[Payment Request] Selector view edit mode

ios/chrome/browser/ui/payments/payment_method_selection_coordinator.mm

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "ios/chrome/browser/ui/payments/payment_method_selection_coordinator.h"
 
 #include "components/autofill/core/browser/credit_card.h"
 #include "components/strings/grit/components_strings.h"
 #include "ios/chrome/browser/payments/payment_request.h"
 #include "ios/chrome/browser/ui/payments/payment_method_selection_mediator.h"
@@ skipping 11 matching lines @@
 @interface PaymentMethodSelectionCoordinator ()
 
 @property(nonatomic, strong)
     CreditCardEditCoordinator* creditCardEditCoordinator;
 
 @property(nonatomic, strong)
     PaymentRequestSelectorViewController* viewController;
 
 @property(nonatomic, strong) PaymentMethodSelectionMediator* mediator;
 
+// Initializes and starts the CreditCardEditCoordinator. Sets |creditCard| as
+// the credit card to be edited.
+- (void)startCreditCardEditCoordinatorWithCreditCard:
+    (autofill::CreditCard*)creditCard;
+
 // Called when the user selects a payment method. The cell is checked, the
 // UI is locked so that the user can't interact with it, then the delegate is
 // notified. The delay is here to let the user get a visual feedback of the
 // selection before this view disappears.
 - (void)delayedNotifyDelegateOfSelection:(autofill::CreditCard*)paymentMethod;
 
 @end
 
 @implementation PaymentMethodSelectionCoordinator
 @synthesize paymentRequest = _paymentRequest;
@@ skipping 40 matching lines @@
                                              ->credit_cards()[index]];
 }
 
 - (void)paymentRequestSelectorViewControllerDidFinish:
     (PaymentRequestSelectorViewController*)controller {
   [self.delegate paymentMethodSelectionCoordinatorDidReturn:self];
 }
 
 - (void)paymentRequestSelectorViewControllerDidSelectAddItem:
     (PaymentRequestSelectorViewController*)controller {
-  self.creditCardEditCoordinator = [[CreditCardEditCoordinator alloc]
-      initWithBaseViewController:self.viewController];
-  self.creditCardEditCoordinator.paymentRequest = self.paymentRequest;
-  self.creditCardEditCoordinator.delegate = self;
-  [self.creditCardEditCoordinator start];
+  [self startCreditCardEditCoordinatorWithCreditCard:nil];
+}
+
+- (void)paymentRequestSelectorViewControllerDidToggleEditingMode {
+  [self.viewController loadModel];
+  [self.viewController.collectionView reloadData];
+}
+
+- (void)paymentRequestSelectorViewController:
+            (PaymentRequestSelectorViewController*)controller
+              didSelectItemAtIndexForEditing:(NSUInteger)index {
+  DCHECK(index < self.paymentRequest->credit_cards().size());
+  [self
+      startCreditCardEditCoordinatorWithCreditCard:self.paymentRequest
+                                                       ->credit_cards()[index]];
 }
 
 #pragma mark - CreditCardEditCoordinatorDelegate
 
 - (void)creditCardEditCoordinator:(CreditCardEditCoordinator*)coordinator
        didFinishEditingCreditCard:(autofill::CreditCard*)creditCard {
+  // Update the data source with the new data.
+  [self.mediator loadItems];
+
+  [self.viewController loadModel];
+  [self.viewController.collectionView reloadData];
+
   [self.creditCardEditCoordinator stop];
   self.creditCardEditCoordinator = nil;
 
-  // Inform |self.delegate| that this card has been selected.
-  [self.delegate paymentMethodSelectionCoordinator:self
-                            didSelectPaymentMethod:creditCard];
+  if (self.mediator.state != PaymentRequestSelectorStateEdit) {
+    // Inform |self.delegate| that this card has been selected.
+    [self.delegate paymentMethodSelectionCoordinator:self
+                              didSelectPaymentMethod:creditCard];
+  }
 }
 
 - (void)creditCardEditCoordinatorDidCancel:
     (CreditCardEditCoordinator*)coordinator {
   [self.creditCardEditCoordinator stop];
   self.creditCardEditCoordinator = nil;
 }
 
 #pragma mark - Helper methods
 
+- (void)startCreditCardEditCoordinatorWithCreditCard:
+    (autofill::CreditCard*)creditCard {
+  self.creditCardEditCoordinator = [[CreditCardEditCoordinator alloc]
+      initWithBaseViewController:self.viewController];
+  self.creditCardEditCoordinator.paymentRequest = self.paymentRequest;
+  self.creditCardEditCoordinator.creditCard = creditCard;
+  self.creditCardEditCoordinator.delegate = self;
+  [self.creditCardEditCoordinator start];
+}
+
 - (void)delayedNotifyDelegateOfSelection:(autofill::CreditCard*)paymentMethod {
   self.viewController.view.userInteractionEnabled = NO;
   __weak PaymentMethodSelectionCoordinator* weakSelf = self;
   dispatch_after(
       dispatch_time(DISPATCH_TIME_NOW, kDelegateNotificationDelayInNanoSeconds),
       dispatch_get_main_queue(), ^{
         weakSelf.viewController.view.userInteractionEnabled = YES;
         [weakSelf.delegate paymentMethodSelectionCoordinator:weakSelf
                                       didSelectPaymentMethod:paymentMethod];
       });
 }
 
 @end