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+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.ActivityPub.Transmogrifier.FollowHandlingTest do
+ use Pleroma.DataCase
+ alias Pleroma.Activity
+ alias Pleroma.Notification
+ alias Pleroma.Repo
+ alias Pleroma.User
+ alias Pleroma.Web.ActivityPub.Transmogrifier
+ alias Pleroma.Web.ActivityPub.Utils
+
+ import Pleroma.Factory
+ import Ecto.Query
+ import Mock
+
+ setup_all do
+ Tesla.Mock.mock_global(fn env -> apply(HttpRequestMock, :request, [env]) end)
+ :ok
+ end
+
+ describe "handle_incoming" do
+ setup do: clear_config([:user, :deny_follow_blocked])
+
+ test "it works for osada follow request" do
+ user = insert(:user)
+
+ data =
+ File.read!("test/fixtures/osada-follow-activity.json")
+ |> Poison.decode!()
+ |> Map.put("object", user.ap_id)
+
+ {:ok, %Activity{data: data, local: false} = activity} = Transmogrifier.handle_incoming(data)
+
+ assert data["actor"] == "https://apfed.club/channel/indio"
+ assert data["type"] == "Follow"
+ assert data["id"] == "https://apfed.club/follow/9"
+
+ activity = Repo.get(Activity, activity.id)
+ assert activity.data["state"] == "accept"
+ assert User.following?(User.get_cached_by_ap_id(data["actor"]), user)
+ end
+
+ test "it works for incoming follow requests" do
+ user = insert(:user)
+
+ data =
+ File.read!("test/fixtures/mastodon-follow-activity.json")
+ |> Poison.decode!()
+ |> Map.put("object", user.ap_id)
+
+ {:ok, %Activity{data: data, local: false} = activity} = Transmogrifier.handle_incoming(data)
+
+ assert data["actor"] == "http://mastodon.example.org/users/admin"
+ assert data["type"] == "Follow"
+ assert data["id"] == "http://mastodon.example.org/users/admin#follows/2"
+
+ activity = Repo.get(Activity, activity.id)
+ assert activity.data["state"] == "accept"
+ assert User.following?(User.get_cached_by_ap_id(data["actor"]), user)
+
+ [notification] = Notification.for_user(user)
+ assert notification.type == "follow"
+ end
+
+ test "with locked accounts, it does create a Follow, but not an Accept" do
+ user = insert(:user, is_locked: true)
+
+ data =
+ File.read!("test/fixtures/mastodon-follow-activity.json")
+ |> Poison.decode!()
+ |> Map.put("object", user.ap_id)
+
+ {:ok, %Activity{data: data, local: false}} = Transmogrifier.handle_incoming(data)
+
+ assert data["state"] == "pending"
+
+ refute User.following?(User.get_cached_by_ap_id(data["actor"]), user)
+
+ accepts =
+ from(
+ a in Activity,
+ where: fragment("?->>'type' = ?", a.data, "Accept")
+ )
+ |> Repo.all()
+
+ assert Enum.empty?(accepts)
+
+ [notification] = Notification.for_user(user)
+ assert notification.type == "follow_request"
+ end
+
+ test "it works for follow requests when you are already followed, creating a new accept activity" do
+ # This is important because the remote might have the wrong idea about the
+ # current follow status. This can lead to instance A thinking that x@A is
+ # followed by y@B, but B thinks they are not. In this case, the follow can
+ # never go through again because it will never get an Accept.
+ user = insert(:user)
+
+ data =
+ File.read!("test/fixtures/mastodon-follow-activity.json")
+ |> Poison.decode!()
+ |> Map.put("object", user.ap_id)
+
+ {:ok, %Activity{local: false}} = Transmogrifier.handle_incoming(data)
+
+ accepts =
+ from(
+ a in Activity,
+ where: fragment("?->>'type' = ?", a.data, "Accept")
+ )
+ |> Repo.all()
+
+ assert length(accepts) == 1
+
+ data =
+ File.read!("test/fixtures/mastodon-follow-activity.json")
+ |> Poison.decode!()
+ |> Map.put("id", String.replace(data["id"], "2", "3"))
+ |> Map.put("object", user.ap_id)
+
+ {:ok, %Activity{local: false}} = Transmogrifier.handle_incoming(data)
+
+ accepts =
+ from(
+ a in Activity,
+ where: fragment("?->>'type' = ?", a.data, "Accept")
+ )
+ |> Repo.all()
+
+ assert length(accepts) == 2
+ end
+
+ test "it rejects incoming follow requests from blocked users when deny_follow_blocked is enabled" do
+ Pleroma.Config.put([:user, :deny_follow_blocked], true)
+
+ user = insert(:user)
+ {:ok, target} = User.get_or_fetch("http://mastodon.example.org/users/admin")
+
+ {:ok, _user_relationship} = User.block(user, target)
+
+ data =
+ File.read!("test/fixtures/mastodon-follow-activity.json")
+ |> Poison.decode!()
+ |> Map.put("object", user.ap_id)
+
+ {:ok, %Activity{data: %{"id" => id}}} = Transmogrifier.handle_incoming(data)
+
+ %Activity{} = activity = Activity.get_by_ap_id(id)
+
+ assert activity.data["state"] == "reject"
+ end
+
+ test "it rejects incoming follow requests if the following errors for some reason" do
+ user = insert(:user)
+
+ data =
+ File.read!("test/fixtures/mastodon-follow-activity.json")
+ |> Poison.decode!()
+ |> Map.put("object", user.ap_id)
+
+ with_mock Pleroma.User, [:passthrough], follow: fn _, _, _ -> {:error, :testing} end do
+ {:ok, %Activity{data: %{"id" => id}}} = Transmogrifier.handle_incoming(data)
+
+ %Activity{} = activity = Activity.get_by_ap_id(id)
+
+ assert activity.data["state"] == "reject"
+ end
+ end
+
+ test "it works for incoming follow requests from hubzilla" do
+ user = insert(:user)
+
+ data =
+ File.read!("test/fixtures/hubzilla-follow-activity.json")
+ |> Poison.decode!()
+ |> Map.put("object", user.ap_id)
+ |> Utils.normalize_params()
+
+ {:ok, %Activity{data: data, local: false}} = Transmogrifier.handle_incoming(data)
+
+ assert data["actor"] == "https://hubzilla.example.org/channel/kaniini"
+ assert data["type"] == "Follow"
+ assert data["id"] == "https://hubzilla.example.org/channel/kaniini#follows/2"
+ assert User.following?(User.get_cached_by_ap_id(data["actor"]), user)
+ end
+
+ test "it works for incoming follows to locked account" do
+ pending_follower = insert(:user, ap_id: "http://mastodon.example.org/users/admin")
+ user = insert(:user, is_locked: true)
+
+ data =
+ File.read!("test/fixtures/mastodon-follow-activity.json")
+ |> Poison.decode!()
+ |> Map.put("object", user.ap_id)
+
+ {:ok, %Activity{data: data, local: false}} = Transmogrifier.handle_incoming(data)
+
+ assert data["type"] == "Follow"
+ assert data["object"] == user.ap_id
+ assert data["state"] == "pending"
+ assert data["actor"] == "http://mastodon.example.org/users/admin"
+
+ assert [^pending_follower] = User.get_follow_requests(user)
+ end
+ end
+end