feat(settings): wire "Use wallpaper colors" switch to AppPreferences

app/src/androidTest/java/de/pyryco/mobile/ui/settings/SettingsScreenTest.kt

@@ -24,7 +24,9 @@ class SettingsScreenTest {
             PyrycodeMobileTheme {
                 SettingsScreen(
                     themeMode = ThemeMode.SYSTEM,
+                    useWallpaperColors = false,
                     onSelectTheme = {},
+                    onToggleUseWallpaperColors = {},
                     onBack = {},
                     onOpenLicense = {},
                     onOpenArchivedDiscussions = {},
@@ -44,7 +46,9 @@ class SettingsScreenTest {
             PyrycodeMobileTheme {
                 SettingsScreen(
                     themeMode = ThemeMode.SYSTEM,
+                    useWallpaperColors = false,
                     onSelectTheme = {},
+                    onToggleUseWallpaperColors = {},
                     onBack = {},
                     onOpenLicense = {},
                     onOpenArchivedDiscussions = {},

app/src/main/java/de/pyryco/mobile/MainActivity.kt

@@ -200,9 +200,12 @@ private fun PyryNavHost(
         composable(Routes.SETTINGS) {
             val vm = koinViewModel<SettingsViewModel>()
             val themeMode by vm.themeMode.collectAsStateWithLifecycle()
+            val useWallpaperColors by vm.useWallpaperColors.collectAsStateWithLifecycle()
             SettingsScreen(
                 themeMode = themeMode,
+                useWallpaperColors = useWallpaperColors,
                 onSelectTheme = vm::onSelectTheme,
+                onToggleUseWallpaperColors = vm::onToggleUseWallpaperColors,
                 onBack = { navController.popBackStack() },
                 onOpenLicense = { navController.navigate(Routes.LICENSE) },
                 onOpenArchivedDiscussions = { navController.navigate(Routes.ARCHIVED_DISCUSSIONS) },

app/src/main/java/de/pyryco/mobile/ui/settings/SettingsScreen.kt

@@ -2,6 +2,7 @@ package de.pyryco.mobile.ui.settings
 
 import android.content.Intent
 import android.net.Uri
+import android.os.Build
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.PaddingValues
@@ -47,12 +48,15 @@ import de.pyryco.mobile.ui.theme.PyrycodeMobileTheme
 @Composable
 fun SettingsScreen(
     themeMode: ThemeMode,
+    useWallpaperColors: Boolean,
     onSelectTheme: (ThemeMode) -> Unit,
+    onToggleUseWallpaperColors: (Boolean) -> Unit,
     onBack: () -> Unit,
     onOpenLicense: () -> Unit,
     onOpenArchivedDiscussions: () -> Unit,
     modifier: Modifier = Modifier,
 ) {
+    val dynamicColorSupported = Build.VERSION.SDK_INT >= Build.VERSION_CODES.S
     Scaffold(
         modifier = modifier,
         topBar = {
@@ -70,7 +74,6 @@ fun SettingsScreen(
         },
     ) { inner ->
         val context = LocalContext.current
-        var materialYou by remember { mutableStateOf(true) }
         var defaultYolo by remember { mutableStateOf(false) }
         var pushNotifications by remember { mutableStateOf(true) }
         var showThemeDialog by remember { mutableStateOf(false) }
@@ -115,9 +118,19 @@ fun SettingsScreen(
                 onClick = { showThemeDialog = true },
             )
             SettingsRow(
-                headline = "Use Material You dynamic color",
+                headline = stringResource(R.string.settings_use_wallpaper_colors),
+                supporting =
+                    if (!dynamicColorSupported) {
+                        stringResource(R.string.settings_use_wallpaper_colors_unsupported)
+                    } else {
+                        null
+                    },
                 trailing = {
-                    Switch(checked = materialYou, onCheckedChange = { materialYou = it })
+                    Switch(
+                        checked = useWallpaperColors,
+                        onCheckedChange = onToggleUseWallpaperColors,
+                        enabled = dynamicColorSupported,
+                    )
                 },
             )
 
