feat: add mobile control messengers for participant audio and video mute functionality

src/PepperDash.Essentials.Devices.Common/VideoCodec/Interfaces/Participant.cs

@@ -1,3 +1,4 @@
+using Newtonsoft.Json;
 namespace PepperDash.Essentials.Devices.Common.VideoCodec.Interfaces
 {
   /// <summary>
@@ -8,61 +9,73 @@ namespace PepperDash.Essentials.Devices.Common.VideoCodec.Interfaces
     /// <summary>
     /// Gets or sets the UserId
     /// </summary>
+    [JsonProperty("userId")]
     public int UserId { get; set; }
 
     /// <summary>
     /// Gets or sets the IsHost
     /// </summary>
+    [JsonProperty("isHost")]
     public bool IsHost { get; set; }
 
     /// <summary>
     /// Gets or sets the IsCohost
     /// </summary>
+    [JsonProperty("isCohost")]
     public bool IsCohost { get; set; }
 
     /// <summary>
     /// Gets or sets the IsMyself
     /// </summary>
+    [JsonProperty("isMyself")]
     public bool IsMyself { get; set; }
 
     /// <summary>
     /// Gets or sets the Name
     /// </summary>
+    [JsonProperty("name")]
     public string Name { get; set; }
 
     /// <summary>
     /// Gets or sets the Email
     /// </summary>
+    [JsonProperty("email")]
     public bool CanMuteVideo { get; set; }
 
     /// <summary>
     /// Gets or sets the CanUnmuteVideo
     /// </summary>
+    [JsonProperty("canUnmuteVideo")]
     public bool CanUnmuteVideo { get; set; }
 
     /// <summary>
     /// Gets or sets the CanMuteAudio
     /// </summary>
-    public bool VideoMuteFb { get; set; }
+    [JsonProperty("canMuteAudio")]
+    public bool CanMuteAudio { get; set; }
 
     /// <summary>
     /// Gets or sets the AudioMuteFb
     /// </summary>
+    [JsonProperty("audioMuteFb")]
     public bool AudioMuteFb { get; set; }
 
     /// <summary>
     /// Gets or sets the HandIsRaisedFb
     /// </summary>
+    [JsonProperty("handIsRaisedFb")]
     public bool HandIsRaisedFb { get; set; }
 
     /// <summary>
     /// Gets or sets the IsPinnedFb
     /// </summary>
+    [JsonProperty("isPinnedFb")]
     public bool IsPinnedFb { get; set; }
 
     /// <summary>
     /// Gets or sets the ScreenIndexIsPinnedToFb
     /// </summary>
+    [JsonProperty("screenIndexIsPinnedToFb")]
     public int ScreenIndexIsPinnedToFb { get; set; }
 
     /// <summary>

src/PepperDash.Essentials.MobileControl.Messengers/Messengers/IHasParticipantAudioMuteMessenger.cs

@@ -0,0 +1,40 @@
+using System;
+using Newtonsoft.Json.Linq;
+using PepperDash.Essentials.AppServer;
+using PepperDash.Essentials.Core;
+using PepperDash.Essentials.Devices.Common.VideoCodec.Interfaces;
+
+namespace PepperDash.Essentials.AppServer.Messengers
+{
+    /// <summary>
+    /// Mobile Control messenger for <see cref="IHasParticipantAudioMute"/>:
+    /// mute-all and per-participant audio/video mute toggles. Action-only (no status of its own).
+    /// </summary>
+    public class IHasParticipantAudioMuteMessenger : MessengerBase
+    {
+        private readonly IHasParticipantAudioMute _codec;
+
+        public IHasParticipantAudioMuteMessenger(string key, string messagePath, EssentialsDevice device)
+            : base(key, messagePath, device)
+        {
+            _codec = device as IHasParticipantAudioMute ?? throw new ArgumentNullException(nameof(device));
+        }
+
+        protected override void RegisterActions()
+        {
+            base.RegisterActions();
+
+            AddAction("/muteAllParticipants", (id, content) => _codec.MuteAudioForAllParticipants());
+            AddAction("/toggleParticipantAudioMute", (id, content) =>
+            {
+                var i = content?.ToObject<MobileControlSimpleContent<int>>();
+                if (i != null) _codec.ToggleAudioForParticipant(i.Value);
+            });
+            AddAction("/toggleParticipantVideoMute", (id, content) =>
+            {
+                var i = content?.ToObject<MobileControlSimpleContent<int>>();
+                if (i != null) _codec.ToggleVideoForParticipant(i.Value);
+            });
+        }
+    }
+}

src/PepperDash.Essentials.MobileControl.Messengers/Messengers/IHasParticipantVideoMuteMessenger.cs

@@ -0,0 +1,44 @@
+using System;
+using Newtonsoft.Json.Linq;
+using PepperDash.Essentials.AppServer;
+using PepperDash.Essentials.Core;
+using PepperDash.Essentials.Devices.Common.VideoCodec.Interfaces;
+
+namespace PepperDash.Essentials.AppServer.Messengers
+{
+    /// <summary>
+    /// Mobile Control messenger for <see cref="IHasParticipantVideoMute"/>:
+    /// per-participant video mute/unmute/toggle. Action-only (no status of its own).
+    /// </summary>
+    public class IHasParticipantVideoMuteMessenger : MessengerBase
+    {
+        private readonly IHasParticipantVideoMute _codec;
+
+        public IHasParticipantVideoMuteMessenger(string key, string messagePath, EssentialsDevice device)
+            : base(key, messagePath, device)
+        {
+            _codec = device as IHasParticipantVideoMute ?? throw new ArgumentNullException(nameof(device));
+        }
+
+        protected override void RegisterActions()
+        {
+            base.RegisterActions();
+
+            AddAction("/muteVideoForParticipant", (id, content) =>
+            {
+                var i = content?.ToObject<MobileControlSimpleContent<int>>();
+                if (i != null) _codec.MuteVideoForParticipant(i.Value);
+            });
+            AddAction("/unmuteVideoForParticipant", (id, content) =>
+            {
+                var i = content?.ToObject<MobileControlSimpleContent<int>>();
+                if (i != null) _codec.UnmuteVideoForParticipant(i.Value);
+            });
+            AddAction("/toggleParticipantVideoMute", (id, content) =>
+            {
+                var i = content?.ToObject<MobileControlSimpleContent<int>>();
+                if (i != null) _codec.ToggleVideoForParticipant(i.Value);
+            });
+        }
+    }
+}

src/PepperDash.Essentials.MobileControl/MessengerFactoryRegistry.cs

@@ -236,6 +236,17 @@ namespace PepperDash.Essentials
                     (d, mp, ck) => new IHasFarEndContentStatusMessenger(
                         $"{d.Key}-farEndContent-{ck}", mp, d)
                 ),
+                new MessengerFactoryEntry(
+                    typeof(IHasParticipantAudioMute),
+                    (d, mp, ck) => new IHasParticipantAudioMuteMessenger(
+                        $"{d.Key}-participantAudioMute-{ck}", mp, d)
+                ),
+                new MessengerFactoryEntry(
+                    typeof(IHasParticipantVideoMute),
+                    (d, mp, ck) => new IHasParticipantVideoMuteMessenger(
+                        $"{d.Key}-participantVideoMute-{ck}", mp, d),
+                    predicate: d => d is IHasParticipantVideoMute && !(d is IHasParticipantAudioMute)
+                ),
                 new MessengerFactoryEntry(
                     typeof(IHasMeetingInfo),
                     (d, mp, ck) => new IHasMeetingInfoMessenger(