[FEAT]#30: 자동 로그인을 추가해요

core/model/src/main/kotlin/com/bff/wespot/model/constants/LoginState.kt

@@ -0,0 +1,5 @@
+package com.bff.wespot.model.constants
+
+enum class LoginState {
+    LOGIN_SUCCESS, LOGIN_FAILURE;
+}

feature/auth/src/main/kotlin/com/bff/wespot/auth/AuthActivity.kt

@@ -1,17 +1,19 @@
 package com.bff.wespot.auth
 
 import android.os.Bundle
+import android.view.View
+import android.view.ViewTreeObserver
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
+import androidx.activity.viewModels
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.material3.CircularProgressIndicator
 import androidx.compose.material3.Surface
+import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
-import androidx.hilt.navigation.compose.hiltViewModel
-import androidx.lifecycle.viewmodel.compose.viewModel
 import androidx.navigation.compose.rememberNavController
 import com.bff.wespot.auth.screen.NavGraphs
 import com.bff.wespot.auth.screen.destinations.ClassScreenDestination
@@ -21,9 +23,11 @@ import com.bff.wespot.auth.screen.destinations.GenderScreenDestination
 import com.bff.wespot.auth.screen.destinations.GradeScreenDestination
 import com.bff.wespot.auth.screen.destinations.NameScreenDestination
 import com.bff.wespot.auth.screen.destinations.SchoolScreenDestination
+import com.bff.wespot.auth.state.AuthAction
 import com.bff.wespot.auth.state.AuthSideEffect
 import com.bff.wespot.auth.viewmodel.AuthViewModel
 import com.bff.wespot.designsystem.theme.WeSpotTheme
+import com.bff.wespot.model.constants.LoginState
 import com.danggeun.navigation.Navigator
 import com.ramcosta.composedestinations.DestinationsNavHost
 import com.ramcosta.composedestinations.navigation.dependency
@@ -36,17 +40,22 @@ import javax.inject.Inject
 
 @AndroidEntryPoint
 class AuthActivity : ComponentActivity() {
+    private val viewModel by viewModels<AuthViewModel>()
+    private lateinit var loginState: LoginState
+
     @Inject
     lateinit var navigator: Navigator
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
+        login()
+
         setContent {
             val navController = rememberNavController()
             val engine = rememberNavHostEngine()
-            val viewModel: AuthViewModel = hiltViewModel()
 
             val state by viewModel.collectAsState()
+            val action = viewModel::onAction
 
             viewModel.collectSideEffect {
                 when (it) {
@@ -82,7 +91,8 @@ class AuthActivity : ComponentActivity() {
                     }
 
                     AuthSideEffect.NavigateToMainActivity -> {
-                        navigator.navigateToMain(this)
+                        val intent = navigator.navigateToMain(this)
+                        startActivity(intent)
                     }
                 }
             }
@@ -107,6 +117,33 @@ class AuthActivity : ComponentActivity() {
                     CircularProgressIndicator()
                 }
             }
+
+            LaunchedEffect(key1 = Unit) {
+                action(AuthAction.autoLogin)
+            }
         }
     }
+
+    private fun login() {
+        viewModel.onAction(AuthAction.autoLogin)
+        viewModel.loginState.observe(this) {
+            loginState = it
+        }
+
+        val content: View = findViewById(android.R.id.content)
+        content.viewTreeObserver.addOnPreDrawListener(object : ViewTreeObserver.OnPreDrawListener {
+            override fun onPreDraw(): Boolean {
+                return if (::loginState.isInitialized) {
+                    if (loginState == LoginState.LOGIN_SUCCESS) {
+                        val intent = navigator.navigateToMain(this@AuthActivity)
+                        startActivity(intent)
+                    }
+                    content.viewTreeObserver.removeOnPreDrawListener(this)
+                    true
+                } else {
+                    false
+                }
+            }
+        })
+    }
 }

feature/auth/src/main/kotlin/com/bff/wespot/auth/state/AuthAction.kt

@@ -21,6 +21,8 @@ sealed class AuthAction {
 
     data object signUp : AuthAction()
 
+    data object autoLogin : AuthAction()
+
     data class Navigation(val navigate: NavigationAction) : AuthAction()
 }
 

feature/auth/src/main/kotlin/com/bff/wespot/auth/viewmodel/AuthViewModel.kt

@@ -1,15 +1,20 @@
 package com.bff.wespot.auth.viewmodel
 
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.MutableLiveData
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import com.bff.wespot.auth.state.AuthAction
 import com.bff.wespot.auth.state.AuthSideEffect
 import com.bff.wespot.auth.state.AuthUiState
 import com.bff.wespot.auth.state.NavigationAction
+import com.bff.wespot.domain.repository.DataStoreRepository
 import com.bff.wespot.domain.repository.auth.AuthRepository
 import com.bff.wespot.domain.usecase.KakaoLoginUseCase
+import com.bff.wespot.domain.util.DataStoreKey
 import com.bff.wespot.model.auth.request.SignUp
 import com.bff.wespot.model.auth.response.School
+import com.bff.wespot.model.constants.LoginState
 import dagger.hilt.android.lifecycle.HiltViewModel
 import kotlinx.coroutines.CoroutineDispatcher
 import kotlinx.coroutines.flow.MutableStateFlow
@@ -29,9 +34,13 @@ class AuthViewModel @Inject constructor(
     private val kakaoLoginUseCase: KakaoLoginUseCase,
     private val authRepository: AuthRepository,
     private val dispatcher: CoroutineDispatcher,
+    private val dataStoreRepository: DataStoreRepository,
 ) : ViewModel(), ContainerHost<AuthUiState, AuthSideEffect> {
     override val container = container<AuthUiState, AuthSideEffect>(AuthUiState())
 
+    private val loginState_: MutableLiveData<LoginState> = MutableLiveData()
+    val loginState: LiveData<LoginState> = loginState_
+
     private val userInput = MutableStateFlow("")
 
     init {
@@ -50,6 +59,7 @@ class AuthViewModel @Inject constructor(
             is AuthAction.Navigation -> handleNavigation(action.navigate)
             is AuthAction.LoginWithKakao -> loginWithKakao()
             is AuthAction.signUp -> signUp()
+            is AuthAction.autoLogin -> autoLogin()
             else -> {}
         }
     }
@@ -68,6 +78,17 @@ class AuthViewModel @Inject constructor(
         }
     }
 
+    private fun autoLogin()  {
+        viewModelScope.launch {
+            dataStoreRepository.getString(DataStoreKey.ACCESS_TOKEN)
+                .collect {
+                    if(it.isNotEmpty()) {
+                        loginState_.postValue(LoginState.LOGIN_SUCCESS)
+                    }
+                }
+        }
+    }
+
     private fun signUp() = intent {
         reduce {
             state.copy(
@@ -118,7 +139,6 @@ class AuthViewModel @Inject constructor(
 
     private fun fetchSchoolList(search: String) = intent {
         viewModelScope.launch(dispatcher) {
-            Timber.d("enter")
             authRepository.getSchoolList(search)
                 .onSuccess {
                     reduce {