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	diff --git a/CONFIGURATION.md b/CONFIGURATION.md
	index 6b2821b21..3f0ecafb5 100644
	--- a/CONFIGURATION.md
	+++ b/CONFIGURATION.md
	@@ -1,74 +1,91 @@
	# Configuring Pleroma

	In the `config/` directory, you will find the following relevant files:

	* `config.exs`: default base configuration
	* `dev.exs`: default additional configuration for `MIX_ENV=dev`
	* `prod.exs`: default additional configuration for `MIX_ENV=prod`


	Do not modify files in the list above.
	Instead, overload the settings by editing the following files:

	* `dev.secret.exs`: custom additional configuration for `MIX_ENV=dev`
	* `prod.secret.exs`: custom additional configuration for `MIX_ENV=prod`

	+## Block functionality
	+
	+ config :pleroma, :activitypub,
	+ accept_blocks: true,
	+ unfollow_blocked: true,
	+ outgoing_blocks: true
	+
	+ config :pleroma, :user, deny_follow_blocked: true
	+
	+* `accept_blocks`: whether to accept incoming block activities from
	+ other instances
	+* `unfollow_blocked`: whether blocks result in people getting
	+ unfollowed
	+* `outgoing_blocks`: whether to federate blocks to other instances
	+* `deny_follow_blocked`: whether to disallow following an account that
	+ has blocked the user in question
	+
	## Message Rewrite Filters (MRFs)

	Modify incoming and outgoing posts.

	config :pleroma, :instance,
	rewrite_policy: Pleroma.Web.ActivityPub.MRF.NoOpPolicy

	`rewrite_policy` specifies which MRF policies to apply.
	It can either be a single policy or a list of policies.
	Currently, MRFs availible by default are:

	* `Pleroma.Web.ActivityPub.MRF.NoOpPolicy`
	* `Pleroma.Web.ActivityPub.MRF.DropPolicy`
	* `Pleroma.Web.ActivityPub.MRF.SimplePolicy`
	* `Pleroma.Web.ActivityPub.MRF.RejectNonPublic`

	Some policies, such as SimplePolicy and RejectNonPublic,
	can be additionally configured in their respective sections.

	### NoOpPolicy

	Does not modify posts (this is the default `rewrite_policy`)

	### DropPolicy

	Drops all posts.
	It generally does not make sense to use this in production.

	### SimplePolicy

	Restricts the visibility of posts from certain instances.

	config :pleroma, :mrf_simple,
	media_removal: [],
	media_nsfw: [],
	federated_timeline_removal: [],
	reject: [],
	accept: []

	* `media_removal`: posts from these instances will have attachments
	removed
	* `media_nsfw`: posts from these instances will have attachments marked
	as nsfw
	* `federated_timeline_removal`: posts from these instances will be
	marked as unlisted
	* `reject`: posts from these instances will be dropped
	* `accept`: if not empty, only posts from these instances will be accepted

	### RejectNonPublic

	Drops posts with non-public visibility settings.

	config :pleroma :mrf_rejectnonpublic
	allow_followersonly: false,
	allow_direct: false,

	* `allow_followersonly`: whether to allow follower-only posts through
	the filter
	* `allow_direct`: whether to allow direct messages through the filter
	diff --git a/config/config.exs b/config/config.exs
	index e180cc302..cf6cbaa9d 100644
	--- a/config/config.exs
	+++ b/config/config.exs
	@@ -1,93 +1,98 @@
	# This file is responsible for configuring your application
	# and its dependencies with the aid of the Mix.Config module.
	#
	# This configuration file is loaded before any dependency and
	# is restricted to this project.
	use Mix.Config

	# General application configuration
	config :pleroma, ecto_repos: [Pleroma.Repo]

	config :pleroma, Pleroma.Repo, types: Pleroma.PostgresTypes

	config :pleroma, Pleroma.Upload, uploads: "uploads"

	# Configures the endpoint
	config :pleroma, Pleroma.Web.Endpoint,
	url: [host: "localhost"],
	protocol: "https",
	secret_key_base: "aK4Abxf29xU9TTDKre9coZPUgevcVCFQJe/5xP/7Lt4BEif6idBIbjupVbOrbKxl",
	render_errors: [view: Pleroma.Web.ErrorView, accepts: ~w(json)],
	pubsub: [name: Pleroma.PubSub, adapter: Phoenix.PubSub.PG2]

	# Configures Elixir's Logger
	config :logger, :console,
	format: "$time $metadata[$level] $message\n",
	metadata: [:request_id]

	config :mime, :types, %{
	"application/xml" => ["xml"],
	"application/xrd+xml" => ["xrd+xml"],
	"application/activity+json" => ["activity+json"],
	"application/ld+json" => ["activity+json"]
	}

	config :pleroma, :websub, Pleroma.Web.Websub
	config :pleroma, :ostatus, Pleroma.Web.OStatus
	config :pleroma, :httpoison, Pleroma.HTTP

	version =
	with {version, 0} <- System.cmd("git", ["rev-parse", "HEAD"]) do
	"Pleroma #{Mix.Project.config()[:version]} #{String.trim(version)}"
	else
	_ -> "Pleroma #{Mix.Project.config()[:version]} dev"
	end

	# Configures http settings, upstream proxy etc.
	config :pleroma, :http, proxy_url: nil

	config :pleroma, :instance,
	version: version,
	name: "Pleroma",
	email: "example@example.com",
	limit: 5000,
	upload_limit: 16_000_000,
	registrations_open: true,
	federating: true,
	rewrite_policy: Pleroma.Web.ActivityPub.MRF.NoOpPolicy,
	public: true,
	quarantined_instances: []

