ActivityPub: Handle clashing nicknames for the same ap id

If we get a new user (identified by ap_id) that would have the same
nickname as an existing user, give the existing user a nickname that
is prepended with the user id, as this will never clash.

This can happen when a user switches server software and that soft-
ware generates ap ids in a different way.
This commit is contained in:
lain 2020-07-01 12:26:07 +02:00
parent 9cf4bfcd81
commit fedfe8f7d6
2 changed files with 37 additions and 0 deletions

View file

@ -1371,6 +1371,16 @@ def fetch_and_prepare_user_from_ap_id(ap_id) 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.")
old_user
|> User.remote_user_changeset(%{nickname: "#{old_user.id}.#{old_user.nickname}"})
|> User.update_and_set_cache()
end
end
def make_user_from_ap_id(ap_id) do
user = User.get_cached_by_ap_id(ap_id)
@ -1383,6 +1393,8 @@ def make_user_from_ap_id(ap_id) do
|> User.remote_user_changeset(data)
|> User.update_and_set_cache()
else
maybe_handle_clashing_nickname(data[:nickname])
data
|> User.remote_user_changeset()
|> Repo.insert()

View file

@ -597,6 +597,31 @@ test "updates an existing user, if stale" do
refute user.last_refreshed_at == orig_user.last_refreshed_at
end
test "if nicknames clash, the old user gets a prefix with the old id to the nickname" do
a_week_ago = NaiveDateTime.add(NaiveDateTime.utc_now(), -604_800)
orig_user =
insert(
:user,
local: false,
nickname: "admin@mastodon.example.org",
ap_id: "http://mastodon.example.org/users/harinezumigari",
last_refreshed_at: a_week_ago
)
assert orig_user.last_refreshed_at == a_week_ago
{:ok, user} = User.get_or_fetch_by_ap_id("http://mastodon.example.org/users/admin")
assert user.inbox
refute user.id == orig_user.id
orig_user = User.get_by_id(orig_user.id)
assert orig_user.nickname == "#{orig_user.id}.admin@mastodon.example.org"
end
@tag capture_log: true
test "it returns the old user if stale, but unfetchable" do
a_week_ago = NaiveDateTime.add(NaiveDateTime.utc_now(), -604_800)