Adds click parsing entity system (#64)

* Adds click parsing entity system

Instead of every entity system receiving the message and deciding if it individually wants the message, and verifying player information. The click parser system receives the message and parses which system to send it to based on clicktype and sends it.

* Submodule update

Content.Server/GameObjects/EntitySystems/Click/ClickParser.cs

@@ -0,0 +1,70 @@
+using System;
+using SS14.Server.Interfaces.Player;
+using SS14.Shared.GameObjects;
+using SS14.Shared.GameObjects.System;
+using SS14.Shared.Input;
+using SS14.Shared.Interfaces.GameObjects;
+using SS14.Shared.Interfaces.Network;
+using SS14.Shared.IoC;
+
+namespace Content.Server.GameObjects.EntitySystems
+{
+    /// <summary>
+    /// Catches clicks from the client and parses them to relevant entity systems
+    /// </summary>
+    public class ClickParserSystem : EntitySystem
+    {
+        /// <inheritdoc />
+        public override void RegisterMessageTypes()
+        {
+            base.RegisterMessageTypes();
+
+            RegisterMessageType<ClickEventMessage>();
+        }
+
+        /// <summary>
+        /// Grab click events sent from the client input system
+        /// </summary>
+        /// <param name="channel"></param>
+        /// <param name="message"></param>
+        public override void HandleNetMessage(INetChannel channel, EntitySystemMessage message)
+        {
+            base.HandleNetMessage(channel, message);
+
+            var playerMan = IoCManager.Resolve<IPlayerManager>();
+            var session = playerMan.GetSessionByChannel(channel);
+            var playerentity = session.AttachedEntity;
+
+            if (playerentity == null)
+                return;
+
+            switch (message)
+            {
+                case ClickEventMessage msg:
+                    ParseClickMessage(msg, playerentity);
+                    break;
+            }
+        }
+
+        /// <summary>
+        /// Parse click to the relevant entity system
+        /// </summary>
+        /// <param name="message"></param>
+        /// <param name="player"></param>
+        private void ParseClickMessage(ClickEventMessage message, IEntity player)
+        {
+            switch (message.Click)
+            {
+                case ClickType.Left:
+                    EntitySystemManager.GetEntitySystem<InteractionSystem>().UserInteraction(message, player);
+                    break;
+                case (ClickType.Left | ClickType.Shift):
+                    //Examine system
+                    break;
+                case ClickType.Right:
+                    //Verb System
+                    break;
+            }
+        }
+    }
+}