[Autofill] Credit Card Autofill Last Used Date Experiment

components/autofill/core/browser/credit_card.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/credit_card.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
 #include <ostream>
 #include <string>
 
 #include "base/guid.h"
+#include "base/i18n/time_formatting.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/strings/string16.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/time/time.h"
 #include "build/build_config.h"
 #include "components/autofill/core/browser/autofill_data_util.h"
+#include "components/autofill/core/browser/autofill_experiments.h"
 #include "components/autofill/core/browser/autofill_field.h"
 #include "components/autofill/core/browser/autofill_type.h"
 #include "components/autofill/core/browser/validation.h"
 #include "components/autofill/core/common/autofill_clock.h"
 #include "components/autofill/core/common/autofill_l10n_util.h"
 #include "components/autofill/core/common/autofill_regexes.h"
 #include "components/autofill/core/common/form_field_data.h"
 #include "grit/components_scaled_resources.h"
 #include "grit/components_strings.h"
 #include "third_party/icu/source/common/unicode/uloc.h"
 #include "third_party/icu/source/i18n/unicode/dtfmtsym.h"
 #include "ui/base/l10n/l10n_util.h"
 
 using base::ASCIIToUTF16;
 
 namespace autofill {
 
 const base::char16 kMidlineEllipsis[] = { 0x0020, 0x0020,
                                           0x2022, 0x2006,
                                           0x2022, 0x2006,
                                           0x2022, 0x2006,
                                           0x2022, 0x2006, 0 };
 
 namespace {
 
 const base::char16 kCreditCardObfuscationSymbol = '*';
+const char kTimeFormatPatternNoYearShortMonthDate[] = "MMMdd";

[Mathieu, 2017/02/12 20:42:05]

Can you add a comment giving an example date produced by this pattern (for the
future reader)

[jiahuiguo, 2017/02/13 21:04:10]

Done.

 
 bool ConvertYear(const base::string16& year, int* num) {
   // If the |year| is empty, clear the stored value.
   if (year.empty()) {
     *num = 0;
     return true;
   }
 
   // Try parsing the |year| as a number.
   if (base::StringToInt(year, num))
@@ skipping 468 matching lines @@
   expiration_month_ = credit_card.expiration_month_;
   expiration_year_ = credit_card.expiration_year_;
   server_id_ = credit_card.server_id_;
   server_status_ = credit_card.server_status_;
   billing_address_id_ = credit_card.billing_address_id_;
 
   set_guid(credit_card.guid());
   set_origin(credit_card.origin());
 }
 
+base::string16 CreditCard::GetLastUsedDateForDisplay(
+    const std::string& app_locale) const {
+  bool show_expiration_date =
+      ShowExpirationDateInAutofillCreditCardLastUsedDate();
+
+  DCHECK(use_count() > 0);
+  // use_count() is initialized as 1 when the card is just added.
+  if (use_count() == 1) {
+    return show_expiration_date
+               ? l10n_util::GetStringFUTF16(
+                     IDS_AUTOFILL_CREDIT_CARD_EXP_AND_ADDED_DATE,
+                     GetInfo(AutofillType(CREDIT_CARD_EXP_DATE_2_DIGIT_YEAR),
+                             app_locale),
+                     base::TimeFormatWithPattern(
+                         use_date(), kTimeFormatPatternNoYearShortMonthDate))
+               : l10n_util::GetStringFUTF16(
+                     IDS_AUTOFILL_CREDIT_CARD_ADDED_DATE,
+                     base::TimeFormatWithPattern(
+                         use_date(), kTimeFormatPatternNoYearShortMonthDate));
+  }
+
+  // use_count() > 1 when the card has been used in autofill.
+
+  // If the card was last used in autofill more than a year ago,
+  // display "last used > 1 year ago" without showing date detail.
+  if ((AutofillClock::Now() - use_date()).InDays() > 365) {
+    return show_expiration_date
+               ? l10n_util::GetStringFUTF16(
+                     IDS_AUTOFILL_CREDIT_CARD_EXP_AND_LAST_USED_YEAR_AGO,
+                     GetInfo(AutofillType(CREDIT_CARD_EXP_DATE_2_DIGIT_YEAR),
+                             app_locale))
+               : l10n_util::GetStringUTF16(
+                     IDS_AUTOFILL_CREDIT_CARD_LAST_USED_YEAR_AGO);
+  }
+
+  // If the card was last used in autofill within a year, show date information.
+  return show_expiration_date
+             ? l10n_util::GetStringFUTF16(
+                   IDS_AUTOFILL_CREDIT_CARD_EXP_AND_LAST_USED_DATE,
+                   GetInfo(AutofillType(CREDIT_CARD_EXP_DATE_2_DIGIT_YEAR),
+                           app_locale),
+                   base::TimeFormatWithPattern(
+                       use_date(), kTimeFormatPatternNoYearShortMonthDate))
+             : l10n_util::GetStringFUTF16(
+                   IDS_AUTOFILL_CREDIT_CARD_LAST_USED_DATE,
+                   base::TimeFormatWithPattern(
+                       use_date(), kTimeFormatPatternNoYearShortMonthDate));
+}
+
 bool CreditCard::UpdateFromImportedCard(const CreditCard& imported_card,
                                         const std::string& app_locale) {
   if (this->GetInfo(AutofillType(CREDIT_CARD_NUMBER), app_locale) !=
           imported_card.GetInfo(AutofillType(CREDIT_CARD_NUMBER), app_locale)) {
     return false;
   }
 
   // Heuristically aggregated data should never overwrite verified data, with
   // the exception of expired verified cards. Instead, discard any heuristically
   // aggregated credit cards that disagree with explicitly entered data, so that
@@ skipping 323 matching lines @@
 const char kDinersCard[] = "dinersCC";
 const char kDiscoverCard[] = "discoverCC";
 const char kGenericCard[] = "genericCC";
 const char kJCBCard[] = "jcbCC";
 const char kMasterCard[] = "masterCardCC";
 const char kMirCard[] = "mirCC";
 const char kUnionPay[] = "unionPayCC";
 const char kVisaCard[] = "visaCC";
 
 }  // namespace autofill