backend v4 half

SerpentRace_Backend/node_modules/libphonenumber-js/source/helpers/stripIddPrefix.js

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