gruppen und likes

src/main/java/com/example/hangry/Group.java

@@ -0,0 +1,77 @@
+package com.example.hangry;
+
+import jakarta.persistence.*;
+import java.util.HashSet;
+import java.util.Set;
+
+@Entity
+@Table(name = "`group`")
+public class Group {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    private String name;
+    private String description;
+
+    @ManyToMany
+    @JoinTable(
+            name = "group_users",
+            joinColumns = @JoinColumn(name = "group_id"),
+            inverseJoinColumns = @JoinColumn(name = "user_id")
+    )
+    private Set<User> members = new HashSet<>();
+
+    @OneToMany(mappedBy = "group", cascade = CascadeType.ALL, orphanRemoval = true)
+    private Set<GroupRecipe> sharedRecipes = new HashSet<>();
+
+    public Group() {}
+
+    public Group(String name, String description) {
+        this.name = name;
+        this.description = description;
+    }
+
+    // Getter und Setter
+
+    public Long getId() {
+        return id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    public Set<User> getMembers() {
+        return members;
+    }
+
+    public Set<GroupRecipe> getSharedRecipes() {
+        return sharedRecipes;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public void setDescription(String description) {
+        this.description = description;
+    }
+
+    public void setMembers(Set<User> members) {
+        this.members = members;
+    }
+
+    public void setSharedRecipes(Set<GroupRecipe> sharedRecipes) {
+        this.sharedRecipes = sharedRecipes;
+    }
+}

src/main/java/com/example/hangry/GroupController.java

@@ -0,0 +1,43 @@
+package com.example.hangry;
+
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+import java.util.Set;
+
+@RestController
+@RequestMapping("/api/groups")
+@CrossOrigin(origins = "*")
+public class GroupController {
+
+    private final GroupService groupService;
+
+    public GroupController(GroupService groupService) {
+        this.groupService = groupService;
+    }
+
+    // Neue Gruppe erstellen
+    @PostMapping
+    public ResponseEntity<Group> createGroup(@RequestParam String name, @RequestParam String description) {
+        return ResponseEntity.ok(groupService.createGroup(name, description));
+    }
+
+    // Gruppe beitreten
+    @PostMapping("/{groupId}/join/{userId}")
+    public ResponseEntity<String> joinGroup(@PathVariable Long groupId, @PathVariable Long userId) {
+        boolean joined = groupService.joinGroup(userId, groupId);
+        return joined ? ResponseEntity.ok("Gruppe beigetreten") : ResponseEntity.badRequest().body("Bereits Mitglied");
+    }
+
+    // Gruppe verlassen
+    @PostMapping("/{groupId}/leave/{userId}")
+    public ResponseEntity<String> leaveGroup(@PathVariable Long groupId, @PathVariable Long userId) {
+        boolean left = groupService.leaveGroup(userId, groupId);
+        return left ? ResponseEntity.ok("Gruppe verlassen") : ResponseEntity.badRequest().body("Nicht in der Gruppe");
+    }
+
+    // Mitglieder einer Gruppe abrufen
+    @GetMapping("/{groupId}/members")
+    public ResponseEntity<Set<User>> getGroupMembers(@PathVariable Long groupId) {
+        return ResponseEntity.ok(groupService.getGroupMembers(groupId));
+    }
+}

src/main/java/com/example/hangry/GroupRecipe.java

@@ -0,0 +1,52 @@
+package com.example.hangry;
+
+import jakarta.persistence.*;
+
+@Entity
+public class GroupRecipe {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @ManyToOne
+    @JoinColumn(name = "group_id", nullable = false)
+    private Group group;
+
+    @ManyToOne
+    @JoinColumn(name = "recipe_id", nullable = false)
+    private Recipe recipe;
+
+    public GroupRecipe() {}
+
+    public GroupRecipe(Group group, Recipe recipe) {
+        this.group = group;
+        this.recipe = recipe;
+    }
+
+    // Getter und Setter
+
+    public Long getId() {
+        return id;
+    }
+
+    public Group getGroup() {
+        return group;
+    }
+
+    public Recipe getRecipe() {
+        return recipe;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public void setGroup(Group group) {
+        this.group = group;
+    }
+
+    public void setRecipe(Recipe recipe) {
+        this.recipe = recipe;
+    }
+}

