/music/search?q=" + encodeURIComponent(query) + "&filters=" + type + "s";
+    return request.get(apiRoot + path).set("Authorization", "Bearer " + access_token).promise().then(function(res) {
+      return formatResponse(res);
+    });
+  });
+};

lib/services/xbox/url.js

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+"use strict";
+var parse = require('url').parse;
+
+module.exports.match = function(url, type) {
+  var parsed = parse(url);
+
+  if (!parsed.host.match(/music.xbox.com$/)) {
+    return false;
+  }
+
+  var parts = parsed.path.split("/");
+
+  return (parts[1] == "album" || parts[1] == "track") && parts[4];
+};