import { Value, Block } from 'slate';
import Options from '../options';

/**
 * Return the current list item, from current selection or from a node.
 */
const getCurrentItem = (opts: Options) => (
  value: Value,
  block?: Block
): Block | null => {
  const { document } = value;

  if (!block) {
    if (!value.selection.start.key) {
      return null;
    }
    block = value.startBlock;
  }

  const parent = document.getParent(block.key) as Block;
  return parent && parent.type === opts.typeItem ? parent : null;
};

export default getCurrentItem;