Material cleanup (#4025)

* work

* more work

Content.Server/GameObjects/Components/Materials/MaterialComponent.cs

@@ -0,0 +1,49 @@
+using System.Collections.Generic;
+using Content.Shared.Materials;
+using Robust.Shared.GameObjects;
+using Robust.Shared.IoC;
+using Robust.Shared.Log;
+using Robust.Shared.Prototypes;
+using Robust.Shared.Serialization.Manager.Attributes;
+using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom.Prototype.List;
+using Robust.Shared.ViewVariables;
+
+namespace Content.Server.GameObjects.Components.Materials
+{
+    /// <summary>
+    ///     Component to store data such as "this object is made out of steel".
+    ///     This is not a storage system for say smelteries.
+    /// </summary>
+    [RegisterComponent]
+    public class MaterialComponent : Component
+    {
+        public override string Name => "Material";
+
+        [ViewVariables]
+        [DataField("materials", customTypeSerializer:typeof(PrototypeIdListSerializer<MaterialPrototype>))]
+        // ReSharper disable once CollectionNeverUpdated.Local
+        private readonly List<string> _materials = new();
+        public IEnumerable<string> MaterialIds => _materials;
+
+        /// <summary>
+        ///     Returns all materials which make up this entity.
+        ///     This property has an IoC resolve and is generally slow, so be sure to cache the results if needed.
+        /// </summary>
+        [ViewVariables]
+        public IEnumerable<MaterialPrototype> Materials
+        {
+            get
+            {
+                var prototypeManager = IoCManager.Resolve<IPrototypeManager>();
+
+                foreach (var id in MaterialIds)
+                {
+                    if(prototypeManager.TryIndex<MaterialPrototype>(id, out var material))
+                        yield return material;
+                    else
+                        Logger.Error($"Material prototype {id} does not exist! Entity: {Owner}");
+                }
+            }
+        }
+    }
+}