search

BE/src/main/java/org/example/controllers/CategoryController.java

@@ -0,0 +1,25 @@
+package org.example.controllers;
+
+
+import org.example.models.Category;
+import org.example.services.CategoryService;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.List;
+
+@RestController
+@RequestMapping("/category")
+public class CategoryController {
+    private final CategoryService categoryService;
+
+    public CategoryController(CategoryService categoryService) {
+        this.categoryService = categoryService;
+    }
+
+    @GetMapping("/getAllCategories")
+    public List<Category> getAllCategories(){
+        return categoryService.getAllCategories();
+    }
+}

BE/src/main/java/org/example/controllers/InteractionController.java

@@ -0,0 +1,39 @@
+package org.example.controllers;
+
+import org.example.objects.CommentDTO;
+import org.example.objects.InteractionsDTO;
+import org.example.services.InteractService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+@RestController
+@RequestMapping("/interactions")
+public class InteractionController {
+    private final InteractService interactionService;
+
+    @Autowired
+    public InteractionController(InteractService interactionService) {
+        this.interactionService = interactionService;
+    }
+
+    @PostMapping("/like")
+    public ResponseEntity<Void> likePost(@RequestBody InteractionsDTO interactionsDTO) {
+        interactionService.toggleLike(interactionsDTO.getUsername(), interactionsDTO.getPostId());
+        return new ResponseEntity<>(HttpStatus.OK);
+    }
+
+    @PostMapping("/comment")
+    public ResponseEntity<Void> commentPost(@RequestBody CommentDTO interactionsDTO) {
+        interactionService.commentPost(interactionsDTO.getUsername(), interactionsDTO.getPostId(), interactionsDTO.getContent());
+        return new ResponseEntity<>(HttpStatus.OK);
+    }
+
+    @PostMapping("/share")
+    public ResponseEntity<Void> sharePost(@RequestBody InteractionsDTO interactionsDTO) {
+        interactionService.sharePost(interactionsDTO.getUsername(), interactionsDTO.getPostId());
+        return new ResponseEntity<>(HttpStatus.OK);
+    }
+}
+

BE/src/main/java/org/example/controllers/PostController.java

@@ -1,14 +1,15 @@
 package org.example.controllers;
 
 //import org.example.models.Author;
-import org.example.models.Image;
+import org.example.models.*;
-import org.example.models.LikeRequest;
-import org.example.models.Post;
-import org.example.models.User;
 import org.example.objects.PostDTO;
+import org.example.objects.PostWithMedia;
+import org.example.repositories.CategoryRepository;
 import org.example.repositories.PostRepository;
 import org.example.services.PostService;
+import org.example.services.RecommendationService;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.data.repository.query.Param;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.*;
@@ -23,11 +24,15 @@ public class PostController {
 
     private final PostService postService;
     private final PostRepository postRepository;
+    private final RecommendationService recommendationService;
+    private final CategoryRepository categoryRepository;
 
     @Autowired
-    public PostController(PostService postService, PostRepository postRepository) {
+    public PostController(PostService postService, PostRepository postRepository, RecommendationService recommendationService, CategoryRepository categoryRepository) {
         this.postService = postService;
         this.postRepository = postRepository;
+        this.recommendationService = recommendationService;
+        this.categoryRepository = categoryRepository;
     }
 
     @GetMapping("/getAllPosts")
@@ -42,29 +47,23 @@ public class PostController {
 
     @PostMapping("/edit/{id}")
     public Post updatePost(@PathVariable Long id,@RequestBody PostDTO postDTO) throws IOException {
-        return postService.editPost(id, postDTO.getTitle(), postDTO.getContent(), postDTO.getImageFile(), postDTO.getVideoFile());
+        return postService.editPost(id, postDTO.getTitle(), postDTO.getContent(),postDTO.getCategory(), postDTO.getImageFile(), postDTO.getVideoFile());
-    }
-    @PostMapping("/like")
-    public ResponseEntity<String> handleLikeAction(@RequestBody LikeRequest request){
-        try{
-            System.out.println(request.getUsername()+" "+request.getPostId());
-            postService.toggleLike(request.getUsername(),request.getPostId());
-            return ResponseEntity.ok("Success");
-        }
-        catch(Exception e){
-
-            return  ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body("Error:"+e.getMessage());
-        }
     }
     @PostMapping
     public Post createPost(
 
                             @RequestParam("title") String title,
                            @RequestParam("content") String content,
+                           @RequestParam("category") Category category,
                            @RequestParam(value = "imageFile", required = false) MultipartFile imageFile,
                            @RequestParam(value = "videoFile", required = false) MultipartFile videoFile) throws IOException {
 
