compare safety numbers with clipboard (#1475)

* Compare safety numbers with clipboard

// FREEBIE

Signal.xcodeproj/project.pbxproj

@@ -65,6 +65,8 @@
 		45CD81F21DC03A22004C9430 /* OWSLogger.m in Sources */ = {isa = PBXBuildFile; fileRef = 45CD81F11DC03A22004C9430 /* OWSLogger.m */; };
 		45D231771DC7E8F10034FA89 /* SessionResetJob.swift in Sources */ = {isa = PBXBuildFile; fileRef = 45D231761DC7E8F10034FA89 /* SessionResetJob.swift */; };
 		45D231781DC7E8F10034FA89 /* SessionResetJob.swift in Sources */ = {isa = PBXBuildFile; fileRef = 45D231761DC7E8F10034FA89 /* SessionResetJob.swift */; };
+		45DF5DF21DDB843F00C936C7 /* CompareSafetyNumbersActivity.swift in Sources */ = {isa = PBXBuildFile; fileRef = 45DF5DF11DDB843F00C936C7 /* CompareSafetyNumbersActivity.swift */; };
+		45DF5DF31DDB843F00C936C7 /* CompareSafetyNumbersActivity.swift in Sources */ = {isa = PBXBuildFile; fileRef = 45DF5DF11DDB843F00C936C7 /* CompareSafetyNumbersActivity.swift */; };
 		45EB32CF1D7465C900735B2E /* OWSLinkedDevicesTableViewController.m in Sources */ = {isa = PBXBuildFile; fileRef = 45EB32CE1D7465C900735B2E /* OWSLinkedDevicesTableViewController.m */; };
 		45F2B1941D9C9F48000D2C69 /* OWSOutgoingMessageCollectionViewCell.m in Sources */ = {isa = PBXBuildFile; fileRef = 45F2B1931D9C9F48000D2C69 /* OWSOutgoingMessageCollectionViewCell.m */; };
 		45F2B1971D9CA207000D2C69 /* OWSIncomingMessageCollectionViewCell.xib in Resources */ = {isa = PBXBuildFile; fileRef = 45F2B1951D9CA207000D2C69 /* OWSIncomingMessageCollectionViewCell.xib */; };
@@ -614,6 +616,7 @@
 		45CD81F01DC03A22004C9430 /* OWSLogger.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = OWSLogger.h; sourceTree = "<group>"; };
 		45CD81F11DC03A22004C9430 /* OWSLogger.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = OWSLogger.m; sourceTree = "<group>"; };
 		45D231761DC7E8F10034FA89 /* SessionResetJob.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; name = SessionResetJob.swift; path = Jobs/SessionResetJob.swift; sourceTree = "<group>"; };
+		45DF5DF11DDB843F00C936C7 /* CompareSafetyNumbersActivity.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = CompareSafetyNumbersActivity.swift; sourceTree = "<group>"; };
 		45E282DE1D08E67800ADD4C8 /* gl */ = {isa = PBXFileReference; lastKnownFileType = text.plist.strings; name = gl; path = translations/gl.lproj/Localizable.strings; sourceTree = "<group>"; };
 		45E282DF1D08E6CC00ADD4C8 /* id */ = {isa = PBXFileReference; lastKnownFileType = text.plist.strings; name = id; path = translations/id.lproj/Localizable.strings; sourceTree = "<group>"; };
 		45EB32CD1D7465C900735B2E /* OWSLinkedDevicesTableViewController.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = OWSLinkedDevicesTableViewController.h; sourceTree = "<group>"; };
@@ -1232,6 +1235,7 @@
 				45666EC71D994C0D008FE134 /* OWSGroupAvatarBuilder.h */,
 				45666EC81D994C0D008FE134 /* OWSGroupAvatarBuilder.m */,
 				45CD81EE1DC030E7004C9430 /* AccountManager.swift */,
+				45DF5DF11DDB843F00C936C7 /* CompareSafetyNumbersActivity.swift */,
 			);
 			path = Models;
 			sourceTree = "<group>";
@@ -2845,6 +2849,7 @@
 				76EB05E018170B33006006FC /* NetworkStream.m in Sources */,
 				FCFA64B71A24F6730007FB87 /* UIFont+OWS.m in Sources */,
 				B6B9ECFC198B31BA00C620D3 /* PushManager.m in Sources */,
+				45DF5DF21DDB843F00C936C7 /* CompareSafetyNumbersActivity.swift in Sources */,
 				76EB05D618170B33006006FC /* ZrtpResponder.m in Sources */,
 				B62D53F71A23CCAD009AAF82 /* TSMessageAdapter.m in Sources */,
 				FCD274EB1A5AFDDB00202277 /* AboutTableViewController.m in Sources */,
@@ -3144,6 +3149,7 @@
 				B660F76A1C29988E00687D6E /* EventWindow.m in Sources */,
 				B660F76B1C29988E00687D6E /* LoggingUtil.m in Sources */,
 				B660F76C1C29988E00687D6E /* AnonymousConditionLogger.m in Sources */,
+				45DF5DF31DDB843F00C936C7 /* CompareSafetyNumbersActivity.swift in Sources */,
 				B660F76D1C29988E00687D6E /* AnonymousOccurrenceLogger.m in Sources */,
 				B660F76E1C29988E00687D6E /* AnonymousValueLogger.m in Sources */,
 				B660F76F1C29988E00687D6E /* DiscardingLog.m in Sources */,

