recipe ingredient relations and API calls established

demo/src/main/java/com/example/demo/controller/RecipeController.java

@@ -1,5 +1,70 @@
 package com.example.demo.controller;
 
-public class RecipeController {
+import java.util.List;
 
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.DeleteMapping;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.PutMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import com.example.demo.dto.RecipeDto;
+import com.example.demo.entity.Recipe;
+import com.example.demo.entity.User;
+import com.example.demo.service.RecipeService;
+
+@RestController
+@RequestMapping("/api/recipes")
+public class RecipeController {
+	
+	private RecipeService recipeService;
+
+	public RecipeController(RecipeService recipeService) {
+		super();
+		this.recipeService = recipeService;
+	}
+	
+	//build create recipe REST API
+	@PostMapping
+	public ResponseEntity<RecipeDto> saveUser(@RequestBody Recipe recipe){		
+		RecipeDto recipeDto = recipeService.convertToDto(recipe);
+		return new ResponseEntity<RecipeDto>(recipeService.saveRecipe(recipeDto), HttpStatus.CREATED);
+	}
+		
+	//build get all recipes REST API
+	@GetMapping
+	public List<RecipeDto> getAllRecipes(){
+		return recipeService.getAllRecipes();
+	}
+		
+	//build get recipe by id REST API
+	// http://localhost:8080/api/recipes/(id number goes here)
+	@GetMapping("{id}")
+	public ResponseEntity<RecipeDto> getRecipeById(@PathVariable("id") Integer recipeId){
+		return new ResponseEntity<RecipeDto>(recipeService.getRecipeById(recipeId), HttpStatus.OK);
+	}
+	
+	//build update recipe REST API
+	//http://localhost:8080/api/recipes/(id number goes here)
+	@PutMapping("{id}")
+	public ResponseEntity<RecipeDto> updateUser(@PathVariable("id") Integer recipeId, @RequestBody Recipe recipe){
+		RecipeDto recipeDto = recipeService.convertToDto(recipe);
+		return new ResponseEntity<RecipeDto>(recipeService.updateRecipe(recipeDto, recipeId), HttpStatus.OK);
+	}
+	
+	//build delete recipe REST API
+	//http://localhost:8080/api/recipes/(id number goes here)
+	@DeleteMapping("{id}")
+	public ResponseEntity<String> deleteUser(@PathVariable("id") Integer recipeId){
+		recipeService.deleteRecipe(recipeId);
+		return new ResponseEntity<String>("Recipe deleted succesfully!", HttpStatus.OK);
+	}
+		
+		
+		
 }

demo/src/main/java/com/example/demo/dto/RecipeDto.java

@@ -0,0 +1,88 @@
+package com.example.demo.dto;
+
+import java.util.List;
+
+import com.example.demo.entity.Recipe;
+
+public class RecipeDto {
+    private String title;
+    private String description;
+    private Integer prepTimeMinutes;
+    private Integer cookTimeMinutes;
+    private Integer servings;
+    private Integer userId;
+    private String status;
+    private List<RecipeIngredientDto> ingredients;
+    
+    
+    
+    
+    public RecipeDto() {
+		super();
+	}
+
+	public RecipeDto(String title, String description, Integer prepTimeMinutes, Integer cookTimeMinutes,
+			Integer servings, Integer userId, String status, List<RecipeIngredientDto> ingredients) {
+		super();
+		this.title = title;
+		this.description = description;
+		this.prepTimeMinutes = prepTimeMinutes;
+		this.cookTimeMinutes = cookTimeMinutes;
+		this.servings = servings;
+		this.userId = userId;
+		this.status = status;
+		this.ingredients = ingredients;
+	}
+    
+	// getters and setters
+    
+	public String getTitle() {
+		return title;
+	}
+	public void setTitle(String title) {
+		this.title = title;
+	}
+	public String getDescription() {
+		return description;
+	}
+	public void setDescription(String description) {
+		this.description = description;
+	}
+	public Integer getPrepTimeMinutes() {
+		return prepTimeMinutes;
+	}
+	public void setPrepTimeMinutes(Integer prepTimeMinutes) {
+		this.prepTimeMinutes = prepTimeMinutes;
+	}
+	public Integer getCookTimeMinutes() {
+		return cookTimeMinutes;
+	}
+	public void setCookTimeMinutes(Integer cookTimeMinutes) {
+		this.cookTimeMinutes = cookTimeMinutes;
+	}
+	public Integer getServings() {
+		return servings;
+	}
+	public void setServings(Integer servings) {
+		this.servings = servings;
+	}
+	public Integer getUserId() {
+		return userId;
+	}
+	public void setUserId(Integer userId) {
+		this.userId = userId;
+	}
+	public String getStatus() {
+		return status;
+	}
+	public void setStatus(String status) {
+		this.status = status;
+	}
+	public List<RecipeIngredientDto> getIngredients() {
+		return ingredients;
+	}
+	public void setIngredients(List<RecipeIngredientDto> ingredients) {
+		this.ingredients = ingredients;
+	}
+    
+}

