Add denial dialogs for call links.

app/src/main/java/org/thoughtcrime/securesms/WebRtcCallActivity.java

@@ -81,6 +81,7 @@ import org.thoughtcrime.securesms.recipients.LiveRecipient;
 import org.thoughtcrime.securesms.recipients.Recipient;
 import org.thoughtcrime.securesms.recipients.RecipientId;
 import org.thoughtcrime.securesms.safety.SafetyNumberBottomSheet;
+import org.thoughtcrime.securesms.service.webrtc.CallLinkDisconnectReason;
 import org.thoughtcrime.securesms.service.webrtc.SignalCallManager;
 import org.thoughtcrime.securesms.sms.MessageSender;
 import org.thoughtcrime.securesms.util.BottomSheetUtil;
@@ -145,6 +146,7 @@ public class WebRtcCallActivity extends BaseActivity implements SafetyNumberChan
   private ThrottledDebouncer               requestNewSizesThrottle;
   private PictureInPictureParams.Builder   pipBuilderParams;
   private LifecycleDisposable              lifecycleDisposable;
+  private long                             lastCallLinkDisconnectDialogShowTime;
 
   private Disposable ephemeralStateDisposable = Disposable.empty();
 
@@ -842,6 +844,18 @@ public class WebRtcCallActivity extends BaseActivity implements SafetyNumberChan
         handleUntrustedIdentity(event); break;
     }
 
+    if (event.getCallLinkDisconnectReason() != null && event.getCallLinkDisconnectReason().getPostedAt() > lastCallLinkDisconnectDialogShowTime) {
+      lastCallLinkDisconnectDialogShowTime = System.currentTimeMillis();
+
+      if (event.getCallLinkDisconnectReason() instanceof CallLinkDisconnectReason.RemovedFromCall) {
+        displayRemovedFromCallLinkDialog();
+      } else if (event.getCallLinkDisconnectReason() instanceof CallLinkDisconnectReason.DeniedRequestToJoinCall) {
+        displayDeniedRequestToJoinCallLinkDialog();
+      } else {
+        throw new AssertionError("Unexpected reason: " + event.getCallLinkDisconnectReason());
+      }
+    }
+
     boolean enableVideo = event.getLocalParticipant().getCameraState().getCameraCount() > 0 && enableVideoIfAvailable;
 
     viewModel.updateFromWebRtcViewModel(event, enableVideo);
@@ -863,6 +877,22 @@ public class WebRtcCallActivity extends BaseActivity implements SafetyNumberChan
     }
   }
 
+  private void displayRemovedFromCallLinkDialog() {
+    new MaterialAlertDialogBuilder(this)
+        .setTitle(R.string.WebRtcCallActivity__removed_from_call)
+        .setMessage(R.string.WebRtcCallActivity__someone_has_removed_you_from_the_call)
+        .setPositiveButton(android.R.string.ok, null)
+        .show();
+  }
+
+  private void displayDeniedRequestToJoinCallLinkDialog() {
+    new MaterialAlertDialogBuilder(this)
+        .setTitle(R.string.WebRtcCallActivity__join_request_denied)
+        .setMessage(R.string.WebRtcCallActivity__your_request_to_join_this_call_has_been_denied)
+        .setPositiveButton(android.R.string.ok, null)
+        .show();
+  }
+
   private void handleCallPreJoin(@NonNull WebRtcViewModel event) {
     if (event.getGroupState().isNotIdle()) {
       callScreen.setStatusFromGroupCallState(event.getGroupState());

app/src/main/java/org/thoughtcrime/securesms/events/WebRtcViewModel.kt

@@ -5,6 +5,7 @@ import org.thoughtcrime.securesms.components.webrtc.BroadcastVideoSink
 import org.thoughtcrime.securesms.events.CallParticipant.Companion.createLocal
 import org.thoughtcrime.securesms.recipients.Recipient
 import org.thoughtcrime.securesms.recipients.RecipientId
+import org.thoughtcrime.securesms.service.webrtc.CallLinkDisconnectReason
 import org.thoughtcrime.securesms.service.webrtc.PendingParticipantCollection
 import org.thoughtcrime.securesms.service.webrtc.state.WebRtcServiceState
 import org.thoughtcrime.securesms.webrtc.audio.SignalAudioManager
@@ -96,6 +97,7 @@ class WebRtcViewModel(state: WebRtcServiceState) {
   val participantLimit: Long? = state.callInfoState.participantLimit
   val pendingParticipants: PendingParticipantCollection = state.callInfoState.pendingParticipants
   val isCallLink: Boolean = state.callInfoState.callRecipient.isCallLink
+  val callLinkDisconnectReason: CallLinkDisconnectReason? = state.callInfoState.callLinkDisconnectReason
 
   @get:JvmName("shouldRingGroup")
   val ringGroup: Boolean = state.getCallSetupState(state.callInfoState.activePeer?.callId).ringGroup

app/src/main/java/org/thoughtcrime/securesms/service/webrtc/CallLinkDisconnectReason.kt

