src/components/autofill/core/browser/phone_number_i18n.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/phone_number_i18n.h"
   6
   7 #include "base/basictypes.h"
   8 #include "base/logging.h"
   9 #include "base/strings/string_number_conversions.h"
  10 #include "base/strings/string_util.h"
  11 #include "base/strings/stringprintf.h"
  12 #include "base/strings/utf_string_conversions.h"
  13 #include "components/autofill/core/browser/autofill_country.h"
  14 #include "third_party/libphonenumber/src/phonenumber_api.h"
  15
  16 using i18n::phonenumbers::PhoneNumber;
  17 using i18n::phonenumbers::PhoneNumberUtil;
  18
  19 namespace autofill {
  20
  21 namespace {
  22
  23 std::string SanitizeRegion(const std::string& region,
  24                            const std::string& app_locale) {
  25   if (region.length() == 2)
  26     return region;
  27
  28   return AutofillCountry::CountryCodeForLocale(app_locale);
  29 }
  30
  31 // Returns true if |phone_number| is valid.
  32 bool IsValidPhoneNumber(const PhoneNumber& phone_number) {
  33   PhoneNumberUtil* phone_util = PhoneNumberUtil::GetInstance();
  34   if (!phone_util->IsPossibleNumber(phone_number))
  35     return false;
  36
  37   // Verify that the number has a valid area code (that in some cases could be
  38   // empty) for the parsed country code.  Also verify that this is a valid
  39   // number (for example, in the US 1234567 is not valid, because numbers do not
  40   // start with 1).
  41   if (!phone_util->IsValidNumber(phone_number))
  42     return false;
  43
  44   return true;
  45 }
  46
  47 // Formats the given |number| as a human-readable string, and writes the result
  48 // into |formatted_number|.  Also, normalizes the formatted number, and writes
  49 // that result into |normalized_number|.  This function should only be called
  50 // with numbers already known to be valid, i.e. validation should be done prior
  51 // to calling this function.  Note that the |country_code|, which determines
  52 // whether to format in the national or in the international format, is passed
  53 // in explicitly, as |number| might have an implicit country code set, even
  54 // though the original input lacked a country code.
  55 void FormatValidatedNumber(const PhoneNumber& number,
  56                            const base::string16& country_code,
  57                            base::string16* formatted_number,
  58                            base::string16* normalized_number) {
  59   PhoneNumberUtil::PhoneNumberFormat format =
  60       country_code.empty() ?
  61       PhoneNumberUtil::NATIONAL :
  62       PhoneNumberUtil::INTERNATIONAL;
  63
  64   PhoneNumberUtil* phone_util = PhoneNumberUtil::GetInstance();
  65   std::string processed_number;
  66   phone_util->Format(number, format, &processed_number);
  67
  68   if (formatted_number)
  69     *formatted_number = UTF8ToUTF16(processed_number);
  70
  71   if (normalized_number) {
  72     phone_util->NormalizeDigitsOnly(&processed_number);
  73     *normalized_number = UTF8ToUTF16(processed_number);
  74   }
  75 }
  76
  77 }  // namespace
  78
  79 namespace i18n {
  80
  81 // Parses the number stored in |value| as it should be interpreted in the given
  82 // |region|, and stores the results into the remaining arguments.  The |region|
  83 // should be sanitized prior to calling this function.
  84 bool ParsePhoneNumber(const base::string16& value,
  85                       const std::string& region,
  86                       base::string16* country_code,
  87                       base::string16* city_code,
  88                       base::string16* number,
  89                       PhoneNumber* i18n_number) {
  90   country_code->clear();
  91   city_code->clear();
  92   number->clear();
  93   *i18n_number = PhoneNumber();
  94
  95   std::string number_text(UTF16ToUTF8(value));
  96
  97   // Parse phone number based on the region.
  98   PhoneNumberUtil* phone_util = PhoneNumberUtil::GetInstance();
  99
 100   // The |region| should already be sanitized.
