(* COCANWIKI - a wiki written in Objective CAML.
 * Written by Richard W.M. Jones <rich@merjis.com>.
 * Copyright (C) 2004 Merjis Ltd.
 * $Id: edit_emails.ml,v 1.6 2004/09/23 11:56:47 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

open Cocanwiki
open Cocanwiki_ok
open Cocanwiki_strings

let split_re = Pcre.regexp "[\\r\\n,;]+"
let email_re = Pcre.regexp "(.*)<(.*)>"

let run r (q : cgi) (dbh : Dbi.connection) _ host' _ =
  let hostid = int_of_string (q#param "hostid") in

  if q#param_true "cancel" then (
    let { hostname = hostname } = host' in
    q#redirect ("http://" ^ hostname ^ "/_bin/admin/host.cmo?hostid=" ^
		string_of_int hostid);
    return ()
  );

  let emails = try q#param "emails" with Not_found -> "" in

  (* It's very hard to verify email addresses.  Thus this script
   * should not be exposed to untrusted users.
   *)
  let check_email str =
    let name, email =
      try
	let subs = Pcre.exec ~rex:email_re str in
	Pcre.get_substring subs 1, Pcre.get_substring subs 2
      with
	  Not_found ->
	    "", str in

    (* Trim whitespace. *)
    trim name, trim email
  in

  let emails = Pcre.split ~rex:split_re emails in
  let emails = List.map check_email emails in
  let emails = List.filter ((<>) ("","")) emails in

  (* Update the database. *)
  let sth = dbh#prepare_cached
	      "delete from email_notify where hostid = ?" in
  sth#execute [`Int hostid];
  let sth = dbh#prepare_cached "insert into email_notify (hostid, email, name)
                                values (?, ?, ?)" in
  List.iter (fun (name, email) ->
	       if name = "" then
		 sth#execute [`Int hostid; `String email; `Null]
	       else
		 sth#execute [`Int hostid; `String email; `String name])
    emails;

  (* Commit to the database. *)
  dbh#commit ();

  (* Print confirmation page. *)
  let buttons = [
    { StdPages.label = "OK";
      StdPages.link = "/_bin/admin/host.cmo";
      StdPages.method_ = None;
      StdPages.params = [ "hostid", string_of_int hostid ] }
  ] in

  ok ~title:"Saved" ~buttons
    q "Email notifications updated."

let () =
  register_script run