Prevent showing notification megaphone if not translated.

app/src/main/java/org/thoughtcrime/securesms/megaphone/Megaphones.java

@@ -10,6 +10,7 @@
 
 import com.annimon.stream.Stream;
 
+import org.signal.core.util.TranslationDetection;
 import org.signal.core.util.logging.Log;
 import org.thoughtcrime.securesms.ApplicationPreferencesActivity;
 import org.thoughtcrime.securesms.R;
@@ -31,9 +32,11 @@
 import org.thoughtcrime.securesms.util.PopulationFeatureFlags;
 import org.thoughtcrime.securesms.util.TextSecurePreferences;
 import org.thoughtcrime.securesms.util.VersionTracker;
+import org.thoughtcrime.securesms.util.dynamiclanguage.DynamicLanguageContextWrapper;
 
 import java.util.LinkedHashMap;
 import java.util.List;
+import java.util.Locale;
 import java.util.Map;
 import java.util.Objects;
 import java.util.concurrent.TimeUnit;
@@ -325,9 +328,21 @@ private static boolean shouldShowOnboardingMegaphone(@NonNull Context context) {
   }
 
   private static boolean shouldShowNotificationsMegaphone(@NonNull Context context) {
-    return !TextSecurePreferences.isNotificationsEnabled(context) ||
-           !NotificationChannels.isMessageChannelEnabled(context) ||
-           !NotificationChannels.areNotificationsEnabled(context);
+    boolean shouldShow = !TextSecurePreferences.isNotificationsEnabled(context) ||
+                         !NotificationChannels.isMessageChannelEnabled(context) ||
+                         !NotificationChannels.areNotificationsEnabled(context);
+    if (shouldShow) {
+      Locale locale = DynamicLanguageContextWrapper.getUsersSelectedLocale(context);
+      if (!new TranslationDetection(context, locale)
+               .textExistsInUsersLanguage(R.string.NotificationsMegaphone_turn_on_notifications,
+                                          R.string.NotificationsMegaphone_never_miss_a_message,
+                                          R.string.NotificationsMegaphone_turn_on,
+                                          R.string.NotificationsMegaphone_not_now)) {
+        Log.i(TAG, "Would show NotificationsMegaphone but is not yet translated in " + locale);
+        return false;
+      }
+    }
+    return shouldShow;
   }
 
   public enum Event {

app/src/main/java/org/thoughtcrime/securesms/util/SupportEmailUtil.java

@@ -8,7 +8,7 @@
 import androidx.annotation.Nullable;
 import androidx.annotation.StringRes;
 
-import org.signal.core.util.EnglishResourceUtil;
+import org.signal.core.util.ResourceUtil;
 import org.thoughtcrime.securesms.BuildConfig;
 import org.thoughtcrime.securesms.R;
 import org.thoughtcrime.securesms.keyvalue.SignalStore;
@@ -37,7 +37,7 @@ private SupportEmailUtil() { }
   }
 
   private static @NonNull String buildSystemInfo(@NonNull Context context, @StringRes int subject) {
-    Resources englishResources = EnglishResourceUtil.getEnglishResources(context);
+    Resources englishResources = ResourceUtil.getEnglishResources(context);
 
     return "--- " + context.getString(R.string.HelpFragment__support_info) + " ---" +
            "\n" +

app/src/main/java/org/thoughtcrime/securesms/util/dynamiclanguage/DynamicLanguageContextWrapper.java

@@ -3,6 +3,8 @@
 import android.content.Context;
 import android.content.res.Configuration;
 
+import androidx.annotation.NonNull;
+
 import org.thoughtcrime.securesms.util.TextSecurePreferences;
 
 import java.util.Locale;
@@ -13,15 +15,19 @@
 public final class DynamicLanguageContextWrapper {
   private DynamicLanguageContextWrapper() {}
 
-  public static void prepareOverrideConfiguration(Context context, Configuration base) {
-    String language  = TextSecurePreferences.getLanguage(context);
-    Locale newLocale = LocaleParser.findBestMatchingLocaleForLanguage(language);
+  public static void prepareOverrideConfiguration(@NonNull Context context, @NonNull Configuration base) {
+    Locale newLocale = getUsersSelectedLocale(context);
 
