[Payment Request] Sever card summary section in the credit card edit form

ios/chrome/browser/payments/credit_card_edit_view_controller.mm

 // Copyright 2017 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/payments/credit_card_edit_view_controller.h"
 
 #import "base/mac/foundation_util.h"
 #include "base/memory/ptr_util.h"
 #include "components/strings/grit/components_strings.h"
 #import "ios/chrome/browser/payments/payment_request_edit_view_controller+internal.h"
 #import "ios/chrome/browser/payments/payment_request_edit_view_controller_actions.h"
 #import "ios/chrome/browser/payments/payment_request_editor_field.h"
 #import "ios/chrome/browser/ui/autofill/autofill_ui_type.h"
 #import "ios/chrome/browser/ui/autofill/cells/autofill_edit_item.h"
 #import "ios/chrome/browser/ui/collection_view/cells/MDCCollectionViewCell+Chrome.h"
 #import "ios/chrome/browser/ui/collection_view/cells/collection_view_detail_item.h"
+#import "ios/chrome/browser/ui/collection_view/cells/collection_view_item+collection_view_controller.h"
 #import "ios/chrome/browser/ui/collection_view/cells/collection_view_switch_item.h"
 #import "ios/chrome/browser/ui/collection_view/collection_view_model.h"
 #import "ios/chrome/browser/ui/colors/MDCPalette+CrAdditions.h"
 #import "ios/chrome/browser/ui/uikit_ui_util.h"
 #import "ios/third_party/material_components_ios/src/components/Typography/src/MaterialTypography.h"
 #include "ui/base/l10n/l10n_util.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
 namespace {
 
 NSString* const kCreditCardEditCollectionViewId =
     @"kCreditCardEditCollectionViewId";
 
 typedef NS_ENUM(NSInteger, SectionIdentifier) {
-  SectionIdentifierBillingAddress = kSectionIdentifierEnumStart,
+  SectionIdentifierCardSummary = kSectionIdentifierEnumStart,
+  SectionIdentifierBillingAddress,
   SectionIdentifierSaveCard,
 };
 
 typedef NS_ENUM(NSInteger, ItemType) {
-  ItemTypeBillingAddress = kItemTypeEnumStart,
+  ItemTypeCardSummary = kItemTypeEnumStart,
+  ItemTypeBillingAddress,
   ItemTypeSaveCard,
 };
 
 }  // namespace
 
 @interface CreditCardEditViewController () {
   NSArray<EditorField*>* _fields;
 
   // Indicates whether the credit card being created should be saved locally.
   BOOL _saveCreditCard;
@@ skipping 98 matching lines @@
     for (EditorField* field in _fields) {
       AutofillEditItem* item = field.item;
       if (field.autofillUIType == AutofillUITypeCreditCardNumber) {
         item.cardTypeIcon =
             [_dataSource cardTypeIconFromCardNumber:field.value];
       }
     }
   }
 }
 
+- (void)loadHeaderItems {
+  [super loadHeaderItems];
+  CollectionViewModel* model = self.collectionViewModel;
+
+  // Server card summary section.
+  CollectionViewItem* serverCardSummaryItem =
+      [_dataSource serverCardSummaryItem];
+  if (serverCardSummaryItem) {
+    [model addSectionWithIdentifier:SectionIdentifierCardSummary];
+    serverCardSummaryItem.type = ItemTypeCardSummary;
+    [model addItem:serverCardSummaryItem
+        toSectionWithIdentifier:SectionIdentifierCardSummary];
+  }
+}
+
 - (void)loadFooterItems {
   CollectionViewModel* model = self.collectionViewModel;
 
   // Billing Address section.
   [model addSectionWithIdentifier:SectionIdentifierBillingAddress];
   CollectionViewDetailItem* billingAddressItem =
       [[CollectionViewDetailItem alloc] initWithType:ItemTypeBillingAddress];
   billingAddressItem.text = [NSString
       stringWithFormat:@"%@*",
                        l10n_util::GetNSString(IDS_PAYMENTS_BILLING_ADDRESS)];
@@ skipping 92 matching lines @@
 
 #pragma mark UICollectionViewDelegate
 
 - (void)collectionView:(UICollectionView*)collectionView
     didSelectItemAtIndexPath:(NSIndexPath*)indexPath {
   [super collectionView:collectionView didSelectItemAtIndexPath:indexPath];
 
   CollectionViewItem* item =
       [self.collectionViewModel itemAtIndexPath:indexPath];
   switch (item.type) {
+    case ItemTypeCardSummary:
     case ItemTypeSaveCard:
       break;
     case ItemTypeBillingAddress: {
       // TODO(crbug.com/602666): Display a list of billing addresses.
       break;
     }
     default:
       break;
   }
 }
 
 #pragma mark MDCCollectionViewStylingDelegate
 
 - (CGFloat)collectionView:(UICollectionView*)collectionView
     cellHeightAtIndexPath:(NSIndexPath*)indexPath {
   CollectionViewItem* item =
       [self.collectionViewModel itemAtIndexPath:indexPath];
   switch (item.type) {
     case ItemTypeBillingAddress:
       return MDCCellDefaultOneLineHeight;
+    case ItemTypeCardSummary:
     case ItemTypeSaveCard:
       return [MDCCollectionViewCell
           cr_preferredHeightForWidth:CGRectGetWidth(collectionView.bounds)
                              forItem:item];
     default:
       return
           [super collectionView:collectionView cellHeightAtIndexPath:indexPath];
   }
 }
 
 - (BOOL)collectionView:(UICollectionView*)collectionView
     hidesInkViewAtIndexPath:(NSIndexPath*)indexPath {
   NSInteger type = [self.collectionViewModel itemTypeForIndexPath:indexPath];
   switch (type) {
+    case ItemTypeCardSummary:
     case ItemTypeSaveCard:
       return YES;
     default:
       return [super collectionView:collectionView
            hidesInkViewAtIndexPath:indexPath];
   }
 }
 
 #pragma mark Switch Actions
 
 - (void)saveCardSwitchToggled:(UISwitch*)sender {
   _saveCreditCard = sender.isOn;
 }
 
 @end