@beenotung/tslib
Version:
utils library in Typescript
108 lines (107 loc) • 4.12 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.is_vn_mobile_phone_prefix = is_vn_mobile_phone_prefix;
exports.is_vn_mobile_phone = is_vn_mobile_phone;
exports.to_full_vn_mobile_phone = to_full_vn_mobile_phone;
exports.format_vn_mobile_phone = format_vn_mobile_phone;
const utils_1 = require("./utils");
/** ******************************
* Vietnam mobile phone number *
*********************************/
/**
* Checks if the number starts with a valid Vietnam mobile phone prefix
*
* Valid prefixes: 09x, 08x, 07x, 03x, or 05x (where x is any digit)
* Format: 09/08/07/05/03xx xxx xxx (10 digits with leading 0 in local format)
* Reference: https://en.wikipedia.org/wiki/Telephone_numbers_in_Vietnam
*/
function is_vn_mobile_phone_prefix(tel) {
tel = tel.replace(/^\+84/, '').trim();
// Check prefix with leading 0 (local format: 091 234 5678)
if (tel.startsWith('0') && tel.length >= 3) {
const firstTwo = tel.substring(0, 2);
// Valid prefixes: 09, 08, 07, 03, 05
return ['09', '08', '07', '03', '05'].includes(firstTwo);
}
// Check prefix without leading 0 (internal format: 91 234 5678)
// Should start with 9, 8, 7, 3, or 5 (first digit of mobile prefixes)
if (tel.length >= 1) {
const firstDigit = tel[0];
return ['9', '8', '7', '3', '5'].includes(firstDigit);
}
return false;
}
/**
* with/without +84 prefix
*/
function is_vn_mobile_phone(tel) {
return to_full_vn_mobile_phone(tel) !== '';
}
/**
* very forgiving
*
* @returns +84xxxxxxxxx if valid (9 digits after country code, NO leading 0 in internal format)
* empty string if not valid
*
* Format notes:
* - Local format: 091 234 5678 (10 digits WITH leading 0) - used in Vietnam
* - Internal format: +84 98 765 4321 (9 digits after +84, NO leading 0) - always 9 digits
* - Display format: +84 98 765 4321 (formatted by format_vn_mobile_phone)
*/
function to_full_vn_mobile_phone(tel) {
tel = (0, utils_1.to_tel_digits)(tel);
// Local format: 10 digits with leading 0, or 9 digits without leading 0
// Examples: 091 234 5678 (with 0) or 91 234 5678 (without 0)
// Result: +84 98 765 4321 (always 9 digits after +84)
if (tel.length === 10 &&
tel.startsWith('0') &&
is_vn_mobile_phone_prefix(tel)) {
return '+84' + tel.substring(1);
}
if (tel.length === 9 && is_vn_mobile_phone_prefix(tel)) {
return '+84' + tel;
}
// Country code 84 (without +): 10 digits with leading 0, or 9 digits without leading 0
// Examples: 84 091 234 5678 (with 0) or 84 91 234 5678 (without 0)
// Result: +84 98 765 4321 (always 9 digits after +84)
if (tel.length === 10 + 2 &&
tel.startsWith('84') &&
tel.substring(2).startsWith('0') &&
is_vn_mobile_phone_prefix(tel.substring(2))) {
return '+84' + tel.substring(3);
}
if (tel.length === 9 + 2 &&
tel.startsWith('84') &&
is_vn_mobile_phone_prefix(tel.substring(2))) {
return '+' + tel;
}
// Country code +84: 10 digits with leading 0, or 9 digits without leading 0
// Examples: +84 091 234 5678 (with 0) or +84 91 234 5678 (without 0)
// Result: +84 98 765 4321 (always 9 digits after +84)
if (tel.length === 10 + 3 &&
tel.startsWith('+84') &&
tel.substring(3).startsWith('0') &&
is_vn_mobile_phone_prefix(tel.substring(3))) {
return '+84' + tel.substring(4);
}
if (tel.length === 9 + 3 &&
tel.startsWith('+84') &&
is_vn_mobile_phone_prefix(tel.substring(3))) {
return tel;
}
return '';
}
/**
* @returns +84 AA BBB BBBB if valid
*/
function format_vn_mobile_phone(tel) {
tel = to_full_vn_mobile_phone(tel);
if (!tel)
return tel;
// Remove leading zero if present (legacy support)
const digits = (0, utils_1.to_tel_digits)(tel).replace('+84', '');
if (digits.length === 10 && digits.startsWith('0')) {
tel = '+84' + digits.substring(1);
}
return (0, utils_1.format_tel_with_pattern)(tel, '+84 AA BBB BBBB');
}