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%% Copyright (c) 2023 Peter Morgan <peter.james.morgan@gmail.com> |
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%% |
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%% Licensed under the Apache License, Version 2.0 (the "License"); |
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%% you may not use this file except in compliance with the License. |
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%% You may obtain a copy of the License at |
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%% |
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%% http://www.apache.org/licenses/LICENSE-2.0 |
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%% |
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%% Unless required by applicable law or agreed to in writing, software |
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%% distributed under the License is distributed on an "AS IS" BASIS, |
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%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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%% See the License for the specific language governing permissions and |
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%% limitations under the License. |
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%% @doc Encoder combinators that operate on sequences of output. |
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-module(narcs_sequence). |
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-export([sequence/1]). |
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-export([sequence/2]). |
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-spec sequence([narcs:encoder()]) -> narcs:encoder(). |
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%% @doc Encode each step in sequence. |
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sequence(Steps) -> |
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fun |
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(Decoded) when is_map(Decoded) -> |
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[Step(Decoded) || Step <- Steps] |
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end. |
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-spec sequence(narcs:encoder(), narcs:encoder()) -> narcs:encoder(). |
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%% @doc Output a map, encoding each key and value. |
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sequence(KeyEncoder, ValueEncoder) -> |
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fun |
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(Decoded) when is_map(Decoded) -> |
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maps:fold( |
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fun |
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(Key, Value, A) -> |
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[KeyEncoder(Key), ValueEncoder(Value) | A] |
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end, |
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[], |
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Decoded) |
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end. |