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86 lines
3.5 KiB
86 lines
3.5 KiB
3 years ago
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import mergeArrays from './mergeArrays.js'
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export default function checkNumberLength(nationalNumber, metadata) {
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return checkNumberLengthForType(nationalNumber, undefined, metadata)
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}
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// Checks whether a number is possible for the country based on its length.
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// Should only be called for the "new" metadata which has "possible lengths".
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export function checkNumberLengthForType(nationalNumber, type, metadata) {
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const type_info = metadata.type(type)
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// There should always be "<possiblePengths/>" set for every type element.
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// This is declared in the XML schema.
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// For size efficiency, where a sub-description (e.g. fixed-line)
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// has the same "<possiblePengths/>" as the "general description", this is missing,
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// so we fall back to the "general description". Where no numbers of the type
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// exist at all, there is one possible length (-1) which is guaranteed
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// not to match the length of any real phone number.
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let possible_lengths = type_info && type_info.possibleLengths() || metadata.possibleLengths()
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// let local_lengths = type_info && type.possibleLengthsLocal() || metadata.possibleLengthsLocal()
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// Metadata before version `1.0.18` didn't contain `possible_lengths`.
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if (!possible_lengths) {
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return 'IS_POSSIBLE'
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}
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if (type === 'FIXED_LINE_OR_MOBILE') {
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// No such country in metadata.
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/* istanbul ignore next */
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if (!metadata.type('FIXED_LINE')) {
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// The rare case has been encountered where no fixedLine data is available
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// (true for some non-geographic entities), so we just check mobile.
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return checkNumberLengthForType(nationalNumber, 'MOBILE', metadata)
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}
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const mobile_type = metadata.type('MOBILE')
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if (mobile_type) {
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// Merge the mobile data in if there was any. "Concat" creates a new
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// array, it doesn't edit possible_lengths in place, so we don't need a copy.
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// Note that when adding the possible lengths from mobile, we have
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// to again check they aren't empty since if they are this indicates
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// they are the same as the general desc and should be obtained from there.
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possible_lengths = mergeArrays(possible_lengths, mobile_type.possibleLengths())
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// The current list is sorted; we need to merge in the new list and
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// re-sort (duplicates are okay). Sorting isn't so expensive because
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// the lists are very small.
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// if (local_lengths) {
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// local_lengths = mergeArrays(local_lengths, mobile_type.possibleLengthsLocal())
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// } else {
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// local_lengths = mobile_type.possibleLengthsLocal()
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// }
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}
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}
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// If the type doesn't exist then return 'INVALID_LENGTH'.
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else if (type && !type_info) {
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return 'INVALID_LENGTH'
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}
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const actual_length = nationalNumber.length
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// In `libphonenumber-js` all "local-only" formats are dropped for simplicity.
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// // This is safe because there is never an overlap beween the possible lengths
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// // and the local-only lengths; this is checked at build time.
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// if (local_lengths && local_lengths.indexOf(nationalNumber.length) >= 0)
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// {
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// return 'IS_POSSIBLE_LOCAL_ONLY'
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// }
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const minimum_length = possible_lengths[0]
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if (minimum_length === actual_length) {
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return 'IS_POSSIBLE'
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}
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if (minimum_length > actual_length) {
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return 'TOO_SHORT'
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}
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if (possible_lengths[possible_lengths.length - 1] < actual_length) {
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return 'TOO_LONG'
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}
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// We skip the first element since we've already checked it.
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return possible_lengths.indexOf(actual_length, 1) >= 0 ? 'IS_POSSIBLE' : 'INVALID_LENGTH'
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}
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