feat: add exit confirmation dialog on back navigation

app-tv/src/main/java/hu/bbara/purefin/tv/TvActivity.kt

@@ -3,6 +3,7 @@ package hu.bbara.purefin.tv
 import android.content.pm.ApplicationInfo
 import android.os.Bundle
 import android.widget.Toast
+import androidx.activity.compose.BackHandler
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
 import androidx.activity.enableEdgeToEdge
@@ -50,6 +51,7 @@ import hu.bbara.purefin.core.jellyfin.JellyfinAuthInterceptor
 import hu.bbara.purefin.core.navigation.NavigationCommand
 import hu.bbara.purefin.core.navigation.NavigationManager
 import hu.bbara.purefin.core.navigation.Route
+import hu.bbara.purefin.ui.common.dialog.ExitAppDialog
 import hu.bbara.purefin.navigation.LocalNavigationBackStack
 import hu.bbara.purefin.navigation.LocalNavigationManager
 import hu.bbara.purefin.ui.screen.login.TvLoginScreen
@@ -147,6 +149,7 @@ class TvActivity : ComponentActivity() {
         updateViewModel: AppUpdateViewModel = hiltViewModel()
     ) {
         var sessionLoaded by remember { mutableStateOf(false) }
+        var showExitDialog by remember { mutableStateOf(false) }
         val isLoggedIn by userSessionRepository.isLoggedIn.collectAsStateWithLifecycle(initialValue = false)
         val availableUpdate by updateViewModel.availableUpdate.collectAsStateWithLifecycle()
         val context = LocalContext.current
@@ -168,6 +171,9 @@ class TvActivity : ComponentActivity() {
         }
 
         if (!sessionLoaded) {
+            BackHandler {
+                showExitDialog = true
+            }
             PurefinWaitingScreen(modifier = Modifier.fillMaxSize())
         } else if (isLoggedIn) {
             @Suppress("UNCHECKED_CAST")
@@ -179,7 +185,13 @@ class TvActivity : ComponentActivity() {
             LaunchedEffect(navigationManager, backStack) {
                 navigationManager.commands.collect { command ->
                     when (command) {
-                        NavigationCommand.Pop -> if (backStack.size > 1) backStack.removeLastOrNull()
+                        NavigationCommand.Pop -> {
+                            if (backStack.size > 1) {
+                                backStack.removeLastOrNull()
+                            } else {
+                                showExitDialog = true
+                            }
+                        }
                         is NavigationCommand.Navigate -> backStack.add(command.route)
                         is NavigationCommand.ReplaceAll -> {
                             backStack.clear()
@@ -189,13 +201,23 @@ class TvActivity : ComponentActivity() {
                 }
             }
 
+            BackHandler(enabled = backStack.size == 1) {
+                showExitDialog = true
+            }
+
             CompositionLocalProvider(
                 LocalNavigationManager provides navigationManager,
                 LocalNavigationBackStack provides backStack.toList()
             ) {
                 NavDisplay(
                     backStack = backStack,
-                    onBack = { navigationManager.pop() },
+                    onBack = {
+                        if (backStack.size > 1) {
+                            navigationManager.pop()
+                        } else {
+                            showExitDialog = true
+                        }
+                    },
                     modifier = Modifier.fillMaxSize().background(backgroundDark),
                     transitionSpec = {
                         fadeIn(
@@ -229,6 +251,9 @@ class TvActivity : ComponentActivity() {
                 )
             }
         } else {
+            BackHandler {
+                showExitDialog = true
+            }
             TvLoginScreen()
         }
 
@@ -239,6 +264,13 @@ class TvActivity : ComponentActivity() {
                 onDecline = updateViewModel::declineUpdate
             )
         }
+
+        if (showExitDialog) {
+            ExitAppDialog(
+                onCloseConfirmed = { finishAndRemoveTask() },
+                onDismiss = { showExitDialog = false }
+            )
+        }
     }
 
     @Composable

app-tv/src/main/java/hu/bbara/purefin/ui/screen/TvAppScreen.kt

@@ -1,5 +1,6 @@
 package hu.bbara.purefin.ui.screen
 
+import androidx.activity.compose.BackHandler
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.outlined.Home
@@ -102,6 +103,10 @@ fun TvAppScreen(
         }
     }
 
