Ensure existin user cannot create an account

pom.xml

@@ -51,6 +51,7 @@
             <artifactId>spring-boot-starter-test</artifactId>
             <scope>test</scope>
         </dependency>
+
     </dependencies>
 
     <build>

src/main/java/com/michael/controller/AuthenticationController.java

@@ -9,10 +9,7 @@
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
-import org.springframework.web.bind.annotation.GetMapping;
-import org.springframework.web.bind.annotation.RequestBody;
-import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.bind.annotation.*;
 
 import javax.servlet.http.HttpSession;
 import javax.validation.Valid;
@@ -24,9 +21,13 @@ public class AuthenticationController {
     @Autowired
     IUserService userService;
 
-    @RequestMapping(path = "register")
+    @PostMapping(path = "register")
     public ResponseEntity<UserResponse> register(@Valid @RequestBody UserRegisterRequest request, HttpSession session) {
 
+        boolean isUserExists = userService.checkIfUserExist(request.getEmail());
+        if (isUserExists) {
+            throw new UserException("User email already exist. Please Login");
+        }
         User user = userService.register(request);
         session.setAttribute("user_session", user);
 
@@ -36,6 +37,7 @@ public ResponseEntity<UserResponse> register(@Valid @RequestBody UserRegisterReq
 
     @GetMapping(path = "login")
     public ResponseEntity<?> login(@Valid @RequestBody UserLoginRequest request, HttpSession session) {
+
         User user = userService.login(request);
         if (user == null) {
             throw new UserException("Check Email or Password");

src/main/java/com/michael/controller/PostController.java

@@ -0,0 +1,36 @@
+package com.michael.controller;
+
+import com.michael.exception.UserException;
+import com.michael.model.Post;
+import com.michael.model.User;
+import com.michael.request.PostRequest;
+import com.michael.response.PostResponse;
+import com.michael.service.contracts.IPostService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+import javax.servlet.http.HttpSession;
+import javax.validation.Valid;
+
+@RestController
+@RequestMapping(path = "posts")
+public class PostController {
+
+    @Autowired
+    IPostService postService;
+
+    @GetMapping()
+
+    @PostMapping(value = "create")
+    public ResponseEntity<PostResponse> store(@Valid @RequestBody PostRequest request, HttpSession session) {
+
+        User authUser = (User) session.getAttribute("user_session");
+        if (authUser == null) throw new UserException("Please login before you can create post");
+        Post post = postService.addPost(request, authUser);
+
+        return new ResponseEntity<>(new PostResponse(post, "Post Added Successfully!"), HttpStatus.OK);
+    }
+}

src/main/java/com/michael/model/Post.java

@@ -0,0 +1,24 @@
+package com.michael.model;
+
+import com.michael.utils.AutoDate;
+import lombok.Getter;
+import lombok.Setter;
+
+import javax.persistence.*;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "posts")
+public class Post extends AutoDate {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+    @ManyToOne
+    @JoinColumn(name = "user_id")
+    private User user;
+    private String title;
+    @Column(columnDefinition = "TEXT")
+    private String body;
+}

src/main/java/com/michael/repository/PostRepository.java

@@ -0,0 +1,9 @@
+package com.michael.repository;
+
+import com.michael.model.Post;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface PostRepository extends JpaRepository<Post, Long> {
+}

src/main/java/com/michael/repository/UserRepository.java

@@ -11,4 +11,8 @@ public interface UserRepository extends JpaRepository<User, Long> {
 
     Optional<User> findByEmailAndPassword(String email, String password);
 
+//    boolean existsByEmail(String email);
+
+    boolean existsUsersByEmail(String email);
+
 }

src/main/java/com/michael/request/PostRequest.java

@@ -0,0 +1,17 @@
+package com.michael.request;
+
+import com.michael.model.User;
+import lombok.Getter;
+import lombok.Setter;
+
+import javax.validation.constraints.NotEmpty;
+
+@Getter
+@Setter
+public class PostRequest {
+    private User user;
+    @NotEmpty(message = "Title field cannot be empty")
+    private String title;
+    @NotEmpty(message = "Body field cannot be empty")
+    private String body;
+}

src/main/java/com/michael/response/PostResponse.java

@@ -0,0 +1,16 @@
+package com.michael.response;
+
+import com.michael.model.Post;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+@Getter
+@Setter
+@AllArgsConstructor
+@NoArgsConstructor
+public class PostResponse {
+    private Post post;
+    private String message;
+}

src/main/java/com/michael/response/UserResponse.java

@@ -5,7 +5,6 @@
 import lombok.Getter;
 import lombok.NoArgsConstructor;
 import lombok.Setter;
-import org.springframework.http.HttpStatus;
 
 @Getter
 @Setter

src/main/java/com/michael/service/PostService.java

@@ -0,0 +1,26 @@
+package com.michael.service;
+
+import com.michael.model.Post;
+import com.michael.model.User;
+import com.michael.repository.PostRepository;
+import com.michael.request.PostRequest;
+import com.michael.service.contracts.IPostService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+@Service
+public class PostService implements IPostService {
+
+    @Autowired
+    PostRepository postRepository;
+
+    @Override
+    public Post addPost(PostRequest request, User user) {
+        Post post = new Post();
+        post.setUser(user);
+        post.setTitle(request.getTitle());
+        post.setBody(request.getBody());
+
+        return postRepository.save(post);
+    }
+}

src/main/java/com/michael/service/UserService.java

@@ -38,4 +38,8 @@ public User login(UserLoginRequest request) {
 
         return user;
     }
+
+    public boolean checkIfUserExist(String email) {
+       return userRepository.existsUsersByEmail(email);
+    }
 }

src/main/java/com/michael/service/contracts/IPostService.java

@@ -0,0 +1,10 @@
+package com.michael.service.contracts;
+
+import com.michael.model.Post;
+import com.michael.model.User;
+import com.michael.request.PostRequest;
+
+public interface IPostService {
+    Post addPost(PostRequest request, User user);
+
+}

src/main/java/com/michael/service/contracts/IUserService.java

@@ -7,6 +7,7 @@
 
 public interface IUserService {
 
+    boolean checkIfUserExist(String email);
     User register(UserRegisterRequest userRegisterRequest);
     User login(UserLoginRequest userLoginRequest);
 }

week-9-task-michael-ikpefua.iml

@@ -14,7 +14,9 @@
       <configuration>
         <setting name="validation-enabled" value="true" />
         <setting name="provider-name" value="Hibernate" />
-        <datasource-mapping />
+        <datasource-mapping>
+          <factory-entry name="entityManagerFactory" />
+        </datasource-mapping>
         <naming-strategy-map />
       </configuration>
     </facet>