✨ [feature] 카카오 로그인 구현

build.gradle

@@ -73,6 +73,8 @@ dependencies {
 
 	// AOP
 	implementation 'org.springframework.boot:spring-boot-starter-aop'
+
+	implementation 'org.springframework.boot:spring-boot-starter-webflux'
 }
 
 tasks.named('test') {

src/main/java/com/sayup/SayUp/config/SecurityConfig.java

@@ -37,7 +37,8 @@ public SecurityFilterChain securityFilterChain(HttpSecurity http) throws Excepti
         final String[] PUBLIC_URLS = {
                 "/api/auth/**",      // 인증 관련 API
                 "/swagger-ui/**",    // Swagger UI
-                "/v3/api-docs/**"    // OpenAPI 문서
+                "/v3/api-docs/**",   // OpenAPI 문서
+                "/callback/**"       // 카카오 로그인
         };
 
         return http

src/main/java/com/sayup/SayUp/controller/AuthController.java

@@ -4,19 +4,19 @@
 import com.sayup.SayUp.dto.AuthResponseDTO;
 import com.sayup.SayUp.service.AuthService;
 import jakarta.validation.Valid;
+import lombok.AllArgsConstructor;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.*;
 
+import java.util.Map;
+
 @RestController
 @RequestMapping("/api/auth")
+@AllArgsConstructor
 public class AuthController {
     private final AuthService authService;
 
-    public AuthController(AuthService authService) {
-        this.authService = authService;
-    }
-
     /**
      * 사용자 회원가입 처리
      * @param authRequestDTO 사용자 이메일 및 비밀번호 정보

src/main/java/com/sayup/SayUp/entity/User.java

@@ -1,6 +1,7 @@
 package com.sayup.SayUp.entity;
 
 import jakarta.persistence.*;
+import lombok.Builder;
 import lombok.Getter;
 import lombok.Setter;
 
@@ -13,6 +14,9 @@
 @Getter
 @Setter
 public class User {
+    public User() {
+    }
+
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
     private Long userId;
@@ -31,6 +35,8 @@ public class User {
     @Column(nullable = false, updatable = false)
     private LocalDateTime createdAt = LocalDateTime.now();
 
+    private String role;
+
     @Override
     public boolean equals(Object obj) {
         if (this == obj) return true;

src/main/java/com/sayup/SayUp/kakao/controller/KakaoLoginController.java

@@ -0,0 +1,44 @@
+package com.sayup.SayUp.kakao.controller;
+
+import com.sayup.SayUp.dto.AuthResponseDTO;
+import com.sayup.SayUp.kakao.dto.KakaoUserInfoResponseDto;
+import com.sayup.SayUp.kakao.service.KakaoService;
+import com.sayup.SayUp.security.JwtTokenProvider;
+import com.sayup.SayUp.service.AuthService;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.io.IOException;
+
+@Slf4j
+@RestController
+@RequiredArgsConstructor
+@RequestMapping("")
+public class KakaoLoginController {
+
+    private final KakaoService kakaoService;
+    private final JwtTokenProvider jwtTokenProvider;
+    private final AuthService authService;
+
+    @GetMapping("/callback")
+    public ResponseEntity<?> callback(@RequestParam("code") String code) throws IOException {
+        String accessToken = kakaoService.getAccessTokenFromKakao(code);
+
+        KakaoUserInfoResponseDto userInfo = kakaoService.getUserInfo(accessToken);
+
+        String email = null;
+        String jwt = null;
+        if (userInfo.getKakaoAccount() != null) {
+            email = userInfo.getKakaoAccount().getEmail();
+            authService.loadOrCreateUser(email);
+            jwt = jwtTokenProvider.createTokenFromEmail(email);
+        }
+
+        return ResponseEntity.ok(new AuthResponseDTO(jwt, email));
+    }
+}

