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74 lines
2.7 KiB
JavaScript
74 lines
2.7 KiB
JavaScript
import extractPhoneContext, {
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isPhoneContextValid,
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PLUS_SIGN,
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RFC3966_PREFIX_,
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RFC3966_PHONE_CONTEXT_,
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RFC3966_ISDN_SUBADDRESS_
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} from './extractPhoneContext.js'
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import ParseError from '../ParseError.js'
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/**
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* @param {string} numberToParse
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* @param {string} nationalNumber
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* @return {}
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*/
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export default function extractFormattedPhoneNumberFromPossibleRfc3966NumberUri(numberToParse, {
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extractFormattedPhoneNumber
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}) {
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const phoneContext = extractPhoneContext(numberToParse)
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if (!isPhoneContextValid(phoneContext)) {
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throw new ParseError('NOT_A_NUMBER')
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}
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let phoneNumberString
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if (phoneContext === null) {
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// Extract a possible number from the string passed in.
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// (this strips leading characters that could not be the start of a phone number)
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phoneNumberString = extractFormattedPhoneNumber(numberToParse) || ''
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} else {
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phoneNumberString = ''
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// If the phone context contains a phone number prefix, we need to capture
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// it, whereas domains will be ignored.
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if (phoneContext.charAt(0) === PLUS_SIGN) {
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phoneNumberString += phoneContext
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}
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// Now append everything between the "tel:" prefix and the phone-context.
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// This should include the national number, an optional extension or
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// isdn-subaddress component. Note we also handle the case when "tel:" is
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// missing, as we have seen in some of the phone number inputs.
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// In that case, we append everything from the beginning.
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const indexOfRfc3966Prefix = numberToParse.indexOf(RFC3966_PREFIX_)
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let indexOfNationalNumber
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// RFC 3966 "tel:" prefix is preset at this stage because
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// `isPhoneContextValid()` requires it to be present.
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/* istanbul ignore else */
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if (indexOfRfc3966Prefix >= 0) {
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indexOfNationalNumber = indexOfRfc3966Prefix + RFC3966_PREFIX_.length
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} else {
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indexOfNationalNumber = 0
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}
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const indexOfPhoneContext = numberToParse.indexOf(RFC3966_PHONE_CONTEXT_)
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phoneNumberString += numberToParse.substring(indexOfNationalNumber, indexOfPhoneContext)
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}
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// Delete the isdn-subaddress and everything after it if it is present.
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// Note extension won't appear at the same time with isdn-subaddress
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// according to paragraph 5.3 of the RFC3966 spec.
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const indexOfIsdn = phoneNumberString.indexOf(RFC3966_ISDN_SUBADDRESS_)
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if (indexOfIsdn > 0) {
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phoneNumberString = phoneNumberString.substring(0, indexOfIsdn)
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}
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// If both phone context and isdn-subaddress are absent but other
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// parameters are present, the parameters are left in nationalNumber.
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// This is because we are concerned about deleting content from a potential
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// number string when there is no strong evidence that the number is
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// actually written in RFC3966.
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if (phoneNumberString !== '') {
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return phoneNumberString
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}
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} |