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	diff --git a/lib/pleroma/web/activity_pub/activity_pub.ex b/lib/pleroma/web/activity_pub/activity_pub.ex
	index 6d19792d6..4c29dda35 100644
	--- a/lib/pleroma/web/activity_pub/activity_pub.ex
	+++ b/lib/pleroma/web/activity_pub/activity_pub.ex
	@@ -1,1696 +1,1696 @@
	# Pleroma: A lightweight social networking server
	# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
	# SPDX-License-Identifier: AGPL-3.0-only

	defmodule Pleroma.Web.ActivityPub.ActivityPub do
	alias Pleroma.Activity
	alias Pleroma.Activity.Ir.Topics
	alias Pleroma.Config
	alias Pleroma.Constants
	alias Pleroma.Conversation
	alias Pleroma.Conversation.Participation
	alias Pleroma.Filter
	alias Pleroma.Hashtag
	alias Pleroma.Maps
	alias Pleroma.Notification
	alias Pleroma.Object
	alias Pleroma.Object.Containment
	alias Pleroma.Object.Fetcher
	alias Pleroma.Pagination
	alias Pleroma.Repo
	alias Pleroma.Upload
	alias Pleroma.User
	alias Pleroma.Web.ActivityPub.MRF
	alias Pleroma.Web.ActivityPub.Transmogrifier
	alias Pleroma.Web.Streamer
	alias Pleroma.Web.WebFinger
	alias Pleroma.Workers.BackgroundWorker

	import Ecto.Query
	import Pleroma.Web.ActivityPub.Utils
	import Pleroma.Web.ActivityPub.Visibility

	require Logger
	require Pleroma.Constants

	@behaviour Pleroma.Web.ActivityPub.ActivityPub.Persisting
	@behaviour Pleroma.Web.ActivityPub.ActivityPub.Streaming

	defp get_recipients(%{"type" => "Create"} = data) do
	to = Map.get(data, "to", [])
	cc = Map.get(data, "cc", [])
	bcc = Map.get(data, "bcc", [])
	actor = Map.get(data, "actor", [])
	recipients = [to, cc, bcc, [actor]] \|> Enum.concat() \|> Enum.uniq()
	{recipients, to, cc}
	end

	defp get_recipients(data) do
	to = Map.get(data, "to", [])
	cc = Map.get(data, "cc", [])
	bcc = Map.get(data, "bcc", [])
	recipients = Enum.concat([to, cc, bcc])
	{recipients, to, cc}
	end

	defp check_actor_can_insert(%{"type" => "Delete"}), do: true
	defp check_actor_can_insert(%{"type" => "Undo"}), do: true

	defp check_actor_can_insert(%{"actor" => actor}) when is_binary(actor) do
	case User.get_cached_by_ap_id(actor) do
	%User{is_active: true} -> true
	_ -> false
	end
	end

	defp check_actor_can_insert(_), do: true

	defp check_remote_limit(%{"object" => %{"content" => content}}) when not is_nil(content) do
	limit = Config.get([:instance, :remote_limit])
	String.length(content) <= limit
	end

	defp check_remote_limit(_), do: true

	def increase_note_count_if_public(actor, object) do
	if is_public?(object), do: User.increase_note_count(actor), else: {:ok, actor}
	end

	def decrease_note_count_if_public(actor, object) do
	if is_public?(object), do: User.decrease_note_count(actor), else: {:ok, actor}
	end

	defp increase_replies_count_if_reply(%{
	"object" => %{"inReplyTo" => reply_ap_id} = object,
	"type" => "Create"
	}) do
	if is_public?(object) do
	Object.increase_replies_count(reply_ap_id)
	end
	end

	defp increase_replies_count_if_reply(_create_data), do: :noop

	- @object_types ~w[ChatMessage Question Answer Audio Video Event Article Note]
	+ @object_types ~w[ChatMessage Question Answer Audio Video Event Article Note Page]
	@impl true
	def persist(%{"type" => type} = object, meta) when type in @object_types do
	with {:ok, object} <- Object.create(object) do
	{:ok, object, meta}
	end
	end

	@impl true
	def persist(object, meta) do
	with local <- Keyword.fetch!(meta, :local),
	{recipients, _, _} <- get_recipients(object),
	{:ok, activity} <-
	Repo.insert(%Activity{
	data: object,
	local: local,
	recipients: recipients,
	actor: object["actor"]
	}),
	# TODO: add tests for expired activities, when Note type will be supported in new pipeline
	{:ok, _} <- maybe_create_activity_expiration(activity) do
	{:ok, activity, meta}
	end
	end

	@spec insert(map(), boolean(), boolean(), boolean()) :: {:ok, Activity.t()} \| {:error, any()}
	def insert(map, local \\ true, fake \\ false, bypass_actor_check \\ false) when is_map(map) do
	with nil <- Activity.normalize(map),
	map <- lazy_put_activity_defaults(map, fake),
	{_, true} <- {:actor_check, bypass_actor_check \|\| check_actor_can_insert(map)},
	{_, true} <- {:remote_limit_pass, check_remote_limit(map)},
	{:ok, map} <- MRF.filter(map),
	{recipients, _, _} = get_recipients(map),
	{:fake, false, map, recipients} <- {:fake, fake, map, recipients},
	{:containment, :ok} <- {:containment, Containment.contain_child(map)},
	{:ok, map, object} <- insert_full_object(map),
	{:ok, activity} <- insert_activity_with_expiration(map, local, recipients) do
	# Splice in the child object if we have one.
	activity = Maps.put_if_present(activity, :object, object)

	ConcurrentLimiter.limit(Pleroma.Web.RichMedia.Helpers, fn ->
	Task.start(fn -> Pleroma.Web.RichMedia.Helpers.fetch_data_for_activity(activity) end)
	end)

	{:ok, activity}
	else
	%Activity{} = activity ->
	{:ok, activity}

	{:actor_check, _} ->
	{:error, false}

	{:containment, _} = error ->
	error

	{:error, _} = error ->
	error

	{:fake, true, map, recipients} ->
	activity = %Activity{
	data: map,
	local: local,
	actor: map["actor"],
	recipients: recipients,
	id: "pleroma:fakeid"
	}

	Pleroma.Web.RichMedia.Helpers.fetch_data_for_activity(activity)
	{:ok, activity}

	{:remote_limit_pass, _} ->
	{:error, :remote_limit}

	{:reject, _} = e ->
	{:error, e}
	end
	end

	defp insert_activity_with_expiration(data, local, recipients) do
	struct = %Activity{
	data: data,
	local: local,
	actor: data["actor"],
	recipients: recipients
	}

	with {:ok, activity} <- Repo.insert(struct) do
	maybe_create_activity_expiration(activity)
	end
	end

	def notify_and_stream(activity) do
	Notification.create_notifications(activity)

	conversation = create_or_bump_conversation(activity, activity.actor)
	participations = get_participations(conversation)
	stream_out(activity)
	stream_out_participations(participations)
	end

	defp maybe_create_activity_expiration(
	%{data: %{"expires_at" => %DateTime{} = expires_at}} = activity
	) do
	with {:ok, _job} <-
	Pleroma.Workers.PurgeExpiredActivity.enqueue(%{
	activity_id: activity.id,
	expires_at: expires_at
	}) do
	{:ok, activity}
	end
	end

	defp maybe_create_activity_expiration(activity), do: {:ok, activity}

	defp create_or_bump_conversation(activity, actor) do
	with {:ok, conversation} <- Conversation.create_or_bump_for(activity),
	%User{} = user <- User.get_cached_by_ap_id(actor) do
	Participation.mark_as_read(user, conversation)
	{:ok, conversation}
	end
	end

	defp get_participations({:ok, conversation}) do
	conversation
	\|> Repo.preload(:participations, force: true)
	\|> Map.get(:participations)
	end

	defp get_participations(_), do: []

	def stream_out_participations(participations) do
	participations =
	participations
	\|> Repo.preload(:user)

	Streamer.stream("participation", participations)
	end

	@impl true
	def stream_out_participations(%Object{data: %{"context" => context}}, user) do
	with %Conversation{} = conversation <- Conversation.get_for_ap_id(context) do
	conversation = Repo.preload(conversation, :participations)

	last_activity_id =
	fetch_latest_direct_activity_id_for_context(conversation.ap_id, %{
	user: user,
	blocking_user: user
	})

	if last_activity_id do
	stream_out_participations(conversation.participations)
	end
	end
	end

	@impl true
	def stream_out_participations(_, _), do: :noop

	@impl true
	def stream_out(%Activity{data: %{"type" => data_type}} = activity)
	when data_type in ["Create", "Announce", "Delete"] do
	activity
	\|> Topics.get_activity_topics()
	\|> Streamer.stream(activity)
	end

	@impl true
	def stream_out(_activity) do
	:noop
	end

	@spec create(map(), boolean()) :: {:ok, Activity.t()} \| {:error, any()}
	def create(params, fake \\ false) do
	with {:ok, result} <- Repo.transaction(fn -> do_create(params, fake) end) do
	result
	end
	end

	defp do_create(%{to: to, actor: actor, context: context, object: object} = params, fake) do
	additional = params[:additional] \|\| %{}
	# only accept false as false value
	local = !(params[:local] == false)
	published = params[:published]
	quick_insert? = Config.get([:env]) == :benchmark

	create_data =
	make_create_data(
	%{to: to, actor: actor, published: published, context: context, object: object},
	additional
	)

	with {:ok, activity} <- insert(create_data, local, fake),
	{:fake, false, activity} <- {:fake, fake, activity},
	_ <- increase_replies_count_if_reply(create_data),
	{:quick_insert, false, activity} <- {:quick_insert, quick_insert?, activity},
	{:ok, _actor} <- increase_note_count_if_public(actor, activity),
	_ <- notify_and_stream(activity),
	:ok <- maybe_federate(activity) do
	{:ok, activity}
	else
	{:quick_insert, true, activity} ->
	{:ok, activity}

	{:fake, true, activity} ->
	{:ok, activity}

	{:error, message} ->
	Repo.rollback(message)
	end
	end

	@spec listen(map()) :: {:ok, Activity.t()} \| {:error, any()}
	def listen(%{to: to, actor: actor, context: context, object: object} = params) do
	additional = params[:additional] \|\| %{}
	# only accept false as false value
	local = !(params[:local] == false)
	published = params[:published]

	listen_data =
	make_listen_data(
	%{to: to, actor: actor, published: published, context: context, object: object},
	additional
	)

	with {:ok, activity} <- insert(listen_data, local),
	_ <- notify_and_stream(activity),
	:ok <- maybe_federate(activity) do
	{:ok, activity}
	end
	end

	@spec unfollow(User.t(), User.t(), String.t() \| nil, boolean()) ::
	{:ok, Activity.t()} \| nil \| {:error, any()}
	def unfollow(follower, followed, activity_id \\ nil, local \\ true) do
	with {:ok, result} <-
	Repo.transaction(fn -> do_unfollow(follower, followed, activity_id, local) end) do
	result
	end
	end

	defp do_unfollow(follower, followed, activity_id, local) do
	with %Activity{} = follow_activity <- fetch_latest_follow(follower, followed),
	{:ok, follow_activity} <- update_follow_state(follow_activity, "cancelled"),
	unfollow_data <- make_unfollow_data(follower, followed, follow_activity, activity_id),
	{:ok, activity} <- insert(unfollow_data, local),
	_ <- notify_and_stream(activity),
	:ok <- maybe_federate(activity) do
	{:ok, activity}
	else
	nil -> nil
	{:error, error} -> Repo.rollback(error)
	end
	end

	@spec flag(map()) :: {:ok, Activity.t()} \| {:error, any()}
	def flag(params) do
	with {:ok, result} <- Repo.transaction(fn -> do_flag(params) end) do
	result
	end
	end

	defp do_flag(
	%{
	actor: actor,
	context: _context,
	account: account,
	statuses: statuses,
	content: content
	} = params
	) do
	# only accept false as false value
	local = !(params[:local] == false)
	forward = !(params[:forward] == false)

	additional = params[:additional] \|\| %{}

	additional =
	if forward do
	Map.merge(additional, %{"to" => [], "cc" => [account.ap_id]})
	else
	Map.merge(additional, %{"to" => [], "cc" => []})
	end

	with flag_data <- make_flag_data(params, additional),
	{:ok, activity} <- insert(flag_data, local),
	{:ok, stripped_activity} <- strip_report_status_data(activity),
	_ <- notify_and_stream(activity),
	:ok <-
	maybe_federate(stripped_activity) do
	User.all_superusers()
	\|> Enum.filter(fn user -> user.ap_id != actor end)
	\|> Enum.filter(fn user -> not is_nil(user.email) end)
	\|> Enum.each(fn superuser ->
	superuser
	\|> Pleroma.Emails.AdminEmail.report(actor, account, statuses, content)
	\|> Pleroma.Emails.Mailer.deliver_async()
	end)

	{:ok, activity}
	else
	{:error, error} -> Repo.rollback(error)
	end
	end

	@spec move(User.t(), User.t(), boolean()) :: {:ok, Activity.t()} \| {:error, any()}
	def move(%User{} = origin, %User{} = target, local \\ true) do
	params = %{
	"type" => "Move",
	"actor" => origin.ap_id,
	"object" => origin.ap_id,
	"target" => target.ap_id
	}

	with true <- origin.ap_id in target.also_known_as,
	{:ok, activity} <- insert(params, local),
	_ <- notify_and_stream(activity) do
	maybe_federate(activity)

	BackgroundWorker.enqueue("move_following", %{
	"origin_id" => origin.id,
	"target_id" => target.id
	})

	{:ok, activity}
	else
	false -> {:error, "Target account must have the origin in `alsoKnownAs`"}
	err -> err
	end
	end

	def fetch_activities_for_context_query(context, opts) do
	public = [Constants.as_public()]

	recipients =
	if opts[:user],
	do: [opts[:user].ap_id \| User.following(opts[:user])] ++ public,
	else: public

	from(activity in Activity)
	\|> maybe_preload_objects(opts)
	\|> maybe_preload_bookmarks(opts)
	\|> maybe_set_thread_muted_field(opts)
	\|> restrict_blocked(opts)
	\|> restrict_recipients(recipients, opts[:user])
	\|> restrict_filtered(opts)
	\|> where(
	[activity],
	fragment(
	"?->>'type' = ? and ?->>'context' = ?",
	activity.data,
	"Create",
	activity.data,
	^context
	)
	)
	\|> exclude_poll_votes(opts)
	\|> exclude_id(opts)
	\|> order_by([activity], desc: activity.id)
	end

	@spec fetch_activities_for_context(String.t(), keyword() \| map()) :: [Activity.t()]
	def fetch_activities_for_context(context, opts \\ %{}) do
	context
	\|> fetch_activities_for_context_query(opts)
	\|> Repo.all()
	end

	@spec fetch_latest_direct_activity_id_for_context(String.t(), keyword() \| map()) ::
	FlakeId.Ecto.CompatType.t() \| nil
	def fetch_latest_direct_activity_id_for_context(context, opts \\ %{}) do
	context
	\|> fetch_activities_for_context_query(Map.merge(%{skip_preload: true}, opts))
	\|> restrict_visibility(%{visibility: "direct"})
	\|> limit(1)
	\|> select([a], a.id)
	\|> Repo.one()
	end

	defp fetch_paginated_optimized(query, opts, pagination) do
	# Note: tag-filtering funcs may apply "ORDER BY objects.id DESC",
	# and extra sorting on "activities.id DESC NULLS LAST" would worse the query plan
	opts = Map.put(opts, :skip_extra_order, true)

