server/helpers/markdown.ts

   1 import { getSanitizeOptions, TEXT_WITH_HTML_RULES } from '@shared/core-utils'
   2
   3 const sanitizeOptions = getSanitizeOptions()
   4
   5 const sanitizeHtml = require('sanitize-html')
   6 const markdownItEmoji = require('markdown-it-emoji/light')
   7 const MarkdownItClass = require('markdown-it')
   8 const markdownIt = new MarkdownItClass('default', { linkify: true, breaks: true, html: true })
   9
  10 markdownIt.enable(TEXT_WITH_HTML_RULES)
  11 markdownIt.use(markdownItEmoji)
  12
  13 const toSafeHtml = text => {
  14   if (!text) return ''
  15
  16   // Restore line feed
  17   const textWithLineFeed = text.replace(/<br.?\/?>/g, '\r\n')
  18
  19   // Convert possible markdown (emojis, emphasis and lists) to html
  20   const html = markdownIt.render(textWithLineFeed)
  21
  22   // Convert to safe Html
  23   return sanitizeHtml(html, sanitizeOptions)
  24 }
  25
  26 const mdToPlainText = text => {
  27   if (!text) return ''
  28
  29   // Convert possible markdown (emojis, emphasis and lists) to html
  30   const html = markdownIt.render(text)
  31
  32   // Convert to safe Html
  33   const safeHtml = sanitizeHtml(html, sanitizeOptions)
  34
  35   return safeHtml.replace(/<[^>]+>/g, '')
  36                  .replace(/\n$/, '')
  37                  .replace('\n', ', ')
  38 }
  39
  40 // ---------------------------------------------------------------------------
  41
  42 export {
  43   toSafeHtml,
  44   mdToPlainText
  45 }