From 9558513190895eb0a189749eb115adab90f37ece Mon Sep 17 00:00:00 2001
From: Cody Henthorne <cody@signal.org>
Date: Tue, 6 Sep 2022 14:48:22 -0400
Subject: [PATCH] Prevent empty call screen after missed calls.

---
 .../securesms/WebRtcCallActivity.java             | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/app/src/main/java/org/thoughtcrime/securesms/WebRtcCallActivity.java b/app/src/main/java/org/thoughtcrime/securesms/WebRtcCallActivity.java
index baafbfdc4e..a8e02a6e0d 100644
--- a/app/src/main/java/org/thoughtcrime/securesms/WebRtcCallActivity.java
+++ b/app/src/main/java/org/thoughtcrime/securesms/WebRtcCallActivity.java
@@ -49,6 +49,7 @@ import com.google.android.material.dialog.MaterialAlertDialogBuilder;
 import org.greenrobot.eventbus.EventBus;
 import org.greenrobot.eventbus.Subscribe;
 import org.greenrobot.eventbus.ThreadMode;
+import org.signal.core.util.ThreadUtil;
 import org.signal.core.util.concurrent.SignalExecutors;
 import org.signal.core.util.logging.Log;
 import org.signal.libsignal.protocol.IdentityKey;
@@ -186,6 +187,20 @@ public class WebRtcCallActivity extends BaseActivity implements SafetyNumberChan
     if (!EventBus.getDefault().isRegistered(this)) {
       EventBus.getDefault().register(this);
     }
+
+    WebRtcViewModel rtcViewModel = EventBus.getDefault().getStickyEvent(WebRtcViewModel.class);
+    if (rtcViewModel == null) {
+      Log.w(TAG, "Activity resumed without service event, perform delay destroy");
+      ThreadUtil.runOnMainDelayed(() -> {
+        WebRtcViewModel delayRtcViewModel = EventBus.getDefault().getStickyEvent(WebRtcViewModel.class);
+        if (delayRtcViewModel == null) {
+          Log.w(TAG, "Activity still without service event, finishing activity");
+          finish();
+        } else {
+          Log.i(TAG, "Event found after delay");
+        }
+      }, TimeUnit.SECONDS.toMillis(1));
+    }
   }
 
   @Override