libphonenumber-js/es6/helpers/extractCountryCallingCodeFromInternationalNumberWithoutPlusSign.js

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

import Metadata from '../metadata.js';
import matchesEntirely from './matchesEntirely.js';
import extractNationalNumber from './extractNationalNumber.js';
import checkNumberLength from './checkNumberLength.js';
import getCountryCallingCode from '../getCountryCallingCode.js';
/**
 * Sometimes some people incorrectly input international phone numbers
 * without the leading `+`. This function corrects such input.
 * @param  {string} number — Phone number digits.
 * @param  {string?} country
 * @param  {string?} callingCode
 * @param  {object} metadata
 * @return {object} `{ countryCallingCode: string?, number: string }`.
 */

export default function extractCountryCallingCodeFromInternationalNumberWithoutPlusSign(number, country, callingCode, metadata) {
  var countryCallingCode = country ? getCountryCallingCode(country, metadata) : callingCode;

  if (number.indexOf(countryCallingCode) === 0) {
    metadata = new Metadata(metadata);
    metadata.selectNumberingPlan(country, callingCode);
    var possibleShorterNumber = number.slice(countryCallingCode.length);

    var _extractNationalNumbe = extractNationalNumber(possibleShorterNumber, metadata),
        possibleShorterNationalNumber = _extractNationalNumbe.nationalNumber;

    var _extractNationalNumbe2 = extractNationalNumber(number, metadata),
        nationalNumber = _extractNationalNumbe2.nationalNumber; // If the number was not valid before but is valid now,
    // or if it was too long before, we consider the number
    // with the country calling code stripped to be a better result
    // and keep that instead.
    // For example, in Germany (+49), `49` is a valid area code,
    // so if a number starts with `49`, it could be both a valid
    // national German number or an international number without
    // a leading `+`.


    if (!matchesEntirely(nationalNumber, metadata.nationalNumberPattern()) && matchesEntirely(possibleShorterNationalNumber, metadata.nationalNumberPattern()) || checkNumberLength(nationalNumber, metadata) === 'TOO_LONG') {
      return {
        countryCallingCode: countryCallingCode,
        number: possibleShorterNumber
      };
    }
  }

  return {
    number: number
  };
}
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