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import stripIddPrefix from './stripIddPrefix.js'
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import extractCountryCallingCodeFromInternationalNumberWithoutPlusSign from './extractCountryCallingCodeFromInternationalNumberWithoutPlusSign.js'
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import Metadata from '../metadata.js'
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import { MAX_LENGTH_COUNTRY_CODE } from '../constants.js'
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/**
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* Converts a phone number digits (possibly with a `+`)
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* into a calling code and the rest phone number digits.
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* The "rest phone number digits" could include
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* a national prefix, carrier code, and national
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* (significant) number.
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* @param {string} number — Phone number digits (possibly with a `+`).
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* @param {string} [country] — Default country.
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* @param {string} [callingCode] — Default calling code (some phone numbering plans are non-geographic).
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* @param {object} metadata
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* @return {object} `{ countryCallingCode: string?, number: string }`
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* @example
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* // Returns `{ countryCallingCode: "1", number: "2133734253" }`.
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* extractCountryCallingCode('2133734253', 'US', null, metadata)
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* extractCountryCallingCode('2133734253', null, '1', metadata)
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* extractCountryCallingCode('+12133734253', null, null, metadata)
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* extractCountryCallingCode('+12133734253', 'RU', null, metadata)
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*/
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export default function extractCountryCallingCode(
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number,
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country,
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callingCode,
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metadata
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) {
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if (!number) {
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return {}
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}
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// If this is not an international phone number,
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// then either extract an "IDD" prefix, or extract a
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// country calling code from a number by autocorrecting it
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// by prepending a leading `+` in cases when it starts
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// with the country calling code.
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// https://wikitravel.org/en/International_dialling_prefix
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// https://github.com/catamphetamine/libphonenumber-js/issues/376
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if (number[0] !== '+') {
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// Convert an "out-of-country" dialing phone number
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// to a proper international phone number.
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const numberWithoutIDD = stripIddPrefix(number, country, callingCode, metadata)
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// If an IDD prefix was stripped then
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// convert the number to international one
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// for subsequent parsing.
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if (numberWithoutIDD && numberWithoutIDD !== number) {
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number = '+' + numberWithoutIDD
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} else {
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// Check to see if the number starts with the country calling code
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// for the default country. If so, we remove the country calling code,
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// and do some checks on the validity of the number before and after.
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// https://github.com/catamphetamine/libphonenumber-js/issues/376
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if (country || callingCode) {
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const {
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countryCallingCode,
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number: shorterNumber
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} = extractCountryCallingCodeFromInternationalNumberWithoutPlusSign(
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number,
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country,
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callingCode,
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metadata
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)
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if (countryCallingCode) {
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return {
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countryCallingCode,
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number: shorterNumber
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}
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}
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}
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return { number }
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}
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}
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// Fast abortion: country codes do not begin with a '0'
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if (number[1] === '0') {
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return {}
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}
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metadata = new Metadata(metadata)
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// The thing with country phone codes
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// is that they are orthogonal to each other
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// i.e. there's no such country phone code A
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// for which country phone code B exists
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// where B starts with A.
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// Therefore, while scanning digits,
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// if a valid country code is found,
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// that means that it is the country code.
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//
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let i = 2
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while (i - 1 <= MAX_LENGTH_COUNTRY_CODE && i <= number.length) {
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const countryCallingCode = number.slice(1, i)
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if (metadata.hasCallingCode(countryCallingCode)) {
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metadata.selectNumberingPlan(countryCallingCode)
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return {
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countryCallingCode,
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number: number.slice(i)
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}
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}
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i++
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}
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return {}
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} |
