(* COCANWIKI - a wiki written in Objective CAML.
 * Written by Richard W.M. Jones <rich@merjis.com>.
 * Copyright (C) 2004 Merjis Ltd.
 * $Id: source.ml,v 1.7 2006/08/17 09:11:31 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 ExtList

open Cocanwiki
open Cocanwiki_pages
open Cocanwiki_ok

let rex = Pcre.regexp "\r?\n"
let itempl = Pcre.subst "\r\n\t"

(* This is a very simple script which just returns the source of a page
 * in a format which is easily machine-parsable.
 *)
let run r (q : cgi) dbh hostid _ _ =
  let url = q#param "page" in
  let url = if url = "" then "index" else url in

  let model =
    try load_page dbh hostid ~url ()
    with
	Not_found ->
	  error ~title:"Page not found"
	    dbh hostid q "That page was not found";
	  return () in

  (* XXX CSS - eventually both title and CSS fields should be returned in
   * the Cocanwiki_pages.model_t structure.
   *)

  (* Get the title. *)
  let title = List.hd (
    let model_id = model.id in
    PGSQL(dbh) "select title from pages
                 where hostid = $hostid and id = $model_id"
  ) in

  (* Function to write out fields, with RFC822-like escaping. *)
  let write key value =
    ignore (print_string r key);
    ignore (print_string r ": ");
    ignore (print_string r (Pcre.replace ~rex ~itempl value));
    ignore (print_newline r);
  in

  (* HTTP header. *)
  q#header ~content_type:"text/plain" ();

  (* Write out the standard fields. *)
  write "Version" (Int32.to_string model.id);
  write "Title" title;
  write "Description" model.description;
  (match model.redirect with
   | Some redirect -> write "Redirect" redirect
   | None ->
       write "Section-Count" (string_of_int (List.length model.contents_))
  );
  ignore (print_newline r);

  (* Now write out the sections. *)
  if model.redirect = None then
    List.iteri
      (fun i (sectionname, divname, divclass, jsgo, content) ->
	 write "Section-Id" (string_of_int i);
	 (match sectionname with None -> () | Some sectionname ->
	    write "Section-Header" sectionname);
	 (match divname with None -> () | Some divname ->
	    write "Css-Id" divname);
	 (match divclass with None -> () | Some divclass ->
	    write "Css-Class" divclass);
	 (match jsgo with None -> () | Some jsgo ->
	    write "Javascript-Onclick" jsgo);
	 write "Content" content;
	 ignore (print_newline r)) model.contents_

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