Incognito mode indicator

app/src/main/java/org/koitharu/kotatsu/utils/IncognitoModeIndicator.kt

@@ -0,0 +1,46 @@
+package org.koitharu.kotatsu.utils
+
+import android.app.Activity
+import android.os.Bundle
+import androidx.appcompat.app.AppCompatActivity
+import androidx.core.content.ContextCompat
+import androidx.lifecycle.flowWithLifecycle
+import androidx.lifecycle.lifecycleScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.flow.flowOn
+import kotlinx.coroutines.flow.launchIn
+import kotlinx.coroutines.flow.onEach
+import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.base.ui.DefaultActivityLifecycleCallbacks
+import org.koitharu.kotatsu.core.prefs.AppSettings
+import org.koitharu.kotatsu.core.prefs.observeAsFlow
+import org.koitharu.kotatsu.utils.ext.getThemeColor
+import javax.inject.Inject
+import javax.inject.Singleton
+
+@Singleton
+class IncognitoModeIndicator @Inject constructor(
+	private val settings: AppSettings,
+) : DefaultActivityLifecycleCallbacks {
+
+	override fun onActivityCreated(activity: Activity, savedInstanceState: Bundle?) {
+		if (activity !is AppCompatActivity) {
+			return
+		}
+		settings.observeAsFlow(
+			key = AppSettings.KEY_INCOGNITO_MODE,
+			valueProducer = { isIncognitoModeEnabled },
+		).flowOn(Dispatchers.IO)
+			.flowWithLifecycle(activity.lifecycle)
+			.onEach { updateStatusBar(activity, it) }
+			.launchIn(activity.lifecycleScope)
+	}
+
+	private fun updateStatusBar(activity: AppCompatActivity, isIncognitoModeEnabled: Boolean) {
+		activity.window.statusBarColor = if (isIncognitoModeEnabled) {
+			ContextCompat.getColor(activity, R.color.status_bar_incognito)
+		} else {
+			activity.getThemeColor(android.R.attr.statusBarColor)
+		}
+	}
+}