feat: move MC into Essentials

In order to solve some dependency issues that keep cropping up, MC
should be moved back into the Essentials repo and loaded automatically
on startup. This will allow for all plugins that use the MC Messengers
library to use the same version without fear of overwriting a dll due to
loading of plugin libraries.

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

@@ -0,0 +1,120 @@
+using Newtonsoft.Json.Linq;
+using PepperDash.Essentials.Core.DeviceTypeInterfaces;
+using PepperDash.Essentials.Devices.Common.AudioCodec;
+using PepperDash.Essentials.Devices.Common.Codec;
+using System;
+using System.Linq;
+
+namespace PepperDash.Essentials.AppServer.Messengers
+{
+    /// <summary>
+    /// Provides a messaging bridge for an AudioCodecBase device
+    /// </summary>
+    public class AudioCodecBaseMessenger : MessengerBase
+    {
+        /// <summary>
+        /// Device being bridged
+        /// </summary>
+        public AudioCodecBase Codec { get; private set; }
+
+        /// <summary>
+        /// Constuctor
+        /// </summary>
+        /// <param name="key"></param>
+        /// <param name="codec"></param>
+        /// <param name="messagePath"></param>
+        public AudioCodecBaseMessenger(string key, AudioCodecBase codec, string messagePath)
+            : base(key, messagePath, codec)
+        {
+            Codec = codec ?? throw new ArgumentNullException("codec");
+            codec.CallStatusChange += Codec_CallStatusChange;
+        }
+
+#if SERIES4
+        protected override void RegisterActions()
+#else
+        protected override void CustomRegisterWithAppServer(MobileControlSystemController appServerController)
+#endif
+        {
+            base.RegisterActions();
+
+            AddAction("/fullStatus", (id, content) => SendAtcFullMessageObject());
+            AddAction("/dial", (id, content) =>
+            {
+                var msg = content.ToObject<MobileControlSimpleContent<string>>();
+
+                Codec.Dial(msg.Value);
+            });
+
+            AddAction("/endCallById", (id, content) =>
+            {
+                var msg = content.ToObject<MobileControlSimpleContent<string>>();
+
+                var call = GetCallWithId(msg.Value);
+                if (call != null)
+                    Codec.EndCall(call);
+            });
+
+            AddAction("/endAllCalls", (id, content) => Codec.EndAllCalls());
+            AddAction("/dtmf", (id, content) =>
+            {
+                var msg = content.ToObject<MobileControlSimpleContent<string>>();
+
+                Codec.SendDtmf(msg.Value);
+            });
+
+            AddAction("/rejectById", (id, content) =>
+            {
+                var msg = content.ToObject<MobileControlSimpleContent<string>>();
+
+                var call = GetCallWithId(msg.Value);
+
+                if (call != null)
+                    Codec.RejectCall(call);
+            });
+
+            AddAction("/acceptById", (id, content) =>
+            {
+                var msg = content.ToObject<MobileControlSimpleContent<string>>();
+                var call = GetCallWithId(msg.Value);
+                if (call != null)
+                    Codec.AcceptCall(call);
+            });
+        }
+
+        /// <summary>
+        /// Helper to grab a call with string ID
+        /// </summary>
+        /// <param name="id"></param>
+        /// <returns></returns>
+        private CodecActiveCallItem GetCallWithId(string id)
+        {
+            return Codec.ActiveCalls.FirstOrDefault(c => c.Id == id);
+        }
+
+        private void Codec_CallStatusChange(object sender, CodecCallStatusItemChangeEventArgs e)
+        {
+            SendAtcFullMessageObject();
+        }
+
+        /// <summary>
+        /// Helper method to build call status for vtc
+        /// </summary>
+        /// <returns></returns>
+        private void SendAtcFullMessageObject()
+        {
+            var info = Codec.CodecInfo;
+
+            PostStatusMessage(JToken.FromObject(new
+                {
+                    isInCall = Codec.IsInCall,
+                    calls = Codec.ActiveCalls,
+                    info = new
+                    {
+                        phoneNumber = info.PhoneNumber
+                    }
+                })
+            );
+        }
+    }
+}