demo/src/main/java/com/example/demo/dto/RecipeIngredientDto.java

@@ -0,0 +1,53 @@
+package com.example.demo.dto;
+
+import java.math.BigDecimal;
+
+public class RecipeIngredientDto {
+    private String ingredientName;
+    private BigDecimal quantity;
+    private String unit;
+    private String notes;
+    
+    
+    
+
+    
+    public RecipeIngredientDto() {
+    	super();
+    }
+
+	public RecipeIngredientDto(String ingredientName, BigDecimal quantity, String unit, String notes) {
+		super();
+		this.ingredientName = ingredientName;
+		this.quantity = quantity;
+		this.unit = unit;
+		this.notes = notes;
+	}
+	
+    // getters and setters
+	public String getIngredientName() {
+		return ingredientName;
+	}
+	public void setIngredientName(String ingredientName) {
+		this.ingredientName = ingredientName;
+	}
+	public BigDecimal getQuantity() {
+		return quantity;
+	}
+	public void setQuantity(BigDecimal quantity) {
+		this.quantity = quantity;
+	}
+	public String getUnit() {
+		return unit;
+	}
+	public void setUnit(String unit) {
+		this.unit = unit;
+	}
+	public String getNotes() {
+		return notes;
+	}
+	public void setNotes(String notes) {
+		this.notes = notes;
+	}
+    
+}

demo/src/main/java/com/example/demo/entity/Ingredient.java

@@ -1,11 +1,18 @@
 package com.example.demo.entity;
 
 import jakarta.persistence.Entity;
+import jakarta.persistence.FetchType;
 import jakarta.persistence.Table;
 import jakarta.persistence.UniqueConstraint;
 import jakarta.persistence.Id;
+import jakarta.persistence.OneToMany;
 import jakarta.persistence.GeneratedValue;
 import jakarta.persistence.GenerationType;
+
+import java.util.HashSet;
+import java.util.Set;
+
+import jakarta.persistence.CascadeType;
 import jakarta.persistence.Column;
 
 @Entity
@@ -17,11 +24,15 @@ public class Ingredient {
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
     private Integer id;
+    
 
     @Column(nullable = false, unique = true)
     private String name;
+    
+    @OneToMany(mappedBy = "ingredient")
+    private Set<RecipeIngredient> recipeIngredients = new HashSet<>();
 
-    // Default constructor required by JPA
+	// Default constructor required by JPA
     public Ingredient() {}
 
     // Convenience constructor
@@ -35,4 +46,12 @@ public class Ingredient {
 
     public String getName() { return name; }
     public void setName(String name) { this.name = name; }
+    
+    public Set<RecipeIngredient> getRecipeIngredients() {
+		return recipeIngredients;
+	}
+
+	public void setRecipeIngredients(Set<RecipeIngredient> recipeIngredients) {
+		this.recipeIngredients = recipeIngredients;
+	}
 }

demo/src/main/java/com/example/demo/entity/Recipe.java

@@ -1,12 +1,10 @@
 package com.example.demo.entity;
 
-import jakarta.persistence.Entity;
+import jakarta.persistence.*;
-import jakarta.persistence.Table;
+import java.math.BigDecimal;
-import jakarta.persistence.Id;
-import jakarta.persistence.GeneratedValue;
-import jakarta.persistence.GenerationType;
-import jakarta.persistence.Column;
 import java.time.LocalDateTime;
+import java.util.HashSet;
+import java.util.Set;
 
 @Entity
 @Table(name = "recipes")
@@ -33,7 +31,12 @@ public class Recipe {
     private LocalDateTime createdAt;
     private LocalDateTime updatedAt;
 
