[Web Payments] Common Payments validation

components/payments/payments_validators.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 COMPONENTS_PAYMENTS_PAYMENTS_VALIDATORS_H_
+#define COMPONENTS_PAYMENTS_PAYMENTS_VALIDATORS_H_
+
+#include <string>
+
+#include "components/payments/payment_request.mojom.h"
+
+namespace payments {
+
+class PaymentsValidators {
+ public:
+  // The most common identifiers are three-letter alphabetic codes as defined by
+  // [ISO4217] (for example, "USD" for US Dollars)
+  // however any string of at most 2048 characters is considered valid. Returns
+  // false if currency |code| is too long (greater than 2048).
+  static bool isValidCurrencyCodeFormat(const std::string& code,

[please use gerrit instead, 2016/10/28 18:38:58]

This validator now has "system" parameter.

https://cs.chromium.org/chromium/src/third_party/WebKit/Source/modules/paymen...

Sorry!

[Kevin Bailey, 2016/10/28 20:53:05]

I've added the parameter, but no one added it to the Mojo file after they added
it to the WebIDL. Shall I do that, and the converter too?

[please use gerrit instead, 2016/10/31 13:17:33]

SGTM. It's good that we're finding these discrepancies now and unifying the
renderer and browser implementations. This will help us to move faster in the
future.

[Kevin Bailey, 2016/10/31 14:10:03]

Done.

+                                        std::string* optionalErrorMessage);
+
+  // Returns true if |amount| is a valid currency code as defined in ISO 20022
+  // CurrencyAnd30Amount.
+  static bool isValidAmountFormat(const std::string& amount,
+                                  std::string* optionalErrorMessage);
+};
+
+}  // namespace payments
+
+#endif  // COMPONENTS_PAYMENTS_PAYMENTS_VALIDATORS_H_