-(* COCANWIKI scripts.
+(* COCANWIKI - a wiki written in Objective CAML.
* Written by Richard W.M. Jones <rich@merjis.com>.
* Copyright (C) 2004 Merjis Ltd.
- * $Id: cocanwiki_template.ml,v 1.2 2004/09/07 14:58:34 rich Exp $
+ * $Id: cocanwiki_template.ml,v 1.5 2004/09/09 12:21:22 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.
+ *
+ * This module wraps around the Template library. It provides caching
+ * of templates and fills in standard fields on a host-specific basis.
+ *
*)
-open Apache
-open Cgi
+open Unix
open Cocanwiki_files
-(* Wrapper around [Cgi.Template.template] function which loads the
- * template from a pre-defined path and sets up some default variables.
- *)
-let get_template =
- let path =
+let base =
+ let base =
try Sys.getenv "COCANWIKI_TEMPLATES"
with Not_found -> "/usr/share/cocanwiki/templates" in
let is_dir path =
try (Unix.stat path).Unix.st_kind = Unix.S_DIR
with Unix.Unix_error _ -> false in
- if not (is_dir path) then
+ if not (is_dir base) then
failwith ("environment variable $COCANWIKI_TEMPLATES " ^
"must be set to point to my 'templates' directory " ^
"(see README file for more details)");
- fun filename ->
- Template.template (path // filename)
+ base
+
+(* The webserver gets restarted regularly enough that this is reasonable. *)
+let { tm_year = year } = gmtime (time ())
+let year = year + 1900
+
+(* Cache of precompiled templates, arranged by full path. *)
+let cache = Hashtbl.create 32
+
+let _get_template filename =
+ let path = base // filename in
+ let stat = Unix.stat path in
+ let mtime = stat.st_mtime in
+
+ try
+ let template, old_mtime = Hashtbl.find cache path in
+ if old_mtime < mtime then (
+ (* The template has changed on disk since it was compiled. Reload. *)
+ let template = Template.template path in
+ Hashtbl.replace cache path (template, mtime);
+ template
+ ) else
+ template
+ with
+ Not_found ->
+ (* Template not seen before, so load it. *)
+ let template = Template.template path in
+ Hashtbl.replace cache path (template, mtime);
+ template
+
+let get_template (dbh : Dbi.connection) hostid filename =
+ let template = _get_template filename in
+
+ (* Get standard fields concerning this host from the database. *)
+ let sth = dbh#prepare_cached "select theme_css from hosts
+ where id = ?" in
+ sth#execute [`Int hostid];
+
+ let theme_css =
+ match sth#fetch1 () with
+ [ `Null ] -> "/_css/standard.css"
+ | [ `String file ] -> file
+ | _ -> assert false in
+
+ template#set "theme_css" theme_css;
+
+ (* Site menu. *)
+ let sth = dbh#prepare_cached "select url, label, ordering from sitemenu
+ where hostid = ? order by ordering" in
+ sth#execute [`Int hostid];
+
+ let table = sth#map (function [`String url; `String label; _] ->
+ [ "url", Template.VarString url;
+ "label", Template.VarString label ]
+ | _ -> assert false) in
+
+ template#table "sitemenu" table;
+
+ (* Wiki version. *)
+ template#set "cocanwiki_package" Cocanwiki_version.package;
+ template#set "cocanwiki_version" Cocanwiki_version.version;
+
+ (* Copyright year. *)
+ template#set "year" (string_of_int year);
+
+ template