 101   DCHECK_EQ(2U, region.size());
 102   if (phone_util->Parse(number_text, region.c_str(), i18n_number) !=
 103           PhoneNumberUtil::NO_PARSING_ERROR) {
 104     return false;
 105   }
 106
 107   if (!IsValidPhoneNumber(*i18n_number))
 108     return false;
 109
 110   std::string national_significant_number;
 111   phone_util->GetNationalSignificantNumber(*i18n_number,
 112                                            &national_significant_number);
 113
 114   int area_length = phone_util->GetLengthOfGeographicalAreaCode(*i18n_number);
 115   int destination_length =
 116       phone_util->GetLengthOfNationalDestinationCode(*i18n_number);
 117   // Some phones have a destination code in lieu of area code: mobile operators
 118   // in Europe, toll and toll-free numbers in USA, etc. From our point of view
 119   // these two types of codes are the same.
 120   if (destination_length > area_length)
 121     area_length = destination_length;
 122
 123   std::string area_code;
 124   std::string subscriber_number;
 125   if (area_length > 0) {
 126     area_code = national_significant_number.substr(0, area_length);
 127     subscriber_number = national_significant_number.substr(area_length);
 128   } else {
 129     subscriber_number = national_significant_number;
 130   }
 131   *number = UTF8ToUTF16(subscriber_number);
 132   *city_code = UTF8ToUTF16(area_code);
 133   *country_code = base::string16();
 134
 135   phone_util->NormalizeDigitsOnly(&number_text);
 136   base::string16 normalized_number(UTF8ToUTF16(number_text));
 137
 138   // Check if parsed number has a country code that was not inferred from the
 139   // region.
 140   if (i18n_number->has_country_code()) {
 141     *country_code = UTF8ToUTF16(
 142         base::StringPrintf("%d", i18n_number->country_code()));
 143     if (normalized_number.length() <= national_significant_number.length() &&
 144         !StartsWith(normalized_number, *country_code,
 145                     true /* case_sensitive */)) {
 146       country_code->clear();
 147     }
 148   }
 149
 150   return true;
 151 }
 152
 153 base::string16 NormalizePhoneNumber(const base::string16& value,
 154                                     const std::string& region) {
 155   DCHECK_EQ(2u, region.size());
 156   base::string16 country_code;
 157   base::string16 unused_city_code;
 158   base::string16 unused_number;
 159   PhoneNumber phone_number;
 160   if (!ParsePhoneNumber(value, region, &country_code, &unused_city_code,
 161                         &unused_number, &phone_number)) {
 162     return base::string16();  // Parsing failed - do not store phone.
 163   }
 164
 165   base::string16 normalized_number;
 166   FormatValidatedNumber(phone_number, country_code, NULL, &normalized_number);
 167   return normalized_number;
 168 }
 169
 170 bool ConstructPhoneNumber(const base::string16& country_code,
 171                           const base::string16& city_code,
 172                           const base::string16& number,
 173                           const std::string& region,
 174                           base::string16* whole_number) {
 175   DCHECK_EQ(2u, region.size());
 176   whole_number->clear();
 177
 178   base::string16 unused_country_code;
 179   base::string16 unused_city_code;
 180   base::string16 unused_number;
 181   PhoneNumber phone_number;
 182   if (!ParsePhoneNumber(country_code + city_code + number, region,
 183                         &unused_country_code, &unused_city_code, &unused_number,
 184                         &phone_number)) {
 185     return false;
 186   }
 187
 188   FormatValidatedNumber(phone_number, country_code, whole_number, NULL);
 189   return true;
 190 }
 191
 192 bool PhoneNumbersMatch(const base::string16& number_a,
 193                        const base::string16& number_b,
 194                        const std::string& raw_region,
 195                        const std::string& app_locale) {
 196   // Sanitize the provided |raw_region| before trying to use it for parsing.
