components/autofill/core/browser/credit_card.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "components/autofill/core/browser/credit_card.h"
   6
   7 #include <stddef.h>
   8
   9 #include <algorithm>
  10 #include <ostream>
  11 #include <string>
  12
  13 #include "base/basictypes.h"
  14 #include "base/guid.h"
  15 #include "base/logging.h"
  16 #include "base/strings/string16.h"
  17 #include "base/strings/string_number_conversions.h"
  18 #include "base/strings/string_split.h"
  19 #include "base/strings/string_util.h"
  20 #include "base/strings/utf_string_conversions.h"
  21 #include "base/time/time.h"
  22 #include "components/autofill/core/browser/autofill_field.h"
  23 #include "components/autofill/core/browser/autofill_type.h"
  24 #include "components/autofill/core/browser/validation.h"
  25 #include "components/autofill/core/common/autofill_l10n_util.h"
  26 #include "components/autofill/core/common/autofill_regexes.h"
  27 #include "components/autofill/core/common/form_field_data.h"
  28 #include "grit/components_scaled_resources.h"
  29 #include "grit/components_strings.h"
  30 #include "third_party/icu/source/common/unicode/uloc.h"
  31 #include "third_party/icu/source/i18n/unicode/dtfmtsym.h"
  32 #include "ui/base/l10n/l10n_util.h"
  33
  34 namespace autofill {
  35
  36 namespace {
  37
  38 const base::char16 kCreditCardObfuscationSymbol = '*';
  39
  40 bool ConvertYear(const base::string16& year, int* num) {
  41   // If the |year| is empty, clear the stored value.
  42   if (year.empty()) {
  43     *num = 0;
  44     return true;
  45   }
  46
  47   // Try parsing the |year| as a number.
  48   if (base::StringToInt(year, num))
  49     return true;
  50
  51   *num = 0;
  52   return false;
  53 }
  54
  55 base::string16 TypeForFill(const std::string& type) {
  56   if (type == kAmericanExpressCard)
  57     return l10n_util::GetStringUTF16(IDS_AUTOFILL_CC_AMEX);
  58   if (type == kDinersCard)
  59     return l10n_util::GetStringUTF16(IDS_AUTOFILL_CC_DINERS);
  60   if (type == kDiscoverCard)
  61     return l10n_util::GetStringUTF16(IDS_AUTOFILL_CC_DISCOVER);
  62   if (type == kJCBCard)
  63     return l10n_util::GetStringUTF16(IDS_AUTOFILL_CC_JCB);
  64   if (type == kMasterCard)
  65     return l10n_util::GetStringUTF16(IDS_AUTOFILL_CC_MASTERCARD);
  66   if (type == kUnionPay)
  67     return l10n_util::GetStringUTF16(IDS_AUTOFILL_CC_UNION_PAY);
  68   if (type == kVisaCard)
  69     return l10n_util::GetStringUTF16(IDS_AUTOFILL_CC_VISA);
  70
  71   // If you hit this DCHECK, the above list of cases needs to be updated to
  72   // include a new card.
