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Viewing file:     isViablePhoneNumber.js (4.72 KB)      -rw-r--r--

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports["default"] = isViablePhoneNumber;
exports.isViablePhoneNumberStart = isViablePhoneNumberStart;
exports.VALID_PHONE_NUMBER_WITH_EXTENSION = exports.VALID_PHONE_NUMBER = void 0;

var _constants = require("../constants");

var _createExtensionPattern = _interopRequireDefault(require("./extension/createExtensionPattern"));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }

//  Regular expression of viable phone numbers. This is location independent.
//  Checks we have at least three leading digits, and only valid punctuation,
//  alpha characters and digits in the phone number. Does not include extension
//  data. The symbol 'x' is allowed here as valid punctuation since it is often
//  used as a placeholder for carrier codes, for example in Brazilian phone
//  numbers. We also allow multiple '+' characters at the start.
//
//  Corresponds to the following:
//  [digits]{minLengthNsn}|
//  plus_sign*
//  (([punctuation]|[star])*[digits]){3,}([punctuation]|[star]|[digits]|[alpha])*
//
//  The first reg-ex is to allow short numbers (two digits long) to be parsed if
//  they are entered as "15" etc, but only if there is no punctuation in them.
//  The second expression restricts the number of digits to three or more, but
//  then allows them to be in international form, and to have alpha-characters
//  and punctuation. We split up the two reg-exes here and combine them when
//  creating the reg-ex VALID_PHONE_NUMBER_PATTERN itself so we can prefix it
//  with ^ and append $ to each branch.
//
//  "Note VALID_PUNCTUATION starts with a -,
//   so must be the first in the range" (c) Google devs.
//  (wtf did they mean by saying that; probably nothing)
//
var MIN_LENGTH_PHONE_NUMBER_PATTERN = '[' + _constants.VALID_DIGITS + ']{' + _constants.MIN_LENGTH_FOR_NSN + '}'; //
// And this is the second reg-exp:
// (see MIN_LENGTH_PHONE_NUMBER_PATTERN for a full description of this reg-exp)
//

var VALID_PHONE_NUMBER = '[' + _constants.PLUS_CHARS + ']{0,1}' + '(?:' + '[' + _constants.VALID_PUNCTUATION + ']*' + '[' + _constants.VALID_DIGITS + ']' + '){3,}' + '[' + _constants.VALID_PUNCTUATION + _constants.VALID_DIGITS + ']*'; // This regular expression isn't present in Google's `libphonenumber`
// and is only used to determine whether the phone number being input
// is too short for it to even consider it a "valid" number.
// This is just a way to differentiate between a really invalid phone
// number like "abcde" and a valid phone number that a user has just
// started inputting, like "+1" or "1": both these cases would be
// considered `NOT_A_NUMBER` by Google's `libphonenumber`, but this
// library can provide a more detailed error message — whether it's
// really "not a number", or is it just a start of a valid phone number.

exports.VALID_PHONE_NUMBER = VALID_PHONE_NUMBER;
var VALID_PHONE_NUMBER_START_REG_EXP = new RegExp('^' + '[' + _constants.PLUS_CHARS + ']{0,1}' + '(?:' + '[' + _constants.VALID_PUNCTUATION + ']*' + '[' + _constants.VALID_DIGITS + ']' + '){1,2}' + '$', 'i');
var VALID_PHONE_NUMBER_WITH_EXTENSION = VALID_PHONE_NUMBER + // Phone number extensions
'(?:' + (0, _createExtensionPattern["default"])() + ')?'; // The combined regular expression for valid phone numbers:
//

exports.VALID_PHONE_NUMBER_WITH_EXTENSION = VALID_PHONE_NUMBER_WITH_EXTENSION;
var VALID_PHONE_NUMBER_PATTERN = new RegExp( // Either a short two-digit-only phone number
'^' + MIN_LENGTH_PHONE_NUMBER_PATTERN + '$' + '|' + // Or a longer fully parsed phone number (min 3 characters)
'^' + VALID_PHONE_NUMBER_WITH_EXTENSION + '$', 'i'); // Checks to see if the string of characters could possibly be a phone number at
// all. At the moment, checks to see that the string begins with at least 2
// digits, ignoring any punctuation commonly found in phone numbers. This method
// does not require the number to be normalized in advance - but does assume
// that leading non-number symbols have been removed, such as by the method
// `extract_possible_number`.
//

function isViablePhoneNumber(number) {
  return number.length >= _constants.MIN_LENGTH_FOR_NSN && VALID_PHONE_NUMBER_PATTERN.test(number);
} // This is just a way to differentiate between a really invalid phone
// number like "abcde" and a valid phone number that a user has just
// started inputting, like "+1" or "1": both these cases would be
// considered `NOT_A_NUMBER` by Google's `libphonenumber`, but this
// library can provide a more detailed error message — whether it's
// really "not a number", or is it just a start of a valid phone number.


function isViablePhoneNumberStart(number) {
  return VALID_PHONE_NUMBER_START_REG_EXP.test(number);
}
//# sourceMappingURL=isViablePhoneNumber.js.map