libphonenumber-js/es6/helpers/getCountryByCallingCode.js

A simpler (and smaller) rewrite of Google Android's libphonenumber library in javascript

import Metadata from '../metadata';
import getNumberType from './getNumberType';
var USE_NON_GEOGRAPHIC_COUNTRY_CODE = false;
export default function getCountryByCallingCode(callingCode, nationalPhoneNumber, metadata) {
  /* istanbul ignore if */
  if (USE_NON_GEOGRAPHIC_COUNTRY_CODE) {
    if (metadata.isNonGeographicCallingCode(callingCode)) {
      return '001';
    }
  } // Is always non-empty, because `callingCode` is always valid


  var possibleCountries = metadata.getCountryCodesForCallingCode(callingCode);

  if (!possibleCountries) {
    return;
  } // If there's just one country corresponding to the country code,
  // then just return it, without further phone number digits validation.


  if (possibleCountries.length === 1) {
    return possibleCountries[0];
  }

  return selectCountryFromList(possibleCountries, nationalPhoneNumber, metadata.metadata);
}

function selectCountryFromList(possibleCountries, nationalPhoneNumber, metadata) {
  // Re-create `metadata` because it will be selecting a `country`.
  metadata = new Metadata(metadata);

  for (var _iterator = possibleCountries, _isArray = Array.isArray(_iterator), _i = 0, _iterator = _isArray ? _iterator : _iterator[Symbol.iterator]();;) {
    var _ref;

    if (_isArray) {
      if (_i >= _iterator.length) break;
      _ref = _iterator[_i++];
    } else {
      _i = _iterator.next();
      if (_i.done) break;
      _ref = _i.value;
    }

    var country = _ref;
    metadata.country(country); // Leading digits check would be the simplest one

    if (metadata.leadingDigits()) {
      if (nationalPhoneNumber && nationalPhoneNumber.search(metadata.leadingDigits()) === 0) {
        return country;
      }
    } // Else perform full validation with all of those
    // fixed-line/mobile/etc regular expressions.
    else if (getNumberType({
        phone: nationalPhoneNumber,
        country: country
      }, undefined, metadata.metadata)) {
        return country;
      }
  }
}
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