transmogrifier_test.exs
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transmogrifier_test.exs
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	# Pleroma: A lightweight social networking server
	# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
	# SPDX-License-Identifier: AGPL-3.0-only

	defmodule Pleroma.Web.ActivityPub.TransmogrifierTest do
	use Oban.Testing, repo: Pleroma.Repo
	use Pleroma.DataCase

	alias Pleroma.Activity
	alias Pleroma.Object
	alias Pleroma.User
	alias Pleroma.Web.ActivityPub.Transmogrifier
	alias Pleroma.Web.ActivityPub.Utils
	alias Pleroma.Web.AdminAPI.AccountView
	alias Pleroma.Web.CommonAPI

	import Mock
	import Pleroma.Factory
	import ExUnit.CaptureLog

	setup_all do
	Tesla.Mock.mock_global(fn env -> apply(HttpRequestMock, :request, [env]) end)
	:ok
	end

	setup do: clear_config([:instance, :max_remote_account_fields])

	describe "handle_incoming" do
	test "it works for incoming unfollows with an existing follow" do
	user = insert(:user)

	follow_data =
	File.read!("test/fixtures/mastodon-follow-activity.json")
	\|> Jason.decode!()
	\|> Map.put("object", user.ap_id)

	{:ok, %Activity{data: _, local: false}} = Transmogrifier.handle_incoming(follow_data)

	data =
	File.read!("test/fixtures/mastodon-unfollow-activity.json")
	\|> Jason.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 accepts Flag activities" do
	user = insert(:user)
	other_user = insert(:user)

	{:ok, activity} = CommonAPI.post(user, %{status: "test post"})
	object = Object.normalize(activity, fetch: false)

	note_obj = %{
	"type" => "Note",
	"id" => activity.object.data["id"],
	"content" => "test post",
	"published" => object.data["published"],
	"actor" => AccountView.render("show.json", %{user: user, skip_visibility_check: true})
	}

	message = %{
	"@context" => "https://www.w3.org/ns/activitystreams",
	"cc" => [user.ap_id],
	"object" => [user.ap_id, activity.data["id"]],
	"type" => "Flag",
	"content" => "blocked AND reported!!!",
	"actor" => other_user.ap_id
	}

	assert {:ok, activity} = Transmogrifier.handle_incoming(message)

	assert activity.data["object"] == [user.ap_id, note_obj]
	assert activity.data["content"] == "blocked AND reported!!!"
	assert activity.data["actor"] == other_user.ap_id
	assert activity.data["cc"] == [user.ap_id]
	end

	test "it accepts Move activities" do
	old_user = insert(:user)
	new_user = insert(:user)

	message = %{
	"@context" => "https://www.w3.org/ns/activitystreams",
	"type" => "Move",
	"actor" => old_user.ap_id,
	"object" => old_user.ap_id,
	"target" => new_user.ap_id
	}

	assert :error = Transmogrifier.handle_incoming(message)

	{:ok, _new_user} = User.update_and_set_cache(new_user, %{also_known_as: [old_user.ap_id]})

	assert {:ok, %Activity{} = activity} = Transmogrifier.handle_incoming(message)
	assert activity.actor == old_user.ap_id
	assert activity.data["actor"] == old_user.ap_id
	assert activity.data["object"] == old_user.ap_id
	assert activity.data["target"] == new_user.ap_id
	assert activity.data["type"] == "Move"
	end

	test "it fixes both the Create and object contexts in a reply" do
	insert(:user, ap_id: "https://mk.absturztau.be/users/8ozbzjs3o8")
	insert(:user, ap_id: "https://p.helene.moe/users/helene")

	create_activity =
	"test/fixtures/create-pleroma-reply-to-misskey-thread.json"
	\|> File.read!()
	\|> Jason.decode!()

	assert {:ok, %Activity{} = activity} = Transmogrifier.handle_incoming(create_activity)

	object = Object.normalize(activity, fetch: false)

	assert activity.data["context"] == object.data["context"]
	end

	test "it keeps link tags" do
	insert(:user, ap_id: "https://example.org/users/alice")

	message = File.read!("test/fixtures/fep-e232.json") \|> Jason.decode!()

