Render quoted mentions as text

ts/util/getTextWithMentions.ts

@@ -0,0 +1,12 @@
+import { BodyRangesType } from '../types/Util';
+
+export function getTextWithMentions(
+  bodyRanges: BodyRangesType,
+  text: string
+): string {
+  return bodyRanges.reduce((str, range) => {
+    const textBegin = str.substr(0, range.start);
+    const textEnd = str.substr(range.start + range.length, str.length);
+    return `${textBegin}@${range.replacementText}${textEnd}`;
+  }, text);
+}