	Pagination.fetch_paginated(query, opts, pagination)
	end

	def fetch_activities(recipients, opts \\ %{}, pagination \\ :keyset) do
	list_memberships = Pleroma.List.memberships(opts[:user])

	fetch_activities_query(recipients ++ list_memberships, opts)
	\|> fetch_paginated_optimized(opts, pagination)
	\|> Enum.reverse()
	\|> maybe_update_cc(list_memberships, opts[:user])
	end

	@spec fetch_public_or_unlisted_activities(map(), Pagination.type()) :: [Activity.t()]
	def fetch_public_or_unlisted_activities(opts \\ %{}, pagination \\ :keyset) do
	opts = Map.delete(opts, :user)

	[Constants.as_public()]
	\|> fetch_activities_query(opts)
	\|> restrict_unlisted(opts)
	\|> fetch_paginated_optimized(opts, pagination)
	end

	@spec fetch_public_activities(map(), Pagination.type()) :: [Activity.t()]
	def fetch_public_activities(opts \\ %{}, pagination \\ :keyset) do
	opts
	\|> Map.put(:restrict_unlisted, true)
	\|> fetch_public_or_unlisted_activities(pagination)
	end

	@valid_visibilities ~w[direct unlisted public private]

	defp restrict_visibility(query, %{visibility: visibility})
	when is_list(visibility) do
	if Enum.all?(visibility, &(&1 in @valid_visibilities)) do
	from(
	a in query,
	where:
	fragment(
	"activity_visibility(?, ?, ?) = ANY (?)",
	a.actor,
	a.recipients,
	a.data,
	^visibility
	)
	)
	else
	Logger.error("Could not restrict visibility to #{visibility}")
	end
	end

	defp restrict_visibility(query, %{visibility: visibility})
	when visibility in @valid_visibilities do
	from(
	a in query,
	where:
	fragment("activity_visibility(?, ?, ?) = ?", a.actor, a.recipients, a.data, ^visibility)
	)
	end

	defp restrict_visibility(_query, %{visibility: visibility})
	when visibility not in @valid_visibilities do
	Logger.error("Could not restrict visibility to #{visibility}")
	end

	defp restrict_visibility(query, _visibility), do: query

	defp exclude_visibility(query, %{exclude_visibilities: visibility})
	when is_list(visibility) do
	if Enum.all?(visibility, &(&1 in @valid_visibilities)) do
	from(
	a in query,
	where:
	not fragment(
	"activity_visibility(?, ?, ?) = ANY (?)",
	a.actor,
	a.recipients,
	a.data,
	^visibility
	)
	)
	else
	Logger.error("Could not exclude visibility to #{visibility}")
	query
	end
	end

	defp exclude_visibility(query, %{exclude_visibilities: visibility})
	when visibility in @valid_visibilities do
	from(
	a in query,
	where:
	not fragment(
	"activity_visibility(?, ?, ?) = ?",
	a.actor,
	a.recipients,
	a.data,
	^visibility
	)
	)
	end

	defp exclude_visibility(query, %{exclude_visibilities: visibility})
	when visibility not in [nil \| @valid_visibilities] do
	Logger.error("Could not exclude visibility to #{visibility}")
	query
	end

	defp exclude_visibility(query, _visibility), do: query

	defp restrict_thread_visibility(query, _, %{skip_thread_containment: true} = _),
	do: query

	defp restrict_thread_visibility(query, %{user: %User{skip_thread_containment: true}}, _),
	do: query

	defp restrict_thread_visibility(query, %{user: %User{ap_id: ap_id}}, _) do
	from(
	a in query,
	where: fragment("thread_visibility(?, (?)->>'id') = true", ^ap_id, a.data)
	)
	end

	defp restrict_thread_visibility(query, _, _), do: query

	def fetch_user_abstract_activities(user, reading_user, params \\ %{}) do
	params =
	params
	\|> Map.put(:user, reading_user)
	\|> Map.put(:actor_id, user.ap_id)

	%{
	godmode: params[:godmode],
	reading_user: reading_user
	}
	\|> user_activities_recipients()
	\|> fetch_activities(params)
	\|> Enum.reverse()
	end

	def fetch_user_activities(user, reading_user, params \\ %{})

	def fetch_user_activities(user, reading_user, %{total: true} = params) do
	result = fetch_activities_for_user(user, reading_user, params)

	Keyword.put(result, :items, Enum.reverse(result[:items]))
	end

	def fetch_user_activities(user, reading_user, params) do
	user
	\|> fetch_activities_for_user(reading_user, params)
	\|> Enum.reverse()
	end

	defp fetch_activities_for_user(user, reading_user, params) do
	params =
	params
	\|> Map.put(:type, ["Create", "Announce"])
	\|> Map.put(:user, reading_user)
	\|> Map.put(:actor_id, user.ap_id)
	\|> Map.put(:pinned_object_ids, Map.keys(user.pinned_objects))

	params =
	if User.blocks?(reading_user, user) do
	params
	else
	params
	\|> Map.put(:blocking_user, reading_user)
	\|> Map.put(:muting_user, reading_user)
	end

	pagination_type = Map.get(params, :pagination_type) \|\| :keyset

	%{
	godmode: params[:godmode],
	reading_user: reading_user
	}
	\|> user_activities_recipients()
	\|> fetch_activities(params, pagination_type)
	end

	def fetch_statuses(reading_user, %{total: true} = params) do
	result = fetch_activities_for_reading_user(reading_user, params)
	Keyword.put(result, :items, Enum.reverse(result[:items]))
	end

	def fetch_statuses(reading_user, params) do
	reading_user
	\|> fetch_activities_for_reading_user(params)
	\|> Enum.reverse()
	end

	defp fetch_activities_for_reading_user(reading_user, params) do
	params = Map.put(params, :type, ["Create", "Announce"])

	%{
	godmode: params[:godmode],
	reading_user: reading_user
	}
	\|> user_activities_recipients()
	\|> fetch_activities(params, :offset)
	end

	defp user_activities_recipients(%{godmode: true}), do: []

	defp user_activities_recipients(%{reading_user: reading_user}) do
	if reading_user do
	[Constants.as_public(), reading_user.ap_id \| User.following(reading_user)]
	else
	[Constants.as_public()]
	end
	end

	defp restrict_announce_object_actor(_query, %{announce_filtering_user: _, skip_preload: true}) do
	raise "Can't use the child object without preloading!"
	end

	defp restrict_announce_object_actor(query, %{announce_filtering_user: %{ap_id: actor}}) do
	from(
	[activity, object] in query,
	where:
	fragment(
	"?->>'type' != ? or ?->>'actor' != ?",
	activity.data,
	"Announce",
	object.data,
	^actor
	)
	)
	end

	defp restrict_announce_object_actor(query, _), do: query

	defp restrict_since(query, %{since_id: ""}), do: query

	defp restrict_since(query, %{since_id: since_id}) do
	from(activity in query, where: activity.id > ^since_id)
	end

	defp restrict_since(query, _), do: query

	defp restrict_embedded_tag_all(_query, %{tag_all: _tag_all, skip_preload: true}) do
	raise_on_missing_preload()
	end

	defp restrict_embedded_tag_all(query, %{tag_all: [_ \| _] = tag_all}) do
	from(
	[_activity, object] in query,
	where: fragment("(?)->'tag' \\?& (?)", object.data, ^tag_all)
	)
	end

	defp restrict_embedded_tag_all(query, %{tag_all: tag}) when is_binary(tag) do
	restrict_embedded_tag_any(query, %{tag: tag})
	end

	defp restrict_embedded_tag_all(query, _), do: query

	defp restrict_embedded_tag_any(_query, %{tag: _tag, skip_preload: true}) do
	raise_on_missing_preload()
	end

	defp restrict_embedded_tag_any(query, %{tag: [_ \| _] = tag_any}) do
	from(
	[_activity, object] in query,
	where: fragment("(?)->'tag' \\?\| (?)", object.data, ^tag_any)
	)
	end

	defp restrict_embedded_tag_any(query, %{tag: tag}) when is_binary(tag) do
	restrict_embedded_tag_any(query, %{tag: [tag]})
	end

	defp restrict_embedded_tag_any(query, _), do: query

	defp restrict_embedded_tag_reject_any(_query, %{tag_reject: _tag_reject, skip_preload: true}) do
	raise_on_missing_preload()
	end

	defp restrict_embedded_tag_reject_any(query, %{tag_reject: [_ \| _] = tag_reject}) do
	from(
	[_activity, object] in query,
	where: fragment("not (?)->'tag' \\?\| (?)", object.data, ^tag_reject)
	)
	end

	defp restrict_embedded_tag_reject_any(query, %{tag_reject: tag_reject})
	when is_binary(tag_reject) do
	restrict_embedded_tag_reject_any(query, %{tag_reject: [tag_reject]})
	end

	defp restrict_embedded_tag_reject_any(query, _), do: query

	defp object_ids_query_for_tags(tags) do
	from(hto in "hashtags_objects")
	\|> join(:inner, [hto], ht in Pleroma.Hashtag, on: hto.hashtag_id == ht.id)
	\|> where([hto, ht], ht.name in ^tags)
	\|> select([hto], hto.object_id)
	\|> distinct([hto], true)
	end

	defp restrict_hashtag_all(_query, %{tag_all: _tag, skip_preload: true}) do
	raise_on_missing_preload()
	end

	defp restrict_hashtag_all(query, %{tag_all: [single_tag]}) do
	restrict_hashtag_any(query, %{tag: single_tag})
	end

	defp restrict_hashtag_all(query, %{tag_all: [_ \| _] = tags}) do
	from(
	[_activity, object] in query,
	where:
	fragment(
	"""
	(SELECT array_agg(hashtags.name) FROM hashtags JOIN hashtags_objects
	ON hashtags_objects.hashtag_id = hashtags.id WHERE hashtags.name = ANY(?)
	AND hashtags_objects.object_id = ?) @> ?
	""",
	^tags,
	object.id,
	^tags
	)
	)
	end

	defp restrict_hashtag_all(query, %{tag_all: tag}) when is_binary(tag) do
	restrict_hashtag_all(query, %{tag_all: [tag]})
	end

	defp restrict_hashtag_all(query, _), do: query

	defp restrict_hashtag_any(_query, %{tag: _tag, skip_preload: true}) do
	raise_on_missing_preload()
	end

	defp restrict_hashtag_any(query, %{tag: [_ \| _] = tags}) do
	hashtag_ids =
	from(ht in Hashtag, where: ht.name in ^tags, select: ht.id)
	\|> Repo.all()

	# Note: NO extra ordering should be done on "activities.id desc nulls last" for optimal plan
	from(
	[_activity, object] in query,
	join: hto in "hashtags_objects",
	on: hto.object_id == object.id,
	where: hto.hashtag_id in ^hashtag_ids,
	distinct: [desc: object.id],
	order_by: [desc: object.id]
	)
	end

	defp restrict_hashtag_any(query, %{tag: tag}) when is_binary(tag) do
	restrict_hashtag_any(query, %{tag: [tag]})
	end

	defp restrict_hashtag_any(query, _), do: query

	defp restrict_hashtag_reject_any(_query, %{tag_reject: _tag_reject, skip_preload: true}) do
	raise_on_missing_preload()
	end

	defp restrict_hashtag_reject_any(query, %{tag_reject: [_ \| _] = tags_reject}) do
	from(
	[_activity, object] in query,
	where: object.id not in subquery(object_ids_query_for_tags(tags_reject))
	)
	end

	defp restrict_hashtag_reject_any(query, %{tag_reject: tag_reject}) when is_binary(tag_reject) do
	restrict_hashtag_reject_any(query, %{tag_reject: [tag_reject]})
	end

	defp restrict_hashtag_reject_any(query, _), do: query

	defp raise_on_missing_preload do
	raise "Can't use the child object without preloading!"
	end

	defp restrict_recipients(query, [], _user), do: query

	defp restrict_recipients(query, recipients, nil) do
	from(activity in query, where: fragment("? && ?", ^recipients, activity.recipients))
	end

	defp restrict_recipients(query, recipients, user) do
	from(
	activity in query,
	where: fragment("? && ?", ^recipients, activity.recipients),
	or_where: activity.actor == ^user.ap_id
	)
	end

	defp restrict_local(query, %{local_only: true}) do
	from(activity in query, where: activity.local == true)
	end

	defp restrict_local(query, _), do: query

	defp restrict_remote(query, %{remote: true}) do
	from(activity in query, where: activity.local == false)
	end

	defp restrict_remote(query, _), do: query

	defp restrict_actor(query, %{actor_id: actor_id}) do
	from(activity in query, where: activity.actor == ^actor_id)
	end

	defp restrict_actor(query, _), do: query

	defp restrict_type(query, %{type: type}) when is_binary(type) do
	from(activity in query, where: fragment("?->>'type' = ?", activity.data, ^type))
	end

	defp restrict_type(query, %{type: type}) do
	from(activity in query, where: fragment("?->>'type' = ANY(?)", activity.data, ^type))
	end

	defp restrict_type(query, _), do: query

	defp restrict_state(query, %{state: state}) do
	from(activity in query, where: fragment("?->>'state' = ?", activity.data, ^state))
	end

	defp restrict_state(query, _), do: query

	defp restrict_favorited_by(query, %{favorited_by: ap_id}) do
	from(
	[_activity, object] in query,
	where: fragment("(?)->'likes' \\? (?)", object.data, ^ap_id)
	)
	end

	defp restrict_favorited_by(query, _), do: query

	defp restrict_media(_query, %{only_media: _val, skip_preload: true}) do
	raise "Can't use the child object without preloading!"
	end

	defp restrict_media(query, %{only_media: true}) do
	from(
	[activity, object] in query,
	where: fragment("(?)->>'type' = ?", activity.data, "Create"),
	where: fragment("not (?)->'attachment' = (?)", object.data, ^[])
	)
	end

	defp restrict_media(query, _), do: query

	defp restrict_replies(query, %{exclude_replies: true}) do
	from(
	[_activity, object] in query,
	where: fragment("?->>'inReplyTo' is null", object.data)
	)
	end

	defp restrict_replies(query, %{
	reply_filtering_user: %User{} = user,
	reply_visibility: "self"
	}) do
	from(
	[activity, object] in query,
	where:
	fragment(
	"?->>'inReplyTo' is null OR ? = ANY(?)",
	object.data,
	^user.ap_id,
	activity.recipients
	)
	)
	end

	defp restrict_replies(query, %{
	reply_filtering_user: %User{} = user,
	reply_visibility: "following"
	}) do
	from(
	[activity, object] in query,
	where:
	fragment(
	"""
	?->>'type' != 'Create' -- This isn't a Create
	OR ?->>'inReplyTo' is null -- this isn't a reply
	OR ? && array_remove(?, ?) -- The recipient is us or one of our friends,
	-- unless they are the author (because authors
	-- are also part of the recipients). This leads
	-- to a bug that self-replies by friends won't
	-- show up.
	OR ? = ? -- The actor is us
	""",
	activity.data,
	object.data,
	^[user.ap_id \| User.get_cached_user_friends_ap_ids(user)],
	activity.recipients,
	activity.actor,
	activity.actor,
	^user.ap_id
	)
	)
	end

