Vehicles (#7336)

Content.Server/Vehicle/RiderSystem.cs

@@ -0,0 +1,57 @@
+using Content.Server.Buckle.Components;
+using Content.Shared.Vehicle.Components;
+using Content.Shared.MobState;
+using Content.Server.Standing;
+using Content.Shared.Hands;
+
+namespace Content.Server.Vehicle
+{
+    public sealed class RiderSystem : EntitySystem
+    {
+        public override void Initialize()
+        {
+            base.Initialize();
+            SubscribeLocalEvent<RiderComponent, VirtualItemDeletedEvent>(OnVirtualItemDeleted);
+            SubscribeLocalEvent<RiderComponent, FellDownEvent>(OnFallDown);
+            SubscribeLocalEvent<RiderComponent, MobStateChangedEvent>(OnMobStateChanged);
+        }
+
+        /// <summary>
+        /// Kick the rider off the vehicle if they press q / drop the virtual item
+        /// </summary>
+        private void OnVirtualItemDeleted(EntityUid uid, RiderComponent component, VirtualItemDeletedEvent args)
+        {
+            if (args.BlockingEntity == component.Vehicle?.Owner)
+            {
+                UnbuckleFromVehicle(uid);
+            }
+        }
+
+        /// <summary>
+        /// Kick the rider off the vehicle if they get stunned
+        /// </summary>
+        private void OnFallDown(EntityUid uid, RiderComponent rider, FellDownEvent args)
+        {
+           UnbuckleFromVehicle(uid);
+        }
+
+        /// <summary>
+        /// Kick the rider off the vehicle if they go into crit or die.
+        /// </summary>
+        private void OnMobStateChanged(EntityUid uid, RiderComponent rider, MobStateChangedEvent args)
+        {
+            if (args.Component.IsCritical() || args.Component.IsDead())
+            {
+                UnbuckleFromVehicle(uid);
+            }
+        }
+
+        private void UnbuckleFromVehicle(EntityUid uid)
+        {
+            if (!TryComp<BuckleComponent>(uid, out var buckle))
+                return;
+
+            buckle.TryUnbuckle(uid, true);
+        }
+    }
+}