	-config :pleroma, :activitypub, accept_blocks: true
	+config :pleroma, :activitypub,
	+ accept_blocks: true,
	+ unfollow_blocked: true,
	+ outgoing_blocks: true
	+
	+config :pleroma, :user, deny_follow_blocked: true

	config :pleroma, :mrf_rejectnonpublic,
	allow_followersonly: false,
	allow_direct: false

	config :pleroma, :mrf_simple,
	media_removal: [],
	media_nsfw: [],
	federated_timeline_removal: [],
	reject: [],
	accept: []

	config :pleroma, :media_proxy,
	enabled: false,
	redirect_on_failure: true

	# base_url: "https://cache.pleroma.social"

	config :pleroma, :chat, enabled: true

	config :ecto, json_library: Jason

	config :phoenix, :format_encoders, json: Jason

	config :pleroma, :gopher,
	enabled: false,
	ip: {0, 0, 0, 0},
	port: 9999

	# Import environment specific config. This must remain at the bottom
	# of this file so it overrides the configuration defined above.
	import_config "#{Mix.env()}.exs"
	diff --git a/lib/pleroma/user.ex b/lib/pleroma/user.ex
	index aba8742a0..94f16c3c0 100644
	--- a/lib/pleroma/user.ex
	+++ b/lib/pleroma/user.ex
	@@ -1,681 +1,688 @@
	defmodule Pleroma.User do
	use Ecto.Schema

	import Ecto.{Changeset, Query}
	alias Pleroma.{Repo, User, Object, Web, Activity, Notification}
	alias Comeonin.Pbkdf2
	alias Pleroma.Web.{OStatus, Websub}
	alias Pleroma.Web.ActivityPub.{Utils, ActivityPub}

	schema "users" do
	field(:bio, :string)
	field(:email, :string)
	field(:name, :string)
	field(:nickname, :string)
	field(:password_hash, :string)
	field(:password, :string, virtual: true)
	field(:password_confirmation, :string, virtual: true)
	field(:following, {:array, :string}, default: [])
	field(:ap_id, :string)
	field(:avatar, :map)
	field(:local, :boolean, default: true)
	field(:info, :map, default: %{})
	field(:follower_address, :string)
	field(:search_distance, :float, virtual: true)
	has_many(:notifications, Notification)

	timestamps()
	end

	def avatar_url(user) do
	case user.avatar do
	%{"url" => [%{"href" => href} \| _]} -> href
	_ -> "#{Web.base_url()}/images/avi.png"
	end
	end

	def banner_url(user) do
	case user.info["banner"] do
	%{"url" => [%{"href" => href} \| _]} -> href
	_ -> "#{Web.base_url()}/images/banner.png"
	end
	end

	def ap_id(%User{nickname: nickname}) do
	"#{Web.base_url()}/users/#{nickname}"
	end

	def ap_followers(%User{} = user) do
	"#{ap_id(user)}/followers"
	end

	def follow_changeset(struct, params \\ %{}) do
	struct
	\|> cast(params, [:following])
	\|> validate_required([:following])
	end

	def info_changeset(struct, params \\ %{}) do
	struct
	\|> cast(params, [:info])
	\|> validate_required([:info])
	end

	def user_info(%User{} = user) do
	oneself = if user.local, do: 1, else: 0

	%{
	following_count: length(user.following) - oneself,
	note_count: user.info["note_count"] \|\| 0,
	follower_count: user.info["follower_count"] \|\| 0,
	locked: user.info["locked"] \|\| false
	}
	end

	@email_regex ~r/^[a-zA-Z0-9.!#$%&'+\/=?^_`{\|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)$/
	def remote_user_creation(params) do
	changes =
	%User{}
	\|> cast(params, [:bio, :name, :ap_id, :nickname, :info, :avatar])
	\|> validate_required([:name, :ap_id, :nickname])
	\|> unique_constraint(:nickname)
	\|> validate_format(:nickname, @email_regex)
	\|> validate_length(:bio, max: 5000)
	\|> validate_length(:name, max: 100)
	\|> put_change(:local, false)

	if changes.valid? do
	case changes.changes[:info]["source_data"] do
	%{"followers" => followers} ->
	changes
	\|> put_change(:follower_address, followers)

	_ ->
	followers = User.ap_followers(%User{nickname: changes.changes[:nickname]})

	changes
	\|> put_change(:follower_address, followers)
	end
	else
	changes
	end
	end

	def update_changeset(struct, params \\ %{}) do
	struct
	\|> cast(params, [:bio, :name])
	\|> unique_constraint(:nickname)
	\|> validate_format(:nickname, ~r/^[a-zA-Z\d]+$/)
	\|> validate_length(:bio, max: 5000)
	\|> validate_length(:name, min: 1, max: 100)
	end

	def upgrade_changeset(struct, params \\ %{}) do
	struct
	\|> cast(params, [:bio, :name, :info, :follower_address, :avatar])
	\|> unique_constraint(:nickname)
	\|> validate_format(:nickname, ~r/^[a-zA-Z\d]+$/)
	\|> validate_length(:bio, max: 5000)
	\|> validate_length(:name, max: 100)
	end

	def password_update_changeset(struct, params) do
	changeset =
	struct
	\|> cast(params, [:password, :password_confirmation])
	\|> validate_required([:password, :password_confirmation])
	\|> validate_confirmation(:password)

	if changeset.valid? do
	hashed = Pbkdf2.hashpwsalt(changeset.changes[:password])

	changeset
	\|> put_change(:password_hash, hashed)
	else
	changeset
	end
	end

	def reset_password(user, data) do
	update_and_set_cache(password_update_changeset(user, data))
	end

	def register_changeset(struct, params \\ %{}) do
	changeset =
	struct
	\|> cast(params, [:bio, :email, :name, :nickname, :password, :password_confirmation])
	\|> validate_required([:email, :name, :nickname, :password, :password_confirmation])
	\|> validate_confirmation(:password)
	\|> unique_constraint(:email)
	\|> unique_constraint(:nickname)
	\|> validate_format(:nickname, ~r/^[a-zA-Z\d]+$/)
	\|> validate_format(:email, @email_regex)
	\|> validate_length(:bio, max: 1000)
	\|> validate_length(:name, min: 1, max: 100)

