feat: send notifs when install ready if backgrounded

app/src/main/AndroidManifest.xml

@@ -4,6 +4,7 @@
 
   <uses-permission android:name="android.permission.INTERNET" />
   <uses-permission android:name="android.permission.WAKE_LOCK" />
+  <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
   <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
   <uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES" />
   <uses-permission android:name="android.permission.REQUEST_DELETE_PACKAGES" />
@@ -41,6 +42,7 @@
     <activity
         android:name=".MainActivity"
         android:exported="true"
+        android:launchMode="singleTask"
         android:theme="@style/Theme.AliucordManager.SplashScreen">
       <intent-filter>
         <action android:name="android.intent.action.MAIN" />

app/src/main/kotlin/com/aliucord/manager/installer/steps/StepRunner.kt

@@ -1,7 +1,12 @@
 package com.aliucord.manager.installer.steps
 
+import android.content.Context
+import androidx.lifecycle.Lifecycle
+import androidx.lifecycle.ProcessLifecycleOwner
+import com.aliucord.manager.R
 import com.aliucord.manager.installer.steps.base.Step
 import com.aliucord.manager.manager.PreferencesManager
+import com.aliucord.manager.ui.util.InstallNotifications
 import kotlinx.collections.immutable.ImmutableList
 import kotlinx.coroutines.delay
 import org.koin.core.component.KoinComponent
@@ -14,7 +19,10 @@ import org.koin.core.component.inject
  */
 const val MINIMUM_STEP_DELAY: Long = 600L
 
+const val ERROR_NOTIF_ID = 200002
+
 abstract class StepRunner : KoinComponent {
+    private val context: Context by inject()
     private val preferences: PreferencesManager by inject()
 
     abstract val steps: ImmutableList<Step>
@@ -39,7 +47,10 @@ abstract class StepRunner : KoinComponent {
     suspend fun executeAll(): Throwable? {
         for (step in steps) {
             val error = step.executeCatching(this@StepRunner)
-            if (error != null) return error
+            if (error != null) {
+                showErrorNotification()
+                return error
+            }
 
             // Skip minimum run time when in dev mode
             if (!preferences.devMode && step.durationMs < MINIMUM_STEP_DELAY) {
@@ -49,4 +60,16 @@ abstract class StepRunner : KoinComponent {
 
         return null
     }
+
+    private fun showErrorNotification() {
+        // If app backgrounded
+        if (ProcessLifecycleOwner.get().lifecycle.currentState == Lifecycle.State.CREATED) {
+            InstallNotifications.createNotification(
+                context = context,
+                id = ERROR_NOTIF_ID,
+                title = R.string.notif_install_fail_title,
+                description = R.string.notif_install_fail_desc,
+            )
+        }
+    }
 }

app/src/main/kotlin/com/aliucord/manager/installer/steps/install/InstallStep.kt

@@ -1,5 +1,7 @@
 package com.aliucord.manager.installer.steps.install
 
+import android.content.Context
+import androidx.lifecycle.*
 import com.aliucord.manager.R
 import com.aliucord.manager.installer.steps.StepGroup
 import com.aliucord.manager.installer.steps.StepRunner
@@ -9,13 +11,17 @@ import com.aliucord.manager.installer.steps.patch.CopyDependenciesStep
 import com.aliucord.manager.installers.InstallerResult
 import com.aliucord.manager.manager.InstallerManager
 import com.aliucord.manager.manager.PreferencesManager
+import com.aliucord.manager.ui.util.InstallNotifications
 import org.koin.core.component.KoinComponent
 import org.koin.core.component.inject
 
+private const val READY_NOTIF_ID = 200001
+
 /**
  * Install the final APK with the system's PackageManager.
  */
 class InstallStep : Step(), KoinComponent {
+    private val context: Context by inject()
     private val installers: InstallerManager by inject()
     private val prefs: PreferencesManager by inject()
 
