server/helpers/markdown.ts

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