	if changeset.valid? do
	hashed = Pbkdf2.hashpwsalt(changeset.changes[:password])
	ap_id = User.ap_id(%User{nickname: changeset.changes[:nickname]})
	followers = User.ap_followers(%User{nickname: changeset.changes[:nickname]})

	changeset
	\|> put_change(:password_hash, hashed)
	\|> put_change(:ap_id, ap_id)
	\|> put_change(:following, [followers])
	\|> put_change(:follower_address, followers)
	else
	changeset
	end
	end

	def maybe_direct_follow(%User{} = follower, %User{info: info} = followed) do
	+ user_config = Application.get_env(:pleroma, :user)
	+ deny_follow_blocked = Keyword.get(user_config, :deny_follow_blocked)
	+
	user_info = user_info(followed)

	should_direct_follow =
	cond do
	# if the account is locked, don't pre-create the relationship
	user_info[:locked] == true ->
	false

	# if the users are blocking each other, we shouldn't even be here, but check for it anyway
	- User.blocks?(follower, followed) == true or User.blocks?(followed, follower) == true ->
	+ deny_follow_blocked and
	+ (User.blocks?(follower, followed) or User.blocks?(followed, follower)) ->
	false

	# if OStatus, then there is no three-way handshake to follow
	User.ap_enabled?(followed) != true ->
	true

	# if there are no other reasons not to, just pre-create the relationship
	true ->
	true
	end

	if should_direct_follow do
	follow(follower, followed)
	else
	{:ok, follower}
	end
	end

	def maybe_follow(%User{} = follower, %User{info: info} = followed) do
	if not following?(follower, followed) do
	follow(follower, followed)
	else
	{:ok, follower}
	end
	end

	def follow(%User{} = follower, %User{info: info} = followed) do
	+ user_config = Application.get_env(:pleroma, :user)
	+ deny_follow_blocked = Keyword.get(user_config, :deny_follow_blocked)
	+
	ap_followers = followed.follower_address

	cond do
	following?(follower, followed) or info["deactivated"] ->
	{:error, "Could not follow user: #{followed.nickname} is already on your list."}

	- blocks?(followed, follower) ->
	+ deny_follow_blocked and blocks?(followed, follower) ->
	{:error, "Could not follow user: #{followed.nickname} blocked you."}

	true ->
	if !followed.local && follower.local && !ap_enabled?(followed) do
	Websub.subscribe(follower, followed)
	end

	following =
	[ap_followers \| follower.following]
	\|> Enum.uniq()

	follower =
	follower
	\|> follow_changeset(%{following: following})
	\|> update_and_set_cache

	{:ok, _} = update_follower_count(followed)

	follower
	end
	end

	def unfollow(%User{} = follower, %User{} = followed) do
	ap_followers = followed.follower_address

	if following?(follower, followed) and follower.ap_id != followed.ap_id do
	following =
	follower.following
	\|> List.delete(ap_followers)

	{:ok, follower} =
	follower
	\|> follow_changeset(%{following: following})
	\|> update_and_set_cache

	{:ok, followed} = update_follower_count(followed)

	{:ok, follower, Utils.fetch_latest_follow(follower, followed)}
	else
	{:error, "Not subscribed!"}
	end
	end

	def following?(%User{} = follower, %User{} = followed) do
	Enum.member?(follower.following, followed.follower_address)
	end

	def locked?(%User{} = user) do
	user.info["locked"] \|\| false
	end

	def get_by_ap_id(ap_id) do
	Repo.get_by(User, ap_id: ap_id)
	end

	def update_and_set_cache(changeset) do
	with {:ok, user} <- Repo.update(changeset) do
	Cachex.put(:user_cache, "ap_id:#{user.ap_id}", user)
	Cachex.put(:user_cache, "nickname:#{user.nickname}", user)
	Cachex.put(:user_cache, "user_info:#{user.id}", user_info(user))
	{:ok, user}
	else
	e -> e
	end
	end

	def invalidate_cache(user) do
	Cachex.del(:user_cache, "ap_id:#{user.ap_id}")
	Cachex.del(:user_cache, "nickname:#{user.nickname}")
	end

	def get_cached_by_ap_id(ap_id) do
	key = "ap_id:#{ap_id}"
	Cachex.fetch!(:user_cache, key, fn _ -> get_by_ap_id(ap_id) end)
	end

	def get_cached_by_nickname(nickname) do
	key = "nickname:#{nickname}"
	Cachex.fetch!(:user_cache, key, fn _ -> get_or_fetch_by_nickname(nickname) end)
	end

	def get_by_nickname(nickname) do
	Repo.get_by(User, nickname: nickname)
	end

	def get_by_nickname_or_email(nickname_or_email) do
	case user = Repo.get_by(User, nickname: nickname_or_email) do
	%User{} -> user
	nil -> Repo.get_by(User, email: nickname_or_email)
	end
	end

	def get_cached_user_info(user) do
	key = "user_info:#{user.id}"
	Cachex.fetch!(:user_cache, key, fn _ -> user_info(user) end)
	end

	def fetch_by_nickname(nickname) do
	ap_try = ActivityPub.make_user_from_nickname(nickname)

	case ap_try do
	{:ok, user} -> {:ok, user}
	_ -> OStatus.make_user(nickname)
	end
	end

	def get_or_fetch_by_nickname(nickname) do
	with %User{} = user <- get_by_nickname(nickname) do
	user
	else
	_e ->
	with [_nick, _domain] <- String.split(nickname, "@"),
	{:ok, user} <- fetch_by_nickname(nickname) do
	user
	else
	_e -> nil
	end
	end
	end

	def get_followers_query(%User{id: id, follower_address: follower_address}) do
	from(
	u in User,
	where: fragment("? <@ ?", ^[follower_address], u.following),
	where: u.id != ^id
	)
	end

	def get_followers(user) do
	q = get_followers_query(user)

