defmodule UltraPlug.Render do
  @moduledoc """
  Renders the template.

  ## Options

  - **template:** defaults to "index.html".
  - **assigns:** overrides conn.assigns in Phoenix.
  - **render:** defaults to [Phoenix.Controller.render/3](https://hexdocs.pm/phoenix/Phoenix.Controller.html#render/3).
  """

  use UltraPlug, return_error_as_tuple: true

  def init(opts) do
    %{
      template: Keyword.get(opts, :template, "index.html"),
      assigns: Keyword.get(opts, :assigns, %{}),
      render: Keyword.get(opts, :render, &Phoenix.Controller.render/3)
    }
  end

  def call(conn, %{template: template, assigns: assigns, render: render}) do
    render.(conn, template, assigns)
  end
end