Basic bleeding mechanics (#6710)

Content.Server/Medical/Components/HealingComponent.cs

@@ -18,6 +18,14 @@ namespace Content.Server.Medical.Components
         [ViewVariables(VVAccess.ReadWrite)]
         public DamageSpecifier Damage = default!;
 
+        /// <remarks>
+        ///     This should generally be negative,
+        ///     since you're, like, trying to heal damage.
+        /// </remarks>
+        [DataField("bloodlossModifier")]
+        [ViewVariables(VVAccess.ReadWrite)]
+        public float BloodlossModifier = 0.0f;
+
         /// <remarks>
         ///     The supported damage types are specified using a <see cref="DamageContainerPrototype"/>s. For a
         ///     HealingComponent this filters what damage container type this component should work on. If null,

Content.Server/Medical/HealingSystem.cs

@@ -1,5 +1,6 @@
 using System.Threading;
 using Content.Server.Administration.Logs;
+using Content.Server.Body.Systems;
 using Content.Server.DoAfter;
 using Content.Server.Medical.Components;
 using Content.Server.Stack;
@@ -17,6 +18,7 @@ public sealed class HealingSystem : EntitySystem
     [Dependency] private readonly ActionBlockerSystem _blocker = default!;
     [Dependency] private readonly AdminLogSystem _logs = default!;
     [Dependency] private readonly DamageableSystem _damageable = default!;
+    [Dependency] private readonly BloodstreamSystem _bloodstreamSystem = default!;
     [Dependency] private readonly DoAfterSystem _doAfter = default!;
     [Dependency] private readonly StackSystem _stacks = default!;
     [Dependency] private readonly SharedInteractionSystem _interactionSystem = default!;
@@ -37,6 +39,12 @@ public sealed class HealingSystem : EntitySystem
         if (component.DamageContainerID is not null &&
             !component.DamageContainerID.Equals(component.DamageContainerID)) return;
 
+        if (args.Component.BloodlossModifier != 0)
+        {
+            // Heal some bloodloss damage.
+            _bloodstreamSystem.TryModifyBleedAmount(uid, args.Component.BloodlossModifier);
+        }
+
         var healed = _damageable.TryChangeDamage(uid, args.Component.Damage, true);
 
         // Reverify that we can heal the damage.