-        return postService.createPost(title, content, imageFile, videoFile);
+        return postService.createPost(title, content,category, imageFile, videoFile);
     }
 
+    @GetMapping("/recommend/{username}")
+    public List<Post> getRecommendationPostByUsername(@PathVariable String username){
+        List<Post> recommend= recommendationService.getRecommendationPosts(username);
+        return recommend;
+    }
 }

BE/src/main/java/org/example/controllers/SearchController.java

@@ -0,0 +1,29 @@
+package org.example.controllers;
+
+
+import ch.qos.logback.core.joran.sanity.Pair;
+import org.example.models.Post;
+import org.example.models.User;
+import org.example.objects.SearchResultDTO;
+import org.example.services.SearchService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+
+@RestController
+@RequestMapping("/search")
+public class SearchController {
+    @Autowired
+    private final SearchService searchService;
+
+    public SearchController(SearchService searchService) {
+        this.searchService = searchService;
+    }
+
+    @GetMapping("/get")
+    public List<Post> search(@RequestParam("condition") String condition) {
+        System.out.println(condition);
+        return searchService.searchResult(condition);
+    }
+}

BE/src/main/java/org/example/controllers/UserController.java

@@ -1,6 +1,7 @@
 package org.example.controllers;
 
 import org.example.models.User;
+import org.example.objects.FriendDTO;
 import org.example.objects.UserDTO;
 import org.example.repositories.UserRepository;
 import org.example.requests.CreateUserRequest;
@@ -36,4 +37,10 @@ public class UserController {
 
         return new ResponseEntity<>(responseUser, HttpStatus.CREATED);
     }
+    @PostMapping("/addFriend")
+    public ResponseEntity<String> addFriend(@RequestBody FriendDTO friendDTO){
+        userService.addFriend(friendDTO.getUsername1(),friendDTO.getUsername2());
+        System.out.println(friendDTO.getUsername1());
+        return new ResponseEntity<>("Friend added", HttpStatus.CREATED);
+    }
 }

BE/src/main/java/org/example/models/Category.java

@@ -0,0 +1,34 @@
+package org.example.models;
+
+import org.springframework.data.neo4j.core.schema.GeneratedValue;
+import org.springframework.data.neo4j.core.schema.Id;
+import org.springframework.data.neo4j.core.schema.Node;
+import org.springframework.data.neo4j.core.schema.Relationship;
+
+import java.util.List;
+
+
+
+@Node
+public class Category {
+    @Id
+    @GeneratedValue
+    private Long id;
+    private String name;
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+}

BE/src/main/java/org/example/models/Post.java

@@ -2,6 +2,8 @@ package org.example.models;
 
 
 import lombok.Getter;
+import org.example.realtionship.CommentRelationship;
+import org.example.realtionship.ShareRelationship;
 import org.example.repositories.PostRepository;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.data.neo4j.core.schema.GeneratedValue;
@@ -24,13 +26,33 @@ public class Post {
     private String content;
     private String author;
     private String imgUrl;
+    private int interactions;
+    @Relationship(type="HAS_CATEGORY", direction = Relationship.Direction.OUTGOING)
+    private Category category;
+
+    public Category getCategory() {
+        return category;
+    }
+
+    public void setCategory(Category category) {
+        this.category = category;
+    }
+
+    public int getInteractions() {
+        return interactions;
+    }
+
+    public void setInteractions(int interactions) {
+        this.interactions = interactions;
+    }
+
 
     public String getImgUrl() {
         return imgUrl;
     }
 
     public void setImgUrl(String imgUrl) {
-        this.imgUrl = imgUrl;
+        this.imgUrl=imgUrl;
     }
 
     public String getAuthor() {

BE/src/main/java/org/example/models/User.java

@@ -3,12 +3,14 @@ package org.example.models;
 import org.springframework.data.neo4j.core.schema.GeneratedValue;
 import org.springframework.data.neo4j.core.schema.Id;
 import org.springframework.data.neo4j.core.schema.Node;
+import org.springframework.data.neo4j.core.schema.Relationship;
 import org.springframework.security.core.GrantedAuthority;
 import org.springframework.security.core.authority.SimpleGrantedAuthority;
 import org.springframework.security.core.userdetails.UserDetails;
 
 import java.util.Arrays;
 import java.util.Collection;
+import java.util.List;
 
 @Node
 public class User implements UserDetails {
@@ -20,6 +22,22 @@ public class User implements UserDetails {
     private String password;
     private String roles;
 
+    @Relationship(type = "FRIEND")
+    private List<User> friends;
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+
+    public List<User> getFriends() {
+        return friends;
+    }
+
+    public void setFriends(List<User> friends) {
+        this.friends = friends;
+    }
+
     public User() {
     }
 

