Display dialog informing the user about the removal of the Top 50 kiosk

Author: TobiGr

app/src/main/java/org/schabi/newpipe/MainActivity.java

@@ -80,6 +80,7 @@
 import org.schabi.newpipe.player.event.OnKeyDownListener;
 import org.schabi.newpipe.player.helper.PlayerHolder;
 import org.schabi.newpipe.player.playqueue.PlayQueue;
+import org.schabi.newpipe.settings.SettingMigrations;
 import org.schabi.newpipe.settings.UpdateSettingsFragment;
 import org.schabi.newpipe.util.Constants;
 import org.schabi.newpipe.util.DeviceUtils;
@@ -197,6 +198,7 @@ protected void onCreate(final Bundle savedInstanceState) {
         }
 
         Localization.migrateAppLanguageSettingIfNecessary(getApplicationContext());
+        SettingMigrations.showUserInfoIfPresent(this);
     }
 
     @Override

app/src/main/java/org/schabi/newpipe/settings/SettingMigrations.java

@@ -5,18 +5,20 @@
 import android.util.Log;
 
 import androidx.annotation.NonNull;
+import androidx.appcompat.app.AlertDialog;
+import androidx.core.util.Consumer;
 import androidx.preference.PreferenceManager;
 
 import org.schabi.newpipe.App;
 import org.schabi.newpipe.R;
 import org.schabi.newpipe.error.ErrorInfo;
 import org.schabi.newpipe.error.ErrorUtil;
 import org.schabi.newpipe.error.UserAction;
-import org.schabi.newpipe.extractor.ServiceList;
 import org.schabi.newpipe.settings.tabs.Tab;
 import org.schabi.newpipe.settings.tabs.TabsManager;
 import org.schabi.newpipe.util.DeviceUtils;
 
+import java.util.ArrayList;
 import java.util.Collections;
 import java.util.HashSet;
 import java.util.List;
@@ -38,6 +40,12 @@ public final class SettingMigrations {
     private static final String TAG = SettingMigrations.class.toString();
     private static SharedPreferences sp;
 
+    /**
+     * List of UI actions that are performed after the UI is initialized
+     * to inform the user about changes that were applied by migrations.
+     */
+    private static final List<Consumer<Context>> MIGRATION_INFO = new ArrayList<>();
+
     private static final Migration MIGRATION_0_1 = new Migration(0, 1) {
         @Override
         public void migrate(@NonNull final Context context) {
@@ -163,6 +171,14 @@ protected void migrate(@NonNull final Context context) {
                     .collect(Collectors.toUnmodifiableList());
             if (tabs.size() != cleanedTabs.size()) {
                 tabsManager.saveTabs(cleanedTabs);
+                // create an AlertDialog to inform the user about the change
+                MIGRATION_INFO.add((Context uiContext) -> new AlertDialog.Builder(uiContext)
+                        .setTitle(R.string.migration_info_6_7_title)
+                        .setMessage(R.string.migration_info_6_7_message)
+                        .setPositiveButton(R.string.ok, null)
+                        .setCancelable(false)
+                        .create()
+                        .show());
             }
         }
     };
@@ -233,6 +249,21 @@ public static void runMigrationsIfNeeded(@NonNull final Context context) {
         sp.edit().putInt(lastPrefVersionKey, currentVersion).apply();
     }
 
+    /**
+     * Perform UI actions informing about migrations that took place if they are present.
+     * @param context Context that can be used to show dialogs/snackbars/toasts
+     */
+    public static void showUserInfoIfPresent(@NonNull final Context context) {
+        for (final Consumer<Context> consumer : MIGRATION_INFO) {
+            try {
+                consumer.accept(context);
+            } catch (final Exception e) {
+                ErrorUtil.showUiErrorSnackbar(context, "Showing migration info to the user", e);
+            }
+        }
+        MIGRATION_INFO.clear();
+    }
+
     private SettingMigrations() { }
 
     abstract static class Migration {

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

@@ -865,4 +865,6 @@
     <string name="show_more">Show more</string>
     <string name="show_less">Show less</string>
     <string name="import_settings_vulnerable_format">The settings in the export being imported use a vulnerable format that was deprecated since NewPipe 0.27.0. Make sure the export being imported is from a trusted source, and prefer using only exports obtained from NewPipe 0.27.0 or newer in the future. Support for importing settings in this vulnerable format will soon be removed completely, and then old versions of NewPipe will not be able to import settings of exports from new versions anymore.</string>
+    <string name="migration_info_6_7_title">SoundCloud Top 50 page removed</string>
+    <string name="migration_info_6_7_message">SoundCloud has discontinued the original Top 50 charts. The corresponding tab has been removed from your main page.</string>
 </resources>