@@ -0,0 +1,18 @@
+/*
+ * Copyright 2023 Signal Messenger, LLC
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+package org.thoughtcrime.securesms.service.webrtc
+
+/**
+ * Describes why a user was not able to join a call link.
+ *
+ * Note: postedAt is kept as a long to ensure Java compatibility.
+ */
+sealed interface CallLinkDisconnectReason {
+  val postedAt: Long
+
+  data class RemovedFromCall(override val postedAt: Long = System.currentTimeMillis()) : CallLinkDisconnectReason
+  data class DeniedRequestToJoinCall(override val postedAt: Long = System.currentTimeMillis()) : CallLinkDisconnectReason
+}

app/src/main/java/org/thoughtcrime/securesms/service/webrtc/CallLinkJoiningActionProcessor.kt

@@ -6,6 +6,7 @@
 package org.thoughtcrime.securesms.service.webrtc
 
 import org.signal.core.util.logging.Log
+import org.signal.ringrtc.GroupCall
 import org.thoughtcrime.securesms.service.webrtc.state.WebRtcServiceState
 
 /**
@@ -25,4 +26,19 @@ class CallLinkJoiningActionProcessor(
 
     return currentState
   }
+
+  override fun handleGroupCallEnded(currentState: WebRtcServiceState, groupCallHash: Int, groupCallEndReason: GroupCall.GroupCallEndReason): WebRtcServiceState {
+    val serviceState = super.handleGroupCallEnded(currentState, groupCallHash, groupCallEndReason)
+
+    val callLinkDisconnectReason = when (groupCallEndReason) {
+      GroupCall.GroupCallEndReason.DENIED_REQUEST_TO_JOIN_CALL -> CallLinkDisconnectReason.DeniedRequestToJoinCall()
+      GroupCall.GroupCallEndReason.REMOVED_FROM_CALL -> CallLinkDisconnectReason.RemovedFromCall()
+      else -> null
+    }
+
+    return serviceState.builder()
+      .changeCallInfoState()
+      .setCallLinkDisconnectReason(callLinkDisconnectReason)
+      .build()
+  }
 }

app/src/main/java/org/thoughtcrime/securesms/service/webrtc/state/CallInfoState.kt

@@ -9,6 +9,7 @@ import org.thoughtcrime.securesms.events.WebRtcViewModel
 import org.thoughtcrime.securesms.recipients.Recipient
 import org.thoughtcrime.securesms.recipients.RecipientId
 import org.thoughtcrime.securesms.ringrtc.RemotePeer
+import org.thoughtcrime.securesms.service.webrtc.CallLinkDisconnectReason
 import org.thoughtcrime.securesms.service.webrtc.PendingParticipantCollection
 
 /**
@@ -28,7 +29,8 @@ data class CallInfoState(
   var identityChangedRecipients: MutableSet<RecipientId> = mutableSetOf(),
   var remoteDevicesCount: OptionalLong = OptionalLong.empty(),
   var participantLimit: Long? = null,
-  var pendingParticipants: PendingParticipantCollection = PendingParticipantCollection()
+  var pendingParticipants: PendingParticipantCollection = PendingParticipantCollection(),
+  var callLinkDisconnectReason: CallLinkDisconnectReason? = null
 ) {
 
   val remoteCallParticipants: List<CallParticipant>

app/src/main/java/org/thoughtcrime/securesms/service/webrtc/state/WebRtcServiceStateBuilder.java

@@ -18,6 +18,7 @@ import org.thoughtcrime.securesms.recipients.RecipientId;
 import org.thoughtcrime.securesms.ringrtc.Camera;
 import org.thoughtcrime.securesms.ringrtc.CameraState;
 import org.thoughtcrime.securesms.ringrtc.RemotePeer;
+import org.thoughtcrime.securesms.service.webrtc.CallLinkDisconnectReason;
 import org.thoughtcrime.securesms.service.webrtc.WebRtcActionProcessor;
 import org.thoughtcrime.securesms.webrtc.audio.SignalAudioManager;
 import org.webrtc.PeerConnection;
@@ -358,5 +359,10 @@ public class WebRtcServiceStateBuilder {
       toBuild.setPendingParticipants(toBuild.getPendingParticipants().withDenial(participant));
       return this;
     }
+
+    public @NonNull CallInfoStateBuilder setCallLinkDisconnectReason(@Nullable CallLinkDisconnectReason callLinkDisconnectReason) {
+      toBuild.setCallLinkDisconnectReason(callLinkDisconnectReason);
+      return this;
+    }
   }
 }

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

@@ -1761,7 +1761,15 @@
         <item quantity="one">%1$d person waiting</item>
         <item quantity="other">%1$d people waiting</item>
     </plurals>
-    
+    <!-- Title of dialog displayed when a user's join request is denied for call link entry -->
+    <string name="WebRtcCallActivity__join_request_denied">Join request denied</string>
+    <!-- Message of dialog displayed when a user's join request is denied for call link entry -->
+    <string name="WebRtcCallActivity__your_request_to_join_this_call_has_been_denied">Your request to join this call has been denied.</string>
+    <!-- Title of dialog displayed when a user is removed from a call link -->
+    <string name="WebRtcCallActivity__removed_from_call">Removed from call</string>
+    <!-- Message of dialog displayed when a user is removed from a call link -->
+    <string name="WebRtcCallActivity__someone_has_removed_you_from_the_call">Someone has removed you from the call.</string>
+
 
     <!-- WebRtcCallView -->
     <string name="WebRtcCallView__signal_call">Signal Call</string>