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30 lines
1.1 KiB
30 lines
1.1 KiB
3 years ago
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import Metadata from '../metadata.js'
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import { VALID_DIGITS } from '../constants.js'
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const CAPTURING_DIGIT_PATTERN = new RegExp('([' + VALID_DIGITS + '])')
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export default function stripIddPrefix(number, country, callingCode, metadata) {
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if (!country) {
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return
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}
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// Check if the number is IDD-prefixed.
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const countryMetadata = new Metadata(metadata)
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countryMetadata.selectNumberingPlan(country, callingCode)
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const IDDPrefixPattern = new RegExp(countryMetadata.IDDPrefix())
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if (number.search(IDDPrefixPattern) !== 0) {
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return
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}
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// Strip IDD prefix.
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number = number.slice(number.match(IDDPrefixPattern)[0].length)
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// If there're any digits after an IDD prefix,
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// then those digits are a country calling code.
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// Since no country code starts with a `0`,
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// the code below validates that the next digit (if present) is not `0`.
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const matchedGroups = number.match(CAPTURING_DIGIT_PATTERN)
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if (matchedGroups && matchedGroups[1] != null && matchedGroups[1].length > 0) {
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if (matchedGroups[1] === '0') {
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return
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}
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}
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return number
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}
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