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# Pleroma: A lightweight social networking server
# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Web.MastodonAPI.AuthController do
use Pleroma.Web, :controller
import Pleroma.Web.ControllerHelper, only: [json_response: 3]
alias Pleroma.Helpers.AuthHelper
alias Pleroma.Helpers.UriHelper
alias Pleroma.User
alias Pleroma.Web.OAuth.App
alias Pleroma.Web.OAuth.Authorization
alias Pleroma.Web.OAuth.Token
alias Pleroma.Web.OAuth.Token.Strategy.Revoke, as: RevokeToken
alias Pleroma.Web.TwitterAPI.TwitterAPI
action_fallback(Pleroma.Web.MastodonAPI.FallbackController)
plug(Pleroma.Web.Plugs.RateLimiter, [name: :password_reset] when action == :password_reset)
@local_mastodon_name "Mastodon-Local"
@doc "GET /web/login"
# Local Mastodon FE login callback action
def login(conn, %{"code" => auth_token} = params) do
with {:ok, app} <- local_mastofe_app(),
{:ok, auth} <- Authorization.get_by_token(app, auth_token),
{:ok, oauth_token} <- Token.exchange_token(app, auth) do
redirect_to =
conn
|> local_mastodon_post_login_path()
|> UriHelper.modify_uri_params(%{"access_token" => oauth_token.token})
conn
|> AuthHelper.put_session_token(oauth_token.token)
|> redirect(to: redirect_to)
else
_ -> redirect_to_oauth_form(conn, params)
end
end
def login(conn, params) do
with %{assigns: %{user: %User{}, token: %Token{app_id: app_id}}} <- conn,
{:ok, %{id: ^app_id}} <- local_mastofe_app() do
redirect(conn, to: local_mastodon_post_login_path(conn))
else
_ -> redirect_to_oauth_form(conn, params)
end
end
defp redirect_to_oauth_form(conn, _params) do
with {:ok, app} <- local_mastofe_app() do
path =
Routes.o_auth_path(conn, :authorize,
response_type: "code",
client_id: app.client_id,
redirect_uri: ".",
scope: Enum.join(app.scopes, " ")
)
redirect(conn, to: path)
end
end
@doc "DELETE /auth/sign_out"
def logout(conn, _) do
conn =
with %{assigns: %{token: %Token{} = oauth_token}} <- conn,
session_token = AuthHelper.get_session_token(conn),
{:ok, %Token{token: ^session_token}} <- RevokeToken.revoke(oauth_token) do
AuthHelper.delete_session_token(conn)
else
_ -> conn
end
redirect(conn, to: "/")
end
@doc "POST /auth/password"
def password_reset(conn, params) do
nickname_or_email = params["email"] || params["nickname"]
TwitterAPI.password_reset(nickname_or_email)
json_response(conn, :no_content, "")
end
defp local_mastodon_post_login_path(conn) do
case get_session(conn, :return_to) do
nil ->
Routes.masto_fe_path(conn, :index, ["getting-started"])
return_to ->
delete_session(conn, :return_to)
return_to
end
end
@spec local_mastofe_app() :: {:ok, App.t()} | {:error, Ecto.Changeset.t()}
def local_mastofe_app do
App.get_or_make(
%{client_name: @local_mastodon_name, redirect_uris: "."},
["read", "write", "follow", "push", "admin"]
)
end
end
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