	{:ok, Repo.all(q)}
	end

	def get_friends_query(%User{id: id, following: following}) do
	from(
	u in User,
	where: u.follower_address in ^following,
	where: u.id != ^id
	)
	end

	def get_friends(user) do
	q = get_friends_query(user)

	{:ok, Repo.all(q)}
	end

	def get_follow_requests_query(%User{} = user) do
	from(
	a in Activity,
	where:
	fragment(
	"? ->> 'type' = 'Follow'",
	a.data
	),
	where:
	fragment(
	"? ->> 'state' = 'pending'",
	a.data
	),
	where:
	fragment(
	"? @> ?",
	a.data,
	^%{"object" => user.ap_id}
	)
	)
	end

	def get_follow_requests(%User{} = user) do
	q = get_follow_requests_query(user)
	reqs = Repo.all(q)

	users =
	Enum.map(reqs, fn req -> req.actor end)
	\|> Enum.uniq()
	\|> Enum.map(fn ap_id -> get_by_ap_id(ap_id) end)

	{:ok, users}
	end

	def increase_note_count(%User{} = user) do
	note_count = (user.info["note_count"] \|\| 0) + 1
	new_info = Map.put(user.info, "note_count", note_count)

	cs = info_changeset(user, %{info: new_info})

	update_and_set_cache(cs)
	end

	def decrease_note_count(%User{} = user) do
	note_count = user.info["note_count"] \|\| 0
	note_count = if note_count <= 0, do: 0, else: note_count - 1
	new_info = Map.put(user.info, "note_count", note_count)

	cs = info_changeset(user, %{info: new_info})

	update_and_set_cache(cs)
	end

	def update_note_count(%User{} = user) do
	note_count_query =
	from(
	a in Object,
	where: fragment("?->>'actor' = ? and ?->>'type' = 'Note'", a.data, ^user.ap_id, a.data),
	select: count(a.id)
	)

	note_count = Repo.one(note_count_query)

	new_info = Map.put(user.info, "note_count", note_count)

	cs = info_changeset(user, %{info: new_info})

	update_and_set_cache(cs)
	end

	def update_follower_count(%User{} = user) do
	follower_count_query =
	from(
	u in User,
	where: ^user.follower_address in u.following,
	where: u.id != ^user.id,
	select: count(u.id)
	)

	follower_count = Repo.one(follower_count_query)

	new_info = Map.put(user.info, "follower_count", follower_count)

	cs = info_changeset(user, %{info: new_info})

	update_and_set_cache(cs)
	end

	def get_notified_from_activity(%Activity{recipients: to}) do
	query =
	from(
	u in User,
	where: u.ap_id in ^to,
	where: u.local == true
	)

	Repo.all(query)
	end

	def get_recipients_from_activity(%Activity{recipients: to}) do
	query =
	from(
	u in User,
	where: u.ap_id in ^to,
	or_where: fragment("? && ?", u.following, ^to)
	)

	query = from(u in query, where: u.local == true)

	Repo.all(query)
	end

	def search(query, resolve) do
	# strip the beginning @ off if there is a query
	query = String.trim_leading(query, "@")

	if resolve do
	User.get_or_fetch_by_nickname(query)
	end

	inner =
	from(
	u in User,
	select_merge: %{
	search_distance:
	fragment(
	"? <-> (? \|\| ?)",
	^query,
	u.nickname,
	u.name
	)
	}
	)

	q =
	from(
	s in subquery(inner),
	order_by: s.search_distance,
	limit: 20
	)

	Repo.all(q)
	end

	def block(blocker, %User{ap_id: ap_id} = blocked) do
	# sever any follow relationships to prevent leaks per activitypub (Pleroma issue #213)
	blocker =
	if following?(blocker, blocked) do
	{:ok, blocker, _} = unfollow(blocker, blocked)
	blocker
	else
	blocker
	end

	if following?(blocked, blocker) do
	unfollow(blocked, blocker)
	end

	blocks = blocker.info["blocks"] \|\| []
	new_blocks = Enum.uniq([ap_id \| blocks])
	new_info = Map.put(blocker.info, "blocks", new_blocks)

	cs = User.info_changeset(blocker, %{info: new_info})
	update_and_set_cache(cs)
	end

	# helper to handle the block given only an actor's AP id
	def block(blocker, %{ap_id: ap_id}) do
	block(blocker, User.get_by_ap_id(ap_id))
	end

	def unblock(user, %{ap_id: ap_id}) do
	blocks = user.info["blocks"] \|\| []
	new_blocks = List.delete(blocks, ap_id)
	new_info = Map.put(user.info, "blocks", new_blocks)

	cs = User.info_changeset(user, %{info: new_info})
	update_and_set_cache(cs)
	end

	def blocks?(user, %{ap_id: ap_id}) do
	blocks = user.info["blocks"] \|\| []
	domain_blocks = user.info["domain_blocks"] \|\| []
	%{host: host} = URI.parse(ap_id)

	Enum.member?(blocks, ap_id) \|\|
	Enum.any?(domain_blocks, fn domain ->
	host == domain
	end)
	end

	def block_domain(user, domain) do
	domain_blocks = user.info["domain_blocks"] \|\| []
	new_blocks = Enum.uniq([domain \| domain_blocks])
	new_info = Map.put(user.info, "domain_blocks", new_blocks)

	cs = User.info_changeset(user, %{info: new_info})
	update_and_set_cache(cs)
	end

	def unblock_domain(user, domain) do
	blocks = user.info["domain_blocks"] \|\| []
	new_blocks = List.delete(blocks, domain)
	new_info = Map.put(user.info, "domain_blocks", new_blocks)

	cs = User.info_changeset(user, %{info: new_info})
	update_and_set_cache(cs)
	end

	def local_user_query() do
	from(u in User, where: u.local == true)
	end

	def deactivate(%User{} = user) do
	new_info = Map.put(user.info, "deactivated", true)
	cs = User.info_changeset(user, %{info: new_info})
	update_and_set_cache(cs)
	end

	def delete(%User{} = user) do
	{:ok, user} = User.deactivate(user)

