From 93e494ec212b5bb6aae31a3b43304ed230d095e2 Mon Sep 17 00:00:00 2001 From: lain Date: Fri, 10 Jul 2020 14:10:44 +0200 Subject: [PATCH] ActivityPub: Don't rename a clashing nickname with the same ap id. --- lib/pleroma/web/activity_pub/activity_pub.ex | 23 +++++++++-- test/web/activity_pub/activity_pub_test.exs | 42 ++++++++++++++++++++ 2 files changed, 61 insertions(+), 4 deletions(-) diff --git a/lib/pleroma/web/activity_pub/activity_pub.ex b/lib/pleroma/web/activity_pub/activity_pub.ex index 8da5cf938..bc7b5d95a 100644 --- a/lib/pleroma/web/activity_pub/activity_pub.ex +++ b/lib/pleroma/web/activity_pub/activity_pub.ex @@ -1376,13 +1376,28 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do end end - def maybe_handle_clashing_nickname(nickname) do - with %User{} = old_user <- User.get_by_nickname(nickname) do - Logger.info("Found an old user for #{nickname}, ap id is #{old_user.ap_id}, renaming.") + def maybe_handle_clashing_nickname(data) do + nickname = data[:nickname] + + with %User{} = old_user <- User.get_by_nickname(nickname), + {_, false} <- {:ap_id_comparison, data[:ap_id] == old_user.ap_id} do + Logger.info( + "Found an old user for #{nickname}, the old ap id is #{old_user.ap_id}, new one is #{ + data[:ap_id] + }, renaming." + ) old_user |> User.remote_user_changeset(%{nickname: "#{old_user.id}.#{old_user.nickname}"}) |> User.update_and_set_cache() + else + {:ap_id_comparison, true} -> + Logger.info( + "Found an old user for #{nickname}, but the ap id #{data[:ap_id]} is the same as the new user. Race condition? Not changing anything." + ) + + _ -> + nil end end @@ -1398,7 +1413,7 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do |> User.remote_user_changeset(data) |> User.update_and_set_cache() else - maybe_handle_clashing_nickname(data[:nickname]) + maybe_handle_clashing_nickname(data) data |> User.remote_user_changeset() diff --git a/test/web/activity_pub/activity_pub_test.exs b/test/web/activity_pub/activity_pub_test.exs index b988e4437..1658f20da 100644 --- a/test/web/activity_pub/activity_pub_test.exs +++ b/test/web/activity_pub/activity_pub_test.exs @@ -2056,4 +2056,46 @@ defmodule Pleroma.Web.ActivityPub.ActivityPubTest do assert [%{activity_id: ^id_create}] = Pleroma.ActivityExpiration |> Repo.all() end end + + describe "handling of clashing nicknames" do + test "renames an existing user with a clashing nickname and a different ap id" do + orig_user = + insert( + :user, + local: false, + nickname: "admin@mastodon.example.org", + ap_id: "http://mastodon.example.org/users/harinezumigari" + ) + + %{ + nickname: orig_user.nickname, + ap_id: orig_user.ap_id <> "part_2" + } + |> ActivityPub.maybe_handle_clashing_nickname() + + user = User.get_by_id(orig_user.id) + + assert user.nickname == "#{orig_user.id}.admin@mastodon.example.org" + end + + test "does nothing with a clashing nickname and the same ap id" do + orig_user = + insert( + :user, + local: false, + nickname: "admin@mastodon.example.org", + ap_id: "http://mastodon.example.org/users/harinezumigari" + ) + + %{ + nickname: orig_user.nickname, + ap_id: orig_user.ap_id + } + |> ActivityPub.maybe_handle_clashing_nickname() + + user = User.get_by_id(orig_user.id) + + assert user.nickname == orig_user.nickname + end + end end