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