Show push tokens in about view.

// FREEBIE

Signal/src/Models/SyncPushTokensJob.swift

@@ -8,6 +8,8 @@ import PromiseKit
 class SyncPushTokensJob: NSObject {
     let TAG = "[SyncPushTokensJob]"
 
+    @objc public static let PushTokensDidChange = Notification.Name("PushTokensDidChange")
+
     // MARK: Dependencies
     let accountManager: AccountManager
     let preferences: OWSPreferences
@@ -90,14 +92,24 @@ class SyncPushTokensJob: NSObject {
     private func recordPushTokensLocally(pushToken: String, voipToken: String) -> Promise<Void> {
         Logger.warn("\(TAG) Recording push tokens locally. pushToken: \(pushToken), voipToken: \(voipToken)")
 
+        var didTokensChange = false
+
         if (pushToken != self.preferences.getPushToken()) {
             Logger.info("\(TAG) Recording new plain push token")
             self.preferences.setPushToken(pushToken)
+            didTokensChange = true
         }
 
         if (voipToken != self.preferences.getVoipToken()) {
             Logger.info("\(TAG) Recording new voip token")
             self.preferences.setVoipToken(voipToken)
+            didTokensChange = true
+        }
+
+        if (didTokensChange) {
+            DispatchQueue.main.async {
+                NotificationCenter.default.post(name: SyncPushTokensJob.PushTokensDidChange, object: nil)
+            }
         }
 
         return Promise(value: ())

Signal/src/ViewControllers/AboutTableViewController.m

@@ -3,6 +3,9 @@
 //
 
 #import "AboutTableViewController.h"
+#import "Environment.h"
+#import "OWSPreferences.h"
+#import "Signal-Swift.h"
 #import "UIUtil.h"
 #import "UIView+OWS.h"
 #import <SignalServiceKit/TSDatabaseView.h>
@@ -10,6 +13,10 @@
 
 @implementation AboutTableViewController
 
+- (void)dealloc {
+    [[NSNotificationCenter defaultCenter] removeObserver:self];
+}
+
 - (void)viewDidLoad
 {
     [super viewDidLoad];
@@ -17,6 +24,15 @@
     self.title = NSLocalizedString(@"SETTINGS_ABOUT", @"Navbar title");
 
     [self updateTableContents];
+
+    [[NSNotificationCenter defaultCenter] addObserver:self
+                                             selector:@selector(pushTokensDidChange:)
+                                                 name:[OWSSyncPushTokensJob PushTokensDidChange]
+                                               object:nil];
+}
+
+- (void)pushTokensDidChange:(NSNotification *)notification {
+    [self updateTableContents];
 }
 
 #pragma mark - Table Contents
@@ -64,6 +80,12 @@
     [debugSection addItem:[OWSTableItem labelItemWithText:[NSString stringWithFormat:@"Threads: %zd", threadCount]]];
     [debugSection addItem:[OWSTableItem labelItemWithText:[NSString stringWithFormat:@"Messages: %zd", messageCount]]];
     [contents addSection:debugSection];
+
+    OWSPreferences *preferences = [Environment preferences];
+    NSString *_Nullable pushToken = [preferences getPushToken];
+    NSString *_Nullable voipToken = [preferences getVoipToken];
+    [debugSection addItem:[OWSTableItem labelItemWithText:[NSString stringWithFormat:@"Push Token: %@", pushToken ?: @"None" ]]];
+    [debugSection addItem:[OWSTableItem labelItemWithText:[NSString stringWithFormat:@"VOIP Token: %@", voipToken ?: @"None" ]]];
 #endif
 
     self.contents = contents;