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	diff --git a/config/config.exs b/config/config.exs
	index e8aad855c..45034a775 100644
	--- a/config/config.exs
	+++ b/config/config.exs
	@@ -1,483 +1,488 @@
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	# .nC. ..... IMMMQ..,::::::,.,czX.
	# .ct: ....... .ZMMMI..,:::::::,,:76Y.
	# c2: ......,i..Y$M@t..:::::::,,..inZY
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	# .I9. ......:i::::...8M1..................C0z.
	# .z9; ......:i::::,.. .i:...................zWX.
	# vbv ......,i::::,,. ................. :AQY
	# c6Y. .,...,::::,,..:t0@@QY. ................ :8bi
	# :6S. ..,,...,:::,,,..EMMMMMMI. ............... .;bZ,
	# :6o, .,,,,..:::,,,..i#MMMMMM#v................. YW2.
	# .n8i ..,,,,,,,::,,,,.. tMMMMM@C:.................. .1Wn
	# 7Uc. .:::,,,,,::,,,,.. i1t;,..................... .UEi
	# 7C...::::::::::::,,,,.. .................... vSi.
	# ;1;...,,::::::,......... .................. Yz:
	# v97,......... .voC.
	# izAotX7777777777777777777777777777777777777777Y7n92:
	# .;CoIIIIIUAA666666699999ZZZZZZZZZZZZZZZZZZZZ6ov.
	#
	# !!! ATTENTION !!!
	# DO NOT EDIT THIS FILE! THIS FILE CONTAINS THE DEFAULT VALUES FOR THE CON-
	# FIGURATION! EDIT YOUR SECRET FILE (either prod.secret.exs, dev.secret.exs).
	#
	# 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,
	telemetry_event: [Pleroma.Repo.Instrumenter]

	config :pleroma, Pleroma.Captcha,
	enabled: false,
	seconds_valid: 60,
	method: Pleroma.Captcha.Kocaptcha

	config :pleroma, :hackney_pools,
	federation: [
	max_connections: 50,
	timeout: 150_000
	],
	media: [
	max_connections: 50,
	timeout: 150_000
	],
	upload: [
	max_connections: 25,
	timeout: 300_000
	]

	config :pleroma, Pleroma.Captcha.Kocaptcha, endpoint: "https://captcha.kotobank.ch"

	# Upload configuration
	config :pleroma, Pleroma.Upload,
	uploader: Pleroma.Uploaders.Local,
	filters: [Pleroma.Upload.Filter.Dedupe],
	link_name: true,
	proxy_remote: false,
	proxy_opts: [
	redirect_on_failure: false,
	max_body_length: 25 * 1_048_576,
	http: [
	follow_redirect: true,
	pool: :upload
	]
	]

	config :pleroma, Pleroma.Uploaders.Local, uploads: "uploads"

	config :pleroma, Pleroma.Uploaders.S3,
	bucket: nil,
	public_endpoint: "https://s3.amazonaws.com"

	config :pleroma, Pleroma.Uploaders.MDII,
	cgi: "https://mdii.sakura.ne.jp/mdii-post.cgi",
	files: "https://mdii.sakura.ne.jp"

	config :pleroma, :emoji,
	shortcode_globs: ["/emoji/custom/*/.png"],
	groups: [
	# Put groups that have higher priority than defaults here. Example in `docs/config/custom_emoji.md`
	Custom: ["/emoji/.png", "/emoji//.png"]
	],
	default_manifest: "https://git.pleroma.social/pleroma/emoji-index/raw/master/index.json"

	config :pleroma, :uri_schemes,
	valid_schemes: [
	"https",
	"http",
	"dat",
	"dweb",
	"gopher",
	"ipfs",
	"ipns",
	"irc",
	"ircs",
	"magnet",
	"mailto",
	"mumble",
	"ssb",
	"xmpp"
	]

	websocket_config = [
	path: "/websocket",
	serializer: [
	{Phoenix.Socket.V1.JSONSerializer, "~> 1.0.0"},
	{Phoenix.Socket.V2.JSONSerializer, "~> 2.0.0"}
	],
	timeout: 60_000,
	transport_log: false,
	compress: false
	]

