Add Method to delete whole recipe with their relations and include Mediafiles to Instruction by getting recipe

Francesco.Recipes.World/Repositories/Recipe/IRecipeRepository.cs

@@ -18,5 +18,7 @@
         Task<Recipe> CreateRecipeForCategoryAsync(Category category, string name, string description, Difficulty difficulty, int servings, TimeSpan preparationTime, TimeSpan cookingTime);
 
         Task<IEnumerable<Recipe>> SearchInRecipesAndIngredients(string searchterm);
+
+        Task DeleteRecipeAsync(Guid recipeId);
     }
 }

Francesco.Recipes.World/Repositories/Recipe/RecipeRepository.cs

@@ -38,6 +38,7 @@
              .ThenInclude(ri => ri.Unit)
          .Include(r => r.MediaFiles)
          .Include(r => r.Instructions)
+            .ThenInclude(i => i.MediaFiles)
          .FirstOrDefaultAsync(r => r.Id == recipeId);
         }
 
@@ -182,5 +183,47 @@
                     .ThenInclude(ri => ri.Ingredient)
                 .ToListAsync();
         }
+
+        public async Task DeleteRecipeAsync(Guid recipeId)
+        {
+            var recipe = await GetRecipeByIdAsync(recipeId);
+
+            if (recipe == null)
+            {
+                throw new InvalidDataException($"Rezept mit ID {recipeId} nicht gefunden.");
+            }
+
+            if (recipe.RecipeIngredients != null && recipe.RecipeIngredients.Any())
+            {
+                _context.RecipeIngredients.RemoveRange(recipe.RecipeIngredients);
+            }
+
+            if (recipe.Instructions != null && recipe.Instructions.Any())
+            {
+                foreach (var instruction in recipe.Instructions)
+                {
+                    if (instruction.MediaFiles != null && instruction.MediaFiles.Any())
+                    {
+                        _context.MediaFiles.RemoveRange(instruction.MediaFiles);
+                    }
+                }
+
+                _context.Instructions.RemoveRange(recipe.Instructions);
+            }
+
+            if (recipe.MediaFiles != null && recipe.MediaFiles.Any())
+            {
+                _context.MediaFiles.RemoveRange(recipe.MediaFiles);
+            }
+
+            if (recipe.Favorit != null && recipe.Favorit.Id != Guid.Empty)
+            {
+                _context.Remove(recipe.Favorit);
+            }
+
+            _context.Recipes.Remove(recipe);
+
+            await _context.SaveChangesAsync();
+        }
     }
 }