mech bug fixes (#13155)

* mech bug fixes

* struct events

* fug

Content.Server/Mech/Equipment/EntitySystems/MechGrabberSystem.cs

@@ -7,6 +7,7 @@ using Content.Server.Mech.Systems;
 using Content.Shared.Interaction;
 using Content.Shared.Mech;
 using Content.Shared.Mech.Equipment.Components;
+using Content.Shared.MobState.Components;
 using Content.Shared.Wall;
 using Robust.Shared.Containers;
 using Robust.Shared.Map;
@@ -115,17 +116,17 @@ public sealed class MechGrabberSystem : EntitySystem
 
     private void OnInteract(EntityUid uid, MechGrabberComponent component, InteractNoHandEvent args)
     {
-        if (args.Handled || args.Target == null)
+        if (args.Handled || args.Target is not {} target)
             return;
 
-        var xform = Transform(args.Target.Value);
-        if (xform.Anchored || HasComp<WallMountComponent>(args.Target.Value))
+        var xform = Transform(target);
+        if (xform.Anchored || HasComp<WallMountComponent>(target) || HasComp<MobStateComponent>(target))
             return;
 
         if (component.ItemContainer.ContainedEntities.Count >= component.MaxContents)
             return;
 
-        if (!TryComp<MechComponent>(args.User, out var mech))
+        if (!TryComp<MechComponent>(args.User, out var mech) || mech.PilotSlot.ContainedEntity == target)
             return;
 
         if (mech.Energy + component.GrabEnergyDelta < 0)
@@ -134,17 +135,17 @@ public sealed class MechGrabberSystem : EntitySystem
         if (component.Token != null)
             return;
 
-        if (!_interaction.InRangeUnobstructed(args.User, args.Target.Value))
+        if (!_interaction.InRangeUnobstructed(args.User, target))
             return;
 
         args.Handled = true;
         component.Token = new();
         component.AudioStream = _audio.PlayPvs(component.GrabSound, uid);
-        _doAfter.DoAfter(new DoAfterEventArgs(args.User, component.GrabDelay, component.Token.Token, args.Target, uid)
+        _doAfter.DoAfter(new DoAfterEventArgs(args.User, component.GrabDelay, component.Token.Token, target, uid)
         {
             BreakOnTargetMove = true,
             BreakOnUserMove = true,
-            UsedFinishedEvent = new MechGrabberGrabFinishedEvent(args.Target.Value),
+            UsedFinishedEvent = new MechGrabberGrabFinishedEvent(target),
             UsedCancelledEvent = new MechGrabberGrabCancelledEvent()
         });
     }

Content.Server/Mech/Systems/MechSystem.cs

@@ -4,6 +4,7 @@ using Content.Server.Atmos.EntitySystems;
 using Content.Server.DoAfter;
 using Content.Server.Mech.Components;
 using Content.Server.Power.Components;
+using Content.Server.Tools;
 using Content.Server.Wires;
 using Content.Shared.Damage;
 using Content.Shared.FixedPoint;
@@ -52,6 +53,7 @@ public sealed class MechSystem : SharedMechSystem
         SubscribeLocalEvent<MechComponent, DamageChangedEvent>(OnDamageChanged);
         SubscribeLocalEvent<MechComponent, MechEquipmentRemoveMessage>(OnRemoveEquipmentMessage);
 
+        SubscribeLocalEvent<MechPilotComponent, ToolUserAttemptUseEvent>(OnToolUseAttempt);
         SubscribeLocalEvent<MechPilotComponent, InhaleLocationEvent>(OnInhale);
         SubscribeLocalEvent<MechPilotComponent, ExhaleLocationEvent>(OnExhale);
         SubscribeLocalEvent<MechPilotComponent, AtmosExposedGetAirEvent>(OnExpose);
@@ -137,6 +139,12 @@ public sealed class MechSystem : SharedMechSystem
         ToggleMechUi(uid, component);
     }
 
+    private void OnToolUseAttempt(EntityUid uid, MechPilotComponent component, ref ToolUserAttemptUseEvent args)
+    {
+        if (args.Target == component.Mech)
+            args.Cancelled = true;
+    }
+
     private void OnAlternativeVerb(EntityUid uid, MechComponent component, GetVerbsEvent<AlternativeVerb> args)
     {
         if (!args.CanAccess || !args.CanInteract || component.Broken)

Content.Server/Tools/ToolSystem.cs

@@ -119,6 +119,11 @@ namespace Content.Server.Tools
             if (!Resolve(tool, ref toolComponent, false))
                 return false;
 
+            var ev = new ToolUserAttemptUseEvent(user, target);
+            RaiseLocalEvent(user, ref ev);
+            if (ev.Cancelled)
+                return false;
+
             if (!ToolStartUse(tool, user, fuel, toolQualitiesNeeded, toolComponent))
                 return false;
 
@@ -173,6 +178,11 @@ namespace Content.Server.Tools
             if (!Resolve(tool, ref toolComponent, false))
                 return false;
 
+            var ev = new ToolUserAttemptUseEvent(user, target);
+            RaiseLocalEvent(user, ref ev);
+            if (ev.Cancelled)
+                return false;
+
             if (!ToolStartUse(tool, user, fuel, toolQualitiesNeeded, toolComponent))
                 return false;
 
@@ -306,6 +316,23 @@ namespace Content.Server.Tools
         }
     }
 
+    /// <summary>
+    /// Event raised on the user of a tool to see if they can actually use it.
+    /// </summary>
+    [ByRefEvent]
+    public struct ToolUserAttemptUseEvent
+    {
+        public EntityUid User;
+        public EntityUid? Target;
+        public bool Cancelled = false;
+
+        public ToolUserAttemptUseEvent(EntityUid user, EntityUid? target)
+        {
+            User = user;
+            Target = target;
+        }
+    }
+
     /// <summary>
     ///     Attempt event called *after* any do afters to see if the tool usage should succeed or not.
     ///     You can use this event to consume any fuel needed.

Content.Shared/Mech/EntitySystems/SharedMechSystem.cs

@@ -4,9 +4,9 @@ using Content.Shared.Access.Systems;
 using Content.Shared.ActionBlocker;
 using Content.Shared.Actions;
 using Content.Shared.Actions.ActionTypes;
-using Content.Shared.Body.Components;
 using Content.Shared.Destructible;
 using Content.Shared.FixedPoint;
+using Content.Shared.Hands.Components;
 using Content.Shared.Interaction;
 using Content.Shared.Interaction.Components;
 using Content.Shared.Interaction.Events;
@@ -18,7 +18,6 @@ using Content.Shared.Popups;
 using Content.Shared.Weapons.Melee;
 using Robust.Shared.Containers;
 using Robust.Shared.GameStates;
-using Robust.Shared.Player;
 using Robust.Shared.Prototypes;
 using Robust.Shared.Timing;
 
@@ -374,7 +373,7 @@ public abstract class SharedMechSystem : EntitySystem
         if (!Resolve(uid, ref component))
             return false;
 
-        return IsEmpty(component) && _actionBlocker.CanMove(toInsert) && HasComp<BodyComponent>(toInsert);
+        return IsEmpty(component) && _actionBlocker.CanMove(toInsert) && HasComp<SharedHandsComponent>(toInsert);
     }
 
     /// <summary>

Resources/Locale/en-US/mech/mech.ftl

@@ -1,5 +1,5 @@
 mech-verb-enter = Enter
-mech-verb-exit = Exit
+mech-verb-exit = Remove pilot
 
 mech-equipment-begin-install = Installing the {THE($item)}...
 mech-equipment-finish-install = Finished installing the {THE($item)}