Add new action link to Admin Booking Table Summary

<?php
/*
 * This snippet will add new action link at Events > Bookings
* @param action array  $booking_actions
* @param EM_Booking $EM_Booking
*/
function em_mod_booking_resend($booking_actions, $EM_Booking){
    $url = $EM_Booking->get_event()->get_bookings_url();
    $booking_actions['send_email'] = '<a class="em-bookings-resend_email" href="'.em_add_get_params($url, array('action'=>'mod_booking_resend_email', 'booking_id'=>$EM_Booking->booking_id)).'">'.__('Re-send Email','dbem').'</a>';
    return $booking_actions;
}
add_filter('em_bookings_table_cols_col_action','em_mod_booking_resend',10,2);


/*
 * This snippet will be responsible for handling request to re-send Booking Emails
* based on the status of the event.
*/
function em_mod_booking_resend_action(){
    global $wpdb, $EM_Event, $EM_Booking, $EM_Notices;
    if ( !empty($_REQUEST['action']) && $_REQUEST['action'] == 'mod_booking_resend_email' ){
        if( $EM_Booking->can_manage('manage_bookings','manage_others_bookings') ){
            if( $EM_Booking->email(false, true) ){
                if( $EM_Booking->mails_sent > 0 ) {
                    $EM_Notices->add_confirm( __('Email Sent.','dbem'), true );
                }else{
                    $EM_Notices->add_confirm( _x('No emails to send for this booking.', 'bookings', 'dbem'), true );
                }
                $redirect = !empty($_REQUEST['redirect_to']) ? $_REQUEST['redirect_to'] : wp_get_referer();
                wp_redirect( $redirect );
                exit();
            }else{
                $result = false;
                $EM_Notices->add_error( __('ERROR : Email Not Sent.','dbem') );
                $feedback = $EM_Booking->feedback_message;
            }
        }
    }

}
add_action('init','em_mod_booking_resend_action',11);

/*
 * This snippet will override the booking email templates
 *
 * Status:
 * 0 = Pending
 * 1 = Approved
 * 2 = Rejected
 * 3 = Cancelled
 * 4 = Awaiting Online Payment
 * 5 = Awaiting Payment
 *
 * eg.
 * if ( $EM_Booking->get_status() == 0 ) {} // for Pending bookings
 * if ( $EM_Booking->get_status() == 1 ) {} // for Approved bookings
 *
 */
function my_event_messages( $msg, $EM_Booking ){
    if ( $EM_Booking->get_status() == 0 ) {
        $msg['user']['subject'] = 'New Subject';
        $msg['user']['body'] = 'New email body';
    }
    return $msg;
}

add_filter('em_booking_email_messages','my_event_messages',10,2);