// eslint-disable-next-line no-control-regex
const rControl = /[\u0000-\u001F]/g
const rSpecial = /[\s~`!@#$%^&*()\-_+=[\]{}|\\;:"'“”‘’<>,.?/]+/g
const rCombining = /[\u0300-\u036F]/g

/**
 * Default slugification function
 */
export function slugify(str: string): string {
  return str
    .normalize('NFKD')
    // Remove accents
    .replace(rCombining, '')
    // Remove control characters
    .replace(rControl, '')
    // Replace special characters
    .replace(rSpecial, '-')
    // Remove continuos separators
    .replace(/-{2,}/g, '-')
    // Remove prefixing and trailing separators
    .replace(/^-+|-+$/g, '')
    // ensure it doesn't start with a number
    .replace(/^(\d)/, '_$1')
    // lowercase
    .toLowerCase()
}