BE/src/main/java/org/example/objects/CommentDTO.java

@@ -0,0 +1,31 @@
+package org.example.objects;
+
+public class CommentDTO {
+    private String username;
+    private Long postId;
+    private String content;
+
+    public String getUsername() {
+        return username;
+    }
+
+    public void setUsername(String username) {
+        this.username = username;
+    }
+
+    public Long getPostId() {
+        return postId;
+    }
+
+    public void setPostId(Long postId) {
+        this.postId = postId;
+    }
+
+    public String getContent() {
+        return content;
+    }
+
+    public void setContent(String content) {
+        this.content = content;
+    }
+}

BE/src/main/java/org/example/objects/FriendDTO.java

@@ -0,0 +1,21 @@
+package org.example.objects;
+
+public class FriendDTO {
+    private String username1,username2;
+
+    public String getUsername1() {
+        return username1;
+    }
+
+    public void setUsername1(String username1) {
+        this.username1 = username1;
+    }
+
+    public String getUsername2() {
+        return username2;
+    }
+
+    public void setUsername2(String username2) {
+        this.username2 = username2;
+    }
+}

BE/src/main/java/org/example/objects/InteractionsDTO.java

@@ -0,0 +1,22 @@
+package org.example.objects;
+
+public class InteractionsDTO {
+    private String username;
+    private Long postId;
+
+    public String getUsername() {
+        return username;
+    }
+
+    public void setUsername(String username) {
+        this.username = username;
+    }
+
+    public Long getPostId() {
+        return postId;
+    }
+
+    public void setPostId(Long postId) {
+        this.postId = postId;
+    }
+}

BE/src/main/java/org/example/objects/PostDTO.java

@@ -1,10 +1,22 @@
 package org.example.objects;
 
+import org.example.models.Category;
 import org.springframework.web.multipart.MultipartFile;
 
 public class PostDTO {
     String title,content;
-    MultipartFile imageFile,videoFile;
+    Category category;
+    MultipartFile imageFile;
+
+    public Category getCategory() {
+        return category;
+    }
+
+    public void setCategory(Category category) {
+        this.category = category;
+    }
+
+    MultipartFile videoFile;
 
     public String getTitle() {
         return title;

BE/src/main/java/org/example/objects/PostWithMedia.java

@@ -0,0 +1,39 @@
+package org.example.objects;
+
+import org.example.models.Image;
+import org.example.models.Post;
+import org.example.models.Video;
+import org.springframework.data.neo4j.core.schema.Node;
+import java.util.List;
+
+public class PostWithMedia {
+    private Post post;
+    private List<Image> images;
+    private List<Video> videos;
+
+    // Getters and setters
+    public Post getPost() {
+        return post;
+    }
+
+    public void setPost(Post post) {
+        this.post = post;
+    }
+
+    public List<Image> getImages() {
+        return images;
+    }
+
+    public void setImages(List<Image> images) {
+        this.images = images;
+    }
+
+    public List<Video> getVideos() {
+        return videos;
+    }
+
+    public void setVideos(List<Video> videos) {
+        this.videos = videos;
+    }
+}
+

BE/src/main/java/org/example/objects/SearchResultDTO.java

@@ -0,0 +1,36 @@
+package org.example.objects;
+
+import org.example.models.Post;
+import org.example.models.User;
+import org.springframework.data.neo4j.core.schema.GeneratedValue;
+import org.springframework.data.neo4j.core.schema.Id;
+import org.springframework.web.bind.annotation.GetMapping;
+
+public class SearchResultDTO {
+    @Id
+    @GeneratedValue
+    private  Long id;
+    private User user;
+    private Post post;
+
+    public SearchResultDTO(Post post, User user) {
+        this.user = user;
+        this.post = post;
+    }
+
+    public User getUser() {
+        return user;
+    }
+
+    public void setUser(User user) {
+        this.user = user;
+    }
+
+    public Post getPost() {
+        return post;
+    }
+
+    public void setPost(Post post) {
+        this.post = post;
+    }
+}

BE/src/main/java/org/example/queryresults/CourseEnrolmentQueryResult.java

@@ -3,7 +3,7 @@ package org.example.queryresults;
 
 import org.example.models.User;
 
