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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.UndoHandlingTest do
+ use Pleroma.DataCase
+
+ alias Pleroma.Activity
+ alias Pleroma.Object
+ alias Pleroma.User
+ alias Pleroma.Web.ActivityPub.Transmogrifier
+ alias Pleroma.Web.CommonAPI
+
+ import Pleroma.Factory
+
+ test "it works for incoming emoji reaction undos" do
+ user = insert(:user)
+
+ {:ok, activity} = CommonAPI.post(user, %{status: "hello"})
+ {:ok, reaction_activity} = CommonAPI.react_with_emoji(activity.id, user, "👌")
+
+ data =
+ File.read!("test/fixtures/mastodon-undo-like.json")
+ |> Poison.decode!()
+ |> Map.put("object", reaction_activity.data["id"])
+ |> Map.put("actor", user.ap_id)
+
+ {:ok, activity} = Transmogrifier.handle_incoming(data)
+
+ assert activity.actor == user.ap_id
+ assert activity.data["id"] == data["id"]
+ assert activity.data["type"] == "Undo"
+ end
+
+ test "it returns an error for incoming unlikes wihout a like activity" do
+ user = insert(:user)
+ {:ok, activity} = CommonAPI.post(user, %{status: "leave a like pls"})
+
+ data =
+ File.read!("test/fixtures/mastodon-undo-like.json")
+ |> Poison.decode!()
+ |> Map.put("object", activity.data["object"])
+
+ assert Transmogrifier.handle_incoming(data) == :error
+ end
+
+ test "it works for incoming unlikes with an existing like activity" do
+ user = insert(:user)
+ {:ok, activity} = CommonAPI.post(user, %{status: "leave a like pls"})
+
+ like_data =
+ File.read!("test/fixtures/mastodon-like.json")
+ |> Poison.decode!()
+ |> Map.put("object", activity.data["object"])
+
+ _liker = insert(:user, ap_id: like_data["actor"], local: false)
+
+ {:ok, %Activity{data: like_data, local: false}} = Transmogrifier.handle_incoming(like_data)
+
+ data =
+ File.read!("test/fixtures/mastodon-undo-like.json")
+ |> Poison.decode!()
+ |> Map.put("object", like_data)
+ |> Map.put("actor", like_data["actor"])
+
+ {:ok, %Activity{data: data, local: false}} = Transmogrifier.handle_incoming(data)
+
+ assert data["actor"] == "http://mastodon.example.org/users/admin"
+ assert data["type"] == "Undo"
+ assert data["id"] == "http://mastodon.example.org/users/admin#likes/2/undo"
+ assert data["object"] == "http://mastodon.example.org/users/admin#likes/2"
+
+ note = Object.get_by_ap_id(like_data["object"])
+ assert note.data["like_count"] == 0
+ assert note.data["likes"] == []
+ end
+
+ test "it works for incoming unlikes with an existing like activity and a compact object" do
+ user = insert(:user)
+ {:ok, activity} = CommonAPI.post(user, %{status: "leave a like pls"})
+
+ like_data =
+ File.read!("test/fixtures/mastodon-like.json")
+ |> Poison.decode!()
+ |> Map.put("object", activity.data["object"])
+
+ _liker = insert(:user, ap_id: like_data["actor"], local: false)
+
+ {:ok, %Activity{data: like_data, local: false}} = Transmogrifier.handle_incoming(like_data)
+
+ data =
+ File.read!("test/fixtures/mastodon-undo-like.json")
+ |> Poison.decode!()
+ |> Map.put("object", like_data["id"])
+ |> Map.put("actor", like_data["actor"])
+
+ {:ok, %Activity{data: data, local: false}} = Transmogrifier.handle_incoming(data)
+
+ assert data["actor"] == "http://mastodon.example.org/users/admin"
+ assert data["type"] == "Undo"
+ assert data["id"] == "http://mastodon.example.org/users/admin#likes/2/undo"
+ assert data["object"] == "http://mastodon.example.org/users/admin#likes/2"
+ end
+
+ test "it works for incoming unannounces with an existing notice" do
+ user = insert(:user)
+ {:ok, activity} = CommonAPI.post(user, %{status: "hey"})
+
+ announce_data =
+ File.read!("test/fixtures/mastodon-announce.json")
+ |> Poison.decode!()
+ |> Map.put("object", activity.data["object"])
+
+ _announcer = insert(:user, ap_id: announce_data["actor"], local: false)
+
+ {:ok, %Activity{data: announce_data, local: false}} =
+ Transmogrifier.handle_incoming(announce_data)
+
+ data =
+ File.read!("test/fixtures/mastodon-undo-announce.json")
+ |> Poison.decode!()
+ |> Map.put("object", announce_data)
+ |> Map.put("actor", announce_data["actor"])
+
+ {:ok, %Activity{data: data, local: false}} = Transmogrifier.handle_incoming(data)
+
+ assert data["type"] == "Undo"
+
+ assert data["object"] ==
+ "http://mastodon.example.org/users/admin/statuses/99542391527669785/activity"
+ end
+
+ test "it works for incoming unfollows with an existing follow" do
+ user = insert(:user)
+
+ follow_data =
+ File.read!("test/fixtures/mastodon-follow-activity.json")
+ |> Poison.decode!()
+ |> Map.put("object", user.ap_id)
+
+ _follower = insert(:user, ap_id: follow_data["actor"], local: false)
+
+ {:ok, %Activity{data: _, local: false}} = Transmogrifier.handle_incoming(follow_data)
+
+ data =
+ File.read!("test/fixtures/mastodon-unfollow-activity.json")
+ |> Poison.decode!()
+ |> Map.put("object", follow_data)
+
+ {:ok, %Activity{data: data, local: false}} = Transmogrifier.handle_incoming(data)
+
+ assert data["type"] == "Undo"
+ assert data["object"]["type"] == "Follow"
+ assert data["object"]["object"] == user.ap_id
+ assert data["actor"] == "http://mastodon.example.org/users/admin"
+
+ refute User.following?(User.get_cached_by_ap_id(data["actor"]), user)
+ end
+
+ test "it works for incoming unblocks with an existing block" do
+ user = insert(:user)
+
+ block_data =
+ File.read!("test/fixtures/mastodon-block-activity.json")
+ |> Poison.decode!()
+ |> Map.put("object", user.ap_id)
+
+ _blocker = insert(:user, ap_id: block_data["actor"], local: false)
+
+ {:ok, %Activity{data: _, local: false}} = Transmogrifier.handle_incoming(block_data)
+
+ data =
+ File.read!("test/fixtures/mastodon-unblock-activity.json")
+ |> Poison.decode!()
+ |> Map.put("object", block_data)
+
+ {:ok, %Activity{data: data, local: false}} = Transmogrifier.handle_incoming(data)
+ assert data["type"] == "Undo"
+ assert data["object"] == block_data["id"]
+
+ blocker = User.get_cached_by_ap_id(data["actor"])
+
+ refute User.blocks?(blocker, user)
+ end
+end