Return relevant context in search results returned to slack slash command

server/presenters/slackAttachment.js

@@ -1,13 +1,17 @@
 // @flow
 import { Document } from '../models';
 
-function present(document: Document) {
+function present(document: Document, context?: string) {
+  // the context contains <b> tags around search terms, we convert them here
+  // to the markdown format that slack expects to receive.
+  const text = context ? context.replace(/<\/?b>/, '*') : document.getSummary();
+
   return {
     color: document.collection.color,
     title: document.title,
     title_link: `${process.env.URL}${document.getUrl()}`,
     footer: document.collection.name,
-    text: document.getSummary(),
+    text,
     ts: document.getTimestamp(),
   };
 }