Use promises, split tests, make music services modular, add deezer.

lib/services/deezer.js

@@ -0,0 +1,86 @@
+"use strict";
+var parse = require('url').parse;
+var request = require('superagent');
+var Q = require('q');
+
+module.exports.id = "deezer";
+
+var apiRoot = "https://api.deezer.com";
+
+module.exports.match = function(url, type) {
+  var parsed = parse(url);
+  return parsed.host.match(/deezer\.com$/);
+};
+
+module.exports.lookupId = function(id, type) {
+  var deferred = Q.defer();
+  var path = "/" + type + "/" + id;
+
+  request.get(apiRoot + path, function(res) {
+    var result = res.body;
+
+    if (type == "album") {
+      deferred.resolve({
+        service: "deezer",
+        type: type,
+        id: result.id,
+        name: result.title,
+        url: result.link,
+        artwork: result.cover,
+        artist: {
+          name: result.artist.name
+        },
+      });
+    } else if (type == "track") {
+      deferred.resolve({
+        service: "deezer",
+        type: type,
+        id: result.id,
+        name: result.title,
+        url: result.link,
+        artwork: result.album.cover,
+        artist: {
+          name: result.artist.name
+        },
+        album: {
+          name: result.album.title
+        }
+      });
+    };
+  });
+  return deferred.promise;
+};
+
+module.exports.search = function(data, next) {
+  var deferred = Q.defer();
+  var query;
+  var type = data.type;
+
+  if (type == "album") {
+    query = data.artist.name + " " + data.name;
+  } else if (type == "track") {
+    query = data.artist.name + " " + data.album.name + " " + data.name;
+  }
+
+  var path = "/search/" + type + "?q=" + encodeURIComponent(query);
+  request.get(apiRoot + path, function(res) {
+    if (!res.body.data[0]) {
+      deferred.resolve({service: "deezer"});
+    } else {
+      module.exports.lookupId(res.body.data[0].id, type).then(deferred.resolve);
+    }
+  });
+  return deferred.promise;
+};
+
+module.exports.parseUrl = function(url, next) {
+  var deferred = Q.defer();
+  var matches = parse(url).path.match(/\/albums[\/]+([^\/]+)(\/tracks\/)?([^\/]+)?/);
+
+  if (matches && matches[3]) {
+    module.exports.lookupId(matches[3]).then(deferred.resolve);
+  } else if (matches && matches[1]) {
+    module.exports.lookupId(matches[1]).then(deferred.resolve);
+  }
+  return deferred.promise;
+}