@@ -25,6 +31,19 @@ class InstallStep : Step(), KoinComponent {
     override suspend fun execute(container: StepRunner) {
         val apk = container.getStep<CopyDependenciesStep>().patchedApk
 
+        // If app backgrounded, show notification
+        if (ProcessLifecycleOwner.get().lifecycle.currentState == Lifecycle.State.CREATED) {
+            InstallNotifications.createNotification(
+                context = context,
+                id = READY_NOTIF_ID,
+                title = R.string.notif_install_ready_title,
+                description = R.string.notif_install_ready_desc,
+            )
+        }
+
+        // Wait until app resumed
+        ProcessLifecycleOwner.get().lifecycle.withResumed {}
+
         val result = installers.getActiveInstaller().waitInstall(
             apks = listOf(apk),
             silent = !prefs.devMode,

app/src/main/kotlin/com/aliucord/manager/ui/components/Wakelock.kt

@@ -1,12 +1,10 @@
 package com.aliucord.manager.ui.components
 
-import android.app.Activity
-import android.content.Context
-import android.content.ContextWrapper
 import android.view.WindowManager
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.DisposableEffect
 import androidx.compose.ui.platform.LocalContext
+import com.aliucord.manager.util.findActivity
 
 /**
  * Maintain an active screen wakelock as long as [active] is true and this component is in scope.
@@ -28,12 +26,3 @@ fun Wakelock(active: Boolean = false) {
         }
     }
 }
-
-private fun Context.findActivity(): Activity? {
-    var context = this
-    while (context is ContextWrapper) {
-        if (context is Activity) return context
-        context = context.baseContext
-    }
-    return null
-}

app/src/main/kotlin/com/aliucord/manager/ui/screens/installopts/InstallOptionsScreen.kt

@@ -8,6 +8,7 @@ import androidx.compose.runtime.*
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.alpha
+import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.style.TextAlign
@@ -33,9 +34,14 @@ class InstallOptionsScreen(
 
     @Composable
     override fun Content() {
+        val context = LocalContext.current
         val navigator = LocalNavigator.currentOrThrow
         val model = getScreenModel<InstallOptionsModel>()
 
+        LaunchedEffect(Unit) {
+            InstallNotifications.requestPermissions(context)
+        }
+
         Scaffold(
             topBar = { InstallOptionsAppBar() },
         ) { paddingValues ->

app/src/main/kotlin/com/aliucord/manager/ui/util/InstallNotifications.kt

@@ -0,0 +1,87 @@
+package com.aliucord.manager.ui.util
+
+import android.Manifest
+import android.app.*
+import android.content.Context
+import android.content.Intent
+import android.content.pm.PackageManager
+import android.os.Build
+import android.util.Log
+import androidx.annotation.StringRes
+import androidx.core.app.*
+import androidx.core.content.ContextCompat
+import com.aliucord.manager.*
+import com.aliucord.manager.util.findActivity
+
+object InstallNotifications {
+    private const val CHANNEL_ID = "installation"
+
+    /**
+     * Creates or replaces a notification with id [id] that brings
+     * up the existing [MainActivity] when clicked upon.
+     *
+     * @param id A unique notification ID for different notifications
+     * @param title Main notification title
+     * @param description Notification description
+     */
+    fun createNotification(
+        context: Context,
+        id: Int,
+        @StringRes title: Int,
+        @StringRes description: Int,
+    ) {
+        val manager = NotificationManagerCompat.from(context)
+
+        // Create the target notification channel
+        if (Build.VERSION.SDK_INT >= 26 && manager.getNotificationChannel(CHANNEL_ID) == null) {
+            val channel = NotificationChannelCompat.Builder(CHANNEL_ID, NotificationManager.IMPORTANCE_HIGH)
+                .setName(context.getString(R.string.notif_group_install_title))
+                .setDescription(context.getString(R.string.notif_group_install_desc))
+                .build()
+
+            manager.createNotificationChannel(channel)
+        }
+
+        val notification = NotificationCompat.Builder(context, CHANNEL_ID)
+            .setDefaults(Notification.DEFAULT_LIGHTS or Notification.DEFAULT_SOUND)
+            .setAutoCancel(true)
+            .setSmallIcon(R.drawable.ic_aliucord_logo)
+            .setContentTitle(context.getString(title))
+            .setContentText(context.getString(description))
+            .setContentIntent(
+                PendingIntent.getActivity(
+                    /* context = */ context,
+                    /* requestCode = */ 0,
+                    /* intent = */
+                    Intent(context, MainActivity::class.java)
+                        .addFlags(Intent.FLAG_ACTIVITY_BROUGHT_TO_FRONT),
+                    /* flags = */ PendingIntent.FLAG_IMMUTABLE,
+                )
+            )
+            .build()
+
+        try {
+            manager.notify(id, notification)
+        } catch (e: SecurityException) {
+            Log.w(BuildConfig.TAG, "Failed to send install notification", e)
+        }
+    }
+
+    /**
+     * Request the `POST_NOTIFICATIONS` permission if needed.
+     */
+    fun requestPermissions(context: Context) {
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.TIRAMISU) return
+
+        val granted = ContextCompat.checkSelfPermission(context, Manifest.permission.POST_NOTIFICATIONS)
+        val activity = context.findActivity() ?: return
+
+        if (granted != PackageManager.PERMISSION_GRANTED) {
+            ActivityCompat.requestPermissions(
+                activity,
+                arrayOf(Manifest.permission.POST_NOTIFICATIONS),
+                0,
+            )
+        }
+    }
+}

