public interface RecipeService {
    @GET("recipes")
    Call<List<Recipe>> getRecipes();

    @GET("recipes/{recipeId}")
    Call<Recipe> getRecipeById(@Path("recipeId") long recipeId);

    @POST("recipes")
    Call<Recipe> createRecipe(@Body Recipe recipe);

    @DELETE("recipes/delete/{recipeId}")
    Call<Recipe> deleteRecipe(@Path("recipeId") long recipeId);

    @PUT("recipes/{recipeId}/editname")
    Call<Recipe> changeRecipeName(@Path("recipeId") long recipeId, String recipeName);

    @GET("recipes/{recipeId}/ingredients")
    Call<Ingredient> getAllIngredientsInRecipe(@Path("recipeId") long recipeId);

    @POST("recipes/{recipeId}/ingredients/add")
    Call<Ingredient> addIngredientToRecipe(@Path("recipeId") long recipeId, String ingredientName);

    @POST("recipes/{recipeId}/ingredients/addmany")
    Call<Ingredient> addIngredientsToRecipe(@Path("recipeId") long recipeId, List<String> ingredients);

    @DELETE("recipes/{recipeId}/ingredients/delete/{ingredientName}")
    Call<Ingredient> removeIngredientFromRecipe(@Path("recipeId") long recipeId, @Path("ingredientName") String ingredientName);

    @DELETE("recipes/{recipeId}/ingredients/deletemany")
    Call<Ingredient> removeIngredientsFromRecipe(@Path("recipeId") long recipeId, List<String> ingredients);
}








GET metod för att hämta hem en lista från ett Rest API
Retrofit retrofit = new Retrofit.Builder()
                .baseUrl(Constants.RESTAPI_BASE_URL)
                .addConverterFactory(GsonConverterFactory.create())
                .build();
        RecipeService service = retrofit.create(RecipeService.class);
        Call<List<Recipe>> call = service.getRecipes();
        call.enqueue(new Callback<List<Recipe>>() {
            @Override
            public void onResponse(Call<List<Recipe>> call, Response<List<Recipe>> response) {
                adapter = new RecipesRecyclerAdapter(response.body());
                recyclerView.setAdapter(adapter);
            }

            @Override
            public void onFailure(Call<List<Recipe>> call, Throwable t) {

            }
        });



POST metod för att posta till ett rest API, kan även göras genom en service för att få det mer async
Retrofit retrofit = new Retrofit.Builder()
                .baseUrl(Constants.RESTAPI_BASE_URL)
                .addConverterFactory(GsonConverterFactory.create())
                .build();
        RecipeService service = retrofit.create(RecipeService.class);
        Recipe recipe = new Recipe("Testing Post Function");
        Call<Recipe> call = service.createRecipe(recipe);
        call.enqueue(new Callback<Recipe>() {
            @Override
            public void onResponse(Call<Recipe> call, Response<Recipe> response) {
                if(call.isExecuted() && response.isSuccessful()){
                    Log.d("Rest POST", response.message());
                }
            }

            @Override
            public void onFailure(Call<Recipe> call, Throwable t) {

            }
        });