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	diff --git a/lib/pleroma/notification.ex b/lib/pleroma/notification.ex
	index b952e81fa..8868a910e 100644
	--- a/lib/pleroma/notification.ex
	+++ b/lib/pleroma/notification.ex
	@@ -1,663 +1,663 @@
	# Pleroma: A lightweight social networking server
	# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
	# SPDX-License-Identifier: AGPL-3.0-only

	defmodule Pleroma.Notification do
	use Ecto.Schema

	alias Ecto.Multi
	alias Pleroma.Activity
	alias Pleroma.FollowingRelationship
	alias Pleroma.Marker
	alias Pleroma.Notification
	alias Pleroma.Object
	alias Pleroma.Pagination
	alias Pleroma.Repo
	alias Pleroma.ThreadMute
	alias Pleroma.User
	alias Pleroma.Web.CommonAPI
	alias Pleroma.Web.CommonAPI.Utils
	alias Pleroma.Web.Push
	alias Pleroma.Web.Streamer

	import Ecto.Query
	import Ecto.Changeset

	require Logger

	@type t :: %__MODULE__{}

	@include_muted_option :with_muted

	schema "notifications" do
	field(:seen, :boolean, default: false)
	# This is an enum type in the database. If you add a new notification type,
	# remember to add a migration to add it to the `notifications_type` enum
	# as well.
	field(:type, :string)
	belongs_to(:user, User, type: FlakeId.Ecto.CompatType)
	belongs_to(:activity, Activity, type: FlakeId.Ecto.CompatType)

	timestamps()
	end

	def update_notification_type(user, activity) do
	with %__MODULE__{} = notification <-
	Repo.get_by(__MODULE__, user_id: user.id, activity_id: activity.id) do
	type =
	activity
	\|> type_from_activity()

	notification
	\|> changeset(%{type: type})
	\|> Repo.update()
	end
	end

	@spec unread_notifications_count(User.t()) :: integer()
	def unread_notifications_count(%User{id: user_id}) do
	from(q in __MODULE__,
	where: q.user_id == ^user_id and q.seen == false
	)
	\|> Repo.aggregate(:count, :id)
	end

	@notification_types ~w{
	favourite
	follow
	follow_request
	mention
	move
	pleroma:chat_mention
	pleroma:emoji_reaction
	reblog
	}

	def changeset(%Notification{} = notification, attrs) do
	notification
	\|> cast(attrs, [:seen, :type])
	\|> validate_inclusion(:type, @notification_types)
	end

	@spec last_read_query(User.t()) :: Ecto.Queryable.t()
	def last_read_query(user) do
	from(q in Pleroma.Notification,
	where: q.user_id == ^user.id,
	where: q.seen == true,
	select: type(q.id, :string),
	limit: 1,
	order_by: [desc: :id]
	)
	end

	defp for_user_query_ap_id_opts(user, opts) do
	ap_id_relationships =
	[:block] ++
	if opts[@include_muted_option], do: [], else: [:notification_mute]

	preloaded_ap_ids = User.outgoing_relationships_ap_ids(user, ap_id_relationships)

	exclude_blocked_opts = Map.merge(%{blocked_users_ap_ids: preloaded_ap_ids[:block]}, opts)

	exclude_notification_muted_opts =
	Map.merge(%{notification_muted_users_ap_ids: preloaded_ap_ids[:notification_mute]}, opts)

	{exclude_blocked_opts, exclude_notification_muted_opts}
	end

	def for_user_query(user, opts \\ %{}) do
	{exclude_blocked_opts, exclude_notification_muted_opts} =
	for_user_query_ap_id_opts(user, opts)

	Notification
	\|> where(user_id: ^user.id)
	\|> where(
	[n, a],
	fragment(
	"? not in (SELECT ap_id FROM users WHERE deactivated = 'true')",
	a.actor
	)
	)
	\|> join(:inner, [n], activity in assoc(n, :activity))
	\|> join(:left, [n, a], object in Object,
	on:
	fragment(
	"(?->>'id') = COALESCE(?->'object'->>'id', ?->>'object')",
	object.data,
	a.data,
	a.data
	)
	)
	\|> preload([n, a, o], activity: {a, object: o})
	\|> exclude_notification_muted(user, exclude_notification_muted_opts)
	\|> exclude_blocked(user, exclude_blocked_opts)
	\|> exclude_filtered(user)
	\|> exclude_visibility(opts)
	end

	# Excludes blocked users and non-followed domain-blocked users
	defp exclude_blocked(query, user, opts) do
	blocked_ap_ids = opts[:blocked_users_ap_ids] \|\| User.blocked_users_ap_ids(user)

	query
	\|> where([n, a], a.actor not in ^blocked_ap_ids)
	\|> FollowingRelationship.keep_following_or_not_domain_blocked(user)
	end

	defp exclude_notification_muted(query, _, %{@include_muted_option => true}) do
	query
	end

	defp exclude_notification_muted(query, user, opts) do
	notification_muted_ap_ids =
	opts[:notification_muted_users_ap_ids] \|\| User.notification_muted_users_ap_ids(user)

	query
	\|> where([n, a], a.actor not in ^notification_muted_ap_ids)
	\|> join(:left, [n, a], tm in ThreadMute,
	on: tm.user_id == ^user.id and tm.context == fragment("?->>'context'", a.data)
	)
	\|> where([n, a, o, tm], is_nil(tm.user_id))
	end

	defp exclude_filtered(query, user) do
	case Pleroma.Filter.compose_regex(user) do
	nil ->
	query