	defp restrict_replies(query, _), do: query

	defp restrict_reblogs(query, %{exclude_reblogs: true}) do
	from(activity in query, where: fragment("?->>'type' != 'Announce'", activity.data))
	end

	defp restrict_reblogs(query, _), do: query

	defp restrict_muted(query, %{with_muted: true}), do: query

	defp restrict_muted(query, %{muting_user: %User{} = user} = opts) do
	mutes = opts[:muted_users_ap_ids] \|\| User.muted_users_ap_ids(user)

	query =
	from([activity] in query,
	where: fragment("not (? = ANY(?))", activity.actor, ^mutes),
	where:
	fragment(
	"not (?->'to' \\?\| ?) or ? = ?",
	activity.data,
	^mutes,
	activity.actor,
	^user.ap_id
	)
	)

	unless opts[:skip_preload] do
	from([thread_mute: tm] in query, where: is_nil(tm.user_id))
	else
	query
	end
	end

	defp restrict_muted(query, _), do: query

	defp restrict_blocked(query, %{blocking_user: %User{} = user} = opts) do
	blocked_ap_ids = opts[:blocked_users_ap_ids] \|\| User.blocked_users_ap_ids(user)
	domain_blocks = user.domain_blocks \|\| []

	following_ap_ids = User.get_friends_ap_ids(user)

	query =
	if has_named_binding?(query, :object), do: query, else: Activity.with_joined_object(query)

	from(
	[activity, object: o] in query,
	where: fragment("not (? = ANY(?))", activity.actor, ^blocked_ap_ids),
	where:
	fragment(
	"((not (? && ?)) or ? = ?)",
	activity.recipients,
	^blocked_ap_ids,
	activity.actor,
	^user.ap_id
	),
	where:
	fragment(
	"recipients_contain_blocked_domains(?, ?) = false",
	activity.recipients,
	^domain_blocks
	),
	where:
	fragment(
	"not (?->>'type' = 'Announce' and ?->'to' \\?\| ?)",
	activity.data,
	activity.data,
	^blocked_ap_ids
	),
	where:
	fragment(
	"(not (split_part(?, '/', 3) = ANY(?))) or ? = ANY(?)",
	activity.actor,
	^domain_blocks,
	activity.actor,
	^following_ap_ids
	),
	where:
	fragment(
	"(not (split_part(?->>'actor', '/', 3) = ANY(?))) or (?->>'actor') = ANY(?)",
	o.data,
	^domain_blocks,
	o.data,
	^following_ap_ids
	)
	)
	end

	defp restrict_blocked(query, _), do: query

	defp restrict_unlisted(query, %{restrict_unlisted: true}) do
	from(
	activity in query,
	where:
	fragment(
	"not (coalesce(?->'cc', '{}'::jsonb) \\?\| ?)",
	activity.data,
	^[Constants.as_public()]
	)
	)
	end

	defp restrict_unlisted(query, _), do: query

	defp restrict_pinned(query, %{pinned: true, pinned_object_ids: ids}) do
	from(
	[activity, object: o] in query,
	where:
	fragment(
	"(?)->>'type' = 'Create' and coalesce((?)->'object'->>'id', (?)->>'object') = any (?)",
	activity.data,
	activity.data,
	activity.data,
	^ids
	)
	)
	end

	defp restrict_pinned(query, _), do: query

	defp restrict_muted_reblogs(query, %{muting_user: %User{} = user} = opts) do
	muted_reblogs = opts[:reblog_muted_users_ap_ids] \|\| User.reblog_muted_users_ap_ids(user)

	from(
	activity in query,
	where:
	fragment(
	"not ( ?->>'type' = 'Announce' and ? = ANY(?))",
	activity.data,
	activity.actor,
	^muted_reblogs
	)
	)
	end

	defp restrict_muted_reblogs(query, _), do: query

	defp restrict_instance(query, %{instance: instance}) when is_binary(instance) do
	from(
	activity in query,
	where: fragment("split_part(actor::text, '/'::text, 3) = ?", ^instance)
	)
	end

	defp restrict_instance(query, _), do: query

	defp restrict_filtered(query, %{user: %User{} = user}) do
	case Filter.compose_regex(user) do
	nil ->
	query

	regex ->
	from([activity, object] in query,
	where:
	fragment("not(?->>'content' ~* ?)", object.data, ^regex) or
	activity.actor == ^user.ap_id
	)
	end
	end

	defp restrict_filtered(query, %{blocking_user: %User{} = user}) do
	restrict_filtered(query, %{user: user})
	end

	defp restrict_filtered(query, _), do: query

	defp exclude_poll_votes(query, %{include_poll_votes: true}), do: query

	defp exclude_poll_votes(query, _) do
	if has_named_binding?(query, :object) do
	from([activity, object: o] in query,
	where: fragment("not(?->>'type' = ?)", o.data, "Answer")
	)
	else
	query
	end
	end

	defp exclude_chat_messages(query, %{include_chat_messages: true}), do: query

	defp exclude_chat_messages(query, _) do
	if has_named_binding?(query, :object) do
	from([activity, object: o] in query,
	where: fragment("not(?->>'type' = ?)", o.data, "ChatMessage")
	)
	else
	query
	end
	end

	defp exclude_invisible_actors(query, %{invisible_actors: true}), do: query

	defp exclude_invisible_actors(query, _opts) do
	invisible_ap_ids =
	User.Query.build(%{invisible: true, select: [:ap_id]})
	\|> Repo.all()
	\|> Enum.map(fn %{ap_id: ap_id} -> ap_id end)

	from([activity] in query, where: activity.actor not in ^invisible_ap_ids)
	end

	defp exclude_id(query, %{exclude_id: id}) when is_binary(id) do
	from(activity in query, where: activity.id != ^id)
	end

	defp exclude_id(query, _), do: query

	defp maybe_preload_objects(query, %{skip_preload: true}), do: query

	defp maybe_preload_objects(query, _) do
	query
	\|> Activity.with_preloaded_object()
	end

	defp maybe_preload_bookmarks(query, %{skip_preload: true}), do: query

	defp maybe_preload_bookmarks(query, opts) do
	query
	\|> Activity.with_preloaded_bookmark(opts[:user])
	end

	defp maybe_preload_report_notes(query, %{preload_report_notes: true}) do
	query
	\|> Activity.with_preloaded_report_notes()
	end

	defp maybe_preload_report_notes(query, _), do: query

	defp maybe_set_thread_muted_field(query, %{skip_preload: true}), do: query

	defp maybe_set_thread_muted_field(query, opts) do
	query
	\|> Activity.with_set_thread_muted_field(opts[:muting_user] \|\| opts[:user])
	end

	defp maybe_order(query, %{order: :desc}) do
	query
	\|> order_by(desc: :id)
	end

	defp maybe_order(query, %{order: :asc}) do
	query
	\|> order_by(asc: :id)
	end

	defp maybe_order(query, _), do: query

	defp normalize_fetch_activities_query_opts(opts) do
	Enum.reduce([:tag, :tag_all, :tag_reject], opts, fn key, opts ->
	case opts[key] do
	value when is_bitstring(value) ->
	Map.put(opts, key, Hashtag.normalize_name(value))

	value when is_list(value) ->
	normalized_value =
	value
	\|> Enum.map(&Hashtag.normalize_name/1)
	\|> Enum.uniq()

	Map.put(opts, key, normalized_value)

	_ ->
	opts
	end
	end)
	end

	defp fetch_activities_query_ap_ids_ops(opts) do
	source_user = opts[:muting_user]
	ap_id_relationships = if source_user, do: [:mute, :reblog_mute], else: []

	ap_id_relationships =
	if opts[:blocking_user] && opts[:blocking_user] == source_user do
	[:block \| ap_id_relationships]
	else
	ap_id_relationships
	end

	preloaded_ap_ids = User.outgoing_relationships_ap_ids(source_user, ap_id_relationships)

	restrict_blocked_opts = Map.merge(%{blocked_users_ap_ids: preloaded_ap_ids[:block]}, opts)
	restrict_muted_opts = Map.merge(%{muted_users_ap_ids: preloaded_ap_ids[:mute]}, opts)

	restrict_muted_reblogs_opts =
	Map.merge(%{reblog_muted_users_ap_ids: preloaded_ap_ids[:reblog_mute]}, opts)

	{restrict_blocked_opts, restrict_muted_opts, restrict_muted_reblogs_opts}
	end

	def fetch_activities_query(recipients, opts \\ %{}) do
	opts = normalize_fetch_activities_query_opts(opts)

	{restrict_blocked_opts, restrict_muted_opts, restrict_muted_reblogs_opts} =
	fetch_activities_query_ap_ids_ops(opts)

	config = %{
	skip_thread_containment: Config.get([:instance, :skip_thread_containment])
	}

	query =
	Activity
	\|> maybe_preload_objects(opts)
	\|> maybe_preload_bookmarks(opts)
	\|> maybe_preload_report_notes(opts)
	\|> maybe_set_thread_muted_field(opts)
	\|> maybe_order(opts)
	\|> restrict_recipients(recipients, opts[:user])
	\|> restrict_replies(opts)
	\|> restrict_since(opts)
	\|> restrict_local(opts)
	\|> restrict_remote(opts)
	\|> restrict_actor(opts)
	\|> restrict_type(opts)
	\|> restrict_state(opts)
	\|> restrict_favorited_by(opts)
	\|> restrict_blocked(restrict_blocked_opts)
	\|> restrict_muted(restrict_muted_opts)
	\|> restrict_filtered(opts)
	\|> restrict_media(opts)
	\|> restrict_visibility(opts)
	\|> restrict_thread_visibility(opts, config)
	\|> restrict_reblogs(opts)
	\|> restrict_pinned(opts)
	\|> restrict_muted_reblogs(restrict_muted_reblogs_opts)
	\|> restrict_instance(opts)
	\|> restrict_announce_object_actor(opts)
	\|> restrict_filtered(opts)
	\|> Activity.restrict_deactivated_users()
	\|> exclude_poll_votes(opts)
	\|> exclude_chat_messages(opts)
	\|> exclude_invisible_actors(opts)
	\|> exclude_visibility(opts)

	if Config.feature_enabled?(:improved_hashtag_timeline) do
	query
	\|> restrict_hashtag_any(opts)
	\|> restrict_hashtag_all(opts)
	\|> restrict_hashtag_reject_any(opts)
	else
	query
	\|> restrict_embedded_tag_any(opts)
	\|> restrict_embedded_tag_all(opts)
	\|> restrict_embedded_tag_reject_any(opts)
	end
	end

	@doc """
	Fetch favorites activities of user with order by sort adds to favorites
	"""
	@spec fetch_favourites(User.t(), map(), Pagination.type()) :: list(Activity.t())
	def fetch_favourites(user, params \\ %{}, pagination \\ :keyset) do
	user.ap_id
	\|> Activity.Queries.by_actor()
	\|> Activity.Queries.by_type("Like")
	\|> Activity.with_joined_object()
	\|> Object.with_joined_activity()
	\|> select([like, object, activity], %{activity \| object: object, pagination_id: like.id})
	\|> order_by([like, _, _], desc_nulls_last: like.id)
	\|> Pagination.fetch_paginated(
	Map.merge(params, %{skip_order: true}),
	pagination
	)
	end

	defp maybe_update_cc(activities, [_ \| _] = list_memberships, %User{ap_id: user_ap_id}) do
	Enum.map(activities, fn
	%{data: %{"bcc" => [_ \| _] = bcc}} = activity ->
	if Enum.any?(bcc, &(&1 in list_memberships)) do
	update_in(activity.data["cc"], &[user_ap_id \| &1])
	else
	activity
	end

	activity ->
	activity
	end)
	end

	defp maybe_update_cc(activities, _, _), do: activities

	defp fetch_activities_bounded_query(query, recipients, recipients_with_public) do
	from(activity in query,
	where:
	fragment("? && ?", activity.recipients, ^recipients) or
	(fragment("? && ?", activity.recipients, ^recipients_with_public) and
	^Constants.as_public() in activity.recipients)
	)
	end

	def fetch_activities_bounded(
	recipients,
	recipients_with_public,
	opts \\ %{},
	pagination \\ :keyset
	) do
	fetch_activities_query([], opts)
	\|> fetch_activities_bounded_query(recipients, recipients_with_public)
	\|> Pagination.fetch_paginated(opts, pagination)
	\|> Enum.reverse()
	end

	@spec upload(Upload.source(), keyword()) :: {:ok, Object.t()} \| {:error, any()}
	def upload(file, opts \\ []) do
	with {:ok, data} <- Upload.store(file, opts) do
	obj_data = Maps.put_if_present(data, "actor", opts[:actor])

	Repo.insert(%Object{data: obj_data})
	end
	end

	@spec get_actor_url(any()) :: binary() \| nil
	defp get_actor_url(url) when is_binary(url), do: url
	defp get_actor_url(%{"href" => href}) when is_binary(href), do: href

	defp get_actor_url(url) when is_list(url) do
	url
	\|> List.first()
	\|> get_actor_url()
	end

	defp get_actor_url(_url), do: nil

	defp normalize_image(%{"url" => url}) do
	%{
	"type" => "Image",
	"url" => [%{"href" => url}]
	}
	end

	defp normalize_image(urls) when is_list(urls), do: urls \|> List.first() \|> normalize_image()
	defp normalize_image(_), do: nil

	defp object_to_user_data(data) do
	fields =
	data
	\|> Map.get("attachment", [])
	\|> Enum.filter(fn %{"type" => t} -> t == "PropertyValue" end)
	\|> Enum.map(fn fields -> Map.take(fields, ["name", "value"]) end)

	emojis =
	data
	\|> Map.get("tag", [])
	\|> Enum.filter(fn
	%{"type" => "Emoji"} -> true
	_ -> false
	end)
	\|> Map.new(fn %{"icon" => %{"url" => url}, "name" => name} ->
	{String.trim(name, ":"), url}
	end)

	is_locked = data["manuallyApprovesFollowers"] \|\| false
	capabilities = data["capabilities"] \|\| %{}
	accepts_chat_messages = capabilities["acceptsChatMessages"]
	data = Transmogrifier.maybe_fix_user_object(data)
	is_discoverable = data["discoverable"] \|\| false
	invisible = data["invisible"] \|\| false
	actor_type = data["type"] \|\| "Person"

	featured_address = data["featured"]
	{:ok, pinned_objects} = fetch_and_prepare_featured_from_ap_id(featured_address)

	public_key =
	if is_map(data["publicKey"]) && is_binary(data["publicKey"]["publicKeyPem"]) do
	data["publicKey"]["publicKeyPem"]
	else
	nil
	end

	shared_inbox =
	if is_map(data["endpoints"]) && is_binary(data["endpoints"]["sharedInbox"]) do
	data["endpoints"]["sharedInbox"]
	else
	nil
	end

	user_data = %{
	ap_id: data["id"],
	uri: get_actor_url(data["url"]),
	ap_enabled: true,
	banner: normalize_image(data["image"]),
	fields: fields,
	emoji: emojis,
	is_locked: is_locked,
	is_discoverable: is_discoverable,
	invisible: invisible,
	avatar: normalize_image(data["icon"]),
	name: data["name"],
	follower_address: data["followers"],
	following_address: data["following"],
	featured_address: featured_address,
	bio: data["summary"] \|\| "",
	actor_type: actor_type,
	also_known_as: Map.get(data, "alsoKnownAs", []),
	public_key: public_key,
	inbox: data["inbox"],
	shared_inbox: shared_inbox,
	accepts_chat_messages: accepts_chat_messages,
	pinned_objects: pinned_objects
	}

