Add Helper for some UnifiedPush functions

mastodon/src/main/java/org/joinmastodon/android/api/session/AccountSessionManager.java

@@ -34,6 +34,7 @@ import org.joinmastodon.android.model.EmojiCategory;
 import org.joinmastodon.android.model.LegacyFilter;
 import org.joinmastodon.android.model.Instance;
 import org.joinmastodon.android.model.Token;
+import org.joinmastodon.android.utils.UnifiedPushHelper;
 import org.unifiedpush.android.connector.UnifiedPush;
 
 import java.io.File;
@@ -127,7 +128,7 @@ public class AccountSessionManager{
 		MastodonAPIController.runInBackground(()->writeInstanceInfoFile(wrapper, instance.uri));
 
 		updateMoreInstanceInfo(instance, instance.uri);
-		if (UnifiedPush.getAckDistributor(context) != null) {
+		if (UnifiedPushHelper.isUnifiedPushEnabled(context)) {
 			UnifiedPush.register(
 					context,
 					session.getID(),

mastodon/src/main/java/org/joinmastodon/android/fragments/settings/SettingsNotificationsFragment.java

@@ -26,6 +26,7 @@ import org.joinmastodon.android.model.viewmodel.ListItem;
 import org.joinmastodon.android.ui.M3AlertDialogBuilder;
 import org.joinmastodon.android.ui.utils.HideableSingleViewRecyclerAdapter;
 import org.joinmastodon.android.ui.utils.UiUtils;
+import org.joinmastodon.android.utils.UnifiedPushHelper;
 import org.unifiedpush.android.connector.UnifiedPush;
 
 import java.time.Instant;
@@ -57,6 +58,7 @@ public class SettingsNotificationsFragment extends BaseSettingsFragment<Void>{
 
 	// MEGALODON
 	private boolean useUnifiedPush = false;
+	private boolean hasAnyUnifiedPushDistrib = false;
 	private CheckableListItem<Void> uniformIconItem, deleteItem, onlyLatestItem, unifiedPushItem;
 	private CheckableListItem<Void> postsItem, updateItem;
 
@@ -72,7 +74,8 @@ public class SettingsNotificationsFragment extends BaseSettingsFragment<Void>{
 		lp=AccountSessionManager.get(accountID).getLocalPreferences();
 
 		getPushSubscription();
-		useUnifiedPush=UnifiedPush.getAckDistributor(getContext()) != null;
+		useUnifiedPush=UnifiedPushHelper.isUnifiedPushEnabled(getContext());
+		hasAnyUnifiedPushDistrib=UnifiedPushHelper.hasAnyDistributorInstalled(getContext());
 
 		onDataLoaded(List.of(
 				pauseItem=new CheckableListItem<>(getString(R.string.pause_all_notifications), getPauseItemSubtitle(), CheckableListItem.Style.SWITCH, false, R.drawable.ic_fluent_alert_snooze_24_regular, i->onPauseNotificationsClick(false)),
@@ -94,7 +97,7 @@ public class SettingsNotificationsFragment extends BaseSettingsFragment<Void>{
 		));
 
 		//only enable when distributors, who can receive notifications, are available
-		unifiedPushItem.isEnabled=!UnifiedPush.getDistributors(getContext()).isEmpty();
+		unifiedPushItem.isEnabled=hasAnyUnifiedPushDistrib;
 		if (!unifiedPushItem.isEnabled) {
 			unifiedPushItem.subtitleRes=R.string.sk_settings_unifiedpush_no_distributor_body;
 		}
@@ -316,12 +319,12 @@ public class SettingsNotificationsFragment extends BaseSettingsFragment<Void>{
 			bannerText.setText(R.string.notifications_disabled_in_system);
 			bannerButton.setText(R.string.open_system_notification_settings);
 			bannerButton.setOnClickListener(v->openSystemNotificationSettings());
-		}else if(BuildConfig.BUILD_TYPE.equals("fdroidRelease") && UnifiedPush.getAckDistributor(getContext()) != null){
+		}else if(BuildConfig.BUILD_TYPE.equals("fdroidRelease") && useUnifiedPush){
 			bannerAdapter.setVisible(true);
 			bannerIcon.setImageResource(R.drawable.ic_fluent_warning_24_filled);
 			bannerTitle.setVisibility(View.VISIBLE);
 			bannerTitle.setText(R.string.mo_settings_unifiedpush_warning);
-			if(UnifiedPush.getDistributors(getContext()).isEmpty()) {
+			if(!hasAnyUnifiedPushDistrib) {
 				bannerText.setText(R.string.mo_settings_unifiedpush_warning_no_distributors);
 				bannerButton.setText(R.string.info);
 				bannerButton.setOnClickListener(v->UiUtils.launchWebBrowser(getContext(), "https://unifiedpush.org/"));
@@ -342,23 +345,15 @@ public class SettingsNotificationsFragment extends BaseSettingsFragment<Void>{
 	}
 
