def notify_approver():
    """
        Send message to the people with role of Alert Approval
    """

    if settings.has_module("msg"):
        # Notify People with the role of Alert Approval via email and SMS
        alert_id = get_vars.get("cap_alert.id")
        atable = s3db.cap_alert
        if not alert_id and not auth.s3_has_permission("update", atable,
                                                       record_id=alert_id):
            auth.permission.fail()
        row = db(atable.id == alert_id).select(atable.approved_by,
                                               limitby=(0, 1)).first()
        if not row.approved_by:
            # Get the user ids for the role alert_approver
            agtable = db.auth_group
            group_row = db(agtable.role == "Alert Approver").select(\
                                                        agtable.id,
                                                        limitby=(0, 1)).first()
            if group_row:
                user_pe_id = auth.s3_user_pe_id
                user_ids = auth.s3_group_members(group_row.id) # List of user_ids
                pe_ids = [] # List of pe_ids
                pe_append = pe_ids.append
                for user_id in user_ids:
                    pe_append(user_pe_id(int(user_id)))
                subject = "%s: Alert Approval Required" % settings.get_system_name_short()
                url = "%s%s" % (settings.get_base_public_url(),
                                URL(c="cap", f="alert", args=[alert_id, "review"]))
                message = "You are requested to take action on this alert:\n\n%s" % url
                msg.send_by_pe_id(pe_ids, subject, message)
                try:
                    msg.send_by_pe_id(pe_ids, subject, message, contact_method = "SMS")
                except __HOLE__:
                    current.log.error("No SMS Handler defined!")
                session.confirmation = T("Alert Approval Notified")
        else:
            session.error = T("Alert already approved")

    redirect(URL(c="cap", f="alert"))

# -----------------------------------------------------------------------------
dataset/ETHPy150Open sahana/eden/controllers/cap.py/notify_approver