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

	@valid_visibilities ~w[direct unlisted public private]

	defp exclude_visibility(query, %{exclude_visibilities: visibility})
	when is_list(visibility) do
	if Enum.all?(visibility, &(&1 in @valid_visibilities)) do
	query
	\|> join(:left, [n, a], mutated_activity in Pleroma.Activity,
	on:
	fragment(
	"COALESCE((?->'object')->>'id', ?->>'object')",
	a.data,
	a.data
	) ==
	fragment(
	"COALESCE((?->'object')->>'id', ?->>'object')",
	mutated_activity.data,
	mutated_activity.data
	) and
	fragment("(?->>'type' = 'Like' or ?->>'type' = 'Announce')", a.data, a.data) and
	fragment("?->>'type'", mutated_activity.data) == "Create",
	as: :mutated_activity
	)
	\|> where(
	[n, a, mutated_activity: mutated_activity],
	not fragment(
	"""
	CASE WHEN (?->>'type') = 'Like' or (?->>'type') = 'Announce'
	THEN (activity_visibility(?, ?, ?) = ANY (?))
	ELSE (activity_visibility(?, ?, ?) = ANY (?)) END
	""",
	a.data,
	a.data,
	mutated_activity.actor,
	mutated_activity.recipients,
	mutated_activity.data,
	^visibility,
	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
	exclude_visibility(query, [visibility])
	end

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

	defp exclude_visibility(query, _visibility), do: query

	def for_user(user, opts \\ %{}) do
	user
	\|> for_user_query(opts)
	\|> Pagination.fetch_paginated(opts)
	end

	@doc """
	Returns notifications for user received since given date.

	## Examples

	iex> Pleroma.Notification.for_user_since(%Pleroma.User{}, ~N[2019-04-13 11:22:33])
	[%Pleroma.Notification{}, %Pleroma.Notification{}]

	iex> Pleroma.Notification.for_user_since(%Pleroma.User{}, ~N[2019-04-15 11:22:33])
	[]
	"""
	@spec for_user_since(Pleroma.User.t(), NaiveDateTime.t()) :: [t()]
	def for_user_since(user, date) do
	from(n in for_user_query(user),
	where: n.updated_at > ^date
	)
	\|> Repo.all()
	end

	def set_read_up_to(%{id: user_id} = user, id) do
	query =
	from(
	n in Notification,
	where: n.user_id == ^user_id,
	where: n.id <= ^id,
	where: n.seen == false,
	# Ideally we would preload object and activities here
	# but Ecto does not support preloads in update_all
	select: n.id
	)

	{:ok, %{ids: {_, notification_ids}}} =
	Multi.new()
	\|> Multi.update_all(:ids, query, set: [seen: true, updated_at: NaiveDateTime.utc_now()])
	\|> Marker.multi_set_last_read_id(user, "notifications")
	\|> Repo.transaction()

	for_user_query(user)
	\|> where([n], n.id in ^notification_ids)
	\|> Repo.all()
	end

	@spec read_one(User.t(), String.t()) ::
	{:ok, Notification.t()} \| {:error, Ecto.Changeset.t()} \| nil
	def read_one(%User{} = user, notification_id) do
	with {:ok, %Notification{} = notification} <- get(user, notification_id) do
	Multi.new()
	\|> Multi.update(:update, changeset(notification, %{seen: true}))
	\|> Marker.multi_set_last_read_id(user, "notifications")
	\|> Repo.transaction()
	\|> case do
	{:ok, %{update: notification}} -> {:ok, notification}
	{:error, :update, changeset, _} -> {:error, changeset}
	end
	end
	end

	def get(%{id: user_id} = _user, id) do
	query =
	from(
	n in Notification,
	where: n.id == ^id,
	join: activity in assoc(n, :activity),
	preload: [activity: activity]
	)

	notification = Repo.one(query)

	case notification do
	%{user_id: ^user_id} ->
	{:ok, notification}

	_ ->
	{:error, "Cannot get notification"}
	end
	end

	def clear(user) do
	from(n in Notification, where: n.user_id == ^user.id)
	\|> Repo.delete_all()
	end

	def destroy_multiple(%{id: user_id} = _user, ids) do
	from(n in Notification,
	where: n.id in ^ids,
	where: n.user_id == ^user_id
	)
	\|> Repo.delete_all()
	end

	def dismiss(%Pleroma.Activity{} = activity) do
	Notification
	\|> where([n], n.activity_id == ^activity.id)
	\|> Repo.delete_all()
	\|> case do
	{_, notifications} -> {:ok, notifications}
	_ -> {:error, "Cannot dismiss notification"}
	end
	end

	def dismiss(%{id: user_id} = _user, id) do
	notification = Repo.get(Notification, id)

	case notification do
	%{user_id: ^user_id} ->
	Repo.delete(notification)

