/src/mochifmt_records.erl
Erlang | 60 lines | 23 code | 7 blank | 30 comment | 0 complexity | 6bc16b7fb95ea7246fee362f534b8748 MD5 | raw file
Possible License(s): MIT
- %% @author Bob Ippolito <bob@mochimedia.com>
- %% @copyright 2008 Mochi Media, Inc.
- %%
- %% Permission is hereby granted, free of charge, to any person obtaining a
- %% copy of this software and associated documentation files (the "Software"),
- %% to deal in the Software without restriction, including without limitation
- %% the rights to use, copy, modify, merge, publish, distribute, sublicense,
- %% and/or sell copies of the Software, and to permit persons to whom the
- %% Software is furnished to do so, subject to the following conditions:
- %%
- %% The above copyright notice and this permission notice shall be included in
- %% all copies or substantial portions of the Software.
- %%
- %% THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- %% IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- %% FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- %% THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- %% LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- %% FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- %% DEALINGS IN THE SOFTWARE.
- %% @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.