[Payments] Show what's missing for incomplete payment methods.

components/autofill/core/browser/validation.cc

 // Copyright 2013 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 "components/autofill/core/browser/validation.h"
 
 #include <stddef.h>
 
 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 107 matching lines @@
   }
 
   if (IsValidCreditCardNumber(text))
     return true;
 
   *error_message = l10n_util::GetStringUTF16(
       IDS_PAYMENTS_CARD_NUMBER_INVALID_VALIDATION_MESSAGE);
   return false;
 }
 
+CreditCardCompletionStatus GetCompletionStatusForCard(
+    const CreditCard& card,
+    const std::string& app_locale) {
+  CreditCardCompletionStatus status = CREDIT_CARD_COMPLETE;
+  if (card.IsExpired(autofill::AutofillClock::Now()))
+    status |= CREDIT_CARD_EXPIRED;
+
+  if (card.number().empty())
+    status |= CREDIT_CARD_NO_NUMBER;
+
+  if (card.GetInfo(autofill::AutofillType(autofill::CREDIT_CARD_NAME_FULL),
+                   app_locale)
+          .empty()) {
+    status |= CREDIT_CARD_NO_CARDHOLDER;
+  }
+
+  return status;
+}
+
+base::string16 GetCompletionMessageForCard(CreditCardCompletionStatus status) {
+  switch (status) {
+    case CREDIT_CARD_COMPLETE:
+      return base::string16();
+    case CREDIT_CARD_EXPIRED:
+      return l10n_util::GetStringUTF16(
+          IDS_PAYMENTS_VALIDATION_INVALID_CREDIT_CARD_EXPIRED);
+    case CREDIT_CARD_NO_CARDHOLDER:
+      return l10n_util::GetStringUTF16(IDS_PAYMENTS_NAME_ON_CARD_REQUIRED);
+    case CREDIT_CARD_NO_NUMBER:
+      return l10n_util::GetStringUTF16(
+          IDS_PAYMENTS_CARD_NUMBER_INVALID_VALIDATION_MESSAGE);
+    default:
+      // Multiple things are missing
+      return l10n_util::GetStringUTF16(IDS_PAYMENTS_MORE_INFORMATION_REQUIRED);
+  }
+}
+
 bool IsValidEmailAddress(const base::string16& text) {
   // E-Mail pattern as defined by the WhatWG. (4.10.7.1.5 E-Mail state)
   const base::string16 kEmailPattern = base::ASCIIToUTF16(
       "^[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+@"
       "[a-zA-Z0-9-]+(?:\\.[a-zA-Z0-9-]+)*$");
   return MatchesPattern(text, kEmailPattern);
 }
 
 bool IsValidState(const base::string16& text) {
   return !state_names::GetAbbreviationForName(text).empty() ||
@@ skipping 182 matching lines @@
     return AMEX_CVC_LENGTH;
 
   return GENERAL_CVC_LENGTH;
 }
 
 bool IsUPIVirtualPaymentAddress(const base::string16& value) {
   return MatchesPattern(value, base::ASCIIToUTF16(kUPIVirtualPaymentAddressRe));
 }
 
 }  // namespace autofill