	_ ->
	{:error, "Cannot dismiss notification"}
	end
	end

	@spec create_notifications(Activity.t(), keyword()) :: {:ok, [Notification.t()] \| []}
	def create_notifications(activity, options \\ [])

	def create_notifications(%Activity{data: %{"to" => _, "type" => "Create"}} = activity, options) do
	object = Object.normalize(activity, false)

	if object && object.data["type"] == "Answer" do
	{:ok, []}
	else
	do_create_notifications(activity, options)
	end
	end

	def create_notifications(%Activity{data: %{"type" => type}} = activity, options)
	when type in ["Follow", "Like", "Announce", "Move", "EmojiReact"] do
	do_create_notifications(activity, options)
	end

	def create_notifications(_, _), do: {:ok, []}

	defp do_create_notifications(%Activity{} = activity, options) do
	do_send = Keyword.get(options, :do_send, true)

	{enabled_receivers, disabled_receivers} = get_notified_from_activity(activity)
	potential_receivers = enabled_receivers ++ disabled_receivers

	notifications =
	Enum.map(potential_receivers, fn user ->
	do_send = do_send && user in enabled_receivers
	create_notification(activity, user, do_send)
	end)
	\|> Enum.reject(&is_nil/1)

	{:ok, notifications}
	end

	defp type_from_activity(%{data: %{"type" => type}} = activity) do
	case type do
	"Follow" ->
	if Activity.follow_accepted?(activity) do
	"follow"
	else
	"follow_request"
	end

	"Announce" ->
	"reblog"

	"Like" ->
	"favourite"

	"Move" ->
	"move"

	"EmojiReact" ->
	"pleroma:emoji_reaction"

	# Compatibility with old reactions
	"EmojiReaction" ->
	"pleroma:emoji_reaction"

	"Create" ->
	activity
	\|> type_from_activity_object()

	t ->
	raise "No notification type for activity type #{t}"
	end
	end

	defp type_from_activity_object(%{data: %{"type" => "Create", "object" => %{}}}), do: "mention"

	defp type_from_activity_object(%{data: %{"type" => "Create"}} = activity) do
	object = Object.get_by_ap_id(activity.data["object"])

	case object && object.data["type"] do
	"ChatMessage" -> "pleroma:chat_mention"
	_ -> "mention"
	end
	end

	# TODO move to sql, too.
	def create_notification(%Activity{} = activity, %User{} = user, do_send \\ true) do
	unless skip?(activity, user) do
	{:ok, %{notification: notification}} =
	Multi.new()
	\|> Multi.insert(:notification, %Notification{
	user_id: user.id,
	activity: activity,
	seen: mark_as_read?(activity, user),
	type: type_from_activity(activity)
	})
	\|> Marker.multi_set_last_read_id(user, "notifications")
	\|> Repo.transaction()

	if do_send do
	Streamer.stream(["user", "user:notification"], notification)
	Push.send(notification)
	end

	notification
	end
	end

	@doc """
	Returns a tuple with 2 elements:
	{notification-enabled receivers, currently disabled receivers (blocking / [thread] muting)}

	NOTE: might be called for FAKE Activities, see ActivityPub.Utils.get_notified_from_object/1
	"""
	@spec get_notified_from_activity(Activity.t(), boolean()) :: {list(User.t()), list(User.t())}
	def get_notified_from_activity(activity, local_only \\ true)

	def get_notified_from_activity(%Activity{data: %{"type" => type}} = activity, local_only)
	when type in ["Create", "Like", "Announce", "Follow", "Move", "EmojiReact"] do
	potential_receiver_ap_ids = get_potential_receiver_ap_ids(activity)

	potential_receivers =
	User.get_users_from_set(potential_receiver_ap_ids, local_only: local_only)

	notification_enabled_ap_ids =
	potential_receiver_ap_ids
	\|> exclude_domain_blocker_ap_ids(activity, potential_receivers)
	\|> exclude_relationship_restricted_ap_ids(activity)
	\|> exclude_thread_muter_ap_ids(activity)

	notification_enabled_users =
	Enum.filter(potential_receivers, fn u -> u.ap_id in notification_enabled_ap_ids end)

	{notification_enabled_users, potential_receivers -- notification_enabled_users}
	end

	def get_notified_from_activity(_, _local_only), do: {[], []}

	# For some activities, only notify the author of the object
	def get_potential_receiver_ap_ids(%{data: %{"type" => type, "object" => object_id}})
	when type in ~w{Like Announce EmojiReact} do
	case Object.get_cached_by_ap_id(object_id) do
	%Object{data: %{"actor" => actor}} ->
	[actor]

	_ ->
	[]
	end
	end

	def get_potential_receiver_ap_ids(%{data: %{"type" => "Follow", "object" => object_id}}) do
	[object_id]
	end

	def get_potential_receiver_ap_ids(activity) do
	[]
	\|> Utils.maybe_notify_to_recipients(activity)
	\|> Utils.maybe_notify_mentioned_recipients(activity)
	\|> Utils.maybe_notify_subscribers(activity)
	\|> Utils.maybe_notify_followers(activity)
	\|> Enum.uniq()
	end