	# Remove all relationships
	{:ok, followers} = User.get_followers(user)

	followers
	\|> Enum.each(fn follower -> User.unfollow(follower, user) end)

	{:ok, friends} = User.get_friends(user)

	friends
	\|> Enum.each(fn followed -> User.unfollow(user, followed) end)

	query = from(a in Activity, where: a.actor == ^user.ap_id)

	Repo.all(query)
	\|> Enum.each(fn activity ->
	case activity.data["type"] do
	"Create" ->
	ActivityPub.delete(Object.get_by_ap_id(activity.data["object"]["id"]))

	# TODO: Do something with likes, follows, repeats.
	_ ->
	"Doing nothing"
	end
	end)

	:ok
	end

	def get_or_fetch_by_ap_id(ap_id) do
	if user = get_by_ap_id(ap_id) do
	user
	else
	ap_try = ActivityPub.make_user_from_ap_id(ap_id)

	case ap_try do
	{:ok, user} ->
	user

	_ ->
	case OStatus.make_user(ap_id) do
	{:ok, user} -> user
	_ -> {:error, "Could not fetch by AP id"}
	end
	end
	end
	end

	# AP style
	def public_key_from_info(%{
	"source_data" => %{"publicKey" => %{"publicKeyPem" => public_key_pem}}
	}) do
	key =
	:public_key.pem_decode(public_key_pem)
	\|> hd()
	\|> :public_key.pem_entry_decode()

	{:ok, key}
	end

	# OStatus Magic Key
	def public_key_from_info(%{"magic_key" => magic_key}) do
	{:ok, Pleroma.Web.Salmon.decode_key(magic_key)}
	end

	def get_public_key_for_ap_id(ap_id) do
	with %User{} = user <- get_or_fetch_by_ap_id(ap_id),
	{:ok, public_key} <- public_key_from_info(user.info) do
	{:ok, public_key}
	else
	_ -> :error
	end
	end

	defp blank?(""), do: nil
	defp blank?(n), do: n

	def insert_or_update_user(data) do
	data =
	data
	\|> Map.put(:name, blank?(data[:name]) \|\| data[:nickname])

	cs = User.remote_user_creation(data)
	Repo.insert(cs, on_conflict: :replace_all, conflict_target: :nickname)
	end

	def ap_enabled?(%User{info: info}), do: info["ap_enabled"]
	def ap_enabled?(_), do: false

	def get_or_fetch(uri_or_nickname) do
	if String.starts_with?(uri_or_nickname, "http") do
	get_or_fetch_by_ap_id(uri_or_nickname)
	else
	get_or_fetch_by_nickname(uri_or_nickname)
	end
	end
	end
	diff --git a/lib/pleroma/web/activity_pub/activity_pub.ex b/lib/pleroma/web/activity_pub/activity_pub.ex
	index dfcc5b9ed..195679fad 100644
	--- a/lib/pleroma/web/activity_pub/activity_pub.ex
	+++ b/lib/pleroma/web/activity_pub/activity_pub.ex
	@@ -1,703 +1,712 @@
	defmodule Pleroma.Web.ActivityPub.ActivityPub do
	alias Pleroma.{Activity, Repo, Object, Upload, User, Notification}
	alias Pleroma.Web.ActivityPub.{Transmogrifier, MRF}
	alias Pleroma.Web.WebFinger
	alias Pleroma.Web.Federator
	alias Pleroma.Web.OStatus
	import Ecto.Query
	import Pleroma.Web.ActivityPub.Utils
	require Logger

	@httpoison Application.get_env(:pleroma, :httpoison)

	@instance Application.get_env(:pleroma, :instance)

	def get_recipients(data) do
	(data["to"] \|\| []) ++ (data["cc"] \|\| [])
	end

	defp check_actor_is_active(actor) do
	if not is_nil(actor) do
	with user <- User.get_cached_by_ap_id(actor),
	nil <- user.info["deactivated"] do
	:ok
	else
	_e -> :reject
	end
	else
	:ok
	end
	end

	def insert(map, local \\ true) when is_map(map) do
	with nil <- Activity.get_by_ap_id(map["id"]),
	map <- lazy_put_activity_defaults(map),
	:ok <- check_actor_is_active(map["actor"]),
	{:ok, map} <- MRF.filter(map),
	:ok <- insert_full_object(map) do
	{:ok, activity} =
	Repo.insert(%Activity{
	data: map,
	local: local,
	actor: map["actor"],
	recipients: get_recipients(map)
	})

	Notification.create_notifications(activity)
	stream_out(activity)
	{:ok, activity}
	else
	%Activity{} = activity -> {:ok, activity}
	error -> {:error, error}
	end
	end

	def stream_out(activity) do
	public = "https://www.w3.org/ns/activitystreams#Public"

	if activity.data["type"] in ["Create", "Announce"] do
	Pleroma.Web.Streamer.stream("user", activity)
	Pleroma.Web.Streamer.stream("list", activity)

	if Enum.member?(activity.data["to"], public) do
	Pleroma.Web.Streamer.stream("public", activity)

	if activity.local do
	Pleroma.Web.Streamer.stream("public:local", activity)
	end

	if activity.data["object"]["attachment"] != [] do
	Pleroma.Web.Streamer.stream("public:media", activity)

