@technobuddha/library/regexp/regexp.mjs

A large library of useful functions

/* eslint-disable unicorn/better-regex */
/* eslint-disable require-unicode-regexp */
/* eslint-disable no-control-regex */
import compact from 'lodash/compact';
import zip from 'lodash/zip';
import splitChars from '../splitChars';
import build from '../build';
export function re(template, ...args) {
    const flags = new Set(['u']);
    const reText = build(compact(zip(template, args.map(a => {
        for (const flag of splitChars(a.flags))
            flags.add(flag);
        let source = a.source;
        if (source.startsWith('^') && source.endsWith('$'))
            source = source.slice(1, -1);
        if (source.startsWith('[') && source.endsWith(']'))
            return source;
        if (source.startsWith('(?:') && source.endsWith(')'))
            return source;
        return `(?:${source})`;
    }))
        .flat()));
    return new RegExp(reText, build(flags.values()));
}
const IPV4SEG = /(25[0-5]|(?:2[0-4]|1[0-9]|0?[0-9]|0{0,2})[0-9])/;
/** validate an IPv4 address */
export const ipV4 = re `^${IPV4SEG}\.${IPV4SEG}\.${IPV4SEG}\.${IPV4SEG}$`;
const NET10 = re `^0?10[.]${IPV4SEG}`;
const NET172 = /^172[.]0?(?:1[6-9]|2[0-9]|3[0-1])/;
const NET192 = /^192[.]168$/;
/** determine if Ipv4 address is local */
export const ipV4Local = re `^(?:${NET10}|${NET172}|${NET192})[.]${IPV4SEG}[.]${IPV4SEG}$`;
/** validate a ISO formatted date */
const YEAR = /^\d{4}$/;
const MONTH = /^(?:0[1-9]|1[0-2])$/;
const DAY = /^(?:3[0-1]|[1-2][0-9]|0[1-9])$/;
const HOUR = /^(?:2[0-3]|[0-1][0-9])$/;
const MINUTE = /^[0-5][0-9]$/;
const SECOND = MINUTE;
const FRACTION = /^[0-9]+$/;
const ZONEPLUS = /^[+](?:1[0-4]|0[0-9])$/;
const ZONEMINUS = /^[-](?:1[0-2]|0[0-9])$/;
const ZONEHOUR = re `^${ZONEPLUS}|${ZONEMINUS}$`;
const ZONEMINUTE = /^[0-5][0-9]$/;
const TIMEZONE = re `^(?:(?:${ZONEHOUR}(?::${ZONEMINUTE})?)|Z)$`;
export const isoDate = re `^${YEAR}-${MONTH}-${DAY}T${HOUR}:${MINUTE}(?::${SECOND}(?:[.]${FRACTION})?)?${TIMEZONE}$`;
/** validate a valid number */
export const numeric = /^((?:NaN|[+-]?(?:(?:\d+|\d*[.]\d+)(?:[Ee][+-]?\d+)?|[+-]?Infinity)))$/;
const HOST = /^(?!-)[a-zA-Z0-9-]{1,63}(?<!-)[.]$/;
const TLD = /^[a-z]{2,}$/;
export const domain = re `^${HOST}+${TLD}$`;
/** validate an valid email address */
const EMAILGLYPH = /[a-zA-Z0-9!#$%&'*+/=?^_`{|}~-]/;
const EMAILQUOTE = /[\x01-\x08\x0b\x0c\x0e-\x1f\x21\x23-\x5b\x5d-\x7f]/;
const EMAILESCAPE = /\\[\x01-\x09\x0b\x0c\x0e-\x7f]/;
const EMAILADDRESS = re `(?:${EMAILGLYPH}+(?:[.]${EMAILGLYPH}+)*|"(?:${EMAILQUOTE}|${EMAILESCAPE})*")`;
export const email = re `${EMAILADDRESS}@(?:\\[${ipV4}\\]|${domain})$`;
export default { domain, email, isoDate, numeric, ipV4, ipV4Local };