H.O.N.K. mech (#14670)

Co-authored-by: deltanedas <@deltanedas:kde.org>

Content.Shared/Mech/Equipment/Systems/MechSoundboardSystem.cs

@@ -0,0 +1,57 @@
+using Content.Shared.Mech;
+using Content.Shared.Mech.Equipment.Components;
+using Content.Shared.Mech.Equipment.Systems;
+using Content.Shared.Timing;
+using Robust.Shared.Audio;
+using System.Linq;
+
+namespace Content.Shared.Mech.Equipment.Systems;
+
+/// <summary>
+/// Handles everything for mech soundboard.
+/// </summary>
+public sealed class MechSoundboardSystem : EntitySystem
+{
+    [Dependency] private readonly SharedAudioSystem _audio = default!;
+    [Dependency] private readonly UseDelaySystem _useDelay = default!;
+
+    public override void Initialize()
+    {
+        base.Initialize();
+
+        SubscribeLocalEvent<MechSoundboardComponent, MechEquipmentUiStateReadyEvent>(OnUiStateReady);
+        SubscribeLocalEvent<MechSoundboardComponent, MechEquipmentUiMessageRelayEvent>(OnSoundboardMessage);
+    }
+
+    private void OnUiStateReady(EntityUid uid, MechSoundboardComponent comp, MechEquipmentUiStateReadyEvent args)
+    {
+        // you have to specify a collection so it must exist probably
+        var sounds = comp.Sounds.Select(sound => sound.Collection!);
+        var state = new MechSoundboardUiState
+        {
+            Sounds = sounds.ToList()
+        };
+        args.States.Add(uid, state);
+    }
+
+    private void OnSoundboardMessage(EntityUid uid, MechSoundboardComponent comp, MechEquipmentUiMessageRelayEvent args)
+    {
+        if (args.Message is not MechSoundboardPlayMessage msg)
+            return;
+
+        if (!TryComp<MechEquipmentComponent>(uid, out var equipment) ||
+            equipment.EquipmentOwner == null)
+            return;
+
+        if (msg.Sound >= comp.Sounds.Count)
+            return;
+
+        if (_useDelay.ActiveDelay(uid))
+            return;
+
+        // honk!!!!!
+        var mech = equipment.EquipmentOwner.Value;
+        _useDelay.BeginDelay(uid);
+        _audio.PlayPvs(comp.Sounds[msg.Sound], uid);
+    }
+}