Packages
mazurka
0.3.5
1.0.8
1.0.7
1.0.6
1.0.5
1.0.4
1.0.3
1.0.2
1.0.1
1.0.0
0.3.39
0.3.38
0.3.37
0.3.36
0.3.35
0.3.34
0.3.33
0.3.32
0.3.31
0.3.30
0.3.29
0.3.28
0.3.27
0.3.26
0.3.25
0.3.24
0.3.23
0.3.22
0.3.21
0.3.20
0.3.19
0.3.18
0.3.17
0.3.16
0.3.15
0.3.14
0.3.13
0.3.12
0.3.11
0.3.10
0.3.9
0.3.8
0.3.7
0.3.6
0.3.5
0.3.4
0.3.3
0.3.2
0.3.1
0.3.0
0.2.10
0.2.9
0.2.8
0.2.7
0.2.6
0.2.5
0.2.4
0.2.3
0.2.2
0.2.1
0.2.0
0.1.10
0.1.9
0.1.8
0.1.7
0.1.6
0.1.5
0.1.4
0.1.3
0.1.2
0.1.1
0.1.0
hypermedia api toolkit
Current section
Files
Jump to
Current section
Files
lib/mazurka/dispatch.ex
defmodule Mazurka.Dispatch do
alias Mazurka.Compiler.Utils
defmacro __using__(_opts) do
quote do
import Mazurka.Dispatch
@before_compile Mazurka.Dispatch
defmacro __using__(_) do
dispatch = __MODULE__
quote do
def call(conn, opts) do
conn = conn
|> Plug.Conn.put_private(:mazurka_dispatch, unquote(dispatch))
|> Plug.Conn.put_private(:mazurka_router, __MODULE__)
super(conn, opts)
end
end
end
use Mazurka.Dispatch.BuiltIn
def resolve(module, function, arguments, conn, parent, ref, attrs) do
exec(module, function, arguments, conn, parent, ref, attrs)
end
end
end
defmacro __before_compile__(_) do
quote do
defp exec(module, function, args, %{private: %{mazurka_dispatch: dispatch}}, _parent, _ref, _attrs) do
raise %Mazurka.Dispatch.Exception{module: module, function: function, arity: length(args), dispatch: dispatch}
end
end
end
defmacro env(_env, [do: _block]) do
nil
end
defmacro service(definition) do
quote do
service unquote(definition), do: []
end
end
defmacro service(definition, [do: _] = do_block) do
case unescape(definition, __CALLER__) do
{module, function, arity} ->
args = gen_pos_args(arity)
quote do
service unquote(definition), unquote(module).unquote(function)(unquote_splicing(args)), unquote(do_block)
end
_ ->
quote do
service unquote(definition), unquote(definition), unquote(do_block)
end
end
end
defmacro service(source, target) do
quote do
service unquote(source), unquote(target), do: []
end
end
defmacro service(source, target, [do: _middleware]) do
case {unescape(source, __CALLER__), unescape(target, __CALLER__)} do
{{s_module, s_function, s_arity}, {t_module, t_function, t_args}} ->
s_args = gen_args(s_arity)
quote do
defp exec(unquote(s_module), unquote(s_function), unquote(s_args), var!(_conn), var!(_parent), var!(_ref), var!(_attrs)) do
unquote(t_module).unquote(t_function)(unquote_splicing(t_args))
end
end
{s_module, t_module} ->
quote do
defp exec(unquote(s_module), function, args, var!(_conn), var!(_parent), var!(_ref), var!(_attrs)) do
apply(unquote(t_module), function, args)
end
end
end
end
defp gen_args(arity) do
:lists.seq(1, arity)
|> Enum.map(&var/1)
end
defp gen_pos_args(arity) do
:lists.seq(1, arity)
|> Enum.map(fn(i) ->
{:&, [], [i]}
end)
end
defp unescape({:/, _, [{{:., _, [module, function]}, _, _}, arity]}, caller) do
module = Utils.eval(module, caller)
function = Utils.eval(function, caller)
{module, function, arity}
end
defp unescape({:__aliases__, _, _} = module, caller) do
Utils.eval(module, caller)
end
defp unescape({{:., _meta, [module, function]}, _, args}, caller) do
module = Utils.eval(module, caller)
function = Utils.eval(function, caller)
args = Enum.map(args, fn
({:&, _, [item]}) ->
var(item)
({:self, _, _}) ->
Macro.var(:_self, nil)
({:conn, _, _}) ->
Macro.var(:_conn, nil)
({:ref, _, _}) ->
Macro.var(:_ref, nil)
({:env, _, _}) ->
quote do
var!(_conn).private[:mazurka_env] || :prod
end
(other) ->
Utils.eval(other, caller) |> Macro.escape
end)
{module, function, args}
end
defp var(i) do
"_arg_#{i}"
|> String.to_atom
|> Macro.var(nil)
end
end