	if activity.local do
	Pleroma.Web.Streamer.stream("public:local:media", activity)
	end
	end
	else
	if !Enum.member?(activity.data["cc"] \|\| [], public) &&
	!Enum.member?(
	activity.data["to"],
	User.get_by_ap_id(activity.data["actor"]).follower_address
	),
	do: Pleroma.Web.Streamer.stream("direct", activity)
	end
	end
	end

	def create(%{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]

	with create_data <-
	make_create_data(
	%{to: to, actor: actor, published: published, context: context, object: object},
	additional
	),
	{:ok, activity} <- insert(create_data, local),
	:ok <- maybe_federate(activity),
	{:ok, _actor} <- User.increase_note_count(actor) do
	{:ok, activity}
	end
	end

	def accept(%{to: to, actor: actor, object: object} = params) do
	# only accept false as false value
	local = !(params[:local] == false)

	with data <- %{"to" => to, "type" => "Accept", "actor" => actor, "object" => object},
	{:ok, activity} <- insert(data, local),
	:ok <- maybe_federate(activity) do
	{:ok, activity}
	end
	end

	def reject(%{to: to, actor: actor, object: object} = params) do
	# only accept false as false value
	local = !(params[:local] == false)

	with data <- %{"to" => to, "type" => "Reject", "actor" => actor, "object" => object},
	{:ok, activity} <- insert(data, local),
	:ok <- maybe_federate(activity) do
	{:ok, activity}
	end
	end

	def update(%{to: to, cc: cc, actor: actor, object: object} = params) do
	# only accept false as false value
	local = !(params[:local] == false)

	with data <- %{
	"to" => to,
	"cc" => cc,
	"type" => "Update",
	"actor" => actor,
	"object" => object
	},
	{:ok, activity} <- insert(data, local),
	:ok <- maybe_federate(activity) do
	{:ok, activity}
	end
	end

	# TODO: This is weird, maybe we shouldn't check here if we can make the activity.
	def like(
	%User{ap_id: ap_id} = user,
	%Object{data: %{"id" => _}} = object,
	activity_id \\ nil,
	local \\ true
	) do
	with nil <- get_existing_like(ap_id, object),
	like_data <- make_like_data(user, object, activity_id),
	{:ok, activity} <- insert(like_data, local),
	{:ok, object} <- add_like_to_object(activity, object),
	:ok <- maybe_federate(activity) do
	{:ok, activity, object}
	else
	%Activity{} = activity -> {:ok, activity, object}
	error -> {:error, error}
	end
	end

	def unlike(
	%User{} = actor,
	%Object{} = object,
	activity_id \\ nil,
	local \\ true
	) do
	with %Activity{} = like_activity <- get_existing_like(actor.ap_id, object),
	unlike_data <- make_unlike_data(actor, like_activity, activity_id),
	{:ok, unlike_activity} <- insert(unlike_data, local),
	{:ok, _activity} <- Repo.delete(like_activity),
	{:ok, object} <- remove_like_from_object(like_activity, object),
	:ok <- maybe_federate(unlike_activity) do
	{:ok, unlike_activity, like_activity, object}
	else
	_e -> {:ok, object}
	end
	end

	def announce(
	%User{ap_id: _} = user,
	%Object{data: %{"id" => _}} = object,
	activity_id \\ nil,
	local \\ true
	) do
	with true <- is_public?(object),
	announce_data <- make_announce_data(user, object, activity_id),
	{:ok, activity} <- insert(announce_data, local),
	{:ok, object} <- add_announce_to_object(activity, object),
	:ok <- maybe_federate(activity) do
	{:ok, activity, object}
	else
	error -> {:error, error}
	end
	end

	def unannounce(
	%User{} = actor,
	%Object{} = object,
	activity_id \\ nil,
	local \\ true
	) do
	with %Activity{} = announce_activity <- get_existing_announce(actor.ap_id, object),
	unannounce_data <- make_unannounce_data(actor, announce_activity, activity_id),
	{:ok, unannounce_activity} <- insert(unannounce_data, local),
	:ok <- maybe_federate(unannounce_activity),
	{:ok, _activity} <- Repo.delete(announce_activity),
	{:ok, object} <- remove_announce_from_object(announce_activity, object) do
	{:ok, unannounce_activity, object}
	else
	_e -> {:ok, object}
	end
	end

	def follow(follower, followed, activity_id \\ nil, local \\ true) do
	with data <- make_follow_data(follower, followed, activity_id),
	{:ok, activity} <- insert(data, local),
	:ok <- maybe_federate(activity) do
	{:ok, activity}
	end
	end

	def unfollow(follower, followed, activity_id \\ nil, local \\ true) 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),
	:ok <- maybe_federate(activity) do
	{:ok, activity}
	end
	end

	def delete(%Object{data: %{"id" => id, "actor" => actor}} = object, local \\ true) do
	user = User.get_cached_by_ap_id(actor)

	data = %{
	"type" => "Delete",
	"actor" => actor,
	"object" => id,
	"to" => [user.follower_address, "https://www.w3.org/ns/activitystreams#Public"]
	}

	with Repo.delete(object),
	Repo.delete_all(Activity.all_non_create_by_object_ap_id_q(id)),
	{:ok, activity} <- insert(data, local),
	:ok <- maybe_federate(activity),
	{:ok, _actor} <- User.decrease_note_count(user) do
	{:ok, activity}
	end
	end

	def block(blocker, blocked, activity_id \\ nil, local \\ true) do
	- follow_activity = fetch_latest_follow(blocker, blocked)
	+ ap_config = Application.get_env(:pleroma, :activitypub)
	+ unfollow_blocked = Keyword.get(ap_config, :unfollow_blocked)
	+ outgoing_blocks = Keyword.get(ap_config, :outgoing_blocks)

	- if follow_activity do
	- unfollow(blocker, blocked, nil, local)
	+ with true <- unfollow_blocked do
	+ follow_activity = fetch_latest_follow(blocker, blocked)
	+
	+ if follow_activity do
	+ unfollow(blocker, blocked, nil, local)
	+ end
	end

