Make sure WebRTC preferences are synced *every* call

This slows the UI, but only for people who have locally opted into
WebRTC calls, and the alternative is that users are likely to have stale
settings the first time a pair of people opt-in.

// FREEBIE

Podfile.lock

@@ -141,7 +141,7 @@ CHECKOUT OPTIONS:
     :commit: 919d541d6b8a8802a94f943026b8f68394e2c0b8
     :git: https://github.com/WhisperSystems/SignalProtocolKit.git
   SignalServiceKit:
-    :commit: 9fdbbb7f8b16ebfad074543281737626a0778be5
+    :commit: 6521a80c44d3db20a0bd5acc6af2e30a9dbcbd6b
     :git: https://github.com/WhisperSystems/SignalServiceKit.git
   SocketRocket:
     :commit: 41b57bb2fc292a814f758441a05243eb38457027

Signal/src/call/CallService.swift

@@ -424,7 +424,7 @@ protocol CallServiceObserver: class {
         Logger.debug("\(TAG) called \(#function)")
 
         guard self.thread != nil else {
-            handleFailedCall(error: .assertionError(description: "ignoring remote ice update for thread: \(thread.uniqueId) since there is no current thread. TODO: Signaling messages out of order?"))
+            handleFailedCall(error: .assertionError(description: "ignoring remote ice update for thread: \(thread.uniqueId) since there is no current thread. Call already ended?"))
             return
         }
 
@@ -960,7 +960,9 @@ protocol CallServiceObserver: class {
             call.state = .localFailure
             callUIAdapter.failCall(call, error: error)
         } else {
-            assertionFailure("\(TAG) in \(#function) but there was no call to fail.")
+            // This can happen when we receive an out of band signaling message (e.g. IceUpdate)
+            // after the call has ended
+            Logger.debug("\(TAG) in \(#function) but there was no call to fail.")
         }
 
         terminateCall()

Signal/src/view controllers/AdvancedSettingsTableViewController.m

@@ -155,6 +155,7 @@ NS_ASSUME_NONNULL_BEGIN
 
     __weak AdvancedSettingsTableViewController *weakSelf = self;
     BOOL isWebRTCEnabled = sender.isOn;
+    DDLogInfo(@"%@ User set WebRTC calling to: %@", self.tag, (isWebRTCEnabled ? @"ON" : @"OFF"));
     TSUpdateAttributesRequest *request = [[TSUpdateAttributesRequest alloc] initWithUpdatedAttributes:isWebRTCEnabled];
     [[TSNetworkManager sharedManager] makeRequest:request
                                           success:^(NSURLSessionDataTask *task, id responseObject) {

Signal/src/view controllers/MessagesViewController.m

@@ -51,6 +51,7 @@
 #import <JSQMessagesViewController/UIColor+JSQMessages.h>
 #import <JSQSystemSoundPlayer.h>
 #import <MobileCoreServices/UTCoreTypes.h>
+#import <SignalServiceKit/ContactsUpdater.h>
 #import <SignalServiceKit/MimeTypeUtil.h>
 #import <SignalServiceKit/OWSAttachmentsProcessor.h>
 #import <SignalServiceKit/OWSDisappearingMessagesConfiguration.h>
@@ -626,32 +627,62 @@ typedef enum : NSUInteger {
 
 #pragma mark - Calls
 
-- (PhoneNumber *)phoneNumberForThread {
-    NSString *contactId = [(TSContactThread *)self.thread contactIdentifier];
-    return [PhoneNumber tryParsePhoneNumberFromUserSpecifiedText:contactId];
-}
-
 - (void)callAction {
     OWSAssert([self.thread isKindOfClass:[TSContactThread class]]);
 