src/main/java/com/example/hangry/GroupRecipeController.java

@@ -0,0 +1,32 @@
+package com.example.hangry;
+
+
+
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.Set;
+
+
+@RestController
+@RequestMapping("/api/group-recipes")
+@CrossOrigin(origins = "*")
+public class GroupRecipeController {
+
+    private final GroupRecipeService groupRecipeService;
+
+    public GroupRecipeController(GroupRecipeService groupRecipeService) {
+        this.groupRecipeService = groupRecipeService;
+    }
+
+    @PostMapping("/{groupId}/share/{recipeId}")
+    public ResponseEntity<String> shareRecipe(@PathVariable Long groupId, @PathVariable Long recipeId) {
+        boolean shared = groupRecipeService.shareRecipeWithGroup(groupId, recipeId);
+        return shared ? ResponseEntity.ok("Rezept geteilt") : ResponseEntity.badRequest().body("Fehler beim Teilen");
+    }
+
+    @GetMapping("/{groupId}")
+    public ResponseEntity<Set<Recipe>> getGroupRecipes(@PathVariable Long groupId) {
+        return ResponseEntity.ok(groupRecipeService.getGroupRecipes(groupId));
+    }
+}

src/main/java/com/example/hangry/GroupRecipeRepository.java

@@ -0,0 +1,6 @@
+package com.example.hangry;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface GroupRecipeRepository extends JpaRepository<GroupRecipe, Long> {
+}

src/main/java/com/example/hangry/GroupRecipeService.java

@@ -0,0 +1,38 @@
+package com.example.hangry;
+
+import org.springframework.stereotype.Service;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+@Service
+public class GroupRecipeService {
+
+    private final GroupRepository groupRepository;
+    private final RecipeRepository recipeRepository;
+    private final GroupRecipeRepository groupRecipeRepository;
+
+    public GroupRecipeService(GroupRepository groupRepository, RecipeRepository recipeRepository, GroupRecipeRepository groupRecipeRepository) {
+        this.groupRepository = groupRepository;
+        this.recipeRepository = recipeRepository;
+        this.groupRecipeRepository = groupRecipeRepository;
+    }
+
+    // Rezept mit Gruppe teilen
+    public boolean shareRecipeWithGroup(Long groupId, Long recipeId) {
+        Group group = groupRepository.findById(groupId)
+                .orElseThrow(() -> new RuntimeException("Gruppe nicht gefunden"));
+        Recipe recipe = recipeRepository.findById(recipeId)
+                .orElseThrow(() -> new RuntimeException("Rezept nicht gefunden"));
+
+        GroupRecipe groupRecipe = new GroupRecipe(group, recipe);
+        groupRecipeRepository.save(groupRecipe);
+        return true;
+    }
+
+    // Alle Rezepte einer Gruppe abrufen
+    public Set<Recipe> getGroupRecipes(Long groupId) {
+        Group group = groupRepository.findById(groupId)
+                .orElseThrow(() -> new RuntimeException("Gruppe nicht gefunden"));
+        return group.getSharedRecipes().stream().map(GroupRecipe::getRecipe).collect(Collectors.toSet());
+    }
+}

src/main/java/com/example/hangry/GroupRepository.java

@@ -0,0 +1,6 @@
+package com.example.hangry;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface GroupRepository extends JpaRepository<Group, Long> {
+}

