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/IHasScheduleAwarenessMessenger.cs

@@ -0,0 +1,86 @@
+using Newtonsoft.Json;
+using Newtonsoft.Json.Linq;
+using PepperDash.Core;
+using PepperDash.Essentials.Core.DeviceTypeInterfaces;
+using PepperDash.Essentials.Devices.Common.Codec;
+using System;
+using System.Collections.Generic;
+
+namespace PepperDash.Essentials.AppServer.Messengers
+{
+    public class IHasScheduleAwarenessMessenger : MessengerBase
+    {
+        public IHasScheduleAwareness ScheduleSource { get; private set; }
+
+        public IHasScheduleAwarenessMessenger(string key, IHasScheduleAwareness scheduleSource, string messagePath)
+            : base(key, messagePath, scheduleSource as Device)
+        {
+            ScheduleSource = scheduleSource ?? throw new ArgumentNullException("scheduleSource");
+            ScheduleSource.CodecSchedule.MeetingsListHasChanged += new EventHandler<EventArgs>(CodecSchedule_MeetingsListHasChanged);
+            ScheduleSource.CodecSchedule.MeetingEventChange += new EventHandler<MeetingEventArgs>(CodecSchedule_MeetingEventChange);
+        }
+
+#if SERIES4
+        protected override void RegisterActions()
+#else
+        protected override void CustomRegisterWithAppServer(MobileControlSystemController appServerController)
+#endif
+        {
+            AddAction("/schedule/fullStatus", (id, content) => SendFullScheduleObject());
+        }
+
+        private void CodecSchedule_MeetingEventChange(object sender, MeetingEventArgs e)
+        {
+            PostStatusMessage(JToken.FromObject(new MeetingChangeMessage
+                {
+                    MeetingChange = new MeetingChange
+                    {
+                        ChangeType = e.ChangeType.ToString(),
+                        Meeting = e.Meeting
+                    }
+                })
+            );
+        }
+
+        private void CodecSchedule_MeetingsListHasChanged(object sender, EventArgs e)
+        {
+            SendFullScheduleObject();
+        }
+
+        /// <summary>
+        /// Helper method to send the full schedule data
+        /// </summary>
+        private void SendFullScheduleObject()
+        {
+            PostStatusMessage(new FullScheduleMessage
+            {
+                Meetings = ScheduleSource.CodecSchedule.Meetings,
+                MeetingWarningMinutes = ScheduleSource.CodecSchedule.MeetingWarningMinutes
+            });
+        }
+    }
+
+    public class FullScheduleMessage : DeviceStateMessageBase
+    {
+        [JsonProperty("meetings", NullValueHandling = NullValueHandling.Ignore)]
+        public List<Meeting> Meetings { get; set; }
+
+        [JsonProperty("meetingWarningMinutes", NullValueHandling = NullValueHandling.Ignore)]
+        public int MeetingWarningMinutes { get; set; }
+    }
+
+    public class MeetingChangeMessage
+    {
+        [JsonProperty("meetingChange", NullValueHandling = NullValueHandling.Ignore)]
+        public MeetingChange MeetingChange { get; set; }
+    }
+
+    public class MeetingChange
+    {
+        [JsonProperty("changeType", NullValueHandling = NullValueHandling.Ignore)]
+        public string ChangeType { get; set; }
+
+        [JsonProperty("meeting", NullValueHandling = NullValueHandling.Ignore)]
+        public Meeting Meeting { get; set; }
+    }
+}