	- with block_data <- make_block_data(blocker, blocked, activity_id),
	+ with true <- outgoing_blocks,
	+ block_data <- make_block_data(blocker, blocked, activity_id),
	{:ok, activity} <- insert(block_data, local),
	:ok <- maybe_federate(activity) do
	{:ok, activity}
	+ else
	+ _e -> {:ok, nil}
	end
	end

	def unblock(blocker, blocked, activity_id \\ nil, local \\ true) do
	with %Activity{} = block_activity <- fetch_latest_block(blocker, blocked),
	unblock_data <- make_unblock_data(blocker, blocked, block_activity, activity_id),
	{:ok, activity} <- insert(unblock_data, local),
	:ok <- maybe_federate(activity) do
	{:ok, activity}
	end
	end

	def fetch_activities_for_context(context, opts \\ %{}) do
	public = ["https://www.w3.org/ns/activitystreams#Public"]

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

	query = from(activity in Activity)

	query =
	query
	\|> restrict_blocked(opts)
	\|> restrict_recipients(recipients, opts["user"])

	query =
	from(
	activity in query,
	where:
	fragment(
	"?->>'type' = ? and ?->>'context' = ?",
	activity.data,
	"Create",
	activity.data,
	^context
	),
	order_by: [desc: :id]
	)

	Repo.all(query)
	end

	def fetch_public_activities(opts \\ %{}) do
	q = fetch_activities_query(["https://www.w3.org/ns/activitystreams#Public"], opts)

	q
	\|> restrict_unlisted()
	\|> Repo.all()
	\|> Enum.reverse()
	end

	@valid_visibilities ~w[direct unlisted public private]

	defp restrict_visibility(query, %{visibility: "direct"}) do
	public = "https://www.w3.org/ns/activitystreams#Public"

	from(
	activity in query,
	join: sender in User,
	on: sender.ap_id == activity.actor,
	# Are non-direct statuses with no to/cc possible?
	where:
	fragment(
	"not (? && ?)",
	[^public, sender.follower_address],
	activity.recipients
	)
	)
	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

	def fetch_user_activities(user, reading_user, params \\ %{}) do
	params =
	params
	\|> Map.put("type", ["Create", "Announce"])
	\|> Map.put("actor_id", user.ap_id)
	\|> Map.put("whole_db", true)

	recipients =
	if reading_user do
	["https://www.w3.org/ns/activitystreams#Public"] ++
	[reading_user.ap_id \| reading_user.following]
	else
	["https://www.w3.org/ns/activitystreams#Public"]
	end

	fetch_activities(recipients, params)
	\|> Enum.reverse()
	end

	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_tag(query, %{"tag" => tag}) do
	from(
	activity in query,
	where: fragment("? <@ (? #> '{\"object\",\"tag\"}')", ^tag, activity.data)
	)
	end

	defp restrict_tag(query, _), do: query

	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_limit(query, %{"limit" => limit}) do
	from(activity in query, limit: ^limit)
	end

	defp restrict_limit(query, _), do: query

	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_max(query, %{"max_id" => max_id}) do
	from(activity in query, where: activity.id < ^max_id)
	end

	defp restrict_max(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
	restrict_type(query, %{"type" => [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_favorited_by(query, %{"favorited_by" => ap_id}) do
	from(
	activity in query,
	where: fragment("? <@ (? #> '{\"object\",\"likes\"}')", ^ap_id, activity.data)
	)
	end

	defp restrict_favorited_by(query, _), do: query

	defp restrict_media(query, %{"only_media" => val}) when val == "true" or val == "1" do
	from(
	activity in query,
	where: fragment("not (? #> '{\"object\",\"attachment\"}' = ?)", activity.data, ^[])
	)
	end

	defp restrict_media(query, _), do: query

	defp restrict_replies(query, %{"exclude_replies" => val}) when val == "true" or val == "1" do
	from(
	activity in query,
	where: fragment("?->'object'->>'inReplyTo' is null", activity.data)
	)
	end

	defp restrict_replies(query, _), do: query

	# Only search through last 100_000 activities by default
	defp restrict_recent(query, %{"whole_db" => true}), do: query

	defp restrict_recent(query, _) do
	since = (Repo.aggregate(Activity, :max, :id) \|\| 0) - 100_000

	from(activity in query, where: activity.id > ^since)
	end

	defp restrict_blocked(query, %{"blocking_user" => %User{info: info}}) do
	blocks = info["blocks"] \|\| []
	domain_blocks = info["domain_blocks"] \|\| []

	from(
	activity in query,
	where: fragment("not (? = ANY(?))", activity.actor, ^blocks),
	where: fragment("not (?->'to' \\?\| ?)", activity.data, ^blocks),
	where: fragment("not (split_part(?, '/', 3) = ANY(?))", activity.actor, ^domain_blocks)
	)
	end

	defp restrict_blocked(query, _), do: query

	defp restrict_unlisted(query) do
	from(
	activity in query,
	where:
	fragment(
	"not (coalesce(?->'cc', '{}'::jsonb) \\?\| ?)",
	activity.data,
	^["https://www.w3.org/ns/activitystreams#Public"]
	)
	)
	end

	def fetch_activities_query(recipients, opts \\ %{}) do
	base_query =
	from(
	activity in Activity,
	limit: 20,
	order_by: [fragment("? desc nulls last", activity.id)]
	)

	base_query
	\|> restrict_recipients(recipients, opts["user"])
	\|> restrict_tag(opts)
	\|> restrict_since(opts)
	\|> restrict_local(opts)
	\|> restrict_limit(opts)
	\|> restrict_max(opts)
	\|> restrict_actor(opts)
	\|> restrict_type(opts)
	\|> restrict_favorited_by(opts)
	\|> restrict_recent(opts)
	\|> restrict_blocked(opts)
	\|> restrict_media(opts)
	\|> restrict_visibility(opts)
	\|> restrict_replies(opts)
	end

