implement FavoritRepository for managing favorite recipes

Francesco.Recipes.World/Repositories/Favorit/FavoritRepository.cs

@@ -0,0 +1,49 @@
+namespace Francesco.Recipes.World.Repositories.Favorit
+{
+    using Francesco.Recipes.World.Data;
+    using Francesco.Recipes.World.Models.BackendModels.Recipe;
+    using Microsoft.EntityFrameworkCore;
+
+    public class FavoritRepository : IFavoritRepository
+    {
+        private readonly FrancescosRecipesWorldDbContext _context;
+
+        public FavoritRepository(FrancescosRecipesWorldDbContext context)
+        {
+            _context = context;
+        }
+
+        public async Task<IEnumerable<Recipe>> GetFavoriteRecipesAsync()
+        {
+            return await _context.Recipes
+                          .Where(r => r.IsFavorite)
+                          .ToListAsync();
+        }
+
+        public async Task<bool> IsFavoriteAsync(Guid recipeId)
+        {
+            return await _context.Recipes
+                 .AnyAsync(r => r.Id == recipeId && r.IsFavorite);
+        }
+
+        public async Task AddFavoriteAsync(Guid recipeId)
+        {
+            var recipe = await _context.Recipes.FindAsync(recipeId);
+            if (recipe != null && !recipe.IsFavorite)
+            {
+                recipe.IsFavorite = true;
+                await _context.SaveChangesAsync();
+            }
+        }
+
+        public async Task RemoveFavoriteAsync(Guid recipeId)
+        {
+            var recipe = await _context.Recipes.FindAsync(recipeId);
+            if (recipe != null && recipe.IsFavorite)
+            {
+                recipe.IsFavorite = false;
+                await _context.SaveChangesAsync();
+            }
+        }
+    }
+}

Francesco.Recipes.World/Repositories/Favorit/IFavoritRepository.cs

@@ -0,0 +1,15 @@
+namespace Francesco.Recipes.World.Repositories.Favorit
+{
+    using Francesco.Recipes.World.Models.BackendModels.Recipe;
+
+    public interface IFavoritRepository
+    {
+        Task<IEnumerable<Recipe>> GetFavoriteRecipesAsync();
+
+        Task<bool> IsFavoriteAsync(Guid recipeId);
+
+        Task AddFavoriteAsync(Guid recipeId);
+
+        Task RemoveFavoriteAsync(Guid recipeId);
+    }
+}