feat: Apple 로그인 서버 인증 및 토큰 자동 리프레시 구현

composeApp/build.gradle.kts

@@ -100,12 +100,14 @@ kotlin {
       implementation(libs.ktor.client.content.negotiation)
       implementation(libs.ktor.serialization.kotlinx.json)
       implementation(libs.ktor.client.logging)
+      implementation(libs.ktor.client.auth)
 
       implementation(libs.ksafe)
     }
     commonTest.dependencies {
       implementation(libs.kotlin.test)
       implementation(libs.kotlinx.coroutines.test)
+      implementation(libs.ktor.client.mock)
     }
   }
 }

composeApp/src/commonMain/kotlin/com/chukchukhaksa/mobile/MainViewModel.kt

@@ -66,7 +66,7 @@ class MainViewModel(
             is NetworkException -> { mviStore.setState { copy(showNetworkErrorDialog = true) } }
 //            is ConnectException -> { mviStore.setState { copy(showNetworkErrorDialog = true) } }
             else -> {
-                onShowToast(throwable.message ?: UnknownException().message)
+                onShowToast("네트워크 오류가 발생했습니다.")
                 throwable.record()
             }
         }

composeApp/src/commonMain/kotlin/com/chukchukhaksa/mobile/common/kmp/AppleSignInClient.kt

@@ -6,6 +6,7 @@ data class AppleSignInResult(
     val userId: String,
     val email: String?,
     val fullName: String?,
+    val nonce: String,
 )
 
 expect class AppleSignInClient() {

composeApp/src/commonMain/kotlin/com/chukchukhaksa/mobile/data/auth/datasource/RemoteAuthDataSource.kt

@@ -4,6 +4,6 @@ import com.chukchukhaksa.mobile.domain.auth.model.RefreshTokenResult
 import com.chukchukhaksa.mobile.domain.auth.model.SignInResult
 
 interface RemoteAuthDataSource {
-    suspend fun signIn(idToken: String, nonce: String): SignInResult
+    suspend fun signIn(provider: String, idToken: String, nonce: String): SignInResult
     suspend fun refreshToken(refreshToken: String): RefreshTokenResult
 }

composeApp/src/commonMain/kotlin/com/chukchukhaksa/mobile/data/auth/repository/AuthRepositoryImpl.kt

@@ -10,8 +10,8 @@ class AuthRepositoryImpl(
     private val localAuthDataSource: LocalAuthDataSource,
 ) : AuthRepository {
 
-    override suspend fun signIn(idToken: String, nonce: String): SignInResult {
-        return remoteAuthDataSource.signIn(idToken = idToken, nonce = nonce)
+    override suspend fun signIn(provider: String, idToken: String, nonce: String): SignInResult {
+        return remoteAuthDataSource.signIn(provider = provider, idToken = idToken, nonce = nonce)
     }
 
     override suspend fun refreshToken() {

composeApp/src/commonMain/kotlin/com/chukchukhaksa/mobile/di/DomainModules.kt

@@ -45,7 +45,7 @@ val domainModule = module {
     factory { CheckNeedForceUpdateUseCase(get())}
 
     // Auth use cases
-    factory { AppleLoginUseCase(get()) }
+    factory { AppleLoginUseCase(get(), get()) }
     factory { CheckAuthStateUseCase(get()) }
     factory { KakaoLoginUseCase(get(), get()) }
 }

composeApp/src/commonMain/kotlin/com/chukchukhaksa/mobile/domain/auth/repository/AuthRepository.kt

@@ -3,7 +3,7 @@ package com.chukchukhaksa.mobile.domain.auth.repository
 import com.chukchukhaksa.mobile.domain.auth.model.SignInResult
 
 interface AuthRepository {
-    suspend fun signIn(idToken: String, nonce: String): SignInResult
+    suspend fun signIn(provider: String, idToken: String, nonce: String): SignInResult
     suspend fun refreshToken()
     suspend fun saveTokens(accessToken: String, refreshToken: String)
     suspend fun getAccessToken(): String?