	# Configures the endpoint
	config :pleroma, Pleroma.Web.Endpoint,
	instrumenters: [Pleroma.Web.Endpoint.Instrumenter],
	url: [host: "localhost"],
	http: [
	dispatch: [
	{:_,
	[
	{"/api/v1/streaming", Pleroma.Web.MastodonAPI.WebsocketHandler, []},
	{"/websocket", Phoenix.Endpoint.CowboyWebSocket,
	{Phoenix.Transports.WebSocket,
	{Pleroma.Web.Endpoint, Pleroma.Web.UserSocket, websocket_config}}},
	{:_, Phoenix.Endpoint.Cowboy2Handler, {Pleroma.Web.Endpoint, []}}
	]}
	]
	],
	protocol: "https",
	secret_key_base: "aK4Abxf29xU9TTDKre9coZPUgevcVCFQJe/5xP/7Lt4BEif6idBIbjupVbOrbKxl",
	signing_salt: "CqaoopA2",
	render_errors: [view: Pleroma.Web.ErrorView, accepts: ~w(json)],
	pubsub: [name: Pleroma.PubSub, adapter: Phoenix.PubSub.PG2],
	secure_cookie_flag: true,
	extra_cookie_attrs: [
	"SameSite=Lax"
	]

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

	config :logger, :ex_syslogger,
	level: :debug,
	ident: "Pleroma",
	format: "$metadata[$level] $message",
	metadata: [:request_id]

	config :quack,
	level: :warn,
	meta: [:all],
	webhook_url: "https://hooks.slack.com/services/YOUR-KEY-HERE"

	config :mime, :types, %{
	"application/xml" => ["xml"],
	"application/xrd+xml" => ["xrd+xml"],
	"application/jrd+json" => ["jrd+json"],
	"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
	config :tesla, adapter: Tesla.Adapter.Hackney

	# Configures http settings, upstream proxy etc.
	config :pleroma, :http,
	proxy_url: nil,
	adapter: [
	ssl_options: [
	# We don't support TLS v1.3 yet
	versions: [:tlsv1, :"tlsv1.1", :"tlsv1.2"]
	]
	]

	config :pleroma, :instance,
	name: "Pleroma",
	email: "example@example.com",
	notify_email: "noreply@example.com",
	description: "A Pleroma instance, an alternative fediverse server",
	limit: 5_000,
	remote_limit: 100_000,
	upload_limit: 16_000_000,
	avatar_upload_limit: 2_000_000,
	background_upload_limit: 4_000_000,
	banner_upload_limit: 4_000_000,
	registrations_open: true,
	federating: true,
	federation_reachability_timeout_days: 7,
	+ federation_publisher_modules: [
	+ Pleroma.Web.ActivityPub.Publisher,
	+ Pleroma.Web.Websub,
	+ Pleroma.Web.Salmon
	+ ],
	allow_relay: true,
	rewrite_policy: Pleroma.Web.ActivityPub.MRF.NoOpPolicy,
	public: true,
	quarantined_instances: [],
	managed_config: true,
	static_dir: "instance/static/",
	allowed_post_formats: [
	"text/plain",
	"text/html",
	"text/markdown",
	"text/bbcode"
	],
	mrf_transparency: true,
	autofollowed_nicknames: [],
	max_pinned_statuses: 1,
	no_attachment_links: false,
	welcome_user_nickname: nil,
	welcome_message: nil,
	max_report_comment_size: 1000,
	safe_dm_mentions: false,
	healthcheck: false

	config :pleroma, :app_account_creation, enabled: false, max_requests: 5, interval: 1800

	config :pleroma, :markup,
	# XXX - unfortunately, inline images must be enabled by default right now, because
	# of custom emoji. Issue #275 discusses defanging that somehow.
	allow_inline_images: true,
	allow_headings: false,
	allow_tables: false,
	allow_fonts: false,
	scrub_policy: [
	Pleroma.HTML.Transform.MediaProxy,
	Pleroma.HTML.Scrubber.Default
	]

