Setup multiplatform settings with KMP and theme

Signed-off-by: Aayush Gupta <aayushgupta219@gmail.com>

Author: theimpulson

composeApp/build.gradle.kts

@@ -49,22 +49,22 @@ kotlin {
             implementation(libs.jetbrains.lifecycle.viewmodel)
 
             // Koin
-            implementation(project.dependencies.platform(libs.koin.bom))
             api(libs.koin.annotations)
             implementation(libs.koin.core)
             implementation(libs.koin.compose)
             implementation(libs.koin.viewmodel)
+
+            // Settings
+            implementation(libs.russhwolf.settings)
         }
         commonTest.dependencies {
             implementation(libs.kotlin.test)
-
-            // Koin
-            implementation(project.dependencies.platform(libs.koin.bom))
             implementation(libs.koin.test)
         }
         androidMain.dependencies {
             implementation(compose.preview)
             implementation(libs.androidx.activity)
+            implementation(libs.androidx.preference)
         }
         jvmMain.dependencies {
             implementation(compose.desktop.currentOs)

composeApp/src/androidMain/kotlin/net/newpipe/app/module/Koin.android.kt

@@ -0,0 +1,18 @@
+/*
+ * SPDX-FileCopyrightText: 2026 NewPipe e.V. <https://newpipe-ev.de>
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+package net.newpipe.app.module
+
+import androidx.preference.PreferenceManager
+import com.russhwolf.settings.Settings
+import com.russhwolf.settings.SharedPreferencesSettings
+import org.koin.android.ext.koin.androidContext
+import org.koin.dsl.module
+
+actual val platformModule = module {
+    single<Settings> {
+        SharedPreferencesSettings(PreferenceManager.getDefaultSharedPreferences(androidContext()))
+    }
+}

composeApp/src/commonMain/kotlin/net/newpipe/app/App.kt

@@ -6,7 +6,7 @@
 package net.newpipe.app
 
 import androidx.compose.runtime.Composable
-import net.newpipe.app.module.appModules
+import net.newpipe.app.module.platformModule
 import net.newpipe.app.theme.AppTheme
 import org.koin.compose.KoinMultiplatformApplication
 import org.koin.core.annotation.KoinExperimentalAPI
@@ -17,7 +17,7 @@ import org.koin.dsl.koinConfiguration
 fun App() {
     KoinMultiplatformApplication(
         config = koinConfiguration {
-            modules(appModules)
+            modules(platformModule)
         }
     ) {
         AppTheme {

composeApp/src/commonMain/kotlin/net/newpipe/app/module/Koin.kt

@@ -5,8 +5,9 @@
 
 package net.newpipe.app.module
 
-import org.koin.dsl.module
+import org.koin.core.module.Module
 
-val appModules = module {
-
-}
+/**
+ * Contains platform specific module; See actual implementation for more details
+ */
+expect val platformModule: Module

composeApp/src/commonMain/kotlin/net/newpipe/app/theme/Theme.kt

@@ -11,6 +11,9 @@ import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.darkColorScheme
 import androidx.compose.material3.lightColorScheme
 import androidx.compose.runtime.Composable
+import androidx.compose.ui.graphics.Color
+import com.russhwolf.settings.Settings
+import org.koin.compose.koinInject
 
 private val lightScheme = lightColorScheme(
     primary = primaryLight,
@@ -88,12 +91,25 @@ private val darkScheme = darkColorScheme(
     surfaceContainerHighest = surfaceContainerHighestDark,
 )
 
+private val blackScheme = darkScheme.copy(surface = Color.Black)
+
 @Composable
-fun AppTheme(useDarkTheme: Boolean = isSystemInDarkTheme(), content: @Composable () -> Unit) {
+fun AppTheme(
+    useDarkTheme: Boolean = isSystemInDarkTheme(),
+    settings: Settings = koinInject(),
+    content: @Composable () -> Unit
+) {
+    val nightScheme = when(settings.getString("night_theme", "dark_theme")) {
+        "black_theme" -> blackScheme
+        else -> darkScheme
+    }
+
     MaterialTheme(
-        colorScheme = when {
-            !useDarkTheme -> lightScheme
-            else -> darkScheme
+        colorScheme = when(settings.getString("theme", "auto_device_theme")) {
+            "light_theme" -> lightScheme
+            "dark_theme" -> darkScheme
+            "black_theme" -> blackScheme
+            else -> if (!useDarkTheme) lightScheme else nightScheme
         },
         content = content
     )