-public class CourseEnrolmentQueryResult {
+public class                    CourseEnrolmentQueryResult {
     private User user;
 
     public CourseEnrolmentQueryResult() {

BE/src/main/java/org/example/realtionship/CommentRelationship.java

@@ -0,0 +1,61 @@
+package org.example.realtionship;
+
+import org.example.models.User;
+import org.springframework.data.neo4j.core.schema.GeneratedValue;
+import org.springframework.data.neo4j.core.schema.Id;
+import org.springframework.data.neo4j.core.schema.RelationshipProperties;
+import org.springframework.data.neo4j.core.schema.TargetNode;
+import org.springframework.web.bind.annotation.GetMapping;
+
+import java.time.LocalDateTime;
+
+@RelationshipProperties
+public class CommentRelationship {
+    @Id
+    @GeneratedValue
+    private Long id;
+    private String content;
+    private LocalDateTime timestamp;
+
+    @TargetNode private User user;
+
+    public CommentRelationship(String content, LocalDateTime timestamp, User user) {
+        this.content = content;
+        this.timestamp = timestamp;
+        this.user = user;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getContent() {
+        return content;
+    }
+
+    public void setContent(String content) {
+        this.content = content;
+    }
+
+    public LocalDateTime getTimestamp() {
+        return timestamp;
+    }
+
+    public void setTimestamp(LocalDateTime timestamp) {
+        this.timestamp = timestamp;
+    }
+
+    public User getUser() {
+        return user;
+    }
+
+    public void setUser(User user) {
+        this.user = user;
+    }
+
+    // Getters and Setters
+}

BE/src/main/java/org/example/realtionship/ShareRelationship.java

@@ -0,0 +1,51 @@
+package org.example.realtionship;
+
+import org.example.models.User;
+import org.springframework.data.annotation.Id;
+import org.springframework.data.neo4j.core.schema.GeneratedValue;
+import org.springframework.data.neo4j.core.schema.RelationshipProperties;
+import org.springframework.data.neo4j.core.schema.TargetNode;
+
+import java.time.LocalDateTime;
+
+@RelationshipProperties
+public class ShareRelationship {
+    @Id
+    @GeneratedValue
+    private Long id;
+    private LocalDateTime timestamp;
+
+    @TargetNode
+    private User user;
+
+    public ShareRelationship(LocalDateTime timestamp, User user) {
+        this.timestamp = timestamp;
+        this.user = user;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public LocalDateTime getTimestamp() {
+        return timestamp;
+    }
+
+    public void setTimestamp(LocalDateTime timestamp) {
+        this.timestamp = timestamp;
+    }
+
+    public User getUser() {
+        return user;
+    }
+
+    public void setUser(User user) {
+        this.user = user;
+    }
+
+    // Getters and Setters
+}

BE/src/main/java/org/example/repositories/CategoryRepository.java

@@ -0,0 +1,26 @@
+package org.example.repositories;
+
+import org.example.models.Category;
+import org.example.models.Post;
+import org.example.objects.PostDTO;
+import org.example.objects.PostWithMedia;
+import org.springframework.data.neo4j.repository.Neo4jRepository;
+import org.springframework.data.neo4j.repository.query.Query;
+import org.springframework.data.repository.query.Param;
+import org.springframework.stereotype.Repository;
+
+import java.util.List;
+
+@Repository
+public interface CategoryRepository extends Neo4jRepository<Category, Long> {
+    Category findByName(String name);
+    @Query("MATCH (c:Category)<-[:HAS_CATEGORY]-(p:Post)\n" +
+            "WHERE c.name = $categoryName\n" +
+            "OPTIONAL MATCH (p)-[:HAS_IMAGE]->(image:Image)\n" +
+            "OPTIONAL MATCH (p)-[:HAS_VIDEO]->(video:Video)\n" +
+            "RETURN ID(p)")
+    List<Long> findPostsByCategoryNames(@Param("categoryName") String categoryName);
+
+    @Query("MATCH (post:Post)-[HAS_CATEGORY]->(cate:Category) WHERE ID(post)=$postId return cate")
+    Category getCategory(@Param("postId") Long postId);
+}

BE/src/main/java/org/example/repositories/PostRepository.java

@@ -1,6 +1,7 @@
 package org.example.repositories;
 
 import org.example.controllers.UserController;
+import org.example.models.Category;
 import org.example.models.Image;
 import org.example.models.Post;
 import org.example.queryresults.PostQueryResult;
@@ -28,6 +29,8 @@ public interface PostRepository extends Neo4jRepository<Post,Long> {
                 "return image.filename")
         String getImage(@Param("postId") Long postId);
 
+
+
         @Query("MATCH (p:Post ) where ID(p)=$postId \n" +
                 "SET p.title = $title,\n" +
                 "    p.content = $content\n" +
@@ -48,13 +51,52 @@ public interface PostRepository extends Neo4jRepository<Post,Long> {
                 ")\n" +
                 "RETURN p")
         Post updatePost(@Param("postId") Long postId, @Param("title") String title, @Param("content") String content, @Param("imageFile")MultipartFile imageFile, @Param("videoFile") MultipartFile videoFile);
-        @Query("MATCH (u:User {username: $username}), (p:Post) WHERE ID(p)=$postId CREATE (u)-[:LIKES]->(p)")
-        void createLike(@Param("username") String username,@Param("postId") Long postId);
 
