Flatpacks and the Flatpacker 1001 (#23338)

* Flatpacker and flatpacks

* ok that's good enough

* convert solars/AME to flatpacks

* mats, mats, we are the mats

* basic mechanics are DONE

* thing

* final UI

* sloth

* rped jumpscare

* rename

Content.Shared/Lathe/SharedLatheSystem.cs

@@ -1,8 +1,10 @@
+using System.Diagnostics.CodeAnalysis;
 using Content.Shared.Emag.Systems;
 using Content.Shared.Materials;
 using Content.Shared.Research.Prototypes;
 using JetBrains.Annotations;
 using Robust.Shared.Prototypes;
+using Robust.Shared.Utility;
 
 namespace Content.Shared.Lathe;
 
@@ -14,11 +16,15 @@ public abstract class SharedLatheSystem : EntitySystem
     [Dependency] private readonly IPrototypeManager _proto = default!;
     [Dependency] private readonly SharedMaterialStorageSystem _materialStorage = default!;
 
+    private readonly Dictionary<string, List<LatheRecipePrototype>> _inverseRecipeDictionary = new();
+
     public override void Initialize()
     {
         base.Initialize();
 
         SubscribeLocalEvent<EmagLatheRecipesComponent, GotEmaggedEvent>(OnEmagged);
+        SubscribeLocalEvent<PrototypesReloadedEventArgs>(OnPrototypesReloaded);
+        BuildInverseRecipeDictionary();
     }
 
     [PublicAPI]
@@ -53,4 +59,28 @@ public abstract class SharedLatheSystem : EntitySystem
         => reduce ? (int) MathF.Ceiling(original * multiplier) : original;
 
     protected abstract bool HasRecipe(EntityUid uid, LatheRecipePrototype recipe, LatheComponent component);
+
+    private void OnPrototypesReloaded(PrototypesReloadedEventArgs obj)
+    {
+        if (!obj.WasModified<LatheRecipePrototype>())
+            return;
+        BuildInverseRecipeDictionary();
+    }
+
+    private void BuildInverseRecipeDictionary()
+    {
+        _inverseRecipeDictionary.Clear();
+        foreach (var latheRecipe in _proto.EnumeratePrototypes<LatheRecipePrototype>())
+        {
+            _inverseRecipeDictionary.GetOrNew(latheRecipe.Result).Add(latheRecipe);
+        }
+    }
+
+    public bool TryGetRecipesFromEntity(string prototype, [NotNullWhen(true)] out List<LatheRecipePrototype>? recipes)
+    {
+        recipes = new();
+        if (_inverseRecipeDictionary.TryGetValue(prototype, out var r))
+            recipes.AddRange(r);
+        return recipes.Count != 0;
+    }
 }