	# Deprecated, will be gone in 1.0
	config :pleroma, :fe,
	theme: "pleroma-dark",
	logo: "/static/logo.png",
	logo_mask: true,
	logo_margin: "0.1em",
	background: "/static/aurora_borealis.jpg",
	redirect_root_no_login: "/main/all",
	redirect_root_login: "/main/friends",
	show_instance_panel: true,
	scope_options_enabled: false,
	formatting_options_enabled: false,
	collapse_message_with_subject: false,
	hide_post_stats: false,
	hide_user_stats: false,
	scope_copy: true,
	subject_line_behavior: "email",
	always_show_subject_input: true

	config :pleroma, :frontend_configurations,
	pleroma_fe: %{
	theme: "pleroma-dark",
	logo: "/static/logo.png",
	background: "/images/city.jpg",
	redirectRootNoLogin: "/main/all",
	redirectRootLogin: "/main/friends",
	showInstanceSpecificPanel: true,
	scopeOptionsEnabled: false,
	formattingOptionsEnabled: false,
	collapseMessageWithSubject: false,
	hidePostStats: false,
	hideUserStats: false,
	scopeCopy: true,
	subjectLineBehavior: "email",
	alwaysShowSubjectInput: true
	},
	masto_fe: %{
	showInstanceSpecificPanel: true
	}

	config :pleroma, :activitypub,
	accept_blocks: true,
	unfollow_blocked: true,
	outgoing_blocks: true,
	follow_handshake_timeout: 500

	config :pleroma, :user, deny_follow_blocked: true

	config :pleroma, :mrf_normalize_markup, scrub_policy: Pleroma.HTML.Scrubber.Default

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

	config :pleroma, :mrf_hellthread,
	delist_threshold: 10,
	reject_threshold: 20

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

	config :pleroma, :mrf_keyword,
	reject: [],
	federated_timeline_removal: [],
	replace: []

	config :pleroma, :rich_media, enabled: true

	config :pleroma, :media_proxy,
	enabled: false,
	proxy_opts: [
	redirect_on_failure: false,
	max_body_length: 25 * 1_048_576,
	http: [
	follow_redirect: true,
	pool: :media
	]
	],
	whitelist: []

	config :pleroma, :chat, enabled: true

	config :phoenix, :format_encoders, json: Jason

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

	config :pleroma, Pleroma.Web.Metadata,
	providers: [Pleroma.Web.Metadata.Providers.RelMe],
	unfurl_nsfw: false

	config :pleroma, :suggestions,
	enabled: false,
	third_party_engine:
	"http://vinayaka.distsn.org/cgi-bin/vinayaka-user-match-suggestions-api.cgi?{{host}}+{{user}}",
	timeout: 300_000,
	limit: 23,
	web: "https://vinayaka.distsn.org/?{{host}}+{{user}}"

	config :pleroma, :http_security,
	enabled: true,
	sts: false,
	sts_max_age: 31_536_000,
	ct_max_age: 2_592_000,
	referrer_policy: "same-origin"

	config :cors_plug,
	max_age: 86_400,
	methods: ["POST", "PUT", "DELETE", "GET", "PATCH", "OPTIONS"],
	expose: [
	"Link",
	"X-RateLimit-Reset",
	"X-RateLimit-Limit",
	"X-RateLimit-Remaining",
	"X-Request-Id",
	"Idempotency-Key"
	],
	credentials: true,
	headers: ["Authorization", "Content-Type", "Idempotency-Key"]

	config :pleroma, Pleroma.User,
	restricted_nicknames: [
	".well-known",
	"~",
	"about",
	"activities",
	"api",
	"auth",
	"dev",
	"friend-requests",
	"inbox",
	"internal",
	"main",
	"media",
	"nodeinfo",
	"notice",
	"oauth",
	"objects",
	"ostatus_subscribe",
	"pleroma",
	"proxy",
	"push",
	"registration",
	"relay",
	"settings",
	"status",
	"tag",
	"user-search",
	"users",
	"web"
	]

