WIP add webcam sensor

UserInterface/Properties/PublishProfiles/Standalone.pubxml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+https://go.microsoft.com/fwlink/?LinkID=208121. 
+-->
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <Configuration>Release</Configuration>
+    <Platform>Any CPU</Platform>
+    <PublishDir>bin\Userinterface-standalone</PublishDir>
+    <PublishProtocol>FileSystem</PublishProtocol>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <RuntimeIdentifier>win-x64</RuntimeIdentifier>
+    <SelfContained>true</SelfContained>
+    <PublishSingleFile>False</PublishSingleFile>
+    <PublishReadyToRun>False</PublishReadyToRun>
+    <PublishTrimmed>False</PublishTrimmed>
+  </PropertyGroup>
+</Project>

UserInterface/Properties/PublishProfiles/Standalone.pubxml.user

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+https://go.microsoft.com/fwlink/?LinkID=208121. 
+-->
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+</Project>

UserInterface/UserInterface.csproj.user

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="Current" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <PropertyGroup>
-    <_LastSelectedProfileId>C:\Users\Maurits\Documents\Repo\hass-desktop-service\UserInterface\Properties\PublishProfiles\FolderProfile.pubxml</_LastSelectedProfileId>
+    <_LastSelectedProfileId>C:\Users\Maurits\Documents\Repo\hass-desktop-service\UserInterface\Properties\PublishProfiles\Standalone.pubxml</_LastSelectedProfileId>
   </PropertyGroup>
 </Project>

UserInterface/Views/AddSensorDialog.axaml.cs

@@ -90,7 +90,7 @@ namespace UserInterface.Views
                     break;
                 case AvailableSensors.MemoryUsageSensor:
                     item.Description = "This sensor calculates the percentage of used memory.";
-                    item.MoreInfoLink = "https://github.com/sleevezipper/hass-workstation-service#usedmemorysensor";
+                    item.MoreInfoLink = "https://github.com/sleevezipper/hass-workstation-service#usedmemory";
                     item.ShowQueryInput = false;
                     item.UpdateInterval = 10;
                     break;
@@ -100,6 +100,12 @@ namespace UserInterface.Views
                     item.ShowQueryInput = false;
                     item.UpdateInterval = 5;
                     break;
+                case AvailableSensors.WebcamActiveSensor:
+                    item.Description = "This sensor shows if the webcam is currently in use.";
+                    item.MoreInfoLink = "https://github.com/sleevezipper/hass-workstation-service#webcamactive";
+                    item.ShowQueryInput = false;
+                    item.UpdateInterval = 10;
+                    break;
                 default:
                     item.Description = null;
                     item.MoreInfoLink = null;

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

@@ -106,6 +106,9 @@ namespace hass_workstation_service.Communication.InterProcesCommunication
                 case AvailableSensors.ActiveWindowSensor:
                     sensorToCreate = new ActiveWindowSensor(this._publisher, (int)model.UpdateInterval, model.Name);
                     break;
+                case AvailableSensors.WebcamActiveSensor:
+                    sensorToCreate = new WebcamActiveSensor(this._publisher, (int)model.UpdateInterval, model.Name);
+                    break;
                 default:
                     Log.Logger.Error("Unknown sensortype");
                     break;

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

@@ -36,6 +36,7 @@ namespace hass_workstation_service.Communication.InterProcesCommunication.Models
         CPULoadSensor,
         WMIQuerySensor,
         MemoryUsageSensor,
-        ActiveWindowSensor
+        ActiveWindowSensor,
+        WebcamActiveSensor
     }
 }

hass-workstation-service/Data/ConfigurationService.cs

@@ -88,6 +88,9 @@ namespace hass_workstation_service.Data
                     case "ActiveWindowSensor":
                         sensor = new ActiveWindowSensor(publisher, configuredSensor.UpdateInterval, configuredSensor.Name, configuredSensor.Id);
                         break;
+                    case "WebcamActiveSensor":
+                        sensor = new WebcamActiveSensor(publisher, configuredSensor.UpdateInterval, configuredSensor.Name, configuredSensor.Id);
+                        break;
                     default:
                         Log.Logger.Error("unsupported sensor type in config");
                         break;

