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Authentication library for Elixir using Plug
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lib/openmaize/authenticate.ex
defmodule Openmaize.Authenticate do
@moduledoc """
Authenticate the current user, using Plug sessions.
## Options
There are two options:
* repo - the name of the repo
* the default is MyApp.Repo - using the name of the project
* user_model - the name of the user model
* the default is MyApp.User - using the name of the project
## Example using Phoenix
Add the following line to the pipeline in the `web/router.ex` file:
plug Openmaize.Authenticate
"""
import Plug.Conn
@behaviour Plug
def init(opts) do
{Keyword.get(opts, :repo, Openmaize.Utils.default_repo),
Keyword.get(opts, :user_model, Openmaize.Utils.default_user_model)}
end
@doc """
Authenticate the current user.
"""
def call(conn, {repo, user_model}) do
get_session(conn, :user_id) |> get_user(conn, repo, user_model)
end
defp get_user(nil, conn, _, _), do: assign(conn, :current_user, nil)
defp get_user(id, conn, repo, user_model) do
repo.get(user_model, id) |> set_current_user(conn)
end
defp set_current_user(nil, conn), do: assign(conn, :current_user, nil)
defp set_current_user(user, conn), do: assign(conn, :current_user, user)
end