User mentions #182
Description
User mentions will help users to notify others by typing their full name or username. When typing @ we need to query the database and search for users based on the string that the user writes after @. You can check the behavior on other social network platforms, like Facebook.
Suppose a user mentions another user in their post or comment. Then, the other user should receive an email that User has mentioned them in their post or if they are online at that moment only the real-time notification.