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phoenix_swagger

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PhoenixSwagger is the library that provides swagger integration to the phoenix web framework.

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phoenix_swagger lib phoenix_swagger plug validate_plug.ex
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lib/phoenix_swagger/plug/validate_plug.ex 

defmodule PhoenixSwagger.Plug.Validate do

  import Plug.Conn

  alias PhoenixSwagger.Validator



  @table :validator_table



  def init(opts), do: opts



  def call(conn, _data) do

    req_path = Enum.filter(:ets.tab2list(@table), fn({path, _}) ->

      equal_paths(path, String.split(path, "/") |> tl, conn.path_info |> tl) != []

    end)

    case req_path do

      [] -> conn

      [{path, _}] ->

        case Validator.validate(path, conn.params) do

          :ok -> conn

          {:error, error, path} ->

            send_resp(conn, 400, %{"error" => %{"message" => error, "path" => path}} |> Poison.encode |> elem(1))

            |> halt()

        end

    end

  end



  defp equal_paths(_, [], req) when length(req) > 0, do: []

  defp equal_paths(_, orig, []) when length(orig) > 0, do: []

  defp equal_paths(orig_path, [], []), do: orig_path

  defp equal_paths(orig_path, [orig | orig_path_rest], [ req | req_path_rest]) do

    if (String.codepoints(orig) |> hd) == "{" or orig == req do

      equal_paths(orig_path, orig_path_rest, req_path_rest)

    else

      []

    end

  end

end