How to send dynamic link in email notification to users based on their roles

Notifications : How to Send dynamic link in email notification to users in watchlist, Assign_to, Requested for, based on their roles:-

Create Event : users.custom.link

Create Notification – Call above event in your notification with event trigger type

Create Business Rule with below code with your trigger conditions:

(function executeRule(current, previous /*null when async*/ ) {
var getRequestedFor = current.request.requested_for;
gs.eventQueue("users.custom.link", current, getRequestedFor, "true");
var getUsers = current.assigned_to + "," + current.watch_list;
var getUsersSplit = getUsers.split(",");
for (var i = 0; i < getUsersSplit.length; i++) {
var checkRole = newGlideRecord("sys_user_has_role");
checkRole.addEncodedQuery("user.sys_idIN" + getUsersSplit[i] + "^role=282bf1fac6112285017366cb5f867469^ORrole=3be5d3d1b7103300dff9fa13ee11a987");
checkRole.query();
if (checkRole.next()) {
gs.eventQueue("users.custom.link", current, getUsersSplit[i], "true");
} else {
gs.eventQueue("users.custom.link", current, getUsersSplit[i], "false");
}
}
})(current, previous);

Create Email Script : users_custom_link

(function runMailScript( /* GlideRecord */ current, /* TemplatePrinter */ template,
    /* Optional EmailOutbound */
    email, /* Optional GlideRecord */ email_action,
    /* Optional GlideRecord */
    event) {
    if (event.parm2 == "true") {
        template.print('<p><a href="sc?id=tickt&amp;table=sc_req_item&amp;sys_id=${sys_id}&view=sp"><button style="background-color: #0071b9; border-radius: 5px; height: 39px; width: 175px; font-size: 15px; font-weight: bold; border-width: 0px; cursor: pointer; color: white;">View ${number}</button></a></p>');
        template.print('</font></p>');
    }
})(current, template, email, email_action, event);

Call the email script in your notification. : ${mail_script:users_custom_link}