Random Domain Name Generator

randomDomainNameGenerator.js

// @desc Creates a list of domains with custom TLDs using a pattern string with fixed length with option for keywords
// @param   {String}        pattern
// @param   {Array|String}  tlds
// @returns {Array}         domainList
//
//
// Pattern string is defined by:
// - keywords         lowercase
// - any letter       uppercase A
// - consonants       uppercase C
// - vowels           uppercase V

function domainListGenerator (pattern, tlds) {
  const _pattern = pattern.match(/[ACV]|[a-z]+/g);

  const alphabet = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z'];
  const consonants = ['b', 'c', 'd', 'f', 'g', 'h', 'j', 'k', 'l', 'm', 'n', 'p', 'q', 'r', 's', 't', 'v', 'w', 'x', 'y', 'z'];
  const vowels = ['a', 'e', 'i', 'o', 'u'];

  let domainList = [];

  function iterator (lastIndex, word = '', tld = '.com') {
    const index = lastIndex + 1;
    if (index > _pattern.length - 1) {
      let _tld = tld.slice(0, 1) === '.' ? tld : '.' + tld;
      let domain = word + _tld;
      domainList.push(domain.toLowerCase());
    } else if (_pattern[index] === 'A') {
      alphabet.map(letter =>
        iterator(index, word + letter, tld)
      );
    } else if (_pattern[index] === 'C') {
      consonants.map(consonant =>
        iterator(index, word + consonant, tld)
      );
    } else if (_pattern[index] === 'V') {
      vowels.map(vowel =>
        iterator(index, word + vowel, tld)
      );
    } else {
      iterator(index, word + _pattern[index], tld);
    }
  }

  if (Array.isArray(tlds)) {
    tlds.map(tld => iterator(-1, '', tld));
  } else if (typeof tlds === 'string') {
    iterator(-1, '', tlds);
  } else if (!tlds) {
    iterator(-1);
  }

  return domainList;
}

// ..... EXAMPLES .....
domainListGenerator('CVVC')                      // ['baab.com', 'baac.com', ...]
domainListGenerator('CVVC', '.io')               // ['baab.io', 'baeb.io', ...]
domainListGenerator('Vsocial', '.io')            // ['asocial.io', 'esocial.io', ...]
domainListGenerator('educationVC', '.org')       // ['educationab.org', 'educationac.org', ...]
domainListGenerator('coinCVC', ['.net', '.io'])   // ['coinbab.net', 'coinbac.net', ..., 'coinbab.io', 'coinbac.io', ...]

// @desc Returns a random domain with custom TLD using a pattern string with fixed length with option for keywords
// @param   {String}        pattern
// @param   {String}        tld
// @returns {String}        domain
//
//
// Pattern string is defined by:
// - keywords         lowercase
// - any letter       uppercase A
// - consonants       uppercase C
// - vowels           uppercase V

function domainNameGenerator (pattern, tld) {
  const domainList = domainListGenerator(pattern, tld);
  const index = Math.floor(Math.random() * domainList.length);
  const domain = domainList[index];
  return domain;
}

// ..... EXAMPLES .....
domainNameGenerator('CVVC')                      // biex.com
domainNameGenerator('CVVC', '.io')               // tual.io
domainNameGenerator('Vsocial', '.io')            // zsocial.io
domainNameGenerator('educationVC', '.org')       // educational.org
domainNameGenerator('coinCVC', '.net')           // coinrev.net