Moved Preference Helper Initialization to Viewmodel

Author: revanthkumarJ

androidApp/src/main/kotlin/org/mifos/mobile/HomeActivity.kt

@@ -17,7 +17,6 @@ import androidx.activity.viewModels
 import androidx.compose.foundation.isSystemInDarkTheme
 import androidx.compose.runtime.CompositionLocalProvider
 import androidx.compose.runtime.DisposableEffect
-import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.setValue
@@ -33,7 +32,6 @@ import kotlinx.coroutines.flow.onEach
 import kotlinx.coroutines.launch
 import org.mifos.mobile.HomeActivityUiState.Success
 import org.mifos.mobile.core.data.utils.NetworkMonitor
-import org.mifos.mobile.core.datastore.PreferencesHelper
 import org.mifos.mobile.core.designsystem.theme.MifosMobileTheme
 import org.mifos.mobile.core.designsystem.theme.darkScrim
 import org.mifos.mobile.core.designsystem.theme.lightScrim
@@ -50,17 +48,13 @@ class HomeActivity : ComponentActivity() {
     @Inject
     lateinit var networkMonitor: NetworkMonitor
 
-    @Inject
-    lateinit var preferenceHelper: PreferencesHelper
-
     private val viewModel: HomeActivityViewModel by viewModels()
 
     override fun onCreate(savedInstanceState: Bundle?) {
         val splashScreen = installSplashScreen()
         super.onCreate(savedInstanceState)
         var uiState: HomeActivityUiState by mutableStateOf(HomeActivityUiState.Loading)
 
-        // Update the uiState
         lifecycleScope.launch {
             lifecycle.repeatOnLifecycle(Lifecycle.State.STARTED) {
                 viewModel.uiState
@@ -76,6 +70,7 @@ class HomeActivity : ComponentActivity() {
             }
         }
 
+
         enableEdgeToEdge()
 
         setContent {
@@ -99,12 +94,15 @@ class HomeActivity : ComponentActivity() {
                 onDispose {}
             }
 
-            val currentTheme by preferenceHelper.themeFlow.collectAsState()
-            val isDarkMode = when (currentTheme) {
-                AppTheme.DARK -> true
-                AppTheme.LIGHT -> false
-                AppTheme.SYSTEM -> isSystemInDarkMode
+            val isDarkMode = when (uiState) {
+                is Success -> when ((uiState as Success).themeState) {
+                    AppTheme.DARK -> true
+                    AppTheme.LIGHT -> false
+                    AppTheme.SYSTEM -> isSystemInDarkMode
+                }
+                else -> isSystemInDarkMode
             }
+
             CompositionLocalProvider {
                 MifosMobileTheme(isDarkMode) {
                     RootNavGraph(
@@ -124,4 +122,4 @@ class HomeActivity : ComponentActivity() {
             }
         }
     }
-}
+}

androidApp/src/main/kotlin/org/mifos/mobile/HomeActivityViewModel.kt

@@ -14,22 +14,29 @@ import androidx.lifecycle.viewModelScope
 import dagger.hilt.android.lifecycle.HiltViewModel
 import kotlinx.coroutines.flow.SharingStarted
 import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.combine
 import kotlinx.coroutines.flow.map
 import kotlinx.coroutines.flow.stateIn
 import kotlinx.coroutines.launch
 import org.mifos.library.passcode.data.PasscodeManager
 import org.mifos.mobile.core.data.repository.UserDataRepository
+import org.mifos.mobile.core.datastore.PreferencesHelper
 import org.mifos.mobile.core.model.UserData
+import org.mifos.mobile.core.model.enums.AppTheme
 import javax.inject.Inject
 
 @HiltViewModel
 class HomeActivityViewModel @Inject constructor(
     private val userDataRepository: UserDataRepository,
     private val passcodeManager: PasscodeManager,
+    private val preferencesHelper: PreferencesHelper
 ) : ViewModel() {
 
-    val uiState: StateFlow<HomeActivityUiState> = userDataRepository.userData.map {
-        HomeActivityUiState.Success(it)
+    val uiState: StateFlow<HomeActivityUiState> = combine(
+        userDataRepository.userData,
+        preferencesHelper.themeFlow
+    ) { userData, themeState ->
+        HomeActivityUiState.Success(userData, themeState)
     }.stateIn(
         scope = viewModelScope,
         initialValue = HomeActivityUiState.Loading,
@@ -46,5 +53,5 @@ class HomeActivityViewModel @Inject constructor(
 
 sealed interface HomeActivityUiState {
     data object Loading : HomeActivityUiState
-    data class Success(val userData: UserData) : HomeActivityUiState
+    data class Success(val userData: UserData,val themeState: AppTheme) : HomeActivityUiState
 }

core/datastore/src/main/java/org/mifos/mobile/core/datastore/PreferencesHelper.kt

@@ -18,6 +18,7 @@ import kotlinx.coroutines.channels.Channel
 import kotlinx.coroutines.channels.awaitClose
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
 import kotlinx.coroutines.flow.buffer
 import kotlinx.coroutines.flow.callbackFlow
 import org.mifos.mobile.core.model.enums.AppTheme
@@ -31,8 +32,8 @@ import javax.inject.Singleton
  */
 @Singleton
 class PreferencesHelper @Inject constructor(@ApplicationContext context: Context?) {
-    val themeFlowState: MutableStateFlow<AppTheme>
-    val themeFlow: StateFlow<AppTheme> get() = themeFlowState
+    private val themeFlowState: MutableStateFlow<AppTheme>
+    val themeFlow: StateFlow<AppTheme> get() = themeFlowState.asStateFlow()
 
     private val sharedPreferences: SharedPreferences? =
         PreferenceManager.getDefaultSharedPreferences(context)