@@ -291,7 +304,9 @@ private fun SettingsScreenLightPreview() {
     PyrycodeMobileTheme(darkTheme = false) {
         SettingsScreen(
             themeMode = ThemeMode.SYSTEM,
+            useWallpaperColors = false,
             onSelectTheme = {},
+            onToggleUseWallpaperColors = {},
             onBack = {},
             onOpenLicense = {},
             onOpenArchivedDiscussions = {},
@@ -305,7 +320,9 @@ private fun SettingsScreenDarkPreview() {
     PyrycodeMobileTheme(darkTheme = true) {
         SettingsScreen(
             themeMode = ThemeMode.SYSTEM,
+            useWallpaperColors = false,
             onSelectTheme = {},
+            onToggleUseWallpaperColors = {},
             onBack = {},
             onOpenLicense = {},
             onOpenArchivedDiscussions = {},

app/src/main/java/de/pyryco/mobile/ui/settings/SettingsViewModel.kt

@@ -19,10 +19,21 @@ class SettingsViewModel(
             initialValue = ThemeMode.SYSTEM,
         )
 
+    val useWallpaperColors: StateFlow<Boolean> =
+        appPreferences.useWallpaperColors.stateIn(
+            scope = viewModelScope,
+            started = SharingStarted.WhileSubscribed(STOP_TIMEOUT_MILLIS),
+            initialValue = false,
+        )
+
     fun onSelectTheme(mode: ThemeMode) {
         viewModelScope.launch { appPreferences.setThemeMode(mode) }
     }
 
+    fun onToggleUseWallpaperColors(enabled: Boolean) {
+        viewModelScope.launch { appPreferences.setUseWallpaperColors(enabled) }
+    }
+
     private companion object {
         const val STOP_TIMEOUT_MILLIS = 5_000L
     }

app/src/main/res/values/strings.xml

@@ -23,6 +23,8 @@
     <string name="promote_dialog_confirm">Save as channel</string>
     <string name="promote_dialog_cancel">Cancel</string>
     <string name="settings_theme_dialog_title">Theme</string>
+    <string name="settings_use_wallpaper_colors">Use wallpaper colors</string>
+    <string name="settings_use_wallpaper_colors_unsupported">Requires Android 12 or newer</string>
     <string name="archived_discussions_title">Archived discussions</string>
     <string name="archived_discussions_empty">No archived discussions</string>
     <string name="archived_discussions_settings_row">Archived discussions</string>

app/src/test/java/de/pyryco/mobile/ui/settings/SettingsViewModelTest.kt

@@ -116,4 +116,46 @@ class SettingsViewModelTest {
             assertEquals(ThemeMode.LIGHT, vm.themeMode.value)
             collector.cancel()
         }
+
+    @Test
+    fun useWallpaperColors_initialState_emitsFalse_whenNoStoredValue() =
+        runTest(dispatcher) {
+            val prefs = AppPreferences(newDataStore())
+            val vm = SettingsViewModel(prefs)
+            val collector = launch { vm.useWallpaperColors.collect { } }
+            advanceUntilIdle()
+            assertEquals(false, vm.useWallpaperColors.value)
+            collector.cancel()
+        }
+
+    @Test
+    fun useWallpaperColors_initialState_mirrorsPersistedTrue() =
+        runTest(dispatcher) {
+            val prefs = AppPreferences(newDataStore())
+            prefs.setUseWallpaperColors(true)
+            advanceUntilIdle()
+            val vm = SettingsViewModel(prefs)
+            val collector = launch { vm.useWallpaperColors.collect { } }
+            advanceUntilIdle()
+            assertEquals(true, vm.useWallpaperColors.value)
+            collector.cancel()
+        }
+
+    @Test
+    fun onToggleUseWallpaperColors_persistsAndFlowReEmits() =
+        runTest(dispatcher) {
+            val prefs = AppPreferences(newDataStore())
+            val vm = SettingsViewModel(prefs)
+            val collector = launch { vm.useWallpaperColors.collect { } }
+            advanceUntilIdle()
+            vm.onToggleUseWallpaperColors(true)
+            advanceUntilIdle()
+            assertEquals(true, prefs.useWallpaperColors.first())
+            assertEquals(true, vm.useWallpaperColors.value)
+            vm.onToggleUseWallpaperColors(false)
+            advanceUntilIdle()
+            assertEquals(false, prefs.useWallpaperColors.first())
+            assertEquals(false, vm.useWallpaperColors.value)
+            collector.cancel()
+        }
 }