Add support for Balance, Loudness and Surround

lib/actions/equalizer.js

@@ -20,9 +20,15 @@ function treble(player, values) {
   return player.setTreble(level);
 }
 
+function loudness(player, values) {
+  const enable = values[0] === 'on';
+  return player.setLoudness(enable);
+}
+
 module.exports = function (api) {
   api.registerAction('nightmode', nightMode);
   api.registerAction('speechenhancement', speechEnhancement);
   api.registerAction('bass', bass);
   api.registerAction('treble', treble);
+  api.registerAction('loudness', loudness);
 }

lib/actions/surround.js

@@ -0,0 +1,17 @@
+'use strict';
+
+function surround(player, values) {
+  if (!player.hasSurround) {
+    return Promise.reject(new Error('This zone doesn\'t have Surround'));
+  }
+
+  const action = values[0];
+  const value = values[1];
+
+  return player.setSurround(action, value);
+
+}
+
+module.exports = function (api) {
+  api.registerAction('surround', surround);
+}

lib/actions/volume.js

@@ -1,7 +1,21 @@
 'use strict';
+
 function volume(player, values) {
-  var volume = values[0];
-  return player.setVolume(volume);
+  let channel;
+  let volume;
+  if (/^\d+$/i.test(values[0])) {
+    channel = 'Master';
+    volume = values[0];
+  } else {
+    channel = values[0];
+    volume = values[1];
+  }
+  return player.setVolume(volume, channel);
+}
+
+function balance(player, values) {
+  let level = values[0];
+  return player.setBalance(level);
 }
 
 function groupVolume(player, values) {
@@ -10,5 +24,6 @@ function groupVolume(player, values) {
 
 module.exports = function (api) {
   api.registerAction('volume', volume);
+  api.registerAction('balance', balance);
   api.registerAction('groupvolume', groupVolume);
-}
+}