Crawling Fixes Part 4: Can't crawl when weightless. (#39099)

* Init Commit

* Typos

* Commit 2

* Save Interaction Test Mob from failing

* ssss

* Confident I've gotten all the correct prototypes

* Whoops forgot to edit those

* aaaaa

* Better solution

* Test fail fixes

* Yaml fix

* THE FINAL TEST FIX

* Final fix(?)

* whoops

* Added a WeightlessnessChangedEvent

* Check out this diff

* Wait I'm dumb

* Final optimization and don't duplicate code

* Death to IsWeightless

* Moth directed targeted attack

* A

* Bugfixes and such

* Grrr

* Death

* Cleanup

* Cleanup 2

---------

Co-authored-by: Princess Cheeseballs <66055347+Pronana@users.noreply.github.com>

Content.Server/Stunnable/Systems/StunOnCollideSystem.cs

@@ -22,7 +22,7 @@ internal sealed class StunOnCollideSystem : EntitySystem
 
     private void TryDoCollideStun(Entity<StunOnCollideComponent> ent, EntityUid target)
     {
-        _stunSystem.TryKnockdown(target, ent.Comp.KnockdownAmount, ent.Comp.Refresh, ent.Comp.AutoStand, ent.Comp.Drop);
+        _stunSystem.TryKnockdown(target, ent.Comp.KnockdownAmount, ent.Comp.Refresh, ent.Comp.AutoStand, ent.Comp.Drop, true);
 
         if (ent.Comp.Refresh)
         {

Content.Shared/Stunnable/SharedStunSystem.Knockdown.cs

@@ -4,6 +4,7 @@ using Content.Shared.Damage;
 using Content.Shared.Damage.Components;
 using Content.Shared.Database;
 using Content.Shared.DoAfter;
+using Content.Shared.Gravity;
 using Content.Shared.Hands.EntitySystems;
 using Content.Shared.Input;
 using Content.Shared.Movement.Events;
@@ -60,6 +61,9 @@ public abstract partial class SharedStunSystem
         // Crawling
         SubscribeLocalEvent<CrawlerComponent, KnockedDownRefreshEvent>(OnKnockdownRefresh);
         SubscribeLocalEvent<CrawlerComponent, DamageChangedEvent>(OnDamaged);
+        SubscribeLocalEvent<KnockedDownComponent, WeightlessnessChangedEvent>(OnWeightlessnessChanged);
+        SubscribeLocalEvent<GravityAffectedComponent, KnockDownAttemptEvent>(OnKnockdownAttempt);
+        SubscribeLocalEvent<GravityAffectedComponent, GetStandUpTimeEvent>(OnGetStandUpTime);
 
         // Handling Alternative Inputs
         SubscribeAllEvent<ForceStandUpEvent>(OnForceStandup);
@@ -488,6 +492,32 @@ public abstract partial class SharedStunSystem
         args.SpeedModifier *= entity.Comp.SpeedModifier;
     }
 
+    private void OnWeightlessnessChanged(Entity<KnockedDownComponent> entity, ref WeightlessnessChangedEvent args)
+    {
+        // I probably don't need this check since weightless -> non-weightless you shouldn't be knocked down
+        // But you never know.
+        if (!args.Weightless)
+            return;
+
+        // Targeted moth attack
+        CancelKnockdownDoAfter((entity, entity.Comp));
+        RemComp<KnockedDownComponent>(entity);
+    }
+
+    private void OnKnockdownAttempt(Entity<GravityAffectedComponent> entity, ref KnockDownAttemptEvent args)
+    {
+        // Directed, targeted moth attack.
+        if (entity.Comp.Weightless)
+            args.Cancelled = true;
+    }
+
+    private void OnGetStandUpTime(Entity<GravityAffectedComponent> entity, ref GetStandUpTimeEvent args)
+    {
+        // Get up instantly if weightless
+        if (entity.Comp.Weightless)
+            args.DoAfterTime = TimeSpan.Zero;
+    }
+
     #endregion
 
     #region Action Blockers