feat: 소셜로그인 API 구현 (#16)

src/main/java/com/gdsc/hearo/domain/oauth/controller/OauthController.java

@@ -0,0 +1,45 @@
+package com.gdsc.hearo.domain.oauth.controller;
+
+import com.gdsc.hearo.domain.member.dto.LoginResponseDto;
+import com.gdsc.hearo.domain.member.entity.Member;
+import com.gdsc.hearo.domain.oauth.dto.GoogleProfile;
+import com.gdsc.hearo.domain.oauth.service.OauthService;
+import com.gdsc.hearo.global.common.BaseException;
+import com.gdsc.hearo.global.common.BaseResponse;
+import com.gdsc.hearo.global.common.BaseResponseStatus;
+import com.gdsc.hearo.global.security.JwtUtil;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.web.bind.annotation.*;
+
+@RestController
+@CrossOrigin
+@RequiredArgsConstructor
+@RequestMapping(value = "/auth")
+@Slf4j
+public class OauthController {
+
+    private final OauthService oauthService;
+    private final JwtUtil jwtUtil;
+
+    @GetMapping(value = "/google")
+    public void socialLoginType() {
+        oauthService.request();
+    }
+    @GetMapping(value = "/google/callback")
+    public BaseResponse<?> googleLogin(@RequestParam(name = "code") String code) {
+
+        try {
+            GoogleProfile googleProfile = oauthService.requestGoogleProfile(code);
+            Member member = oauthService.googleLogin(googleProfile);
+
+            String accessToken = jwtUtil.createAccessToken(member.getLoginId());
+            String refreshToken = jwtUtil.createRefreshToken(member.getLoginId());
+
+            LoginResponseDto loginResponseDto = new LoginResponseDto(accessToken, refreshToken);
+            return new BaseResponse<>(BaseResponseStatus.SUCCESS, loginResponseDto);
+        } catch (BaseException e) {
+            return new BaseResponse<>(e.getStatus());
+        }
+    }
+}

src/main/java/com/gdsc/hearo/domain/oauth/service/OauthService.java

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+package com.gdsc.hearo.domain.oauth.service;
+
+import com.gdsc.hearo.domain.member.entity.Member;
+import com.gdsc.hearo.domain.member.repository.MemberRepository;
+import com.gdsc.hearo.domain.oauth.dto.GoogleOAuthToken;
+import com.gdsc.hearo.domain.oauth.dto.GoogleProfile;
+import com.gdsc.hearo.domain.oauth.service.social.GoogleOauth;
+import com.gdsc.hearo.global.common.BaseException;
+import com.gdsc.hearo.global.common.BaseResponseStatus;
+import jakarta.servlet.http.HttpServletResponse;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+
+import java.io.IOException;
+
+@Service
+@RequiredArgsConstructor
+public class OauthService {
+
+    private final GoogleOauth googleOauth;
+    private final HttpServletResponse response;
+    private final MemberRepository memberRepository;
+
+    public void request() {
+        String redirectURL = googleOauth.getOauthRedirectURL();
+        try {
+            response.sendRedirect(redirectURL);
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+
+    public GoogleProfile requestGoogleProfile(String code) {
+        GoogleOAuthToken googleOAuthToken = googleOauth.requestAccessToken(code);
+        return googleOauth.requestGoogleProfile(googleOAuthToken);
+    }
+
+    public Member googleLogin(GoogleProfile googleProfile) throws BaseException {
+        String email = googleProfile.getEmail();
+        String googleId = googleProfile.getId();
+        String username = googleProfile.getName();
+
+        Member member = memberRepository.findByLoginId(email);
+
+        if (member != null) {
+            throw new BaseException(BaseResponseStatus.DUPICATE_USER_ID);
+        }
+        Member newMember = Member.builder()
+                .username(username)
+                .loginId(email)
+                .GoogleId(googleId)
+                .loginType(Member.LoginType.GOOGLE)
+                .build();
+
+        memberRepository.save(newMember);
+
+        return newMember;
+    }
+}

