libphonenumber-js/es6/isPossibleNumber_.js

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

import Metadata from './metadata';
import { check_number_length_for_type } from './getNumberType_';

export default function isPossibleNumber(input, options, metadata) {
	/* istanbul ignore if */
	if (options === undefined) {
		options = {};
	}

	metadata = new Metadata(metadata);

	if (options.v2) {
		if (!input.countryCallingCode) {
			throw new Error('Invalid phone number object passed');
		}
		metadata.chooseCountryByCountryCallingCode(input.countryCallingCode);
	} else {
		if (!input.phone) {
			return false;
		}
		if (input.country) {
			if (!metadata.hasCountry(input.country)) {
				throw new Error('Unknown country: ' + input.country);
			}
			metadata.country(input.country);
		} else {
			if (!input.countryCallingCode) {
				throw new Error('Invalid phone number object passed');
			}
			metadata.chooseCountryByCountryCallingCode(input.countryCallingCode);
		}
	}

	if (!metadata.possibleLengths()) {
		throw new Error('Metadata too old');
	}

	return is_possible_number(input.phone || input.nationalNumber, undefined, metadata);
}

export function is_possible_number(national_number, is_international, metadata) {
	switch (check_number_length_for_type(national_number, undefined, metadata)) {
		case 'IS_POSSIBLE':
			return true;
		// case 'IS_POSSIBLE_LOCAL_ONLY':
		// 	return !is_international
		default:
			return false;
	}
}
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