changeling biomass adjustments for rotting corpses + salvage corpse adjustments

Content.Server/_Goobstation/Changeling/ChangelingSystem.Abilities.cs

@@ -10,6 +10,7 @@
 using Content.Shared.Damage;
 using Robust.Shared.Prototypes;
 using Content.Shared.Damage.Prototypes;
+using Content.Shared.Atmos.Rotting;
 using Content.Server.Objectives.Components;
 using Content.Server.Light.Components;
 using Content.Shared.Eye.Blinding.Systems;
@@ -24,6 +25,8 @@ namespace Content.Server.Changeling;
 
 public sealed partial class ChangelingSystem : EntitySystem
 {
+    [Dependency] private readonly SharedRottingSystem _rotting = default!;
+
     public void SubscribeAbilities()
     {
         SubscribeLocalEvent<ChangelingComponent, OpenEvolutionMenuEvent>(OnOpenEvolutionMenu);
@@ -92,11 +95,17 @@ private void OnAbsorb(EntityUid uid, ChangelingComponent comp, ref AbsorbDNAEven
             _popup.PopupEntity(Loc.GetString("changeling-absorb-fail-unabsorbable"), uid, uid);
             return;
         }
+        if (TryComp<RottingComponent>(target, out var rotComp) && _rotting.RotStage(target, rotComp) >= 2)
+        {
+            _popup.PopupEntity(Loc.GetString("changeling-absorb-fail-extremely-bloated"), uid, uid);
+            return;
+        }
 
         if (!TryUseAbility(uid, comp, args))
             return;
 
         var popupOthers = Loc.GetString("changeling-absorb-start", ("user", Identity.Entity(uid, EntityManager)), ("target", Identity.Entity(target, EntityManager)));
+        _popup.PopupEntity(Loc.GetString("changeling-absorb-rotting"), uid, uid);
         _popup.PopupEntity(popupOthers, uid, PopupType.LargeCaution);
         PlayMeatySound(uid, comp);
         var dargs = new DoAfterArgs(EntityManager, uid, TimeSpan.FromSeconds(15), new AbsorbDNADoAfterEvent(), uid, target)
@@ -123,7 +132,11 @@ private void OnAbsorbDoAfter(EntityUid uid, ChangelingComponent comp, ref Absorb
 
         PlayMeatySound(args.User, comp);
 
-        UpdateBiomass(uid, comp, comp.MaxBiomass - comp.TotalAbsorbedEntities);
+        float biomassModifier = 1f;
+        if (HasComp<RottingComponent>(target))
+            biomassModifier = 0.5f;
+
+        UpdateBiomass(uid, comp, (comp.MaxBiomass * biomassModifier) - comp.TotalAbsorbedEntities);
 
         var dmg = new DamageSpecifier(_proto.Index(AbsorbedDamageGroup), 200);
         _damage.TryChangeDamage(target, dmg, false, false);
@@ -145,7 +158,9 @@ private void OnAbsorbDoAfter(EntityUid uid, ChangelingComponent comp, ref Absorb
         {
             popup = Loc.GetString("changeling-absorb-end-self");
             bonusChemicals += 10;
-            bonusEvolutionPoints += 2;
+
+            if (!HasComp<RottingComponent>(target))
+                bonusEvolutionPoints += 2;
         }
         TryStealDNA(uid, target, comp, true);
         comp.TotalAbsorbedEntities++;

Content.Shared/Atmos/Rotting/RottingComponent.cs

@@ -34,7 +34,7 @@ public sealed partial class RottingComponent : Component
     /// <summary>
     /// How long has this thing been rotting?
     /// </summary>
-    [DataField]
+    [DataField("totalRotTime")]
     public TimeSpan TotalRotTime = TimeSpan.Zero;
 
     /// <summary>

Content.Shared/Atmos/Rotting/SharedRottingSystem.cs

@@ -1,4 +1,5 @@
-using Content.Shared.Examine;
+using Content.Shared.Changeling;
+using Content.Shared.Examine;
 using Content.Shared.IdentityManagement;
 using Content.Shared.Mobs;
 using Content.Shared.Mobs.Components;
@@ -96,6 +97,17 @@ private void OnExamined(EntityUid uid, RottingComponent component, ExaminedEvent
             description += "-nonmob";
 
         args.PushMarkup(Loc.GetString(description, ("target", Identity.Entity(uid, EntityManager))));
+
+        if (HasComp<ChangelingComponent>(args.Examiner) && !HasComp<AbsorbedComponent>(uid))
+        {
+            var changelingDescription = stage switch
+            {
+                >= 2 => "changeling-examine-extremely-bloated",
+                _ => "changeling-examine-rotting"
+            };
+
+            args.PushMarkup(Loc.GetString(changelingDescription, ("target", Identity.Entity(uid, EntityManager))));
+        }
     }
 
     /// <summary>

Resources/Locale/en-US/_Goobstation/changeling/abilities/changeling.ftl

@@ -4,10 +4,14 @@ changeling-chemicals-deficit = Not enough chemicals!
 changeling-action-fail-lesserform = Can't use it while in lesser form!
 changeling-action-fail-absorbed = Need to absorb {$number} more organics to use it!
 
-changeling-absorb-start = {CAPITALIZE(THE($user))} starts absorbing {CAPITALIZE(THE($target))}'s!
+changeling-examine-rotting = [color=yellow]{ CAPITALIZE(POSS-ADJ($target)) } corpse has low biomass and will offer no evolutionary potential.[/color]
+changeling-examine-extremely-bloated = [color=red]{ CAPITALIZE(POSS-ADJ($target)) } corpse is inedible.[/color]
+
+changeling-absorb-start = {CAPITALIZE(THE($user))} starts absorbing {CAPITALIZE(THE($target))}!
 changeling-absorb-fail-incapacitated = You can't absorb it until it's not incapacitated.
 changeling-absorb-fail-absorbed = You've already absorbed it.
 changeling-absorb-fail-unabsorbable = The target is not absorbable.
+changeling-absorb-fail-extremely-bloated = The target is too rotted to absorb.
 changeling-absorb-end-self = Another organic absorbed. You are evolving.
 changeling-absorb-end-self-ling = Another changeling absorbed. You are evolving more rapidly.
 changeling-absorb-onexamine = [color=red]The body feels hollow.[/color]

Resources/Prototypes/Entities/Mobs/NPCs/human.yml

@@ -88,6 +88,8 @@
         Blunt: 19
   - type: Inventory
     templateId: corpse
+  - type: Rotting
+    totalRotTime: 1200 # 20 minutes
 
 - type: entity
   parent: MobHuman