Add notifications related to UnifiedPush events

app/src/unifiedpush/java/im/molly/unifiedpush/components/settings/app/notifications/UnifiedPushSettingsViewModel.kt

@@ -108,6 +108,8 @@ class UnifiedPushSettingsViewModel(private val application: Application) : ViewM
       } ?: return
     } else {
       UnifiedPush.unregisterApp(application)
+      SignalStore.unifiedpush().airGaped = false
+      SignalStore.unifiedpush().mollySocketUrl = null
       processNewStatus()
     }
   }

app/src/unifiedpush/java/im/molly/unifiedpush/jobs/UnifiedPushRefreshJob.kt

@@ -1,9 +1,11 @@
+
 package im.molly.unifiedpush.jobs
 
 import im.molly.unifiedpush.model.RegistrationStatus
 import im.molly.unifiedpush.model.saveStatus
 import im.molly.unifiedpush.util.MollySocketRequest
 import im.molly.unifiedpush.util.UnifiedPushHelper
+import im.molly.unifiedpush.util.UnifiedPushNotificationBuilder
 import org.signal.core.util.logging.Log
 import org.thoughtcrime.securesms.ApplicationContext
 import org.thoughtcrime.securesms.jobmanager.Data
@@ -46,12 +48,9 @@ class UnifiedPushRefreshJob private constructor(parameters: Parameters) : BaseJo
           Log.w(TAG, "The registration status has changed!")
           status.saveStatus()
           ApplicationContext.getInstance().initializeFcmCheck()
-          // TODO: alert user
+          UnifiedPushNotificationBuilder(context).setNotificationMollySocketRegistrationChanged()
         }
       }
-    } else {
-      ApplicationContext.getInstance().initializeFcmCheck()
-      // TODO: alert user
     }
   }
 

app/src/unifiedpush/java/im/molly/unifiedpush/receiver/UnifiedPushReceiver.kt

@@ -9,6 +9,7 @@ import im.molly.unifiedpush.model.UnifiedPushStatus
 import im.molly.unifiedpush.model.saveStatus
 import im.molly.unifiedpush.util.MollySocketRequest
 import im.molly.unifiedpush.util.UnifiedPushHelper
+import im.molly.unifiedpush.util.UnifiedPushNotificationBuilder
 import org.greenrobot.eventbus.EventBus
 import org.signal.core.util.concurrent.SignalExecutors
 import org.signal.core.util.logging.Log
@@ -32,18 +33,23 @@ class UnifiedPushReceiver : MessagingReceiver() {
       SignalStore.unifiedpush().endpoint = endpoint
       when (SignalStore.unifiedpush().status) {
         UnifiedPushStatus.AIR_GAPED -> {
-          // TODO: alert if air gaped and endpoint changes
           EventBus.getDefault().post(UnifiedPushRegistrationEvent)
+          UnifiedPushNotificationBuilder(context).setNotificationEndpointChangedAirGaped()
+        }
+        UnifiedPushStatus.OK -> {
+          EXECUTOR.enqueue {
+            MollySocketRequest.registerToMollySocketServer().saveStatus()
+            EventBus.getDefault().post(UnifiedPushRegistrationEvent)
+            UnifiedPushNotificationBuilder(context).setNotificationEndpointChangedError()
+          }
         }
         in listOf(
           UnifiedPushStatus.INTERNAL_ERROR,
           UnifiedPushStatus.MISSING_ENDPOINT,
-          UnifiedPushStatus.OK,
         ) -> {
           EXECUTOR.enqueue {
             MollySocketRequest.registerToMollySocketServer().saveStatus()
             EventBus.getDefault().post(UnifiedPushRegistrationEvent)
-            // TODO: alert if status changes from Ok to something else
           }
         }
         else -> {
@@ -55,7 +61,7 @@ class UnifiedPushReceiver : MessagingReceiver() {
 
   override fun onRegistrationFailed(context: Context, instance: String) {
     // called when the registration is not possible, eg. no network
-    // TODO: alert user the registration has failed
+    UnifiedPushNotificationBuilder(context).setNotificationRegistrationFailed()
   }
 
   override fun onUnregistered(context: Context, instance: String) {

app/src/unifiedpush/java/im/molly/unifiedpush/util/UnifiedPushNotificationBuilder.kt

