(* COCANWIKI - a wiki written in Objective CAML.
 * Written by Richard W.M. Jones <rich@merjis.com>.
 * Copyright (C) 2004 Merjis Ltd.
 * $Id: cocanwiki_emailnotify.ml,v 1.4 2004/09/24 15:53:57 rich Exp $
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 *)

open Apache
open Registry
open Cgi
open Printf

(* This is where we coordinate email notification from various
 * scripts which create or update the wiki.
 *)
let email_notify ~subject ~body (dbh : Dbi.connection) hostid =
  (* Is anyone listed for email notification at this host? *)
  let sth = dbh#prepare_cached "select email, name from email_notify
	                         where hostid = ?" in
  sth#execute [`Int hostid];

  let to_addr = sth#map (function
			   | [`String email; `String name] ->
			       name ^ " <" ^ email ^ ">"
			   | [`String email; `Null] ->
			       email
			   | _ -> assert false) in

  if to_addr <> [] then (
    (* Prepare the body of the message.  The assumption is that
     * this takes time and database access, so we defer the creation
     * of the body until we know that someone needs to be notified.
     *)
    let body = body () in

    let subject = "Site notice: " ^ subject in

    (* Send the email. *)
    Sendmail.send_mail ~subject ~to_addr ~body ()
  )