-    // Default constructor required by JPA
+    // Recipe ingredients relationship
+    @OneToMany(mappedBy = "recipe", cascade = CascadeType.ALL, orphanRemoval = true, fetch = FetchType.LAZY)
+    private Set<RecipeIngredient> recipeIngredients = new HashSet<>();
+
+
+    // Default constructor
     public Recipe() {}
 
     // Convenience constructor
@@ -50,7 +53,32 @@ public class Recipe {
         this.updatedAt = LocalDateTime.now();
     }
 
-    // Getters and setters for all fields
+    // Helper method to add an ingredient
+    public void addIngredient(Ingredient ingredient, BigDecimal quantity, String unit, String notes) {
+        RecipeIngredient recipeIngredient = new RecipeIngredient(this, ingredient, quantity, unit, notes);
+        recipeIngredients.add(recipeIngredient);
+        ingredient.getRecipeIngredients().add(recipeIngredient);
+    }
+    
+    public void removeIngredient(Ingredient ingredient) {
+        RecipeIngredient remove = null;
+        for (RecipeIngredient recipeIngredient : recipeIngredients) {
+            if (recipeIngredient.getIngredient().equals(ingredient)) {
+                remove = recipeIngredient;
+                break;
+            }
+        }
+        
+        if (remove != null) {
+            recipeIngredients.remove(remove);
+            ingredient.getRecipeIngredients().remove(remove);
+            remove.setRecipe(null);
+            remove.setIngredient(null);
+        }
+    }
+
+
+    // Getters and setters
     public Integer getId() { return id; }
     public void setId(Integer id) { this.id = id; }
 
@@ -81,4 +109,7 @@ public class Recipe {
     public LocalDateTime getUpdatedAt() { return updatedAt; }
     public void setUpdatedAt(LocalDateTime updatedAt) { this.updatedAt = updatedAt; }
 
+    public Set<RecipeIngredient> getRecipeIngredients() { return recipeIngredients; }
+    public void setRecipeIngredients(Set<RecipeIngredient> recipeIngredients) { this.recipeIngredients = recipeIngredients; }
+
 }

demo/src/main/java/com/example/demo/entity/RecipeIngredient.java

@@ -2,22 +2,28 @@ package com.example.demo.entity;
 
 import jakarta.persistence.*;
 import java.math.BigDecimal;
+import lombok.EqualsAndHashCode;
 
 @Entity
 @Table(name = "recipe_ingredient_junction", 
        uniqueConstraints = {@UniqueConstraint(columnNames = {"recipe_id", "ingredient_id"})})
+@EqualsAndHashCode(
+	    onlyExplicitlyIncluded = true
+	)
 public class RecipeIngredient {
 
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
-    private Integer id;  // surrogate PK
+    private Integer id; 
 
-    @ManyToOne
+    @ManyToOne(fetch = FetchType.LAZY)
     @JoinColumn(name = "recipe_id", nullable = false)
+    @EqualsAndHashCode.Include
     private Recipe recipe;
 
-    @ManyToOne
+    @ManyToOne(fetch = FetchType.LAZY)
     @JoinColumn(name = "ingredient_id", nullable = false)
+    @EqualsAndHashCode.Include
     private Ingredient ingredient;
 
     private BigDecimal quantity;

demo/src/main/java/com/example/demo/repository/IngredientRepo.java

@@ -1,9 +1,11 @@
 package com.example.demo.repository;
 
+import java.util.Optional;
+
 import org.springframework.data.jpa.repository.JpaRepository;
 import com.example.demo.entity.Ingredient;
 
 
 public interface IngredientRepo extends JpaRepository<Ingredient, Integer> {
-   
+	Optional<Ingredient> findByName(String name);
 }

demo/src/main/java/com/example/demo/repository/RecipeIngredientRepo.java

@@ -1,9 +1,11 @@
 package com.example.demo.repository;
 
 import org.springframework.data.jpa.repository.JpaRepository;
+
+import com.example.demo.entity.Recipe;
 import com.example.demo.entity.RecipeIngredient;
 
 public interface RecipeIngredientRepo extends JpaRepository<RecipeIngredient, Integer> {
     // Custom query: find all ingredients for a recipe
-
+	void deleteByRecipe(Recipe recipe);
 }

