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0.1.0
Spawn Elixir SDK is the support library for the Spawn Actors System
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lib/defact.ex
defmodule SpawnSdk.Defact do
@moduledoc """
Define actions like a Elixir functions
### Internal :defact_exports metadata saved as
[
{action_name, %{timer: 10_000}},
{action_name2, %{timer: nil}}
]
"""
defmacro __using__(_args) do
quote do
import SpawnSdk.Defact
Module.register_attribute(__MODULE__, :defact_exports, accumulate: true)
@set_timer nil
end
end
defmacro defact(call, do: block) do
define_defact(:def, call, block, __CALLER__)
end
defp define_defact(kind, call, block, env) do
{name, args} = decompose_call!(kind, call, env)
[first_arg, last_arg] = args
quote do
Module.put_attribute(
__MODULE__,
:defact_exports,
Macro.escape({unquote(name), %{timer: @set_timer}})
)
def handle_command({unquote(name), unquote(first_arg)}, unquote(last_arg)) do
unquote(block)
end
end
end
defp decompose_call!(kind, {:when, _, [call, _guards]}, env),
do: decompose_call!(kind, call, env)
defp decompose_call!(_kind, {{:unquote, _, [name]}, _, args}, _env) do
{name, args}
end
defp decompose_call!(kind, call, env) do
case Macro.decompose_call(call) do
{name, args} ->
{name, args}
:error ->
compile_error!(
env,
"first argument of #{kind}n must be a call, got: #{Macro.to_string(call)}"
)
end
end
defp compile_error!(env, description) do
raise CompileError, line: env.line, file: env.file, description: description
end
end