-    if ([self canCall]) {
-        PhoneNumber *number = [self phoneNumberForThread];
-        Contact *contact = [self.contactsManager latestContactForPhoneNumber:number];
-        SignalRecipient *recipient = [SignalRecipient recipientWithTextSecureIdentifier:self.thread.contactIdentifier];
-
-        BOOL localWantsWebRTC = [Environment preferences].isWebRTCEnabled;
-        BOOL remoteWantsWebRTC = recipient.supportsWebRTC;
-        DDLogDebug(@"%@ localWantsWebRTC?: %@, remoteWantsWebRTC?: %@", self.tag, (localWantsWebRTC ? @"YES": @"NO"), (remoteWantsWebRTC ? @"YES" : @"NO"));
-        if (localWantsWebRTC && remoteWantsWebRTC) {
-            // Place WebRTC Call
-            [self performSegueWithIdentifier:OWSMessagesViewControllerSegueInitiateCall sender:self];
-        } else {
-            // Place Redphone call if either local or remote party has not opted in to WebRTC calling.
-            [Environment.phoneManager initiateOutgoingCallToContact:contact atRemoteNumber:number];
-        }
-    } else {
+    if (![self canCall]) {
         DDLogWarn(@"Tried to initiate a call but thread is not callable.");
+        return;
     }
+
+    // Since users can toggle this setting, which is only communicated during contact sync, it's easy to imagine the
+    // preference getting stale. Especially as users are toggling the feature to test calls. So here, we opt for a
+    // blocking network request *every* time we place a call to make sure we've got up to date preferences.
+    //
+    // e.g. The following would suffice if we weren't worried about stale preferences.
+    // SignalRecipient *recipient = [SignalRecipient recipientWithTextSecureIdentifier:self.thread.contactIdentifier];
+    BOOL localWantsWebRTC = [Environment preferences].isWebRTCEnabled;
+
+    if (!localWantsWebRTC) {
+        [self placeRedphoneCall];
+        return;
+    }
+
+    [self.contactsUpdater lookupIdentifier:self.thread.contactIdentifier
+        success:^(SignalRecipient *_Nonnull recipient) {
+            BOOL remoteWantsWebRTC = recipient.supportsWebRTC;
+            DDLogDebug(@"%@ localWantsWebRTC?: %@, remoteWantsWebRTC?: %@",
+                self.tag,
+                (localWantsWebRTC ? @"YES" : @"NO"),
+                (remoteWantsWebRTC ? @"YES" : @"NO"));
+            if (localWantsWebRTC && remoteWantsWebRTC) {
+                [self placeWebRTCCall];
+            } else {
+                [self placeRedphoneCall];
+            }
+        }
+        failure:^(NSError *_Nonnull error) {
+            DDLogWarn(@"%@ looking up call recipient: %@ failed with error: %@", self.tag, self.thread, error);
+            SignalAlertView(NSLocalizedString(@"UNABLE_TO_PLACE_CALL", @"Alert Title"), error.localizedDescription);
+        }];
+}
+
+- (void)placeRedphoneCall
+{
+    DDLogInfo(@"%@ Placing redphone call to: %@", self.tag, self.thread);
+    PhoneNumber *number = [PhoneNumber tryParsePhoneNumberFromUserSpecifiedText:self.thread.contactIdentifier];
+    Contact *contact = [self.contactsManager latestContactForPhoneNumber:number];
+
+    OWSAssert(number != nil);
+    OWSAssert(contact != nil);
+
+    [Environment.phoneManager initiateOutgoingCallToContact:contact atRemoteNumber:number];
+}
+
+- (void)placeWebRTCCall
+{
+    DDLogInfo(@"%@ Placing WebRTC call to: %@", self.tag, self.thread);
+    [self performSegueWithIdentifier:OWSMessagesViewControllerSegueInitiateCall sender:self];
 }
 
 - (BOOL)canCall {

Signal/translations/en.lproj/Localizable.strings

@@ -543,9 +543,6 @@
 /* No comment provided by engineer. */
 "OUTGOING_CALL" = "Outgoing call";
 
-/* No comment provided by engineer. */
-"PHONE_NEEDS_UNLOCK" = "Your iPhone needs to be unlocked to receive new messages.";
-
 /* Alert body when verifying with {{contact name}} */
 "PRIVACY_VERIFICATION_FAILED_I_HAVE_WRONG_KEY_FOR_THEM" = "This doesn't look like your safety number with %@. Are you verifying the correct contact?";
 
@@ -843,6 +840,9 @@
 /* No comment provided by engineer. */
 "TXT_DELETE_TITLE" = "Delete";
 
+/* Alert Title */
+"UNABLE_TO_PLACE_CALL" = "Unable to place call.";
+
 /* Pressing this button moves an archived thread from the archive back to the inbox */
 "UNARCHIVE_ACTION" = "Unarchive";