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macula
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7.0.0
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5.2.2
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5.2.0
5.1.0
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4.8.0
4.7.1
4.7.0
4.6.0
4.5.0
4.4.10
4.4.9
4.4.8
4.4.7
4.4.6
4.4.5
4.4.4
4.4.3
4.4.2
4.4.1
4.4.0
4.3.1
4.3.0
4.2.9
4.2.8
4.2.7
4.2.6
4.2.5
4.2.4
4.2.3
4.2.2
4.2.1
4.2.0
4.1.1
4.1.0
4.0.0
3.16.0
3.15.3
3.15.2
3.15.1
3.14.0
3.13.0
3.12.1
3.12.0
3.11.1
3.11.0
3.10.3
3.10.2
3.10.1
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3.8.0
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3.3.0
3.2.0
3.1.0
3.0.0
2.1.1
2.1.0
2.0.0
1.5.2
1.5.1
1.4.30
1.4.29
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1.4.26
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1.4.14
1.4.13
1.4.11
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1.4.9
1.4.8
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1.4.6
1.4.5
1.4.4
1.4.3
1.4.2
1.4.1
1.4.0
1.3.1
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1.0.10
1.0.9
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1.0.5
1.0.4
1.0.3
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1.0.1
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0.48.6
0.48.5
0.48.4
0.48.3
0.48.2
0.48.1
0.48.0
0.47.1
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0.46.3
0.46.1
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0.45.0
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0.44.1
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0.43.3
0.43.2
0.43.1
0.43.0
0.42.9
0.42.8
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0.42.6
0.42.5
0.42.4
0.42.3
0.42.2
0.42.1
0.42.0
0.41.1
0.41.0
0.40.1
0.40.0
0.39.9
0.39.8
0.39.7
0.39.6
0.39.5
0.39.4
0.39.3
0.39.2
0.39.1
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0.38.8
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0.38.6
0.38.5
0.38.4
0.38.3
0.38.2
0.38.1
0.38.0
0.37.7
0.37.6
0.37.5
0.37.4
0.37.3
0.37.2
0.37.1
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0.36.6
0.36.5
0.36.4
0.36.3
0.36.2
0.36.1
0.36.0
0.35.4
0.35.3
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0.35.1
0.35.0
0.34.1
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0.33.1
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0.32.5
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0.32.0
0.31.9
0.31.8
0.31.7
0.31.6
0.31.5
0.31.4
0.31.3
0.31.2
0.31.1
0.31.0
0.30.10
0.30.9
0.30.8
0.30.7
0.30.6
0.30.5
0.30.4
0.30.3
0.30.2
0.30.1
0.30.0
0.29.0
0.28.3
0.28.2
0.28.1
0.28.0
0.27.1
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0.26.1
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0.25.6
0.25.5
0.25.4
0.25.3
0.25.2
0.25.1
0.25.0
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0.24.4
0.24.3
0.24.2
0.24.1
0.24.0
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0.23.1
0.23.0
0.22.12
0.22.11
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0.22.9
0.22.8
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0.22.6
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0.22.3
0.22.2
0.22.1
0.22.0
0.21.7
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0.21.1
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0.20.25
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0.20.0
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0.19.1
0.19.0
0.18.1
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0.17.4
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0.16.6
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0.16.0
0.15.1
0.15.0
0.14.3
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0.14.1
0.14.0
0.12.6
0.12.5
0.12.3
0.11.3
0.10.2
0.10.1
0.10.0
0.9.2
0.9.1
0.9.0
0.8.25
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0.8.22
0.8.21
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0.8.9
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0.6.1
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0.5.0
0.4.4
0.4.3
0.4.2
0.4.1
0.4.0
0.3.4
0.3.3
0.3.2
0.3.1
Macula HTTP/3 Mesh SDK — connect, subscribe, publish, call, advertise
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Files
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Files
src/macula_rpc_system/macula_rpc_service_interests.erl
%%%-------------------------------------------------------------------
%%% @doc
%%% RPC Service Interests Module (Pull-based Discovery)
%%%
%%% Handles pull-based service discovery configuration:
%%% - Normalizes service interest lists (atoms, binaries, strings)
%%% - Validates service interest inputs
%%% - Prepares DHT lookup messages for prefetching
%%%
%%% Extracted from macula_rpc_handler.erl (Dec 2025) to improve testability
%%% and separation of concerns.
%%% @end
%%%-------------------------------------------------------------------
-module(macula_rpc_service_interests).
-include_lib("kernel/include/logger.hrl").
%% API
-export([
normalize/1,
normalize_single/1,
create_find_value_message/1,
log_interests/1,
merge_interests/2
]).
%%%===================================================================
%%% API
%%%===================================================================
%% @doc Normalize service interests to list of binaries.
%% Accepts various input formats: list of binaries/atoms/strings, or single value.
-spec normalize(term()) -> [binary()].
normalize(Interests) when is_list(Interests) ->
lists:filtermap(fun normalize_single/1, Interests);
normalize(Interest) when is_binary(Interest), byte_size(Interest) > 0 ->
[Interest];
normalize(Interest) when is_atom(Interest), Interest =/= undefined ->
[atom_to_binary(Interest, utf8)];
normalize(Interest) when is_list(Interest) ->
%% Could be a string
case io_lib:printable_list(Interest) of
true -> [list_to_binary(Interest)];
false -> []
end;
normalize(_) ->
[].
%% @doc Normalize a single service interest to binary.
%% Returns {true, Binary} for valid inputs, false for invalid.
-spec normalize_single(term()) -> {true, binary()} | false.
normalize_single(Interest) when is_binary(Interest), byte_size(Interest) > 0 ->
{true, Interest};
normalize_single(Interest) when is_atom(Interest), Interest =/= undefined ->
{true, atom_to_binary(Interest, utf8)};
normalize_single(Interest) when is_list(Interest), Interest =/= [] ->
case io_lib:printable_list(Interest) of
true -> {true, list_to_binary(Interest)};
false -> false
end;
normalize_single(_) ->
false.
%% @doc Create a FIND_VALUE message for a service.
%% Returns the service key and encoded message ready to send.
-spec create_find_value_message(binary()) -> {binary(), map()}.
create_find_value_message(ServiceName) ->
ServiceKey = crypto:hash(sha256, ServiceName),
FindValueMsg = macula_routing_protocol:encode_find_value(ServiceKey),
{ServiceKey, FindValueMsg}.
%% @doc Log configured service interests during init.
-spec log_interests([binary()]) -> ok.
log_interests([]) ->
ok;
log_interests(Interests) ->
?LOG_INFO("RPC handler configured with ~p service interest(s) for pull-based discovery: ~p",
[length(Interests), Interests]).
%% @doc Merge new interests with existing ones (removes duplicates).
-spec merge_interests([binary()], [binary()]) -> [binary()].
merge_interests(Existing, New) ->
lists:usort(Existing ++ New).