-        @Query("MATCH (u:User {username: $username})-[r:LIKES]->(p:Post )  WHERE ID(p)=$postId DELETE r")
+        @Query("MATCH (u:User), (p:Post) WHERE u.username = $username AND ID(p) = $postId " +
-        void deleteLike(@Param("username") String username, @Param("postId") Long postId);
+                "MERGE (u)-[:LIKED {timestamp: datetime()}]->(p) " +
+                "RETURN p")
+        Post likePost(@Param("username") String username, @Param("postId") Long postId);
+
+        @Query("MATCH (u:User)-[l:LIKED]->(p:Post) " +
+                "WHERE u.username=$username AND ID(p) = $postId " +
+                "DELETE l " +
+                "RETURN CASE WHEN COUNT(l) > 0 THEN true ELSE false END AS removed")
+        boolean toggleLike(@Param("username") String username, @Param("postId") Long postId);
+
+
+        @Query("MATCH (u:User), (p:Post) WHERE u.username=$username AND ID(p) = $postId " +
+                "MERGE (u)-[:COMMENTED {content: $content, timestamp: datetime()}]->(p) " +
+                "RETURN p")
+        Post commentPost(@Param("username") String username, @Param("postId") Long postId, @Param("content") String content);
+        @Query("MATCH (u:User), (p:Post) WHERE u.username=$username AND ID(p) = $postId " +
+                "MERGE (u)-[:SHARED {timestamp: datetime()}]->(p) " +
+                "RETURN p")
+        Post sharePost(@Param("username") String username, @Param("postId") Long postId);
+
+        @Query("MATCH (p:Post),(u:User)\n" +
+                "OPTIONAL MATCH (p)<-[l:LIKED]-(u)\n" +
+                "OPTIONAL MATCH (p)<-[c:COMMENTED]-(u)\n" +
+                "OPTIONAL MATCH (p)<-[s:SHARED]-(u)\n" +
+                "OPTIONAL MATCH (p)-[:HAS_IMAGE]->(image:Image)\n" +
+                "OPTIONAL MATCH (p)-[:HAS_VIDEO]->(video:Video)\n" +
+                "WITH p, \n" +
+                "     COUNT(DISTINCT l) AS likeCount, \n" +
+                "     COUNT(DISTINCT c) AS commentCount, \n" +
+                "     COUNT(DISTINCT s) AS shareCount, \n" +
+                "     COLLECT(DISTINCT image) AS images, \n" +
+                "     COLLECT(DISTINCT video) AS videos\n" +
+                "RETURN p, images, videos\n" +
+                "ORDER BY (likeCount + commentCount + shareCount) DESC\n" +
+                "LIMIT 10\n")
+        List<Post> findTop10ByInteractions();
 
         @Query("MATCH (user:User {username: $username}),(post:Post )"+"where ID(post)=$postId"+ " CREATE (user)-[:createPost ]->(post)"+
                 "RETURN user, post")
         PostQueryResult createPostRelationship(@Param("username") String username,@Param("postId") Long postId);
+
+//        @Query("match (p:Post)where id(p)=$postID\n" +
+//                "optional match (p)-[:HAS_IMAGE]->(image:Image)\n" +
+//                "optional match (p)-[:HAS_VIDEO]->(video:Video)\n" +
+//                "return p,image")
+//        List<Post> fi
 }

BE/src/main/java/org/example/repositories/SearchRepository.java

@@ -0,0 +1,23 @@
+package org.example.repositories;
+
+import ch.qos.logback.core.joran.sanity.Pair;
+import org.example.models.Post;
+import org.example.models.User;
+import org.example.objects.SearchResultDTO;
+import org.springframework.data.neo4j.repository.Neo4jRepository;
+import org.springframework.data.neo4j.repository.query.Query;
+import org.springframework.data.repository.CrudRepository;
+import org.springframework.data.repository.query.Param;
+import org.springframework.stereotype.Repository;
+
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+
+@Repository
+public interface SearchRepository extends Neo4jRepository<Post,Long> {
+    @Query("MATCH (p:Post)<-[:createPost]-(u:User)\n" +
+            "WHERE p.title CONTAINS $condition OR p.content CONTAINS $condition OR u.username CONTAINS $condition \n" +
+            "RETURN p \n")
+    List<Post> search(@Param("condition") String condition);
+}

BE/src/main/java/org/example/repositories/UserRepository.java

@@ -1,25 +1,53 @@
 package org.example.repositories;
 
