Feature flag automatic session reset.

app/src/main/java/org/thoughtcrime/securesms/jobs/AutomaticSessionResetJob.java

@@ -15,6 +15,7 @@ import org.thoughtcrime.securesms.recipients.Recipient;
 import org.thoughtcrime.securesms.recipients.RecipientId;
 import org.thoughtcrime.securesms.recipients.RecipientUtil;
 import org.thoughtcrime.securesms.transport.RetryLaterException;
+import org.thoughtcrime.securesms.util.FeatureFlags;
 import org.whispersystems.libsignal.util.guava.Optional;
 import org.whispersystems.signalservice.api.SignalServiceMessageSender;
 import org.whispersystems.signalservice.api.crypto.UnidentifiedAccessPair;
@@ -82,9 +83,13 @@ public class AutomaticSessionResetJob extends BaseJob {
 
   @Override
   protected void onRun() throws Exception {
-    SessionUtil.archiveSession(context, recipientId, deviceId);
-    insertLocalMessage();
-    sendNullMessage();
+    if (FeatureFlags.automaticSessionReset()) {
+      SessionUtil.archiveSession(context, recipientId, deviceId);
+      insertLocalMessage();
+      sendNullMessage();
+    } else {
+      insertLocalMessage();
+    }
   }
 
   @Override

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

@@ -67,6 +67,7 @@ public final class FeatureFlags {
   private static final String SEND_VIEWED_RECEIPTS         = "android.sendViewedReceipts";
   private static final String CUSTOM_VIDEO_MUXER           = "android.customVideoMuxer";
   private static final String CDS_REFRESH_INTERVAL         = "cds.syncInterval.seconds";
+  private static final String AUTOMATIC_SESSION_RESET      = "android.automaticSessionReset";
 
   /**
    * We will only store remote values for flags in this set. If you want a flag to be controllable
@@ -90,7 +91,8 @@ public final class FeatureFlags {
       SEND_VIEWED_RECEIPTS,
       CUSTOM_VIDEO_MUXER,
       CDS_REFRESH_INTERVAL,
-      GROUP_NAME_MAX_LENGTH
+      GROUP_NAME_MAX_LENGTH,
+      AUTOMATIC_SESSION_RESET
   );
 
   @VisibleForTesting
@@ -124,7 +126,8 @@ public final class FeatureFlags {
       GV1_MIGRATION_JOB,
       CUSTOM_VIDEO_MUXER,
       CDS_REFRESH_INTERVAL,
-      GROUP_NAME_MAX_LENGTH
+      GROUP_NAME_MAX_LENGTH,
+      AUTOMATIC_SESSION_RESET
   );
 
   /**
@@ -285,6 +288,11 @@ public final class FeatureFlags {
     return Math.max(32, getInteger(GROUP_NAME_MAX_LENGTH, -1));
   }
 
+  /** Whether or not to allow automatic session resets. */
+  public static boolean automaticSessionReset() {
+    return getBoolean(AUTOMATIC_SESSION_RESET, true);
+  }
+
   /** Only for rendering debug info. */
   public static synchronized @NonNull Map<String, Object> getMemoryValues() {
     return new TreeMap<>(REMOTE_VALUES);