	config :pleroma, Pleroma.Web.Federator.RetryQueue,
	enabled: false,
	max_jobs: 20,
	initial_timeout: 30,
	max_retries: 5

	config :pleroma_job_queue, :queues,
	federator_incoming: 50,
	federator_outgoing: 50,
	web_push: 50,
	mailer: 10,
	transmogrifier: 20,
	scheduled_activities: 10,
	background: 5

	config :pleroma, :fetch_initial_posts,
	enabled: false,
	pages: 5

	config :auto_linker,
	opts: [
	scheme: true,
	extra: true,
	class: false,
	strip_prefix: false,
	new_window: false,
	rel: false
	]

	config :pleroma, :ldap,
	enabled: System.get_env("LDAP_ENABLED") == "true",
	host: System.get_env("LDAP_HOST") \|\| "localhost",
	port: String.to_integer(System.get_env("LDAP_PORT") \|\| "389"),
	ssl: System.get_env("LDAP_SSL") == "true",
	sslopts: [],
	tls: System.get_env("LDAP_TLS") == "true",
	tlsopts: [],
	base: System.get_env("LDAP_BASE") \|\| "dc=example,dc=com",
	uid: System.get_env("LDAP_UID") \|\| "cn"

	config :esshd,
	enabled: false

	oauth_consumer_strategies = String.split(System.get_env("OAUTH_CONSUMER_STRATEGIES") \|\| "")

	ueberauth_providers =
	for strategy <- oauth_consumer_strategies do
	strategy_module_name = "Elixir.Ueberauth.Strategy.#{String.capitalize(strategy)}"
	strategy_module = String.to_atom(strategy_module_name)
	{String.to_atom(strategy), {strategy_module, [callback_params: ["state"]]}}
	end

	config :ueberauth,
	Ueberauth,
	base_path: "/oauth",
	providers: ueberauth_providers

	config :pleroma, :auth, oauth_consumer_strategies: oauth_consumer_strategies

	config :pleroma, Pleroma.Emails.Mailer, adapter: Swoosh.Adapters.Sendmail

	config :prometheus, Pleroma.Web.Endpoint.MetricsExporter, path: "/api/pleroma/app_metrics"

	config :pleroma, Pleroma.ScheduledActivity,
	daily_user_limit: 25,
	total_user_limit: 300,
	enabled: true

	config :pleroma, :oauth2,
	token_expires_in: 600,
	issue_new_refresh_token: true

	# 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/web/activity_pub/activity_pub.ex b/lib/pleroma/web/activity_pub/activity_pub.ex
	index 8f8c23a9b..11777c220 100644
	--- a/lib/pleroma/web/activity_pub/activity_pub.ex
	+++ b/lib/pleroma/web/activity_pub/activity_pub.ex
	@@ -1,1064 +1,977 @@
	# Pleroma: A lightweight social networking server
	# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
	# SPDX-License-Identifier: AGPL-3.0-only

	defmodule Pleroma.Web.ActivityPub.ActivityPub do
	alias Pleroma.Activity
	alias Pleroma.Conversation
	- alias Pleroma.Instances
	alias Pleroma.Notification
	alias Pleroma.Object
	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.Federator
	alias Pleroma.Web.WebFinger

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

	require Logger

	- @httpoison Application.get_env(:pleroma, :httpoison)
	-
	# For Announce activities, we filter the recipients based on following status for any actors
	# that match actual users. See issue #164 for more information about why this is necessary.
	defp get_recipients(%{"type" => "Announce"} = data) do
	to = data["to"] \|\| []
	cc = data["cc"] \|\| []
	actor = User.get_cached_by_ap_id(data["actor"])

	recipients =
	(to ++ cc)
	\|> Enum.filter(fn recipient ->
	case User.get_cached_by_ap_id(recipient) do
	nil ->
	true

	user ->
	User.following?(user, actor)
	end
	end)

