feat: NAVER login impl

app/build.gradle.kts

@@ -30,6 +30,7 @@ fun String.escapeForBuildConfig(): String {
 
 val kakaoNativeAppKey = readBuildConfigString("KAKAO_NATIVE_APP_KEY")
 val naverClientId = readBuildConfigString("NAVER_CLIENT_ID")
+val naverClientSecret = readBuildConfigString("NAVER_CLIENT_SECRET")
 val naverClientName = readBuildConfigString("NAVER_CLIENT_NAME").ifBlank { "Hangsha" }
 
 android {
@@ -67,6 +68,11 @@ android {
             "NAVER_CLIENT_ID",
             "\"${naverClientId.escapeForBuildConfig()}\""
         )
+        buildConfigField(
+            "String",
+            "NAVER_CLIENT_SECRET",
+            "\"${naverClientSecret.escapeForBuildConfig()}\""
+        )
         buildConfigField(
             "String",
             "NAVER_CLIENT_NAME",
@@ -133,6 +139,7 @@ dependencies {
     implementation("com.google.android.gms:play-services-location:21.0.1")
     implementation("com.google.android.gms:play-services-auth:21.5.1")
     implementation("com.kakao.sdk:v2-user:2.24.0")
+    implementation("com.navercorp.nid:oauth:5.11.2")
     implementation("org.jetbrains.kotlinx:kotlinx-coroutines-play-services:1.7.3")
     implementation(libs.coil.compose)
     implementation("androidx.emoji2:emoji2-emojipicker:1.4.0")

app/src/main/java/com/example/hangsha_android/HangshaApplication.kt

@@ -2,6 +2,7 @@ package com.example.hangsha_android
 
 import android.app.Application
 import com.kakao.sdk.common.KakaoSdk
+import com.navercorp.nid.NidOAuth
 import dagger.hilt.android.HiltAndroidApp
 
 @HiltAndroidApp
@@ -12,5 +13,17 @@ class HangshaApplication : Application() {
         if (BuildConfig.KAKAO_NATIVE_APP_KEY.isNotBlank()) {
             KakaoSdk.init(this, BuildConfig.KAKAO_NATIVE_APP_KEY)
         }
+
+        if (
+            BuildConfig.NAVER_CLIENT_ID.isNotBlank() &&
+            BuildConfig.NAVER_CLIENT_SECRET.isNotBlank()
+        ) {
+            NidOAuth.initialize(
+                context = this,
+                clientId = BuildConfig.NAVER_CLIENT_ID,
+                clientSecret = BuildConfig.NAVER_CLIENT_SECRET,
+                clientName = BuildConfig.NAVER_CLIENT_NAME
+            )
+        }
     }
-}
+}

app/src/main/java/com/example/hangsha_android/data/repository/AuthRepository.kt

@@ -1,4 +1,4 @@
-package com.example.hangsha_android.data.repository
+package com.example.hangsha_android.data.repository
 
 import com.example.hangsha_android.data.network.api.AuthApi
 import com.example.hangsha_android.data.network.model.LoginRequest
@@ -28,7 +28,7 @@ class AuthRepository @Inject constructor(
             SocialLoginRequest(
                 provider = GOOGLE_PROVIDER,
                 code = serverAuthCode,
-                codeVerifier = null,
+                codeVerifier = "",
                 clientType = MOBILE_CLIENT_TYPE
             )
         )
@@ -100,3 +100,6 @@ class AuthRepository @Inject constructor(
         private const val MOBILE_CLIENT_TYPE = "MOB"
     }
 }
+
+
+

app/src/main/java/com/example/hangsha_android/ui/navigation/HangshaNavHost.kt

@@ -71,6 +71,8 @@ import com.kakao.sdk.auth.model.OAuthToken
 import com.kakao.sdk.common.model.ClientError
 import com.kakao.sdk.common.model.ClientErrorCause
 import com.kakao.sdk.user.UserApiClient
+import com.navercorp.nid.NidOAuth
+import com.navercorp.nid.oauth.util.NidOAuthCallback
 
 sealed class HangshaDestinations(val route: String) {
     data object Splash : HangshaDestinations("splash")
@@ -211,6 +213,21 @@ fun NavGraphBuilder.loginGraph(navController: NavHostController) {
                 loginViewModel.loginWithKakao(token?.accessToken)
             }
         }
+        val naverLoginCallback = remember(loginViewModel) {
+            object : NidOAuthCallback {
+                override fun onSuccess() {
+                    loginViewModel.loginWithNaver(NidOAuth.getAccessToken())
+                }
+
+                override fun onFailure(errorCode: String, errorDesc: String) {
+                    Log.e(
+                        "AuthLog",
+                        "Naver login failed: errorCode=$errorCode, errorDesc=$errorDesc"
+                    )
+                    loginViewModel.onNaverLoginError(errorDesc.ifBlank { "Naver login failed." })
+                }
+            }
+        }
 
         LaunchedEffect(loginUiState.isLoginSuccessful) {
             if (!loginUiState.isLoginSuccessful) {
@@ -270,8 +287,14 @@ fun NavGraphBuilder.loginGraph(navController: NavHostController) {
                 }
             },
             onNaverLoginClick = {
-                // TODO(NAVER_LOGIN): Decide how to handle Naver client secret before enabling the native SDK login flow.
-                loginViewModel.onNaverLoginConfigMissing()
+                if (
+                    BuildConfig.NAVER_CLIENT_ID.isBlank() ||
+                    BuildConfig.NAVER_CLIENT_SECRET.isBlank()
+                ) {
+                    loginViewModel.onNaverLoginConfigMissing()
+                } else {
+                    NidOAuth.requestLogin(context, naverLoginCallback)
+                }
             },
             onGuestContinueClick = {
                 loginViewModel.continueAsGuest()

app/src/main/java/com/example/hangsha_android/ui/view/login/LoginViewModel.kt

@@ -90,7 +90,7 @@ class LoginViewModel @Inject constructor(
     }
 
     fun onNaverLoginConfigMissing() {
-        onAuthFailure("Naver login requires a client secret handling decision before enabling.")
+        onAuthFailure("Naver login is not configured yet.")
     }
 
     fun onGoogleLoginCancelled() {