33 lines
1.1 KiB
Erlang
33 lines
1.1 KiB
Erlang
%%--------------------------------------------------------------------
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%% Copyright (c) 2023 EMQ Technologies Co., Ltd. All Rights Reserved.
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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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%%--------------------------------------------------------------------
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-module(emqx_rule_funcs_demo).
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-export([
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is_my_topic/1,
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duplicate_payload/2
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]).
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%% check if the topic is of 5 levels.
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is_my_topic(Topic) ->
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emqx_topic:levels(Topic) =:= 5.
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%% duplicate the payload, but only supports 2 or 3 copies.
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duplicate_payload(Payload, 2) ->
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[Payload, Payload];
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duplicate_payload(Payload, 3) ->
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[Payload, Payload, Payload].
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