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47 lines
1.8 KiB
47 lines
1.8 KiB
3 years ago
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import Metadata from '../metadata.js'
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import getNumberType from './getNumberType.js'
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const USE_NON_GEOGRAPHIC_COUNTRY_CODE = false
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export default function getCountryByCallingCode(callingCode, nationalPhoneNumber, metadata) {
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/* istanbul ignore if */
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if (USE_NON_GEOGRAPHIC_COUNTRY_CODE) {
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if (metadata.isNonGeographicCallingCode(callingCode)) {
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return '001'
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}
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}
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// Is always non-empty, because `callingCode` is always valid
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const possibleCountries = metadata.getCountryCodesForCallingCode(callingCode)
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if (!possibleCountries) {
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return
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}
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// If there's just one country corresponding to the country code,
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// then just return it, without further phone number digits validation.
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if (possibleCountries.length === 1) {
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return possibleCountries[0]
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}
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return selectCountryFromList(possibleCountries, nationalPhoneNumber, metadata.metadata)
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}
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function selectCountryFromList(possibleCountries, nationalPhoneNumber, metadata) {
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// Re-create `metadata` because it will be selecting a `country`.
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metadata = new Metadata(metadata)
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for (const country of possibleCountries) {
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metadata.country(country)
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// Leading digits check would be the simplest and fastest one.
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// Leading digits patterns are only defined for about 20% of all countries.
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// https://gitlab.com/catamphetamine/libphonenumber-js/blob/master/METADATA.md#leading_digits
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// Matching "leading digits" is a sufficient but not necessary condition.
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if (metadata.leadingDigits()) {
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if (nationalPhoneNumber &&
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nationalPhoneNumber.search(metadata.leadingDigits()) === 0) {
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return country
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}
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}
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// Else perform full validation with all of those
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// fixed-line/mobile/etc regular expressions.
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else if (getNumberType({ phone: nationalPhoneNumber, country }, undefined, metadata.metadata)) {
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return country
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}
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}
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}
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