defmodule MessengerBot.Payload.MessageRequest do
  @moduledoc """
  Request struct
  """

  @derive [Poison.Encoder]
  defstruct [:recipient, :message, :sender_action, :notification_type, :tag]

  @type t :: %__MODULE__{
    recipient: Map.t,
    message: Map.t,
    sender_action: String.t,
    notification_type: String.t,
    tag: String.t
  }

  @doc """
  Build struct for message
  """
  def message(%{} = recipient, %{} = message, notification_type \\ nil) do
    %__MODULE__{recipient: recipient, message: message,
      notification_type: notification_type}
  end

  @doc """
  Build struct for typing on
  """
  def typing_on(%{} = recipient) do
    %__MODULE__{recipient: recipient, sender_action: "typing_on"}
  end

  @doc """
  Build struct for typing off
  """
  def typing_off(%{} = recipient) do
    %__MODULE__{recipient: recipient, sender_action: "typing_off"}
  end

  @doc """
  Build struct for mark seen
  """
  def mark_seen(%{} = recipient) do
    %__MODULE__{recipient: recipient, sender_action: "mark_seen"}
  end
end