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82 lines
2.7 KiB
82 lines
2.7 KiB
// These mappings map a character (key) to a specific digit that should
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// replace it for normalization purposes. Non-European digits that
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// may be used in phone numbers are mapped to a European equivalent.
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//
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// E.g. in Iraq they don't write `+442323234` but rather `+٤٤٢٣٢٣٢٣٤`.
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//
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export const DIGITS = {
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'0': '0',
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'1': '1',
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'2': '2',
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'3': '3',
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'4': '4',
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'5': '5',
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'6': '6',
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'7': '7',
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'8': '8',
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'9': '9',
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'\uFF10': '0', // Fullwidth digit 0
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'\uFF11': '1', // Fullwidth digit 1
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'\uFF12': '2', // Fullwidth digit 2
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'\uFF13': '3', // Fullwidth digit 3
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'\uFF14': '4', // Fullwidth digit 4
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'\uFF15': '5', // Fullwidth digit 5
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'\uFF16': '6', // Fullwidth digit 6
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'\uFF17': '7', // Fullwidth digit 7
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'\uFF18': '8', // Fullwidth digit 8
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'\uFF19': '9', // Fullwidth digit 9
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'\u0660': '0', // Arabic-indic digit 0
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'\u0661': '1', // Arabic-indic digit 1
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'\u0662': '2', // Arabic-indic digit 2
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'\u0663': '3', // Arabic-indic digit 3
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'\u0664': '4', // Arabic-indic digit 4
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'\u0665': '5', // Arabic-indic digit 5
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'\u0666': '6', // Arabic-indic digit 6
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'\u0667': '7', // Arabic-indic digit 7
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'\u0668': '8', // Arabic-indic digit 8
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'\u0669': '9', // Arabic-indic digit 9
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'\u06F0': '0', // Eastern-Arabic digit 0
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'\u06F1': '1', // Eastern-Arabic digit 1
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'\u06F2': '2', // Eastern-Arabic digit 2
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'\u06F3': '3', // Eastern-Arabic digit 3
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'\u06F4': '4', // Eastern-Arabic digit 4
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'\u06F5': '5', // Eastern-Arabic digit 5
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'\u06F6': '6', // Eastern-Arabic digit 6
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'\u06F7': '7', // Eastern-Arabic digit 7
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'\u06F8': '8', // Eastern-Arabic digit 8
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'\u06F9': '9' // Eastern-Arabic digit 9
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}
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export function parseDigit(character) {
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return DIGITS[character]
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}
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/**
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* Parses phone number digits from a string.
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* Drops all punctuation leaving only digits.
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* Also converts wide-ascii and arabic-indic numerals to conventional numerals.
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* E.g. in Iraq they don't write `+442323234` but rather `+٤٤٢٣٢٣٢٣٤`.
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* @param {string} string
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* @return {string}
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* @example
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* ```js
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* parseDigits('8 (800) 555')
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* // Outputs '8800555'.
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* ```
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*/
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export default function parseDigits(string) {
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let result = ''
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// Using `.split('')` here instead of normal `for ... of`
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// because the importing application doesn't neccessarily include an ES6 polyfill.
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// The `.split('')` approach discards "exotic" UTF-8 characters
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// (the ones consisting of four bytes) but digits
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// (including non-European ones) don't fall into that range
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// so such "exotic" characters would be discarded anyway.
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for (const character of string.split('')) {
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const digit = parseDigit(character)
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if (digit) {
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result += digit
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}
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}
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return result
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} |