	# nickname can be nil because of virtual actors
	if data["preferredUsername"] do
	Map.put(
	user_data,
	:nickname,
	"#{data["preferredUsername"]}@#{URI.parse(data["id"]).host}"
	)
	else
	Map.put(user_data, :nickname, nil)
	end
	end

	def fetch_follow_information_for_user(user) do
	with {:ok, following_data} <-
	Fetcher.fetch_and_contain_remote_object_from_id(user.following_address),
	{:ok, hide_follows} <- collection_private(following_data),
	{:ok, followers_data} <-
	Fetcher.fetch_and_contain_remote_object_from_id(user.follower_address),
	{:ok, hide_followers} <- collection_private(followers_data) do
	{:ok,
	%{
	hide_follows: hide_follows,
	follower_count: normalize_counter(followers_data["totalItems"]),
	following_count: normalize_counter(following_data["totalItems"]),
	hide_followers: hide_followers
	}}
	else
	{:error, _} = e -> e
	e -> {:error, e}
	end
	end

	defp normalize_counter(counter) when is_integer(counter), do: counter
	defp normalize_counter(_), do: 0

	def maybe_update_follow_information(user_data) do
	with {:enabled, true} <- {:enabled, Config.get([:instance, :external_user_synchronization])},
	{_, true} <- {:user_type_check, user_data[:type] in ["Person", "Service"]},
	{_, true} <-
	{:collections_available,
	!!(user_data[:following_address] && user_data[:follower_address])},
	{:ok, info} <-
	fetch_follow_information_for_user(user_data) do
	info = Map.merge(user_data[:info] \|\| %{}, info)

	user_data
	\|> Map.put(:info, info)
	else
	{:user_type_check, false} ->
	user_data

	{:collections_available, false} ->
	user_data

	{:enabled, false} ->
	user_data

	e ->
	Logger.error(
	"Follower/Following counter update for #{user_data.ap_id} failed.\n" <> inspect(e)
	)

	user_data
	end
	end

	defp collection_private(%{"first" => %{"type" => type}})
	when type in ["CollectionPage", "OrderedCollectionPage"],
	do: {:ok, false}

	defp collection_private(%{"first" => first}) do
	with {:ok, %{"type" => type}} when type in ["CollectionPage", "OrderedCollectionPage"] <-
	Fetcher.fetch_and_contain_remote_object_from_id(first) do
	{:ok, false}
	else
	{:error, {:ok, %{status: code}}} when code in [401, 403] -> {:ok, true}
	{:error, _} = e -> e
	e -> {:error, e}
	end
	end

	defp collection_private(_data), do: {:ok, true}

	def user_data_from_user_object(data) do
	with {:ok, data} <- MRF.filter(data) do
	{:ok, object_to_user_data(data)}
	else
	e -> {:error, e}
	end
	end

	def fetch_and_prepare_user_from_ap_id(ap_id) do
	with {:ok, data} <- Fetcher.fetch_and_contain_remote_object_from_id(ap_id),
	{:ok, data} <- user_data_from_user_object(data) do
	{:ok, maybe_update_follow_information(data)}
	else
	# If this has been deleted, only log a debug and not an error
	{:error, "Object has been deleted" = e} ->
	Logger.debug("Could not decode user at fetch #{ap_id}, #{inspect(e)}")
	{:error, e}

	{:error, {:reject, reason} = e} ->
	Logger.info("Rejected user #{ap_id}: #{inspect(reason)}")
	{:error, e}

	{:error, e} ->
	Logger.error("Could not decode user at fetch #{ap_id}, #{inspect(e)}")
	{:error, e}
	end
	end

	def maybe_handle_clashing_nickname(data) do
	with nickname when is_binary(nickname) <- data[:nickname],
	%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 #{data[:nickname]}, but the ap id #{data[:ap_id]} is the same as the new user. Race condition? Not changing anything."
	)

	_ ->
	nil
	end
	end

	def pin_data_from_featured_collection(%{
	"type" => type,
	"orderedItems" => objects
	})
	when type in ["OrderedCollection", "Collection"] do
	Map.new(objects, fn %{"id" => object_ap_id} -> {object_ap_id, NaiveDateTime.utc_now()} end)
	end

	def fetch_and_prepare_featured_from_ap_id(nil) do
	{:ok, %{}}
	end

	def fetch_and_prepare_featured_from_ap_id(ap_id) do
	with {:ok, data} <- Fetcher.fetch_and_contain_remote_object_from_id(ap_id) do
	{:ok, pin_data_from_featured_collection(data)}
	else
	e ->
	Logger.error("Could not decode featured collection at fetch #{ap_id}, #{inspect(e)}")
	{:ok, %{}}
	end
	end

	def pinned_fetch_task(nil), do: nil

	def pinned_fetch_task(%{pinned_objects: pins}) do
	if Enum.all?(pins, fn {ap_id, _} ->
	Object.get_cached_by_ap_id(ap_id) \|\|
	match?({:ok, _object}, Fetcher.fetch_object_from_id(ap_id))
	end) do
	:ok
	else
	:error
	end
	end

	def make_user_from_ap_id(ap_id) do
	user = User.get_cached_by_ap_id(ap_id)

	if user && !User.ap_enabled?(user) do
	Transmogrifier.upgrade_user_from_ap_id(ap_id)
	else
	with {:ok, data} <- fetch_and_prepare_user_from_ap_id(ap_id) do
	{:ok, _pid} = Task.start(fn -> pinned_fetch_task(data) end)

	if user do
	user
	\|> User.remote_user_changeset(data)
	\|> User.update_and_set_cache()
	else
	maybe_handle_clashing_nickname(data)

	data
	\|> User.remote_user_changeset()
	\|> Repo.insert()
	\|> User.set_cache()
	end
	end
	end
	end

	def make_user_from_nickname(nickname) do
	with {:ok, %{"ap_id" => ap_id}} when not is_nil(ap_id) <- WebFinger.finger(nickname) do
	make_user_from_ap_id(ap_id)
	else
	_e -> {:error, "No AP id in WebFinger"}
	end
	end

	# filter out broken threads
	defp contain_broken_threads(%Activity{} = activity, %User{} = user) do
	entire_thread_visible_for_user?(activity, user)
	end

	# do post-processing on a specific activity
	def contain_activity(%Activity{} = activity, %User{} = user) do
	contain_broken_threads(activity, user)
	end

	def fetch_direct_messages_query do
	Activity
	\|> restrict_type(%{type: "Create"})
	\|> restrict_visibility(%{visibility: "direct"})
	\|> order_by([activity], asc: activity.id)
	end
	end
	diff --git a/lib/pleroma/web/activity_pub/object_validator.ex b/lib/pleroma/web/activity_pub/object_validator.ex
	index 50999539c..6e40d8b72 100644
	--- a/lib/pleroma/web/activity_pub/object_validator.ex
	+++ b/lib/pleroma/web/activity_pub/object_validator.ex
	@@ -1,237 +1,238 @@
	# Pleroma: A lightweight social networking server
	# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
	# SPDX-License-Identifier: AGPL-3.0-only

	defmodule Pleroma.Web.ActivityPub.ObjectValidator do
	@moduledoc """
	This module is responsible for validating an object (which can be an activity)
	and checking if it is both well formed and also compatible with our view of
	the system.
	"""

	@behaviour Pleroma.Web.ActivityPub.ObjectValidator.Validating

	alias Pleroma.Activity
	alias Pleroma.EctoType.ActivityPub.ObjectValidators
	alias Pleroma.Object
	alias Pleroma.Object.Containment
	alias Pleroma.User
	alias Pleroma.Web.ActivityPub.ObjectValidators.AcceptRejectValidator
	alias Pleroma.Web.ActivityPub.ObjectValidators.AddRemoveValidator
	alias Pleroma.Web.ActivityPub.ObjectValidators.AnnounceValidator
	alias Pleroma.Web.ActivityPub.ObjectValidators.AnswerValidator
	- alias Pleroma.Web.ActivityPub.ObjectValidators.ArticleNoteValidator
	+ alias Pleroma.Web.ActivityPub.ObjectValidators.ArticleNotePageValidator
	alias Pleroma.Web.ActivityPub.ObjectValidators.AudioVideoValidator
	alias Pleroma.Web.ActivityPub.ObjectValidators.BlockValidator
	alias Pleroma.Web.ActivityPub.ObjectValidators.ChatMessageValidator
	alias Pleroma.Web.ActivityPub.ObjectValidators.CreateChatMessageValidator
	alias Pleroma.Web.ActivityPub.ObjectValidators.CreateGenericValidator
	alias Pleroma.Web.ActivityPub.ObjectValidators.DeleteValidator
	alias Pleroma.Web.ActivityPub.ObjectValidators.EmojiReactValidator
	alias Pleroma.Web.ActivityPub.ObjectValidators.EventValidator
	alias Pleroma.Web.ActivityPub.ObjectValidators.FollowValidator
	alias Pleroma.Web.ActivityPub.ObjectValidators.LikeValidator
	alias Pleroma.Web.ActivityPub.ObjectValidators.QuestionValidator
	alias Pleroma.Web.ActivityPub.ObjectValidators.UndoValidator
	alias Pleroma.Web.ActivityPub.ObjectValidators.UpdateValidator

	@impl true
	def validate(object, meta)

	def validate(%{"type" => "Block"} = block_activity, meta) do
	with {:ok, block_activity} <-
	block_activity
	\|> BlockValidator.cast_and_validate()
	\|> Ecto.Changeset.apply_action(:insert) do
	block_activity = stringify_keys(block_activity)
	outgoing_blocks = Pleroma.Config.get([:activitypub, :outgoing_blocks])

	meta =
	if !outgoing_blocks do
	Keyword.put(meta, :do_not_federate, true)
	else
	meta
	end

	{:ok, block_activity, meta}
	end
	end

	def validate(%{"type" => "Undo"} = object, meta) do
	with {:ok, object} <-
	object
	\|> UndoValidator.cast_and_validate()
	\|> Ecto.Changeset.apply_action(:insert) do
	object = stringify_keys(object)
	undone_object = Activity.get_by_ap_id(object["object"])

	meta =
	meta
	\|> Keyword.put(:object_data, undone_object.data)

	{:ok, object, meta}
	end
	end

	def validate(%{"type" => "Delete"} = object, meta) do
	with cng <- DeleteValidator.cast_and_validate(object),
	do_not_federate <- DeleteValidator.do_not_federate?(cng),
	{:ok, object} <- Ecto.Changeset.apply_action(cng, :insert) do
	object = stringify_keys(object)
	meta = Keyword.put(meta, :do_not_federate, do_not_federate)
	{:ok, object, meta}
	end
	end

	def validate(
	%{"type" => "Create", "object" => %{"type" => "ChatMessage"} = object} = create_activity,
	meta
	) do
	with {:ok, object_data} <- cast_and_apply(object),
	meta = Keyword.put(meta, :object_data, object_data \|> stringify_keys),
	{:ok, create_activity} <-
	create_activity
	\|> CreateChatMessageValidator.cast_and_validate(meta)
	\|> Ecto.Changeset.apply_action(:insert) do
	create_activity = stringify_keys(create_activity)
	{:ok, create_activity, meta}
	end
	end

	def validate(
	%{"type" => "Create", "object" => %{"type" => objtype} = object} = create_activity,
	meta
	)
	- when objtype in ~w[Question Answer Audio Video Event Article Note] do
	+ when objtype in ~w[Question Answer Audio Video Event Article Note Page] do
	with {:ok, object_data} <- cast_and_apply(object),
	meta = Keyword.put(meta, :object_data, object_data \|> stringify_keys),
	{:ok, create_activity} <-
	create_activity
	\|> CreateGenericValidator.cast_and_validate(meta)
	\|> Ecto.Changeset.apply_action(:insert) do
	create_activity = stringify_keys(create_activity)
	{:ok, create_activity, meta}
	end
	end

	def validate(%{"type" => type} = object, meta)
	- when type in ~w[Event Question Audio Video Article Note] do
	+ when type in ~w[Event Question Audio Video Article Note Page] do
	validator =
	case type do
	"Event" -> EventValidator
	"Question" -> QuestionValidator
	"Audio" -> AudioVideoValidator
	"Video" -> AudioVideoValidator
	- "Article" -> ArticleNoteValidator
	- "Note" -> ArticleNoteValidator
	+ "Article" -> ArticleNotePageValidator
	+ "Note" -> ArticleNotePageValidator
	+ "Page" -> ArticleNotePageValidator
	end

	with {:ok, object} <-
	object
	\|> validator.cast_and_validate()
	\|> Ecto.Changeset.apply_action(:insert) do
	object = stringify_keys(object)

	# Insert copy of hashtags as strings for the non-hashtag table indexing
	tag = (object["tag"] \|\| []) ++ Object.hashtags(%Object{data: object})
	object = Map.put(object, "tag", tag)

	{:ok, object, meta}
	end
	end

	def validate(%{"type" => type} = object, meta)
	when type in ~w[Accept Reject Follow Update Like EmojiReact Announce
	ChatMessage Answer] do
	validator =
	case type do
	"Accept" -> AcceptRejectValidator
	"Reject" -> AcceptRejectValidator
	"Follow" -> FollowValidator
	"Update" -> UpdateValidator
	"Like" -> LikeValidator
	"EmojiReact" -> EmojiReactValidator
	"Announce" -> AnnounceValidator
	"ChatMessage" -> ChatMessageValidator
	"Answer" -> AnswerValidator
	end

	with {:ok, object} <-
	object
	\|> validator.cast_and_validate()
	\|> Ecto.Changeset.apply_action(:insert) do
	object = stringify_keys(object)
	{:ok, object, meta}
	end
	end

	def validate(%{"type" => type} = object, meta) when type in ~w(Add Remove) do
	with {:ok, object} <-
	object
	\|> AddRemoveValidator.cast_and_validate()
	\|> Ecto.Changeset.apply_action(:insert) do
	object = stringify_keys(object)
	{:ok, object, meta}
	end
	end

	def validate(o, m), do: {:error, {:validator_not_set, {o, m}}}

	def cast_and_apply(%{"type" => "ChatMessage"} = object) do
	ChatMessageValidator.cast_and_apply(object)
	end

	def cast_and_apply(%{"type" => "Question"} = object) do
	QuestionValidator.cast_and_apply(object)
	end

	def cast_and_apply(%{"type" => "Answer"} = object) do
	AnswerValidator.cast_and_apply(object)
	end

	def cast_and_apply(%{"type" => type} = object) when type in ~w[Audio Video] do
	AudioVideoValidator.cast_and_apply(object)
	end

	def cast_and_apply(%{"type" => "Event"} = object) do
	EventValidator.cast_and_apply(object)
	end

