1 (* COCANWIKI - a wiki written in Objective CAML.
2 * Written by Richard W.M. Jones <rich@merjis.com>.
3 * Copyright (C) 2004 Merjis Ltd.
4 * $Id: cocanwiki_template.ml,v 1.5 2004/09/09 12:21:22 rich Exp $
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; see the file COPYING. If not, write to
18 * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 * Boston, MA 02111-1307, USA.
21 * This module wraps around the Template library. It provides caching
22 * of templates and fills in standard fields on a host-specific basis.
32 try Sys.getenv "COCANWIKI_TEMPLATES"
33 with Not_found -> "/usr/share/cocanwiki/templates" in
35 try (Unix.stat path).Unix.st_kind = Unix.S_DIR
36 with Unix.Unix_error _ -> false in
37 if not (is_dir base) then
38 failwith ("environment variable $COCANWIKI_TEMPLATES " ^
39 "must be set to point to my 'templates' directory " ^
40 "(see README file for more details)");
43 (* The webserver gets restarted regularly enough that this is reasonable. *)
44 let { tm_year = year } = gmtime (time ())
45 let year = year + 1900
47 (* Cache of precompiled templates, arranged by full path. *)
48 let cache = Hashtbl.create 32
50 let _get_template filename =
51 let path = base // filename in
52 let stat = Unix.stat path in
53 let mtime = stat.st_mtime in
56 let template, old_mtime = Hashtbl.find cache path in
57 if old_mtime < mtime then (
58 (* The template has changed on disk since it was compiled. Reload. *)
59 let template = Template.template path in
60 Hashtbl.replace cache path (template, mtime);
66 (* Template not seen before, so load it. *)
67 let template = Template.template path in
68 Hashtbl.replace cache path (template, mtime);
71 let get_template (dbh : Dbi.connection) hostid filename =
72 let template = _get_template filename in
74 (* Get standard fields concerning this host from the database. *)
75 let sth = dbh#prepare_cached "select theme_css from hosts
77 sth#execute [`Int hostid];
80 match sth#fetch1 () with
81 [ `Null ] -> "/_css/standard.css"
82 | [ `String file ] -> file
83 | _ -> assert false in
85 template#set "theme_css" theme_css;
88 let sth = dbh#prepare_cached "select url, label, ordering from sitemenu
89 where hostid = ? order by ordering" in
90 sth#execute [`Int hostid];
92 let table = sth#map (function [`String url; `String label; _] ->
93 [ "url", Template.VarString url;
94 "label", Template.VarString label ]
95 | _ -> assert false) in
97 template#table "sitemenu" table;
100 template#set "cocanwiki_package" Cocanwiki_version.package;
101 template#set "cocanwiki_version" Cocanwiki_version.version;
103 (* Copyright year. *)
104 template#set "year" (string_of_int year);