add volume sensor

UserInterface/Views/AddSensorDialog.axaml.cs

@@ -156,6 +156,13 @@ namespace UserInterface.Views
                     item.ShowWindowNameInput = false;
                     item.UpdateInterval = 5;
                     break;
+                case AvailableSensors.CurrentVolumeSensor:
+                    item.Description = "This sensor returns the volume of currently playing audio.";
+                    item.MoreInfoLink = "https://github.com/sleevezipper/hass-workstation-service#currentvolume";
+                    item.ShowQueryInput = false;
+                    item.ShowWindowNameInput = false;
+                    item.UpdateInterval = 5;
+                    break;
                 default:
                     item.Description = null;
                     item.MoreInfoLink = null;

hass-workstation-service/Communication/InterProcesCommunication/InterProcessApi.cs

@@ -147,6 +147,9 @@ namespace hass_workstation_service.Communication.InterProcesCommunication
                 case AvailableSensors.SessionStateSensor:
                     sensorToCreate = new SessionStateSensor(this._publisher, (int)model.UpdateInterval, model.Name);
                     break;
+                case AvailableSensors.CurrentVolumeSensor:
+                    sensorToCreate = new CurrentVolumeSensor(this._publisher, (int)model.UpdateInterval, model.Name);
+                    break;
                 default:
                     Log.Logger.Error("Unknown sensortype");
                     break;

hass-workstation-service/Communication/InterProcesCommunication/ServiceContractModels.cs

@@ -50,7 +50,8 @@ namespace hass_workstation_service.Communication.InterProcesCommunication.Models
         NamedWindowSensor,
         LastActiveSensor,
         LastBootSensor,
-        SessionStateSensor
+        SessionStateSensor,
+        CurrentVolumeSensor
     }
 
     public enum AvailableCommands

hass-workstation-service/Data/ConfigurationService.cs

@@ -120,6 +120,9 @@ namespace hass_workstation_service.Data
                     case "SessionStateSensor":
                         sensor = new SessionStateSensor(publisher, configuredSensor.UpdateInterval, configuredSensor.Name, configuredSensor.Id);
                         break;
+                    case "CurrentVolumeSensor":
+                        sensor = new CurrentVolumeSensor(publisher, configuredSensor.UpdateInterval, configuredSensor.Name, configuredSensor.Id);
+                        break;
                     // keep this one last!
                     case "WMIQuerySensor":
                         sensor = new WMIQuerySensor(publisher, configuredSensor.Query, configuredSensor.UpdateInterval, configuredSensor.Name, configuredSensor.Id);

hass-workstation-service/Domain/Sensors/CurrentVolumeSensor.cs

@@ -0,0 +1,53 @@
+using CoreAudio;
+using hass_workstation_service.Communication;
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Linq;
+using System.Runtime.InteropServices;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace hass_workstation_service.Domain.Sensors
+{
+    public class CurrentVolumeSensor : AbstractSensor
+    {
+
+        public CurrentVolumeSensor(MqttPublisher publisher, int? updateInterval = null, string name = "CurrentVolume", Guid id = default(Guid)) : base(publisher, name ?? "CurrentVolume", updateInterval ?? 10, id) { }
+        public override SensorDiscoveryConfigModel GetAutoDiscoveryConfig()
+        {
+            return this._autoDiscoveryConfigModel ?? SetAutoDiscoveryConfigModel(new SensorDiscoveryConfigModel()
+            {
+                Name = this.Name,
+                Unique_id = this.Id.ToString(),
+                Device = this.Publisher.DeviceConfigModel,
+                State_topic = $"homeassistant/{this.Domain}/{Publisher.DeviceConfigModel.Name}/{this.Name}/state",
+                Icon = "mdi:volume-medium",
+                Unit_of_measurement = "%",
+                Availability_topic = $"homeassistant/{this.Domain}/{Publisher.DeviceConfigModel.Name}/availability"
+            });
+        }
+
+        [DllImport("winmm.dll")]
+        public static extern int waveOutGetVolume(IntPtr hwo, out uint dwVolume);
+
+        public override string GetState()
+        {
+            MMDeviceEnumerator DevEnum = new MMDeviceEnumerator();
+
+            var collection = DevEnum.EnumerateAudioEndPoints(EDataFlow.eRender, DEVICE_STATE.DEVICE_STATE_ACTIVE);
+
+            List<float> peaks = new List<float>();
+
+
+            foreach (MMDevice device in collection)
+            {
+                peaks.Add(device.AudioMeterInformation.PeakValues[0]);
+            }
+
+            return Math.Round(peaks.Max() * 100, 0).ToString(CultureInfo.InvariantCulture);
+        }
+
+
+    }
+}