 197   const std::string region = SanitizeRegion(raw_region, app_locale);
 198
 199   PhoneNumberUtil* phone_util = PhoneNumberUtil::GetInstance();
 200
 201   // Parse phone numbers based on the region
 202   PhoneNumber i18n_number1;
 203   if (phone_util->Parse(UTF16ToUTF8(number_a), region.c_str(), &i18n_number1) !=
 204           PhoneNumberUtil::NO_PARSING_ERROR) {
 205     return false;
 206   }
 207
 208   PhoneNumber i18n_number2;
 209   if (phone_util->Parse(UTF16ToUTF8(number_b), region.c_str(), &i18n_number2) !=
 210           PhoneNumberUtil::NO_PARSING_ERROR) {
 211     return false;
 212   }
 213
 214   switch (phone_util->IsNumberMatch(i18n_number1, i18n_number2)) {
 215     case PhoneNumberUtil::INVALID_NUMBER:
 216     case PhoneNumberUtil::NO_MATCH:
 217       return false;
 218     case PhoneNumberUtil::SHORT_NSN_MATCH:
 219       return false;
 220     case PhoneNumberUtil::NSN_MATCH:
 221     case PhoneNumberUtil::EXACT_MATCH:
 222       return true;
 223   }
 224
 225   NOTREACHED();
 226   return false;
 227 }
 228
 229 PhoneObject::PhoneObject(const base::string16& number,
 230                          const std::string& region)
 231     : region_(region) {
 232   DCHECK_EQ(2u, region.size());
 233   // TODO(isherman): Autofill profiles should always have a |region| set, but in
 234   // some cases it should be marked as implicit.  Otherwise, phone numbers
 235   // might behave differently when they are synced across computers:
 236   // [ http://crbug.com/100845 ].  Once the bug is fixed, add a DCHECK here to
 237   // verify.
 238
 239   scoped_ptr<PhoneNumber> i18n_number(new PhoneNumber);
 240   if (ParsePhoneNumber(number, region_, &country_code_, &city_code_, &number_,
 241                        i18n_number.get())) {
 242     // The phone number was successfully parsed, so store the parsed version.
 243     // The formatted and normalized versions will be set on the first call to
 244     // the coresponding methods.
 245     i18n_number_.reset(i18n_number.release());
 246   } else {
 247     // Parsing failed. Store passed phone "as is" into |whole_number_|.
 248     whole_number_ = number;
 249   }
 250 }
 251
 252 PhoneObject::PhoneObject(const PhoneObject& other) { *this = other; }
 253
 254 PhoneObject::PhoneObject() {}
 255
 256 PhoneObject::~PhoneObject() {}
 257
 258 const base::string16& PhoneObject::GetFormattedNumber() const {
 259   if (i18n_number_ && formatted_number_.empty()) {
 260     FormatValidatedNumber(*i18n_number_, country_code_, &formatted_number_,
 261                           &whole_number_);
 262   }
 263
 264   return formatted_number_;
 265 }
 266
 267 base::string16 PhoneObject::GetNationallyFormattedNumber() const {
 268   base::string16 formatted = whole_number_;
 269   if (i18n_number_)
 270     FormatValidatedNumber(*i18n_number_, base::string16(), &formatted, NULL);
 271
 272   return formatted;
 273 }
 274
 275 const base::string16& PhoneObject::GetWholeNumber() const {
 276   if (i18n_number_ && whole_number_.empty()) {
 277     FormatValidatedNumber(*i18n_number_, country_code_, &formatted_number_,
 278                           &whole_number_);
 279   }
 280
 281   return whole_number_;
 282 }
 283
 284 PhoneObject& PhoneObject::operator=(const PhoneObject& other) {
 285   if (this == &other)
 286     return *this;
 287
 288   region_ = other.region_;
 289
 290   if (other.i18n_number_.get())
 291     i18n_number_.reset(new PhoneNumber(*other.i18n_number_));
 292   else
 293     i18n_number_.reset();
 294
 295   country_code_ = other.country_code_;
 296   city_code_ = other.city_code_;
 297   number_ = other.number_;
 298
 299   formatted_number_ = other.formatted_number_;
 300   whole_number_ = other.whole_number_;
 301
 302   return *this;
 303 }
 304
 305 }  // namespace i18n
 306 }  // namespace autofill