Function decorationsToMarkdown

packages/notion-x-to-md/src/text.ts:4–126

(
  decorations: Decoration[],
  recordMap: RecordMap
)

import { formatDate, getBlockValue, getTextContent } from 'notion-utils'

export function decorationsToMarkdown(
  decorations: Decoration[],
  recordMap: RecordMap
): string {
  return decorations
    .map((decoration) => {
      const text = decoration[0]
      const formatting = decoration[1]

      if (!formatting?.length) {
        return text
      }

      return formatting.reduce((result: string, format) => {
        const formatType = format[0]
        const formatValue = format[1]

        switch (formatType) {
          case 'b':
            return `**${result}**`

          case 'i':
            return `_${result}_`

          case 's':
            return `~~${result}~~`

          case 'c':
            return `\`${result}\``

          case 'a':
            return `[${result}](${formatValue as string})`

          case 'p': {
            const pageId = formatValue as string
            const pageBlock = getBlockValue(recordMap.block[pageId])
            const pageTitle = (pageBlock as any)?.properties?.title
              ? getTextContent((pageBlock as any).properties.title)
              : pageId
            return `[${pageTitle}](/${pageId})`
          }

          case '‣': {
            const [_, linkId] = formatValue as [string, string]
            const targetBlock = getBlockValue(recordMap.block[linkId])
            const title = (targetBlock as any)?.properties?.title
              ? getTextContent((targetBlock as any).properties.title)
              : linkId
            return `[${title}](/${linkId})`
          }

          case 'e':
            return `$${formatValue as string}$`

          case 'd': {
            const dateVal = formatValue as FormattedDate
            let dateStr = formatDate(dateVal.start_date)
            if (dateVal.end_date) {