@@ -0,0 +1,46 @@
+package im.molly.unifiedpush.util
+
+import android.app.Notification
+import android.app.NotificationManager
+import android.content.Context
+import androidx.core.app.NotificationCompat
+import org.thoughtcrime.securesms.R
+import org.thoughtcrime.securesms.notifications.NotificationChannels
+
+class UnifiedPushNotificationBuilder(val context: Context) {
+
+  private val NOTIFICATION_ID_UNIFIEDPUSH = 51215
+
+  private val builder: NotificationCompat.Builder = NotificationCompat.Builder(context, NotificationChannels.getInstance().APP_ALERTS)
+    .setSmallIcon(R.drawable.ic_notification)
+    .setContentTitle(context.getString(R.string.UnifiedPushNotificationBuilder__title))
+    .setContentIntent(null)
+    .setPriority(NotificationCompat.PRIORITY_DEFAULT)
+
+  private fun getNotification(content: String): Notification {
+    return builder.setContentText(content).setStyle(
+      NotificationCompat.BigTextStyle()
+        .bigText(content)
+    ).build()
+  }
+
+  fun setNotificationMollySocketRegistrationChanged() {
+    (context.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager)
+      .notify(NOTIFICATION_ID_UNIFIEDPUSH, getNotification(context.getString(R.string.UnifiedPushNotificationBuilder__mollysocket_registration_changed)))
+  }
+
+  fun setNotificationEndpointChangedAirGaped() {
+    (context.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager)
+      .notify(NOTIFICATION_ID_UNIFIEDPUSH, getNotification(context.getString(R.string.UnifiedPushNotificationBuilder__endpoint_changed_airgaped)))
+  }
+
+  fun setNotificationEndpointChangedError() {
+    (context.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager)
+      .notify(NOTIFICATION_ID_UNIFIEDPUSH, getNotification(context.getString(R.string.UnifiedPushNotificationBuilder__endpoint_changed_error)))
+  }
+
+  fun setNotificationRegistrationFailed() {
+    (context.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager)
+      .notify(NOTIFICATION_ID_UNIFIEDPUSH, getNotification(context.getString(R.string.UnifiedPushNotificationBuilder__registration_failed)))
+  }
+}

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

@@ -35,4 +35,9 @@
     <string name="UnifiedPushSettingsFragment__status_summary_unknown_error">Unknown error</string>
     <string name="UnifiedPushSettingsFragment__strategy_summary">The websocket strategy may drain a little more battery but reduces the number of requests sent to the provider.</string>
     <string name="UnifiedPushSettingsFragment__air_gaped_summary">Enable if your MollySocket server can\'t be reach on the Internet. You will have to register the connection manually</string>
+    <string name="UnifiedPushNotificationBuilder__title">UnifiedPush</string>
+    <string name="UnifiedPushNotificationBuilder__mollysocket_registration_changed">Your registration on MollySocket isn\'t valid anymore. Try to remove the linked device and register again.</string>
+    <string name="UnifiedPushNotificationBuilder__endpoint_changed_airgaped">Your UnifiedPush endpoint has changed. You must update your connection on MollySocket.</string>
+    <string name="UnifiedPushNotificationBuilder__endpoint_changed_error">An error occurred while changing your UnifiedPush endpoint. Try to register again to MollySocket.</string>
+    <string name="UnifiedPushNotificationBuilder__registration_failed">Your UnifiedPush distributor refused the registration. You may not have any connection or a requirement is missing for your distributor.</string>
 </resources>