  73   DCHECK_EQ(kGenericCard, type);
  74   return base::string16();
  75 }
  76
  77 }  // namespace
  78
  79 CreditCard::CreditCard(const std::string& guid, const std::string& origin)
  80     : AutofillDataModel(guid, origin),
  81       record_type_(LOCAL_CARD),
  82       type_(kGenericCard),
  83       expiration_month_(0),
  84       expiration_year_(0),
  85       server_status_(OK) {
  86 }
  87
  88 CreditCard::CreditCard(const base::string16& card_number,
  89                        int expiration_month,
  90                        int expiration_year)
  91     : AutofillDataModel(std::string(), std::string()),
  92       record_type_(LOCAL_CARD),
  93       server_status_(OK) {
  94   SetNumber(card_number);
  95   SetExpirationMonth(expiration_month);
  96   SetExpirationYear(expiration_year);
  97 }
  98
  99 CreditCard::CreditCard(RecordType type, const std::string& server_id)
 100     : AutofillDataModel(base::GenerateGUID(), std::string()),
 101       record_type_(type),
 102       type_(kGenericCard),
 103       expiration_month_(0),
 104       expiration_year_(0),
 105       server_id_(server_id),
 106       server_status_(OK) {
 107   DCHECK(type == MASKED_SERVER_CARD || type == FULL_SERVER_CARD);
 108 }
 109
 110 CreditCard::CreditCard()
 111     : AutofillDataModel(base::GenerateGUID(), std::string()),
 112       record_type_(LOCAL_CARD),
 113       type_(kGenericCard),
 114       expiration_month_(0),
 115       expiration_year_(0),
 116       server_status_(OK) {
 117 }
 118
 119 CreditCard::CreditCard(const CreditCard& credit_card)
 120     : AutofillDataModel(std::string(), std::string()) {
 121   operator=(credit_card);
 122 }
 123
 124 CreditCard::~CreditCard() {}
 125
 126 // static
 127 const base::string16 CreditCard::StripSeparators(const base::string16& number) {
 128   base::string16 stripped;
 129   base::RemoveChars(number, base::ASCIIToUTF16("- "), &stripped);
 130   return stripped;
 131 }
 132
 133 // static
 134 base::string16 CreditCard::TypeForDisplay(const std::string& type) {
 135   if (kGenericCard == type)
 136     return l10n_util::GetStringUTF16(IDS_AUTOFILL_CC_GENERIC);
 137   if (kAmericanExpressCard == type)
 138     return l10n_util::GetStringUTF16(IDS_AUTOFILL_CC_AMEX_SHORT);
 139
 140   return ::autofill::TypeForFill(type);
 141 }
 142
 143 // This method is not compiled on iOS because the resources are not used and
 144 // should not be shipped.
 145 #if !defined(OS_IOS)
 146 // static
 147 int CreditCard::IconResourceId(const std::string& type) {
 148   if (type == kAmericanExpressCard)
 149     return IDR_AUTOFILL_CC_AMEX;
 150   if (type == kDinersCard)
 151     return IDR_AUTOFILL_CC_GENERIC;
 152   if (type == kDiscoverCard)
 153     return IDR_AUTOFILL_CC_DISCOVER;
 154   if (type == kJCBCard)
 155     return IDR_AUTOFILL_CC_GENERIC;
 156   if (type == kMasterCard)
 157     return IDR_AUTOFILL_CC_MASTERCARD;
 158   if (type == kUnionPay)
 159     return IDR_AUTOFILL_CC_GENERIC;
 160   if (type == kVisaCard)
 161     return IDR_AUTOFILL_CC_VISA;
 162
 163   // If you hit this DCHECK, the above list of cases needs to be updated to
 164   // include a new card.
 165   DCHECK_EQ(kGenericCard, type);
 166   return IDR_AUTOFILL_CC_GENERIC;
 167 }
 168 #endif  // #if !defined(OS_IOS)
 169
 170 // static
 171 const char* CreditCard::GetCreditCardType(const base::string16& number) {
 172   // Credit card number specifications taken from:
 173   // http://en.wikipedia.org/wiki/Credit_card_numbers,
 174   // http://en.wikipedia.org/wiki/List_of_Issuer_Identification_Numbers,
 175   // http://www.discovernetwork.com/merchants/images/Merchant_Marketing_PDF.pdf,
 176   // http://www.regular-expressions.info/creditcard.html,
 177   // http://developer.ean.com/general_info/Valid_Credit_Card_Types,
 178   // http://www.bincodes.com/,
 179   // http://www.fraudpractice.com/FL-binCC.html, and
 180   // http://www.beachnet.com/~hstiles/cardtype.html
 181   //
 182   // The last site is currently unavailable, but a cached version remains at
 183   // http://web.archive.org/web/20120923111349/http://www.beachnet.com/~hstiles/cardtype.html
 184   //
 185   // Card Type              Prefix(es)                      Length
 186   // ---------------------------------------------------------------
 187   // Visa                   4                               13,16
 188   // American Express       34,37                           15
 189   // Diners Club            300-305,3095,36,38-39           14
 190   // Discover Card          6011,644-649,65                 16
 191   // JCB                    3528-3589                       16
 192   // MasterCard             51-55                           16
 193   // UnionPay               62                              16-19
 194
 195   // Check for prefixes of length 1.