	- def cast_and_apply(%{"type" => type} = object) when type in ~w[Article Note] do
	- ArticleNoteValidator.cast_and_apply(object)
	+ def cast_and_apply(%{"type" => type} = object) when type in ~w[Article Note Page] do
	+ ArticleNotePageValidator.cast_and_apply(object)
	end

	def cast_and_apply(o), do: {:error, {:validator_not_set, o}}

	# is_struct/1 appears in Elixir 1.11
	def stringify_keys(%{__struct__: _} = object) do
	object
	\|> Map.from_struct()
	\|> stringify_keys
	end

	def stringify_keys(object) when is_map(object) do
	object
	\|> Map.new(fn {key, val} -> {to_string(key), stringify_keys(val)} end)
	end

	def stringify_keys(object) when is_list(object) do
	object
	\|> Enum.map(&stringify_keys/1)
	end

	def stringify_keys(object), do: object

	def fetch_actor(object) do
	with actor <- Containment.get_actor(object),
	{:ok, actor} <- ObjectValidators.ObjectID.cast(actor) do
	User.get_or_fetch_by_ap_id(actor)
	end
	end

	def fetch_actor_and_object(object) do
	fetch_actor(object)
	Object.normalize(object["object"], fetch: true)
	:ok
	end
	end
	diff --git a/lib/pleroma/web/activity_pub/object_validators/article_note_validator.ex b/lib/pleroma/web/activity_pub/object_validators/article_note_page_validator.ex
	similarity index 96%
	rename from lib/pleroma/web/activity_pub/object_validators/article_note_validator.ex
	rename to lib/pleroma/web/activity_pub/object_validators/article_note_page_validator.ex
	index 193f85f49..0d987116c 100644
	--- a/lib/pleroma/web/activity_pub/object_validators/article_note_validator.ex
	+++ b/lib/pleroma/web/activity_pub/object_validators/article_note_page_validator.ex
	@@ -1,123 +1,123 @@
	# Pleroma: A lightweight social networking server
	# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
	# SPDX-License-Identifier: AGPL-3.0-only

	-defmodule Pleroma.Web.ActivityPub.ObjectValidators.ArticleNoteValidator do
	+defmodule Pleroma.Web.ActivityPub.ObjectValidators.ArticleNotePageValidator do
	use Ecto.Schema

	alias Pleroma.EctoType.ActivityPub.ObjectValidators
	alias Pleroma.Web.ActivityPub.ObjectValidators.AttachmentValidator
	alias Pleroma.Web.ActivityPub.ObjectValidators.CommonFixes
	alias Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations
	alias Pleroma.Web.ActivityPub.ObjectValidators.TagValidator
	alias Pleroma.Web.ActivityPub.Transmogrifier

	import Ecto.Changeset

	@primary_key false
	@derive Jason.Encoder

	embedded_schema do
	field(:id, ObjectValidators.ObjectID, primary_key: true)
	field(:to, ObjectValidators.Recipients, default: [])
	field(:cc, ObjectValidators.Recipients, default: [])
	field(:bto, ObjectValidators.Recipients, default: [])
	field(:bcc, ObjectValidators.Recipients, default: [])
	embeds_many(:tag, TagValidator)
	field(:type, :string)

	field(:name, :string)
	field(:summary, :string)
	field(:content, :string)

	field(:context, :string)
	# short identifier for PleromaFE to group statuses by context
	field(:context_id, :integer)

	# TODO: Remove actor on objects
	field(:actor, ObjectValidators.ObjectID)

	field(:attributedTo, ObjectValidators.ObjectID)
	field(:published, ObjectValidators.DateTime)
	field(:emoji, ObjectValidators.Emoji, default: %{})
	field(:sensitive, :boolean, default: false)
	embeds_many(:attachment, AttachmentValidator)
	field(:replies_count, :integer, default: 0)
	field(:like_count, :integer, default: 0)
	field(:announcement_count, :integer, default: 0)
	field(:inReplyTo, ObjectValidators.ObjectID)
	field(:url, ObjectValidators.Uri)

	field(:likes, {:array, ObjectValidators.ObjectID}, default: [])
	field(:announcements, {:array, ObjectValidators.ObjectID}, default: [])

	field(:replies, {:array, ObjectValidators.ObjectID}, default: [])
	end

	def cast_and_apply(data) do
	data
	\|> cast_data
	\|> apply_action(:insert)
	end

	def cast_and_validate(data) do
	data
	\|> cast_data()
	\|> validate_data()
	end

	def cast_data(data) do
	%__MODULE__{}
	\|> changeset(data)
	end

	defp fix_url(%{"url" => url} = data) when is_bitstring(url), do: data
	defp fix_url(%{"url" => url} = data) when is_map(url), do: Map.put(data, "url", url["href"])
	defp fix_url(data), do: data

	defp fix_tag(%{"tag" => tag} = data) when is_list(tag), do: data
	defp fix_tag(%{"tag" => tag} = data) when is_map(tag), do: Map.put(data, "tag", [tag])
	defp fix_tag(data), do: Map.drop(data, ["tag"])

	defp fix_replies(%{"replies" => %{"first" => %{"items" => replies}}} = data)
	when is_list(replies),
	do: Map.put(data, "replies", replies)

	defp fix_replies(%{"replies" => %{"items" => replies}} = data) when is_list(replies),
	do: Map.put(data, "replies", replies)

	defp fix_replies(%{"replies" => replies} = data) when is_bitstring(replies),
	do: Map.drop(data, ["replies"])

	defp fix_replies(data), do: data

	defp fix(data) do
	data
	\|> CommonFixes.fix_actor()
	\|> CommonFixes.fix_object_defaults()
	\|> fix_url()
	\|> fix_tag()
	\|> fix_replies()
	\|> Transmogrifier.fix_emoji()
	\|> Transmogrifier.fix_content_map()
	end

	def changeset(struct, data) do
	data = fix(data)

	struct
	\|> cast(data, __schema__(:fields) -- [:attachment, :tag])
	\|> cast_embed(:attachment)
	\|> cast_embed(:tag)
	end

	defp validate_data(data_cng) do
	data_cng
	- \|> validate_inclusion(:type, ["Article", "Note"])
	+ \|> validate_inclusion(:type, ["Article", "Note", "Page"])
	\|> validate_required([:id, :actor, :attributedTo, :type, :context, :context_id])
	\|> CommonValidations.validate_any_presence([:cc, :to])
	\|> CommonValidations.validate_fields_match([:actor, :attributedTo])
	\|> CommonValidations.validate_actor_presence()
	\|> CommonValidations.validate_host_match()
	end
	end
	diff --git a/lib/pleroma/web/activity_pub/side_effects.ex b/lib/pleroma/web/activity_pub/side_effects.ex
	index 1eca1cb31..b0ec84ade 100644
	--- a/lib/pleroma/web/activity_pub/side_effects.ex
	+++ b/lib/pleroma/web/activity_pub/side_effects.ex
	@@ -1,538 +1,538 @@
	# Pleroma: A lightweight social networking server
	# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
	# SPDX-License-Identifier: AGPL-3.0-only

	defmodule Pleroma.Web.ActivityPub.SideEffects do
	@moduledoc """
	This module looks at an inserted object and executes the side effects that it
	implies. For example, a `Like` activity will increase the like count on the
	liked object, a `Follow` activity will add the user to the follower
	collection, and so on.
	"""
	alias Pleroma.Activity
	alias Pleroma.Activity.Ir.Topics
	alias Pleroma.Chat
	alias Pleroma.Chat.MessageReference
	alias Pleroma.FollowingRelationship
	alias Pleroma.Notification
	alias Pleroma.Object
	alias Pleroma.Repo
	alias Pleroma.User
	alias Pleroma.Web.ActivityPub.ActivityPub
	alias Pleroma.Web.ActivityPub.Builder
	alias Pleroma.Web.ActivityPub.Pipeline
	alias Pleroma.Web.ActivityPub.Utils
	alias Pleroma.Web.Push
	alias Pleroma.Web.Streamer

	require Logger

	@cachex Pleroma.Config.get([:cachex, :provider], Cachex)
	@logger Pleroma.Config.get([:side_effects, :logger], Logger)

	@behaviour Pleroma.Web.ActivityPub.SideEffects.Handling

	defp ap_streamer, do: Pleroma.Config.get([:side_effects, :ap_streamer], ActivityPub)

	@impl true
	def handle(object, meta \\ [])

	# Task this handles
	# - Follows
	# - Sends a notification
	@impl true
	def handle(
	%{
	data: %{
	"actor" => actor,
	"type" => "Accept",
	"object" => follow_activity_id
	}
	} = object,
	meta
	) do
	with %Activity{actor: follower_id} = follow_activity <-
	Activity.get_by_ap_id(follow_activity_id),
	%User{} = followed <- User.get_cached_by_ap_id(actor),
	%User{} = follower <- User.get_cached_by_ap_id(follower_id),
	{:ok, follow_activity} <- Utils.update_follow_state_for_all(follow_activity, "accept"),
	{:ok, _follower, followed} <-
	FollowingRelationship.update(follower, followed, :follow_accept) do
	Notification.update_notification_type(followed, follow_activity)
	end

	{:ok, object, meta}
	end

	# Task this handles
	# - Rejects all existing follow activities for this person
	# - Updates the follow state
	# - Dismisses notification
	@impl true
	def handle(
	%{
	data: %{
	"actor" => actor,
	"type" => "Reject",
	"object" => follow_activity_id
	}
	} = object,
	meta
	) do
	with %Activity{actor: follower_id} = follow_activity <-
	Activity.get_by_ap_id(follow_activity_id),
	%User{} = followed <- User.get_cached_by_ap_id(actor),
	%User{} = follower <- User.get_cached_by_ap_id(follower_id),
	{:ok, _follow_activity} <- Utils.update_follow_state_for_all(follow_activity, "reject") do
	FollowingRelationship.update(follower, followed, :follow_reject)
	Notification.dismiss(follow_activity)
	end

	{:ok, object, meta}
	end

	# Tasks this handle
	# - Follows if possible
	# - Sends a notification
	# - Generates accept or reject if appropriate
	@impl true
	def handle(
	%{
	data: %{
	"id" => follow_id,
	"type" => "Follow",
	"object" => followed_user,
	"actor" => following_user
	}
	} = object,
	meta
	) do
	with %User{} = follower <- User.get_cached_by_ap_id(following_user),
	%User{} = followed <- User.get_cached_by_ap_id(followed_user),
	{_, {:ok, _, _}, _, _} <-
	{:following, User.follow(follower, followed, :follow_pending), follower, followed} do
	if followed.local && !followed.is_locked do
	{:ok, accept_data, _} = Builder.accept(followed, object)
	{:ok, _activity, _} = Pipeline.common_pipeline(accept_data, local: true)
	end
	else
	{:following, {:error, _}, _follower, followed} ->
	{:ok, reject_data, _} = Builder.reject(followed, object)
	{:ok, _activity, _} = Pipeline.common_pipeline(reject_data, local: true)

	_ ->
	nil
	end

	{:ok, notifications} = Notification.create_notifications(object, do_send: false)

	meta =
	meta
	\|> add_notifications(notifications)

	updated_object = Activity.get_by_ap_id(follow_id)

	{:ok, updated_object, meta}
	end

	# Tasks this handles:
	# - Unfollow and block
	@impl true
	def handle(
	%{data: %{"type" => "Block", "object" => blocked_user, "actor" => blocking_user}} =
	object,
	meta
	) do
	with %User{} = blocker <- User.get_cached_by_ap_id(blocking_user),
	%User{} = blocked <- User.get_cached_by_ap_id(blocked_user) do
	User.block(blocker, blocked)
	end

	{:ok, object, meta}
	end

	# Tasks this handles:
	# - Update the user
	#
	# For a local user, we also get a changeset with the full information, so we
	# can update non-federating, non-activitypub settings as well.
	@impl true
	def handle(%{data: %{"type" => "Update", "object" => updated_object}} = object, meta) do
	if changeset = Keyword.get(meta, :user_update_changeset) do
	changeset
	\|> User.update_and_set_cache()
	else
	{:ok, new_user_data} = ActivityPub.user_data_from_user_object(updated_object)

	User.get_by_ap_id(updated_object["id"])
	\|> User.remote_user_changeset(new_user_data)
	\|> User.update_and_set_cache()
	end

	{:ok, object, meta}
	end

	# Tasks this handles:
	# - Add like to object
	# - Set up notification
	@impl true
	def handle(%{data: %{"type" => "Like"}} = object, meta) do
	liked_object = Object.get_by_ap_id(object.data["object"])
	Utils.add_like_to_object(object, liked_object)

	Notification.create_notifications(object)

	{:ok, object, meta}
	end

	# Tasks this handles
	# - Actually create object
	# - Rollback if we couldn't create it
	# - Increase the user note count
	# - Increase the reply count
	# - Increase replies count
	# - Set up ActivityExpiration
	# - Set up notifications
	@impl true
	def handle(%{data: %{"type" => "Create"}} = activity, meta) do
	with {:ok, object, meta} <- handle_object_creation(meta[:object_data], meta),
	%User{} = user <- User.get_cached_by_ap_id(activity.data["actor"]) do
	{:ok, notifications} = Notification.create_notifications(activity, do_send: false)
	{:ok, _user} = ActivityPub.increase_note_count_if_public(user, object)

	if in_reply_to = object.data["inReplyTo"] && object.data["type"] != "Answer" do
	Object.increase_replies_count(in_reply_to)
	end

	reply_depth = (meta[:depth] \|\| 0) + 1

	# FIXME: Force inReplyTo to replies
	if Pleroma.Web.Federator.allowed_thread_distance?(reply_depth) and
	object.data["replies"] != nil do
	for reply_id <- object.data["replies"] do
	Pleroma.Workers.RemoteFetcherWorker.enqueue("fetch_remote", %{
	"id" => reply_id,
	"depth" => reply_depth
	})
	end
	end

	ConcurrentLimiter.limit(Pleroma.Web.RichMedia.Helpers, fn ->
	Task.start(fn -> Pleroma.Web.RichMedia.Helpers.fetch_data_for_activity(activity) end)
	end)

	meta =
	meta
	\|> add_notifications(notifications)

	{:ok, activity, meta}
	else
	e -> Repo.rollback(e)
	end
	end

	# Tasks this handles:
	# - Add announce to object
	# - Set up notification
	# - Stream out the announce
	@impl true
	def handle(%{data: %{"type" => "Announce"}} = object, meta) do
	announced_object = Object.get_by_ap_id(object.data["object"])
	user = User.get_cached_by_ap_id(object.data["actor"])

	Utils.add_announce_to_object(object, announced_object)

	if !User.is_internal_user?(user) do
	Notification.create_notifications(object)

	object
	\|> Topics.get_activity_topics()
	\|> Streamer.stream(object)
	end

	{:ok, object, meta}
	end

	@impl true
	def handle(%{data: %{"type" => "Undo", "object" => undone_object}} = object, meta) do
	with undone_object <- Activity.get_by_ap_id(undone_object),
	:ok <- handle_undoing(undone_object) do
	{:ok, object, meta}
	end
	end

	# Tasks this handles:
	# - Add reaction to object
	# - Set up notification
	@impl true
	def handle(%{data: %{"type" => "EmojiReact"}} = object, meta) do
	reacted_object = Object.get_by_ap_id(object.data["object"])
	Utils.add_emoji_reaction_to_object(object, reacted_object)

	Notification.create_notifications(object)

