'use strict';

const escapeStringRegexp = require('escape-string-regexp');

const NSFW_WORDS = ['nsfw', 'porn', 'nudes', 'sex', '18+'];
const NSFW_REGEXES = NSFW_WORDS.map(
  // We use `(\b|_|-|\s|^)` instead of just `(\b|_)` because the word boundary doesn't
  // match next to the `+` sign in `18+`
  (word) => new RegExp(`(\\b|_|-|\\s|^)${escapeStringRegexp(word)}(\\b|_|-|\\s|$)`, 'i')
);

// A very basic check for NSFW content that just looks for some keywords in the given
// text
function checkTextForNsfw(text) {
  const isNsfw = NSFW_REGEXES.some((regex) => regex.test(text));

  return isNsfw;
}

module.exports = checkTextForNsfw;