Chore: Add safe regex in search

Author: pavelzotikov

src/models/eventsFactory.js

@@ -1,5 +1,6 @@
 import { getMidnightWithTimezoneOffset, getUTCMidnight } from '../utils/dates';
 import { groupBy } from '../utils/grouper';
+import safe from 'safe-regex';
 
 const Factory = require('./modelFactory');
 const mongo = require('../mongo');
@@ -164,6 +165,13 @@ class EventsFactory extends Factory {
       throw new Error('Search parameter must be a string');
     }
 
+    /**
+     * Check if pattern is safe RegExp
+     */
+    if (!safe(search)) {
+      throw new Error('Invalid regular expression pattern');
+    }
+
     const escapedSearch = search.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
 
     limit = this.validateLimit(limit);