#---
# Excerpted from "Programming Phoenix",
# published by The Pragmatic Bookshelf.
# Copyrights apply to this code. It may not be used to create training material,
# courses, books, articles, and the like. Contact us if you are in doubt.
# We make no guarantees that this code is fit for any purpose.
# Visit http://www.pragmaticprogrammer.com/titles/phoenix for more book information.
#---
defmodule Hello.Web do
  @moduledoc """
  A module that keeps using definitions for controllers,
  views and so on.

  This can be used in your application as:

      use Hello.Web, :controller
      use Hello.Web, :view

  The definitions below will be executed for every view,
  controller, etc, so keep them short and clean, focused
  on imports, uses and aliases.

  Do NOT define functions inside the quoted expressions
  below.
  """

  def model do
    quote do
      use Ecto.Schema

      import Ecto
      import Ecto.Changeset
      import Ecto.Query, only: [from: 1, from: 2]
    end
  end

  def controller do
    quote do
      use Phoenix.Controller

      alias Hello.Repo
      import Ecto
      import Ecto.Query, only: [from: 1, from: 2]

      import Hello.Router.Helpers
      import Hello.Gettext
    end
  end

  def view do
    quote do
      use Phoenix.View, root: "web/templates"

      # Import convenience functions from controllers
      import Phoenix.Controller, only: [get_csrf_token: 0, get_flash: 2, view_module: 1]

      # Use all HTML functionality (forms, tags, etc)
      use Phoenix.HTML

      import Hello.Router.Helpers
      import Hello.ErrorHelpers
      import Hello.Gettext
    end
  end

  def router do
    quote do
      use Phoenix.Router
    end
  end

  def channel do
    quote do
      use Phoenix.Channel

      alias Hello.Repo
      import Ecto
      import Ecto.Query, only: [from: 1, from: 2]
      import Hello.Gettext
    end
  end

  @doc """
  When used, dispatch to the appropriate controller/view/etc.
  """
  defmacro __using__(which) when is_atom(which) do
    apply(__MODULE__, which, [])
  end
end