	@doc "Filters out AP IDs domain-blocking and not following the activity's actor"
	def exclude_domain_blocker_ap_ids(ap_ids, activity, preloaded_users \\ [])

	def exclude_domain_blocker_ap_ids([], _activity, _preloaded_users), do: []

	def exclude_domain_blocker_ap_ids(ap_ids, %Activity{} = activity, preloaded_users) do
	activity_actor_domain = activity.actor && URI.parse(activity.actor).host

	users =
	ap_ids
	\|> Enum.map(fn ap_id ->
	Enum.find(preloaded_users, &(&1.ap_id == ap_id)) \|\|
	User.get_cached_by_ap_id(ap_id)
	end)
	\|> Enum.filter(& &1)

	domain_blocker_ap_ids = for u <- users, activity_actor_domain in u.domain_blocks, do: u.ap_id

	domain_blocker_follower_ap_ids =
	if Enum.any?(domain_blocker_ap_ids) do
	activity
	\|> Activity.user_actor()
	\|> FollowingRelationship.followers_ap_ids(domain_blocker_ap_ids)
	else
	[]
	end

	ap_ids
	\|> Kernel.--(domain_blocker_ap_ids)
	\|> Kernel.++(domain_blocker_follower_ap_ids)
	end

	@doc "Filters out AP IDs of users basing on their relationships with activity actor user"
	def exclude_relationship_restricted_ap_ids([], _activity), do: []

	def exclude_relationship_restricted_ap_ids(ap_ids, %Activity{} = activity) do
	relationship_restricted_ap_ids =
	activity
	\|> Activity.user_actor()
	\|> User.incoming_relationships_ungrouped_ap_ids([
	:block,
	:notification_mute
	])

	Enum.uniq(ap_ids) -- relationship_restricted_ap_ids
	end

	@doc "Filters out AP IDs of users who mute activity thread"
	def exclude_thread_muter_ap_ids([], _activity), do: []

	def exclude_thread_muter_ap_ids(ap_ids, %Activity{} = activity) do
	thread_muter_ap_ids = ThreadMute.muter_ap_ids(activity.data["context"])

	Enum.uniq(ap_ids) -- thread_muter_ap_ids
	end

	@spec skip?(Activity.t(), User.t()) :: boolean()
	def skip?(%Activity{} = activity, %User{} = user) do
	[
	:self,
	:invisible,
	:block_from_strangers,
	:recently_followed,
	:filtered
	]
	\|> Enum.find(&skip?(&1, activity, user))
	end

	def skip?(_, _), do: false

	@spec skip?(atom(), Activity.t(), User.t()) :: boolean()
	def skip?(:self, %Activity{} = activity, %User{} = user) do
	activity.data["actor"] == user.ap_id
	end

	def skip?(:invisible, %Activity{} = activity, _) do
	actor = activity.data["actor"]
	user = User.get_cached_by_ap_id(actor)
	User.invisible?(user)
	end

	def skip?(
	:block_from_strangers,
	%Activity{} = activity,
	%User{notification_settings: %{block_from_strangers: true}} = user
	) do
	actor = activity.data["actor"]
	follower = User.get_cached_by_ap_id(actor)
	!User.following?(follower, user)
	end

	# To do: consider defining recency in hours and checking FollowingRelationship with a single SQL
	def skip?(:recently_followed, %Activity{data: %{"type" => "Follow"}} = activity, %User{} = user) do
	actor = activity.data["actor"]

	Notification.for_user(user)
	\|> Enum.any?(fn
	%{activity: %{data: %{"type" => "Follow", "actor" => ^actor}}} -> true
	_ -> false
	end)
	end

	def skip?(:filtered, %{data: %{"type" => type}}, _) when type in ["Follow", "Move"], do: false

	def skip?(:filtered, activity, user) do
	object = Object.normalize(activity)

	cond do
	is_nil(object) ->
	false

	object.data["actor"] == user.ap_id ->
	false

	not is_nil(regex = Pleroma.Filter.compose_regex(user, :re)) ->
	Regex.match?(regex, object.data["content"])

	true ->
	false
	end
	end

	def skip?(_, _, _), do: false

	def mark_as_read?(activity, target_user) do
	user = Activity.user_actor(activity)
	User.mutes_user?(target_user, user) \|\| CommonAPI.thread_muted?(target_user, activity)
	end

	def for_user_and_activity(user, activity) do
	from(n in __MODULE__,
	where: n.user_id == ^user.id,
	where: n.activity_id == ^activity.id
	)
	\|> Repo.one()
	end

