parseHotkeys.ts

import { Hotkey, KeyboardModifiers } from './types'

const reservedModifierKeywords = ['shift', 'alt', 'meta', 'mod', 'ctrl']

const mappedKeys: Record<string, string> = {
  esc: 'escape',
  return: 'enter',
  '.': 'period',
  ',': 'comma',
  '-': 'slash',
  ' ': 'space',
  '`': 'backquote',
  '#': 'backslash',
  '+': 'bracketright',
  ShiftLeft: 'shift',
  ShiftRight: 'shift',
  AltLeft: 'alt',
  AltRight: 'alt',
  MetaLeft: 'meta',
  MetaRight: 'meta',
  OSLeft: 'meta',
  OSRight: 'meta',
  ControlLeft: 'ctrl',
  ControlRight: 'ctrl',
}

export function mapKey(key: string): string {
  return (mappedKeys[key] || key)
    .trim()
    .toLowerCase()
    .replace(/key|digit|numpad|arrow/, '')
}

export function isHotkeyModifier(key: string) {
  return reservedModifierKeywords.includes(key)
}

export function parseKeysHookInput(keys: string, splitKey = ','): string[] {
  return keys.split(splitKey)
}

export function parseHotkey(hotkey: string, combinationKey = '+', description?: string): Hotkey {
  const keys = hotkey
    .toLocaleLowerCase()
    .split(combinationKey)
    .map((k) => mapKey(k))

  const modifiers: KeyboardModifiers = {
    alt: keys.includes('alt'),
    ctrl: keys.includes('ctrl') || keys.includes('control'),
    shift: keys.includes('shift'),
    meta: keys.includes('meta'),
    mod: keys.includes('mod'),
  }

  const singleCharKeys = keys.filter((k) => !reservedModifierKeywords.includes(k))

  return {
    ...modifiers,
    keys: singleCharKeys,
    description,
  }
}