feat: 소셜 로그인용 DTO 추가

Author: larama-C

src/main/java/com/back/web7_9_codecrete_be/domain/auth/dto/kakao/KakaoTokenResponse.java

@@ -0,0 +1,14 @@
+package com.back.web7_9_codecrete_be.domain.auth.dto.kakao;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import lombok.Getter;
+
+@Getter
+public class KakaoTokenResponse {
+
+    @JsonProperty("access_token")
+    private String accessToken;
+
+    @JsonProperty("expires_in")
+    private int expiresIn;
+}

src/main/java/com/back/web7_9_codecrete_be/domain/auth/dto/kakao/KakaoUserInfo.java

@@ -0,0 +1,13 @@
+package com.back.web7_9_codecrete_be.domain.auth.dto.kakao;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+
+@Getter
+@AllArgsConstructor
+public class KakaoUserInfo {
+    private String socialId;
+    private String email;
+    private String nickname;
+    private String profileImageUrl;
+}

src/main/java/com/back/web7_9_codecrete_be/domain/auth/dto/kakao/KakaoUserResponse.java

@@ -0,0 +1,36 @@
+package com.back.web7_9_codecrete_be.domain.auth.dto.kakao;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import lombok.Getter;
+
+@Getter
+public class KakaoUserResponse {
+
+    private Long id;
+
+    @JsonProperty("kakao_account")
+    private KakaoAccount kakaoAccount;
+
+    public KakaoUserInfo toUserInfo() {
+        return new KakaoUserInfo(
+                String.valueOf(id),
+                kakaoAccount.getEmail(),
+                kakaoAccount.getProfile().getNickname(),
+                kakaoAccount.getProfile().getProfileImageUrl()
+        );
+    }
+
+    @Getter
+    public static class KakaoAccount {
+        private String email;
+        private Profile profile;
+    }
+
+    @Getter
+    public static class Profile {
+        private String nickname;
+
+        @JsonProperty("profile_image_url")
+        private String profileImageUrl;
+    }
+}