 196   if (number.empty())
 197     return kGenericCard;
 198
 199   if (number[0] == '4')
 200     return kVisaCard;
 201
 202   // Check for prefixes of length 2.
 203   if (number.size() < 2)
 204     return kGenericCard;
 205
 206   int first_two_digits = 0;
 207   if (!base::StringToInt(number.substr(0, 2), &first_two_digits))
 208     return kGenericCard;
 209
 210   if (first_two_digits == 34 || first_two_digits == 37)
 211     return kAmericanExpressCard;
 212
 213   if (first_two_digits == 36 ||
 214       first_two_digits == 38 ||
 215       first_two_digits == 39)
 216     return kDinersCard;
 217
 218   if (first_two_digits >= 51 && first_two_digits <= 55)
 219     return kMasterCard;
 220
 221   if (first_two_digits == 62)
 222     return kUnionPay;
 223
 224   if (first_two_digits == 65)
 225     return kDiscoverCard;
 226
 227   // Check for prefixes of length 3.
 228   if (number.size() < 3)
 229     return kGenericCard;
 230
 231   int first_three_digits = 0;
 232   if (!base::StringToInt(number.substr(0, 3), &first_three_digits))
 233     return kGenericCard;
 234
 235   if (first_three_digits >= 300 && first_three_digits <= 305)
 236     return kDinersCard;
 237
 238   if (first_three_digits >= 644 && first_three_digits <= 649)
 239     return kDiscoverCard;
 240
 241   // Check for prefixes of length 4.
 242   if (number.size() < 4)
 243     return kGenericCard;
 244
 245   int first_four_digits = 0;
 246   if (!base::StringToInt(number.substr(0, 4), &first_four_digits))
 247     return kGenericCard;
 248
 249   if (first_four_digits == 3095)
 250     return kDinersCard;
 251
 252   if (first_four_digits >= 3528 && first_four_digits <= 3589)
 253     return kJCBCard;
 254
 255   if (first_four_digits == 6011)
 256     return kDiscoverCard;
 257
 258   return kGenericCard;
 259 }
 260
 261 void CreditCard::SetTypeForMaskedCard(const char* type) {
 262   DCHECK_EQ(MASKED_SERVER_CARD, record_type());
 263   type_ = type;
 264 }
 265
 266 void CreditCard::SetServerStatus(ServerStatus status) {
 267   DCHECK_NE(LOCAL_CARD, record_type());
 268   server_status_ = status;
 269 }
 270
 271 CreditCard::ServerStatus CreditCard::GetServerStatus() const {
 272   DCHECK_NE(LOCAL_CARD, record_type());
 273   return server_status_;
 274 }
 275
 276 base::string16 CreditCard::GetRawInfo(ServerFieldType type) const {
 277   DCHECK_EQ(CREDIT_CARD, AutofillType(type).group());
 278   switch (type) {
 279     case CREDIT_CARD_NAME:
 280       return name_on_card_;
 281
 282     case CREDIT_CARD_EXP_MONTH:
 283       return ExpirationMonthAsString();
 284
 285     case CREDIT_CARD_EXP_2_DIGIT_YEAR:
 286       return Expiration2DigitYearAsString();
 287
 288     case CREDIT_CARD_EXP_4_DIGIT_YEAR:
 289       return Expiration4DigitYearAsString();
 290
 291     case CREDIT_CARD_EXP_DATE_2_DIGIT_YEAR: {
 292       base::string16 month = ExpirationMonthAsString();
 293       base::string16 year = Expiration2DigitYearAsString();
 294       if (!month.empty() && !year.empty())
 295         return month + base::ASCIIToUTF16("/") + year;
 296       return base::string16();
 297     }
 298
 299     case CREDIT_CARD_EXP_DATE_4_DIGIT_YEAR: {
 300       base::string16 month = ExpirationMonthAsString();
 301       base::string16 year = Expiration4DigitYearAsString();
 302       if (!month.empty() && !year.empty())
 303         return month + base::ASCIIToUTF16("/") + year;
 304       return base::string16();
 305     }
 306
 307     case CREDIT_CARD_TYPE:
 308       return TypeForFill();
 309
 310     case CREDIT_CARD_NUMBER:
 311       return number_;
 312
 313     case CREDIT_CARD_VERIFICATION_CODE:
 314       // Chrome doesn't store credit card verification codes.
