%%%----------------------------------------------------------------------
%%% File    : ejabberd_web.erl
%%% Author  : Alexey Shchepin <alexey@process-one.net>
%%% Purpose : 
%%% Created : 28 Feb 2004 by Alexey Shchepin <alexey@process-one.net>
%%%
%%%
%%% ejabberd, Copyright (C) 2002-2008   ProcessOne
%%%
%%% 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; if not, write to the Free Software
%%% Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
%%% 02111-1307 USA
%%%
%%%----------------------------------------------------------------------

-module(ejabberd_web).
-author('alexey@process-one.net').

%% External exports
-export([make_xhtml/1, make_xhtml/2,
         error/1]).

-include_lib("exmpp/include/exmpp.hrl").

-include("ejabberd.hrl").
-include("ejabberd_http.hrl").


%% XXX bard: there are variants of make_xhtml in ejabberd_http and
%% ejabberd_web_admin.  It might be a good idea to centralize it here
%% and also create an ejabberd_web.hrl file holding the macros, so
%% that third parties can use ejabberd_web as an "utility" library.

make_xhtml(Els) ->
    make_xhtml([], Els).

make_xhtml(HeadEls, Els) ->
    #xmlel{ns = ?NS_XHTML, name = 'html', attrs = [
	#xmlattr{ns = ?NS_XML, name = 'lang', value = "en"},
	#xmlattr{name = 'lang', value = "en"}], children = [
	#xmlel{ns = ?NS_XHTML, name = 'head', children = [
	    #xmlel{ns = ?NS_XHTML, name = 'meta', attrs = [
		#xmlattr{name = 'http-equiv', value = "Content-Type"},
		#xmlattr{name = 'content', value = "text/html; charset=utf-8"}
	      ]}
	    | HeadEls
	  ]},
	#xmlel{ns = ?NS_XHTML, name = 'body', children = Els}
      ]}.


-define(X(Name), #xmlel{ns = ?NS_XHTML, name = Name}).
-define(XA(Name, Attrs), #xmlel{ns = ?NS_XHTML, name = Name, attrs = Attrs}).
-define(XE(Name, Els), #xmlel{ns = ?NS_XHTML, name = Name, children = Els}).
-define(XAE(Name, Attrs, Els), #xmlel{ns = ?NS_XHTML, name = Name,
    attrs = Attrs, children = Els}).
-define(C(Text), #xmlcdata{cdata = list_to_binary(Text)}).
-define(XC(Name, Text), ?XE(Name, [?C(Text)])).
-define(XAC(Name, Attrs, Text), ?XAE(Name, Attrs, [?C(Text)])).

-define(LI(Els), ?XE('li', Els)).
-define(A(URL, Els), ?XAE('a', [#xmlattr{name = 'href', value = URL}], Els)).
-define(AC(URL, Text), ?A(URL, [?C(Text)])).
-define(P, ?X('p')).
-define(BR, ?X('br')).
-define(INPUT(Type, Name, Value),
	?XA('input', [#xmlattr{name = 'type', value = Type},
		      #xmlattr{name = 'name', value = Name},
		      #xmlattr{name = 'value', value = Value}])).

error(not_found) ->
    {404, [], make_xhtml([?XC('h1', "404 Not Found")])};
error(not_allowed) ->
    {401, [], make_xhtml([?XC('h1', "401 Unauthorized")])}.