src/main/java/com/example/hangry/GroupService.java

@@ -0,0 +1,60 @@
+package com.example.hangry;
+
+import org.springframework.stereotype.Service;
+import java.util.Optional;
+import java.util.Set;
+
+@Service
+public class GroupService {
+
+    private final GroupRepository groupRepository;
+    private final UserRepository userRepository;
+
+    public GroupService(GroupRepository groupRepository, UserRepository userRepository) {
+        this.groupRepository = groupRepository;
+        this.userRepository = userRepository;
+    }
+
+    // Gruppe erstellen
+    public Group createGroup(String name, String description) {
+        Group group = new Group(name, description);
+        return groupRepository.save(group);
+    }
+
+    // Gruppe beitreten
+    public boolean joinGroup(Long userId, Long groupId) {
+        User user = userRepository.findById(userId)
+                .orElseThrow(() -> new RuntimeException("User nicht gefunden"));
+        Group group = groupRepository.findById(groupId)
+                .orElseThrow(() -> new RuntimeException("Gruppe nicht gefunden"));
+
+        if (!group.getMembers().contains(user)) {
+            group.getMembers().add(user);
+            groupRepository.save(group);
+            return true;
+        }
+        return false;
+    }
+
+    // Gruppe verlassen
+    public boolean leaveGroup(Long userId, Long groupId) {
+        User user = userRepository.findById(userId)
+                .orElseThrow(() -> new RuntimeException("User nicht gefunden"));
+        Group group = groupRepository.findById(groupId)
+                .orElseThrow(() -> new RuntimeException("Gruppe nicht gefunden"));
+
+        if (group.getMembers().contains(user)) {
+            group.getMembers().remove(user);
+            groupRepository.save(group);
+            return true;
+        }
+        return false;
+    }
+
+    // Alle Mitglieder einer Gruppe abrufen
+    public Set<User> getGroupMembers(Long groupId) {
+        Group group = groupRepository.findById(groupId)
+                .orElseThrow(() -> new RuntimeException("Gruppe nicht gefunden"));
+        return group.getMembers();
+    }
+}

src/main/java/com/example/hangry/Like.java

@@ -0,0 +1,64 @@
+package com.example.hangry;
+import jakarta.persistence.*;
+import java.time.LocalDateTime;
+
+
+@Entity
+@Table(name = "`like`")
+public class Like {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @ManyToOne
+    @JoinColumn(name = "user_id", nullable = false)
+    private User user;
+
+    @ManyToOne
+    @JoinColumn(name = "recipe_id", nullable = false)
+    private Recipe recipe;
+
+    private LocalDateTime createdAt = LocalDateTime.now();
+
+    // Konstruktoren, Getter & Setter#
+
+    public Like(){}
+    public Like( User user, Recipe recipe) {
+        this.user = user;
+        this.recipe = recipe;
+        this.createdAt=LocalDateTime.now();
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public User getUser() {
+        return user;
+    }
+
+    public Recipe getRecipe() {
+        return recipe;
+    }
+
+    public LocalDateTime getCreatedAt() {
+        return createdAt;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public void setUser(User user) {
+        this.user = user;
+    }
+
+    public void setRecipe(Recipe recipe) {
+        this.recipe = recipe;
+    }
+
+    public void setCreatedAt(LocalDateTime createdAt) {
+        this.createdAt = createdAt;
+    }
+}
+

src/main/java/com/example/hangry/LikeController.java

@@ -0,0 +1,44 @@
+package com.example.hangry;
+
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+import java.util.List;
+
+@RestController
+@RequestMapping("/api/likes")
+@CrossOrigin(origins = "*")
+public class LikeController {
+
+    private final LikeService likeService;
+
+    public LikeController(LikeService likeService) {
+        this.likeService = likeService;
+    }
+
+    // Rezept liken
+    @PostMapping("/{userId}/{recipeId}")
+    public ResponseEntity<String> likeRecipe(@PathVariable Long userId, @PathVariable Long recipeId) {
+        boolean liked = likeService.likeRecipe(userId, recipeId);
+        return liked ? ResponseEntity.ok("Rezept geliked") : ResponseEntity.badRequest().body("Bereits geliked");
+    }
+
+    // Rezept entliken
+    @DeleteMapping("/{userId}/{recipeId}")
+    public ResponseEntity<String> unlikeRecipe(@PathVariable Long userId, @PathVariable Long recipeId) {
+        boolean unliked = likeService.unlikeRecipe(userId, recipeId);
+        return unliked ? ResponseEntity.ok("Like entfernt") : ResponseEntity.badRequest().body("Like existiert nicht");
+    }
+
+    // Anzahl der Likes für ein Rezept abrufen
+    @GetMapping("/count/{recipeId}")
+    public ResponseEntity<Long> getLikeCount(@PathVariable Long recipeId) {
+        return ResponseEntity.ok(likeService.getLikeCount(recipeId));
+    }
+
+    // Alle geliketen Rezepte eines Users abrufen
+    @GetMapping("/user/{userId}")
+    public ResponseEntity<List<Recipe>> getLikedRecipes(@PathVariable Long userId) {
+        return ResponseEntity.ok(likeService.getLikedRecipes(userId));
+    }
+}
+

