Forgot Password Implementation - BE

app/backend/pom.xml

@@ -52,6 +52,10 @@
 			<artifactId>spring-boot-starter-test</artifactId>
 			<scope>test</scope>
 		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-mail</artifactId>
+		</dependency>
 		<dependency>
 			<groupId>io.jsonwebtoken</groupId>
 			<artifactId>jjwt</artifactId>

app/backend/src/main/java/com/app/gamereview/controller/AuthController.java

@@ -3,30 +3,45 @@
 import com.app.gamereview.dto.request.LoginUserRequestDto;
 import com.app.gamereview.dto.request.ChangeUserPasswordRequestDto;
 import com.app.gamereview.dto.request.RegisterUserRequestDto;
+import com.app.gamereview.dto.request.VerifyResetCodeRequestDto;
 import com.app.gamereview.dto.response.LoginUserResponseDto;
+import com.app.gamereview.model.ResetCode;
 import com.app.gamereview.model.User;
+import com.app.gamereview.repository.ResetCodeRepository;
 import com.app.gamereview.service.AuthService;
+import com.app.gamereview.service.EmailService;
+import com.app.gamereview.service.UserService;
 import com.app.gamereview.util.JwtUtil;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.*;
 
+import java.util.Date;
 import java.util.Optional;
+import java.util.UUID;
 
 @RestController
 @RequestMapping("/api/auth")
 public class AuthController {
 
 	private final AuthService authService;
 
+	private final EmailService emailService;
+
+	private final UserService userService;
+
+	private final ResetCodeRepository resetCodeRepository;
+
 	@Autowired
-	public AuthController(AuthService authService) {
+	public AuthController(AuthService authService, EmailService emailService, UserService userService,
+			ResetCodeRepository resetCodeRepository) {
 		this.authService = authService;
+		this.emailService = emailService;
+		this.userService = userService;
+		this.resetCodeRepository = resetCodeRepository;
 	}
 
-	@Autowired
-	private JwtUtil jwtUtil;
-
 	@PostMapping("/register")
 	public ResponseEntity<User> registerUser(@RequestBody RegisterUserRequestDto registerUserRequestDto) {
 		User userToCreate = authService.registerUser(registerUserRequestDto);
@@ -45,4 +60,66 @@ public ResponseEntity<LoginUserResponseDto> login(@RequestBody LoginUserRequestD
 		return ResponseEntity.ok(loginResponse);
 	}
 
+	@PostMapping("/forgot-password")
+	public ResponseEntity<String> forgotPassword(@RequestParam String email) {
+		User user = userService.getUserByEmail(email);
+
+		if (user == null) {
+			return ResponseEntity.status(HttpStatus.NOT_FOUND).body("User not found");
+		}
+
+		// Generate and save a reset code (you can use UUID or any secure method)
+		String code = generateResetCode(user.getId());
+
+		// Send email with reset code
+		String subject = "Password Reset";
+		String message = "Your password reset code is: " + code;
+		message += "\n The reset code will expire after 24 hours.";
+		emailService.sendEmail(email, subject, message);
+
+		return ResponseEntity.ok("Reset code sent successfully");
+	}
+
+	@PostMapping("/verify-reset-code")
+	public ResponseEntity<String> verifyResetCode(@RequestBody VerifyResetCodeRequestDto request) {
+		Optional<ResetCode> resetCodeOptional = resetCodeRepository.findByCode(request.getResetCode());
+		if (resetCodeOptional.isEmpty() || resetCodeOptional.get().getExpirationDate().before(new Date())) {
+			// Invalid or expired reset code
+			return ResponseEntity.status(HttpStatus.BAD_REQUEST).body("Invalid or expired reset code");
+		}
+
+		ResetCode resetCode = resetCodeOptional.get();
+
+		// Check if the reset code matches the user
+		String userEmail = userService.getUserById(resetCode.getUserId()).getEmail();
+		if (!userEmail.equals(request.getUserEmail())) {
+			// Reset code does not match the user
+			return ResponseEntity.status(HttpStatus.BAD_REQUEST).body(userEmail + "  " + request.getUserEmail());
+		}
+
+		// Reset code is valid, generate a JWT token for the user
+		String token = JwtUtil.generateToken(userService.getUserById(resetCode.getUserId()).getEmail());
+
+		// Clear the reset code after generating the token
+		resetCodeRepository.deleteByUserId(resetCode.getUserId());
+
+		return ResponseEntity.ok(token);
+	}
+
+	private String generateResetCode(String userId) {
+		// Check if a reset code exists for the user
+		ResetCode existingResetCode = resetCodeRepository.findByUserId(userId);
+
+		// If a reset code exists, delete it
+		if (existingResetCode != null) {
+			resetCodeRepository.delete(existingResetCode);
+		}
+		String code = UUID.randomUUID().toString().replace("-", "").substring(0, 6).toUpperCase();
+
+		ResetCode resetCode = new ResetCode(code, userId, new Date(System.currentTimeMillis() + 24 * 60 * 60 * 1000));
+		resetCodeRepository.save(resetCode);
+
+		return code;
+	}
+
 }

app/backend/src/main/java/com/app/gamereview/dto/request/VerifyResetCodeRequestDto.java

