(* COCANWIKI scripts.
 * Written by Richard W.M. Jones <rich@merjis.com>.
 * Copyright (C) 2004 Merjis Ltd.
 * $Id: forgot_password.ml,v 1.3 2004/09/09 09:35:33 rich Exp $
 *)

open Apache
open Registry
open Cgi
open Printf

open Cocanwiki
open Cocanwiki_ok
open Cocanwiki_strings

let run r (q : cgi) (dbh : Dbi.connection) hostid { hostname = hostname } _ =
  let name = trim (q#param "name") in

  if name = "" then (
    error ~back_button:true ~title:"No username or email address"
      q "You didn't give a username or email address";
    raise CgiExit
  );

  (* Look it up in the database. *)
  let sth = dbh#prepare_cached "select email, name, password from users
                                 where hostid = ?
                                   and (lower (name) = lower (?)
                                        or lower (email) = lower (?))" in
  sth#execute [`Int hostid; `String name; `String name];

  try
    let email, name, password = match sth#fetch1 () with
	[ `String email; `String name; `String password ] ->
	  email, name, password
      | _ -> assert false in

    (* Get the IP address of the user, if available. *)
    let ip =
      try Connection.remote_ip (Request.connection r) with Not_found -> "" in

    let subject = "Password for " ^ hostname in

    let body =
      "Someone, possibly you, requested your password for " ^ hostname ^
      ".\n\n" ^
      "Username: " ^ name ^ "\n" ^
      "Password: " ^ password ^ "\n" ^
      "\n" ^
      "IP address of request: " ^ ip ^ "\n" in

    Sendmail.send_mail ~subject ~to_addr:[ email ] ~body ();

    let buttons = [ ok_button "/_login" ] in
    ok ~buttons ~title:"Password sent by email"
      q
      ("Your password was sent by email.  If you don't receive the password " ^
       "within an hour, please notify the site's administrator.")
  with
      Not_found ->
	(* Artificially limit the rate at which people can search the database
	 * for usernames.
	 *)
	Unix.sleep 10;

	error ~back_button:true ~title:"Nothing known"
	  q "Sorry, don't know anyone with that name or email address."

let () =
  register_script run