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

@@ -0,0 +1,182 @@
+using hass_workstation_service.Communication;
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Management;
+using System.Runtime.ExceptionServices;
+using System.Runtime.InteropServices;
+using System.Text;
+using System.Threading;
+
+namespace hass_workstation_service.Domain.Sensors
+{
+    public class WebcamActiveSensor : AbstractSensor
+    {
+        public WebcamActiveSensor(MqttPublisher publisher, int? updateInterval = null, string name = "WebcamActive", Guid id = default) : base(publisher, name, updateInterval ?? 10, id)
+        {
+        }
+        public override string GetState()
+        {
+            try
+            {
+                List<Process> procs = WhoIsLocking("\\Device\\00000041");
+                if (procs.Count > 0)
+                {
+                    return "True";
+                }
+                return "False";
+            }
+            catch (Exception)
+            {
+                return "Error";
+            }
+        }
+        public override AutoDiscoveryConfigModel GetAutoDiscoveryConfig()
+        {
+            return this._autoDiscoveryConfigModel ?? SetAutoDiscoveryConfigModel(new AutoDiscoveryConfigModel()
+            {
+                Name = this.Name,
+                Unique_id = this.Id.ToString(),
+                Device = this.Publisher.DeviceConfigModel,
+                State_topic = $"homeassistant/sensor/{this.Name}/state",
+                Icon = "mdi:webcam",
+            });
+        }
+
+        [StructLayout(LayoutKind.Sequential)]
+        struct RM_UNIQUE_PROCESS
+        {
+            public int dwProcessId;
+            public System.Runtime.InteropServices.ComTypes.FILETIME ProcessStartTime;
+        }
+
+        const int RmRebootReasonNone = 0;
+        const int CCH_RM_MAX_APP_NAME = 255;
+        const int CCH_RM_MAX_SVC_NAME = 63;
+
+        enum RM_APP_TYPE
+        {
+            RmUnknownApp = 0,
+            RmMainWindow = 1,
+            RmOtherWindow = 2,
+            RmService = 3,
+            RmExplorer = 4,
+            RmConsole = 5,
+            RmCritical = 1000
+        }
+
+        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
+        struct RM_PROCESS_INFO
+        {
+            public RM_UNIQUE_PROCESS Process;
+
+            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = CCH_RM_MAX_APP_NAME + 1)]
+            public string strAppName;
+
+            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = CCH_RM_MAX_SVC_NAME + 1)]
+            public string strServiceShortName;
+
+            public RM_APP_TYPE ApplicationType;
+            public uint AppStatus;
+            public uint TSSessionId;
+            [MarshalAs(UnmanagedType.Bool)]
+            public bool bRestartable;
+        }
+
+        [DllImport("rstrtmgr.dll", CharSet = CharSet.Unicode)]
+        static extern int RmRegisterResources(uint pSessionHandle,
+                                              UInt32 nFiles,
+                                              string[] rgsFilenames,
+                                              UInt32 nApplications,
+                                              [In] RM_UNIQUE_PROCESS[] rgApplications,
+                                              UInt32 nServices,
+                                              string[] rgsServiceNames);
+
+        [DllImport("rstrtmgr.dll", CharSet = CharSet.Auto)]
+        static extern int RmStartSession(out uint pSessionHandle, int dwSessionFlags, string strSessionKey);
+
+        [DllImport("rstrtmgr.dll")]
+        static extern int RmEndSession(uint pSessionHandle);
+
+        [DllImport("rstrtmgr.dll")]
+        static extern int RmGetList(uint dwSessionHandle,
+                                    out uint pnProcInfoNeeded,
+                                    ref uint pnProcInfo,
+                                    [In, Out] RM_PROCESS_INFO[] rgAffectedApps,
+                                    ref uint lpdwRebootReasons);
+
+        /// <summary>
+        /// Find out what process(es) have a lock on the specified file.
+        /// </summary>
+        /// <param name="path">Path of the file.</param>
+        /// <returns>Processes locking the file</returns>
+        /// <remarks>See also:
+        /// http://msdn.microsoft.com/en-us/library/windows/desktop/aa373661(v=vs.85).aspx
+        /// http://wyupdate.googlecode.com/svn-history/r401/trunk/frmFilesInUse.cs (no copyright in code at time of viewing)
+        /// 
+        /// </remarks>
+        static public List<Process> WhoIsLocking(string path)
+        {
+            uint handle;
+            string key = Guid.NewGuid().ToString();
+            List<Process> processes = new List<Process>();
+
+            int res = RmStartSession(out handle, 0, key);
+            if (res != 0) throw new Exception("Could not begin restart session.  Unable to determine file locker.");
+
+            try
+            {
+                const int ERROR_MORE_DATA = 234;
+                uint pnProcInfoNeeded = 0,
+                     pnProcInfo = 0,
+                     lpdwRebootReasons = RmRebootReasonNone;
+
+                string[] resources = new string[] { path }; // Just checking on one resource.
+
+                res = RmRegisterResources(handle, (uint)resources.Length, resources, 0, null, 0, null);
+
+                if (res != 0) throw new Exception("Could not register resource.");
+
+                //Note: there's a race condition here -- the first call to RmGetList() returns
+                //      the total number of process. However, when we call RmGetList() again to get
+                //      the actual processes this number may have increased.
+                res = RmGetList(handle, out pnProcInfoNeeded, ref pnProcInfo, null, ref lpdwRebootReasons);
+
+                if (res == ERROR_MORE_DATA)
+                {
+                    // Create an array to store the process results
+                    RM_PROCESS_INFO[] processInfo = new RM_PROCESS_INFO[pnProcInfoNeeded];
+                    pnProcInfo = pnProcInfoNeeded;
+
+                    // Get the list
+                    res = RmGetList(handle, out pnProcInfoNeeded, ref pnProcInfo, processInfo, ref lpdwRebootReasons);
+                    if (res == 0)
+                    {
+                        processes = new List<Process>((int)pnProcInfo);
+
+                        // Enumerate all of the results and add them to the 
+                        // list to be returned
+                        for (int i = 0; i < pnProcInfo; i++)
+                        {
+                            try
+                            {
+                                processes.Add(Process.GetProcessById(processInfo[i].Process.dwProcessId));
+                            }
+                            // catch the error -- in case the process is no longer running
+                            catch (ArgumentException) { }
+                        }
+                    }
+                    else throw new Exception("Could not list processes locking resource.");
+                }
+                else if (res != 0) throw new Exception("Could not list processes locking resource. Failed to get size of result.");
+            }
+            finally
+            {
+                RmEndSession(handle);
+            }
+
+            return processes;
+        }
+
+    }
+}

