feat: add auth controller with payloads

src/main/java/dev/gfxv/blps/controller/AuthController.java

@@ -0,0 +1,95 @@
+package dev.gfxv.blps.controller;
+
+import dev.gfxv.blps.entity.Role;
+import dev.gfxv.blps.entity.User;
+import dev.gfxv.blps.payload.request.LoginRequest;
+import dev.gfxv.blps.payload.request.RegisterRequest;
+import dev.gfxv.blps.payload.response.JwtResponse;
+import dev.gfxv.blps.security.JwtUtils;
+import dev.gfxv.blps.repository.RoleRepository;
+import dev.gfxv.blps.repository.UserRepository;
+import dev.gfxv.blps.security.UserDetailsImpl;
+import lombok.AccessLevel;
+import lombok.AllArgsConstructor;
+import lombok.experimental.FieldDefaults;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.ResponseEntity;
+import org.springframework.security.authentication.AuthenticationManager;
+import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
+import org.springframework.security.core.Authentication;
+import org.springframework.security.core.GrantedAuthority;
+import org.springframework.security.core.context.SecurityContextHolder;
+import org.springframework.security.crypto.password.PasswordEncoder;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.Collections;
+import java.util.List;
+import java.util.stream.Collectors;
+
+@RestController
+@RequestMapping("/api/auth")
+@FieldDefaults(level = AccessLevel.PRIVATE, makeFinal = true)
+public class AuthController {
+
+    AuthenticationManager authenticationManager;
+    UserRepository userRepository;
+    RoleRepository roleRepository;
+    PasswordEncoder passwordEncoder;
+    JwtUtils jwtUtils;
+
+    @Autowired
+    public AuthController(
+            AuthenticationManager authenticationManager,
+            UserRepository userRepository,
+            RoleRepository roleRepository,
+            PasswordEncoder passwordEncoder,
+            JwtUtils jwtUtils
+    ) {
+        this.authenticationManager = authenticationManager;
+        this.userRepository = userRepository;
+        this.roleRepository = roleRepository;
+        this.passwordEncoder = passwordEncoder;
+        this.jwtUtils = jwtUtils;
+    }
+
+    @PostMapping("/register")
+    public ResponseEntity<?> registerUser(@RequestBody RegisterRequest registerRequest) {
+        if (userRepository.existsByUsername(registerRequest.getUsername())) {
+            return ResponseEntity.badRequest().body("Error: Username is already taken!");
+        }
+
+        if (userRepository.existsByEmail(registerRequest.getEmail())) {
+            return ResponseEntity.badRequest().body("Error: Email is already in use!");
+        }
+
+        User user = new User();
+        user.setUsername(registerRequest.getUsername());
+        user.setEmail(registerRequest.getEmail());
+        user.setPassword(passwordEncoder.encode(registerRequest.getPassword()));
+
+        Role userRole = roleRepository.findByName("ROLE_USER")
+                .orElseThrow(() -> new RuntimeException("Error: Role is not found."));
+        user.setRoles(Collections.singleton(userRole));
+
+        userRepository.save(user);
+
+        return ResponseEntity.ok("User registered successfully!");
+    }
+
+    @PostMapping("/login")
+    public ResponseEntity<?> authenticateUser(@RequestBody LoginRequest loginRequest) {
+        Authentication authentication = authenticationManager.authenticate(
+                new UsernamePasswordAuthenticationToken(loginRequest.getUsername(), loginRequest.getPassword()));
+
+        SecurityContextHolder.getContext().setAuthentication(authentication);
+
+        String jwt = jwtUtils.generateJwtToken(authentication);
+
+        UserDetailsImpl userDetails = (UserDetailsImpl) authentication.getPrincipal();
+        List<String> roles = userDetails.getAuthorities().stream()
+                .map(GrantedAuthority::getAuthority)
+                .collect(Collectors.toList());
+
+        return ResponseEntity.ok(new JwtResponse(jwt, userDetails.getUsername(), roles));
+    }
+}

src/main/java/dev/gfxv/blps/payload/request/LoginRequest.java

@@ -0,0 +1,27 @@
+package dev.gfxv.blps.payload.request;
+
+import lombok.AccessLevel;
+import lombok.Data;
+import lombok.experimental.FieldDefaults;
+
+@FieldDefaults(level = AccessLevel.PRIVATE)
+public class LoginRequest {
+    String username;
+    String password;
+
+    public String getUsername() {
+        return username;
+    }
+
+    public void setUsername(String username) {
+        this.username = username;
+    }
+
+    public String getPassword() {
+        return password;
+    }
+
+    public void setPassword(String password) {
+        this.password = password;
+    }
+}

src/main/java/dev/gfxv/blps/payload/request/RegisterRequest.java

@@ -0,0 +1,36 @@
+package dev.gfxv.blps.payload.request;
+
+import lombok.AccessLevel;
+import lombok.Data;
+import lombok.experimental.FieldDefaults;
+
+@FieldDefaults(level = AccessLevel.PRIVATE)
+public class RegisterRequest {
+    String username;
+    String email;
+    String password;
+
+    public String getUsername() {
+        return username;
+    }
+
+    public void setUsername(String username) {
+        this.username = username;
+    }
+
+    public String getEmail() {
+        return email;
+    }
+
+    public void setEmail(String email) {
+        this.email = email;
+    }
+
+    public String getPassword() {
+        return password;
+    }
+
+    public void setPassword(String password) {
+        this.password = password;
+    }
+}

src/main/java/dev/gfxv/blps/payload/response/JwtResponse.java

@@ -0,0 +1,54 @@
+package dev.gfxv.blps.payload.response;
+
+import lombok.AccessLevel;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.experimental.FieldDefaults;
+
+import java.util.List;
+
+@FieldDefaults(level = AccessLevel.PRIVATE)
+public class JwtResponse {
+    String token;
+    String type = "Bearer";
+    String username;
+    List<String> roles;
+
+    public JwtResponse(String token, String username, List<String> roles) {
+        this.token = token;
+        this.username = username;
+        this.roles = roles;
+    }
+
+    public String getToken() {
+        return token;
+    }
+
+    public void setToken(String token) {
+        this.token = token;
+    }
+
+    public String getType() {
+        return type;
+    }
+
+    public void setType(String type) {
+        this.type = type;
+    }
+
+    public String getUsername() {
+        return username;
+    }
+
+    public void setUsername(String username) {
+        this.username = username;
+    }
+
+    public List<String> getRoles() {
+        return roles;
+    }
+
+    public void setRoles(List<String> roles) {
+        this.roles = roles;
+    }
+}