	- @spec mark_as_read(User.t(), Activity.t()) :: {integer(), nil \| [term()]}
	- def mark_as_read(%User{id: id}, %Activity{data: %{"context" => context}}) do
	+ @spec mark_context_as_read(User.t(), String.t()) :: {integer(), nil \| [term()]}
	+ def mark_context_as_read(%User{id: id}, context) do
	from(
	n in Notification,
	join: a in assoc(n, :activity),
	where: n.user_id == ^id,
	where: n.seen == false,
	where: fragment("?->>'context'", a.data) == ^context
	)
	\|> Repo.update_all(set: [seen: true])
	end
	end
	diff --git a/lib/pleroma/web/common_api/common_api.ex b/lib/pleroma/web/common_api/common_api.ex
	index 43e9e39a8..4ab533658 100644
	--- a/lib/pleroma/web/common_api/common_api.ex
	+++ b/lib/pleroma/web/common_api/common_api.ex
	@@ -1,554 +1,554 @@
	# Pleroma: A lightweight social networking server
	# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
	# SPDX-License-Identifier: AGPL-3.0-only

	defmodule Pleroma.Web.CommonAPI do
	alias Pleroma.Activity
	alias Pleroma.ActivityExpiration
	alias Pleroma.Conversation.Participation
	alias Pleroma.Formatter
	alias Pleroma.Object
	alias Pleroma.ThreadMute
	alias Pleroma.User
	alias Pleroma.UserRelationship
	alias Pleroma.Web.ActivityPub.ActivityPub
	alias Pleroma.Web.ActivityPub.Builder
	alias Pleroma.Web.ActivityPub.Pipeline
	alias Pleroma.Web.ActivityPub.Utils
	alias Pleroma.Web.ActivityPub.Visibility

	import Pleroma.Web.Gettext
	import Pleroma.Web.CommonAPI.Utils

	require Pleroma.Constants
	require Logger

	def block(blocker, blocked) do
	with {:ok, block_data, _} <- Builder.block(blocker, blocked),
	{:ok, block, _} <- Pipeline.common_pipeline(block_data, local: true) do
	{:ok, block}
	end
	end

	def post_chat_message(%User{} = user, %User{} = recipient, content, opts \\ []) do
	with maybe_attachment <- opts[:media_id] && Object.get_by_id(opts[:media_id]),
	:ok <- validate_chat_content_length(content, !!maybe_attachment),
	{_, {:ok, chat_message_data, _meta}} <-
	{:build_object,
	Builder.chat_message(
	user,
	recipient.ap_id,
	content \|> format_chat_content,
	attachment: maybe_attachment
	)},
	{_, {:ok, create_activity_data, _meta}} <-
	{:build_create_activity, Builder.create(user, chat_message_data, [recipient.ap_id])},
	{_, {:ok, %Activity{} = activity, _meta}} <-
	{:common_pipeline,
	Pipeline.common_pipeline(create_activity_data,
	local: true
	)} do
	{:ok, activity}
	end
	end

	defp format_chat_content(nil), do: nil

	defp format_chat_content(content) do
	{text, _, _} =
	content
	\|> Formatter.html_escape("text/plain")
	\|> Formatter.linkify()
	\|> (fn {text, mentions, tags} ->
	{String.replace(text, ~r/\r?\n/, "<br>"), mentions, tags}
	end).()

	text
	end

	defp validate_chat_content_length(_, true), do: :ok
	defp validate_chat_content_length(nil, false), do: {:error, :no_content}

	defp validate_chat_content_length(content, _) do
	if String.length(content) <= Pleroma.Config.get([:instance, :chat_limit]) do
	:ok
	else
	{:error, :content_too_long}
	end
	end

	def unblock(blocker, blocked) do
	with {_, %Activity{} = block} <- {:fetch_block, Utils.fetch_latest_block(blocker, blocked)},
	{:ok, unblock_data, _} <- Builder.undo(blocker, block),
	{:ok, unblock, _} <- Pipeline.common_pipeline(unblock_data, local: true) do
	{:ok, unblock}
	else
	{:fetch_block, nil} ->
	if User.blocks?(blocker, blocked) do
	User.unblock(blocker, blocked)
	{:ok, :no_activity}
	else
	{:error, :not_blocking}
	end

	e ->
	e
	end
	end

	def follow(follower, followed) do
	timeout = Pleroma.Config.get([:activitypub, :follow_handshake_timeout])

	with {:ok, follow_data, _} <- Builder.follow(follower, followed),
	{:ok, activity, _} <- Pipeline.common_pipeline(follow_data, local: true),
	{:ok, follower, followed} <- User.wait_and_refresh(timeout, follower, followed) do
	if activity.data["state"] == "reject" do
	{:error, :rejected}
	else
	{:ok, follower, followed, activity}
	end
	end
	end

	def unfollow(follower, unfollowed) do
	with {:ok, follower, _follow_activity} <- User.unfollow(follower, unfollowed),
	{:ok, _activity} <- ActivityPub.unfollow(follower, unfollowed),
	{:ok, _subscription} <- User.unsubscribe(follower, unfollowed) do
	{:ok, follower}
	end
	end

	def accept_follow_request(follower, followed) do
	with %Activity{} = follow_activity <- Utils.fetch_latest_follow(follower, followed),
	{:ok, accept_data, _} <- Builder.accept(followed, follow_activity),
	{:ok, _activity, _} <- Pipeline.common_pipeline(accept_data, local: true) do
	{:ok, follower}
	end
	end