 315       return base::string16();
 316
 317     default:
 318       // ComputeDataPresentForArray will hit this repeatedly.
 319       return base::string16();
 320   }
 321 }
 322
 323 void CreditCard::SetRawInfo(ServerFieldType type,
 324                             const base::string16& value) {
 325   DCHECK_EQ(CREDIT_CARD, AutofillType(type).group());
 326   switch (type) {
 327     case CREDIT_CARD_NAME:
 328       name_on_card_ = value;
 329       break;
 330
 331     case CREDIT_CARD_EXP_MONTH:
 332       SetExpirationMonthFromString(value, std::string());
 333       break;
 334
 335     case CREDIT_CARD_EXP_2_DIGIT_YEAR:
 336       // This is a read-only attribute.
 337       break;
 338
 339     case CREDIT_CARD_EXP_4_DIGIT_YEAR:
 340       SetExpirationYearFromString(value);
 341       break;
 342
 343     case CREDIT_CARD_EXP_DATE_2_DIGIT_YEAR:
 344       // This is a read-only attribute.
 345       break;
 346
 347     case CREDIT_CARD_EXP_DATE_4_DIGIT_YEAR:
 348       // This is a read-only attribute.
 349       break;
 350
 351     case CREDIT_CARD_TYPE:
 352       // This is a read-only attribute, determined by the credit card number.
 353       break;
 354
 355     case CREDIT_CARD_NUMBER: {
 356       // Don't change the real value if the input is an obfuscated string.
 357       if (value.size() > 0 && value[0] != kCreditCardObfuscationSymbol)
 358         SetNumber(value);
 359       break;
 360     }
 361
 362     case CREDIT_CARD_VERIFICATION_CODE:
 363       // Chrome doesn't store the credit card verification code.
 364       break;
 365
 366     default:
 367       NOTREACHED() << "Attempting to set unknown info-type " << type;
 368       break;
 369   }
 370 }
 371
 372 base::string16 CreditCard::GetInfo(const AutofillType& type,
 373                                    const std::string& app_locale) const {
 374   ServerFieldType storable_type = type.GetStorableType();
 375   if (storable_type == CREDIT_CARD_NUMBER) {
 376     // Web pages should never actually be filled by a masked server card,
 377     // but this function is used at the preview stage.
 378     if (record_type() == MASKED_SERVER_CARD)
 379       return TypeAndLastFourDigits();
 380
 381     return StripSeparators(number_);
 382   }
 383
 384   return GetRawInfo(storable_type);
 385 }
 386
 387 bool CreditCard::SetInfo(const AutofillType& type,
 388                          const base::string16& value,
 389                          const std::string& app_locale) {
 390   ServerFieldType storable_type = type.GetStorableType();
 391   if (storable_type == CREDIT_CARD_NUMBER)
 392     SetRawInfo(storable_type, StripSeparators(value));
 393   else if (storable_type == CREDIT_CARD_EXP_MONTH)
 394     SetExpirationMonthFromString(value, app_locale);
 395   else
 396     SetRawInfo(storable_type, value);
 397
 398   return true;
 399 }
 400
 401 void CreditCard::GetMatchingTypes(const base::string16& text,
 402                                   const std::string& app_locale,
 403                                   ServerFieldTypeSet* matching_types) const {
 404   FormGroup::GetMatchingTypes(text, app_locale, matching_types);
 405
 406   base::string16 card_number =
 407       GetInfo(AutofillType(CREDIT_CARD_NUMBER), app_locale);
 408   if (!card_number.empty() && StripSeparators(text) == card_number)
 409     matching_types->insert(CREDIT_CARD_NUMBER);
 410
 411   int month;
 412   if (ConvertMonth(text, app_locale, &month) &&
 413       month == expiration_month_) {
 414     matching_types->insert(CREDIT_CARD_EXP_MONTH);
 415   }
 416 }
 417
 418 const base::string16 CreditCard::Label() const {
 419   std::pair<base::string16, base::string16> pieces = LabelPieces();
 420   return pieces.first + pieces.second;
 421 }
 422
 423 const std::pair<base::string16, base::string16> CreditCard::LabelPieces()
 424     const {
 425   base::string16 label;
 426   // No CC number, return name only.