	{recipients, to, cc}
	end

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

	defp get_recipients(data) do
	to = data["to"] \|\| []
	cc = data["cc"] \|\| []
	recipients = to ++ cc
	{recipients, to, cc}
	end

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

	defp check_remote_limit(%{"object" => %{"content" => content}}) when not is_nil(content) do
	limit = Pleroma.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

	def 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

	def increase_replies_count_if_reply(_create_data), do: :noop

	def decrease_replies_count_if_reply(%Object{
	data: %{"inReplyTo" => reply_ap_id} = object
	}) do
	if is_public?(object) do
	Object.decrease_replies_count(reply_ap_id)
	end
	end

	def decrease_replies_count_if_reply(_object), do: :noop

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

	# Splice in the child object if we have one.
	activity =
	if !is_nil(object) do
	Map.put(activity, :object, object)
	else
	activity
	end

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

	Notification.create_notifications(activity)

	participations =
	activity
	\|> Conversation.create_or_bump_for()
	\|> get_participations()

	stream_out(activity)
	stream_out_participations(participations)
	{:ok, activity}
	else
	%Activity{} = activity ->
	{:ok, activity}

	{: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}

	error ->
	{:error, error}
	end
	end

	defp get_participations({:ok, %{participations: participations}}), do: participations
	defp get_participations(_), do: []

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

	Enum.each(participations, fn participation ->
	Pleroma.Web.Streamer.stream("participation", participation)
	end)
	end

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

	if activity.data["type"] in ["Create", "Announce", "Delete"] 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["type"] in ["Create"] do
	object = Object.normalize(activity)

	object.data
	\|> Map.get("tag", [])
	\|> Enum.filter(fn tag -> is_bitstring(tag) end)
	\|> Enum.each(fn tag -> Pleroma.Web.Streamer.stream("hashtag:" <> tag, activity) end)

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

	if activity.local do
	Pleroma.Web.Streamer.stream("public:local:media", activity)
	end
	end
	end
	else
	# TODO: Write test, replace with visibility test
	if !Enum.member?(activity.data["cc"] \|\| [], public) &&
	!Enum.member?(
	activity.data["to"],
	User.get_cached_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, fake \\ false) 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, fake),
	{:fake, false, activity} <- {:fake, fake, activity},
	_ <- increase_replies_count_if_reply(create_data),
	# Changing note count prior to enqueuing federation task in order to avoid
	# race conditions on updating user.info
	{:ok, _actor} <- increase_note_count_if_public(actor, activity),
	:ok <- maybe_federate(activity) do
	{:ok, activity}
	else
	{:fake, true, activity} ->
	{: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.ap_id, "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.ap_id, "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,
	public \\ true
	) do
	with true <- is_public?(object),
	announce_data <- make_announce_data(user, object, activity_id, public),
	{: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)
	to = (object.data["to"] \|\| []) ++ (object.data["cc"] \|\| [])

	with {:ok, object, activity} <- Object.delete(object),
	data <- %{
	"type" => "Delete",
	"actor" => actor,
	"object" => id,
	"to" => to,
	"deleted_activity_id" => activity && activity.id
	},
	{:ok, activity} <- insert(data, local),
	_ <- decrease_replies_count_if_reply(object),
	# Changing note count prior to enqueuing federation task in order to avoid
	# race conditions on updating user.info
	{:ok, _actor} <- decrease_note_count_if_public(user, object),
	:ok <- maybe_federate(activity) do
	{:ok, activity}
	end
	end

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

	with true <- unfollow_blocked do
	follow_activity = fetch_latest_follow(blocker, blocked)

	if follow_activity do
	unfollow(blocker, blocked, nil, local)
	end
	end

	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 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] \|\| %{}

	params = %{
	actor: actor,
	context: context,
	account: account,
	statuses: statuses,
	content: content
	}

	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 <- maybe_federate(activity) do
	Enum.each(User.all_superusers(), fn superuser ->
	superuser
	\|> Pleroma.Emails.AdminEmail.report(actor, account, statuses, content)
	\|> Pleroma.Emails.Mailer.deliver_async()
	end)

