From 17d72639739ceac51ae60c3d138e55080d694791 Mon Sep 17 00:00:00 2001
From: Garry Newman <garrynewman@users.noreply.github.com>
Date: Tue, 14 May 2019 16:05:28 +0100
Subject: [PATCH] Added InventoryDef.GetRecipesContainingThis()

---
 Facepunch.Steamworks/Structs/InventoryDef.cs  | 19 +++++++++++++++++++
 .../Structs/InventoryRecipe.cs                |  5 +++++
 2 files changed, 24 insertions(+)

diff --git a/Facepunch.Steamworks/Structs/InventoryDef.cs b/Facepunch.Steamworks/Structs/InventoryDef.cs
index f93368e..45e6028 100644
--- a/Facepunch.Steamworks/Structs/InventoryDef.cs
+++ b/Facepunch.Steamworks/Structs/InventoryDef.cs
@@ -201,5 +201,24 @@ public int LocalBasePrice
 		}
 
 		public string LocalBasePriceFormatted => Utility.FormatPrice( SteamInventory.Currency, LocalPrice / 100.0 );
+
+		InventoryRecipe[] _recContaining;
+
+		/// <summary>
+		/// Return a list of recepies that contain this item
+		/// </summary>
+		public InventoryRecipe[] GetRecipesContainingThis()
+		{
+			if ( _recContaining != null ) return _recContaining;
+
+			var allRec = SteamInventory.Definitions
+							.Select( x => x.GetRecipes() )
+							.Where( x => x != null ) 
+							.SelectMany( x => x );
+
+			_recContaining = allRec.Where( x => x.ContainsIngredient( this ) ).ToArray();
+			return _recContaining;
+		}
+
 	}
 }
\ No newline at end of file
diff --git a/Facepunch.Steamworks/Structs/InventoryRecipe.cs b/Facepunch.Steamworks/Structs/InventoryRecipe.cs
index 9131a7d..03384e8 100644
--- a/Facepunch.Steamworks/Structs/InventoryRecipe.cs
+++ b/Facepunch.Steamworks/Structs/InventoryRecipe.cs
@@ -82,5 +82,10 @@ internal static InventoryRecipe FromString( string part, InventoryDef Result )
 			r.Ingredients = parts.Select( x => Ingredient.FromString( x ) ).Where( x => x.DefinitionId != 0 ).ToArray();
 			return r;
 		}
+
+		internal bool ContainsIngredient( InventoryDef inventoryDef )
+		{
+			return Ingredients.Any( x => x.DefinitionId == inventoryDef.Id );
+		}
 	}
 }
\ No newline at end of file