 427   if (number().empty())
 428     return std::make_pair(name_on_card_, base::string16());
 429
 430   base::string16 obfuscated_cc_number = TypeAndLastFourDigits();
 431   // No expiration date set.
 432   if (!expiration_month_ || !expiration_year_)
 433     return std::make_pair(obfuscated_cc_number, base::string16());
 434
 435   base::string16 formatted_date(ExpirationMonthAsString());
 436   formatted_date.append(base::ASCIIToUTF16("/"));
 437   formatted_date.append(Expiration4DigitYearAsString());
 438
 439   base::string16 separator =
 440       l10n_util::GetStringUTF16(IDS_AUTOFILL_ADDRESS_SUMMARY_SEPARATOR);
 441   return std::make_pair(obfuscated_cc_number, separator + formatted_date);
 442 }
 443
 444 void CreditCard::SetInfoForMonthInputType(const base::string16& value) {
 445   // Check if |text| is "yyyy-mm" format first, and check normal month format.
 446   if (!autofill::MatchesPattern(value,
 447                                 base::UTF8ToUTF16("^[0-9]{4}-[0-9]{1,2}$"))) {
 448     return;
 449   }
 450
 451   std::vector<base::string16> year_month;
 452   base::SplitString(value, L'-', &year_month);
 453   DCHECK_EQ((int)year_month.size(), 2);
 454   int num = 0;
 455   bool converted = false;
 456   converted = base::StringToInt(year_month[0], &num);
 457   DCHECK(converted);
 458   SetExpirationYear(num);
 459   converted = base::StringToInt(year_month[1], &num);
 460   DCHECK(converted);
 461   SetExpirationMonth(num);
 462 }
 463
 464 void CreditCard::SetExpirationMonth(int expiration_month) {
 465   if (expiration_month < 0 || expiration_month > 12)
 466     return;
 467   expiration_month_ = expiration_month;
 468 }
 469
 470 void CreditCard::SetExpirationYear(int expiration_year) {
 471   if (expiration_year != 0 &&
 472       (expiration_year < 2006 || expiration_year > 10000))
 473     return;
 474   expiration_year_ = expiration_year;
 475 }
 476
 477 base::string16 CreditCard::LastFourDigits() const {
 478   static const size_t kNumLastDigits = 4;
 479
 480   base::string16 number = StripSeparators(number_);
 481   if (number.size() <= kNumLastDigits)
 482     return number;
 483
 484   return number.substr(number.size() - kNumLastDigits, kNumLastDigits);
 485 }
 486
 487 base::string16 CreditCard::TypeForDisplay() const {
 488   return CreditCard::TypeForDisplay(type_);
 489 }
 490
 491 base::string16 CreditCard::TypeAndLastFourDigits() const {
 492   base::string16 type = TypeForDisplay();
 493
 494   base::string16 digits = LastFourDigits();
 495   if (digits.empty())
 496     return type;
 497
 498   // The separator character is a non breaking space and a horizontal midline
 499   // ellipsis.
 500   // TODO(estade): i18n?