app/src/main/kotlin/com/aliucord/manager/util/Context.kt

@@ -1,5 +1,6 @@
 package com.aliucord.manager.util
 
+import android.app.Activity
 import android.content.*
 import android.os.Environment
 import android.util.Log
@@ -44,3 +45,12 @@ fun Context.getPackageVersion(pkg: String): Pair<String, Int> {
     return packageManager.getPackageInfo(pkg, 0)
         .let { it.versionName to it.versionCode }
 }
+
+fun Context.findActivity(): Activity? {
+    var context = this
+    while (context is ContextWrapper) {
+        if (context is Activity) return context
+        context = context.baseContext
+    }
+    return null
+}

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

@@ -146,4 +146,11 @@
   <string name="installopts_icon_desc">Changes the app\'s icon to use Aliucord branding instead of Discord\'s own.</string>
   <string name="installopts_divider_basic">Basic</string>
   <string name="installopts_divider_advanced">Advanced</string>
+
+  <string name="notif_group_install_title">Active installation</string>
+  <string name="notif_group_install_desc">Progress notifications sent during a minimized installation</string>
+  <string name="notif_install_ready_title">Aliucord installation ready!</string>
+  <string name="notif_install_ready_desc">Click to install…</string>
+  <string name="notif_install_fail_title">Aliucord failed to install</string>
+  <string name="notif_install_fail_desc">Click to view more info…</string>
 </resources>

gradle/libs.versions.toml

@@ -29,6 +29,7 @@ accompanist-systemUiController = { module = "com.google.accompanist:accompanist-
 # AndroidX
 androidx-activity = { module = "androidx.activity:activity-compose", version.ref = "androidx-activity" }
 androidx-lifecycle = { module = "androidx.lifecycle:lifecycle-runtime-compose", version.ref = "androidx-lifecycle" }
+androidx-lifecycle-process = { module = "androidx.lifecycle:lifecycle-process", version.ref = "androidx-lifecycle" }
 androidx-core = { module = "androidx.core:core-ktx", version.ref = "androidx-core" }
 androidx-splashscreen = { module = "androidx.core:core-splashscreen", version.ref = "androidx-splashscreen" }
 
@@ -80,6 +81,7 @@ androidx = [
     "androidx-core",
     "androidx-activity",
     "androidx-lifecycle",
+    "androidx-lifecycle-process",
     "androidx-splashscreen",
 ]
 compose = [