	{:ok, object, meta}
	end

	# Tasks this handles:
	# - Delete and unpins the create activity
	# - Replace object with Tombstone
	# - Set up notification
	# - Reduce the user note count
	# - Reduce the reply count
	# - Stream out the activity
	@impl true
	def handle(%{data: %{"type" => "Delete", "object" => deleted_object}} = object, meta) do
	deleted_object =
	Object.normalize(deleted_object, fetch: false) \|\|
	User.get_cached_by_ap_id(deleted_object)

	result =
	case deleted_object do
	%Object{} ->
	with {:ok, deleted_object, _activity} <- Object.delete(deleted_object),
	{_, actor} when is_binary(actor) <- {:actor, deleted_object.data["actor"]},
	%User{} = user <- User.get_cached_by_ap_id(actor) do
	User.remove_pinned_object_id(user, deleted_object.data["id"])

	{:ok, user} = ActivityPub.decrease_note_count_if_public(user, deleted_object)

	if in_reply_to = deleted_object.data["inReplyTo"] do
	Object.decrease_replies_count(in_reply_to)
	end

	MessageReference.delete_for_object(deleted_object)

	ap_streamer().stream_out(object)
	ap_streamer().stream_out_participations(deleted_object, user)
	:ok
	else
	{:actor, _} ->
	@logger.error("The object doesn't have an actor: #{inspect(deleted_object)}")
	:no_object_actor
	end

	%User{} ->
	with {:ok, _} <- User.delete(deleted_object) do
	:ok
	end
	end

	if result == :ok do
	Notification.create_notifications(object)
	{:ok, object, meta}
	else
	{:error, result}
	end
	end

	# Tasks this handles:
	# - adds pin to user
	# - removes expiration job for pinned activity, if was set for expiration
	@impl true
	def handle(%{data: %{"type" => "Add"} = data} = object, meta) do
	with %User{} = user <- User.get_cached_by_ap_id(data["actor"]),
	{:ok, _user} <- User.add_pinned_object_id(user, data["object"]) do
	# if pinned activity was scheduled for deletion, we remove job
	if expiration = Pleroma.Workers.PurgeExpiredActivity.get_expiration(meta[:activity_id]) do
	Oban.cancel_job(expiration.id)
	end

	{:ok, object, meta}
	else
	nil ->
	{:error, :user_not_found}

	{:error, changeset} ->
	if changeset.errors[:pinned_objects] do
	{:error, :pinned_statuses_limit_reached}
	else
	changeset.errors
	end
	end
	end

	# Tasks this handles:
	# - removes pin from user
	# - removes corresponding Add activity
	# - if activity had expiration, recreates activity expiration job
	@impl true
	def handle(%{data: %{"type" => "Remove"} = data} = object, meta) do
	with %User{} = user <- User.get_cached_by_ap_id(data["actor"]),
	{:ok, _user} <- User.remove_pinned_object_id(user, data["object"]) do
	data["object"]
	\|> Activity.add_by_params_query(user.ap_id, user.featured_address)
	\|> Repo.delete_all()

	# if pinned activity was scheduled for deletion, we reschedule it for deletion
	if meta[:expires_at] do
	# MRF.ActivityExpirationPolicy used UTC timestamps for expires_at in original implementation
	{:ok, expires_at} =
	Pleroma.EctoType.ActivityPub.ObjectValidators.DateTime.cast(meta[:expires_at])

	Pleroma.Workers.PurgeExpiredActivity.enqueue(%{
	activity_id: meta[:activity_id],
	expires_at: expires_at
	})
	end

	{:ok, object, meta}
	else
	nil -> {:error, :user_not_found}
	error -> error
	end
	end

	# Nothing to do
	@impl true
	def handle(object, meta) do
	{:ok, object, meta}
	end

	def handle_object_creation(%{"type" => "ChatMessage"} = object, meta) do
	with {:ok, object, meta} <- Pipeline.common_pipeline(object, meta) do
	actor = User.get_cached_by_ap_id(object.data["actor"])
	recipient = User.get_cached_by_ap_id(hd(object.data["to"]))

	streamables =
	[[actor, recipient], [recipient, actor]]
	\|> Enum.uniq()
	\|> Enum.map(fn [user, other_user] ->
	if user.local do
	{:ok, chat} = Chat.bump_or_create(user.id, other_user.ap_id)
	{:ok, cm_ref} = MessageReference.create(chat, object, user.ap_id != actor.ap_id)

	@cachex.put(
	:chat_message_id_idempotency_key_cache,
	cm_ref.id,
	meta[:idempotency_key]
	)

	{
	["user", "user:pleroma_chat"],
	{user, %{cm_ref \| chat: chat, object: object}}
	}
	end
	end)
	\|> Enum.filter(& &1)

	meta =
	meta
	\|> add_streamables(streamables)

	{:ok, object, meta}
	end
	end

	def handle_object_creation(%{"type" => "Answer"} = object_map, meta) do
	with {:ok, object, meta} <- Pipeline.common_pipeline(object_map, meta) do
	Object.increase_vote_count(
	object.data["inReplyTo"],
	object.data["name"],
	object.data["actor"]
	)

	{:ok, object, meta}
	end
	end

	def handle_object_creation(%{"type" => objtype} = object, meta)
	- when objtype in ~w[Audio Video Question Event Article Note] do
	+ when objtype in ~w[Audio Video Question Event Article Note Page] do
	with {:ok, object, meta} <- Pipeline.common_pipeline(object, meta) do
	{:ok, object, meta}
	end
	end

	# Nothing to do
	def handle_object_creation(object, meta) do
	{:ok, object, meta}
	end

	defp undo_like(nil, object), do: delete_object(object)

	defp undo_like(%Object{} = liked_object, object) do
	with {:ok, _} <- Utils.remove_like_from_object(object, liked_object) do
	delete_object(object)
	end
	end

	def handle_undoing(%{data: %{"type" => "Like"}} = object) do
	object.data["object"]
	\|> Object.get_by_ap_id()
	\|> undo_like(object)
	end

	def handle_undoing(%{data: %{"type" => "EmojiReact"}} = object) do
	with %Object{} = reacted_object <- Object.get_by_ap_id(object.data["object"]),
	{:ok, _} <- Utils.remove_emoji_reaction_from_object(object, reacted_object),
	{:ok, _} <- Repo.delete(object) do
	:ok
	end
	end

	def handle_undoing(%{data: %{"type" => "Announce"}} = object) do
	with %Object{} = liked_object <- Object.get_by_ap_id(object.data["object"]),
	{:ok, _} <- Utils.remove_announce_from_object(object, liked_object),
	{:ok, _} <- Repo.delete(object) do
	:ok
	end
	end

	def handle_undoing(
	%{data: %{"type" => "Block", "actor" => blocker, "object" => blocked}} = object
	) do
	with %User{} = blocker <- User.get_cached_by_ap_id(blocker),
	%User{} = blocked <- User.get_cached_by_ap_id(blocked),
	{:ok, _} <- User.unblock(blocker, blocked),
	{:ok, _} <- Repo.delete(object) do
	:ok
	end
	end

	def handle_undoing(object), do: {:error, ["don't know how to handle", object]}

	@spec delete_object(Object.t()) :: :ok \| {:error, Ecto.Changeset.t()}
	defp delete_object(object) do
	with {:ok, _} <- Repo.delete(object), do: :ok
	end

	defp send_notifications(meta) do
	Keyword.get(meta, :notifications, [])
	\|> Enum.each(fn notification ->
	Streamer.stream(["user", "user:notification"], notification)
	Push.send(notification)
	end)

	meta
	end

	defp send_streamables(meta) do
	Keyword.get(meta, :streamables, [])
	\|> Enum.each(fn {topics, items} ->
	Streamer.stream(topics, items)
	end)

	meta
	end

	defp add_streamables(meta, streamables) do
	existing = Keyword.get(meta, :streamables, [])

	meta
	\|> Keyword.put(:streamables, streamables ++ existing)
	end

	defp add_notifications(meta, notifications) do
	existing = Keyword.get(meta, :notifications, [])

	meta
	\|> Keyword.put(:notifications, notifications ++ existing)
	end

	@impl true
	def handle_after_transaction(meta) do
	meta
	\|> send_notifications()
	\|> send_streamables()
	end
	end
	diff --git a/lib/pleroma/web/activity_pub/transmogrifier.ex b/lib/pleroma/web/activity_pub/transmogrifier.ex
	index 51c0cc860..142af1a13 100644
	--- a/lib/pleroma/web/activity_pub/transmogrifier.ex
	+++ b/lib/pleroma/web/activity_pub/transmogrifier.ex
	@@ -1,1024 +1,964 @@
	# Pleroma: A lightweight social networking server
	# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
	# SPDX-License-Identifier: AGPL-3.0-only

	defmodule Pleroma.Web.ActivityPub.Transmogrifier do
	@moduledoc """
	A module to handle coding from internal to wire ActivityPub and back.
	"""
	alias Pleroma.Activity
	alias Pleroma.EctoType.ActivityPub.ObjectValidators
	alias Pleroma.Maps
	alias Pleroma.Object
	alias Pleroma.Object.Containment
	alias Pleroma.Repo
	alias Pleroma.User
	alias Pleroma.Web.ActivityPub.ActivityPub
	alias Pleroma.Web.ActivityPub.Builder
	alias Pleroma.Web.ActivityPub.ObjectValidator
	alias Pleroma.Web.ActivityPub.Pipeline
	alias Pleroma.Web.ActivityPub.Utils
	alias Pleroma.Web.ActivityPub.Visibility
	alias Pleroma.Web.Federator
	alias Pleroma.Workers.TransmogrifierWorker

	import Ecto.Query

	require Logger
	require Pleroma.Constants

	@doc """
	Modifies an incoming AP object (mastodon format) to our internal format.
	"""
	def fix_object(object, options \\ []) do
	object
	\|> strip_internal_fields()
	\|> fix_actor()
	\|> fix_url()
	\|> fix_attachments()
	\|> fix_context()
	\|> fix_in_reply_to(options)
	\|> fix_emoji()
	\|> fix_tag()
	\|> fix_content_map()
	\|> fix_addressing()
	\|> fix_summary()
	end

	def fix_summary(%{"summary" => nil} = object) do
	Map.put(object, "summary", "")
	end

	def fix_summary(%{"summary" => _} = object) do
	# summary is present, nothing to do
	object
	end

	def fix_summary(object), do: Map.put(object, "summary", "")

	def fix_addressing_list(map, field) do
	addrs = map[field]

	cond do
	is_list(addrs) ->
	Map.put(map, field, Enum.filter(addrs, &is_binary/1))

	is_binary(addrs) ->
	Map.put(map, field, [addrs])

	true ->
	Map.put(map, field, [])
	end
	end

	# if directMessage flag is set to true, leave the addressing alone
	def fix_explicit_addressing(%{"directMessage" => true} = object, _follower_collection),
	do: object

	def fix_explicit_addressing(%{"to" => to, "cc" => cc} = object, follower_collection) do
	explicit_mentions =
	Utils.determine_explicit_mentions(object) ++
	[Pleroma.Constants.as_public(), follower_collection]

	explicit_to = Enum.filter(to, fn x -> x in explicit_mentions end)
	explicit_cc = Enum.filter(to, fn x -> x not in explicit_mentions end)

	final_cc =
	(cc ++ explicit_cc)
	\|> Enum.filter(& &1)
	\|> Enum.reject(fn x -> String.ends_with?(x, "/followers") and x != follower_collection end)
	\|> Enum.uniq()

	object
	\|> Map.put("to", explicit_to)
	\|> Map.put("cc", final_cc)
	end

	# if as:Public is addressed, then make sure the followers collection is also addressed
	# so that the activities will be delivered to local users.
	def fix_implicit_addressing(%{"to" => to, "cc" => cc} = object, followers_collection) do
	recipients = to ++ cc

	if followers_collection not in recipients do
	cond do
	Pleroma.Constants.as_public() in cc ->
	to = to ++ [followers_collection]
	Map.put(object, "to", to)

	Pleroma.Constants.as_public() in to ->
	cc = cc ++ [followers_collection]
	Map.put(object, "cc", cc)

	true ->
	object
	end
	else
	object
	end
	end

	def fix_addressing(object) do
	{:ok, %User{follower_address: follower_collection}} =
	object
	\|> Containment.get_actor()
	\|> User.get_or_fetch_by_ap_id()

	object
	\|> fix_addressing_list("to")
	\|> fix_addressing_list("cc")
	\|> fix_addressing_list("bto")
	\|> fix_addressing_list("bcc")
	\|> fix_explicit_addressing(follower_collection)
	\|> fix_implicit_addressing(follower_collection)
	end

	def fix_actor(%{"attributedTo" => actor} = object) do
	actor = Containment.get_actor(%{"actor" => actor})

	# TODO: Remove actor field for Objects
	object
	\|> Map.put("actor", actor)
	\|> Map.put("attributedTo", actor)
	end

	def fix_in_reply_to(object, options \\ [])

	def fix_in_reply_to(%{"inReplyTo" => in_reply_to} = object, options)
	when not is_nil(in_reply_to) do
	in_reply_to_id = prepare_in_reply_to(in_reply_to)
	depth = (options[:depth] \|\| 0) + 1

	if Federator.allowed_thread_distance?(depth) do
	with {:ok, replied_object} <- get_obj_helper(in_reply_to_id, options),
	%Activity{} <- Activity.get_create_by_object_ap_id(replied_object.data["id"]) do
	object
	\|> Map.put("inReplyTo", replied_object.data["id"])
	\|> Map.put("context", replied_object.data["context"] \|\| object["conversation"])
	\|> Map.drop(["conversation", "inReplyToAtomUri"])
	else
	e ->
	Logger.warn("Couldn't fetch #{inspect(in_reply_to_id)}, error: #{inspect(e)}")
	object
	end
	else
	object
	end
	end

	def fix_in_reply_to(object, _options), do: object

	defp prepare_in_reply_to(in_reply_to) do
	cond do
	is_bitstring(in_reply_to) ->
	in_reply_to

	is_map(in_reply_to) && is_bitstring(in_reply_to["id"]) ->
	in_reply_to["id"]

	is_list(in_reply_to) && is_bitstring(Enum.at(in_reply_to, 0)) ->
	Enum.at(in_reply_to, 0)

	true ->
	""
	end
	end

	def fix_context(object) do
	context = object["context"] \|\| object["conversation"] \|\| Utils.generate_context_id()

	object
	\|> Map.put("context", context)
	\|> Map.drop(["conversation"])
	end

	def fix_attachments(%{"attachment" => attachment} = object) when is_list(attachment) do
	attachments =
	Enum.map(attachment, fn data ->
	url =
	cond do
	is_list(data["url"]) -> List.first(data["url"])
	is_map(data["url"]) -> data["url"]
	true -> nil
	end

	media_type =
	cond do
	is_map(url) && MIME.extensions(url["mediaType"]) != [] ->
	url["mediaType"]

	is_bitstring(data["mediaType"]) && MIME.extensions(data["mediaType"]) != [] ->
	data["mediaType"]

	is_bitstring(data["mimeType"]) && MIME.extensions(data["mimeType"]) != [] ->
	data["mimeType"]

	true ->
	nil
	end

	href =
	cond do
	is_map(url) && is_binary(url["href"]) -> url["href"]
	is_binary(data["url"]) -> data["url"]
	is_binary(data["href"]) -> data["href"]
	true -> nil
	end

	if href do
	attachment_url =
	%{
	"href" => href,
	"type" => Map.get(url \|\| %{}, "type", "Link")
	}
	\|> Maps.put_if_present("mediaType", media_type)
	\|> Maps.put_if_present("width", (url \|\| %{})["width"] \|\| data["width"])
	\|> Maps.put_if_present("height", (url \|\| %{})["height"] \|\| data["height"])

