[FEAT] 이메일 중복 체크 API 구현

src/main/java/com/fav/daengnyang/domain/member/controller/MemberController.java

@@ -2,10 +2,12 @@
 
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fav.daengnyang.domain.member.service.MemberService;
+import com.fav.daengnyang.domain.member.service.dto.request.CheckRequest;
 import com.fav.daengnyang.domain.member.service.dto.request.CreatedRequest;
 import com.fav.daengnyang.domain.member.service.dto.request.LoginRequest;
 import com.fav.daengnyang.domain.member.service.dto.response.LoginResponse;
 import com.fav.daengnyang.domain.member.service.dto.response.MemberInfoResponse;
+import com.fav.daengnyang.domain.pet.service.dto.response.CheckResponse;
 import com.fav.daengnyang.global.auth.AuthService;
 import com.fav.daengnyang.global.auth.dto.MemberPrincipal;
 import com.fav.daengnyang.global.auth.utils.JWTProvider;
@@ -16,6 +18,8 @@
 import org.springframework.security.core.annotation.AuthenticationPrincipal;
 import org.springframework.web.bind.annotation.*;
 
+import java.util.HashMap;
+
 @RestController
 @RequestMapping("/members")
 @Slf4j
@@ -46,5 +50,13 @@ public SuccessResponse<MemberInfoResponse> getMemberInfo(@AuthenticationPrincipa
         MemberInfoResponse memberInfoResponse = memberService.getMemberInfo(memberPrincipal.getMemberId());
         return SuccessResponse.ok(memberInfoResponse);
     }
+
+    // 이메일 중복 체크
+    @PostMapping("/check")
+    public SuccessResponse<?> checkDuplicateEmail(@RequestBody CheckRequest checkRequest) throws JsonProcessingException {
+
+       CheckResponse response = memberService.checkDuplicateEmail(checkRequest.getEmail());
+       return SuccessResponse.ok(response);
+    }
 
 }

src/main/java/com/fav/daengnyang/domain/member/service/MemberService.java

@@ -9,6 +9,7 @@
 import com.fav.daengnyang.domain.member.service.dto.response.LoginResponse;
 import com.fav.daengnyang.domain.member.service.dto.response.MemberBankResponse;
 import com.fav.daengnyang.domain.member.service.dto.response.MemberInfoResponse;
+import com.fav.daengnyang.domain.pet.service.dto.response.CheckResponse;
 import com.fav.daengnyang.domain.target.repository.TargetRepository;
 import com.fav.daengnyang.global.auth.dto.MemberPrincipal;
 import com.fav.daengnyang.global.auth.utils.JWTProvider;
@@ -27,6 +28,7 @@
 import org.springframework.security.core.userdetails.UsernameNotFoundException;
 import org.springframework.security.crypto.password.PasswordEncoder;
 import org.springframework.stereotype.Service;
+import org.springframework.web.client.HttpClientErrorException;
 import org.springframework.web.client.RestTemplate;
 import com.fasterxml.jackson.databind.ObjectMapper;
 
@@ -55,6 +57,7 @@ public class MemberService implements UserDetailsService {
     public LoginResponse createMember(CreatedRequest createdRequest) throws JsonProcessingException {
         // 1. 금융 API 회원가입
         MemberBankResponse memberBankResponse = createMemberBank(createdRequest);
+        System.out.println("memberBankResponse: " + memberBankResponse);
         // 2. 예금 계좌 개설
         String depositAccount = createMemberAccount(memberBankResponse);
         // 3. 비밀번호 인코딩
@@ -81,6 +84,11 @@ public Member findByMemberId(Long id) {
                 .orElseThrow(() -> new CustomException(ErrorCode.USER_NOT_FOUND));
     }
 
+    // 이메일 중복 체크
+    public CheckResponse checkDuplicateEmail(String email) throws JsonProcessingException {
+        return checkMemberBank(email);
+    }
+
     @Override
     public UserDetails loadUserByUsername(String email) throws UsernameNotFoundException {
 
@@ -120,7 +128,6 @@ private MemberBankResponse createMemberBank(CreatedRequest createdRequest) throw
 
         log.info("회원 가입 API 결과: " + response.getBody());
         return objectMapper.readValue(response.getBody(), MemberBankResponse.class);
-
     }
 