 501   return type + base::UTF8ToUTF16("\xC2\xA0\xE2\x8B\xAF") + digits;
 502 }
 503
 504 void CreditCard::operator=(const CreditCard& credit_card) {
 505   set_use_count(credit_card.use_count());
 506   set_use_date(credit_card.use_date());
 507   set_modification_date(credit_card.modification_date());
 508
 509   if (this == &credit_card)
 510     return;
 511
 512   record_type_ = credit_card.record_type_;
 513   number_ = credit_card.number_;
 514   name_on_card_ = credit_card.name_on_card_;
 515   type_ = credit_card.type_;
 516   expiration_month_ = credit_card.expiration_month_;
 517   expiration_year_ = credit_card.expiration_year_;
 518   server_id_ = credit_card.server_id_;
 519   server_status_ = credit_card.server_status_;
 520
 521   set_guid(credit_card.guid());
 522   set_origin(credit_card.origin());
 523 }
 524
 525 bool CreditCard::UpdateFromImportedCard(const CreditCard& imported_card,
 526                                         const std::string& app_locale) {
 527   if (this->GetInfo(AutofillType(CREDIT_CARD_NUMBER), app_locale) !=
 528           imported_card.GetInfo(AutofillType(CREDIT_CARD_NUMBER), app_locale)) {
 529     return false;
 530   }
 531
 532   // Heuristically aggregated data should never overwrite verified data.
 533   // Instead, discard any heuristically aggregated credit cards that disagree
 534   // with explicitly entered data, so that the UI is not cluttered with
 535   // duplicate cards.
 536   if (this->IsVerified() && !imported_card.IsVerified())
 537     return true;
 538
 539   set_origin(imported_card.origin());
 540
 541   // Note that the card number is intentionally not updated, so as to preserve
 542   // any formatting (i.e. separator characters).  Since the card number is not
 543   // updated, there is no reason to update the card type, either.
 544   if (!imported_card.name_on_card_.empty())
 545     name_on_card_ = imported_card.name_on_card_;
 546
 547   // The expiration date for |imported_card| should always be set.
 548   DCHECK(imported_card.expiration_month_ && imported_card.expiration_year_);
 549   expiration_month_ = imported_card.expiration_month_;
 550   expiration_year_ = imported_card.expiration_year_;
 551
 552   return true;
 553 }
 554
 555 int CreditCard::Compare(const CreditCard& credit_card) const {
 556   // The following CreditCard field types are the only types we store in the
 557   // WebDB so far, so we're only concerned with matching these types in the
 558   // credit card.
 559   const ServerFieldType types[] = { CREDIT_CARD_NAME,
 560                                     CREDIT_CARD_NUMBER,
 561                                     CREDIT_CARD_EXP_MONTH,
 562                                     CREDIT_CARD_EXP_4_DIGIT_YEAR };
 563   for (size_t i = 0; i < arraysize(types); ++i) {
 564     int comparison =
 565         GetRawInfo(types[i]).compare(credit_card.GetRawInfo(types[i]));
 566     if (comparison != 0)
 567       return comparison;
 568   }
 569
 570   int comparison = server_id_.compare(credit_card.server_id_);
 571   if (comparison != 0)
 572     return comparison;
 573
 574   if (static_cast<int>(server_status_) <
 575       static_cast<int>(credit_card.server_status_))
 576     return -1;
 577   if (static_cast<int>(server_status_) >
 578       static_cast<int>(credit_card.server_status_))
 579     return 1;
 580   if (static_cast<int>(record_type_) <
 581       static_cast<int>(credit_card.record_type_))
 582     return -1;
 583   if (static_cast<int>(record_type_) >
 584       static_cast<int>(credit_card.record_type_))
 585     return 1;
 586   return 0;
 587 }
 588
 589 bool CreditCard::IsLocalDuplicateOfServerCard(const CreditCard& other) const {
 590   if (record_type() != LOCAL_CARD || other.record_type() == LOCAL_CARD)
 591     return false;
 592
 593   // If |this| is only a partial card, i.e. some fields are missing, assume
 594   // those fields match.
 595   if ((!name_on_card_.empty() && name_on_card_ != other.name_on_card_) ||
 596       (expiration_month_ != 0 &&
 597        expiration_month_ != other.expiration_month_) ||
 598       (expiration_year_ != 0 && expiration_year_ != other.expiration_year_)) {
 599     return false;
 600   }
 601
 602   if (number_.empty())
 603     return true;
 604
 605   if (other.record_type() == FULL_SERVER_CARD)
 606     return StripSeparators(number_) == StripSeparators(other.number_);
 607
 608   // For masked cards, this is the best we can do to compare card numbers.