	%{
	"url" => [attachment_url],
	"type" => data["type"] \|\| "Document"
	}
	\|> Maps.put_if_present("mediaType", media_type)
	\|> Maps.put_if_present("name", data["name"])
	\|> Maps.put_if_present("blurhash", data["blurhash"])
	else
	nil
	end
	end)
	\|> Enum.filter(& &1)

	Map.put(object, "attachment", attachments)
	end

	def fix_attachments(%{"attachment" => attachment} = object) when is_map(attachment) do
	object
	\|> Map.put("attachment", [attachment])
	\|> fix_attachments()
	end

	def fix_attachments(object), do: object

	def fix_url(%{"url" => url} = object) when is_map(url) do
	Map.put(object, "url", url["href"])
	end

	def fix_url(%{"url" => url} = object) when is_list(url) do
	first_element = Enum.at(url, 0)

	url_string =
	cond do
	is_bitstring(first_element) -> first_element
	is_map(first_element) -> first_element["href"] \|\| ""
	true -> ""
	end

	Map.put(object, "url", url_string)
	end

	def fix_url(object), do: object

	def fix_emoji(%{"tag" => tags} = object) when is_list(tags) do
	emoji =
	tags
	\|> Enum.filter(fn data -> is_map(data) and data["type"] == "Emoji" and data["icon"] end)
	\|> Enum.reduce(%{}, fn data, mapping ->
	name = String.trim(data["name"], ":")

	Map.put(mapping, name, data["icon"]["url"])
	end)

	Map.put(object, "emoji", emoji)
	end

	def fix_emoji(%{"tag" => %{"type" => "Emoji"} = tag} = object) do
	name = String.trim(tag["name"], ":")
	emoji = %{name => tag["icon"]["url"]}

	Map.put(object, "emoji", emoji)
	end

	def fix_emoji(object), do: object

	def fix_tag(%{"tag" => tag} = object) when is_list(tag) do
	tags =
	tag
	\|> Enum.filter(fn data -> data["type"] == "Hashtag" and data["name"] end)
	\|> Enum.map(fn
	%{"name" => "#" <> hashtag} -> String.downcase(hashtag)
	%{"name" => hashtag} -> String.downcase(hashtag)
	end)

	Map.put(object, "tag", tag ++ tags)
	end

	def fix_tag(%{"tag" => %{} = tag} = object) do
	object
	\|> Map.put("tag", [tag])
	\|> fix_tag
	end

	def fix_tag(object), do: object

	# content map usually only has one language so this will do for now.
	def fix_content_map(%{"contentMap" => content_map} = object) do
	content_groups = Map.to_list(content_map)
	{_, content} = Enum.at(content_groups, 0)

	Map.put(object, "content", content)
	end

	def fix_content_map(object), do: object

	defp fix_type(%{"type" => "Note", "inReplyTo" => reply_id, "name" => _} = object, options)
	when is_binary(reply_id) do
	options = Keyword.put(options, :fetch, true)

	with %Object{data: %{"type" => "Question"}} <- Object.normalize(reply_id, options) do
	Map.put(object, "type", "Answer")
	else
	_ -> object
	end
	end

	defp fix_type(object, _options), do: object

	# Reduce the object list to find the reported user.
	defp get_reported(objects) do
	Enum.reduce_while(objects, nil, fn ap_id, _ ->
	with %User{} = user <- User.get_cached_by_ap_id(ap_id) do
	{:halt, user}
	else
	_ -> {:cont, nil}
	end
	end)
	end

	- # Compatibility wrapper for Mastodon votes
	- defp handle_create(%{"object" => %{"type" => "Answer"}} = data, _user) do
	- handle_incoming(data)
	- end
	-
	- defp handle_create(%{"object" => object} = data, user) do
	- %{
	- to: data["to"],
	- object: object,
	- actor: user,
	- context: object["context"],
	- local: false,
	- published: data["published"],
	- additional:
	- Map.take(data, [
	- "cc",
	- "directMessage",
	- "id"
	- ])
	- }
	- \|> ActivityPub.create()
	- end
	-
	def handle_incoming(data, options \\ [])

	# Flag objects are placed ahead of the ID check because Mastodon 2.8 and earlier send them
	# with nil ID.
	def handle_incoming(%{"type" => "Flag", "object" => objects, "actor" => actor} = data, _options) do
	with context <- data["context"] \|\| Utils.generate_context_id(),
	content <- data["content"] \|\| "",
	%User{} = actor <- User.get_cached_by_ap_id(actor),
	# Reduce the object list to find the reported user.
	%User{} = account <- get_reported(objects),
	# Remove the reported user from the object list.
	statuses <- Enum.filter(objects, fn ap_id -> ap_id != account.ap_id end) do
	%{
	actor: actor,
	context: context,
	account: account,
	statuses: statuses,
	content: content,
	additional: %{"cc" => [account.ap_id]}
	}
	\|> ActivityPub.flag()
	end
	end

	# disallow objects with bogus IDs
	def handle_incoming(%{"id" => nil}, _options), do: :error
	def handle_incoming(%{"id" => ""}, _options), do: :error
	# length of https:// = 8, should validate better, but good enough for now.
	def handle_incoming(%{"id" => id}, _options) when is_binary(id) and byte_size(id) < 8,
	do: :error

	- # TODO: validate those with a Ecto scheme
	- # - tags
	- # - emoji
	- def handle_incoming(
	- %{"type" => "Create", "object" => %{"type" => "Page"} = object} = data,
	- options
	- ) do
	- actor = Containment.get_actor(data)
	-
	- with nil <- Activity.get_create_by_object_ap_id(object["id"]),
	- {:ok, %User{} = user} <- User.get_or_fetch_by_ap_id(actor) do
	- data =
	- data
	- \|> Map.put("object", fix_object(object, options))
	- \|> Map.put("actor", actor)
	- \|> fix_addressing()
	-
	- with {:ok, created_activity} <- handle_create(data, user) do
	- reply_depth = (options[:depth] \|\| 0) + 1
	-
	- if Federator.allowed_thread_distance?(reply_depth) do
	- for reply_id <- replies(object) do
	- Pleroma.Workers.RemoteFetcherWorker.enqueue("fetch_remote", %{
	- "id" => reply_id,
	- "depth" => reply_depth
	- })
	- end
	- end
	-
	- {:ok, created_activity}
	- end
	- else
	- %Activity{} = activity -> {:ok, activity}
	- _e -> :error
	- end
	- end
	-
	def handle_incoming(
	%{"type" => "Listen", "object" => %{"type" => "Audio"} = object} = data,
	options
	) do
	actor = Containment.get_actor(data)

	data =
	Map.put(data, "actor", actor)
	\|> fix_addressing

	with {:ok, %User{} = user} <- User.get_or_fetch_by_ap_id(data["actor"]) do
	reply_depth = (options[:depth] \|\| 0) + 1
	options = Keyword.put(options, :depth, reply_depth)
	object = fix_object(object, options)

	params = %{
	to: data["to"],
	object: object,
	actor: user,
	context: nil,
	local: false,
	published: data["published"],
	additional: Map.take(data, ["cc", "id"])
	}

	ActivityPub.listen(params)
	else
	_e -> :error
	end
	end

	@misskey_reactions %{
	"like" => "👍",
	"love" => "❤️",
	"laugh" => "😆",
	"hmm" => "🤔",
	"surprise" => "😮",
	"congrats" => "🎉",
	"angry" => "💢",
	"confused" => "😥",
	"rip" => "😇",
	"pudding" => "🍮",
	"star" => "⭐"
	}

	@doc "Rewrite misskey likes into EmojiReacts"
	def handle_incoming(
	%{
	"type" => "Like",
	"_misskey_reaction" => reaction
	} = data,
	options
	) do
	data
	\|> Map.put("type", "EmojiReact")
	\|> Map.put("content", @misskey_reactions[reaction] \|\| reaction)
	\|> handle_incoming(options)
	end

	def handle_incoming(
	%{"type" => "Create", "object" => %{"type" => objtype, "id" => obj_id}} = data,
	options
	)
	- when objtype in ~w{Question Answer ChatMessage Audio Video Event Article Note} do
	+ when objtype in ~w{Question Answer ChatMessage Audio Video Event Article Note Page} do
	fetch_options = Keyword.put(options, :depth, (options[:depth] \|\| 0) + 1)

	object =
	data["object"]
	\|> strip_internal_fields()
	\|> fix_type(fetch_options)
	\|> fix_in_reply_to(fetch_options)

	data = Map.put(data, "object", object)
	options = Keyword.put(options, :local, false)

	with {:ok, %User{}} <- ObjectValidator.fetch_actor(data),
	nil <- Activity.get_create_by_object_ap_id(obj_id),
	{:ok, activity, _} <- Pipeline.common_pipeline(data, options) do
	{:ok, activity}
	else
	%Activity{} = activity -> {:ok, activity}
	e -> e
	end
	end

	def handle_incoming(%{"type" => type} = data, _options)
	when type in ~w{Like EmojiReact Announce Add Remove} do
	with :ok <- ObjectValidator.fetch_actor_and_object(data),
	{:ok, activity, _meta} <-
	Pipeline.common_pipeline(data, local: false) do
	{:ok, activity}
	else
	e -> {:error, e}
	end
	end

	def handle_incoming(
	%{"type" => type} = data,
	_options
	)
	when type in ~w{Update Block Follow Accept Reject} do
	with {:ok, %User{}} <- ObjectValidator.fetch_actor(data),
	{:ok, activity, _} <-
	Pipeline.common_pipeline(data, local: false) do
	{:ok, activity}
	end
	end

	def handle_incoming(
	%{"type" => "Delete"} = data,
	_options
	) do
	with {:ok, activity, _} <-
	Pipeline.common_pipeline(data, local: false) do
	{:ok, activity}
	else
	{:error, {:validate, _}} = e ->
	# Check if we have a create activity for this
	with {:ok, object_id} <- ObjectValidators.ObjectID.cast(data["object"]),
	%Activity{data: %{"actor" => actor}} <-
	Activity.create_by_object_ap_id(object_id) \|> Repo.one(),
	# We have one, insert a tombstone and retry
	{:ok, tombstone_data, _} <- Builder.tombstone(actor, object_id),
	{:ok, _tombstone} <- Object.create(tombstone_data) do
	handle_incoming(data)
	else
	_ -> e
	end
	end
	end

	def handle_incoming(
	%{
	"type" => "Undo",
	"object" => %{"type" => "Follow", "object" => followed},
	"actor" => follower,
	"id" => id
	} = _data,
	_options
	) do
	with %User{local: true} = followed <- User.get_cached_by_ap_id(followed),
	{:ok, %User{} = follower} <- User.get_or_fetch_by_ap_id(follower),
	{:ok, activity} <- ActivityPub.unfollow(follower, followed, id, false) do
	User.unfollow(follower, followed)
	{:ok, activity}
	else
	_e -> :error
	end
	end

	def handle_incoming(
	%{
	"type" => "Undo",
	"object" => %{"type" => type}
	} = data,
	_options
	)
	when type in ["Like", "EmojiReact", "Announce", "Block"] do
	with {:ok, activity, _} <- Pipeline.common_pipeline(data, local: false) do
	{:ok, activity}
	end
	end

	# For Undos that don't have the complete object attached, try to find it in our database.
	def handle_incoming(
	%{
	"type" => "Undo",
	"object" => object
	} = activity,
	options
	)
	when is_binary(object) do
	with %Activity{data: data} <- Activity.get_by_ap_id(object) do
	activity
	\|> Map.put("object", data)
	\|> handle_incoming(options)
	else
	_e -> :error
	end
	end

	def handle_incoming(
	%{
	"type" => "Move",
	"actor" => origin_actor,
	"object" => origin_actor,
	"target" => target_actor
	},
	_options
	) do
	with %User{} = origin_user <- User.get_cached_by_ap_id(origin_actor),
	{:ok, %User{} = target_user} <- User.get_or_fetch_by_ap_id(target_actor),
	true <- origin_actor in target_user.also_known_as do
	ActivityPub.move(origin_user, target_user, false)
	else
	_e -> :error
	end
	end

	def handle_incoming(_, _), do: :error

	@spec get_obj_helper(String.t(), Keyword.t()) :: {:ok, Object.t()} \| nil
	def get_obj_helper(id, options \\ []) do
	options = Keyword.put(options, :fetch, true)

	case Object.normalize(id, options) do
	%Object{} = object -> {:ok, object}
	_ -> nil
	end
	end

	@spec get_embedded_obj_helper(String.t() \| Object.t(), User.t()) :: {:ok, Object.t()} \| nil
	def get_embedded_obj_helper(%{"attributedTo" => attributed_to, "id" => object_id} = data, %User{
	ap_id: ap_id
	})
	when attributed_to == ap_id do
	with {:ok, activity} <-
	handle_incoming(%{
	"type" => "Create",
	"to" => data["to"],
	"cc" => data["cc"],
	"actor" => attributed_to,
	"object" => data
	}) do
	{:ok, Object.normalize(activity, fetch: false)}
	else
	_ -> get_obj_helper(object_id)
	end
	end

	def get_embedded_obj_helper(object_id, _) do
	get_obj_helper(object_id)
	end

	def set_reply_to_uri(%{"inReplyTo" => in_reply_to} = object) when is_binary(in_reply_to) do
	with false <- String.starts_with?(in_reply_to, "http"),
	{:ok, %{data: replied_to_object}} <- get_obj_helper(in_reply_to) do
	Map.put(object, "inReplyTo", replied_to_object["external_url"] \|\| in_reply_to)
	else
	_e -> object
	end
	end

	def set_reply_to_uri(obj), do: obj

	@doc """
	Serialized Mastodon-compatible `replies` collection containing _self-replies_.
	Based on Mastodon's ActivityPub::NoteSerializer#replies.
	"""
	def set_replies(obj_data) do
	replies_uris =
	with limit when limit > 0 <-
	Pleroma.Config.get([:activitypub, :note_replies_output_limit], 0),
	%Object{} = object <- Object.get_cached_by_ap_id(obj_data["id"]) do
	object
	\|> Object.self_replies()
	\|> select([o], fragment("?->>'id'", o.data))
	\|> limit(^limit)
	\|> Repo.all()
	else
	_ -> []
	end

	set_replies(obj_data, replies_uris)
	end

	defp set_replies(obj, []) do
	obj
	end

	defp set_replies(obj, replies_uris) do
	replies_collection = %{
	"type" => "Collection",
	"items" => replies_uris
	}

	Map.merge(obj, %{"replies" => replies_collection})
	end

	def replies(%{"replies" => %{"first" => %{"items" => items}}}) when not is_nil(items) do
	items
	end

	def replies(%{"replies" => %{"items" => items}}) when not is_nil(items) do
	items
	end

	def replies(_), do: []