	assert capture_log(fn ->
	assert {:ok, activity} = Transmogrifier.handle_incoming(message)
	object = Object.normalize(activity)
	assert [%{"type" => "Mention"}, %{"type" => "Link"}] = object.data["tag"]
	end) =~ "Object rejected while fetching"
	end

	test "it accepts quote posts" do
	insert(:user, ap_id: "https://misskey.io/users/7rkrarq81i")

	object = File.read!("test/fixtures/quote_post/misskey_quote_post.json") \|> Jason.decode!()

	message = %{
	"@context" => "https://www.w3.org/ns/activitystreams",
	"type" => "Create",
	"actor" => "https://misskey.io/users/7rkrarq81i",
	"object" => object
	}

	assert {:ok, activity} = Transmogrifier.handle_incoming(message)

	# Object was created in the database
	object = Object.normalize(activity)
	assert object.data["quoteUrl"] == "https://misskey.io/notes/8vs6wxufd0"

	# It fetched the quoted post
	assert Object.normalize("https://misskey.io/notes/8vs6wxufd0")
	end
	end

	describe "prepare outgoing" do
	test "it inlines private announced objects" do
	user = insert(:user)

	{:ok, activity} = CommonAPI.post(user, %{status: "hey", visibility: "private"})

	{:ok, announce_activity} = CommonAPI.repeat(activity.id, user)

	{:ok, modified} = Transmogrifier.prepare_outgoing(announce_activity.data)

	assert modified["object"]["content"] == "hey"
	assert modified["object"]["actor"] == modified["object"]["attributedTo"]
	end

	test "it turns mentions into tags" do
	user = insert(:user)
	other_user = insert(:user)

	{:ok, activity} =
	CommonAPI.post(user, %{status: "hey, @#{other_user.nickname}, how are ya? #2hu"})

	with_mock Pleroma.Notification,
	get_notified_from_activity: fn _, _ -> [] end do
	{:ok, modified} = Transmogrifier.prepare_outgoing(activity.data)

	object = modified["object"]

	expected_mention = %{
	"href" => other_user.ap_id,
	"name" => "@#{other_user.nickname}",
	"type" => "Mention"
	}

	expected_tag = %{
	"href" => Pleroma.Web.Endpoint.url() <> "/tags/2hu",
	"type" => "Hashtag",
	"name" => "#2hu"
	}

	refute called(Pleroma.Notification.get_notified_from_activity(:_, :_))
	assert Enum.member?(object["tag"], expected_tag)
	assert Enum.member?(object["tag"], expected_mention)
	end
	end

	test "it adds the json-ld context and the conversation property" do
	user = insert(:user)

	{:ok, activity} = CommonAPI.post(user, %{status: "hey"})
	{:ok, modified} = Transmogrifier.prepare_outgoing(activity.data)

	assert modified["@context"] == Utils.make_json_ld_header()["@context"]

	assert modified["object"]["conversation"] == modified["context"]
	end

	test "it sets the 'attributedTo' property to the actor of the object if it doesn't have one" do
	user = insert(:user)

	{:ok, activity} = CommonAPI.post(user, %{status: "hey"})
	{:ok, modified} = Transmogrifier.prepare_outgoing(activity.data)

	assert modified["object"]["actor"] == modified["object"]["attributedTo"]
	end

	test "it strips internal hashtag data" do
	user = insert(:user)

	{:ok, activity} = CommonAPI.post(user, %{status: "#2hu"})

	expected_tag = %{
	"href" => Pleroma.Web.Endpoint.url() <> "/tags/2hu",
	"type" => "Hashtag",
	"name" => "#2hu"
	}

	{:ok, modified} = Transmogrifier.prepare_outgoing(activity.data)

	assert modified["object"]["tag"] == [expected_tag]
	end

	test "it strips internal fields" do
	user = insert(:user)

	{:ok, activity} =
	CommonAPI.post(user, %{
	status: "#2hu :firefox:",
	generator: %{type: "Application", name: "TestClient", url: "https://pleroma.social"}
	})

