update service

src/main/java/ntnu/idatt2016/v233/SmartMat/service/RecipeService.java

+package ntnu.idatt2016.v233.SmartMat.service;
+
+import ntnu.idatt2016.v233.SmartMat.entity.Recipe;
+import ntnu.idatt2016.v233.SmartMat.repository.RecipeRepository;
+
+import java.util.List;
+import java.util.Optional;
+
+/**
+ * This class defines the methods for the recipe service
+ * 
+ * @author Stian Lyng
+ * @version 1.0
+ */
+public class RecipeService {
+    
+    /**
+     * The recipe repository
+     */
+    private RecipeRepository recipeRepository;
+
+    /**
+     * Creates a new recipe service
+     * @param recipeRepository
+     */
+    public RecipeService (RecipeRepository recipeRepository) {
+        this.recipeRepository = recipeRepository;
+    }
+    
+    /**
+     * Gets a recipe by its id
+     * 
+     * @param id the id of the recipe
+     * @return an optional containing the recipe if it exists
+     */
+    public Optional<Recipe> getRecipeById(Long id) {
+        return recipeRepository.findById(id);
+    } 
+    
+    /**
+     * Gets all recipes with a given name
+     * 
+     * @param name the name of the recipe
+     * @return a list of recipes with the given name
+     */
+    public List<Recipe> getRecipesByName(String name) {
+        return recipeRepository.getByName(name);
+    }
+    
+    /**
+     * Gets all recipes
+     * 
+     * @return a list of all recipes
+     */
+    public List<Recipe> getAllRecipes() {
+        return recipeRepository.findAll();
+    }
+    
+    /**
+     * Saves a recipe
+     * 
+     * @param recipe the recipe to save
+     * @return the saved recipe
+     */
+    public Recipe saveRecipe(Recipe recipe) {
+        return recipeRepository.save(recipe);
+    }
+
+    /**
+     * Deletes a recipe
+     * 
+     * @param recipe a recipe object to delete
+     */
+    public void deleteRecipe(Recipe recipe) {
+        recipeRepository.delete(recipe);
+    }
+
+    /**
+     * Deletes a recipe by its id
+     *
+     * @param id the id of the recipe to delete
+     */
+    public void deleteRecipeById(Long id) {
+        recipeRepository.deleteById(id);
+    }
+
+}
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