+import org.example.models.Category;
+import org.example.models.Post;
 import org.example.models.User;
+import org.example.objects.FriendDTO;
 import org.example.queryresults.PostQueryResult;
+import org.example.services.UserService;
 import org.springframework.data.neo4j.repository.Neo4jRepository;
 import org.springframework.data.neo4j.repository.query.Query;
+import org.springframework.data.repository.query.Param;
+import org.springframework.stereotype.Repository;
+import org.springframework.web.bind.annotation.RequestBody;
 
+import java.util.List;
 import java.util.Optional;
 
+@Repository
 public interface UserRepository extends Neo4jRepository<User, Long> {
-    Optional<User> findUserByUsername(String username);
-    User findUserBy(String username);
-    boolean existsByUsername(String username);
 
 
-    @Query("MATCH (user:User), (course:Course) WHERE user.username = $username AND course.identifier = $identifier " +
+    Optional<User> findUserByUsername(String username);
-            "RETURN EXISTS((user)-[:ENROLLED_IN]->(course))")
+    boolean existsByUsername(String username);
-    Boolean findEnrolmentStatus(String username, String identifier);
 
-//    @Query("MATCH (user:User), (course:Course) WHERE user.username = $username AND course.identifier = $identifier " +
+    @Query("MATCH (u:User {name:$username1}), (f:User {name:$username2})\n" +
-//            "CREATE (user)-[:ENROLLED_IN]->(course) RETURN user, course")
+            "OPTIONAL MATCH (u)-[fr:Friend]->(f), (f)-[fr1:Friend]->(u)\n" +
-//    CourseEnrolmentQueryResult createEnrolmentRelationship(String username, String identifier);
+            "WITH u, f, collect(fr) as friendships1, collect(fr1) as friendships2\n" +
+            "FOREACH (_ IN CASE WHEN size(friendships1) = 0 AND size(friendships2) = 0 THEN [1] ELSE [] END | \n" +
+            "    CREATE (u)-[:Friend]->(f) \n" +
+            "    CREATE (f)-[:Friend]->(u))\n" +
+            "FOREACH (_ IN CASE WHEN size(friendships1) > 0 AND size(friendships2) > 0 THEN [1] ELSE [] END | \n" +
+            "    DELETE friendships1[0], friendships2[0])\n")
+    void addFriend(@Param("username1") String username1, @Param("username2") String username2);
+
+
+
+    @Query("MATCH (u:User {username:$username})-[:Friend]->(f:User)\n" +
+            "match (f)-[:createPost]->(p:Post)RETURN ID(p)")
+    List<Long> findFriendPosts(@Param("username") String username);
+
+    @Query("MATCH (u:User {username: $username})-[r:LIKED|COMMENTED|SHARED]->(p:Post)\n" +
+            "OPTIONAL MATCH (p)<-[like:LIKED]-(:User)\n" +
+            "OPTIONAL MATCH (p)<-[comment:COMMENTED]-(:User)\n" +
+            "OPTIONAL MATCH (p)<-[share:SHARED]-(:User)\n" +
+            "OPTIONAL MATCH (p)-[:HAS_CATEGORY]->(c:Category)\n" +
+            "WITH p, COUNT(DISTINCT like) AS likeCount, COUNT(DISTINCT comment) AS commentCount, COUNT(DISTINCT share) AS shareCount, c.name AS categories \n" +
+            "WHERE likeCount > 0 OR commentCount > 0 OR shareCount > 0\n" +
+            "RETURN categories \n" +
+            "ORDER BY (likeCount + commentCount + shareCount) DESC")
+    List<String> findInteractedCategories(@Param("username") String username);
 
 
 }

BE/src/main/java/org/example/services/CategoryService.java

@@ -0,0 +1,23 @@
+package org.example.services;
+
+
+import org.example.models.Category;
+import org.example.repositories.CategoryRepository;
+import org.springframework.stereotype.Service;
+
+import java.util.ArrayList;
+import java.util.List;
+
+@Service
+public class CategoryService {
+    private final CategoryRepository categoryRepository;
+
+    public CategoryService(CategoryRepository categoryRepository) {
+        this.categoryRepository = categoryRepository;
+    }
+
+    public List<Category> getAllCategories() {
+        List<Category> categories = categoryRepository.findAll();
+        return categories;
+    }
+}

