bsky-social-app/src/state/shell/composer/useComposerKeyboardShortcut.tsx

import React from 'react'

import {useDialogStateContext} from '#/state/dialogs'
import {useLightbox} from '#/state/lightbox'
import {useModals} from '#/state/modals'
import {useSession} from '#/state/session'
import {useIsDrawerOpen} from '#/state/shell/drawer-open'
import {useComposerControls} from './'

/**
 * Based on {@link https://github.com/jaywcjlove/hotkeys-js/blob/b0038773f3b902574f22af747f3bb003a850f1da/src/index.js#L51C1-L64C2}
 */
function shouldIgnore(event: KeyboardEvent) {
  const target: any = event.target || event.srcElement
  if (!target) return false
  const {tagName} = target
  if (!tagName) return false
  const isInput =
    tagName === 'INPUT' &&
    ![
      'checkbox',
      'radio',
      'range',
      'button',
      'file',
      'reset',
      'submit',
      'color',
    ].includes(target.type)
  // ignore: isContentEditable === 'true', <input> and <textarea> when readOnly state is false, <select>
  if (
    target.isContentEditable ||
    ((isInput || tagName === 'TEXTAREA' || tagName === 'SELECT') &&
      !target.readOnly)
  ) {
    return true
  }
  return false
}

export function useComposerKeyboardShortcut() {
  const {openComposer} = useComposerControls()
  const {openDialogs} = useDialogStateContext()
  const {isModalActive} = useModals()
  const {activeLightbox} = useLightbox()
  const isDrawerOpen = useIsDrawerOpen()
  const {hasSession} = useSession()

  React.useEffect(() => {
    if (!hasSession) {
      return
    }

    function handler(event: KeyboardEvent) {
      if (shouldIgnore(event)) return
      if (
        openDialogs?.current.size > 0 ||
        isModalActive ||
        activeLightbox ||
        isDrawerOpen
      )
        return
      if (event.key === 'n' || event.key === 'N') {
        openComposer({})
      }
    }
    document.addEventListener('keydown', handler)
    return () => document.removeEventListener('keydown', handler)
  }, [
    openComposer,
    isModalActive,
    openDialogs,
    activeLightbox,
    isDrawerOpen,
    hasSession,
  ])
}