Metabolism tweaks / metabolism 4.0 (#5246)

* Metabolism tweaks

* use MetabolismArgs and convert ReagentEntityReactions into ReagentEffects

* fork forgor 💀

* fixes

Content.Server/Chemistry/ReagentEffects/AddToSolutionReaction.cs

@@ -0,0 +1,31 @@
+using System.Collections.Generic;
+using Content.Server.Chemistry.EntitySystems;
+using Content.Shared.Chemistry.Components;
+using Content.Shared.Chemistry.Reagent;
+using Content.Shared.FixedPoint;
+using JetBrains.Annotations;
+using Robust.Shared.GameObjects;
+using Robust.Shared.Serialization.Manager.Attributes;
+using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom.Prototype.Set;
+
+namespace Content.Server.Chemistry.ReagentEffects
+{
+    [UsedImplicitly]
+    public class AddToSolutionReaction : ReagentEffect
+    {
+        [DataField("solution")]
+        private string _solution = "reagents";
+
+        public override void Metabolize(ReagentEffectArgs args)
+        {
+            // TODO see if this is correct
+            if (!EntitySystem.Get<SolutionContainerSystem>()
+                    .TryGetSolution(args.SolutionEntity, _solution, out var solutionContainer))
+                return;
+
+            if (EntitySystem.Get<SolutionContainerSystem>()
+                .TryAddReagent(args.SolutionEntity, solutionContainer, args.Reagent.ID, args.Metabolizing, out var accepted))
+                args.Source?.RemoveReagent(args.Reagent.ID, accepted);
+        }
+    }
+}