+    BackHandler(enabled = backStack.size == 1) {
+        navigationManager.pop()
+    }
+
     TvNavigationDrawer(
         destinations = destinations,
         selectedDestination = selectedDestination,

app/src/main/java/hu/bbara/purefin/PurefinActivity.kt

@@ -2,6 +2,7 @@ package hu.bbara.purefin
 
 import android.content.pm.ApplicationInfo
 import android.os.Bundle
+import androidx.activity.compose.BackHandler
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
 import androidx.activity.enableEdgeToEdge
@@ -51,6 +52,7 @@ import hu.bbara.purefin.navigation.LocalSharedTransitionScope
 import hu.bbara.purefin.core.navigation.NavigationCommand
 import hu.bbara.purefin.core.navigation.NavigationManager
 import hu.bbara.purefin.core.navigation.Route
+import hu.bbara.purefin.ui.common.dialog.ExitAppDialog
 import hu.bbara.purefin.ui.screen.waiting.PurefinWaitingScreen
 import hu.bbara.purefin.ui.screen.login.LoginScreen
 import hu.bbara.purefin.ui.theme.AppTheme
@@ -146,6 +148,7 @@ class PurefinActivity : ComponentActivity() {
         navigationManager: NavigationManager
     ) {
         var sessionLoaded by remember { mutableStateOf(false) }
+        var showExitDialog by remember { mutableStateOf(false) }
         val isLoggedIn by userSessionRepository.isLoggedIn.collectAsStateWithLifecycle(initialValue = false)
 
         LaunchedEffect(Unit) {
@@ -155,11 +158,11 @@ class PurefinActivity : ComponentActivity() {
         }
 
         if (!sessionLoaded) {
+            BackHandler {
+                showExitDialog = true
+            }
             PurefinWaitingScreen(modifier = Modifier.fillMaxSize())
-            return
+        } else if (isLoggedIn) {
-        }
-
-        if (isLoggedIn) {
             @Suppress("UNCHECKED_CAST")
             val backStack = rememberNavBackStack(Route.Home) as NavBackStack<Route>
             var homeMediaSharedBoundsKey by remember { mutableStateOf<String?>(null) }
@@ -171,7 +174,13 @@ class PurefinActivity : ComponentActivity() {
             LaunchedEffect(navigationManager, backStack) {
                 navigationManager.commands.collect { command ->
                     when (command) {
-                        NavigationCommand.Pop -> if (backStack.size > 1) backStack.removeLastOrNull()
+                        NavigationCommand.Pop -> {
+                            if (backStack.size > 1) {
+                                backStack.removeLastOrNull()
+                            } else {
+                                showExitDialog = true
+                            }
+                        }
                         is NavigationCommand.Navigate -> backStack.add(command.route)
                         is NavigationCommand.ReplaceAll -> {
                             backStack.clear()
@@ -181,6 +190,10 @@ class PurefinActivity : ComponentActivity() {
                 }
             }
 
+            BackHandler(enabled = backStack.size == 1) {
+                showExitDialog = true
+            }
+
             SharedTransitionLayout {
                 CompositionLocalProvider(
                     LocalNavigationManager provides navigationManager,
@@ -193,7 +206,13 @@ class PurefinActivity : ComponentActivity() {
                 ) {
                     NavDisplay(
                         backStack = backStack,
-                        onBack = { navigationManager.pop() },
+                        onBack = {
+                            if (backStack.size > 1) {
+                                navigationManager.pop()
+                            } else {
+                                showExitDialog = true
+                            }
+                        },
                         modifier = Modifier
                             .fillMaxSize()
                             .background(backgroundDark)
@@ -232,9 +251,19 @@ class PurefinActivity : ComponentActivity() {
                 }
             }
         } else {
+            BackHandler {
+                showExitDialog = true
+            }
             LoginScreen(
                 modifier = Modifier.semantics { testTagsAsResourceId = true }
             )
         }
+
+        if (showExitDialog) {
+            ExitAppDialog(
+                onCloseConfirmed = { finishAndRemoveTask() },
+                onDismiss = { showExitDialog = false }
+            )
+        }
     }
 }

app/src/main/java/hu/bbara/purefin/ui/screen/AppScreen.kt

@@ -1,5 +1,6 @@
 package hu.bbara.purefin.ui.screen
 
+import androidx.activity.compose.BackHandler
 import androidx.compose.animation.core.tween
 import androidx.compose.animation.fadeIn
 import androidx.compose.animation.fadeOut
@@ -138,6 +139,10 @@ fun AppScreen(
         }
     }
 
+    BackHandler(enabled = backStack.size == 1) {
+        navigationManager.pop()
+    }
+
     NavDisplay(
         backStack = backStack,
         onBack = {

core-ui/src/main/java/hu/bbara/purefin/ui/common/dialog/ExitAppDialog.kt

@@ -0,0 +1,28 @@
+package hu.bbara.purefin.ui.common.dialog
+
+import androidx.compose.material3.AlertDialog
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.runtime.Composable
+
+@Composable
+fun ExitAppDialog(
+    onCloseConfirmed: () -> Unit,
+    onDismiss: () -> Unit
+) {
+    AlertDialog(
+        onDismissRequest = onDismiss,
+        title = { Text("Close app?") },
+        text = { Text("Are you sure?") },
+        confirmButton = {
+            TextButton(onClick = onCloseConfirmed) {
+                Text("Close")
+            }
+        },
+        dismissButton = {
+            TextButton(onClick = onDismiss) {
+                Text("Cancel")
+            }
+        }
+    )
+}