composeApp/src/commonMain/kotlin/com/chukchukhaksa/mobile/domain/auth/usecase/AppleLoginUseCase.kt

@@ -1,13 +1,25 @@
 package com.chukchukhaksa.mobile.domain.auth.usecase
 
-import com.chukchukhaksa.mobile.common.kmp.AppleSignInResult
 import com.chukchukhaksa.mobile.common.kmp.AppleSignInClient
+import com.chukchukhaksa.mobile.domain.auth.model.SignInResult
+import com.chukchukhaksa.mobile.domain.auth.repository.AuthRepository
 import com.chukchukhaksa.mobile.domain.common.runCatchingIgnoreCancelled
 
 class AppleLoginUseCase(
     private val appleSignInClient: AppleSignInClient,
+    private val authRepository: AuthRepository,
 ) {
-    suspend operator fun invoke(): Result<AppleSignInResult> = runCatchingIgnoreCancelled {
-        appleSignInClient.signIn()
+    suspend operator fun invoke(): Result<SignInResult> = runCatchingIgnoreCancelled {
+        val appleResult = appleSignInClient.signIn()
+        val signInResult = authRepository.signIn(
+            provider = "APPLE",
+            idToken = appleResult.identityToken,
+            nonce = appleResult.nonce,
+        )
+        authRepository.saveTokens(
+            accessToken = signInResult.accessToken,
+            refreshToken = signInResult.refreshToken,
+        )
+        signInResult
     }
 }

composeApp/src/commonMain/kotlin/com/chukchukhaksa/mobile/domain/auth/usecase/KakaoLoginUseCase.kt

@@ -13,6 +13,7 @@ class KakaoLoginUseCase(
         runCatchingIgnoreCancelled {
             val kakaoResult = kakaoSignInClient.signIn(context)
             val signInResult = authRepository.signIn(
+                provider = "KAKAO",
                 idToken = kakaoResult.idToken,
                 nonce = kakaoResult.nonce,
             )

composeApp/src/commonMain/kotlin/com/chukchukhaksa/mobile/presentation/landing/LandingScreen.kt

@@ -130,7 +130,7 @@ fun LandingScreen(
                     iconRes = Res.drawable.ic_apple_logo,
                     containerColor = Black100,
                     contentColor = White100,
-                    enabled = true,
+                    enabled = !uiState.isLoading,
                     onClick = onAppleLogin,
                 )
             }

composeApp/src/commonMain/kotlin/com/chukchukhaksa/mobile/presentation/landing/LandingViewModel.kt

@@ -4,11 +4,13 @@ import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import com.chukchukhaksa.mobile.common.ui.MviStore
 import com.chukchukhaksa.mobile.common.ui.mviStore
+import com.chukchukhaksa.mobile.domain.auth.usecase.AppleLoginUseCase
 import com.chukchukhaksa.mobile.domain.auth.usecase.KakaoLoginUseCase
 import kotlinx.coroutines.launch
 
 class LandingViewModel(
     private val kakaoLoginUseCase: KakaoLoginUseCase,
+    private val appleLoginUseCase: AppleLoginUseCase,
 ) : ViewModel() {
 
     val mviStore: MviStore<LandingState, LandingSideEffect> = mviStore(LandingState())
@@ -33,6 +35,21 @@ class LandingViewModel(
     }
 
     fun onAppleLogin() {
-        mviStore.postSideEffect(LandingSideEffect.ShowToast("준비 중입니다"))
+        if (mviStore.uiState.value.isLoading) return
+        mviStore.setState { copy(isLoading = true) }
+
+        viewModelScope.launch {
+            try {
+                appleLoginUseCase()
+                    .onSuccess {
+                        mviStore.postSideEffect(LandingSideEffect.NavigateHome)
+                    }
+                    .onFailure { throwable ->
+                        mviStore.postSideEffect(LandingSideEffect.HandleException(throwable))
+                    }
+            } finally {
+                mviStore.setState { copy(isLoading = false) }
+            }
+        }
     }
 }

composeApp/src/commonMain/kotlin/com/chukchukhaksa/mobile/remote/auth/AuthEventBus.kt

