Lock Timesheet for Users who do not have 'Projects Manager' Role

timesheet_lock.js

frappe.ui.form.on("Timesheet", "validate", function(frm) {

    if (frappe.user_roles.indexOf("Projects Manager") == -1) {

        const t = new Date().getDate() + (6 - new Date().getDay() - 1) - 7;
        const lastFriday = new Date();
        lastFriday.setDate(t);

        let dd = lastFriday.getDate();
        let mm = lastFriday.getMonth() + 1;
        let yyyy = lastFriday.getFullYear();


        frm.doc.time_logs.forEach(log => {
            if (new Date(log.from_time) <= lastFriday) {
                frappe.throw("You cannot add timesheet for dates before last Friday " + dd + "/" + mm + "/" + yyyy + ". Please contact your Project Manager.");
            }
        })
    }
})