fix: Support for group controls

lib/sonos.js

@@ -286,6 +286,27 @@ Sonos.prototype.getMuted = async function () {
   return this.renderingControlService().GetMute()
 }
 
+/**
+ * Get Current Group Volume
+ * @returns {Number} The current volume
+ */
+Sonos.prototype.getGroupVolume = async function () {
+  debug('Sonos.getGroupVolume()')
+  if (this._isSubscribed && this._volume) return this._volume
+  return this.groupRenderingControlService().GetGroupVolume()
+}
+
+/**
+ * Get Current Group Muted
+ * @returns {Boolean}
+ */
+Sonos.prototype.getGroupMuted = async function () {
+  debug('Sonos.getGroupMuted()')
+  if (this._isSubscribed && this._mute) return this._mute
+  return this.groupRenderingControlService().GetGroupMute()
+}
+
+
 /**
  * Resumes Queue or Plays Provided URI
  * @param  {String|Object}   options      Optional - URI to a Audio Stream or Object with play options
@@ -682,6 +703,27 @@ Sonos.prototype.adjustVolume = async function (volumeAdjustment, channel = 'Mast
   return this.renderingControlService().SetRelativeVolume(volumeAdjustment, channel)
 }
 
+/**
+ * Set Group Volume
+ * @param  {number}   volume 0..100
+ * @param  {string}   channel What channel to change, `Master` is default.
+ * @returns {Object}
+ */
+Sonos.prototype.setGroupVolume = async function (volume, channel = 'Master') {
+  debug('Sonos.setGroupVolume(%j)', volume)
+  return this.groupRenderingControlService().SetGroupVolume(volume, channel)
+}
+
+/**
+ * Adjust Group volume
+ * @param  {number} volumeAdjustment The relative volume adjustment
+ * @param  {string} channel The channel you want to set, `Master` is default.
+ */
+Sonos.prototype.adjustGroupVolume = async function (volumeAdjustment, channel = 'Master') {
+  debug('Sonos.adjustGroupVolume(%j)', volumeAdjustment)
+  return this.groupRenderingControlService().SetRelativeGroupVolume(volumeAdjustment, channel)
+}
+
 /**
  * Configure Sleep Timer
  * @param  {String} sleepTimerDuration
@@ -704,6 +746,18 @@ Sonos.prototype.setMuted = async function (muted, channel = 'Master') {
   return this.renderingControlService().SetMute(muted, channel)
 }
 
+/**
+ * Set Group Muted
+ * @param  {Boolean}  muted
+ * @param  {string}   channel What channel to change, `Master` is default.
+ * @returns {Object}
+ */
+Sonos.prototype.setGroupMuted = async function (muted, channel = 'Master') {
+  debug('Sonos.setGroupMuted(%j)', muted)
+  if (typeof muted === 'string') muted = !!parseInt(muted, 10)
+  return this.groupRenderingControlService().SetGroupMute(muted, channel)
+}
+
 /**
  * Get device balance as number from -100 (full left) to +100 (full right), where 0 is left and right equal
  * @returns {Promise}
@@ -1003,6 +1057,10 @@ Sonos.prototype.renderingControlService = function () {
   return new Services.RenderingControl(this.host, this.port)
 }
 
+Sonos.prototype.groupRenderingControlService = function () {
+  return new Services.GroupRenderingControl(this.host, this.port)
+}
+
 Sonos.prototype.zoneGroupTopologyService = function () {
   return new Services.ZoneGroupTopology(this.host, this.port)
 }