     // 계좌 생성 API
@@ -195,4 +202,35 @@ public MemberInfoResponse getMemberInfo(Long memberId) {
                 .memberTarget(totalTargets)
                 .build();
     }
+
+    private CheckResponse checkMemberBank(String email) throws JsonProcessingException {
+        // 1. body 객체 생성
+        HashMap<String, String> body = new HashMap<>();
+        body.put("apiKey", apiKey);
+        body.put("userId", email);
+
+        // 2. HttpHeaders 설정
+        HttpHeaders headers = new HttpHeaders();
+        headers.setContentType(MediaType.APPLICATION_JSON);
+
+        // 3. HttpEntity 객체 생성
+        HttpEntity<Map<String, String>> requestEntity = new HttpEntity<>(body, headers);
+
+        // 4. 외부 API 호출
+        String url = "/member/search";
+        try{
+            ResponseEntity<String> response = restTemplate.postForEntity(url, requestEntity, String.class);
+            log.info("아이디 중복체크" + response.getBody());
+
+            return CheckResponse.createCheckResponse("이미 존재하는 이메일입니다.");
+
+        } catch (HttpClientErrorException e) {
+            log.info("아이디 중복체크" + e.getResponseBodyAsString());
+           CheckResponse checkResponse = objectMapper.readValue(e.getResponseBodyAsString(), CheckResponse.class);
+           if(checkResponse.getResponseCode().equals("E4003")){
+               checkResponse.updateCheckResponse("사용가능한 이메일입니다.");
+           }
+           return checkResponse;
+        }
+    }
 }

src/main/java/com/fav/daengnyang/domain/member/service/dto/request/CheckRequest.java

@@ -0,0 +1,15 @@
+package com.fav.daengnyang.domain.member.service.dto.request;
+
+import lombok.AccessLevel;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import org.apache.logging.log4j.core.config.plugins.validation.constraints.NotBlank;
+
+@Getter
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+@AllArgsConstructor
+public class CheckRequest {
+    @NotBlank
+    String email;
+}

src/main/java/com/fav/daengnyang/domain/pet/service/dto/response/CheckResponse.java

@@ -0,0 +1,29 @@
+package com.fav.daengnyang.domain.pet.service.dto.response;
+
+import lombok.*;
+import org.hibernate.annotations.Check;
+
+@Getter
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+@ToString
+public class CheckResponse {
+
+    private String responseCode;
+    private String responseMessage;
+
+    @Builder
+    private CheckResponse(String responseCode, String responseMessage) {
+        this.responseCode = responseCode;
+        this.responseMessage = responseMessage;
+    }
+
+    public static CheckResponse createCheckResponse(String responseMessage) {
+        return CheckResponse.builder()
+                .responseMessage(responseMessage)
+                .build();
+    }
+
+    public void  updateCheckResponse(String responseMessage){
+        this.responseMessage = responseMessage;
+    }
+}

src/main/java/com/fav/daengnyang/global/auth/filter/JwtFilter.java

@@ -38,7 +38,7 @@ public void doFilter(ServletRequest servletRequest, ServletResponse servletRespo
         // 로그인, 회원가입은 필터를 적용하지 않음
         String requestURI = request.getRequestURI();
         logger.info("requestURI : " + requestURI);
-        if (requestURI.equals("/api/v1/members") || requestURI.equals("/api/v1/members/login")) {
+        if (requestURI.equals("/api/v1/members") || requestURI.equals("/api/v1/members/login") || requestURI.equals("/api/v1/members/check")) {
             filterChain.doFilter(request, servletResponse);
             return;
         }
@@ -48,12 +48,11 @@ public void doFilter(ServletRequest servletRequest, ServletResponse servletRespo
         if (StringUtils.hasText(jwt) && jwtProvider.validateToken(jwt)) {
             Long memberId = jwtProvider.getMemberId(jwt);
             String userKey = jwtProvider.getUserKey(jwt);
-            log.info("0");
+
             Member member = memberService.findByMemberId(memberId);
 
-            log.info("1");
             UserDetails userDetails = MemberPrincipal.createMemberAuthority(member, userKey);
-            log.info("3");
+
             UsernamePasswordAuthenticationToken authentication = new UsernamePasswordAuthenticationToken(userDetails, null, userDetails.getAuthorities());
             SecurityContextHolder.getContext().setAuthentication(authentication);
         }

src/main/java/com/fav/daengnyang/global/config/SecurityConfig.java

@@ -41,7 +41,7 @@ public SecurityFilterChain securityFilterChain(HttpSecurity http, MemberService
         return http.cors(Customizer.withDefaults())
                 .csrf((csrf) -> csrf.disable())
                 .authorizeHttpRequests((authorize) -> authorize
-                                .requestMatchers("/members", "/members/login").permitAll()
+                                .requestMatchers("/members", "/members/login", "/members/check").permitAll()
                         .anyRequest().authenticated())
                 .sessionManagement((session) -> session.sessionCreationPolicy(SessionCreationPolicy.STATELESS))
                 .formLogin(httpSecurityFormLoginConfigurer -> httpSecurityFormLoginConfigurer.disable()) // 로그인 폼 미사용