@beenotung/tslib/validate.js

utils library in Typescript

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.is_email = exports.to_full_hk_mobile_phone = exports.is_hk_mobile_phone = exports.is_hk_mobile_phone_prefix = void 0;
/**
 * 4, 7, 8 heading are allowed since 2018
 * news: https://skypost.ulifestyle.com.hk/article/2006268/
 * */
function is_hk_mobile_phone_prefix(s) {
    s = s.replace(/^\+852/, '').trim();
    switch (s[0]) {
        case '4':
        case '5':
        case '6':
        case '7':
        case '8':
        case '9':
            return true;
        default:
            return false;
    }
}
exports.is_hk_mobile_phone_prefix = is_hk_mobile_phone_prefix;
/**
 * with/without +852 prefix
 * */
function is_hk_mobile_phone(x) {
    return to_full_hk_mobile_phone(x) !== '';
}
exports.is_hk_mobile_phone = is_hk_mobile_phone;
/**
 * very forgiving
 *
 * @return +852xxxxyyyy if valid
 *         empty string if not valid
 * */
function to_full_hk_mobile_phone(s) {
    if (typeof s === 'number') {
        s = s.toString();
    }
    s = s
        .split('')
        .filter(x => '0' <= x && x <= '9')
        .join('');
    if (s.length === 8 && is_hk_mobile_phone_prefix(s)) {
        return '+852' + s;
    }
    if (s.length === 8 + 3 &&
        s.startsWith('852') &&
        is_hk_mobile_phone_prefix(s.substr(3))) {
        return '+' + s;
    }
    if (s.length === 8 + 4 &&
        s.startsWith('+852') &&
        is_hk_mobile_phone_prefix(s.substr(4))) {
        return s;
    }
    return '';
}
exports.to_full_hk_mobile_phone = to_full_hk_mobile_phone;
function is_email(s) {
    if (!s) {
        return false;
    }
    const ss = s.split('@');
    if (ss.length !== 2) {
        return false;
    }
    const domain = ss[1];
    if (domain !== domain.trim()) {
        return false;
    }
    const names = domain.split('.');
    if (names.some(s => !s) || names.length < 2) {
        return false;
    }
    const username = ss[0];
    if (username !== username.trim()) {
        return false;
    }
    return username.length > 0;
}
exports.is_email = is_email;
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