 609   return TypeAndLastFourDigits() == other.TypeAndLastFourDigits();
 610 }
 611
 612 bool CreditCard::operator==(const CreditCard& credit_card) const {
 613   return guid() == credit_card.guid() &&
 614          origin() == credit_card.origin() &&
 615          Compare(credit_card) == 0;
 616 }
 617
 618 bool CreditCard::operator!=(const CreditCard& credit_card) const {
 619   return !operator==(credit_card);
 620 }
 621
 622 bool CreditCard::IsEmpty(const std::string& app_locale) const {
 623   ServerFieldTypeSet types;
 624   GetNonEmptyTypes(app_locale, &types);
 625   return types.empty();
 626 }
 627
 628 bool CreditCard::IsComplete() const {
 629   return
 630       autofill::IsValidCreditCardNumber(number_) &&
 631       expiration_month_ != 0 &&
 632       expiration_year_ != 0;
 633 }
 634
 635 bool CreditCard::IsValid() const {
 636   return autofill::IsValidCreditCardNumber(number_) &&
 637          autofill::IsValidCreditCardExpirationDate(
 638              expiration_year_, expiration_month_, base::Time::Now());
 639 }
 640
 641 void CreditCard::GetSupportedTypes(ServerFieldTypeSet* supported_types) const {
 642   supported_types->insert(CREDIT_CARD_NAME);
 643   supported_types->insert(CREDIT_CARD_NUMBER);
 644   supported_types->insert(CREDIT_CARD_TYPE);
 645   supported_types->insert(CREDIT_CARD_EXP_MONTH);
 646   supported_types->insert(CREDIT_CARD_EXP_2_DIGIT_YEAR);
 647   supported_types->insert(CREDIT_CARD_EXP_4_DIGIT_YEAR);
 648   supported_types->insert(CREDIT_CARD_EXP_DATE_2_DIGIT_YEAR);
 649   supported_types->insert(CREDIT_CARD_EXP_DATE_4_DIGIT_YEAR);
 650 }
 651
 652 base::string16 CreditCard::ExpirationMonthAsString() const {
 653   if (expiration_month_ == 0)
 654     return base::string16();
 655
 656   base::string16 month = base::IntToString16(expiration_month_);
 657   if (expiration_month_ >= 10)
 658     return month;
 659
 660   base::string16 zero = base::ASCIIToUTF16("0");
 661   zero.append(month);
 662   return zero;
 663 }
 664
 665 base::string16 CreditCard::TypeForFill() const {
 666   return ::autofill::TypeForFill(type_);
 667 }
 668
 669 base::string16 CreditCard::Expiration4DigitYearAsString() const {
 670   if (expiration_year_ == 0)
 671     return base::string16();
 672
 673   return base::IntToString16(Expiration4DigitYear());
 674 }
 675
 676 base::string16 CreditCard::Expiration2DigitYearAsString() const {
 677   if (expiration_year_ == 0)
 678     return base::string16();
 679
 680   return base::IntToString16(Expiration2DigitYear());
 681 }
 682
 683 void CreditCard::SetExpirationMonthFromString(const base::string16& text,
 684                                               const std::string& app_locale) {
 685   int month = 0;
 686   if (!text.empty() && !ConvertMonth(text, app_locale, &month))
 687     return;
 688
 689   SetExpirationMonth(month);
 690 }
 691
 692 void CreditCard::SetExpirationYearFromString(const base::string16& text) {
 693   int year;
 694   if (!ConvertYear(text, &year))
 695     return;
 696
 697   SetExpirationYear(year);
 698 }
 699
 700 void CreditCard::SetNumber(const base::string16& number) {
 701   number_ = number;
 702
 703   // Set the type based on the card number, but only for full numbers, not
 704   // when we have masked cards from the server (last 4 digits).