	{:ok, activity}
	end
	end

	defp fetch_activities_for_context_query(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

	from(activity in Activity)
	\|> restrict_blocked(opts)
	\|> restrict_recipients(recipients, opts["user"])
	\|> where(
	[activity],
	fragment(
	"?->>'type' = ? and ?->>'context' = ?",
	activity.data,
	"Create",
	activity.data,
	^context
	)
	)
	\|> 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)
	\|> Activity.with_preloaded_object()
	\|> Repo.all()
	end

	@spec fetch_latest_activity_id_for_context(String.t(), keyword() \| map()) ::
	Pleroma.FlakeId.t() \| nil
	def fetch_latest_activity_id_for_context(context, opts \\ %{}) do
	context
	\|> fetch_activities_for_context_query(opts)
	\|> limit(1)
	\|> select([a], a.id)
	\|> Repo.one()
	end

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

	q
	\|> restrict_unlisted()
	\|> Pagination.fetch_paginated(opts)
	\|> Enum.reverse()
	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
	query =
	from(
	a in query,
	where:
	fragment(
	"activity_visibility(?, ?, ?) = ANY (?)",
	a.actor,
	a.recipients,
	a.data,
	^visibility
	)
	)

	Ecto.Adapters.SQL.to_sql(:all, Repo, query)

	query
	else
	Logger.error("Could not restrict visibility to #{visibility}")
	end
	end

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

	Ecto.Adapters.SQL.to_sql(:all, Repo, query)

	query
	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)
	\|> Map.put("pinned_activity_ids", user.info.pinned_activities)

	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" => ""}), 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_tag_reject(_query, %{"tag_reject" => _tag_reject, "skip_preload" => true}) do
	raise "Can't use the child object without preloading!"
	end

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

	defp restrict_tag_reject(query, _), do: query

	defp restrict_tag_all(_query, %{"tag_all" => _tag_all, "skip_preload" => true}) do
	raise "Can't use the child object without preloading!"
	end

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

	defp restrict_tag_all(query, _), do: query

	defp restrict_tag(_query, %{"tag" => _tag, "skip_preload" => true}) do
	raise "Can't use the child object without preloading!"
	end

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

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

	defp restrict_tag(query, _), do: query

	defp restrict_to_cc(query, recipients_to, recipients_cc) do
	from(
	activity in query,
	where:
	fragment(
	"(?->'to' \\?\| ?) or (?->'cc' \\?\| ?)",
	activity.data,
	^recipients_to,
	activity.data,
	^recipients_cc
	)
	)
	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_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_favorited_by(query, %{"favorited_by" => ap_id}) do
	from(
	activity in query,
	where: fragment(~s(? <@ (? #> '{"object","likes"}'\)), ^ap_id, activity.data)
	)
	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" => val}) when val == "true" or val == "1" do
	from(
	[_activity, object] in query,
	where: fragment("not (?)->'attachment' = (?)", object.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

	defp restrict_reblogs(query, %{"exclude_reblogs" => val}) when val == "true" or val == "1" do
	from(activity in query, where: fragment("?->>'type' != 'Announce'", activity.data))
	end

	defp restrict_reblogs(query, _), do: query

	defp restrict_muted(query, %{"with_muted" => val}) when val in [true, "true", "1"], do: query

	defp restrict_muted(query, %{"muting_user" => %User{info: info}}) do
	mutes = info.mutes

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

	defp restrict_muted(query, _), do: query

	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 (? && ?)", activity.recipients, ^blocks),
	where:
	fragment(
	"not (?->>'type' = 'Announce' and ?->'to' \\?\| ?)",
	activity.data,
	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

	defp restrict_pinned(query, %{"pinned" => "true", "pinned_activity_ids" => ids}) do
	from(activity in query, where: activity.id in ^ids)
	end

	defp restrict_pinned(query, _), do: query

	defp restrict_muted_reblogs(query, %{"muting_user" => %User{info: info}}) do
	muted_reblogs = info.muted_reblogs \|\| []