src/main/java/com/gdsc/hearo/domain/oauth/service/social/GoogleOauth.java

@@ -0,0 +1,106 @@
+package com.gdsc.hearo.domain.oauth.service.social;
+
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.JsonMappingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.gdsc.hearo.domain.oauth.dto.GoogleOAuthToken;
+import com.gdsc.hearo.domain.oauth.dto.GoogleProfile;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.http.*;
+import org.springframework.stereotype.Component;
+import org.springframework.util.MultiValueMap;
+import org.springframework.web.client.RestTemplate;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.stream.Collectors;
+
+@Component
+@RequiredArgsConstructor
+@Slf4j
+public class GoogleOauth {
+
+    @Value("${spring.google.url}")
+    private String GOOGLE_SNS_BASE_URL;
+    @Value("${spring.google.client-id}")
+    private String GOOGLE_SNS_CLIENT_ID;
+    @Value("${spring.google.callback}")
+    private String GOOGLE_SNS_CALLBACK_URL;
+    @Value("${spring.google.secret}")
+    private String GOOGLE_SNS_CLIENT_SECRET;
+    @Value("${spring.google.token}")
+    private String GOOGLE_SNS_TOKEN_BASE_URL;
+
+    public String getOauthRedirectURL() {
+        Map<String, Object> params = new HashMap<>();
+        params.put("scope", "profile email");
+        params.put("response_type", "code");
+        params.put("client_id", GOOGLE_SNS_CLIENT_ID);
+        params.put("redirect_uri", GOOGLE_SNS_CALLBACK_URL);
+
+        String parameterString = params.entrySet().stream()
+                .map(x -> x.getKey() + "=" + x.getValue())
+                .collect(Collectors.joining("&"));
+
+        return GOOGLE_SNS_BASE_URL + "?" + parameterString;
+    }
+
+    public GoogleOAuthToken requestAccessToken(String code) {
+        RestTemplate restTemplate = new RestTemplate();
+        ObjectMapper objectMapper = new ObjectMapper();
+        GoogleOAuthToken oAuthToken = null;
+
+        Map<String, Object> params = new HashMap<>();
+        params.put("code", code);
+        params.put("client_id", GOOGLE_SNS_CLIENT_ID);
+        params.put("client_secret", GOOGLE_SNS_CLIENT_SECRET);
+        params.put("redirect_uri", GOOGLE_SNS_CALLBACK_URL);
+        params.put("grant_type", "authorization_code");
+
+        ResponseEntity<String> response =
+                restTemplate.postForEntity(GOOGLE_SNS_TOKEN_BASE_URL, params, String.class);
+
+        try {
+            oAuthToken = objectMapper.readValue(response.getBody(), GoogleOAuthToken.class);
+        } catch (JsonMappingException e) {
+            throw new RuntimeException(e);
+        } catch (JsonProcessingException e) {
+            throw new RuntimeException(e);
+        }
+
+        return oAuthToken;
+    }
+
+    public GoogleProfile requestGoogleProfile(GoogleOAuthToken oAuthToken) {
+
+        RestTemplate restTemplate = new RestTemplate();
+        ObjectMapper objectMapper = new ObjectMapper();
+
+        HttpHeaders header = new HttpHeaders();
+        header.add("Authorization", "Bearer " + oAuthToken.getAccess_token());
+
+        HttpEntity<MultiValueMap<String, String>> googleProfileRequest = new HttpEntity<>(header);
+
+        ResponseEntity<String> googleProfileResponse = restTemplate.exchange(
+                "https://www.googleapis.com/oauth2/v2/userinfo",
+                HttpMethod.GET,
+                googleProfileRequest,
+                String.class
+        );
+
+        GoogleProfile googleProfile = null;
+
+        try {
+            googleProfile = objectMapper.readValue(googleProfileResponse.getBody(), GoogleProfile.class);
+        } catch (JsonMappingException e) {
+            e.printStackTrace();
+        } catch (JsonProcessingException e) {
+            e.printStackTrace();
+        }
+
+        return googleProfile;
+    }
+}