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extreme

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Elixir TCP client for EventStore.

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extreme lib response.ex
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lib/response.ex 

defmodule Extreme.Response do

  require Logger

  alias Extreme.Msg, as: ExMsg



  def parse(<<message_type,

              auth,

              correlation_id :: 16-binary,

              data :: binary>>) do

    case Extreme.MessageResolver.decode_cmd(message_type) do

      :not_authenticated         -> {:error, :not_authenticated, correlation_id}

      :heartbeat_request_command -> {:heartbeat_request, correlation_id}

      :pong                      -> {:pong, correlation_id}

      response_struct            ->

        data = response_struct.decode data

        {auth, correlation_id, data}

    end

  end



  def reply(%{result: :Success} = data, _correlation_id),               do: {:ok, data}

  def reply(%ExMsg.SubscriptionConfirmation{} = data, _correlation_id), do: {:ok, data}

  def reply(%ExMsg.PersistentSubscriptionConfirmation{} = data, _correlation_id), do: {:ok, data}

  #def reply(%ExMsg.SubscriptionDropped{} = data, _correlation_id),     do: {:ok, data}

  def reply(%ExMsg.StreamEventAppeared{} = data, _correlation_id),      do: {:ok, data}

  def reply(%ExMsg.PersistentSubscriptionStreamEventAppeared{} = data, correlation_id), do: {:ok, data, correlation_id}

  def reply(%{result: _} = data, _correlation_id),                      do: {:error, data.result, data}

  def reply({:error, reason}, _correlation_id),                         do: {:error, reason}

  def reply(1, _correlation_id),                                        do: Logger.debug "HEARTBEAT"

  def reply(response, _correlation_id) do

    Logger.error "Unhandled response: #{inspect response}"

    {:error, :unhandled_response_type, response}

  end

end