	def reject_follow_request(follower, followed) do
	with %Activity{} = follow_activity <- Utils.fetch_latest_follow(follower, followed),
	{:ok, reject_data, _} <- Builder.reject(followed, follow_activity),
	{:ok, _activity, _} <- Pipeline.common_pipeline(reject_data, local: true) do
	{:ok, follower}
	end
	end

	def delete(activity_id, user) do
	with {_, %Activity{data: %{"object" => _, "type" => "Create"}} = activity} <-
	{:find_activity, Activity.get_by_id(activity_id)},
	{_, %Object{} = object, _} <-
	{:find_object, Object.normalize(activity, false), activity},
	true <- User.superuser?(user) \|\| user.ap_id == object.data["actor"],
	{:ok, delete_data, _} <- Builder.delete(user, object.data["id"]),
	{:ok, delete, _} <- Pipeline.common_pipeline(delete_data, local: true) do
	{:ok, delete}
	else
	{:find_activity, _} ->
	{:error, :not_found}

	{:find_object, nil, %Activity{data: %{"actor" => actor, "object" => object}}} ->
	# We have the create activity, but not the object, it was probably pruned.
	# Insert a tombstone and try again
	with {:ok, tombstone_data, _} <- Builder.tombstone(actor, object),
	{:ok, _tombstone} <- Object.create(tombstone_data) do
	delete(activity_id, user)
	else
	_ ->
	Logger.error(
	"Could not insert tombstone for missing object on deletion. Object is #{object}."
	)

	{:error, dgettext("errors", "Could not delete")}
	end

	_ ->
	{:error, dgettext("errors", "Could not delete")}
	end
	end

	def repeat(id, user, params \\ %{}) do
	with %Activity{data: %{"type" => "Create"}} = activity <- Activity.get_by_id(id),
	object = %Object{} <- Object.normalize(activity, false),
	{_, nil} <- {:existing_announce, Utils.get_existing_announce(user.ap_id, object)},
	public = public_announce?(object, params),
	{:ok, announce, _} <- Builder.announce(user, object, public: public),
	{:ok, activity, _} <- Pipeline.common_pipeline(announce, local: true) do
	{:ok, activity}
	else
	{:existing_announce, %Activity{} = announce} ->
	{:ok, announce}

	_ ->
	{:error, :not_found}
	end
	end

	def unrepeat(id, user) do
	with {_, %Activity{data: %{"type" => "Create"}} = activity} <-
	{:find_activity, Activity.get_by_id(id)},
	%Object{} = note <- Object.normalize(activity, false),
	%Activity{} = announce <- Utils.get_existing_announce(user.ap_id, note),
	{:ok, undo, _} <- Builder.undo(user, announce),
	{:ok, activity, _} <- Pipeline.common_pipeline(undo, local: true) do
	{:ok, activity}
	else
	{:find_activity, _} -> {:error, :not_found}
	_ -> {:error, dgettext("errors", "Could not unrepeat")}
	end
	end

	@spec favorite(User.t(), binary()) :: {:ok, Activity.t() \| :already_liked} \| {:error, any()}
	def favorite(%User{} = user, id) do
	case favorite_helper(user, id) do
	{:ok, _} = res ->
	res

	{:error, :not_found} = res ->
	res

	{:error, e} ->
	Logger.error("Could not favorite #{id}. Error: #{inspect(e, pretty: true)}")
	{:error, dgettext("errors", "Could not favorite")}
	end
	end

	def favorite_helper(user, id) do
	with {_, %Activity{object: object}} <- {:find_object, Activity.get_by_id_with_object(id)},
	{_, {:ok, like_object, meta}} <- {:build_object, Builder.like(user, object)},
	{_, {:ok, %Activity{} = activity, _meta}} <-
	{:common_pipeline,
	Pipeline.common_pipeline(like_object, Keyword.put(meta, :local, true))} do
	{:ok, activity}
	else
	{:find_object, _} ->
	{:error, :not_found}

	{:common_pipeline,
	{
	:error,
	{
	:validate_object,
	{
	:error,
	changeset
	}
	}
	}} = e ->
	if {:object, {"already liked by this actor", []}} in changeset.errors do
	{:ok, :already_liked}
	else
	{:error, e}
	end

	e ->
	{:error, e}
	end
	end

	def unfavorite(id, user) do
	with {_, %Activity{data: %{"type" => "Create"}} = activity} <-
	{:find_activity, Activity.get_by_id(id)},
	%Object{} = note <- Object.normalize(activity, false),
	%Activity{} = like <- Utils.get_existing_like(user.ap_id, note),
	{:ok, undo, _} <- Builder.undo(user, like),
	{:ok, activity, _} <- Pipeline.common_pipeline(undo, local: true) do
	{:ok, activity}
	else
	{:find_activity, _} -> {:error, :not_found}
	_ -> {:error, dgettext("errors", "Could not unfavorite")}
	end
	end

	def react_with_emoji(id, user, emoji) do
	with %Activity{} = activity <- Activity.get_by_id(id),
	object <- Object.normalize(activity),
	{:ok, emoji_react, _} <- Builder.emoji_react(user, object, emoji),
	{:ok, activity, _} <- Pipeline.common_pipeline(emoji_react, local: true) do
	{:ok, activity}
	else
	_ ->
	{:error, dgettext("errors", "Could not add reaction emoji")}
	end
	end

