%%%-------------------------------------------------------------------
%%% File : motorcycles2html.erl
%%% Author : Bertil Karlsson <[email protected]>
%%% Description :
%%%
%%% Created : 2 Sep 2004 by Bertil Karlsson <[email protected]>
%%%-------------------------------------------------------------------
-module(motorcycles2html).
-include_lib("xmerl/include/xmerl.hrl").
-import(xmerl_xs,
[ xslapply/2, value_of/1, select/2, built_in_rules/2 ]).
-export([process_xml/1,process_to_file/2,process_to_file/1]).
process_xml(Doc) ->
template(Doc).
process_to_file(FileName) ->
process_to_file(FileName,'motorcycles.xml').
process_to_file(FileName,XMLDoc) ->
case file:open(FileName,[write]) of
{ok,IOF} ->
{XMLContent,_} = xmerl_scan:file(XMLDoc),
TransformedXML=process_xml(XMLContent),
io:format(IOF,"~s",[TransformedXML]),
file:close(IOF);
{error,Reason} ->
io:format("could not open file due to ~p.~n",[Reason])
end.
%%% templates
template(E = #xmlElement{name='motorcycles'}) ->
[ "<head>\n<title>motorcycles</title>\n</head>\n",
"<body>\n",
"<h1>Used Motorcycles</h1>\n",
"<ul>\n",
remove_duplicates(value_of(select("bike/name/manufacturer",E))),
"\n</ul>\n",
sort_by_manufacturer(xslapply(fun template/1, E)),
"</body>\n",
"</html>\n"];
template(E = #xmlElement{name='bike'}) ->
{value_of(select("name/manufacturer",E)),["<dt>",xslapply(fun template/1,select("name",E)),"</dt>",
"<dd><ul>\n",
"<li style=\"color:green\">Manufacturing year: ",xslapply(fun template/1,select("@year",E)),"</li>\n",
"<li style=\"color:red\">Color: ",xslapply(fun template/1,select("@color",E)),"</li>\n",
"<li style=\"color:blue\">Shape : ",xslapply(fun template/1,select("@condition",E)),"</li>\n",
"</ul></dd>\n"]};
template(E) -> built_in_rules(fun template/1, E).
%%%%%%%%%%% helper routines
%% sorts on the bike name element, unwraps the bike information and
%% inserts a line feed and indentation on each bike element.
sort_by_manufacturer(L) ->
Tuples=[X1||X1={_,_} <- L],
SortedTS = lists:keysort(1,Tuples),
InsertRefName_UnWrap=
fun([{[Name],V}|Rest],Name,F)->
[V|F(Rest,Name,F)];
([{[Name],V}|Rest],_PreviousName,F) ->
[["<a name=\"",Name,"\"></>"],V|F(Rest,Name,F)];
([],_,_) -> []
end,
SortedRefed=InsertRefName_UnWrap(SortedTS,no_name,InsertRefName_UnWrap),
% SortedTs=[Y||{X,Y}<-lists:keysort(1,Tuples)],
WS = "\n ",
Fun=fun([H|T],Acc,F)->
F(T,[H,WS|Acc],F);
([],Acc,_F)->
lists:reverse([WS|Acc])
end,
if length(SortedRefed) > 0 ->
Fun(SortedRefed,[],Fun);
true -> []
end.
%% removes all but the first of an element in L and inserts a html
%% reference for each list element.
remove_duplicates(L) ->
remove_duplicates(L,[]).
remove_duplicates([],Acc) ->
make_ref(lists:sort(lists:reverse(Acc)));
remove_duplicates([A|L],Acc) ->
case lists:delete(A,L) of
L ->
remove_duplicates(L,[A|Acc]);
L1 ->
remove_duplicates([A|L1],[Acc])
end.
make_ref([]) -> [];
make_ref([H]) when is_atom(H) ->
"<ul><a href=\"#"++atom_to_list(H)++"\">"++atom_to_list(H)++"</a></ul>";
make_ref([H]) when is_list(H) ->
"<ul><a href=\"#"++H++"\">\s"++H++"</a></ul>";
make_ref([H|T]) when is_atom(H) ->
["<ul><a href=\"#"++atom_to_list(H)++"\">\s"++atom_to_list(H)++",\n</a></ul>"
|make_ref(T)];
make_ref([H|T]) when is_list(H) ->
["<ul><a href=\"#"++H++"\">\s"++H++",\n</a></ul>"|make_ref(T)].
