Prevent existing card number to be used for new credit cards in the Payment Request

chrome/browser/ui/views/payments/credit_card_editor_view_controller.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_VIEWS_PAYMENTS_CREDIT_CARD_EDITOR_VIEW_CONTROLLER_H_
 #define CHROME_BROWSER_UI_VIEWS_PAYMENTS_CREDIT_CARD_EDITOR_VIEW_CONTROLLER_H_
 
 #include <memory>
 #include <set>
 #include <string>
@@ skipping 49 matching lines @@
   bool ValidateModelAndSave() override;
   std::unique_ptr<ValidationDelegate> CreateValidationDelegate(
       const EditorField& field) override;
   std::unique_ptr<ui::ComboboxModel> GetComboboxModelForType(
       const autofill::ServerFieldType& type) override;
 
   // Selects the icon in the UI corresponding to |basic_card_network| with
   // higher opacity. If empty string, selects none of them (all full opacity).
   void SelectBasicCardNetworkIcon(const std::string& basic_card_network);
 
+  // Exposed for validation delegate.
+  bool IsValidCreditCardNumber(const base::string16& card_number,
+                               base::string16* error_message);
+
  protected:
   // PaymentRequestSheetController:
   void FillContentView(views::View* content_view) override;
   base::string16 GetSheetTitle() override;
   void ButtonPressed(views::Button* sender, const ui::Event& event) override;
 
  private:
   class CreditCardValidationDelegate : public ValidationDelegate {
    public:
     // Used to validate |field| type. A reference to the |controller| should
-    // outlive this delegate, and a list of |supported_card_networks| can be
-    // passed in to validate |field| (the data will be copied to the delegate).
-    CreditCardValidationDelegate(
-        const EditorField& field,
-        CreditCardEditorViewController* controller,
-        const std::vector<std::string>& supported_card_networks);
+    // outlive this delegate.
+    CreditCardValidationDelegate(const EditorField& field,
+                                 CreditCardEditorViewController* controller);
     ~CreditCardValidationDelegate() override;
 
     // ValidationDelegate:
     bool ShouldFormat() override;
     base::string16 Format(const base::string16& text) override;
     bool IsValidTextfield(views::Textfield* textfield) override;
     bool IsValidCombobox(views::Combobox* combobox) override;
     bool TextfieldValueChanged(views::Textfield* textfield,
                                bool was_blurred) override;
     bool ComboboxValueChanged(views::Combobox* combobox) override;
     void ComboboxModelChanged(views::Combobox* combobox) override {}
 
    private:
     // Validates a specific |value|/|combobox|.
     bool ValidateValue(const base::string16& value,
                        base::string16* error_message);
     bool ValidateCombobox(views::Combobox* combobox,
                           base::string16* error_message);
 
     EditorField field_;
     // Outlives this class.
     CreditCardEditorViewController* controller_;
-    // The list of supported basic card networks.
-    std::set<std::string> supported_card_networks_;
 
     DISALLOW_COPY_AND_ASSIGN(CreditCardValidationDelegate);
   };
 
   bool GetSheetId(DialogViewID* sheet_id) override;
 
   // Called when a new address was created to be used as the billing address.
   // The lifespan of |profile| beyond this call is undefined but it's OK, it's
   // simply propagated to the address combobox model.
   void AddAndSelectNewBillingAddress(const autofill::AutofillProfile& profile);
 
   // Called when |credit_card_to_edit_| was successfully edited.
   base::OnceClosure on_edited_;
   // Called when a new card was added. The const reference is short-lived, and
   // the callee should make a copy.
   base::OnceCallback<void(const autofill::CreditCard&)> on_added_;
 
   // If non-nullptr, a pointer to an object to be edited. Must outlive this
   // controller.
   autofill::CreditCard* credit_card_to_edit_;
 
   // Keeps track of the card icons currently visible, keyed by basic card
   // network.
   std::map<std::string, views::View*> card_icons_;
 
   // The value to use for the add billing address button tag.
   int add_billing_address_button_tag_;
 
+  // The list of supported basic card networks.
+  std::set<std::string> supported_card_networks_;
+
   DISALLOW_COPY_AND_ASSIGN(CreditCardEditorViewController);
 };
 
 }  // namespace payments
 
 #endif  // CHROME_BROWSER_UI_VIEWS_PAYMENTS_CREDIT_CARD_EDITOR_VIEW_CONTROLLER_H_