| %% @author Bob Ippolito <bob@mochimedia.com> |
| %% @copyright 2008 Mochi Media, Inc. |
| |
| %% @doc Formatter that understands records. |
| %% |
| %% Usage: |
| %% |
| %% 1> M = mochifmt_records:new([{rec, record_info(fields, rec)}]), |
| %% M:format("{0.bar}", [#rec{bar=foo}]). |
| %% foo |
| |
| -module(mochifmt_records). |
| -author('bob@mochimedia.com'). |
| -export([new/1, get_value/3]). |
| |
| new([{_Rec, RecFields}]=Recs) when is_list(RecFields) -> |
| {?MODULE, Recs}. |
| |
| get_value(Key, Rec, {?MODULE, Recs}) |
| when is_tuple(Rec) and is_atom(element(1, Rec)) -> |
| try begin |
| Atom = list_to_existing_atom(Key), |
| {_, Fields} = proplists:lookup(element(1, Rec), Recs), |
| element(get_rec_index(Atom, Fields, 2), Rec) |
| end |
| catch error:_ -> mochifmt:get_value(Key, Rec) |
| end; |
| get_value(Key, Args, {?MODULE, _Recs}) -> |
| mochifmt:get_value(Key, Args). |
| |
| get_rec_index(Atom, [Atom | _], Index) -> |
| Index; |
| get_rec_index(Atom, [_ | Rest], Index) -> |
| get_rec_index(Atom, Rest, 1 + Index). |
| |
| |
| %% |
| %% Tests |
| %% |
| -ifdef(TEST). |
| -include_lib("eunit/include/eunit.hrl"). |
| -endif. |