Ocelot-Social/backend/src/middleware/slugify/uniqueSlug.js

import slugify from 'slug'
export default async function uniqueSlug (string, isUnique) {
  let slug = slugify(string || 'anonymous', {
    lower: true
  })
  if (await isUnique(slug)) return slug

  let count = 0
  let uniqueSlug
  do {
    count += 1
    uniqueSlug = `${slug}-${count}`
  } while (!await isUnique(uniqueSlug))
  return uniqueSlug
}