51 lines
1.1 KiB
Elixir
51 lines
1.1 KiB
Elixir
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defmodule Omnibot.Module.GenServer do
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defmacro __using__([]) do
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quote do
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alias Omnibot.Module
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use GenServer
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def start_link(opts) do
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cfg = opts[:cfg]
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state = opts[:state]
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GenServer.start_link(__MODULE__, {cfg, state}, opts)
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end
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def cfg() do
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GenServer.call(__MODULE__, :cfg)
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end
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def state() do
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GenServer.call(__MODULE__, :state)
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end
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def update_state(update) do
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GenServer.cast(__MODULE__, {:state, update})
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end
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## Server callbacks
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@impl GenServer
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def init({cfg, state}) do
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state = state || on_init(cfg)
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{:ok, {cfg, state}}
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end
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@impl GenServer
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def handle_call(:cfg, _from, {cfg, state}) do
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{:reply, cfg, {cfg, state}}
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end
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@impl GenServer
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def handle_call(:state, _from, {cfg, state}) do
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{:reply, state, {cfg, state}}
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end
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@impl GenServer
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def handle_cast({:state, update}, {cfg, state}) do
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{:noreply, {cfg, apply(update, [state])}}
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end
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end
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end
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end
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