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   // Restore line feed
  13   const textWithLineFeed = text.replace(/<br.?\/?>/g, '\r\n')
  14
  15   // Convert possible markdown (emojis, emphasis and lists) to html
  16   const html = markdownIt.render(textWithLineFeed)
  17
  18   // Convert to safe Html
  19   return sanitizeHtml(html, SANITIZE_OPTIONS)
  20 }
  21
  22 const mdToPlainText = text => {
  23   // Convert possible markdown (emojis, emphasis and lists) to html
  24   const html = markdownIt.render(text)
  25
  26   // Convert to safe Html
  27   const safeHtml = sanitizeHtml(html, SANITIZE_OPTIONS)
  28
  29   return safeHtml.replace(/<[^>]+>/g, '')
  30                  .replace(/\n$/, '')
  31                  .replace('\n', ', ')
  32 }
  33
  34 // ---------------------------------------------------------------------------
  35
  36 export {
  37   toSafeHtml,
  38   mdToPlainText
  39 }