@@ -0,0 +1,12 @@
+package com.app.gamereview.dto.request;
+
+import lombok.Getter;
+
+@Getter
+public class VerifyResetCodeRequestDto {
+
+	private String resetCode;
+
+	private String userEmail;
+
+}

app/backend/src/main/java/com/app/gamereview/model/ResetCode.java

@@ -0,0 +1,60 @@
+package com.app.gamereview.model;
+
+import org.springframework.data.annotation.Id;
+import org.springframework.data.mongodb.core.index.Indexed;
+import org.springframework.data.mongodb.core.mapping.Document;
+import java.util.Date;
+
+@Document(collection = "resetCodes")
+public class ResetCode {
+
+	@Id
+	private String id;
+
+	public String getId() {
+		return id;
+	}
+
+	public void setId(String id) {
+		this.id = id;
+	}
+
+	public String getCode() {
+		return code;
+	}
+
+	public void setCode(String code) {
+		this.code = code;
+	}
+
+	public String getUserId() {
+		return userId;
+	}
+
+	public void setUser(String userId) {
+		this.userId = userId;
+	}
+
+	public Date getExpirationDate() {
+		return expirationDate;
+	}
+
+	public void setExpirationDate(Date expirationDate) {
+		this.expirationDate = expirationDate;
+	}
+
+	private String code;
+
+	@Indexed(unique = true) // Ensures a unique constraint on userId field
+	private String userId; // ID of the associated user
+
+	private Date expirationDate;
+
+	public ResetCode(String code, String userId, Date expirationDate) {
+
+		this.code = code;
+		this.userId = userId;
+		this.expirationDate = expirationDate;
+	}
+
+}

app/backend/src/main/java/com/app/gamereview/repository/ResetCodeRepository.java

@@ -0,0 +1,16 @@
+package com.app.gamereview.repository;
+
+import com.app.gamereview.model.ResetCode;
+import org.springframework.data.mongodb.repository.MongoRepository;
+
+import java.util.Optional;
+
+public interface ResetCodeRepository extends MongoRepository<ResetCode, String> {
+
+	ResetCode findByUserId(String userId);
+
+	Optional<ResetCode> findByCode(String code);
+
+	void deleteByUserId(String userId);
+
+}

app/backend/src/main/java/com/app/gamereview/repository/UserRepository.java

@@ -2,6 +2,7 @@
 
 import com.app.gamereview.model.User;
 import org.springframework.data.mongodb.repository.MongoRepository;
+import org.springframework.data.mongodb.repository.Query;
 
 import java.util.List;
 import java.util.Optional;
@@ -13,4 +14,7 @@ public interface UserRepository extends MongoRepository<User, String> {
 
 	Optional<User> findByEmailAndIsDeletedFalse(String email);
 
+	@Query("{ 'email' : ?0 }")
+	Optional<User> findByEmail(String email);
+
 }

app/backend/src/main/java/com/app/gamereview/service/EmailService.java

@@ -0,0 +1,25 @@
+package com.app.gamereview.service;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.mail.SimpleMailMessage;
+import org.springframework.mail.javamail.JavaMailSender;
+import org.springframework.stereotype.Service;
+
+@Service
+public class EmailService {
+
+	@Autowired
+	private JavaMailSender mailSender;
+
+	public void sendEmail(String toEmail, String subject, String body) {
+		SimpleMailMessage message = new SimpleMailMessage();
+		message.setFrom("[email protected]");
+		message.setTo(toEmail);
+		message.setText(body);
+		message.setSubject(subject);
+		mailSender.send(message);
+		System.out.println("Mail Send...");
+
+	}
+
+}

app/backend/src/main/java/com/app/gamereview/service/UserService.java

@@ -69,4 +69,10 @@ public Boolean deleteUserById(String id) {
 		return false;
 	}
 
+	public User getUserByEmail(String email) {
+		Optional<User> getResult = userRepository.findByEmail(email);
+
+		return getResult.orElse(null);
+	}
+
 }

app/backend/src/main/resources/.env.example

@@ -0,0 +1,10 @@
+MONGO_DATABASE=
+MONGO_USER=
+MONGO_PASSWORD=
+MONGO_CLUSTER=
+MAIL_HOST=
+MAIL_PORT=
+MAIL_USERNAME=
+MAIL_PASSWORD=
+MAIL_AUTH=
+MAIL_STARTTLS=

app/backend/src/main/resources/application.properties

@@ -1,2 +1,8 @@
 spring.data.mongodb.database=${MONGO_DATABASE}
 spring.data.mongodb.uri=mongodb+srv://${MONGO_USER}:${MONGO_PASSWORD}@${MONGO_CLUSTER}
+spring.mail.host=${MAIL_HOST}
+spring.mail.port=${MAIL_PORT}
+spring.mail.username=${MAIL_USERNAME}
+spring.mail.password=${MAIL_PASSWORD}
+spring.mail.properties.mail.smtp.auth=${MAIL_AUTH}
+spring.mail.properties.mail.smtp.starttls.enable=${MAIL_STARTTLS}

app/backend/target/classes/application.properties

@@ -1,2 +1,8 @@
 spring.data.mongodb.database=${MONGO_DATABASE}
 spring.data.mongodb.uri=mongodb+srv://${MONGO_USER}:${MONGO_PASSWORD}@${MONGO_CLUSTER}
+spring.mail.host=${MAIL_HOST}
+spring.mail.port=${MAIL_PORT}
+spring.mail.username=${MAIL_USERNAME}
+spring.mail.password=${MAIL_PASSWORD}
+spring.mail.properties.mail.smtp.auth=${MAIL_AUTH}
+spring.mail.properties.mail.smtp.starttls.enable=${MAIL_STARTTLS}