[Payment Request] Refactors PaymentRequestCoordinator.

ios/chrome/browser/ui/payments/payment_request_view_controller.h

 // 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.
 
 #ifndef IOS_CHROME_BROWSER_UI_PAYMENTS_PAYMENT_REQUEST_VIEW_CONTROLLER_H_
 #define IOS_CHROME_BROWSER_UI_PAYMENTS_PAYMENT_REQUEST_VIEW_CONTROLLER_H_
 
 #import <UIKit/UIKit.h>
 
 #include "ios/chrome/browser/payments/payment_request.h"
 #import "ios/chrome/browser/ui/collection_view/cells/collection_view_footer_item.h"
 #import "ios/chrome/browser/ui/collection_view/collection_view_controller.h"
 
 extern NSString* const kPaymentRequestCollectionViewID;
 
 class PaymentRequest;
 
 @class PaymentRequestViewController;
 
+// Data source protocol for PaymentRequestViewController.
+@protocol PaymentRequestViewControllerDataSource<NSObject>
+
+// Returns the authenticated account name, if a user is authenticated.
+// Otherwise, returns nil.
+- (NSString*)authenticatedAccountName;

[Moe, 2017/05/08 21:24:12]

Optional: You could have the data source simply return the footer text and that
way refactor a bunch of logic into the mediator and also get rid of
showPaymentDataSource property.

[marq (ping after 24h), 2017/05/09 09:00:33]

+1, good suggestion. This can be in a follow-up CL.

[macourteau, 2017/05/09 15:21:53]

Ack, will do in a follow-up CL.

+
+@end
+
 // Delegate protocol for PaymentRequestViewController.
 @protocol PaymentRequestViewControllerDelegate<NSObject>
 
 // Notifies the delegate that the user has canceled the payment request.
 - (void)paymentRequestViewControllerDidCancel:
     (PaymentRequestViewController*)controller;
 
 // Notifies the delegate that the user has confirmed the payment request.
 - (void)paymentRequestViewControllerDidConfirm:
     (PaymentRequestViewController*)controller;
@@ skipping 36 matching lines @@
 @property(nonatomic, copy) NSString* pageHost;
 
 // Whether or not the view is in a pending state.
 @property(nonatomic, assign, getter=isPending) BOOL pending;
 
 // The delegate to be notified when the user confirms or cancels the request.
 @property(nonatomic, weak) id<PaymentRequestViewControllerDelegate> delegate;
 
 // Whether the data source should be shown (usually until the first payment
 // has been completed) or not.
-@property(nonatomic, assign) BOOL showDataSource;
+@property(nonatomic, assign) BOOL showPaymentDataSource;
 
-// If the user is signed in, the name of the authenticated account.
-@property(nonatomic, copy) NSString* authenticatedAccountName;
+@property(nonatomic, weak) id<PaymentRequestViewControllerDataSource>
+    dataSource;
 
 // Updates the payment summary section UI. If |totalValueChanged| is YES,
 // adds a label to the total amount item indicating that the total amount was
 // updated.
 - (void)updatePaymentSummaryWithTotalValueChanged:(BOOL)totalValueChanged;
 
 // Updates the selected shipping address.
 - (void)updateSelectedShippingAddressUI;
 
 // Updates the selected shipping option.
 - (void)updateSelectedShippingOptionUI;
 
 // Updates the selected payment method.
 - (void)updateSelectedPaymentMethodUI;
 
 // Initializes this object with an instance of PaymentRequest which has a copy
 // of web::PaymentRequest as provided by the page invoking the Payment Request
 // API. This object will not take ownership of |paymentRequest|.
 - (instancetype)initWithPaymentRequest:(PaymentRequest*)paymentRequest
     NS_DESIGNATED_INITIALIZER;
 
 - (instancetype)init NS_UNAVAILABLE;
 
 - (instancetype)initWithStyle:(CollectionViewControllerStyle)style
     NS_UNAVAILABLE;
 
 @end
 
 #endif  // IOS_CHROME_BROWSER_UI_PAYMENTS_PAYMENT_REQUEST_VIEW_CONTROLLER_H_