Flatten `BluetoothViewModel` (#3138)

app/src/main/java/com/geeksville/mesh/MainActivity.kt

@@ -42,7 +42,6 @@ import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import com.geeksville.mesh.android.GeeksvilleApplication
 import com.geeksville.mesh.android.Logging
 import com.geeksville.mesh.android.prefs.UiPrefs
-import com.geeksville.mesh.model.BluetoothViewModel
 import com.geeksville.mesh.model.UIViewModel
 import com.geeksville.mesh.navigation.DEEP_LINK_BASE_URI
 import com.geeksville.mesh.ui.MainScreen
@@ -58,7 +57,6 @@ import javax.inject.Inject
 class MainActivity :
     AppCompatActivity(),
     Logging {
-    private val bluetoothViewModel: BluetoothViewModel by viewModels()
     private val model: UIViewModel by viewModels()
 
     // This is aware of the Activity lifecycle and handles binding to the mesh service.
@@ -108,7 +106,7 @@ class MainActivity :
 
                 val appIntroCompleted by model.appIntroCompleted.collectAsStateWithLifecycle()
                 if (appIntroCompleted) {
-                    MainScreen(uIViewModel = model, bluetoothViewModel = bluetoothViewModel)
+                    MainScreen(uIViewModel = model)
                 } else {
                     AppIntroductionScreen(
                         onDone = {

app/src/main/java/com/geeksville/mesh/model/BluetoothViewModel.kt

@@ -1,33 +0,0 @@
-/*
- * Copyright (c) 2025 Meshtastic LLC
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-
-package com.geeksville.mesh.model
-
-import androidx.lifecycle.ViewModel
-import com.geeksville.mesh.repository.bluetooth.BluetoothRepository
-import dagger.hilt.android.lifecycle.HiltViewModel
-import kotlinx.coroutines.flow.map
-import javax.inject.Inject
-
-/** Thin view model which adapts the view layer to the `BluetoothRepository`. */
-@HiltViewModel
-class BluetoothViewModel @Inject constructor(private val bluetoothRepository: BluetoothRepository) : ViewModel() {
-    /** Called when permissions have been updated. This causes an explicit refresh of the bluetooth state. */
-    fun permissionsUpdated() = bluetoothRepository.refreshState()
-
-    val enabled = bluetoothRepository.state.map { it.enabled }
-}

app/src/main/java/com/geeksville/mesh/navigation/ConnectionsNavigation.kt

@@ -24,12 +24,11 @@ import androidx.navigation.NavHostController
 import androidx.navigation.compose.composable
 import androidx.navigation.navDeepLink
 import androidx.navigation.navigation
-import com.geeksville.mesh.model.BluetoothViewModel
 import com.geeksville.mesh.ui.connections.ConnectionsScreen
 import com.geeksville.mesh.ui.settings.radio.components.LoRaConfigScreen
 
 /** Navigation graph for for the top level ConnectionsScreen - [ConnectionsRoutes.Connections]. */
-fun NavGraphBuilder.connectionsGraph(navController: NavHostController, bluetoothViewModel: BluetoothViewModel) {
+fun NavGraphBuilder.connectionsGraph(navController: NavHostController) {
     @Suppress("ktlint:standard:max-line-length")
     navigation<ConnectionsRoutes.ConnectionsGraph>(startDestination = ConnectionsRoutes.Connections) {
         composable<ConnectionsRoutes.Connections>(
@@ -40,7 +39,6 @@ fun NavGraphBuilder.connectionsGraph(navController: NavHostController, bluetooth
             val parentEntry =
                 remember(backStackEntry) { navController.getBackStackEntry(ConnectionsRoutes.ConnectionsGraph) }
             ConnectionsScreen(
-                bluetoothViewModel = bluetoothViewModel,
                 radioConfigViewModel = hiltViewModel(parentEntry),
                 onClickNodeChip = {
                     navController.navigate(NodesRoutes.NodeDetailGraph(it)) {

app/src/main/java/com/geeksville/mesh/ui/Main.kt

@@ -81,7 +81,6 @@ import com.geeksville.mesh.android.AddNavigationTracking
 import com.geeksville.mesh.android.BuildUtils.debug
 import com.geeksville.mesh.android.setAttributes
 import com.geeksville.mesh.model.BTScanModel
-import com.geeksville.mesh.model.BluetoothViewModel
 import com.geeksville.mesh.model.DeviceVersion
 import com.geeksville.mesh.model.Node
 import com.geeksville.mesh.model.UIViewModel
@@ -148,11 +147,7 @@ enum class TopLevelDestination(@StringRes val label: Int, val icon: ImageVector,
 @OptIn(ExperimentalMaterial3Api::class, ExperimentalPermissionsApi::class)
 @Suppress("LongMethod", "CyclomaticComplexMethod")
 @Composable
-fun MainScreen(
-    uIViewModel: UIViewModel = hiltViewModel(),
-    bluetoothViewModel: BluetoothViewModel = hiltViewModel(),
-    scanModel: BTScanModel = hiltViewModel(),
-) {
+fun MainScreen(uIViewModel: UIViewModel = hiltViewModel(), scanModel: BTScanModel = hiltViewModel()) {
     val navController = rememberNavController()
     val connectionState by uIViewModel.connectionState.collectAsStateWithLifecycle()
     val requestChannelSet by uIViewModel.requestChannelSet.collectAsStateWithLifecycle()
@@ -396,7 +391,7 @@ fun MainScreen(
                     nodesGraph(navController, uiViewModel = uIViewModel)
                     mapGraph(navController, uiViewModel = uIViewModel)
                     channelsGraph(navController, uiViewModel = uIViewModel)
-                    connectionsGraph(navController, bluetoothViewModel)
+                    connectionsGraph(navController)
                     settingsGraph(navController)
                 }
             }

