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event_hub

1.0.0
1.0.2 1.0.1 1.0.0

Event-Hub is a Gleam library that provides simple hubs with publishers and subscribers for event-driven observers. It supports asynchronous message handling and event notifications, decoupling components efficiently. It works on Erlang and JavaScript.

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event_hub src event_hub.erl
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src/event_hub.erl 

-module(event_hub).

-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch]).



-export([new/1, notify/2, subscribe/2]).

-export_type([hub/1]).



-type hub(FXZ) :: any() | {gleam_phantom, FXZ}.



-spec new(fun((hub(any())) -> FYO)) -> FYO.

new(Context) ->

    Hub = event_hub_ffi:start_stateless(),

    Result = Context(Hub),

    event_hub_ffi:stop_stateless(Hub),

    Result.



-spec notify(hub(FYP), FYP) -> nil.

notify(Hub, Value) ->

    event_hub_ffi:invoke_stateless(Hub, Value).



-spec subscribe(hub(FYR), fun((FYR) -> nil)) -> fun(() -> nil).

subscribe(Hub, Callback) ->

    Index = event_hub_ffi:add_stateless(Hub, Callback),

    fun() -> event_hub_ffi:remove_stateless(Hub, Index) end.