src/main/java/com/sayup/SayUp/kakao/controller/KakaoLoginPageController.java

@@ -0,0 +1,26 @@
+package com.sayup.SayUp.kakao.controller;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+
+@Controller
+@RequestMapping("/login")
+public class KakaoLoginPageController {
+
+    @Value("${kakao.client_id}")
+    private String client_id;
+
+    @Value("${kakao.redirect_uri}")
+    private String redirect_uri;
+
+    @GetMapping("/page")
+    public String loginPage(Model model) {
+        String location = "https://kauth.kakao.com/oauth/authorize?response_type=code&client_id="+client_id+"&redirect_uri="+redirect_uri;
+        model.addAttribute("location", location);
+
+        return "login";
+    }
+}

src/main/java/com/sayup/SayUp/kakao/dto/KakaoLoginDto.java

@@ -0,0 +1,14 @@
+package com.sayup.SayUp.kakao.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Getter;
+
+@AllArgsConstructor
+@Builder
+@Getter
+public class KakaoLoginDto {
+
+    public String accessToken;
+    public String refreshToken;
+}

src/main/java/com/sayup/SayUp/kakao/dto/KakaoTokenResponseDto.java

@@ -0,0 +1,27 @@
+package com.sayup.SayUp.kakao.dto;
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Getter
+@NoArgsConstructor //역직렬화를 위한 기본 생성자
+@JsonIgnoreProperties(ignoreUnknown = true)
+public class KakaoTokenResponseDto {
+
+    @JsonProperty("token_type")
+    public String tokenType;
+    @JsonProperty("access_token")
+    public String accessToken;
+    @JsonProperty("id_token")
+    public String idToken;
+    @JsonProperty("expires_in")
+    public Integer expiresIn;
+    @JsonProperty("refresh_token")
+    public String refreshToken;
+    @JsonProperty("refresh_token_expires_in")
+    public Integer refreshTokenExpiresIn;
+    @JsonProperty("scope")
+    public String scope;
+}

