Add strange pills, RandomFillSolutionComponent (#15067)

Content.Server/Chemistry/EntitySystems/SolutionRandomFillSystem.cs

@@ -0,0 +1,37 @@
+using Content.Server.Chemistry.Components.SolutionManager;
+using Content.Shared.Chemistry.Reagent;
+using Content.Shared.Random;
+using Content.Shared.Random.Helpers;
+using Robust.Shared.Prototypes;
+using Robust.Shared.Random;
+
+namespace Content.Server.Chemistry.EntitySystems;
+
+public sealed class SolutionRandomFillSystem : EntitySystem
+{
+    [Dependency] private readonly SolutionContainerSystem _solutionsSystem = default!;
+    [Dependency] private readonly IPrototypeManager _proto = default!;
+    [Dependency] private readonly IRobustRandom _random = default!;
+
+    public override void Initialize()
+    {
+        base.Initialize();
+
+        SubscribeLocalEvent<RandomFillSolutionComponent, MapInitEvent>(OnRandomSolutionFillMapInit);
+    }
+
+    public void OnRandomSolutionFillMapInit(EntityUid uid, RandomFillSolutionComponent component, MapInitEvent args)
+    {
+        var target = _solutionsSystem.EnsureSolution(uid, component.Solution);
+        var reagent = _proto.Index<WeightedRandomPrototype>(component.WeightedRandomId).Pick(_random);
+
+        if (!_proto.TryIndex<ReagentPrototype>(reagent, out ReagentPrototype? reagentProto))
+        {
+            Logger.Error(
+                $"Tried to add invalid reagent Id {reagent} using SolutionRandomFill.");
+            return;
+        }
+
+        target.AddReagent(reagent, component.Quantity);
+    }
+}