	# Ensure injected application data made it into the activity
	# as we don't have a Token to derive it from, otherwise it will
	# be nil and the test will pass
	assert %{
	type: "Application",
	name: "TestClient",
	url: "https://pleroma.social"
	} == activity.object.data["generator"]

	{:ok, modified} = Transmogrifier.prepare_outgoing(activity.data)

	assert length(modified["object"]["tag"]) == 2

	assert is_nil(modified["object"]["emoji"])
	assert is_nil(modified["object"]["like_count"])
	assert is_nil(modified["object"]["announcements"])
	assert is_nil(modified["object"]["announcement_count"])
	assert is_nil(modified["object"]["generator"])
	end

	test "it strips internal fields of article" do
	activity = insert(:article_activity)

	{:ok, modified} = Transmogrifier.prepare_outgoing(activity.data)

	assert length(modified["object"]["tag"]) == 2

	assert is_nil(modified["object"]["emoji"])
	assert is_nil(modified["object"]["like_count"])
	assert is_nil(modified["object"]["announcements"])
	assert is_nil(modified["object"]["announcement_count"])
	assert is_nil(modified["object"]["likes"])
	end

	test "the directMessage flag is present" do
	user = insert(:user)
	other_user = insert(:user)

	{:ok, activity} = CommonAPI.post(user, %{status: "2hu :moominmamma:"})

	{:ok, modified} = Transmogrifier.prepare_outgoing(activity.data)

	assert modified["directMessage"] == false

	{:ok, activity} = CommonAPI.post(user, %{status: "@#{other_user.nickname} :moominmamma:"})

	{:ok, modified} = Transmogrifier.prepare_outgoing(activity.data)

	assert modified["directMessage"] == false

	{:ok, activity} =
	CommonAPI.post(user, %{
	status: "@#{other_user.nickname} :moominmamma:",
	visibility: "direct"
	})

	{:ok, modified} = Transmogrifier.prepare_outgoing(activity.data)

	assert modified["directMessage"] == true
	end

	test "it strips BCC field" do
	user = insert(:user)
	{:ok, list} = Pleroma.List.create("foo", user)

	{:ok, activity} = CommonAPI.post(user, %{status: "foobar", visibility: "list:#{list.id}"})

	{:ok, modified} = Transmogrifier.prepare_outgoing(activity.data)

	assert is_nil(modified["bcc"])
	end

	test "it can handle Listen activities" do
	listen_activity = insert(:listen)

	{:ok, modified} = Transmogrifier.prepare_outgoing(listen_activity.data)

	assert modified["type"] == "Listen"

	user = insert(:user)

	{:ok, activity} = CommonAPI.listen(user, %{"title" => "lain radio episode 1"})

	{:ok, _modified} = Transmogrifier.prepare_outgoing(activity.data)
	end

	test "custom emoji urls are URI encoded" do
	# :dinosaur: filename has a space -> dino walking.gif
	user = insert(:user)

	{:ok, activity} = CommonAPI.post(user, %{status: "everybody do the dinosaur :dinosaur:"})

	{:ok, prepared} = Transmogrifier.prepare_outgoing(activity.data)

	assert length(prepared["object"]["tag"]) == 1

	url = prepared["object"]["tag"] \|> List.first() \|> Map.get("icon") \|> Map.get("url")

	assert url == "http://localhost:4001/emoji/dino%20walking.gif"
	end

	test "Updates of Notes are handled" do
	user = insert(:user)

	{:ok, activity} = CommonAPI.post(user, %{status: "everybody do the dinosaur :dinosaur:"})
	{:ok, update} = CommonAPI.update(activity, user, %{status: "mew mew :blank:"})

	{:ok, prepared} = Transmogrifier.prepare_outgoing(update.data)

	assert %{
	"content" => "mew mew :blank:",
	"tag" => [%{"name" => ":blank:", "type" => "Emoji"}],
	"formerRepresentations" => %{
	"orderedItems" => [
	%{
	"content" => "everybody do the dinosaur :dinosaur:",
	"tag" => [%{"name" => ":dinosaur:", "type" => "Emoji"}]
	}
	]
	}
	} = prepared["object"]
	end

	test "it prepares a quote post" do
	user = insert(:user)

