Ensure that notification heuristics are calculated in the background.

Author: greyson-signal

app/src/main/java/org/thoughtcrime/securesms/components/settings/app/notifications/NotificationsSettingsViewModel.kt

@@ -5,9 +5,12 @@ import android.net.Uri
 import android.os.Build
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.ViewModelProvider
+import androidx.lifecycle.viewModelScope
+import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.update
+import kotlinx.coroutines.launch
 import org.thoughtcrime.securesms.dependencies.AppDependencies
 import org.thoughtcrime.securesms.keyvalue.SignalStore
 import org.thoughtcrime.securesms.notifications.DeviceSpecificNotificationConfig
@@ -28,7 +31,11 @@ class NotificationsSettingsViewModel(private val sharedPreferences: SharedPrefer
       SignalStore.settings.isMessageVibrateEnabled = NotificationChannels.getInstance().messageVibrate
     }
 
-    store.update { getState(calculateSlowNotifications = true) }
+    // Calculating slow notification stuff isn't thread-safe, so we do it without to start off so we have most state populated, then fetch it in the background.
+    store.update { getState(calculateSlowNotifications = false) }
+    viewModelScope.launch(Dispatchers.IO) {
+      store.update { getState(calculateSlowNotifications = true) }
+    }
   }
 
   fun refresh() {