BE/src/main/java/org/example/services/InteractService.java

@@ -0,0 +1,45 @@
+package org.example.services;
+
+import org.example.models.*;
+import org.example.realtionship.CommentRelationship;
+import org.example.realtionship.ShareRelationship;
+import org.example.repositories.*;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.security.core.userdetails.UserDetailsService;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.time.LocalDateTime;
+import java.util.List;
+import java.util.Optional;
+
+@Service
+public class InteractService  {
+    private final PostRepository postRepository;
+    private final UserRepository userRepository;
+
+    @Autowired
+    public InteractService(PostRepository postRepository, UserRepository userRepository) {
+        this.postRepository = postRepository;
+        this.userRepository = userRepository;
+    }
+
+    @Transactional
+    public void toggleLike(String username , Long postId) {
+        boolean removed = postRepository.toggleLike(username, postId);
+        if (!removed) {
+            postRepository.likePost(username, postId);
+            System.out.println("Liked");
+        }
+    }
+
+    @Transactional
+    public void commentPost(String username, Long postId, String content) {
+        postRepository.commentPost(username, postId, content);
+    }
+
+    @Transactional
+    public void sharePost(String username, Long postId) {
+        postRepository.sharePost(username, postId);
+    }
+}

BE/src/main/java/org/example/services/PostService.java

@@ -3,10 +3,7 @@ package org.example.services;
 //import org.example.models.Author;
 import jakarta.transaction.Transactional;
 import org.example.controllers.UserController;
-import org.example.models.Image;
+import org.example.models.*;
-import org.example.models.Post;
-import org.example.models.User;
-import org.example.models.Video;
 import org.example.queryresults.PostQueryResult;
 import org.example.repositories.PostRepository;
 import org.example.repositories.UserRepository;
@@ -23,6 +20,7 @@ import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.security.Principal;
+import java.time.LocalDateTime;
 import java.util.List;
 import java.util.Map;
 import java.util.Optional;
@@ -36,6 +34,7 @@ public class PostService {
     private final UserService userService;
     private final UserRepository userRepository;
     private String username;
+    private Category category;
 
     @Autowired
     private Neo4jTemplate neo4jTemplate;
@@ -64,27 +63,13 @@ public class PostService {
         return getAllPost;
     }
     @Transactional
-    public void toggleLike(String username,Long postId){
+    public Post createPost(String title, String content,Category category, MultipartFile imageFile, MultipartFile videoFile) throws IOException {
-        System.out.println("Service:"+username+postId);
-        boolean alreadyLiked = neo4jTemplate.count("MATCH (u:User {username: $username})-[r:LIKES]->(p:Post) WHERE ID(p)=$postId RETURN count(r) ",
-                Map.of("username", username, "postId", postId)) > 0;
-
-        if (alreadyLiked) {
-            postRepository.deleteLike(username,postId);
-
-        } else {
-            System.out.println("Like de");
-            postRepository.createLike(username,postId);
-        }
-    }
-    @Transactional
-    public Post createPost(String title, String content, MultipartFile imageFile, MultipartFile videoFile) throws IOException {
         Post post = new Post();
         post.setTitle(title);
         post.setContent(content);
-
+        post.setCategory(category);
         if (imageFile != null) {
-            Image image = saveImageFile(imageFile, "C:\\Users\\P R O B O O K\\Documents\\Phuc\\Facebook\\FE/FE/public/picture");
+            Image image = saveImageFile(imageFile, "C:\\Users\\phucl\\OneDrive\\Desktop\\JAVA_INTER\\Facebook\\FE\\FE\\public\\picture");
 //            post.getImages().add(image);
             post.setImages(image);
         }
@@ -112,11 +97,11 @@ public class PostService {
         }
     }
     @Transactional
-    public Post editPost(Long postId, String title, String content, MultipartFile imageFile, MultipartFile videoFile) throws IOException {
+    public Post editPost(Long postId, String title, String content,Category category, MultipartFile imageFile, MultipartFile videoFile) throws IOException {
         Post post= postRepository.updatePost(postId,title,content,imageFile,videoFile);
         // Update the image file if provided
         if (imageFile != null) {
-            Image newImage = saveImageFile(imageFile, "C:\\Users\\P R O B O O K\\Documents\\Phuc\\Facebook\\FE/FE/public/picture");
+            Image newImage = saveImageFile(imageFile, "C:\\Users\\phucl\\OneDrive\\Desktop\\JAVA_INTER\\Facebook\\FE\\FE\\public\\picture");
             post.setImages(newImage);
         }
 

