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| %% ============================================================================= | ||
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| %% ----------------------------------------------------------------------------- | ||
| %% @doc A utiliy module use to customised the JSON encoding for 3rd-party libs | ||
| %% @doc A utility module use to customised the JSON encoding for 3rd-party libs | ||
| %% e.g. erlang_jose | ||
| %% @end | ||
| %% ----------------------------------------------------------------------------- | ||
| -module(bondy_json). | ||
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| -export([setup/0]). | ||
| %% For backwards compat with jsx lib default | ||
| -define(DEFAULT_FLOAT_FORMAT, [{decimals, 16}]). | ||
| -define(DEFAULT_ENCODE_OPTS, [{float_format, ?DEFAULT_FLOAT_FORMAT}]). | ||
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| -if(?OTP_RELEASE >= 27). | ||
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| -define(IS_UINT(X), (is_integer(X) andalso X >= 0)). | ||
| -define(IS_PNUM(X), (is_number(X) andalso X >= 0)). | ||
| -define(IS_DATETIME(Y, M, D, H, Mi, S), | ||
| ( | ||
| ?IS_UINT(Y) andalso | ||
| ?IS_UINT(M) andalso | ||
| ?IS_UINT(D) andalso | ||
| ?IS_UINT(H) andalso | ||
| ?IS_UINT(Mi) andalso | ||
| ?IS_PNUM(S) | ||
| ) | ||
| ). | ||
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| -define(SECONDS_PER_MINUTE, 60). | ||
| -define(SECONDS_PER_HOUR, 3600). | ||
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| -endif. | ||
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| -type encode_opt() :: {float_format, [float_format()]}. | ||
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| %% idem erlang:float_to_binary/2 options | ||
| -type float_format() :: {scientific, Decimals :: 0..249} | ||
| | {decimals, Decimals :: 0..253} | ||
| | compact | ||
| | short. | ||
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| -export([decode/1]). | ||
| -export([decode/2]). | ||
| -export([encode/1]). | ||
| -export([encode/2]). | ||
| -export([try_decode/1]). | ||
| -export([try_decode/2]). | ||
| -export([validate_opts/1]). | ||
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| %% ============================================================================= | ||
| %% BONDY_CONFIG_MANAGER CALLBACKS | ||
| %% API | ||
| %% ============================================================================= | ||
| -spec encode(any()) -> binary(). | ||
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| encode(Term) -> | ||
| encode(Term, bondy_config:get(json, ?DEFAULT_ENCODE_OPTS)). | ||
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| -spec encode(any(), [encode_opt()]) -> iodata() | binary(). | ||
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| encode(Term, Opts) -> | ||
| FloatOpts = float_opts(validate_opts(Opts)), | ||
| do_encode(Term, FloatOpts). | ||
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| decode(Term) -> | ||
| decode(Term, []). | ||
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| decode(Term, Opts) -> | ||
| do_decode(Term, Opts). | ||
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| try_decode(Term) -> | ||
| try_decode(Term, []). | ||
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| try_decode(Term, Opts) -> | ||
| try | ||
| {ok, decode(Term, Opts)} | ||
| catch | ||
| _:Reason -> | ||
| {error, Reason} | ||
| end. | ||
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| setup() -> | ||
| jose:json_module(?MODULE). | ||
| validate_opts(List) when is_list(List) -> | ||
| lists:map(fun validate_opt/1, List). | ||
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| %% ============================================================================= | ||
| %% JOSE CALLBACKS | ||
| %% PRIVATE | ||
| %% ============================================================================= | ||
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| encode(Bin) -> | ||
| jsone:encode(Bin, [ | ||
| %% @private | ||
| float_opts(Opts) -> | ||
| case lists:keyfind(float_format, 1, Opts) of | ||
| {float_format, FloatOpts} when is_list(FloatOpts) -> | ||
| FloatOpts; | ||
| false -> | ||
| ?DEFAULT_FLOAT_FORMAT | ||
| end. | ||
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| validate_opt({float_format, Opts}) -> | ||
| {float_format, validate_float_opts(Opts)}; | ||
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| validate_opt({datetime_format, _Opts} = Term) -> | ||
| %% TODO | ||
| Term. | ||
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| validate_float_opts(Opts) -> | ||
| lists:map(fun validate_float_opt/1, Opts). | ||
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| validate_float_opt({scientific, Decimals} = Term) | ||
| when is_integer(Decimals), Decimals >= 0, Decimals =< 249 -> | ||
| Term; | ||
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| validate_float_opt({scientific, Decimals}) | ||
