26 lines
1.1 KiB
JavaScript
26 lines
1.1 KiB
JavaScript
import Metadata from '../metadata.js'
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import getNumberType from './getNumberType.js'
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export default function getCountryByNationalNumber(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" patterns are only defined for about 20% of all countries.
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// By definition, matching "leading digits" is a sufficient but not a necessary
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// condition for a phone number to belong to a country.
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// The point of "leading digits" check is that it's the fastest one to get a match.
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// https://gitlab.com/catamphetamine/libphonenumber-js/blob/master/METADATA.md#leading_digits
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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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} |