     Locale.setDefault(newLocale);
     base.setLocale(newLocale);
   }
 
-  public static void updateContext(Context base) {
+  public static @NonNull Locale getUsersSelectedLocale(@NonNull Context context) {
+    String language  = TextSecurePreferences.getLanguage(context);
+    return LocaleParser.findBestMatchingLocaleForLanguage(language);
+  }
+
+  public static void updateContext(@NonNull Context base) {
     Configuration config = base.getResources().getConfiguration();
 
     prepareOverrideConfiguration(base, config);

app/src/main/java/org/thoughtcrime/securesms/util/dynamiclanguage/LocaleParser.java

@@ -3,6 +3,7 @@
 import android.content.res.Configuration;
 import android.content.res.Resources;
 
+import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.core.os.ConfigurationCompat;
 
@@ -20,7 +21,7 @@ private LocaleParser() {
    * Given a language, gets the best choice from the apps list of supported languages and the
    * Systems set of languages.
    */
-  static Locale findBestMatchingLocaleForLanguage(@Nullable String language) {
+  static @NonNull Locale findBestMatchingLocaleForLanguage(@Nullable String language) {
     final Locale locale = LanguageString.parseLocale(language);
     if (appSupportsTheExactLocale(locale)) {
       return locale;
@@ -39,7 +40,7 @@ private static boolean appSupportsTheExactLocale(@Nullable Locale locale) {
   /**
    * Get the first preferred language the app supports.
    */
-  private static Locale findBestSystemLocale() {
+  private static @NonNull Locale findBestSystemLocale() {
     final Configuration config = Resources.getSystem().getConfiguration();
 
     final Locale firstMatch = ConfigurationCompat.getLocales(config)

core-util/src/main/java/org/signal/core/util/EnglishResourceUtil.java → core-util/src/main/java/org/signal/core/util/ResourceUtil.java

@@ -12,16 +12,20 @@
 /**
  * Gives access to English strings.
  */
-public final class EnglishResourceUtil {
+public final class ResourceUtil {
 
-  private EnglishResourceUtil() {
+  private ResourceUtil() {
   }
 
   public static Resources getEnglishResources(@NonNull Context context) {
+    return getResources(context, Locale.ENGLISH);
+  }
+
+  public static Resources getResources(@NonNull Context context, @NonNull Locale locale) {
     Configuration configurationLocal = context.getResources().getConfiguration();
 
     Configuration configurationEn = new Configuration(configurationLocal);
-    configurationEn.setLocale(Locale.ENGLISH);
+    configurationEn.setLocale(locale);
 
     return context.createConfigurationContext(configurationEn)
                   .getResources();

core-util/src/main/java/org/signal/core/util/TranslationDetection.java

@@ -24,7 +24,17 @@ public final class TranslationDetection {
   public TranslationDetection(@NonNull Context context) {
     this.resourcesLocal     = context.getResources();
     this.configurationLocal = resourcesLocal.getConfiguration();
-    this.resourcesEn        = EnglishResourceUtil.getEnglishResources(context);
+    this.resourcesEn        = ResourceUtil.getEnglishResources(context);
+  }
+
+  /**
+   * @param context     Can be Application context.
+   * @param usersLocale Locale of user.
+   */
+  public TranslationDetection(@NonNull Context context, @NonNull Locale usersLocale) {
+    this.resourcesLocal     = ResourceUtil.getResources(context.getApplicationContext(), usersLocale);
+    this.configurationLocal = resourcesLocal.getConfiguration();
+    this.resourcesEn        = ResourceUtil.getEnglishResources(context);
   }
 
   /**
@@ -44,6 +54,15 @@ public boolean textExistsInUsersLanguage(@StringRes int resId) {
     return !stringEn.equals(stringLocal);
   }
 
+  public boolean textExistsInUsersLanguage(@StringRes int... resIds) {
+    for (int resId : resIds) {
+      if (!textExistsInUsersLanguage(resId)) {
+        return false;
+      }
+    }
+    return true;
+  }
+
   protected boolean configSupportsEnglish() {
     if (configurationLocal.locale.getLanguage().equals("en")) {
       return true;