feat: Feature apple login (#104)

* feat: Create apple payload information storage record

* feat: Create Apple Token Decoder

* feat: Add Apple Login

src/main/java/com/universe/uni/controller/AuthController.java

@@ -35,10 +35,15 @@ public AuthTokenDto authByGoogle(@RequestBody AuthRequestDto request) {
 		return authService.authWithGoogle(request.code());
 	}
 
-    @GetMapping("kakao/callback")
-    public AuthRequestDto redirectKakaoAuth(@RequestParam(name = "code") String authenticationCode) {
-        return new AuthRequestDto(authenticationCode);
-    }
+	@PostMapping("apple")
+	public AuthTokenDto authByApple(@RequestBody AuthRequestDto request) {
+		return authService.authWithAppleUser(request.code());
+	}
+
+	@GetMapping("kakao/callback")
+	public AuthRequestDto redirectKakaoAuth(@RequestParam(name = "code") String authenticationCode) {
+		return new AuthRequestDto(authenticationCode);
+	}
 
 	@GetMapping("google/callback")
 	public AuthRequestDto redirectGoogleAuth(@RequestParam(name = "code") String authenticationCode) {

src/main/java/com/universe/uni/domain/ApplePayload.java

@@ -0,0 +1,29 @@
+package com.universe.uni.domain;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+public record ApplePayload(
+	@JsonProperty("aud")
+	String aud,
+	@JsonProperty("auth_time")
+	Long authTime,
+	@JsonProperty("c_hash")
+	String cHash,
+	@JsonProperty("email")
+	String email,
+	@JsonProperty("email_verified")
+	String emailVerified,
+	@JsonProperty("exp")
+	Long exp,
+	@JsonProperty("iat")
+	Long iat,
+	@JsonProperty("is_private_email")
+	String isPrivateEmail,
+	@JsonProperty("iss")
+	String iss,
+	@JsonProperty("nonce_supported")
+	Boolean nonceSupported,
+	@JsonProperty("sub")
+	String sub
+) {
+}

src/main/java/com/universe/uni/domain/AppleTokenDecodeManager.java

@@ -0,0 +1,31 @@
+package com.universe.uni.domain;
+
+import java.util.Base64;
+
+import org.springframework.stereotype.Component;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.universe.uni.exception.UnauthorizedException;
+import com.universe.uni.exception.dto.ErrorType;
+
+@Component
+public class AppleTokenDecodeManager implements AppleTokenManager {
+
+	@Override
+	public String decodeEmail(String token) {
+		String[] encodedToken = token.split("\\.");
+		String encodedPayload = encodedToken[1];
+		Base64.Decoder decoder = Base64.getDecoder();
+		String payLoad = new String(decoder.decode(encodedPayload));
+
+		ObjectMapper mapper = new ObjectMapper();
+		ApplePayload applePayload = null;
+		try {
+			applePayload = mapper.readValue(payLoad, ApplePayload.class);
+		} catch (JsonProcessingException e) {
+			throw new UnauthorizedException(ErrorType.UNSUPPORTED_TOKEN);
+		}
+		return applePayload.email();
+	}
+}

src/main/java/com/universe/uni/domain/AppleTokenManager.java

@@ -0,0 +1,8 @@
+package com.universe.uni.domain;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+
+public interface AppleTokenManager {
+
+	String decodeEmail(String token);
+}

src/main/java/com/universe/uni/service/AuthService.java

@@ -4,12 +4,14 @@
 
 import org.springframework.stereotype.Service;
 
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.universe.uni.domain.AppleTokenManager;
 import com.universe.uni.domain.SnsType;
 import com.universe.uni.domain.entity.User;
 import com.universe.uni.dto.AuthTokenDto;
-import com.universe.uni.external.response.GoogleAccessTokenResponse;
+import com.universe.uni.exception.ApiException;
+import com.universe.uni.exception.dto.ErrorType;
 import com.universe.uni.external.response.GoogleUserInfoResponse;
-import com.universe.uni.external.response.KakaoAuthResponse;
 import com.universe.uni.external.response.KakaoUserResponse;
 import com.universe.uni.repository.GoogleRepository;
 import com.universe.uni.repository.KakaoRepository;
@@ -25,6 +27,7 @@ public class AuthService implements AuthServiceContract {
 	private final KakaoRepository kakaoRepository;
 	private final GoogleRepository googleRepository;
 	private final UserRepository userRepository;
+	private final AppleTokenManager appleTokenManager;
 
 	@Override
 	@Transactional
@@ -58,6 +61,22 @@ private User registerGoogleUser(GoogleUserInfoResponse googleUser) {
 			.build();
 	}
 
+	@Override
+	@Transactional
+	public AuthTokenDto authWithAppleUser(String identityToken) {
+		final String userEmail = appleTokenManager.decodeEmail(identityToken);
+		final User user = userRepository.findBySnsAuthCode(userEmail)
+			.orElseGet(() -> userRepository.save(registerAppleUser(userEmail)));
+		return beIssuedAuthToken(user.getId());
+	}
+
+	private User registerAppleUser(String email) {
+		return User.builder()
+			.snsType(SnsType.APPLE)
+			.snsAuthCode(email)
+			.build();
+	}
+
 	private AuthTokenDto beIssuedAuthToken(long userId) {
 		return jwtManager.issueToken(userId);
 	}

src/main/java/com/universe/uni/service/AuthServiceContract.java

@@ -10,4 +10,7 @@ public interface AuthServiceContract {
 
 	@Transactional
 	AuthTokenDto authWithGoogle(String accessToken);
+
+	@Transactional
+	AuthTokenDto authWithAppleUser(String identityToken);
 }