	def fetch_activities(recipients, opts \\ %{}) do
	fetch_activities_query(recipients, opts)
	\|> Repo.all()
	\|> Enum.reverse()
	end

	def upload(file) do
	data = Upload.store(file, Application.get_env(:pleroma, :instance)[:dedupe_media])
	Repo.insert(%Object{data: data})
	end

	def user_data_from_user_object(data) do
	avatar =
	data["icon"]["url"] &&
	%{
	"type" => "Image",
	"url" => [%{"href" => data["icon"]["url"]}]
	}

	banner =
	data["image"]["url"] &&
	%{
	"type" => "Image",
	"url" => [%{"href" => data["image"]["url"]}]
	}

	locked = data["manuallyApprovesFollowers"] \|\| false
	data = Transmogrifier.maybe_fix_user_object(data)

	user_data = %{
	ap_id: data["id"],
	info: %{
	"ap_enabled" => true,
	"source_data" => data,
	"banner" => banner,
	"locked" => locked
	},
	avatar: avatar,
	nickname: "#{data["preferredUsername"]}@#{URI.parse(data["id"]).host}",
	name: data["name"],
	follower_address: data["followers"],
	bio: data["summary"]
	}

	{:ok, user_data}
	end

	def fetch_and_prepare_user_from_ap_id(ap_id) do
	with {:ok, %{status_code: 200, body: body}} <-
	@httpoison.get(ap_id, Accept: "application/activity+json"),
	{:ok, data} <- Jason.decode(body) do
	user_data_from_user_object(data)
	else
	e -> Logger.error("Could not decode user at fetch #{ap_id}, #{inspect(e)}")
	end
	end

	def make_user_from_ap_id(ap_id) do
	if _user = User.get_by_ap_id(ap_id) do
	Transmogrifier.upgrade_user_from_ap_id(ap_id)
	else
	with {:ok, data} <- fetch_and_prepare_user_from_ap_id(ap_id) do
	User.insert_or_update_user(data)
	else
	e -> {:error, e}
	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

	@quarantined_instances Keyword.get(@instance, :quarantined_instances, [])

	def should_federate?(inbox, public) do
	if public do
	true
	else
	inbox_info = URI.parse(inbox)
	inbox_info.host not in @quarantined_instances
	end
	end

	def publish(actor, activity) do
	followers =
	if actor.follower_address in activity.recipients do
	{:ok, followers} = User.get_followers(actor)
	followers \|> Enum.filter(&(!&1.local))
	else
	[]
	end

	public = is_public?(activity)

	remote_inboxes =
	(Pleroma.Web.Salmon.remote_users(activity) ++ followers)
	\|> Enum.filter(fn user -> User.ap_enabled?(user) end)
	\|> Enum.map(fn %{info: %{"source_data" => data}} ->
	(data["endpoints"] && data["endpoints"]["sharedInbox"]) \|\| data["inbox"]
	end)
	\|> Enum.uniq()
	\|> Enum.filter(fn inbox -> should_federate?(inbox, public) end)

	{:ok, data} = Transmogrifier.prepare_outgoing(activity.data)
	json = Jason.encode!(data)

	Enum.each(remote_inboxes, fn inbox ->
	Federator.enqueue(:publish_single_ap, %{
	inbox: inbox,
	json: json,
	actor: actor,
	id: activity.data["id"]
	})
	end)
	end

	def publish_one(%{inbox: inbox, json: json, actor: actor, id: id}) do
	Logger.info("Federating #{id} to #{inbox}")
	host = URI.parse(inbox).host

	signature =
	Pleroma.Web.HTTPSignatures.sign(actor, %{host: host, "content-length": byte_size(json)})

	@httpoison.post(
	inbox,
	json,
	[{"Content-Type", "application/activity+json"}, {"signature", signature}],
	hackney: [pool: :default]
	)
	end

	# TODO:
	# This will create a Create activity, which we need internally at the moment.
	def fetch_object_from_id(id) do
	if object = Object.get_cached_by_ap_id(id) do
	{:ok, object}
	else
	Logger.info("Fetching #{id} via AP")

	with true <- String.starts_with?(id, "http"),
	{:ok, %{body: body, status_code: code}} when code in 200..299 <-
	@httpoison.get(
	id,
	[Accept: "application/activity+json"],
	follow_redirect: true,
	timeout: 10000,
	recv_timeout: 20000
	),
	{:ok, data} <- Jason.decode(body),
	nil <- Object.get_by_ap_id(data["id"]),
	params <- %{
	"type" => "Create",
	"to" => data["to"],
	"cc" => data["cc"],
	"actor" => data["attributedTo"],
	"object" => data
	},
	{:ok, activity} <- Transmogrifier.handle_incoming(params) do
	{:ok, Object.get_by_ap_id(activity.data["object"]["id"])}
	else
	object = %Object{} ->
	{:ok, object}

	_e ->
	Logger.info("Couldn't get object via AP, trying out OStatus fetching...")

	case OStatus.fetch_activity_from_url(id) do
	{:ok, [activity \| _]} -> {:ok, Object.get_by_ap_id(activity.data["object"]["id"])}
	e -> e
	end
	end
	end
	end

	def is_public?(activity) do
	"https://www.w3.org/ns/activitystreams#Public" in (activity.data["to"] ++
	(activity.data["cc"] \|\| []))
	end

	def visible_for_user?(activity, nil) do
	is_public?(activity)
	end

	def visible_for_user?(activity, user) do
	x = [user.ap_id \| user.following]
	y = activity.data["to"] ++ (activity.data["cc"] \|\| [])
	visible_for_user?(activity, nil) \|\| Enum.any?(x, &(&1 in y))
	end
	end

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