Urist's damage and health thing. (#10)

* Add prototype for temperature testing entity.

* Add Damageable, Destructible, Temperature. Add a prototype based on those.

* Works and cleaned up.

* Nerf

Content.Server/GameObjects/Components/Damage/DestructibleComponent.cs

@@ -0,0 +1,78 @@
+using System;
+using System.Collections.Generic;
+using SS14.Shared.GameObjects;
+using SS14.Shared.Log;
+using SS14.Shared.Utility;
+using YamlDotNet.RepresentationModel;
+using Content.Server.Interfaces;
+using Content.Shared.GameObjects;
+
+
+namespace Content.Server.GameObjects
+{
+    /// <summary>
+    /// Deletes the entity once a certain damage threshold has been reached.
+    /// </summary>
+    public class DestructibleComponent : Component, IOnDamageBehavior
+    {
+        /// <inheritdoc />
+        public override string Name => "Destructible";
+
+        /// <inheritdoc />
+        public override uint? NetID => ContentNetIDs.DESTRUCTIBLE;
+
+        /// <summary>
+        /// Damage threshold calculated from the values
+        /// given in the prototype declaration.
+        /// </summary>
+        public DamageThreshold Threshold { get; private set; }
+
+        /// <inheritdoc />
+        public override void LoadParameters(YamlMappingNode mapping)
+        {
+            //TODO currently only supports one threshold pair; gotta figure out YAML better
+
+            YamlNode node;
+
+            DamageType damageType = DamageType.Total;
+            int damageValue = 0;
+
+            if (mapping.TryGetNode("thresholdtype", out node))
+            {
+                damageType = node.AsEnum<DamageType>();
+            }
+            if (mapping.TryGetNode("thresholdvalue", out node))
+            {
+                damageValue = node.AsInt();
+            }
+
+            Threshold = new DamageThreshold(damageType, damageValue);
+        }
+
+        /// <inheritdoc />
+        public override void Initialize()
+        {
+            base.Initialize();
+
+            if (Owner.TryGetComponent<DamageableComponent>(out DamageableComponent damageable))
+            {
+                damageable.DamageThresholdPassed += OnDamageThresholdPassed;
+            }
+        }
+
+        /// <inheritdoc />
+        public List<DamageThreshold> GetAllDamageThresholds()
+        {
+            return new List<DamageThreshold>() { Threshold };
+        }
+
+        /// <inheritdoc />
+        public void OnDamageThresholdPassed(object obj, DamageThresholdPassedEventArgs e)
+        {
+            if (e.Passed && e.DamageThreshold == Threshold)
+            {
+                Owner.EntityManager.DeleteEntity(Owner);
+            }
+        }
+    }
+}