	{:ok, quoted_post} = CommonAPI.post(user, %{status: "hey"})
	{:ok, quote_post} = CommonAPI.post(user, %{status: "hey", quote_id: quoted_post.id})

	{:ok, modified} = Transmogrifier.prepare_outgoing(quote_post.data)

	%{data: %{"id" => quote_id}} = Object.normalize(quoted_post)

	assert modified["object"]["quoteUrl"] == quote_id
	assert modified["object"]["quoteUri"] == quote_id
	end
	end

	describe "actor rewriting" do
	test "it fixes the actor URL property to be a proper URI" do
	data = %{
	"url" => %{"href" => "http://example.com"}
	}

	rewritten = Transmogrifier.maybe_fix_user_object(data)
	assert rewritten["url"] == "http://example.com"
	end
	end

	describe "actor origin containment" do
	test "it rejects activities which reference objects with bogus origins" do
	data = %{
	"@context" => "https://www.w3.org/ns/activitystreams",
	"id" => "http://mastodon.example.org/users/admin/activities/1234",
	"actor" => "http://mastodon.example.org/users/admin",
	"to" => ["https://www.w3.org/ns/activitystreams#Public"],
	"object" => "https://info.pleroma.site/activity.json",
	"type" => "Announce"
	}

	assert capture_log(fn ->
	{:error, _} = Transmogrifier.handle_incoming(data)
	end) =~ "Object rejected while fetching"
	end

	test "it rejects activities which reference objects that have an incorrect attribution (variant 1)" do
	data = %{
	"@context" => "https://www.w3.org/ns/activitystreams",
	"id" => "http://mastodon.example.org/users/admin/activities/1234",
	"actor" => "http://mastodon.example.org/users/admin",
	"to" => ["https://www.w3.org/ns/activitystreams#Public"],
	"object" => "https://info.pleroma.site/activity2.json",
	"type" => "Announce"
	}

	assert capture_log(fn ->
	{:error, _} = Transmogrifier.handle_incoming(data)
	end) =~ "Object rejected while fetching"
	end

	test "it rejects activities which reference objects that have an incorrect attribution (variant 2)" do
	data = %{
	"@context" => "https://www.w3.org/ns/activitystreams",
	"id" => "http://mastodon.example.org/users/admin/activities/1234",
	"actor" => "http://mastodon.example.org/users/admin",
	"to" => ["https://www.w3.org/ns/activitystreams#Public"],
	"object" => "https://info.pleroma.site/activity3.json",
	"type" => "Announce"
	}

	assert capture_log(fn ->
	{:error, _} = Transmogrifier.handle_incoming(data)
	end) =~ "Object rejected while fetching"
	end
	end

	describe "fix_explicit_addressing" do
	setup do
	user = insert(:user)
	[user: user]
	end

	test "moves non-explicitly mentioned actors to cc", %{user: user} do
	explicitly_mentioned_actors = [
	"https://pleroma.gold/users/user1",
	"https://pleroma.gold/user2"
	]

	object = %{
	"actor" => user.ap_id,
	"to" => explicitly_mentioned_actors ++ ["https://social.beepboop.ga/users/dirb"],
	"cc" => [],
	"tag" =>
	Enum.map(explicitly_mentioned_actors, fn href ->
	%{"type" => "Mention", "href" => href}
	end)
	}

	fixed_object = Transmogrifier.fix_explicit_addressing(object, user.follower_address)
	assert Enum.all?(explicitly_mentioned_actors, &(&1 in fixed_object["to"]))
	refute "https://social.beepboop.ga/users/dirb" in fixed_object["to"]
	assert "https://social.beepboop.ga/users/dirb" in fixed_object["cc"]
	end

	test "does not move actor's follower collection to cc", %{user: user} do
	object = %{
	"actor" => user.ap_id,
	"to" => [user.follower_address],
	"cc" => []
	}

	fixed_object = Transmogrifier.fix_explicit_addressing(object, user.follower_address)
	assert user.follower_address in fixed_object["to"]
	refute user.follower_address in fixed_object["cc"]
	end

