Function renderBlock

packages/notion-x-to-md/src/block.ts:24–377

(
  blockId: string,
  recordMap: ExtendedRecordMap,
  level = 0
)

import { decorationsToMarkdown } from './text'

export async function renderBlock(
  blockId: string,
  recordMap: ExtendedRecordMap,
  level = 0
): Promise<string> {
  const rawBlock = recordMap.block[blockId]
  if (!rawBlock) return ''

  const block = getBlockValue(rawBlock)
  if (!block) return ''

  const { type } = block

  switch (type) {
    case 'page':
      if (level === 0) {
        const title = getTitle(block, recordMap)
        const children = await renderBlockChildren(block, recordMap, level + 1)
        return `# ${title}\n\n${children}\n`
      } else {
        const title = [
          getIcon(block, recordMap),
          getBlockTitle(block, recordMap)
        ]
          .filter(Boolean)
          .join(' ')
        return `[${title}](/${uuidToId(blockId)})\n`
      }

    case 'header':
      return `# ${getTitle(block, recordMap)}\n`

    case 'sub_header':
      return `## ${getTitle(block, recordMap)}\n`

    case 'sub_sub_header':
      return `### ${getTitle(block, recordMap)}\n`

    case 'header_4':
      return `#### ${getTitle(block, recordMap)}\n`

    case 'text': {
      const content = getTitle(block, recordMap)
      const children = await renderBlockChildren(block, recordMap, level + 1)
      if (!content && !children) return '\n'
      if (children) {
        return `${content}\n${prefixLines(children, '  ')}`
      }
      return `${content}\n`
    }

    case 'bulleted_list': {
      const listNestingLevel = getListNestingLevel(block.id, recordMap.block)
      const indent = '  '.repeat(listNestingLevel)
      const content = `${indent}- ${getTitle(block, recordMap)}`
      if (block.content?.length) {
        const children = await renderBlockChildren(block, recordMap, level + 1)
        return `${content}\n${children}`