nip54.ts

export function normalizeIdentifier(name: string): string {
  // Trim and lowercase
  name = name.trim().toLowerCase()

  // Normalize Unicode to NFKC form
  name = name.normalize('NFKC')

  // Convert to array of characters and map each one
  return Array.from(name)
    .map(char => {
      // Check if character is letter or number using Unicode ranges
      if (/\p{Letter}/u.test(char) || /\p{Number}/u.test(char)) {
        return char
      }

      return '-'
    })
    .join('')
}