Adds missing reactions to chemical stuff.

- Adds ingestion reaction for food, drinks, and pills.
- Adds injection reaction for syringes.

Content.Server/GameObjects/Components/Nutrition/FoodComponent.cs

@@ -17,6 +17,7 @@ using Robust.Shared.GameObjects;
 using Robust.Shared.Interfaces.GameObjects;
 using Robust.Shared.IoC;
 using Robust.Shared.Localization;
+using Robust.Shared.Prototypes;
 using Robust.Shared.Serialization;
 using Robust.Shared.ViewVariables;
 
@@ -27,6 +28,7 @@ namespace Content.Server.GameObjects.Components.Nutrition
     public class FoodComponent : Component, IUse, IAfterInteract
     {
         [Dependency] private readonly IEntitySystemManager _entitySystem = default!;
+        [Dependency] private readonly IPrototypeManager _prototypeManager = default!;
 
         public override string Name => "Food";
 
@@ -169,13 +171,22 @@ namespace Content.Server.GameObjects.Components.Nutrition
 
             var transferAmount = ReagentUnit.Min(_transferAmount, solution.CurrentVolume);
             var split = solution.SplitSolution(transferAmount);
-            if (!stomach.TryTransferSolution(split))
+            if (!stomach.CanTransferSolution(split))
             {
-                solution.TryAddSolution(split);
                 trueTarget.PopupMessage(user, Loc.GetString("You can't eat any more!"));
                 return false;
             }
 
+            // TODO: Account for partial transfer.
+
+            foreach (var (reagentId, quantity) in split.Contents)
+            {
+                if (!_prototypeManager.TryIndex(reagentId, out ReagentPrototype reagent)) continue;
+                split.RemoveReagent(reagentId, reagent.ReactionEntity(target, ReactionMethod.Ingestion, quantity));
+            }
+
+            stomach.TryTransferSolution(split);
+
             _entitySystem.GetEntitySystem<AudioSystem>()
                 .PlayFromEntity(_useSound, trueTarget, AudioParams.Default.WithVolume(-1f));
             trueTarget.PopupMessage(user, Loc.GetString("Nom"));