Signal/src/Models/CompareSafetyNumbersActivity.swift

@@ -0,0 +1,101 @@
+//  Created by Michael Kirk on 11/15/16.
+//  Copyright © 2016 Open Whisper Systems. All rights reserved.
+
+import Foundation
+
+let CompareSafetyNumbersActivityType = "org.whispersystems.signal.activity.CompareSafetyNumbers"
+
+@objc(OWSCompareSafetyNumbersActivityDelegate)
+protocol CompareSafetyNumbersActivityDelegate {
+    func compareSafetyNumbersActivitySucceeded(activity: CompareSafetyNumbersActivity) -> Void;
+    func compareSafetyNumbersActivity(_ activity: CompareSafetyNumbersActivity, failedWithError error: Error) -> Void;
+}
+
+@objc (OWSCompareSafetyNumbersActivity)
+class CompareSafetyNumbersActivity: UIActivity {
+
+    let TAG = "[CompareSafetyNumbersActivity]"
+    var mySafetyNumbers: String?
+    let delegate: CompareSafetyNumbersActivityDelegate
+
+    required init(delegate:CompareSafetyNumbersActivityDelegate) {
+        self.delegate = delegate
+        super.init()
+    }
+
+    // MARK: UIActivity
+
+    override class var activityCategory: UIActivityCategory {
+        get { return .action }
+    }
+
+    override var activityType: UIActivityType? {
+        get { return UIActivityType(rawValue: CompareSafetyNumbersActivityType) }
+    }
+
+    override var activityTitle: String? {
+        get {
+            return NSLocalizedString("COMPARE_SAFETY_NUMBER_ACTION", comment: "Activity Sheet label")
+        }
+    }
+
+    override var activityImage: UIImage? {
+        get {
+            return  #imageLiteral(resourceName: "ic_lock_outline")
+        }
+    }
+
+    override func canPerform(withActivityItems activityItems: [Any]) -> Bool {
+        return stringsFrom(activityItems:activityItems).count > 0
+    }
+
+    override func prepare(withActivityItems activityItems: [Any]) {
+        let myFormattedSafetyNumbers = stringsFrom(activityItems: activityItems).first
+        mySafetyNumbers = numericOnly(string: myFormattedSafetyNumbers)
+    }
+
+    override func perform() {
+        defer { activityDidFinish(true) }
+
+        let pasteboardString = numericOnly(string: UIPasteboard.general.string)
+        guard (pasteboardString != nil && pasteboardString!.characters.count == 60) else {
+            Logger.warn("\(TAG) no valid safety numbers found in pasteboard: \(pasteboardString)")
+            let error = OWSErrorWithCodeDescription(OWSErrorCode.userError,
+                                                    NSLocalizedString("PRIVACY_VERIFICATION_FAILED_NO_SAFETY_NUMBERS_IN_CLIPBOARD", comment: "Alert body for user error"))
+
+            delegate.compareSafetyNumbersActivity(self, failedWithError: error)
+            return
+        }
+
+        let pasteboardSafetyNumbers = pasteboardString!
+
+        if pasteboardSafetyNumbers == mySafetyNumbers {
+            Logger.info("\(TAG) successfully matched safety numbers. local numbers: \(mySafetyNumbers) pasteboard:\(pasteboardSafetyNumbers)")
+            delegate.compareSafetyNumbersActivitySucceeded(activity:self)
+        } else {
+            Logger.warn("\(TAG) local numbers: \(mySafetyNumbers) didn't match pasteboard:\(pasteboardSafetyNumbers)")
+            let error = OWSErrorWithCodeDescription(OWSErrorCode.privacyVerificationFailure,
+                                                    NSLocalizedString("PRIVACY_VERIFICATION_FAILED_MISMATCHED_SAFETY_NUMBERS_IN_CLIPBOARD", comment: "Alert body"))
+            delegate.compareSafetyNumbersActivity(self, failedWithError: error)
+        }
+    }
+
+    // MARK: Helpers
+
+    func numericOnly(string: String?) -> String? {
+        guard (string != nil) else {
+            return nil
+        }
+
+        var numericOnly: String?
+        if let regex = try? NSRegularExpression(pattern: "\\D", options: .caseInsensitive) {
+            numericOnly = regex.stringByReplacingMatches(in: string!, options: .withTransparentBounds, range: NSMakeRange(0, string!.characters.count), withTemplate: "")
+        }
+
+        return numericOnly
+    }
+
+    func stringsFrom(activityItems: [Any]) -> [String] {
+        return activityItems.map { $0 as? String }.filter { $0 != nil }.map { $0! }
+    }
+}