src/main/java/com/sayup/SayUp/kakao/dto/KakaoUserInfoResponseDto.java

@@ -0,0 +1,190 @@
+package com.sayup.SayUp.kakao.dto;
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+import java.util.Date;
+import java.util.HashMap;
+
+@Getter
+@NoArgsConstructor //역직렬화를 위한 기본 생성자
+@JsonIgnoreProperties(ignoreUnknown = true)
+public class KakaoUserInfoResponseDto {
+
+    //회원 번호
+    @JsonProperty("id")
+    public Long id;
+
+    //자동 연결 설정을 비활성화한 경우만 존재.
+    //true : 연결 상태, false : 연결 대기 상태
+    @JsonProperty("has_signed_up")
+    public Boolean hasSignedUp;
+
+    //서비스에 연결 완료된 시각. UTC
+    @JsonProperty("connected_at")
+    public Date connectedAt;
+
+    //카카오싱크 간편가입을 통해 로그인한 시각. UTC
+    @JsonProperty("synched_at")
+    public Date synchedAt;
+
+    //사용자 프로퍼티
+    @JsonProperty("properties")
+    public HashMap<String, String> properties;
+
+    //카카오 계정 정보
+    @JsonProperty("kakao_account")
+    public KakaoAccount kakaoAccount;
+
+    //uuid 등 추가 정보
+    @JsonProperty("for_partner")
+    public Partner partner;
+
+    @Getter
+    @NoArgsConstructor
+    @JsonIgnoreProperties(ignoreUnknown = true)
+    public class KakaoAccount {
+
+        //프로필 정보 제공 동의 여부
+        @JsonProperty("profile_needs_agreement")
+        public Boolean isProfileAgree;
+
+        //닉네임 제공 동의 여부
+        @JsonProperty("profile_nickname_needs_agreement")
+        public Boolean isNickNameAgree;
+
+        //프로필 사진 제공 동의 여부
+        @JsonProperty("profile_image_needs_agreement")
+        public Boolean isProfileImageAgree;
+
+        //사용자 프로필 정보
+        @JsonProperty("profile")
+        public Profile profile;
+
+        //이름 제공 동의 여부
+        @JsonProperty("name_needs_agreement")
+        public Boolean isNameAgree;
+
+        //카카오계정 이름
+        @JsonProperty("name")
+        public String name;
+
+        //이메일 제공 동의 여부
+        @JsonProperty("email_needs_agreement")
+        public Boolean isEmailAgree;
+
+        //이메일이 유효 여부
+        // true : 유효한 이메일, false : 이메일이 다른 카카오 계정에 사용돼 만료
+        @JsonProperty("is_email_valid")
+        public Boolean isEmailValid;
+
+        //이메일이 인증 여부
+        //true : 인증된 이메일, false : 인증되지 않은 이메일
+        @JsonProperty("is_email_verified")
+        public Boolean isEmailVerified;
+
+        //카카오계정 대표 이메일
+        @JsonProperty("email")
+        public String email;
+
+        //연령대 제공 동의 여부
+        @JsonProperty("age_range_needs_agreement")
+        public Boolean isAgeAgree;
+
+        //연령대
+        //참고 https://developers.kakao.com/docs/latest/ko/kakaologin/rest-api#req-user-info
+        @JsonProperty("age_range")
+        public String ageRange;
+
+        //출생 연도 제공 동의 여부
+        @JsonProperty("birthyear_needs_agreement")
+        public Boolean isBirthYearAgree;
+
+        //출생 연도 (YYYY 형식)
+        @JsonProperty("birthyear")
+        public String birthYear;
+
+        //생일 제공 동의 여부
+        @JsonProperty("birthday_needs_agreement")
+        public Boolean isBirthDayAgree;
+
+        //생일 (MMDD 형식)
+        @JsonProperty("birthday")
+        public String birthDay;
+
+        //생일 타입
+        // SOLAR(양력) 혹은 LUNAR(음력)
+        @JsonProperty("birthday_type")
+        public String birthDayType;
+
+        //성별 제공 동의 여부
+        @JsonProperty("gender_needs_agreement")
+        public Boolean isGenderAgree;
+
+        //성별
+        @JsonProperty("gender")
+        public String gender;
+
+        //전화번호 제공 동의 여부
+        @JsonProperty("phone_number_needs_agreement")
+        public Boolean isPhoneNumberAgree;
+
+        //전화번호
+        //국내 번호인 경우 +82 00-0000-0000 형식
+        @JsonProperty("phone_number")
+        public String phoneNumber;
+
+        //CI 동의 여부
+        @JsonProperty("ci_needs_agreement")
+        public Boolean isCIAgree;
+
+        //CI, 연계 정보
+        @JsonProperty("ci")
+        public String ci;
+
+        //CI 발급 시각, UTC
+        @JsonProperty("ci_authenticated_at")
+        public Date ciCreatedAt;
+
+        @Getter
+        @NoArgsConstructor
+        @JsonIgnoreProperties(ignoreUnknown = true)
+        public class Profile {
+
+            //닉네임
+            @JsonProperty("nickname")
+            public String nickName;
+
+            //프로필 미리보기 이미지 URL
+            @JsonProperty("thumbnail_image_url")
+            public String thumbnailImageUrl;
+
+            //프로필 사진 URL
+            @JsonProperty("profile_image_url")
+            public String profileImageUrl;
+
+            //프로필 사진 URL 기본 프로필인지 여부
+            //true : 기본 프로필, false : 사용자 등록
+            @JsonProperty("is_default_image")
+            public String isDefaultImage;
+
+            //닉네임이 기본 닉네임인지 여부
+            //true : 기본 닉네임, false : 사용자 등록
+            @JsonProperty("is_default_nickname")
+            public Boolean isDefaultNickName;
+
+        }
+    }
+
+    @Getter
+    @NoArgsConstructor
+    @JsonIgnoreProperties(ignoreUnknown = true)
+    public class Partner {
+        //고유 ID
+        @JsonProperty("uuid")
+        public String uuid;
+    }
+
+}