89 lines
2.9 KiB
Erlang
89 lines
2.9 KiB
Erlang
%% The MIT License
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%% Copyright (c) 2010-2013 Alisdair Sullivan <alisdairsullivan@yahoo.ca>
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%% Permission is hereby granted, free of charge, to any person obtaining a copy
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%% of this software and associated documentation files (the "Software"), to deal
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%% in the Software without restriction, including without limitation the rights
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%% to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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%% copies of the Software, and to permit persons to whom the Software is
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%% furnished to do so, subject to the following conditions:
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%% The above copyright notice and this permission notice shall be included in
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%% all copies or substantial portions of the Software.
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%% THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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%% IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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%% FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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%% AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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%% LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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%% OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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%% THE SOFTWARE.
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-module(jsx_encoder).
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-export([encoder/3, encode/1, encode/2, unzip/1]).
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-spec encoder(Handler::module(), State::any(), Config::list()) -> jsx:encoder().
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encoder(Handler, State, Config) ->
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Parser = jsx:parser(Handler, State, Config),
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fun(Term) -> Parser(encode(Term) ++ [end_json]) end.
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-spec encode(Term::any()) -> any().
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encode(Term) -> encode(Term, ?MODULE).
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-spec encode(Term::any(), EntryPoint::module()) -> any().
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encode([], _EntryPoint) -> [start_array, end_array];
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encode([{}], _EntryPoint) -> [start_object, end_object];
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encode([{_, _}|_] = Term, EntryPoint) ->
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lists:flatten(
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[start_object] ++ [ EntryPoint:encode(T, EntryPoint) || T <- unzip(Term) ] ++ [end_object]
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);
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encode(Term, EntryPoint) when is_list(Term) ->
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lists:flatten(
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[start_array] ++ [ EntryPoint:encode(T, EntryPoint) || T <- Term ] ++ [end_array]
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);
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encode(Else, _EntryPoint) -> [Else].
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unzip(List) -> unzip(List, []).
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unzip([], Acc) -> lists:reverse(Acc);
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unzip([{K, V}|Rest], Acc) when is_binary(K); is_atom(K); is_integer(K) -> unzip(Rest, [V, K] ++ Acc).
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-ifdef(TEST).
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-include_lib("eunit/include/eunit.hrl").
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parser(Term, Opts) -> (jsx:parser(jsx, [], Opts))(Term).
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error_test_() ->
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[
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{"value error", ?_assertError(badarg, parser(self(), []))},
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{"string error", ?_assertError(badarg, parser(<<239, 191, 191>>, [strict]))}
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].
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custom_error_handler_test_() ->
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Error = fun(Term, {_, State, _, _}, _) -> {State, Term} end,
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[
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{"value error", ?_assertEqual(
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{value, [self()]},
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parser(self(), [{error_handler, Error}])
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)},
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{"string error", ?_assertEqual(
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{string, [{string, <<239, 191, 191>>}]},
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parser(<<239, 191, 191>>, [{error_handler, Error}, strict])
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)}
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].
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-endif.
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