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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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-module(msmp_binary_resultset_row). |
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-export([decode/1]). |
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-include_lib("kernel/include/logger.hrl"). |
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packet_header() -> |
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<<0>>. |
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decode(Definitions) -> |
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fun |
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(Encoded) -> |
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?LOG_DEBUG(#{encoded => Encoded}), |
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(scran_sequence:combined_with( |
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scran_result:into_map( |
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scran_sequence:sequence( |
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[scran_result:kv( |
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action, |
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scran_combinator:value( |
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binary_resultset_row, |
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scran_bytes:tag(packet_header()))), |
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scran_result:kv( |
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null_bitmap, |
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msmp_null_bitmap:decode(length(Definitions), 2))])), |
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fun |
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(#{null_bitmap := Nulls}) -> |
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scran_result:into_map( |
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scran_sequence:sequence( |
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[scran_result:kv( |
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row, |
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scran_sequence:sequence( |
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lists:filtermap( |
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fun |
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({Definition, false}) -> |
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{true, msmp_binary:decode(Definition)}; |
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({_, true}) -> |
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{true, scran_combinator:success(null)} |
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end, |
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lists:zip(Definitions, Nulls))))])) |
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end))(Encoded) |
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end. |