demo/src/main/java/com/example/demo/repository/RecipeRepo.java

@@ -5,4 +5,5 @@ import com.example.demo.entity.Recipe;
 
 
 public interface RecipeRepo extends JpaRepository<Recipe, Integer> {
+
 }

demo/src/main/java/com/example/demo/service/Impl/RecipeServiceImpl.java

@@ -0,0 +1,208 @@
+package com.example.demo.service.Impl;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.springframework.stereotype.Service;
+
+import com.example.demo.dto.RecipeDto;
+import com.example.demo.dto.RecipeIngredientDto;
+import com.example.demo.entity.Ingredient;
+import com.example.demo.entity.Recipe;
+import com.example.demo.entity.RecipeIngredient;
+import com.example.demo.entity.User;
+import com.example.demo.exception.NotFoundException;
+import com.example.demo.repository.IngredientRepo;
+import com.example.demo.repository.RecipeIngredientRepo;
+import com.example.demo.repository.RecipeRepo;
+import com.example.demo.service.RecipeService;
+
+import jakarta.transaction.Transactional;
+
+@Service
+public class RecipeServiceImpl implements RecipeService{
+	
+private RecipeRepo recipeRepository;
+private IngredientRepo ingredientRepository;
+private RecipeIngredientRepo recipeIngredientRepository;
+	
+	public RecipeServiceImpl(RecipeRepo recipeRepository, IngredientRepo ingredientRepository, RecipeIngredientRepo recipeIngredientRepository) {
+		super();
+		this.recipeRepository = recipeRepository;
+		this.ingredientRepository = ingredientRepository;
+		this.recipeIngredientRepository = recipeIngredientRepository;
+	}
+	
+	public RecipeDto convertToDto(Recipe recipe) {
+	    List<RecipeIngredientDto> ingredientDtos = recipe.getRecipeIngredients().stream()
+	        .map(ri -> new RecipeIngredientDto(
+	                ri.getIngredient().getName(),
+	                ri.getQuantity(),
+	                ri.getUnit(),
+	                ri.getNotes()
+	        ))
+	        .toList();
+
+	    return new RecipeDto(
+	        recipe.getTitle(),
+	        recipe.getDescription(),
+	        recipe.getPrepTimeMinutes(),
+	        recipe.getCookTimeMinutes(),
+	        recipe.getServings(),
+	        recipe.getUserId(),
+	        recipe.getStatus(),
+	        ingredientDtos
+	    );
+	}
+
+	@Override
+    public RecipeDto saveRecipe(RecipeDto dto) {
+
+        Recipe recipe = new Recipe(
+                dto.getTitle(),
+                dto.getDescription(),
+                dto.getPrepTimeMinutes(),
+                dto.getCookTimeMinutes(),
+                dto.getServings(),
+                dto.getUserId(),
+                dto.getStatus()
+        );
+
+       
+        for (RecipeIngredientDto riDto : dto.getIngredients()) {
+
+            
+            Ingredient ingredient = ingredientRepository.findByName(riDto.getIngredientName())
+                    .orElseGet(() -> new Ingredient(riDto.getIngredientName()));
+
+            
+            if (ingredient.getId() == null) {
+                ingredientRepository.save(ingredient);
+            }
+
+            RecipeIngredient ri = new RecipeIngredient(
+                    recipe,
+                    ingredient,
+                    riDto.getQuantity(),
+                    riDto.getUnit(),
+                    riDto.getNotes()
+            );
+
+            recipe.getRecipeIngredients().add(ri);
+        }
+        recipeRepository.save(recipe);
+        
+        return dto;
+        		
+
+    }
+
+	@Override
+	@Transactional
+	public List<RecipeDto> getAllRecipes() {
+		 
+		List<RecipeDto> list = new ArrayList<>();
+		 for (Recipe recipe : recipeRepository.findAll()) {
+			 RecipeDto recipeDto = convertToDto(recipe);
+			 list.add(recipeDto);
+		 }
+		 
+		 return list;
+	}
+
+	@Override
+	@Transactional
+	public RecipeDto getRecipeById(Integer Id) {
+		return convertToDto(recipeRepository.findById(Id).orElseThrow(() -> 
+		new NotFoundException("Recipe", "id", Id)));
+	}
+
+	@Override
+	@Transactional