@@ -0,0 +1,18 @@
+package com.chukchukhaksa.mobile.remote.auth
+
+import kotlinx.coroutines.flow.MutableSharedFlow
+import kotlinx.coroutines.flow.SharedFlow
+import kotlinx.coroutines.flow.asSharedFlow
+
+class AuthEventBus {
+    private val _events = MutableSharedFlow<AuthEvent>(extraBufferCapacity = 1)
+    val events: SharedFlow<AuthEvent> = _events.asSharedFlow()
+
+    fun emit(event: AuthEvent = AuthEvent.TokenExpired) {
+        _events.tryEmit(event)
+    }
+}
+
+sealed interface AuthEvent {
+    data object TokenExpired : AuthEvent
+}

composeApp/src/commonMain/kotlin/com/chukchukhaksa/mobile/remote/auth/RemoteAuthDataSourceImpl.kt

@@ -18,9 +18,9 @@ class RemoteAuthDataSourceImpl(
     private val httpClient: HttpClient,
 ) : RemoteAuthDataSource {
 
-    override suspend fun signIn(idToken: String, nonce: String): SignInResult {
+    override suspend fun signIn(provider: String, idToken: String, nonce: String): SignInResult {
         val response = httpClient.post("users/signin") {
-            setBody(SignInRequest(idToken = idToken, nonce = nonce))
+            setBody(SignInRequest(provider = provider, idToken = idToken, nonce = nonce))
         }.body<ApiResponse<SignInResponse>>()
 
         return response.getDataOrThrow().toSignInResult()

composeApp/src/commonMain/kotlin/com/chukchukhaksa/mobile/remote/auth/model/SignInRequest.kt

@@ -5,6 +5,7 @@ import kotlinx.serialization.Serializable
 
 @Serializable
 data class SignInRequest(
+    val provider: String,
     @SerialName("id_token") val idToken: String,
     val nonce: String,
 )

composeApp/src/commonMain/kotlin/com/chukchukhaksa/mobile/remote/di/HttpClientModule.kt

@@ -2,17 +2,29 @@ package com.chukchukhaksa.mobile.remote.di
 
 import com.chukchukhaksa.mobile.common.kmp.httpClientEngineFactory
 import com.chukchukhaksa.mobile.common.kmp.isDebug
+import com.chukchukhaksa.mobile.data.auth.datasource.LocalAuthDataSource
+import com.chukchukhaksa.mobile.remote.auth.AuthEventBus
+import com.chukchukhaksa.mobile.remote.auth.model.RefreshRequest
+import com.chukchukhaksa.mobile.remote.auth.model.RefreshResponse
+import com.chukchukhaksa.mobile.remote.common.ApiResponse
+import com.chukchukhaksa.mobile.remote.common.getDataOrThrow
 import io.github.aakira.napier.Napier
 import io.ktor.client.HttpClient
+import io.ktor.client.call.body
 import io.ktor.client.plugins.HttpSend
 import io.ktor.client.plugins.HttpTimeout
+import io.ktor.client.plugins.auth.Auth
+import io.ktor.client.plugins.auth.providers.BearerTokens
+import io.ktor.client.plugins.auth.providers.bearer
 import io.ktor.client.plugins.contentnegotiation.ContentNegotiation
 import io.ktor.client.plugins.defaultRequest
 import io.ktor.client.plugins.logging.LogLevel
 import io.ktor.client.plugins.logging.Logger
 import io.ktor.client.plugins.logging.Logging
 import io.ktor.client.plugins.observer.ResponseObserver
 import io.ktor.client.plugins.plugin
+import io.ktor.client.request.post
+import io.ktor.client.request.setBody
 import io.ktor.client.statement.bodyAsText
 import io.ktor.http.ContentType
 import io.ktor.http.HttpHeaders
@@ -32,8 +44,40 @@ private fun String.prettyPrintJson(): String = try {
     this
 }
 
