(* COCANWIKI - a wiki written in Objective CAML.
 * Written by Richard W.M. Jones <rich@merjis.com>.
 * Copyright (C) 2004 Merjis Ltd.
 * $Id: sitemap_xml.ml,v 1.3 2006/03/28 16:24:08 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
open Cocanwiki_date
open Cocanwiki_strings

(* For Google sitemap.xml specification, please see:
 * https://www.google.com/webmasters/sitemaps/docs/en_GB/protocol.html
 *)

let run r (q : cgi) dbh hostid { hostname = hostname } _ =
  let template = get_template dbh hostid "sitemap.xml" in

  (* Pull out all the current pages. *)
  let rows = PGSQL(dbh)
    "select p.url, p.url = 'index', p.last_modified_date
       from pages p
      where p.hostid = $hostid and p.url is not null
        and p.redirect is null
      order by 2 desc, 1" in

  let table =
    List.map
      (function (Some url, Some is_index, last_modified_date) ->
	 let url = if is_index then "" else url in
	 let last_modified_date = iso_8601_date_time last_modified_date in
	 let priority = if is_index then "1.0" else "0.5" in
	 [ "url", Template.VarString url;
	   "last_modified_date", Template.VarString last_modified_date;
	   "priority", Template.VarString priority ]
	 | _ -> assert false) rows in

  template#set "hostname" hostname;
  template#table "sitemap" table;

  q#template ~content_type:"application/xml" template

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