+	public RecipeDto updateRecipe(RecipeDto recipeDto, Integer id) {
+	    Recipe existingRecipe = recipeRepository.findById(id)
+	        .orElseThrow(() -> new NotFoundException("Recipe", "id", id));
+
+	    existingRecipe.setTitle(recipeDto.getTitle());
+	    existingRecipe.setDescription(recipeDto.getDescription());
+	    existingRecipe.setPrepTimeMinutes(recipeDto.getPrepTimeMinutes());
+	    existingRecipe.setCookTimeMinutes(recipeDto.getCookTimeMinutes());
+	    existingRecipe.setServings(recipeDto.getServings());
+	    existingRecipe.setStatus(recipeDto.getStatus());
+	    
+
+	    List<RecipeIngredientDto> updatedIngredients = recipeDto.getIngredients();
+	    List<RecipeIngredient> ingredientsToRemove = new ArrayList<>();
+
+	    for (RecipeIngredient ri : existingRecipe.getRecipeIngredients()) {
+
+	        boolean existsInUpdatedList = false;
+	        for (RecipeIngredientDto dto : updatedIngredients) {
+	            String updatedName = dto.getIngredientName();
+	            String existingName = ri.getIngredient().getName();
+
+	            if (updatedName.equals(existingName)) {
+	                existsInUpdatedList = true;
+	                break;
+	            }
+	        }
+
+	        if (!existsInUpdatedList) {
+	            ingredientsToRemove.add(ri);
+	        }
+	    }
+	    
+	    existingRecipe.getRecipeIngredients().removeAll(ingredientsToRemove);	    
+
+	    for (RecipeIngredientDto riDto : updatedIngredients) {
+	        
+	    	// go through the old list of ingredients until we find a match with updated list
+	        RecipeIngredient existingRI = existingRecipe.getRecipeIngredients().stream()
+	            .filter(ri -> ri.getIngredient().getName().equals(riDto.getIngredientName()))
+	            .findFirst()
+	            .orElse(null);
+	        
+	        
+	        // if old ingredient just update parameters
+	        if (existingRI != null) {
+	            
+	            existingRI.setQuantity(riDto.getQuantity());
+	            existingRI.setUnit(riDto.getUnit());
+	            existingRI.setNotes(riDto.getNotes());
+	        } 
+	        
+	        // if new ingredient, have to make a whole new thing
+	        else {
+	            
+	            Ingredient ingredient = ingredientRepository.findByName(riDto.getIngredientName())
+	                .orElseGet(() -> new Ingredient(riDto.getIngredientName()));
+
+	            if (ingredient.getId() == null) {
+	                ingredientRepository.save(ingredient);
+	            }
+
+	            RecipeIngredient newRI = new RecipeIngredient(
+	                existingRecipe,
+	                ingredient,
+	                riDto.getQuantity(),
+	                riDto.getUnit(),
+	                riDto.getNotes()
+	            );
+
+	            existingRecipe.getRecipeIngredients().add(newRI);
+	        }
+	    }
+
+	    
+	    recipeRepository.save(existingRecipe);
+	    return convertToDto(existingRecipe);
+	}
+
+	@Override
+	public void deleteRecipe(Integer Id) {
+		recipeRepository.findById(Id)
+		        .orElseThrow(() -> new NotFoundException("Recipe", "id", Id));
+		recipeRepository.deleteById(Id);
+		
+	}
+}

demo/src/main/java/com/example/demo/service/MapperService.java

@@ -0,0 +1,5 @@
+package com.example.demo.service;
+
+public class MapperService {
+
+}

demo/src/main/java/com/example/demo/service/RecipeService.java

@@ -1,5 +1,19 @@
 package com.example.demo.service;
 
-public interface RecipeService {
+import java.util.List;
 
+import org.jspecify.annotations.Nullable;
+
+import com.example.demo.dto.RecipeDto;
+import com.example.demo.entity.Recipe;
+import com.example.demo.entity.User;
+
+public interface RecipeService {
+	RecipeDto convertToDto(Recipe recipe) ;
+	RecipeDto saveRecipe(RecipeDto recipe);
+	List<RecipeDto> getAllRecipes();
+	RecipeDto getRecipeById(Integer recipeId);
+	RecipeDto updateRecipe(RecipeDto recipedto, Integer Id);
+	void deleteRecipe(Integer Id);
+	
 }