defmodule ElixirScript.ModuleSystems.ES do

@moduledoc false

alias ESTree.Tools.Builder, as: JS

def build(js_imports, body, exports) do

imports = js_imports

|> Enum.filter(fn

{_module, _name, nil, _import_path} -> false

_ -> true

end)

|> Enum.map(fn

{_module, name, _path, import_path} -> import_module(name, import_path)

end)

export = if is_nil(exports), do: [], else: [export_module(exports)]

imports ++ body ++ export

end

def build_imports(js_imports) do

js_imports

|> Enum.map(fn

{_module, name, _path, import_path} -> import_module(name, import_path)

end)

end

def build_export(exports) do

if is_nil(exports), do: [], else: [export_module(exports)]

end

defp import_module(import_name, from) do

js_module_name = JS.identifier(import_name)

import_specifier = JS.import_default_specifier(

js_module_name

)

do_import_module([import_specifier], from)

end

defp do_import_module(import_specifiers, file_path) do

JS.import_declaration(

import_specifiers,

JS.literal(file_path)

)

end

defp export_module(exported_object) do

JS.export_default_declaration(exported_object)

end

end