Merge branch 'master' into 2020-04-28-tool-component

# Conflicts:
#	Content.Server/GameObjects/Components/AnchorableComponent.cs
#	Content.Server/GameObjects/Components/Gravity/GravityGeneratorComponent.cs
#	Content.Server/GameObjects/Components/Interactable/Tools/CrowbarComponent.cs
#	Content.Server/GameObjects/Components/Power/PowerTransferComponent.cs
#	Content.Server/GameObjects/Components/WiresComponent.cs
#	Content.Server/GameObjects/EntitySystems/Click/InteractionSystem.cs
#	Resources/Prototypes/Entities/Items/tools.yml

Content.Shared/GameObjects/Components/Instruments/SharedInstrumentComponent.cs

@@ -1,4 +1,5 @@
 using System;
+using Content.Shared.BodySystem;
 using Robust.Shared.Audio.Midi;
 using Robust.Shared.GameObjects;
 using Robust.Shared.Serialization;
@@ -9,6 +10,10 @@ namespace Content.Shared.GameObjects.Components.Instruments
     {
         public override string Name => "Instrument";
         public override uint? NetID => ContentNetIDs.INSTRUMENTS;
+
+        public virtual void Update(float delta)
+        {
+        }
     }
 
 
@@ -20,19 +25,39 @@ namespace Content.Shared.GameObjects.Components.Instruments
     {
     }
 
+    /// <summary>
+    ///     This message is sent to the client to start the synth.
+    /// </summary>
+    [Serializable, NetSerializable]
+    public class InstrumentStartMidiMessage : ComponentMessage
+    {
+
+    }
+
     /// <summary>
     ///     This message carries a MidiEvent to be played on clients.
     /// </summary>
     [Serializable, NetSerializable]
     public class InstrumentMidiEventMessage : ComponentMessage
     {
-        public MidiEvent MidiEvent;
-        public double Timestamp;
+        public MidiEvent[] MidiEvent;
 
-        public InstrumentMidiEventMessage(MidiEvent midiEvent, double timestamp)
+        public InstrumentMidiEventMessage(MidiEvent[] midiEvent)
         {
             MidiEvent = midiEvent;
-            Timestamp = timestamp;
+        }
+    }
+
+    [Serializable, NetSerializable]
+    public class InstrumentState : ComponentState
+    {
+        public bool Playing { get; }
+        public uint SequencerTick { get; }
+
+        public InstrumentState(bool playing, uint sequencerTick = 0) : base(ContentNetIDs.INSTRUMENTS)
+        {
+            Playing = playing;
+            SequencerTick = sequencerTick;
         }
     }