(* COCANWIKI scripts.
 * Written by Richard W.M. Jones <rich@merjis.com>.
 * Copyright (C) 2004 Merjis Ltd.
 * $Id: pagestyle.ml,v 1.2 2004/09/07 13:40:10 rich Exp $
 *)

open Apache
open Registry
open Cgi
open Printf

open Cocanwiki

let run r (q : cgi) (dbh : Dbi.connection) (hostid, _, _) _ =
  let page = q#param "page" in
  let version =
    try Some (int_of_string (q#param "version")) with Not_found -> None in

  (* Get the CSS. *)
  let sth =
    match version with
	None ->
	  let sth = dbh#prepare_cached
		      "select css from pages where hostid = ? and url = ?" in
	  sth#execute [`Int hostid; `String page];
	  sth
      | Some version ->
	  let sth = dbh#prepare_cached
		      "select css from pages
                        where hostid = ? and id = ? and
                              (url = ? or url_deleted = ?)" in
	  sth#execute [`Int hostid; `Int version; `String page; `String page];
	  sth in
  let css =
    match sth#fetch1 () with
	[ `Null ] -> ""
      | [ `String css ] -> css
      | _ -> assert false in

  (* It's crucial, for speed of page delivery and rendering, to have
   * an expires header for CSS.  Even though this means that occasionally
   * people will need to hit [Shift]+Reload, I'm going to set a
   * medium-length expiry time on this resource.
   *)
  Table.set (Request.headers_out r) "Expires" (Cgi_expires.expires_medium ());

  q#header ~content_type:"text/css" ();
  print_string r css

let () =
  register_script run