[FEAT]: 인증 인가 구현

back/src/main/java/com/back/domain/user/controller/UserAuthController.java

@@ -0,0 +1,79 @@
+package com.back.domain.user.controller;
+
+import com.back.domain.user.dto.LoginRequest;
+import com.back.domain.user.dto.SignupRequest;
+import com.back.domain.user.dto.UserResponse;
+import com.back.domain.user.entity.User;
+import com.back.domain.user.service.GuestService;
+import com.back.domain.user.service.UserService;
+import com.back.global.common.ApiResponse;
+import com.back.global.security.CustomUserDetails;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+import jakarta.validation.Valid;
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.HttpStatus;
+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.annotation.AuthenticationPrincipal;
+import org.springframework.security.core.context.SecurityContextHolder;
+import org.springframework.security.web.context.HttpSessionSecurityContextRepository;
+import org.springframework.web.bind.annotation.*;
+
+@RestController
+@RequestMapping("/api/v1/users-auth")
+@RequiredArgsConstructor
+public class UserAuthController {
+
+    private final UserService userService;
+    private final AuthenticationManager authenticationManager;
+    private final GuestService guestService;
+
+    @PostMapping("/signup")
+    public ResponseEntity<ApiResponse<UserResponse>> signup(@Valid @RequestBody SignupRequest req){
+        User saved = userService.signup(req);
+        return ResponseEntity.status(HttpStatus.CREATED)
+                .body(ApiResponse.success(UserResponse.from(saved), "성공적으로 생성되었습니다."));
+    }
+
+    @PostMapping("/login")
+    public ResponseEntity<ApiResponse<UserResponse>> login(
+            @Valid @RequestBody LoginRequest req,
+            HttpServletRequest request,
+            HttpServletResponse response)
+    {
+        Authentication auth = authenticationManager.authenticate(
+                new UsernamePasswordAuthenticationToken(req.email(), req.password()));
+        SecurityContextHolder.getContext().setAuthentication(auth);
+
+        request.getSession(true);
+        new HttpSessionSecurityContextRepository()
+                .saveContext(SecurityContextHolder.getContext(), request, response);
+
+        CustomUserDetails cud = (CustomUserDetails) auth.getPrincipal();
+        return ResponseEntity.ok(ApiResponse.success(UserResponse.from(cud.getUser()), "로그인 성공"));
+    }
+
+    @PostMapping("/guest")
+    public ResponseEntity<ApiResponse<UserResponse>> guestLogin(HttpServletRequest request){
+        User savedGuest = guestService.createAndSaveGuest();
+
+        CustomUserDetails cud = new CustomUserDetails(savedGuest);
+        Authentication auth = new UsernamePasswordAuthenticationToken(cud, null, cud.getAuthorities());
+        SecurityContextHolder.getContext().setAuthentication(auth);
+
+        request.getSession(true);
+
+        return ResponseEntity.ok(ApiResponse.success(UserResponse.from(savedGuest), "게스트 로그인 성공"));
+    }
+
+    @GetMapping("/me")
+    public ResponseEntity<ApiResponse<UserResponse>> me(@AuthenticationPrincipal CustomUserDetails cud) {
+        if (cud == null) {
+            return ResponseEntity.ok(ApiResponse.success(null, "anonymous"));
+        }
+        return ResponseEntity.ok(ApiResponse.success(UserResponse.from(cud.getUser()), "authenticated"));
+    }
+}

back/src/main/java/com/back/domain/user/dto/LoginRequest.java

@@ -0,0 +1,15 @@
+package com.back.domain.user.dto;
+
+import jakarta.validation.constraints.Email;
+import jakarta.validation.constraints.NotBlank;
+
+/**
+ * 사용자 로그인 요청 시 필요한 정보를 담는 DTO 클래스.
+ * 로그인 ID와 비밀번호를 포함합니다.
+ */
+public record LoginRequest(
+        @Email @NotBlank(message = "로그인 아이디는 필수 입력 값입니다.")
+        String email,
+        @NotBlank(message = "비밀번호는 필수 입력 값입니다.")
+        String password
+) {}

back/src/main/java/com/back/domain/user/dto/SignupRequest.java

@@ -0,0 +1,33 @@
+package com.back.domain.user.dto;
+
+import com.fasterxml.jackson.annotation.JsonFormat;
+import jakarta.validation.constraints.*;
+
+import java.time.LocalDateTime;
+
+/**
+ * 사용자 회원가입 요청 시 필요한 정보를 담는 DTO 클래스.
+ * 로그인 ID, 이메일, 비밀번호, 닉네임, 생년월일, 성별, MBTI, 가치관 등을 포함합니다.
+ */
+public record SignupRequest(
+
+        @NotBlank(message = "이메일은 필수 입력 값입니다.")
+        @Email(message = "이메일 형식에 맞지 않습니다.")
+        String email,
+
+        @NotBlank(message = "비밀번호는 필수 입력 값입니다.")
+        @Pattern(regexp="(?=.*[0-9])(?=.*[a-zA-Z])(?=.*\\W)(?=\\S+$).{8,20}",
+                message="비밀번호는 영문, 숫자, 특수기호 포함 8~20자여야 합니다.")
+        String password,
+
+        @NotBlank(message = "이름은 필수 입력 값입니다.")
+        String username,
+
+        @NotBlank(message = "닉네임은 필수 입력 값입니다.")
+        String nickname,
+
+        @NotNull(message = "생년월일은 필수 입력 값입니다.")
+        @Past(message = "생년월일은 과거 날짜여야 합니다.")
+        @JsonFormat(pattern = "yyyy-MM-dd'T'HH:mm:ss") // JSON 바인딩용(폼 바인딩이면 @DateTimeFormat)
+        LocalDateTime birthdayAt
+) {}

back/src/main/java/com/back/domain/user/dto/UserResponse.java

@@ -0,0 +1,24 @@
+package com.back.domain.user.dto;
+
+import com.back.domain.user.entity.Role;
+import com.back.domain.user.entity.User;
+
+import java.time.LocalDateTime;
+
+public record UserResponse(
+        Long id,
+        String email,
+        String username,
+        Role role,
+        String nickname,
+        LocalDateTime birthdayAt,
+        String authProvider
+) {
+    public static UserResponse from(User u) {
+        return new UserResponse(
+                u.getId(), u.getEmail(), u.getUsername(),
+                u.getRole(), u.getNickname(), u.getBirthdayAt(),
+                u.getAuthProvider() == null ? "" : u.getAuthProvider().name()
+        );
+    }
+}

back/src/main/java/com/back/domain/user/entity/AuthProvider.java

@@ -5,5 +5,5 @@
  * 일반 로그인, 소셜 로그인(Google, Kakao, Naver, GitHub, Apple), 게스트 로그인 등을 포함합니다.
  */
 public enum AuthProvider {
-    LOCAL, GOOGLE, KAKAO, NAVER, GITHUB, APPLE, GUEST
+    LOCAL, GOOGLE, GITHUB, GUEST
 }