Signal/src/view controllers/FingerprintViewController.m

@@ -14,6 +14,7 @@
 #import "UIUtil.h"
 #import "UIViewController+CameraPermissions.h"
 #import <SignalServiceKit/NSDate+millisecondTimeStamp.h>
+#import <SignalServiceKit/OWSError.h>
 #import <SignalServiceKit/OWSFingerprint.h>
 #import <SignalServiceKit/TSInfoMessage.h>
 #import <SignalServiceKit/TSStorageManager+IdentityKeyStore.h>
@@ -23,7 +24,7 @@
 
 NS_ASSUME_NONNULL_BEGIN
 
-@interface FingerprintViewController () <OWSHighlightableLabelDelegate>
+@interface FingerprintViewController () <OWSHighlightableLabelDelegate, OWSCompareSafetyNumbersActivityDelegate>
 
 @property (strong, nonatomic) TSStorageManager *storageManager;
 @property (strong, nonatomic) TSThread *thread;
@@ -141,7 +142,7 @@ NS_ASSUME_NONNULL_BEGIN
 
 #pragma mark - HilightableLableDelegate
 
-- (void)didHighlightLabelWithLabel:(OWSHighlightableLabel *)label completion:(nullable void (^)(void))completionHandler
+- (void)didHighlightLabel:(OWSHighlightableLabel *)label completion:(nullable void (^)(void))completionHandler
 {
     [self showSharingActivityWithCompletion:completionHandler];
 }
@@ -150,32 +151,48 @@ NS_ASSUME_NONNULL_BEGIN
 {
     DDLogDebug(@"%@ Sharing safety numbers", self.tag);
 
