Predict DestructibleSystem, Part 1: IThresholdTrigger (#40876)

part 1

Content.Shared/EntityConditions/Conditions/DamageGroupEntityConditionSystem.cs

@@ -0,0 +1,38 @@
+using Content.Shared.Damage;
+using Content.Shared.Damage.Prototypes;
+using Content.Shared.FixedPoint;
+using Robust.Shared.Prototypes;
+
+namespace Content.Shared.EntityConditions.Conditions;
+
+/// <summary>
+/// Returns true if this entity can take damage and if its damage of a given damage group is within a specified minimum and maximum.
+/// </summary>
+/// <inheritdoc cref="EntityConditionSystem{T, TCondition}"/>
+public sealed partial class DamageGroupEntityConditionSystem : EntityConditionSystem<DamageableComponent, DamageGroupCondition>
+{
+    protected override void Condition(Entity<DamageableComponent> entity, ref EntityConditionEvent<DamageGroupCondition> args)
+    {
+        var value = entity.Comp.DamagePerGroup[args.Condition.DamageGroup];
+        args.Result = value >= args.Condition.Min && value <= args.Condition.Max;
+    }
+}
+
+/// <inheritdoc cref="EntityCondition"/>
+public sealed partial class DamageGroupCondition : EntityConditionBase<DamageGroupCondition>
+{
+    [DataField]
+    public FixedPoint2 Max = FixedPoint2.MaxValue;
+
+    [DataField]
+    public FixedPoint2 Min = FixedPoint2.Zero;
+
+    [DataField(required: true)]
+    public ProtoId<DamageGroupPrototype> DamageGroup;
+
+    public override string EntityConditionGuidebookText(IPrototypeManager prototype) =>
+        Loc.GetString("reagent-effect-condition-guidebook-group-damage",
+            ("max", Max == FixedPoint2.MaxValue ? int.MaxValue : Max.Float()),
+            ("min", Min.Float()),
+            ("type", prototype.Index(DamageGroup).LocalizedName));
+}