	def unreact_with_emoji(id, user, emoji) do
	with %Activity{} = reaction_activity <- Utils.get_latest_reaction(id, user, emoji),
	{:ok, undo, _} <- Builder.undo(user, reaction_activity),
	{:ok, activity, _} <- Pipeline.common_pipeline(undo, local: true) do
	{:ok, activity}
	else
	_ ->
	{:error, dgettext("errors", "Could not remove reaction emoji")}
	end
	end

	def vote(user, %{data: %{"type" => "Question"}} = object, choices) do
	with :ok <- validate_not_author(object, user),
	:ok <- validate_existing_votes(user, object),
	{:ok, options, choices} <- normalize_and_validate_choices(choices, object) do
	answer_activities =
	Enum.map(choices, fn index ->
	{:ok, answer_object, _meta} =
	Builder.answer(user, object, Enum.at(options, index)["name"])

	{:ok, activity_data, _meta} = Builder.create(user, answer_object, [])

	{:ok, activity, _meta} =
	activity_data
	\|> Map.put("cc", answer_object["cc"])
	\|> Map.put("context", answer_object["context"])
	\|> Pipeline.common_pipeline(local: true)

	# TODO: Do preload of Pleroma.Object in Pipeline
	Activity.normalize(activity.data)
	end)

	object = Object.get_cached_by_ap_id(object.data["id"])
	{:ok, answer_activities, object}
	end
	end

	defp validate_not_author(%{data: %{"actor" => ap_id}}, %{ap_id: ap_id}),
	do: {:error, dgettext("errors", "Poll's author can't vote")}

	defp validate_not_author(_, _), do: :ok

	defp validate_existing_votes(%{ap_id: ap_id}, object) do
	if Utils.get_existing_votes(ap_id, object) == [] do
	:ok
	else
	{:error, dgettext("errors", "Already voted")}
	end
	end

	defp get_options_and_max_count(%{data: %{"anyOf" => any_of}})
	when is_list(any_of) and any_of != [],
	do: {any_of, Enum.count(any_of)}

	defp get_options_and_max_count(%{data: %{"oneOf" => one_of}})
	when is_list(one_of) and one_of != [],
	do: {one_of, 1}

	defp normalize_and_validate_choices(choices, object) do
	choices = Enum.map(choices, fn i -> if is_binary(i), do: String.to_integer(i), else: i end)
	{options, max_count} = get_options_and_max_count(object)
	count = Enum.count(options)

	with {_, true} <- {:valid_choice, Enum.all?(choices, &(&1 < count))},
	{_, true} <- {:count_check, Enum.count(choices) <= max_count} do
	{:ok, options, choices}
	else
	{:valid_choice, _} -> {:error, dgettext("errors", "Invalid indices")}
	{:count_check, _} -> {:error, dgettext("errors", "Too many choices")}
	end
	end

	def public_announce?(_, %{visibility: visibility})
	when visibility in ~w{public unlisted private direct},
	do: visibility in ~w(public unlisted)

	def public_announce?(object, _) do
	Visibility.is_public?(object)
	end

	def get_visibility(_, _, %Participation{}), do: {"direct", "direct"}

	def get_visibility(%{visibility: visibility}, in_reply_to, _)
	when visibility in ~w{public unlisted private direct},
	do: {visibility, get_replied_to_visibility(in_reply_to)}

	def get_visibility(%{visibility: "list:" <> list_id}, in_reply_to, _) do
	visibility = {:list, String.to_integer(list_id)}
	{visibility, get_replied_to_visibility(in_reply_to)}
	end

	def get_visibility(_, in_reply_to, _) when not is_nil(in_reply_to) do
	visibility = get_replied_to_visibility(in_reply_to)
	{visibility, visibility}
	end

	def get_visibility(_, in_reply_to, _), do: {"public", get_replied_to_visibility(in_reply_to)}

	def get_replied_to_visibility(nil), do: nil

	def get_replied_to_visibility(activity) do
	with %Object{} = object <- Object.normalize(activity) do
	Visibility.get_visibility(object)
	end
	end

	def check_expiry_date({:ok, nil} = res), do: res

	def check_expiry_date({:ok, in_seconds}) do
	expiry = NaiveDateTime.utc_now() \|> NaiveDateTime.add(in_seconds)

	if ActivityExpiration.expires_late_enough?(expiry) do
	{:ok, expiry}
	else
	{:error, "Expiry date is too soon"}
	end
	end

	def check_expiry_date(expiry_str) do
	Ecto.Type.cast(:integer, expiry_str)
	\|> check_expiry_date()
	end

	def listen(user, data) do
	visibility = Map.get(data, :visibility, "public")

