(* COCANWIKI - a wiki written in Objective CAML.
 * Written by Richard W.M. Jones <rich@merjis.com>.
 * Copyright (C) 2004 Merjis Ltd.
 * $Id: dead_ends.ml,v 1.3 2006/03/27 18:09:46 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_template

let run r (q : cgi) dbh hostid _ _ =
  let template = get_template dbh hostid "dead_ends.html" in

  let rows =
    PGSQL(dbh)
      "select p.url, p.title, count (l.to_url)
         from pages p left outer join links l
              on p.hostid = l.hostid and p.url = l.from_url
        where p.hostid = $hostid
          and p.url is not null
          and p.redirect is null
        group by 1, 2
       having count(l.to_url) = 0
        order by 1" in

  let table =
    List.map (
      fun (page, title, _) ->
	let page = Option.get page in
	[ "page", Template.VarString page;
	  "title", Template.VarString title ]
    ) rows in

  template#table "pages" table;

  q#template template

let () =
  register_script ~restrict:[CanView] run