	test "removes recipient's follower collection from cc", %{user: user} do
	recipient = insert(:user)

	object = %{
	"actor" => user.ap_id,
	"to" => [recipient.ap_id, "https://www.w3.org/ns/activitystreams#Public"],
	"cc" => [user.follower_address, recipient.follower_address]
	}

	fixed_object = Transmogrifier.fix_explicit_addressing(object, user.follower_address)

	assert user.follower_address in fixed_object["cc"]
	refute recipient.follower_address in fixed_object["cc"]
	refute recipient.follower_address in fixed_object["to"]
	end
	end

	describe "fix_summary/1" do
	test "returns fixed object" do
	assert Transmogrifier.fix_summary(%{"summary" => nil}) == %{"summary" => ""}
	assert Transmogrifier.fix_summary(%{"summary" => "ok"}) == %{"summary" => "ok"}
	assert Transmogrifier.fix_summary(%{}) == %{"summary" => ""}
	end
	end

	describe "fix_url/1" do
	test "fixes data for object when url is map" do
	object = %{
	"url" => %{
	"type" => "Link",
	"mimeType" => "video/mp4",
	"href" => "https://peede8d-46fb-ad81-2d4c2d1630e3-480.mp4"
	}
	}

	assert Transmogrifier.fix_url(object) == %{
	"url" => "https://peede8d-46fb-ad81-2d4c2d1630e3-480.mp4"
	}
	end

	test "returns non-modified object" do
	assert Transmogrifier.fix_url(%{"type" => "Text"}) == %{"type" => "Text"}
	end
	end

	describe "get_obj_helper/2" do
	test "returns nil when cannot normalize object" do
	assert capture_log(fn ->
	refute Transmogrifier.get_obj_helper("test-obj-id")
	end) =~ "Unsupported URI scheme"
	end

	test "returns {:ok, %Object{}} for success case" do
	assert {:ok, %Object{}} =
	Transmogrifier.get_obj_helper(
	"https://mstdn.io/users/mayuutann/statuses/99568293732299394"
	)
	end
	end

	describe "fix_attachments/1" do
	test "puts dimensions into attachment url field" do
	object = %{
	"attachment" => [
	%{
	"type" => "Document",
	"name" => "Hello world",
	"url" => "https://media.example.tld/1.jpg",
	"width" => 880,
	"height" => 960,
	"mediaType" => "image/jpeg",
	"blurhash" => "eTKL26+HDjcEIBVl;ds+K6t301W.t7nit7y1E,R:v}ai4nXSt7V@of"
	}
	]
	}

	expected = %{
	"attachment" => [
	%{
	"type" => "Document",
	"name" => "Hello world",
	"url" => [
	%{
	"type" => "Link",
	"mediaType" => "image/jpeg",
	"href" => "https://media.example.tld/1.jpg",
	"width" => 880,
	"height" => 960
	}
	],
	"mediaType" => "image/jpeg",
	"blurhash" => "eTKL26+HDjcEIBVl;ds+K6t301W.t7nit7y1E,R:v}ai4nXSt7V@of"
	}
	]
	}

	assert Transmogrifier.fix_attachments(object) == expected
	end
	end

	describe "prepare_object/1" do
	test "it processes history" do
	original = %{
	"formerRepresentations" => %{
	"orderedItems" => [
	%{
	"generator" => %{},
	"emoji" => %{"blobcat" => "http://localhost:4001/emoji/blobcat.png"}
	}
	]
	}
	}

	processed = Transmogrifier.prepare_object(original)

	history_item = Enum.at(processed["formerRepresentations"]["orderedItems"], 0)

	refute Map.has_key?(history_item, "generator")

	assert [%{"name" => ":blobcat:"}] = history_item["tag"]
	end

	test "it works when there is no or bad history" do
	original = %{
	"formerRepresentations" => %{
	"items" => [
	%{
	"generator" => %{},
	"emoji" => %{"blobcat" => "http://localhost:4001/emoji/blobcat.png"}
	}
	]
	}
	}

	processed = Transmogrifier.prepare_object(original)
	assert processed["formerRepresentations"] == original["formerRepresentations"]
	end
	end
	end

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