1 files changed, 43 insertions, 0 deletions

diff --git a/server/helpers/markdown.ts b/server/helpers/markdown.ts
new file mode 100644
index 000000000..2126bb752
--- /dev/null
+++ b/server/helpers/markdown.ts
@@ -0,0 +1,43 @@
+import { SANITIZE_OPTIONS, TEXT_WITH_HTML_RULES } from '@shared/core-utils'
+
+const sanitizeHtml = require('sanitize-html')
+const markdownItEmoji = require('markdown-it-emoji/light')
+const MarkdownItClass = require('markdown-it')
+const markdownIt = new MarkdownItClass('default', { linkify: true, breaks: true, html: true })
+
+markdownIt.enable(TEXT_WITH_HTML_RULES)
+markdownIt.use(markdownItEmoji)
+
+const toSafeHtml = text => {
+  if (!text) return ''
+
+  // Restore line feed
+  const textWithLineFeed = text.replace(/<br.?\/?>/g, '\r\n')
+
+  // Convert possible markdown (emojis, emphasis and lists) to html
+  const html = markdownIt.render(textWithLineFeed)
+
+  // Convert to safe Html
+  return sanitizeHtml(html, SANITIZE_OPTIONS)
+}
+
+const mdToPlainText = text => {
+  if (!text) return ''
+
+  // Convert possible markdown (emojis, emphasis and lists) to html
+  const html = markdownIt.render(text)
+
+  // Convert to safe Html
+  const safeHtml = sanitizeHtml(html, SANITIZE_OPTIONS)
+
+  return safeHtml.replace(/<[^>]+>/g, '')
+                 .replace(/\n$/, '')
+                 .replace('\n', ', ')
+}
+
+// ---------------------------------------------------------------------------
+
+export {
+  toSafeHtml,
+  mdToPlainText
+}