| when is_integer(Decimals), Decimals >= 0 -> | ||
| %% Coerce to max | ||
| {scientific, 249}; | ||
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| validate_float_opt({decimals, Decimals} = Term) | ||
| when is_integer(Decimals), Decimals >= 0, Decimals =< 253 -> | ||
| Term; | ||
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| validate_float_opt(compact = Term) -> | ||
| Term; | ||
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| validate_float_opt(short = Term) -> | ||
| Term; | ||
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| validate_float_opt(Arg) -> | ||
| error(badarg, {float_format, Arg}). | ||
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| -if(?OTP_RELEASE >= 27). | ||
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| do_encode(Term, FloatOpts) -> | ||
| json:encode(Term, fun | ||
| (undefined, _Encode) -> | ||
| <<"null">>; | ||
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| (Value, _Encode) when is_float(Value) -> | ||
| float_to_binary(Value, FloatOpts); | ||
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| ({{Y, M, D}, {H, Mi, S}}, _Encode) | ||
| when ?IS_DATETIME(Y, M, D, H, Mi, S) -> | ||
| encode_datetime({{Y, M, D}, {H, Mi, S}}); | ||
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| (Value, Encode) -> | ||
| json:encode_value(Value, Encode) | ||
| end). | ||
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| do_decode(Term, _Opts) -> | ||
| json:decode(Term). | ||
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| -else. | ||
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| do_encode(Term, FloatOpts) -> | ||
| jsone:encode(Term, [ | ||
| undefined_as_null, | ||
| {float_format, FloatOpts}, | ||
| {datetime_format, iso8601}, | ||
| {object_key_type, string} | ||
| ]). | ||
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| do_decode(Term, _Opts) -> | ||
| jsone:decode(Term, [ | ||
| undefined_as_null, | ||
| {object_format, map} | ||
| ]). | ||
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| -endif. | ||
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| -if(?OTP_RELEASE >= 27). | ||
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| %% ============================================================================= | ||
| %% PRIVATE - BORROWED FROM JSONE LIBRARY | ||
| %% | ||
| %% Copyright (c) 2013-2016, Takeru Ohta <[email protected]> | ||
| %% | ||
| %% The MIT License | ||
| %% | ||
| %% 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. | ||
| %% | ||
| %% ============================================================================= | ||
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| -spec encode_datetime(calendar:datetime()) -> iodata(). | ||
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| encode_datetime({{Y, M, D}, {H, Mi, S}}) -> | ||
| [ | ||
| format_year(Y), $-, | ||
| format2digit(M), $-, | ||
| format2digit(D), $T, | ||
| format2digit(H), $:, | ||
| format2digit(Mi), $:, | ||
| format_seconds(S), $Z | ||
| ]. | ||
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| -spec format_year(non_neg_integer()) -> iodata(). | ||
|
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| format_year(Y) when Y > 999 -> | ||
| integer_to_binary(Y); | ||
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| format_year(Y) -> | ||
| B = integer_to_binary(Y), | ||
| [lists:duplicate(4 - byte_size(B), $0) | B]. | ||
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| -spec format2digit(non_neg_integer()) -> iolist(). | ||
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| format2digit(0) -> | ||
| "00"; | ||
| format2digit(1) -> | ||
| "01"; | ||
| format2digit(2) -> | ||
| "02"; | ||
| format2digit(3) -> | ||
| "03"; | ||
| format2digit(4) -> | ||
| "04"; | ||
| format2digit(5) -> | ||
| "05"; | ||
| format2digit(6) -> | ||
| "06"; | ||
| format2digit(7) -> | ||
| "07"; | ||
| format2digit(8) -> | ||
| "08"; | ||
| format2digit(9) -> | ||
| "09"; | ||
| format2digit(X) -> | ||
| integer_to_list(X). | ||
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| -spec format_seconds(non_neg_integer() | float()) -> iolist(). | ||
|
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| format_seconds(S) when is_integer(S) -> | ||
| format2digit(S); | ||
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| format_seconds(S) when is_float(S) -> | ||
| io_lib:format("~6.3.0f", [S]). | ||
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| %% -spec format_tz_(integer()) -> iolist(). | ||
| %% format_tz_(S) -> | ||
| %% H = S div ?SECONDS_PER_HOUR, | ||
| %% S1 = S rem ?SECONDS_PER_HOUR, | ||
| %% M = S1 div ?SECONDS_PER_MINUTE, | ||
| %% [format2digit(H), $:, format2digit(M)]. | ||
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| decode(Bin) -> | ||
| jsone:decode(Bin, [undefined_as_null]). | ||
| -endif. | ||
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