Setup multiplatform settings with KMP and theme

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

gradle/libs.versions.toml

@@ -55,6 +55,7 @@ runner = "1.7.0"
 rxandroid = "3.0.2"
 rxbinding = "4.0.0"
 rxjava = "3.1.12"
+settings = "1.3.0"
 sonarqube = "7.3.0.8198"
 statesaver = "1.4.1" # TODO: Drop because it is deprecated and incompatible with KSP2
 stetho = "1.6.0"
@@ -156,6 +157,7 @@ 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" }

shared/build.gradle.kts

@@ -15,6 +15,9 @@ kotlin {
     jvmToolchain(21)
 
     compilerOptions {
+        freeCompilerArgs.addAll(
+            "-Xexpect-actual-classes"
+        )
         optIn.addAll(
             "androidx.compose.material3.ExperimentalMaterial3Api",
             "androidx.compose.material3.ExperimentalMaterial3ExpressiveApi",
@@ -80,6 +83,8 @@ kotlin {
 
                 implementation(libs.koin.compose.viewmodel)
                 implementation(libs.koin.annotations)
+
+                implementation(libs.russhwolf.settings)
             }
         }
         commonTest.dependencies {
@@ -89,6 +94,7 @@ kotlin {
         androidMain.dependencies {
             implementation(libs.jetbrains.compose.preview)
             implementation(libs.androidx.activity)
+            implementation(libs.androidx.preference)
         }
         val androidDeviceTest by getting {
             dependencies {

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

@@ -7,11 +7,15 @@
 package net.newpipe.app.theme
 
 import androidx.compose.foundation.isSystemInDarkTheme
+import androidx.compose.material3.ColorScheme
 import androidx.compose.material3.MaterialExpressiveTheme
-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 androidx.compose.ui.platform.LocalInspectionMode
+import com.russhwolf.settings.Settings
+import org.koin.compose.koinInject
 
 private val lightScheme = lightColorScheme(
     primary = primaryLight,
@@ -89,13 +93,43 @@ private val darkScheme = darkColorScheme(
     surfaceContainerHighest = surfaceContainerHighestDark
 )
 
+private val blackScheme = darkScheme.copy(surface = Color.Black)
+
+/**
+ * Gets current color scheme chosen by the user
+ */
 @Composable
-fun AppTheme(useDarkTheme: Boolean = isSystemInDarkTheme(), content: @Composable () -> Unit) {
+fun currentColorScheme(
+    useDarkTheme: Boolean = isSystemInDarkTheme(),
+    settings: Settings = koinInject()
+): ColorScheme {
+    val nightScheme = when (settings.getString("night_theme", "dark_theme")) {
+        "black_theme" -> blackScheme
+        else -> darkScheme
+    }
+
+    return when (settings.getString("theme", "auto_device_theme")) {
+        "light_theme" -> lightScheme
+        "dark_theme" -> darkScheme
+        "black_theme" -> blackScheme
+        else -> if (!useDarkTheme) lightScheme else nightScheme
+    }
+}
+
+/**
+ * Default app theme for the NewPipe composables
+ * @param isPreview Whether the theme is being used in preview mode
+ * @param colorScheme Color scheme to use for theme, defaults to light in preview mode
+ * @param content Composable content to show to the user
+ */
+@Composable
+fun AppTheme(
+    isPreview: Boolean = LocalInspectionMode.current,
+    colorScheme: ColorScheme = if (isPreview) lightScheme else currentColorScheme(),
+    content: @Composable () -> Unit
+) {
     MaterialExpressiveTheme(
-        colorScheme = when {
-            !useDarkTheme -> lightScheme
-            else -> darkScheme
-        },
+        colorScheme = colorScheme,
         content = content
     )
 }