src/main/java/com/example/hangry/LikeRepository.java

@@ -0,0 +1,17 @@
+package com.example.hangry;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import java.util.List;
+import java.util.Optional;
+
+public interface LikeRepository extends JpaRepository<Like, Long> {
+    boolean existsByUserAndRecipe(User user, Recipe recipe);
+
+    long countByRecipe(Recipe recipe);
+
+    List<Like> findAllByUser(User user);
+
+    void deleteByUserAndRecipe(User user, Recipe recipe);
+
+}
+

src/main/java/com/example/hangry/LikeService.java

@@ -0,0 +1,66 @@
+package com.example.hangry;
+
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+import java.util.List;
+
+@Service
+public class LikeService {
+
+    private final LikeRepository likeRepository;
+    private final RecipeRepository recipeRepository;
+    private final UserRepository userRepository;
+
+    public LikeService(LikeRepository likeRepository, RecipeRepository recipeRepository, UserRepository userRepository) {
+        this.likeRepository = likeRepository;
+        this.recipeRepository = recipeRepository;
+        this.userRepository = userRepository;
+    }
+
+    // Rezept liken
+    public boolean likeRecipe(Long userId, Long recipeId) {
+        User user = userRepository.findById(userId).orElseThrow();
+        Recipe recipe = recipeRepository.findById(recipeId).orElseThrow();
+
+        if (likeRepository.existsByUserAndRecipe(user, recipe)) {
+            return false; // Bereits geliked
+        }
+
+        Like like = new Like();
+        like.setUser(user);
+        like.setRecipe(recipe);
+        likeRepository.save(like);
+        return true;
+    }
+
+    // Rezept entliken
+    @Transactional
+    public boolean unlikeRecipe(Long userId, Long recipeId) {
+        User user = userRepository.findById(userId)
+                .orElseThrow(() -> new RuntimeException("User nicht gefunden"));
+        Recipe recipe = recipeRepository.findById(recipeId)
+                .orElseThrow(() -> new RuntimeException("Rezept nicht gefunden"));
+
+        // Prüfen, ob das Like existiert
+        if (!likeRepository.existsByUserAndRecipe(user, recipe)) {
+            return false; // Like existiert nicht
+        }
+
+        likeRepository.deleteByUserAndRecipe(user, recipe);
+        return true;
+    }
+
+
+    // Anzahl der Likes für ein Rezept abrufen
+    public long getLikeCount(Long recipeId) {
+        Recipe recipe = recipeRepository.findById(recipeId).orElseThrow();
+        return likeRepository.countByRecipe(recipe);
+    }
+
+    // Alle geliketen Rezepte eines Users abrufen
+    public List<Recipe> getLikedRecipes(Long userId) {
+        User user = userRepository.findById(userId).orElseThrow();
+        List<Like> likes = likeRepository.findAllByUser(user);
+        return likes.stream().map(Like::getRecipe).toList();
+    }
+}

src/main/java/com/example/hangry/Recipe.java

@@ -76,4 +76,6 @@ public class Recipe {
     public void setRecipeIngredients(List<RecipeIngredient> recipeIngredients) {
         this.recipeIngredients = recipeIngredients;
     }
+
+
 }