	with {to, cc} <- get_to_and_cc(user, [], nil, visibility, nil),
	listen_data <-
	data
	\|> Map.take([:album, :artist, :title, :length])
	\|> Map.new(fn {key, value} -> {to_string(key), value} end)
	\|> Map.put("type", "Audio")
	\|> Map.put("to", to)
	\|> Map.put("cc", cc)
	\|> Map.put("actor", user.ap_id),
	{:ok, activity} <-
	ActivityPub.listen(%{
	actor: user,
	to: to,
	object: listen_data,
	context: Utils.generate_context_id(),
	additional: %{"cc" => cc}
	}) do
	{:ok, activity}
	end
	end

	def post(user, %{status: _} = data) do
	with {:ok, draft} <- Pleroma.Web.CommonAPI.ActivityDraft.create(user, data) do
	ActivityPub.create(draft.changes, draft.preview?)
	end
	end

	def pin(id, %{ap_id: user_ap_id} = user) do
	with %Activity{
	actor: ^user_ap_id,
	data: %{"type" => "Create"},
	object: %Object{data: %{"type" => object_type}}
	} = activity <- Activity.get_by_id_with_object(id),
	true <- object_type in ["Note", "Article", "Question"],
	true <- Visibility.is_public?(activity),
	{:ok, _user} <- User.add_pinnned_activity(user, activity) do
	{:ok, activity}
	else
	{:error, %{errors: [pinned_activities: {err, _}]}} -> {:error, err}
	_ -> {:error, dgettext("errors", "Could not pin")}
	end
	end

	def unpin(id, user) do
	with %Activity{data: %{"type" => "Create"}} = activity <- Activity.get_by_id(id),
	{:ok, _user} <- User.remove_pinnned_activity(user, activity) do
	{:ok, activity}
	else
	{:error, %{errors: [pinned_activities: {err, _}]}} -> {:error, err}
	_ -> {:error, dgettext("errors", "Could not unpin")}
	end
	end

	def add_mute(user, activity) do
	with {:ok, _} <- ThreadMute.add_mute(user.id, activity.data["context"]),
	- _ <- Pleroma.Notification.mark_as_read(user, activity) do
	+ _ <- Pleroma.Notification.mark_context_as_read(user, activity.data["context"]) do
	{:ok, activity}
	else
	{:error, _} -> {:error, dgettext("errors", "conversation is already muted")}
	end
	end

	def remove_mute(user, activity) do
	ThreadMute.remove_mute(user.id, activity.data["context"])
	{:ok, activity}
	end

	def thread_muted?(%User{id: user_id}, %{data: %{"context" => context}})
	when is_binary(context) do
	ThreadMute.exists?(user_id, context)
	end

	def thread_muted?(_, _), do: false

	def report(user, data) do
	with {:ok, account} <- get_reported_account(data.account_id),
	{:ok, {content_html, _, _}} <- make_report_content_html(data[:comment]),
	{:ok, statuses} <- get_report_statuses(account, data) do
	ActivityPub.flag(%{
	context: Utils.generate_context_id(),
	actor: user,
	account: account,
	statuses: statuses,
	content: content_html,
	forward: Map.get(data, :forward, false)
	})
	end
	end

	defp get_reported_account(account_id) do
	case User.get_cached_by_id(account_id) do
	%User{} = account -> {:ok, account}
	_ -> {:error, dgettext("errors", "Account not found")}
	end
	end

	def update_report_state(activity_ids, state) when is_list(activity_ids) do
	case Utils.update_report_state(activity_ids, state) do
	:ok -> {:ok, activity_ids}
	_ -> {:error, dgettext("errors", "Could not update state")}
	end
	end

	def update_report_state(activity_id, state) do
	with %Activity{} = activity <- Activity.get_by_id(activity_id) do
	Utils.update_report_state(activity, state)
	else
	nil -> {:error, :not_found}
	_ -> {:error, dgettext("errors", "Could not update state")}
	end
	end

	def update_activity_scope(activity_id, opts \\ %{}) do
	with %Activity{} = activity <- Activity.get_by_id_with_object(activity_id),
	{:ok, activity} <- toggle_sensitive(activity, opts) do
	set_visibility(activity, opts)
	else
	nil -> {:error, :not_found}
	{:error, reason} -> {:error, reason}
	end
	end

	defp toggle_sensitive(activity, %{sensitive: sensitive}) when sensitive in ~w(true false) do
	toggle_sensitive(activity, %{sensitive: String.to_existing_atom(sensitive)})
	end

	defp toggle_sensitive(%Activity{object: object} = activity, %{sensitive: sensitive})
	when is_boolean(sensitive) do
	new_data = Map.put(object.data, "sensitive", sensitive)

	{:ok, object} =
	object
	\|> Object.change(%{data: new_data})
	\|> Object.update_and_set_cache()

	{:ok, Map.put(activity, :object, object)}
	end

	defp toggle_sensitive(activity, _), do: {:ok, activity}

	defp set_visibility(activity, %{visibility: visibility}) do
	Utils.update_activity_visibility(activity, visibility)
	end

	defp set_visibility(activity, _), do: {:ok, activity}

	def hide_reblogs(%User{} = user, %User{} = target) do
	UserRelationship.create_reblog_mute(user, target)
	end

	def show_reblogs(%User{} = user, %User{} = target) do
	UserRelationship.delete_reblog_mute(user, target)
	end
	end

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