BE/src/main/java/org/example/services/RecommendationService.java

@@ -0,0 +1,67 @@
+package org.example.services;
+
+
+import org.example.models.Category;
+import org.example.models.Post;
+import org.example.objects.PostDTO;
+import org.example.objects.PostWithMedia;
+import org.example.repositories.CategoryRepository;
+import org.example.repositories.PostRepository;
+import org.example.repositories.UserRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.List;
+import java.util.stream.Collectors;
+
+@Service
+public class RecommendationService {
+    private final PostRepository postRepository;
+    private final UserRepository userRepository;
+    private final CategoryRepository categoryRepository;
+
+    @Autowired
+    public RecommendationService(PostRepository postRepository, UserRepository userRepository, CategoryRepository categoryRepository) {
+        this.postRepository = postRepository;
+        this.userRepository = userRepository;
+        this.categoryRepository = categoryRepository;
+    }
+
+    public List<Post> getRecommendationPosts(String username) {
+        List<Post> recommendationPosts = new ArrayList<>();
+        //tim kiem bai viết phổ biến theo số lượng interact
+        List<Post> postsInteracts  = new ArrayList<>();
+        postsInteracts=postRepository.findTop10ByInteractions();
+        for (Post post : postsInteracts) {
+            post.setImgUrl(postRepository.getImage(post.getId()));
+            recommendationPosts.add(post);
+        }                                                   
+        //tìm kiếm các bài post có chung chủ đề
+       List<String> categoriesNames = userRepository.findInteractedCategories(username);
+        for (String categoryName : categoriesNames) {
+            System.out.println(categoryName);
+            List<Long> IDposts = categoryRepository.findPostsByCategoryNames(categoryName);
+            for(Long IDpost : IDposts) {
+                System.out.println(IDpost);
+                Post post= postRepository.findById(IDpost).get();
+                if(!recommendationPosts.contains(post)) {
+                    recommendationPosts.add(post);
+                    post.setImgUrl(postRepository.getImage(IDpost));
+                }
+            }
+        }
+        List<Long> postsFriend;
+        postsFriend=userRepository.findFriendPosts(username);
+        for (Long postID : postsFriend) {
+            Post post = postRepository.findById(postID).get();
+            if(!recommendationPosts.contains(post)) {
+                post.setImgUrl(postRepository.getImage(post.getId()));
+                recommendationPosts.add(post);
+            }
+        }
+        return recommendationPosts.stream().distinct().collect(Collectors.toList());
+    }
+
+}

BE/src/main/java/org/example/services/SearchService.java

@@ -0,0 +1,40 @@
+package org.example.services;
+
+
+import ch.qos.logback.core.joran.sanity.Pair;
+import org.example.models.Post;
+import org.example.models.User;
+import org.example.objects.SearchResultDTO;
+import org.example.repositories.CategoryRepository;
+import org.example.repositories.PostRepository;
+import org.example.repositories.SearchRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+@Service
+public class SearchService {
+    @Autowired
+    private final SearchRepository searchRepository;
+    @Autowired
+    private final PostRepository postRepository;
+    @Autowired
+    private final CategoryRepository categoryRepository;
+
+    public SearchService(SearchRepository searchRepository, PostRepository postRepository,CategoryRepository categoryRepository) {
+        this.searchRepository = searchRepository;
+        this.postRepository = postRepository;
+        this.categoryRepository = categoryRepository;
+    }
+    public List<Post> searchResult(String condition) {
+        List<Post> posts= searchRepository.search(condition);
+        for(Post post: posts) {
+            post.setImgUrl(postRepository.getImage(post.getId()));
+            post.setCategory(categoryRepository.getCategory(post.getId()));
+        }
+        return posts;
+    }
+
+}

BE/src/main/java/org/example/services/UserService.java

@@ -1,6 +1,7 @@
 package org.example.services;
 
 import org.example.models.User;
+import org.example.repositories.PostRepository;
 import org.example.repositories.UserRepository;
 import org.example.requests.CreateUserRequest;
 import org.springframework.security.crypto.password.PasswordEncoder;
@@ -11,10 +12,12 @@ public class UserService {
     private final UserRepository userRepository;
 
     private final PasswordEncoder passwordEncoder;
+    private final PostRepository postRepository;
 
-    public UserService(UserRepository userRepository, PasswordEncoder passwordEncoder) {
+    public UserService(UserRepository userRepository, PasswordEncoder passwordEncoder, PostRepository postRepository) {
         this.userRepository = userRepository;
         this.passwordEncoder = passwordEncoder;
+        this.postRepository = postRepository;
     }
 
     public User createUser(CreateUserRequest request) {
@@ -33,4 +36,7 @@ public class UserService {
 
         return user;
     }
+    public void addFriend(String username1, String username2) {
+        userRepository.addFriend(username1,username2);
+    }
 }

BE/src/main/resources/application.properties

@@ -1,4 +1,3 @@
 spring.neo4j.uri=neo4j://localhost:7687
 spring.neo4j.authentication.username=neo4j
 spring.neo4j.authentication.password=12345678
-file_upload = C:/Users/P R O B O O K/Documents/Facebook/BE/images