+private val BASE_URL = if (isDebug) "https://dev.api.cchaksa.com/api/" else "https://api.cchaksa.com/api/"
+
+internal val AUTH_EXCLUDED_PATHS = listOf(
+    "auth/refresh",
+    "users/signin",
+)
+
 val httpClientModule = module {
+    single { AuthEventBus() }
+
     single {
+        val localAuthDataSource: LocalAuthDataSource = get()
+        val authEventBus: AuthEventBus = get()
+
+        val refreshClient = HttpClient(httpClientEngineFactory) {
+            install(HttpTimeout) {
+                requestTimeoutMillis = 10_000
+                connectTimeoutMillis = 5_000
+                socketTimeoutMillis = 10_000
+            }
+            install(ContentNegotiation) {
+                json(
+                    Json {
+                        ignoreUnknownKeys = true
+                        isLenient = true
+                    },
+                )
+            }
+            defaultRequest {
+                url(BASE_URL)
+                contentType(ContentType.Application.Json)
+            }
+        }
+
         HttpClient(httpClientEngineFactory) {
             install(HttpTimeout) {
                 requestTimeoutMillis = 15_000
@@ -50,6 +94,52 @@ val httpClientModule = module {
                 )
             }
 
+            install(Auth) {
+                bearer {
+                    loadTokens {
+                        val accessToken = localAuthDataSource.getAccessToken()
+                        val refreshToken = localAuthDataSource.getRefreshToken()
+                        if (accessToken != null && refreshToken != null) {
+                            BearerTokens(accessToken, refreshToken)
+                        } else {
+                            null
+                        }
+                    }
+
+                    refreshTokens {
+                        val currentRefreshToken = localAuthDataSource.getRefreshToken()
+                        if (currentRefreshToken == null) {
+                            localAuthDataSource.clearTokens()
+                            authEventBus.emit()
+                            return@refreshTokens null
+                        }
+
+                        try {
+                            val response = refreshClient.post("auth/refresh") {
+                                setBody(RefreshRequest(refreshToken = currentRefreshToken))
+                            }.body<ApiResponse<RefreshResponse>>()
+
+                            val result = response.getDataOrThrow()
+                            localAuthDataSource.saveAccessToken(result.accessToken)
+                            localAuthDataSource.saveRefreshToken(result.refreshToken)
+                            BearerTokens(result.accessToken, result.refreshToken)
+                        } catch (e: Exception) {
+                            Napier.e("Token refresh failed", e)
+                            localAuthDataSource.clearTokens()
+                            authEventBus.emit()
+                            null
+                        }
+                    }
+
+                    sendWithoutRequest { request ->
+                        val requestPath = request.url.pathSegments.joinToString("/")
+                        AUTH_EXCLUDED_PATHS.none { path ->
+                            requestPath.contains(path)
+                        }
+                    }
+                }
+            }
+
             install(Logging) {
                 logger = object : Logger {
                     override fun log(message: String) {
@@ -83,7 +173,7 @@ val httpClientModule = module {
             }
 
             defaultRequest {
-                url("https://api.cchaksa.com/api/")
+                url(BASE_URL)
                 contentType(ContentType.Application.Json)
             }
         }.also { client ->

composeApp/src/commonTest/kotlin/com/chukchukhaksa/mobile/remote/auth/FakeLocalAuthDataSource.kt

@@ -0,0 +1,28 @@
+package com.chukchukhaksa.mobile.remote.auth
+
+import com.chukchukhaksa.mobile.data.auth.datasource.LocalAuthDataSource
+
+class FakeLocalAuthDataSource(
+    initialAccessToken: String? = null,
+    initialRefreshToken: String? = null,
+) : LocalAuthDataSource {
+    private var accessToken: String? = initialAccessToken
+    private var refreshToken: String? = initialRefreshToken
+
+    override suspend fun saveAccessToken(token: String) {
+        accessToken = token
+    }
+
+    override suspend fun getAccessToken(): String? = accessToken
+
+    override suspend fun saveRefreshToken(token: String) {
+        refreshToken = token
+    }
+
+    override suspend fun getRefreshToken(): String? = refreshToken
+
+    override suspend fun clearTokens() {
+        accessToken = null
+        refreshToken = null
+    }
+}