debianize-mobilizon/lib/web/controllers/auth_controller.ex

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Elixir
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defmodule Mobilizon.Web.AuthController do
use Mobilizon.Web, :controller
alias Mobilizon.Service.Auth.Authenticator
alias Mobilizon.Users
alias Mobilizon.Users.User
require Logger
plug(:put_layout, false)
plug(Ueberauth)
def request(conn, %{"provider" => provider} = _params) do
redirect(conn, to: "/login?code=Login Provider not found&provider=#{provider}")
end
def callback(
%{assigns: %{ueberauth_failure: fails}} = conn,
%{"provider" => provider} = _params
) do
Logger.warn("Unable to login user with #{provider} #{inspect(fails)}")
redirect(conn, to: "/login?code=Error with Login Provider&provider=#{provider}")
end
def callback(
%{assigns: %{ueberauth_auth: %Ueberauth.Auth{strategy: strategy} = auth}} = conn,
_params
) do
email = email_from_ueberauth(auth)
[_, _, _, strategy] = strategy |> to_string() |> String.split(".")
strategy = String.downcase(strategy)
user =
with {:valid_email, false} <- {:valid_email, is_nil(email) or email == ""},
{:error, :user_not_found} <- Users.get_user_by_email(email),
{:ok, %User{} = user} <- Users.create_external(email, strategy) do
user
else
{:ok, %User{} = user} ->
user
{:error, error} ->
{:error, error}
error ->
{:error, error}
end
with %User{} = user <- user,
{:ok, %{access_token: access_token, refresh_token: refresh_token}} <-
Authenticator.generate_tokens(user) do
Logger.info("Logged-in user \"#{email}\" through #{strategy}")
render(conn, "callback.html", %{
access_token: access_token,
refresh_token: refresh_token,
user: user
})
else
err ->
Logger.warn("Unable to login user \"#{email}\" #{inspect(err)}")
redirect(conn, to: "/login?code=Error with Login Provider&provider=#{strategy}")
end
end
# Github only give public emails as part of the user profile,
# so we explicitely request all user emails and filter on the primary one
defp email_from_ueberauth(%Ueberauth.Auth{
strategy: Ueberauth.Strategy.Github,
extra: %Ueberauth.Auth.Extra{raw_info: %{user: %{"emails" => emails}}}
})
when length(emails) > 0,
do: emails |> Enum.find(& &1["primary"]) |> (& &1["email"]).()
defp email_from_ueberauth(%Ueberauth.Auth{
extra: %Ueberauth.Auth.Extra{raw_info: %{user: %{"email" => email}}}
})
when not is_nil(email) and email != "",
do: email
defp email_from_ueberauth(_), do: nil
end