 	private void onUnifiedPushClick(){
-		if(UnifiedPush.getAckDistributor(getContext()) == null){
+		if(!useUnifiedPush){
 			List<String> distributors = UnifiedPush.getDistributors(getContext());
 			showUnifiedPushRegisterDialog(distributors);
 			return;
 		}
-
-		for (AccountSession accountSession : AccountSessionManager.getInstance().getLoggedInAccounts()) {
-			UnifiedPush.unregister(
-					getContext(),
-					accountSession.getID()
-			);
-
-			//re-register to fcm
-			accountSession.getPushSubscriptionManager().registerAccountForPush(getPushSubscription());
-		}
+		UnifiedPushHelper.unregisterAllAccounts(getContext());
 		unifiedPushItem.toggle();
 		rebindItem(unifiedPushItem);
+		useUnifiedPush = false;
 	}
 
 	private void showUnifiedPushRegisterDialog(List<String> distributors){
@@ -366,16 +361,10 @@ public class SettingsNotificationsFragment extends BaseSettingsFragment<Void>{
 				(dialog, which)->{
 					String userDistrib = distributors.get(which);
 					UnifiedPush.saveDistributor(getContext(), userDistrib);
-					for (AccountSession accountSession : AccountSessionManager.getInstance().getLoggedInAccounts()){
-						UnifiedPush.register(
-								getContext(),
-								accountSession.getID(),
-								null,
-								null
-						);
-					}
+					UnifiedPushHelper.registerAllAccounts(getContext());
 					unifiedPushItem.toggle();
 					rebindItem(unifiedPushItem);
+					useUnifiedPush = true;
 				}).setOnCancelListener(d->rebindItem(unifiedPushItem)).show();
 	}
 

mastodon/src/main/java/org/joinmastodon/android/utils/UnifiedPushHelper.java

@@ -0,0 +1,51 @@
+package org.joinmastodon.android.utils;
+
+import android.content.Context;
+
+import androidx.annotation.NonNull;
+
+import org.joinmastodon.android.api.session.AccountSession;
+import org.joinmastodon.android.api.session.AccountSessionManager;
+import org.unifiedpush.android.connector.UnifiedPush;
+
+public class UnifiedPushHelper {
+
+	/**
+	 * @param context
+	 * @return `true` if UnifiedPush is used
+	 */
+	public static boolean isUnifiedPushEnabled(@NonNull Context context) {
+		return UnifiedPush.getAckDistributor(context) != null;
+	}
+
+	/**
+	 * If any distributor is installed on the device
+	 * @param context
+	 * @return `true` if at least one is installed
+	 */
+	public static boolean hasAnyDistributorInstalled(@NonNull Context context) {
+		return !UnifiedPush.getDistributors(context).isEmpty();
+	}
+
+	public static void registerAllAccounts(@NonNull Context context) {
+		for (AccountSession accountSession : AccountSessionManager.getInstance().getLoggedInAccounts()){
+			UnifiedPush.register(
+					context,
+					accountSession.getID(),
+					null,
+					null
+			);
+		}
+	}
+
+	public static void unregisterAllAccounts(@NonNull Context context) {
+		for (AccountSession accountSession : AccountSessionManager.getInstance().getLoggedInAccounts()){
+			UnifiedPush.unregister(
+					context,
+					accountSession.getID()
+			);
+			// use FCM again
+			accountSession.getPushSubscriptionManager().registerAccountForPush(null);
+		}
+	}
+}