+    OWSCompareSafetyNumbersActivity *compareActivity = [[OWSCompareSafetyNumbersActivity alloc] initWithDelegate:self];
+
     NSString *shareFormat = NSLocalizedString(@"SAFETY_NUMBER_SHARE_FORMAT", @"Snippet to share {{safety numbers}} with a friend. sent e.g. via sms");
     NSString *shareString = [NSString stringWithFormat:shareFormat, self.fingerprint.displayableText];
 
-    UIActivityViewController *activityController = [[UIActivityViewController alloc] initWithActivityItems:@[shareString]
-                                                                                     applicationActivities:nil];
+    UIActivityViewController *activityController =
+        [[UIActivityViewController alloc] initWithActivityItems:@[ shareString ]
+                                          applicationActivities:@[ compareActivity ]];
 
-    void (^activityControllerCompletionHandler)(UIActivityType __nullable activityType, BOOL completed, NSArray * __nullable returnedItems, NSError * __nullable activityError) = ^void(UIActivityType __nullable activityType, BOOL completed, NSArray * __nullable returnedItems, NSError * __nullable activityError){
+    activityController.completionWithItemsHandler = ^void(UIActivityType __nullable activityType, BOOL completed, NSArray * __nullable returnedItems, NSError * __nullable activityError){
         if (completionHandler) {
             completionHandler();
         }
         [UIUtil applySignalAppearence];
     };
 
-    activityController.completionWithItemsHandler = activityControllerCompletionHandler;
-
+    // This value was extracted by inspecting `activityType` in the activityController.completionHandler
+    NSString *const iCloudActivityType = @"com.apple.CloudDocsUI.AddToiCloudDrive";
     activityController.excludedActivityTypes = @[
         UIActivityTypePostToFacebook,
         UIActivityTypePostToWeibo,
         UIActivityTypeAirDrop,
-        UIActivityTypePostToTwitter
+        UIActivityTypePostToTwitter,
+        iCloudActivityType // This isn't being excluded. RADAR https://openradar.appspot.com/27493621
     ];
 
     [UIUtil applyDefaultSystemAppearence];
     [self presentViewController:activityController animated:YES completion:nil];
 }
 
+#pragma mark - OWSCompareSafetyNumbersActivityDelegate
+
+- (void)compareSafetyNumbersActivitySucceededWithActivity:(OWSCompareSafetyNumbersActivity *)activity
+{
+    [self showVerificationSucceeded];
+}
+
+- (void)compareSafetyNumbersActivity:(OWSCompareSafetyNumbersActivity *)activity failedWithError:(NSError *)error
+{
+    [self showVerificationFailedWithError:error];
+}
+
 #pragma mark - Action
 
 - (IBAction)closeButtonAction:(id)sender
@@ -230,45 +247,46 @@ NS_ASSUME_NONNULL_BEGIN
 {
     NSError *error;
     if ([self.fingerprint matchesLogicalFingerprintsData:combinedFingerprintData error:&error]) {
-        DDLogInfo(@"%@ Successfully verified privacy.", self.tag);
-        NSString *successTitle = NSLocalizedString(@"SUCCESSFUL_VERIFICATION_TITLE", nil);
-        NSString *dismissText = NSLocalizedString(@"DISMISS_BUTTON_TEXT", nil);
-        NSString *descriptionFormat = NSLocalizedString(
-            @"SUCCESSFUL_VERIFICATION_DESCRIPTION", @"Alert body after verifying privacy with {{other user's name}}");
-        NSString *successDescription = [NSString stringWithFormat:descriptionFormat, self.contactName];
-        UIAlertController *successAlertController =
-            [UIAlertController alertControllerWithTitle:successTitle
-                                                message:successDescription
-                                         preferredStyle:UIAlertControllerStyleAlert];
-        UIAlertAction *dismissAction =
-            [UIAlertAction actionWithTitle:dismissText
-                                     style:UIAlertActionStyleDefault
-                                   handler:^(UIAlertAction *_Nonnull action) {
-                                       [self dismissViewControllerAnimated:YES completion:nil];
-                                   }];
-        [successAlertController addAction:dismissAction];
-
-        [self presentViewController:successAlertController animated:YES completion:nil];
+        [self showVerificationSucceeded];
     } else {
-        [self failVerificationWithError:error];
+        [self showVerificationFailedWithError:error];
     }
 }
 