	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 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_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

	def fetch_activities_query(recipients, opts \\ %{}) do
	base_query = from(activity in Activity)

	base_query
	\|> maybe_preload_objects(opts)
	\|> maybe_preload_bookmarks(opts)
	\|> maybe_order(opts)
	\|> restrict_recipients(recipients, opts["user"])
	\|> restrict_tag(opts)
	\|> restrict_tag_reject(opts)
	\|> restrict_tag_all(opts)
	\|> restrict_since(opts)
	\|> restrict_local(opts)
	\|> restrict_actor(opts)
	\|> restrict_type(opts)
	\|> restrict_favorited_by(opts)
	\|> restrict_blocked(opts)
	\|> restrict_muted(opts)
	\|> restrict_media(opts)
	\|> restrict_visibility(opts)
	\|> restrict_replies(opts)
	\|> restrict_reblogs(opts)
	\|> restrict_pinned(opts)
	\|> restrict_muted_reblogs(opts)
	end

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

	def fetch_activities_bounded(recipients_to, recipients_cc, opts \\ %{}) do
	fetch_activities_query([], opts)
	\|> restrict_to_cc(recipients_to, recipients_cc)
	\|> Pagination.fetch_paginated(opts)
	\|> Enum.reverse()
	end

	def upload(file, opts \\ []) do
	with {:ok, data} <- Upload.store(file, opts) do
	obj_data =
	if opts[:actor] do
	Map.put(data, "actor", opts[:actor])
	else
	data
	end

	Repo.insert(%Object{data: obj_data})
	end
	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,
	name: data["name"],
	follower_address: data["followers"],
	bio: data["summary"]
	}

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

	{:ok, user_data}
	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) 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_cached_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

	- def should_federate?(inbox, public) do
	- if public do
	- true
	- else
	- inbox_info = URI.parse(inbox)
	- !Enum.member?(Pleroma.Config.get([:instance, :quarantined_instances], []), inbox_info.host)
	- end
	- end
	-
	- def publish(actor, activity) do
	- remote_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)
	-
	- {:ok, data} = Transmogrifier.prepare_outgoing(activity.data)
	- json = Jason.encode!(data)
	-
	- (Pleroma.Web.Salmon.remote_users(activity) ++ remote_followers)
	- \|> Enum.filter(fn user -> User.ap_enabled?(user) end)
	- \|> Enum.map(fn %{info: %{source_data: data}} ->
	- (is_map(data["endpoints"]) && Map.get(data["endpoints"], "sharedInbox")) \|\| data["inbox"]
	- end)
	- \|> Enum.uniq()
	- \|> Enum.filter(fn inbox -> should_federate?(inbox, public) end)
	- \|> Instances.filter_reachable()
	- \|> Enum.each(fn {inbox, unreachable_since} ->
	- Federator.publish_single_ap(%{
	- inbox: inbox,
	- json: json,
	- actor: actor,
	- id: activity.data["id"],
	- unreachable_since: unreachable_since
	- })
	- end)
	- end
	-
	- def publish_one(%{inbox: inbox, json: json, actor: actor, id: id} = params) do
	- Logger.info("Federating #{id} to #{inbox}")
	- host = URI.parse(inbox).host
	-
	- digest = "SHA-256=" <> (:crypto.hash(:sha256, json) \|> Base.encode64())
	-
	- date =
	- NaiveDateTime.utc_now()
	- \|> Timex.format!("{WDshort}, {0D} {Mshort} {YYYY} {h24}:{m}:{s} GMT")
	-
	- signature =
	- Pleroma.Web.HTTPSignatures.sign(actor, %{
	- host: host,
	- "content-length": byte_size(json),
	- digest: digest,
	- date: date
	- })
	-
	- with {:ok, %{status: code}} when code in 200..299 <-
	- result =
	- @httpoison.post(
	- inbox,
	- json,
	- [
	- {"Content-Type", "application/activity+json"},
	- {"Date", date},
	- {"signature", signature},
	- {"digest", digest}
	- ]
	- ) do
	- if !Map.has_key?(params, :unreachable_since) \|\| params[:unreachable_since],
	- do: Instances.set_reachable(inbox)
	-
	- result
	- else
	- {_post_result, response} ->
	- unless params[:unreachable_since], do: Instances.set_unreachable(inbox)
	- {:error, response}
	- end
	- end
	-
	# filter out broken threads
	def 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

