rename jsx_utils jsx_config
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alisdair sullivan
parent
76ccb0722a
commit
89d3cbbd36
11 changed files with 57 additions and 59 deletions
308
src/jsx_config.erl
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308
src/jsx_config.erl
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%% The MIT License
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%% Copyright (c) 2010 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_config).
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-export([parse_config/1]).
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-export([config_to_list/1]).
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-export([extract_config/1, valid_flags/0]).
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-ifdef(TEST).
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-export([fake_error_handler/3]).
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-endif.
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-include("jsx_config.hrl").
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%% parsing of jsx config
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parse_config(Config) ->
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parse_config(Config, #config{}).
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parse_config([], Config) ->
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Config;
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parse_config([replaced_bad_utf8|Rest], Config) ->
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parse_config(Rest, Config#config{replaced_bad_utf8=true});
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parse_config([escaped_forward_slashes|Rest], Config) ->
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parse_config(Rest, Config#config{escaped_forward_slashes=true});
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parse_config([explicit_end|Rest], Config) ->
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parse_config(Rest, Config#config{explicit_end=true});
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parse_config([single_quoted_strings|Rest], Config) ->
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parse_config(Rest, Config#config{single_quoted_strings=true});
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parse_config([unescaped_jsonp|Rest], Config) ->
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parse_config(Rest, Config#config{unescaped_jsonp=true});
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parse_config([comments|Rest], Config) ->
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parse_config(Rest, Config#config{comments=true});
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parse_config([escaped_strings|Rest], Config) ->
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parse_config(Rest, Config#config{escaped_strings=true});
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parse_config([dirty_strings|Rest], Config) ->
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parse_config(Rest, Config#config{dirty_strings=true});
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parse_config([ignored_bad_escapes|Rest], Config) ->
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parse_config(Rest, Config#config{ignored_bad_escapes=true});
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parse_config([relax|Rest], Config) ->
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parse_config(Rest, Config#config{
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replaced_bad_utf8 = true,
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single_quoted_strings = true,
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comments = true,
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ignored_bad_escapes = true
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});
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parse_config([{pre_encode, Encoder}|Rest] = Options, Config) when is_function(Encoder, 1) ->
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case Config#config.pre_encode of
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false -> parse_config(Rest, Config#config{pre_encode=Encoder})
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; _ -> erlang:error(badarg, [Options, Config])
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end;
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parse_config([{error_handler, ErrorHandler}|Rest] = Options, Config) when is_function(ErrorHandler, 3) ->
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case Config#config.error_handler of
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false -> parse_config(Rest, Config#config{error_handler=ErrorHandler})
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; _ -> erlang:error(badarg, [Options, Config])
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end;
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parse_config([{incomplete_handler, IncompleteHandler}|Rest] = Options, Config) when is_function(IncompleteHandler, 3) ->
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case Config#config.incomplete_handler of
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false -> parse_config(Rest, Config#config{incomplete_handler=IncompleteHandler})
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; _ -> erlang:error(badarg, [Options, Config])
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end;
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%% deprecated flags
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parse_config([{pre_encoder, Encoder}|Rest] = Options, Config) when is_function(Encoder, 1) ->
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case Config#config.pre_encode of
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false -> parse_config(Rest, Config#config{pre_encode=Encoder})
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; _ -> erlang:error(badarg, [Options, Config])
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end;
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parse_config([loose_unicode|Rest], Config) ->
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parse_config(Rest, Config#config{replaced_bad_utf8=true});
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parse_config([escape_forward_slash|Rest], Config) ->
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parse_config(Rest, Config#config{escaped_forward_slashes=true});
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parse_config([single_quotes|Rest], Config) ->
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parse_config(Rest, Config#config{single_quoted_strings=true});
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parse_config([no_jsonp_escapes|Rest], Config) ->
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parse_config(Rest, Config#config{unescaped_jsonp=true});
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parse_config([json_escape|Rest], Config) ->
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parse_config(Rest, Config#config{escaped_strings=true});
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parse_config([ignore_bad_escapes|Rest], Config) ->
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parse_config(Rest, Config#config{ignored_bad_escapes=true});
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parse_config(Options, Config) ->
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erlang:error(badarg, [Options, Config]).
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config_to_list(Config) ->
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lists:map(
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fun ({pre_encode, F}) -> {pre_encode, F};
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({error_handler, F}) -> {error_handler, F};
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({incomplete_handler, F}) -> {incomplete_handler, F};
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({Key, true}) -> Key
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end,
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lists:filter(
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fun({_, false}) -> false; (_) -> true end,
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lists:zip(record_info(fields, config), tl(tuple_to_list(Config)))
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)
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).
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valid_flags() ->
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[
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replaced_bad_utf8,
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escaped_forward_slashes,
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single_quoted_strings,
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unescaped_jsonp,
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comments,
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escaped_strings,
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dirty_strings,
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ignored_bad_escapes,
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explicit_end,
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relax,
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pre_encode,
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error_handler,
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incomplete_handler,
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%% deprecated flags
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pre_encoder, %% pre_encode
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loose_unicode, %% replaced_bad_utf8
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escape_forward_slash, %% escaped_forward_slashes
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single_quotes, %% single_quoted_strings
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no_jsonp_escapes, %% unescaped_jsonp
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json_escape, %% escaped_strings
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ignore_bad_escapes %% ignored_bad_escapes
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].