 705   if (record_type_ != MASKED_SERVER_CARD)
 706     type_ = GetCreditCardType(StripSeparators(number_));
 707 }
 708
 709 // static
 710 bool CreditCard::ConvertMonth(const base::string16& month,
 711                               const std::string& app_locale,
 712                               int* num) {
 713   if (month.empty())
 714     return false;
 715
 716   // Try parsing the |month| as a number (this doesn't require |app_locale|).
 717   if (base::StringToInt(month, num))
 718     return true;
 719
 720   if (app_locale.empty())
 721     return false;
 722
 723   // Otherwise, try parsing the |month| as a named month, e.g. "January" or
 724   // "Jan".
 725   l10n::CaseInsensitiveCompare compare;
 726   UErrorCode status = U_ZERO_ERROR;
 727   icu::Locale locale(app_locale.c_str());
 728   icu::DateFormatSymbols date_format_symbols(locale, status);
 729   DCHECK(status == U_ZERO_ERROR || status == U_USING_FALLBACK_WARNING ||
 730          status == U_USING_DEFAULT_WARNING);
 731
 732   int32_t num_months;
 733   const icu::UnicodeString* months = date_format_symbols.getMonths(num_months);
 734   for (int32_t i = 0; i < num_months; ++i) {
 735     const base::string16 icu_month(months[i].getBuffer(), months[i].length());
 736     if (compare.StringsEqual(icu_month, month)) {
 737       *num = i + 1;  // Adjust from 0-indexed to 1-indexed.
 738       return true;
 739     }
 740   }
 741
 742   months = date_format_symbols.getShortMonths(num_months);
 743   // Some abbreviations have . at the end (e.g., "janv." in French). We don't
 744   // care about matching that.
 745   base::string16 trimmed_month;
 746   base::TrimString(month, base::ASCIIToUTF16("."), &trimmed_month);
 747   for (int32_t i = 0; i < num_months; ++i) {
 748     base::string16 icu_month(months[i].getBuffer(), months[i].length());
 749     base::TrimString(icu_month, base::ASCIIToUTF16("."), &icu_month);
 750     if (compare.StringsEqual(icu_month, trimmed_month)) {
 751       *num = i + 1;  // Adjust from 0-indexed to 1-indexed.
 752       return true;
 753     }
 754   }
 755
 756   return false;
 757 }
 758
 759 // So we can compare CreditCards with EXPECT_EQ().
 760 std::ostream& operator<<(std::ostream& os, const CreditCard& credit_card) {
 761   return os
 762       << base::UTF16ToUTF8(credit_card.Label())
 763       << " "
 764       << credit_card.guid()
 765       << " "
 766       << credit_card.origin()
 767       << " "
 768       << base::UTF16ToUTF8(credit_card.GetRawInfo(CREDIT_CARD_NAME))
 769       << " "
 770       << base::UTF16ToUTF8(credit_card.GetRawInfo(CREDIT_CARD_TYPE))
 771       << " "
 772       << base::UTF16ToUTF8(credit_card.GetRawInfo(CREDIT_CARD_NUMBER))
 773       << " "
 774       << base::UTF16ToUTF8(credit_card.GetRawInfo(CREDIT_CARD_EXP_MONTH))
 775       << " "
 776       << base::UTF16ToUTF8(
 777              credit_card.GetRawInfo(CREDIT_CARD_EXP_4_DIGIT_YEAR));
 778 }
 779
 780 // These values must match the values in WebKitPlatformSupportImpl in
 781 // webkit/glue. We send these strings to WebKit, which then asks
 782 // WebKitPlatformSupportImpl to load the image data.
 783 const char* const kAmericanExpressCard = "americanExpressCC";
 784 const char* const kDinersCard = "dinersCC";
 785 const char* const kDiscoverCard = "discoverCC";
 786 const char* const kGenericCard = "genericCC";
 787 const char* const kJCBCard = "jcbCC";
 788 const char* const kMasterCard = "masterCardCC";
 789 const char* const kUnionPay = "unionPayCC";
 790 const char* const kVisaCard = "visaCC";
 791
 792 }  // namespace autofill