defmodule GSMLG.Socket.Helpers do
defmacro __using__(_opts) do
quote do
import GSMLG.Socket.Helpers
end
end
defmacro defbang({name, _, args}) do
args = if is_list(args), do: args, else: []
quote bind_quoted: [name: Macro.escape(name), args: Macro.escape(args)] do
def unquote((to_string(name) <> "!") |> String.to_atom())(unquote_splicing(args)) do
case unquote(name)(unquote_splicing(args)) do
:ok ->
:ok
{:ok, result} ->
result
{:error, reason} ->
raise GSMLG.Socket.Error, reason: reason
end
end
end
end
defmacro defbang({name, _, args}, to: mod) do
args = if is_list(args), do: args, else: []
quote bind_quoted: [
mod: Macro.escape(mod),
name: Macro.escape(name),
args: Macro.escape(args)
] do
def unquote((to_string(name) <> "!") |> String.to_atom())(unquote_splicing(args)) do
case unquote(mod).unquote(name)(unquote_splicing(args)) do
:ok ->
:ok
{:ok, result} ->
result
{:error, reason} ->
raise GSMLG.Socket.Error, reason: reason
end
end
end
end
defmacro defwrap({name, _, [self | args]}, options \\ []) do
if instance = options[:to] do
quote bind_quoted: [
name: Macro.escape(name),
self: Macro.escape(self),
args: Macro.escape(args),
instance: Macro.escape(instance),
field: options[:field] || :socket
] do
def unquote(name)(unquote(self), unquote_splicing(args)) do
unquote(self).unquote(field)
|> @protocol.unquote(instance).unquote(name)(unquote_splicing(args))
end
end
else
quote bind_quoted: [
name: Macro.escape(name),
self: Macro.escape(self),
args: Macro.escape(args),
field: options[:field] || :socket
] do
def unquote(name)(unquote(self), unquote_splicing(args)) do
unquote(self).unquote(field) |> @protocol.unquote(name)(unquote_splicing(args))
end
end
end
end
defmacro definvalid({name, _, args}) do
args =
if args |> is_list do
for {_, meta, context} <- args do
{:_, meta, context}
end
else
[]
end
quote do
def unquote(name)(unquote_splicing(args)) do
{:error, :einval}
end
end
end
end