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extract_config(Config) ->
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extract_parser_config(Config, []).
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extract_parser_config([], Acc) -> Acc;
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extract_parser_config([{K,V}|Rest], Acc) ->
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case lists:member(K, valid_flags()) of
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true -> extract_parser_config(Rest, [{K,V}] ++ Acc)
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; false -> extract_parser_config(Rest, Acc)
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end;
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extract_parser_config([K|Rest], Acc) ->
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case lists:member(K, valid_flags()) of
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true -> extract_parser_config(Rest, [K] ++ Acc)
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; false -> extract_parser_config(Rest, Acc)
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end.
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%% eunit tests
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-ifdef(TEST).
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-include_lib("eunit/include/eunit.hrl").
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config_test_() ->
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[
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{"all flags",
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?_assertEqual(
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#config{
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replaced_bad_utf8=true,
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escaped_forward_slashes=true,
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explicit_end=true,
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single_quoted_strings=true,
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unescaped_jsonp=true,
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comments=true,
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dirty_strings=true,
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ignored_bad_escapes=true
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},
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parse_config([
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replaced_bad_utf8,
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escaped_forward_slashes,
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explicit_end,
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single_quoted_strings,
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unescaped_jsonp,
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comments,
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dirty_strings,
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ignored_bad_escapes
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])
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)
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},
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{"relax flag",
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?_assertEqual(
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#config{
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replaced_bad_utf8=true,
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single_quoted_strings=true,
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comments=true,
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ignored_bad_escapes=true
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},
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parse_config([relax])
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)
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},
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{"deprecated flags", ?_assertEqual(
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#config{
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pre_encode=fun lists:length/1,
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replaced_bad_utf8=true,
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escaped_forward_slashes=true,
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single_quoted_strings=true,
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unescaped_jsonp=true,
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escaped_strings=true,
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ignored_bad_escapes=true
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},
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parse_config([
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{pre_encoder, fun lists:length/1},
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loose_unicode,
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escape_forward_slash,
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single_quotes,
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no_jsonp_escapes,
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json_escape,
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ignore_bad_escapes
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])
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)},
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{"pre_encode flag", ?_assertEqual(
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#config{pre_encode=fun lists:length/1},
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parse_config([{pre_encode, fun lists:length/1}])
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)},
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{"two pre_encoders defined", ?_assertError(
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badarg,
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parse_config([
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{pre_encode, fun(_) -> true end},
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{pre_encode, fun(_) -> false end}
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])
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)},
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{"error_handler flag", ?_assertEqual(
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#config{error_handler=fun ?MODULE:fake_error_handler/3},
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parse_config([{error_handler, fun ?MODULE:fake_error_handler/3}])
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)},
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{"two error_handlers defined", ?_assertError(
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badarg,
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parse_config([
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{error_handler, fun(_) -> true end},
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{error_handler, fun(_) -> false end}
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])
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)},
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{"incomplete_handler flag", ?_assertEqual(
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#config{incomplete_handler=fun ?MODULE:fake_error_handler/3},
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parse_config([{incomplete_handler, fun ?MODULE:fake_error_handler/3}])
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)},
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{"two incomplete_handlers defined", ?_assertError(
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badarg,
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parse_config([
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{incomplete_handler, fun(_) -> true end},
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{incomplete_handler, fun(_) -> false end}
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])
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)},
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{"bad option flag", ?_assertError(badarg, parse_config([error]))}
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].
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config_to_list_test_() ->
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[
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{"empty config", ?_assertEqual(
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[],
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config_to_list(#config{})
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)},
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{"all flags", ?_assertEqual(
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[
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replaced_bad_utf8,
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escaped_forward_slashes,
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single_quoted_strings,
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unescaped_jsonp,
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comments,
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dirty_strings,
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ignored_bad_escapes,
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explicit_end
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],
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config_to_list(
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#config{
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replaced_bad_utf8=true,
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escaped_forward_slashes=true,
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explicit_end=true,
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single_quoted_strings=true,
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unescaped_jsonp=true,
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comments=true,
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dirty_strings=true,
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ignored_bad_escapes=true
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}
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)
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)},
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{"pre_encode", ?_assertEqual(
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[{pre_encode, fun lists:length/1}],
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config_to_list(#config{pre_encode=fun lists:length/1})
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)},
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{"error handler", ?_assertEqual(
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[{error_handler, fun ?MODULE:fake_error_handler/3}],
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config_to_list(#config{error_handler=fun ?MODULE:fake_error_handler/3})
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)},
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{"incomplete handler", ?_assertEqual(
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[{incomplete_handler, fun ?MODULE:fake_error_handler/3}],
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config_to_list(#config{incomplete_handler=fun ?MODULE:fake_error_handler/3})
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)}
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].
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fake_error_handler(_, _, _) -> ok.
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-endif.
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