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Viewing file:     extractCountryCallingCode.js (3.84 KB)      -rw-r--r--

import stripIddPrefix from './stripIddPrefix';
import extractCountryCallingCodeFromInternationalNumberWithoutPlusSign from './extractCountryCallingCodeFromInternationalNumberWithoutPlusSign';
import Metadata from '../metadata';
import { MAX_LENGTH_COUNTRY_CODE } from '../constants';
/**
 * Converts a phone number digits (possibly with a `+`)
 * into a calling code and the rest phone number digits.
 * The "rest phone number digits" could include
 * a national prefix, carrier code, and national
 * (significant) number.
 * @param  {string} number — Phone number digits (possibly with a `+`).
 * @param  {string} [country] — Default country.
 * @param  {string} [callingCode] — Default calling code (some phone numbering plans are non-geographic).
 * @param  {object} metadata
 * @return {object} `{ countryCallingCode: string?, number: string }`
 * @example
 * // Returns `{ countryCallingCode: "1", number: "2133734253" }`.
 * extractCountryCallingCode('2133734253', 'US', null, metadata)
 * extractCountryCallingCode('2133734253', null, '1', metadata)
 * extractCountryCallingCode('+12133734253', null, null, metadata)
 * extractCountryCallingCode('+12133734253', 'RU', null, metadata)
 */

export default function extractCountryCallingCode(number, country, callingCode, metadata) {
  if (!number) {
    return {};
  } // If this is not an international phone number,
  // then either extract an "IDD" prefix, or extract a
  // country calling code from a number by autocorrecting it
  // by prepending a leading `+` in cases when it starts
  // with the country calling code.
  // https://wikitravel.org/en/International_dialling_prefix
  // https://github.com/catamphetamine/libphonenumber-js/issues/376


  if (number[0] !== '+') {
    // Convert an "out-of-country" dialing phone number
    // to a proper international phone number.
    var numberWithoutIDD = stripIddPrefix(number, country, callingCode, metadata); // If an IDD prefix was stripped then
    // convert the number to international one
    // for subsequent parsing.

    if (numberWithoutIDD && numberWithoutIDD !== number) {
      number = '+' + numberWithoutIDD;
    } else {
      // Check to see if the number starts with the country calling code
      // for the default country. If so, we remove the country calling code,
      // and do some checks on the validity of the number before and after.
      // https://github.com/catamphetamine/libphonenumber-js/issues/376
      if (country || callingCode) {
        var _extractCountryCallin = extractCountryCallingCodeFromInternationalNumberWithoutPlusSign(number, country, callingCode, metadata),
            countryCallingCode = _extractCountryCallin.countryCallingCode,
            shorterNumber = _extractCountryCallin.number;

        if (countryCallingCode) {
          return {
            countryCallingCode: countryCallingCode,
            number: shorterNumber
          };
        }
      }

      return {
        number: number
      };
    }
  } // Fast abortion: country codes do not begin with a '0'


  if (number[1] === '0') {
    return {};
  }

  metadata = new Metadata(metadata); // The thing with country phone codes
  // is that they are orthogonal to each other
  // i.e. there's no such country phone code A
  // for which country phone code B exists
  // where B starts with A.
  // Therefore, while scanning digits,
  // if a valid country code is found,
  // that means that it is the country code.
  //

  var i = 2;

  while (i - 1 <= MAX_LENGTH_COUNTRY_CODE && i <= number.length) {
    var _countryCallingCode = number.slice(1, i);

    if (metadata.hasCallingCode(_countryCallingCode)) {
      metadata.selectNumberingPlan(_countryCallingCode);
      return {
        countryCallingCode: _countryCallingCode,
        number: number.slice(i)
      };
    }

    i++;
  }

  return {};
}
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