Add composite destructible thresholds (#3102)

* Add composite destructible thresholds

* Reorder yaml properties

* Update YAML

* Fix YAML

* Re-fix YAML

* Add missing nullable enable

* Go back window component is explosive

* rider

Content.Server/GameObjects/Components/Destructible/Thresholds/Triggers/DamageClassTrigger.cs

@@ -0,0 +1,45 @@
+#nullable enable
+using System;
+using Content.Server.GameObjects.EntitySystems;
+using Content.Shared.Damage;
+using Content.Shared.GameObjects.Components.Damage;
+using Robust.Shared.Interfaces.Serialization;
+using Robust.Shared.Serialization;
+
+namespace Content.Server.GameObjects.Components.Destructible.Thresholds.Triggers
+{
+    /// <summary>
+    ///     A trigger that will activate when the amount of damage received
+    ///     of the specified class is above the specified threshold.
+    /// </summary>
+    [Serializable]
+    public class DamageClassTrigger : IThresholdTrigger
+    {
+        /// <summary>
+        ///     The class to check the damage of.
+        /// </summary>
+        public DamageClass? Class { get; set; }
+
+        /// <summary>
+        ///     The amount of damage at which this threshold will trigger.
+        /// </summary>
+        public int Damage { get; set; }
+
+        void IExposeData.ExposeData(ObjectSerializer serializer)
+        {
+            serializer.DataField(this, x => x.Class, "class", null);
+            serializer.DataField(this, x => x.Damage, "damage", 0);
+        }
+
+        public bool Reached(IDamageableComponent damageable, DestructibleSystem system)
+        {
+            if (Class == null)
+            {
+                return false;
+            }
+
+            return damageable.TryGetDamage(Class.Value, out var damageReceived) &&
+                   damageReceived >= Damage;
+        }
+    }
+}