composeApp/src/iosMain/kotlin/net/newpipe/app/module/Koin.ios.kt

@@ -0,0 +1,17 @@
+/*
+ * SPDX-FileCopyrightText: 2026 NewPipe e.V. <https://newpipe-ev.de>
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+package net.newpipe.app.module
+
+import com.russhwolf.settings.NSUserDefaultsSettings
+import com.russhwolf.settings.Settings
+import org.koin.dsl.module
+import platform.Foundation.NSUserDefaults
+
+actual val platformModule = module {
+    single<Settings> {
+        NSUserDefaultsSettings(NSUserDefaults())
+    }
+}

composeApp/src/jvmMain/kotlin/net/newpipe/app/module/Koin.jvm.kt

@@ -0,0 +1,17 @@
+/*
+ * SPDX-FileCopyrightText: 2026 NewPipe e.V. <https://newpipe-ev.de>
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+package net.newpipe.app.module
+
+import com.russhwolf.settings.PreferencesSettings
+import com.russhwolf.settings.Settings
+import org.koin.dsl.module
+import java.util.prefs.Preferences
+
+actual val platformModule = module {
+    single<Settings> {
+        PreferencesSettings(Preferences.userRoot())
+    }
+}

gradle/libs.versions.toml

@@ -52,6 +52,7 @@ runner = "1.7.0"
 rxandroid = "3.0.2"
 rxbinding = "4.0.0"
 rxjava = "3.1.12"
+settings = "1.3.0"
 sonarqube = "7.2.1.6560"
 statesaver = "1.4.1" # TODO: Drop because it is deprecated and incompatible with KSP2
 stetho = "1.6.0"
@@ -120,12 +121,11 @@ jetbrains-lifecycle-viewmodel = { module = "org.jetbrains.androidx.lifecycle:lif
 jsoup = { module = "org.jsoup:jsoup", version.ref = "jsoup" }
 junit = { module = "junit:junit", version.ref = "junit" }
 koin-annotations = { module = "io.insert-koin:koin-annotations", version.ref = "koin-annotations" }
-koin-bom = { module = "io.insert-koin:koin-bom", version.ref = "koin-bom" }
 koin-compiler = { module = "io.insert-koin:koin-ksp-compiler", version.ref = "koin-annotations" }
-koin-compose = { module = "io.insert-koin:koin-compose" }
-koin-core = { module = "io.insert-koin:koin-core" }
-koin-test = { module = "io.insert-koin:koin-test" }
-koin-viewmodel = { module = "io.insert-koin:koin-compose-viewmodel" }
+koin-compose = { module = "io.insert-koin:koin-compose", version.ref = "koin-bom" }
+koin-core = { module = "io.insert-koin:koin-core", version.ref = "koin-bom" }
+koin-test = { module = "io.insert-koin:koin-test", version.ref = "koin-bom" }
+koin-viewmodel = { module = "io.insert-koin:koin-compose-viewmodel", version.ref = "koin-bom" }
 kotlin-test = { module = "org.jetbrains.kotlin:kotlin-test", version.ref = "kotlin" }
 lisawray-groupie-core = { module = "com.github.lisawray.groupie:groupie", version.ref = "groupie" }
 lisawray-groupie-viewbinding = { module = "com.github.lisawray.groupie:groupie-viewbinding", version.ref = "groupie" }
@@ -141,6 +141,7 @@ pinterest-ktlint = { module = "com.pinterest.ktlint:ktlint-cli", version.ref = "
 puppycrawl-checkstyle = { module = "com.puppycrawl.tools:checkstyle", version.ref = "checkstyle" }
 reactivex-rxandroid = { module = "io.reactivex.rxjava3:rxandroid", version.ref = "rxandroid" }
 reactivex-rxjava = { module = "io.reactivex.rxjava3:rxjava", version.ref = "rxjava" }
+russhwolf-settings = { module = "com.russhwolf:multiplatform-settings", version.ref = "settings" }
 squareup-leakcanary-core = { module = "com.squareup.leakcanary:leakcanary-android-core", version.ref = "leakcanary" }
 squareup-leakcanary-plumber = { module = "com.squareup.leakcanary:plumber-android", version.ref = "leakcanary" }
 squareup-leakcanary-watcher = { module = "com.squareup.leakcanary:leakcanary-object-watcher-android", version.ref = "leakcanary" }