-- (void)failVerificationWithError:(NSError *)error
+- (void)showVerificationSucceeded
 {
-    NSString *failureTitle = NSLocalizedString(@"FAILED_VERIFICATION_TITLE", @"alert title");
+    DDLogInfo(@"%@ Successfully verified privacy.", self.tag);
+    NSString *successTitle = NSLocalizedString(@"SUCCESSFUL_VERIFICATION_TITLE", nil);
+    NSString *dismissText = NSLocalizedString(@"DISMISS_BUTTON_TEXT", nil);
+    NSString *descriptionFormat = NSLocalizedString(
+        @"SUCCESSFUL_VERIFICATION_DESCRIPTION", @"Alert body after verifying privacy with {{other user's name}}");
+    NSString *successDescription = [NSString stringWithFormat:descriptionFormat, self.contactName];
+    UIAlertController *successAlertController =
+        [UIAlertController alertControllerWithTitle:successTitle
+                                            message:successDescription
+                                     preferredStyle:UIAlertControllerStyleAlert];
+    UIAlertAction *dismissAction =
+        [UIAlertAction actionWithTitle:dismissText style:UIAlertActionStyleDefault handler:nil];
+    [successAlertController addAction:dismissAction];
+
+    [self presentViewController:successAlertController animated:YES completion:nil];
+}
+
+- (void)showVerificationFailedWithError:(NSError *)error
+{
+    NSString *_Nullable failureTitle;
+    if (error.code != OWSErrorCodeUserError) {
+        failureTitle = NSLocalizedString(@"FAILED_VERIFICATION_TITLE", @"alert title");
+    } // else no title. We don't want to show a big scary "VERIFICATION FAILED" when it's just user error.
+
     UIAlertController *failureAlertController =
         [UIAlertController alertControllerWithTitle:failureTitle
                                             message:error.localizedDescription
                                      preferredStyle:UIAlertControllerStyleAlert];
 
-    NSString *cancelText = NSLocalizedString(@"TXT_CANCEL_TITLE", nil);
-    UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:cancelText
-                                                           style:UIAlertActionStyleCancel
-                                                         handler:^(UIAlertAction *_Nonnull action) {
-                                                             [self dismissViewControllerAnimated:YES completion:nil];
-                                                         }];
-    [failureAlertController addAction:cancelAction];
+    NSString *dismissText = NSLocalizedString(@"DISMISS_BUTTON_TEXT", nil);
+    UIAlertAction *dismissAction = [UIAlertAction actionWithTitle:dismissText style:UIAlertActionStyleCancel handler:nil];
+    [failureAlertController addAction:dismissAction];
 
     // TODO
     //        NSString retryText = NSLocalizedString(@"RETRY_BUTTON_TEXT", nil);

Signal/src/views/HighlightableLabel.swift

@@ -5,7 +5,7 @@ import UIKit
 
 @objc(OWSHighlightableLabelDelegate)
 protocol HighlightableLabelDelegate {
-    func didHighlightLabel(label:HighlightableLabel, completion: (()->())?) -> ()
+    func didHighlightLabel(_ label:HighlightableLabel, completion: (()->())?) -> ()
 }
 
 @objc(OWSHighlightableLabel)
@@ -60,6 +60,6 @@ class HighlightableLabel : UILabel {
 
         becomeFirstResponder();
         showBorder()
-        self.delegate?.didHighlightLabel(label: self, completion:{ self.hideBorder() })
+        self.delegate?.didHighlightLabel(self, completion:{ self.hideBorder() })
     }
 }