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REST-like API micro-framework for elixir inspired by grape.
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lib/maru/builder/versioning.ex
defmodule Maru.Builder.Versioning do
@moduledoc """
Base versioning adapter with default functions.
"""
defmacro __using__(_) do
quote do
@doc false
def get_version_plug(_opts), do: []
@doc false
def put_version_plug(_version), do: []
@doc false
def path_for_params(path, _version) do
Enum.filter(path, fn
{:version} -> false
_ -> true
end)
end
@doc false
def conn_for_match(method, version, path) do
quote do
%Plug.Conn{
method: unquote(method),
path_info: unquote(path_for_match(path)),
private: %{
maru_version: unquote(version),
}
}
end
end
defp path_for_match(path) do
Enum.filter_map(
path,
fn {:version} -> false
_ -> true
end,
fn x when is_atom(x) -> Macro.var(:_, nil)
x -> x
end
)
end
defoverridable [
get_version_plug: 1,
put_version_plug: 1,
path_for_params: 2,
conn_for_match: 3,
path_for_match: 1,
]
end
end
@doc "return adapter by versioning strategy."
def get_adapter(nil), do: Maru.Builder.Versioning.None
def get_adapter(:path), do: Maru.Builder.Versioning.Path
def get_adapter(:accept_version_header), do: Maru.Builder.Versioning.AcceptVersionHeader
def get_adapter(:param), do: Maru.Builder.Versioning.Parameter
def get_adapter(strategy) do
IO.write :stderr, "Unsupported versioning strategy: #{strategy}, Ignore."
Maru.Builder.Versioning.None
end
end