PaymentRequest Mojo bindings.

third_party/WebKit/Source/modules/payments/PaymentsValidators.cpp

+// 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.
+
+#include "modules/payments/PaymentsValidators.h"
+
+namespace blink {
+
+bool isValidCurrencyCodeFormat(const String& code, String* optionalErrorMessage)
+{
+    if (code.length() != 3) {
+        if (optionalErrorMessage)
+            *optionalErrorMessage = "'" + code + "' is not a valid ISO 4217 currency code, should be 3 letters";
+        return false;
+    }
+
+    for (size_t i = 0; i < code.length(); ++i) {
+        if (code[i] < 'A' || code[i] > 'Z') {
+            if (optionalErrorMessage)
+                *optionalErrorMessage = "'" + code + "' is not a valid ISO 4217 currency code, should be upper case letters [A-Z]";
+            return false;
+        }
+    }
+
+    return true;
+}
+
+bool isValidAmountFormat(const String& amount, String* optionalErrorMessage)
+{
+    if (amount.isEmpty()) {
+        if (optionalErrorMessage)
+            *optionalErrorMessage = "'" + amount + "' is not a valid ISO 200222 CurrencyAnd30Amount currency amount, should be nonempty";
+        return false;
+    }
+
+    if (amount.length() > 32) {
+        if (optionalErrorMessage)
+            *optionalErrorMessage = "'" + amount + "' is not a valid ISO 200222 CurrencyAnd30Amount currency amount, should be at most 32 characters";
+        return false;
+    }
+
+    int numberOfPeriods = 0;
+    int numberOfDigits = 0;
+    int numberOfFractionDigits = 0;
+    for (size_t i = 0; i < amount.length(); ++i) {
+        if (i == 0 && amount[i] == '-')
+            continue;
+
+        bool isPeriod = amount[i] == '.';
+        bool isDigit = amount[i] >= '0' && amount[i] <= '9';
+        if (!isPeriod && !isDigit) {
+            if (optionalErrorMessage)
+                *optionalErrorMessage = "'" + amount + "' is not a valid ISO 200222 CurrencyAnd30Amount currency amount, should contain only '.' and [0-9] with optional prefix '-'";
+            return false;
+        }
+
+        if (isPeriod) {
+            if (numberOfDigits == 0) {
+                if (optionalErrorMessage)
+                    *optionalErrorMessage = "'" + amount + "' is not a valid ISO 200222 CurrencyAnd30Amount currency amount, '.' should follow at least one digit";
+                return false;
+            }
+            ++numberOfPeriods;
+        }
+
+        if (isDigit) {
+            ++numberOfDigits;
+            if (numberOfPeriods > 0)
+                ++numberOfFractionDigits;
+        }
+    }
+
+    if (numberOfPeriods > 1) {
+        if (optionalErrorMessage)
+            *optionalErrorMessage = "'" + amount + "' is not a valid ISO 200222 CurrencyAnd30Amount currency amount, should contain at most one '.'";
+        return false;
+    }
+
+    if (numberOfPeriods > 0 && numberOfFractionDigits == 0) {
+        if (optionalErrorMessage)
+            *optionalErrorMessage = "'" + amount + "' is not a valid ISO 200222 CurrencyAnd30Amount currency amount, at least one digit should follow '.'";
+        return false;
+    }
+
+    if (numberOfDigits == 0) {
+        if (optionalErrorMessage)
+            *optionalErrorMessage = "'" + amount + "' is not a valid ISO 200222 CurrencyAnd30Amount currency amount, should contain at least one digit";
+        return false;
+    }
+
+    if (numberOfDigits > 30) {
+        if (optionalErrorMessage)
+            *optionalErrorMessage = "'" + amount + "' is not a valid ISO 200222 CurrencyAnd30Amount currency amount, should contain at most 30 digits";
+        return false;
+    }
+
+    if (numberOfFractionDigits > 10) {
+        if (optionalErrorMessage)
+            *optionalErrorMessage = "'" + amount + "' is not a valid ISO 200222 CurrencyAnd30Amount currency amount, should contain at most 10 fraction digits";
+        return false;
+    }
+
+    return true;
+}
+
+bool isValidRegionCodeFormat(const String& code, String* optionalErrorMessage)
+{
+    if (code.length() != 2) {
+        if (optionalErrorMessage)
+            *optionalErrorMessage = "'" + code + "' is not a valid ISO 3166 country code, should be 2 letters";
+        return false;
+    }
+
+    for (size_t i = 0; i < code.length(); ++i) {
+        if (code[i] < 'A' || code[i] > 'Z') {
+            if (optionalErrorMessage)
+                *optionalErrorMessage = "'" + code + "' is not a valid ISO 3166 country code, should be upper case letters [A-Z]";
+            return false;
+        }
+    }
+
+    return true;
+}
+
+bool isValidLanguageCodeFormat(const String& code, String* optionalErrorMessage)
+{
+    if (code.isEmpty())
+        return true;
+
+    if (code.length() != 2 && code.length() != 3) {
+        if (optionalErrorMessage)
+            *optionalErrorMessage = "'" + code + "' is not a valid ISO 639 language code, should be 2-3 letters";
+        return false;
+    }
+
+    for (size_t i = 0; i < code.length(); ++i) {
+        if (code[i] < 'a' || code[i] > 'z') {
+            if (optionalErrorMessage)
+                *optionalErrorMessage = "'" + code + "' is not a valid ISO 639 language code, should be lower case letters [a-z]";
+            return false;
+        }
+    }
+
+    return true;
+}
+
+bool isValidScriptCodeFormat(const String& code, String* optionalErrorMessage)
+{
+    if (code.isEmpty())
+        return true;
+
+    if (code.length() != 4) {
+        if (optionalErrorMessage)
+            *optionalErrorMessage = "'" + code + "' is not a valid ISO 1524 script code, should be 4 letters";
+        return false;
+    }
+
+    if (code[0] < 'A' || code[0] > 'Z') {
+        if (optionalErrorMessage)
+            *optionalErrorMessage = "'" + code + "' is not a valid ISO 1524 script code, first letter should be upper case [A-Z]";
+        return false;
+    }
+
+    for (size_t i = 1; i < code.length(); ++i) {
+        if (code[i] < 'a' || code[i] > 'z') {
+            if (optionalErrorMessage)
+                *optionalErrorMessage = "'" + code + "' is not a valid ISO 1524 script code, letters 2-4 should be lower case [a-z]";
+            return false;
+        }
+    }
+
+    return true;
+}
+
+} // namespace blink