rangoo94/bestest

/**
 * Ensure unique name - when it already exists, try to increase beginning index.
 *
 * @param {string} name
 * @param {string[]} existingNames
 * @returns {string}
 */
function buildUniqueName (name: string, existingNames: string[]): string {
  // When it doesn't exists, use it
  if (existingNames.indexOf(name) === -1) {
    return name
  }

  // Iterate to find unique index prefix
  let i = 1
  while (existingNames.indexOf(`${i}-${name}`) !== -1) {
    i++
  }

  return `${i}-${name}`
}

export {
  buildUniqueName
}