Make instruments ECS (#5516)

Content.Shared/Instruments/SharedInstrumentSystem.cs

@@ -0,0 +1,50 @@
+using Robust.Shared.GameObjects;
+using Robust.Shared.GameStates;
+
+namespace Content.Shared.Instruments;
+
+public abstract class SharedInstrumentSystem : EntitySystem
+{
+    public override void Initialize()
+    {
+        base.Initialize();
+
+        SubscribeLocalEvent<SharedInstrumentComponent, ComponentGetState>(OnGetState);
+        SubscribeLocalEvent<SharedInstrumentComponent, ComponentHandleState>(OnHandleState);
+    }
+
+    public virtual void SetupRenderer(EntityUid uid, bool fromStateChange, SharedInstrumentComponent? instrument = null)
+    { }
+
+    public virtual void EndRenderer(EntityUid uid, bool fromStateChange, SharedInstrumentComponent? instrument = null)
+    { }
+
+    private void OnGetState(EntityUid uid, SharedInstrumentComponent instrument, ref ComponentGetState args)
+    {
+        args.State =
+            new InstrumentState(instrument.Playing, instrument.InstrumentProgram, instrument.InstrumentBank,
+                instrument.AllowPercussion, instrument.AllowProgramChange, instrument.RespectMidiLimits, instrument.LastSequencerTick);
+    }
+
+    private void OnHandleState(EntityUid uid, SharedInstrumentComponent instrument, ref ComponentHandleState args)
+    {
+        if (args.Current is not InstrumentState state)
+            return;
+
+        if (state.Playing)
+        {
+            SetupRenderer(uid, true, instrument);
+        }
+        else
+        {
+            EndRenderer(uid, true, instrument);
+        }
+
+        instrument.Playing = state.Playing;
+        instrument.AllowPercussion = state.AllowPercussion;
+        instrument.AllowProgramChange = state.AllowProgramChange;
+        instrument.InstrumentBank = state.InstrumentBank;
+        instrument.InstrumentProgram = state.InstrumentProgram;
+        instrument.DirtyRenderer = true;
+    }
+}