app/src/main/java/com/geeksville/mesh/ui/connections/ConnectionsScreen.kt

@@ -62,7 +62,6 @@ import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import com.geeksville.mesh.ConfigProtos
 import com.geeksville.mesh.R
 import com.geeksville.mesh.model.BTScanModel
-import com.geeksville.mesh.model.BluetoothViewModel
 import com.geeksville.mesh.model.DeviceListEntry
 import com.geeksville.mesh.model.Node
 import com.geeksville.mesh.navigation.ConfigRoute
@@ -102,7 +101,6 @@ fun String?.isIPAddress(): Boolean = if (Build.VERSION.SDK_INT < Build.VERSION_C
 fun ConnectionsScreen(
     connectionsViewModel: ConnectionsViewModel = hiltViewModel(),
     scanModel: BTScanModel = hiltViewModel(),
-    bluetoothViewModel: BluetoothViewModel = hiltViewModel(),
     radioConfigViewModel: RadioConfigViewModel = hiltViewModel(),
     onClickNodeChip: (Int) -> Unit,
     onNavigateToSettings: () -> Unit,
@@ -120,7 +118,7 @@ fun ConnectionsScreen(
     val info by connectionsViewModel.myNodeInfo.collectAsStateWithLifecycle()
     val ourNode by connectionsViewModel.ourNodeInfo.collectAsStateWithLifecycle()
     val selectedDevice by scanModel.selectedNotNullFlow.collectAsStateWithLifecycle()
-    val bluetoothEnabled by bluetoothViewModel.enabled.collectAsStateWithLifecycle(false)
+    val bluetoothState by connectionsViewModel.bluetoothState.collectAsStateWithLifecycle()
     val regionUnset = config.lora.region == ConfigProtos.Config.LoRaConfig.RegionCode.UNSET
 
     val bleDevices by scanModel.bleDevicesForUi.collectAsStateWithLifecycle()
@@ -264,7 +262,7 @@ fun ConnectionsScreen(
                                     btDevices = bleDevices,
                                     selectedDevice = selectedDevice,
                                     scanModel = scanModel,
-                                    bluetoothEnabled = bluetoothEnabled,
+                                    bluetoothEnabled = bluetoothState.enabled,
                                 )
                             }
 

app/src/main/java/com/geeksville/mesh/ui/connections/ConnectionsViewModel.kt

@@ -24,6 +24,7 @@ import com.geeksville.mesh.android.prefs.UiPrefs
 import com.geeksville.mesh.database.NodeRepository
 import com.geeksville.mesh.database.entity.MyNodeEntity
 import com.geeksville.mesh.model.Node
+import com.geeksville.mesh.repository.bluetooth.BluetoothRepository
 import com.geeksville.mesh.repository.datastore.RadioConfigRepository
 import dagger.hilt.android.lifecycle.HiltViewModel
 import kotlinx.coroutines.flow.MutableStateFlow
@@ -37,8 +38,9 @@ import javax.inject.Inject
 class ConnectionsViewModel
 @Inject
 constructor(
-    private val radioConfigRepository: RadioConfigRepository,
-    private val nodeRepository: NodeRepository,
+    radioConfigRepository: RadioConfigRepository,
+    nodeRepository: NodeRepository,
+    bluetoothRepository: BluetoothRepository,
     private val uiPrefs: UiPrefs,
 ) : ViewModel() {
     val localConfig: StateFlow<LocalConfig> =
@@ -48,14 +50,13 @@ constructor(
             LocalConfig.getDefaultInstance(),
         )
 
-    val connectionState
-        get() = radioConfigRepository.connectionState
+    val connectionState = radioConfigRepository.connectionState
 
-    val myNodeInfo: StateFlow<MyNodeEntity?>
-        get() = nodeRepository.myNodeInfo
+    val myNodeInfo: StateFlow<MyNodeEntity?> = nodeRepository.myNodeInfo
 
-    val ourNodeInfo: StateFlow<Node?>
-        get() = nodeRepository.ourNodeInfo
+    val ourNodeInfo: StateFlow<Node?> = nodeRepository.ourNodeInfo
+
+    val bluetoothState = bluetoothRepository.state
 
     private val _hasShownNotPairedWarning = MutableStateFlow(uiPrefs.hasShownNotPairedWarning)
     val hasShownNotPairedWarning: StateFlow<Boolean> = _hasShownNotPairedWarning.asStateFlow()