	# Prepares the object of an outgoing create activity.
	def prepare_object(object) do
	object
	\|> add_hashtags
	\|> add_mention_tags
	\|> add_emoji_tags
	\|> add_attributed_to
	\|> prepare_attachments
	\|> set_conversation
	\|> set_reply_to_uri
	\|> set_replies
	\|> strip_internal_fields
	\|> strip_internal_tags
	\|> set_type
	end

	# @doc
	# """
	# internal -> Mastodon
	# """

	def prepare_outgoing(%{"type" => activity_type, "object" => object_id} = data)
	when activity_type in ["Create", "Listen"] do
	object =
	object_id
	\|> Object.normalize(fetch: false)
	\|> Map.get(:data)
	\|> prepare_object

	data =
	data
	\|> Map.put("object", object)
	\|> Map.merge(Utils.make_json_ld_header())
	\|> Map.delete("bcc")

	{:ok, data}
	end

	def prepare_outgoing(%{"type" => "Announce", "actor" => ap_id, "object" => object_id} = data) do
	object =
	object_id
	\|> Object.normalize(fetch: false)

	data =
	if Visibility.is_private?(object) && object.data["actor"] == ap_id do
	data \|> Map.put("object", object \|> Map.get(:data) \|> prepare_object)
	else
	data \|> maybe_fix_object_url
	end

	data =
	data
	\|> strip_internal_fields
	\|> Map.merge(Utils.make_json_ld_header())
	\|> Map.delete("bcc")

	{:ok, data}
	end

	# Mastodon Accept/Reject requires a non-normalized object containing the actor URIs,
	# because of course it does.
	def prepare_outgoing(%{"type" => "Accept"} = data) do
	with follow_activity <- Activity.normalize(data["object"]) do
	object = %{
	"actor" => follow_activity.actor,
	"object" => follow_activity.data["object"],
	"id" => follow_activity.data["id"],
	"type" => "Follow"
	}

	data =
	data
	\|> Map.put("object", object)
	\|> Map.merge(Utils.make_json_ld_header())

	{:ok, data}
	end
	end

	def prepare_outgoing(%{"type" => "Reject"} = data) do
	with follow_activity <- Activity.normalize(data["object"]) do
	object = %{
	"actor" => follow_activity.actor,
	"object" => follow_activity.data["object"],
	"id" => follow_activity.data["id"],
	"type" => "Follow"
	}

	data =
	data
	\|> Map.put("object", object)
	\|> Map.merge(Utils.make_json_ld_header())

	{:ok, data}
	end
	end

	def prepare_outgoing(%{"type" => _type} = data) do
	data =
	data
	\|> strip_internal_fields
	\|> maybe_fix_object_url
	\|> Map.merge(Utils.make_json_ld_header())

	{:ok, data}
	end

	def maybe_fix_object_url(%{"object" => object} = data) when is_binary(object) do
	with false <- String.starts_with?(object, "http"),
	{:fetch, {:ok, relative_object}} <- {:fetch, get_obj_helper(object)},
	%{data: %{"external_url" => external_url}} when not is_nil(external_url) <-
	relative_object do
	Map.put(data, "object", external_url)
	else
	{:fetch, e} ->
	Logger.error("Couldn't fetch #{object} #{inspect(e)}")
	data

	_ ->
	data
	end
	end

	def maybe_fix_object_url(data), do: data

	def add_hashtags(object) do
	tags =
	(object["tag"] \|\| [])
	\|> Enum.map(fn
	# Expand internal representation tags into AS2 tags.
	tag when is_binary(tag) ->
	%{
	"href" => Pleroma.Web.Endpoint.url() <> "/tags/#{tag}",
	"name" => "##{tag}",
	"type" => "Hashtag"
	}

	# Do not process tags which are already AS2 tag objects.
	tag when is_map(tag) ->
	tag
	end)

	Map.put(object, "tag", tags)
	end

	# TODO These should be added on our side on insertion, it doesn't make much
	# sense to regenerate these all the time
	def add_mention_tags(object) do
	to = object["to"] \|\| []
	cc = object["cc"] \|\| []
	mentioned = User.get_users_from_set(to ++ cc, local_only: false)

	mentions = Enum.map(mentioned, &build_mention_tag/1)

	tags = object["tag"] \|\| []
	Map.put(object, "tag", tags ++ mentions)
	end

	defp build_mention_tag(%{ap_id: ap_id, nickname: nickname} = _) do
	%{"type" => "Mention", "href" => ap_id, "name" => "@#{nickname}"}
	end

	def take_emoji_tags(%User{emoji: emoji}) do
	emoji
	\|> Map.to_list()
	\|> Enum.map(&build_emoji_tag/1)
	end

	# TODO: we should probably send mtime instead of unix epoch time for updated
	def add_emoji_tags(%{"emoji" => emoji} = object) do
	tags = object["tag"] \|\| []

	out = Enum.map(emoji, &build_emoji_tag/1)

	Map.put(object, "tag", tags ++ out)
	end

	def add_emoji_tags(object), do: object

	defp build_emoji_tag({name, url}) do
	%{
	"icon" => %{"url" => "#{URI.encode(url)}", "type" => "Image"},
	"name" => ":" <> name <> ":",
	"type" => "Emoji",
	"updated" => "1970-01-01T00:00:00Z",
	"id" => url
	}
	end

	def set_conversation(object) do
	Map.put(object, "conversation", object["context"])
	end

	def set_type(%{"type" => "Answer"} = object) do
	Map.put(object, "type", "Note")
	end

	def set_type(object), do: object

	def add_attributed_to(object) do
	attributed_to = object["attributedTo"] \|\| object["actor"]
	Map.put(object, "attributedTo", attributed_to)
	end

	# TODO: Revisit this
	def prepare_attachments(%{"type" => "ChatMessage"} = object), do: object

	def prepare_attachments(object) do
	attachments =
	object
	\|> Map.get("attachment", [])
	\|> Enum.map(fn data ->
	[%{"mediaType" => media_type, "href" => href} = url \| _] = data["url"]

	%{
	"url" => href,
	"mediaType" => media_type,
	"name" => data["name"],
	"type" => "Document"
	}
	\|> Maps.put_if_present("width", url["width"])
	\|> Maps.put_if_present("height", url["height"])
	\|> Maps.put_if_present("blurhash", data["blurhash"])
	end)

	Map.put(object, "attachment", attachments)
	end

	def strip_internal_fields(object) do
	Map.drop(object, Pleroma.Constants.object_internal_fields())
	end

	defp strip_internal_tags(%{"tag" => tags} = object) do
	tags = Enum.filter(tags, fn x -> is_map(x) end)

	Map.put(object, "tag", tags)
	end

	defp strip_internal_tags(object), do: object

	def perform(:user_upgrade, user) do
	# we pass a fake user so that the followers collection is stripped away
	old_follower_address = User.ap_followers(%User{nickname: user.nickname})

	from(
	a in Activity,
	where: ^old_follower_address in a.recipients,
	update: [
	set: [
	recipients:
	fragment(
	"array_replace(?,?,?)",
	a.recipients,
	^old_follower_address,
	^user.follower_address
	)
	]
	]
	)
	\|> Repo.update_all([])
	end

	def upgrade_user_from_ap_id(ap_id) do
	with %User{local: false} = user <- User.get_cached_by_ap_id(ap_id),
	{:ok, data} <- ActivityPub.fetch_and_prepare_user_from_ap_id(ap_id),
	{:ok, user} <- update_user(user, data) do
	{:ok, _pid} = Task.start(fn -> ActivityPub.pinned_fetch_task(user) end)
	TransmogrifierWorker.enqueue("user_upgrade", %{"user_id" => user.id})
	{:ok, user}
	else
	%User{} = user -> {:ok, user}
	e -> e
	end
	end

	defp update_user(user, data) do
	user
	\|> User.remote_user_changeset(data)
	\|> User.update_and_set_cache()
	end

	def maybe_fix_user_url(%{"url" => url} = data) when is_map(url) do
	Map.put(data, "url", url["href"])
	end

	def maybe_fix_user_url(data), do: data

	def maybe_fix_user_object(data), do: maybe_fix_user_url(data)
	end
	diff --git a/test/fixtures/tesla_mock/lemmy-page.json b/test/fixtures/tesla_mock/lemmy-page.json
	new file mode 100644
	index 000000000..f07097a0e
	--- /dev/null
	+++ b/test/fixtures/tesla_mock/lemmy-page.json
	@@ -0,0 +1,17 @@
	+{
	+ "commentsEnabled": true,
	+ "sensitive": false,
	+ "stickied": false,
	+ "attributedTo": "https://enterprise.lemmy.ml/u/nutomic",
	+ "summary": "Hello Federation!",
	+ "url": "https://enterprise.lemmy.ml/pictrs/image/US52d9DPvf.jpg",
	+ "image": {
	+ "type": "Image",
	+ "url": "https://enterprise.lemmy.ml/pictrs/image/lwFAcXHUjS.jpg"
	+ },
	+ "published": "2020-09-14T15:03:11.909105+00:00",
	+ "to": "https://enterprise.lemmy.ml/c/main",
	+ "@context": "https://www.w3.org/ns/activitystreams",
	+ "id": "https://enterprise.lemmy.ml/post/3",
	+ "type": "Page"
	+}
	diff --git a/test/fixtures/tesla_mock/lemmy-user.json b/test/fixtures/tesla_mock/lemmy-user.json
	new file mode 100644
	index 000000000..d0e9066ac
	--- /dev/null
	+++ b/test/fixtures/tesla_mock/lemmy-user.json
	@@ -0,0 +1,27 @@
	+{
	+ "publicKey": {
	+ "id": "https://enterprise.lemmy.ml/u/nutomic#main-key",
	+ "owner": "https://enterprise.lemmy.ml/u/nutomic",
	+ "publicKeyPem": "-----BEGIN PUBLIC KEY-----\nMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvfwAYPxp1gOk2HcCRoUd\nupoecvmnpzRc5Gu6/N3YQyOyRsrYuiYLNQq2cgM3kcU80ZeEetkwkYgXkRJOKu/b\nBWb7i1zt2tdr5k6lUdW8dfCyjht8ooFPQdov8J3QYHfgBHyUYxuCNfSujryxx2wu\nLQcdjRQa5NIWcomSO8OXmCF5/Yhg2XWCbtnlxEq6Y+AFddr1mAlTOy5pBr5d+xZz\njLw/U3CioNJ79yGi/sJhgp6IyJqtUSoN3b4BgRIEts2QVvn44W1rQy9wCbRYQrO1\nBcB9Wel4k3rJJK8uHg+LpHVMaZppkNaWGkMBhMbzr8qmIlcNWNi7cbMK/p5vyviy\nSwIDAQAB\n-----END PUBLIC KEY-----\n"
	+ },
	+ "inbox": "https://enterprise.lemmy.ml/u/nutomic/inbox",
	+ "preferredUsername": "Nutomic",
	+ "endpoints": {
	+ "sharedInbox": "https://enterprise.lemmy.ml/inbox"
	+ },
	+ "summary": "some bio",
	+ "icon": {
	+ "type": "Image",
	+ "url": "https://enterprise.lemmy.ml/pictrs/image/F6Z7QcWZRJ.jpg"
	+ },
	+ "image": {
	+ "type": "Image",
	+ "url": "https://enterprise.lemmy.ml:/pictrs/image/Q79N9oCDEG.png"
	+ },
	+ "published": "2020-09-14T14:54:53.080949+00:00",
	+ "updated": "2020-10-14T10:58:28.139178+00:00",
	+ "@context": "https://www.w3.org/ns/activitystreams",
	+ "id": "https://enterprise.lemmy.ml/u/nutomic",
	+ "type": "Person",
	+ "name": "nutomic"
	+}
	diff --git a/test/pleroma/web/activity_pub/object_validators/article_note_validator_test.exs b/test/pleroma/web/activity_pub/object_validators/article_note_page_validator_test.exs
	similarity index 76%
	rename from test/pleroma/web/activity_pub/object_validators/article_note_validator_test.exs
	rename to test/pleroma/web/activity_pub/object_validators/article_note_page_validator_test.exs
	index e408c85c3..720c17d8d 100644
	--- a/test/pleroma/web/activity_pub/object_validators/article_note_validator_test.exs
	+++ b/test/pleroma/web/activity_pub/object_validators/article_note_page_validator_test.exs
	@@ -1,35 +1,35 @@
	# Pleroma: A lightweight social networking server
	# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
	# SPDX-License-Identifier: AGPL-3.0-only

	-defmodule Pleroma.Web.ActivityPub.ObjectValidators.ArticleNoteValidatorTest do
	+defmodule Pleroma.Web.ActivityPub.ObjectValidators.ArticleNotePageValidatorTest do
	use Pleroma.DataCase, async: true

	- alias Pleroma.Web.ActivityPub.ObjectValidators.ArticleNoteValidator
	+ alias Pleroma.Web.ActivityPub.ObjectValidators.ArticleNotePageValidator
	alias Pleroma.Web.ActivityPub.Utils

	import Pleroma.Factory

	describe "Notes" do
	setup do
	user = insert(:user)

	note = %{
	"id" => Utils.generate_activity_id(),
	"type" => "Note",
	"actor" => user.ap_id,
	"to" => [user.follower_address],
	"cc" => [],
	"content" => "Hellow this is content.",
	"context" => "xxx",
	"summary" => "a post"
	}

	%{user: user, note: note}
	end

	test "a basic note validates", %{note: note} do
	- %{valid?: true} = ArticleNoteValidator.cast_and_validate(note)
	+ %{valid?: true} = ArticleNotePageValidator.cast_and_validate(note)
	end
	end
	end
	diff --git a/test/pleroma/web/activity_pub/transmogrifier/page_handling_test.exs b/test/pleroma/web/activity_pub/transmogrifier/page_handling_test.exs
	new file mode 100644
	index 000000000..4ac71e066
	--- /dev/null
	+++ b/test/pleroma/web/activity_pub/transmogrifier/page_handling_test.exs
	@@ -0,0 +1,36 @@
	+# 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.PageHandlingTest do
	+ use Oban.Testing, repo: Pleroma.Repo
	+ use Pleroma.DataCase
	+
	+ alias Pleroma.Object.Fetcher
	+
	+ test "Lemmy Page" do
	+ Tesla.Mock.mock(fn
	+ %{url: "https://enterprise.lemmy.ml/post/3"} ->
	+ %Tesla.Env{
	+ status: 200,
	+ headers: [{"content-type", "application/activity+json"}],
	+ body: File.read!("test/fixtures/tesla_mock/lemmy-page.json")
	+ }
	+
	+ %{url: "https://enterprise.lemmy.ml/u/nutomic"} ->
	+ %Tesla.Env{
	+ status: 200,
	+ headers: [{"content-type", "application/activity+json"}],
	+ body: File.read!("test/fixtures/tesla_mock/lemmy-user.json")
	+ }
	+ end)
	+
	+ {:ok, object} = Fetcher.fetch_object_from_id("https://enterprise.lemmy.ml/post/3")
	+
	+ assert object.data["summary"] == "Hello Federation!"
	+ assert object.data["published"] == "2020-09-14T15:03:11.909105Z"
	+
	+ # WAT
	+ assert object.data["url"] == "https://enterprise.lemmy.ml/pictrs/image/US52d9DPvf.jpg"
	+ end
	+end

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