hass-workstation-service/Properties/PublishProfiles/AzureHosted.pubxml

@@ -4,7 +4,7 @@ https://go.microsoft.com/fwlink/?LinkID=208121.
 -->
 <Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <PropertyGroup>
-    <ApplicationRevision>25</ApplicationRevision>
+    <ApplicationRevision>26</ApplicationRevision>
     <ApplicationVersion>1.0.0.*</ApplicationVersion>
     <BootstrapperEnabled>True</BootstrapperEnabled>
     <Configuration>Release</Configuration>

hass-workstation-service/Properties/PublishProfiles/FolderProfile.pubxml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+https://go.microsoft.com/fwlink/?LinkID=208121. 
+-->
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <Configuration>Release</Configuration>
+    <Platform>Any CPU</Platform>
+    <PublishDir>bin\Manual\</PublishDir>
+    <PublishProtocol>FileSystem</PublishProtocol>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <SelfContained>true</SelfContained>
+    <RuntimeIdentifier>win-x64</RuntimeIdentifier>
+    <PublishSingleFile>False</PublishSingleFile>
+    <PublishReadyToRun>False</PublishReadyToRun>
+    <PublishTrimmed>False</PublishTrimmed>
+  </PropertyGroup>
+</Project>

hass-workstation-service/Properties/PublishProfiles/FolderProfile.pubxml.user

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+https://go.microsoft.com/fwlink/?LinkID=208121. 
+-->
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+</Project>

hass-workstation-service/hass-workstation-service.csproj.user

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="Current" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <PropertyGroup>
-    <_LastSelectedProfileId>C:\Users\Maurits\Documents\Repo\hass-desktop-service\hass-workstation-service\Properties\PublishProfiles\AzureHosted.pubxml</_LastSelectedProfileId>
+    <_LastSelectedProfileId>C:\Users\Maurits\Documents\Repo\hass-desktop-service\hass-workstation-service\Properties\PublishProfiles\FolderProfile.pubxml</_LastSelectedProfileId>
     <ShowAllFiles>true</ShowAllFiles>
   </PropertyGroup>
 </Project>