	# do post-processing on a timeline
	def contain_timeline(timeline, user) do
	timeline
	\|> Enum.filter(fn activity ->
	contain_activity(activity, user)
	end)
	end
	end
	diff --git a/lib/pleroma/web/activity_pub/publisher.ex b/lib/pleroma/web/activity_pub/publisher.ex
	new file mode 100644
	index 000000000..8e3af0a81
	--- /dev/null
	+++ b/lib/pleroma/web/activity_pub/publisher.ex
	@@ -0,0 +1,152 @@
	+# Pleroma: A lightweight social networking server
	+# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
	+# SPDX-License-Identifier: AGPL-3.0-only
	+
	+defmodule Pleroma.Web.ActivityPub.Publisher do
	+ alias Pleroma.Activity
	+ alias Pleroma.Config
	+ alias Pleroma.Instances
	+ alias Pleroma.User
	+ alias Pleroma.Web.ActivityPub.Relay
	+ alias Pleroma.Web.ActivityPub.Transmogrifier
	+
	+ import Pleroma.Web.ActivityPub.Visibility
	+
	+ @behaviour Pleroma.Web.Federator.Publisher
	+
	+ require Logger
	+
	+ @httpoison Application.get_env(:pleroma, :httpoison)
	+
	+ @moduledoc """
	+ ActivityPub outgoing federation module.
	+ """
	+
	+ @doc """
	+ Determine if an activity can be represented by running it through Transmogrifier.
	+ """
	+ def is_representable?(%Activity{} = activity) do
	+ with {:ok, _data} <- Transmogrifier.prepare_outgoing(activity.data) do
	+ true
	+ else
	+ _e ->
	+ false
	+ end
	+ end
	+
	+ @doc """
	+ Publish a single message to a peer. Takes a struct with the following
	+ parameters set:
	+
	+ * `inbox`: the inbox to publish to
	+ * `json`: the JSON message body representing the ActivityPub message
	+ * `actor`: the actor which is signing the message
	+ * `id`: the ActivityStreams URI of the message
	+ """
	+ def publish_one(%{inbox: inbox, json: json, actor: %User{} = actor, id: id} = params) do
	+ Logger.info("Federating #{id} to #{inbox}")
	+ host = URI.parse(inbox).host
	+
	+ digest = "SHA-256=" <> (:crypto.hash(:sha256, json) \|> Base.encode64())
	+
	+ date =
	+ NaiveDateTime.utc_now()
	+ \|> Timex.format!("{WDshort}, {0D} {Mshort} {YYYY} {h24}:{m}:{s} GMT")
	+
	+ signature =
	+ Pleroma.Web.HTTPSignatures.sign(actor, %{
	+ host: host,
	+ "content-length": byte_size(json),
	+ digest: digest,
	+ date: date
	+ })
	+
	+ with {:ok, %{status: code}} when code in 200..299 <-
	+ result =
	+ @httpoison.post(
	+ inbox,
	+ json,
	+ [
	+ {"Content-Type", "application/activity+json"},
	+ {"Date", date},
	+ {"signature", signature},
	+ {"digest", digest}
	+ ]
	+ ) do
	+ if !Map.has_key?(params, :unreachable_since) \|\| params[:unreachable_since],
	+ do: Instances.set_reachable(inbox)
	+
	+ result
	+ else
	+ {_post_result, response} ->
	+ unless params[:unreachable_since], do: Instances.set_unreachable(inbox)
	+ {:error, response}
	+ end
	+ end
	+
	+ defp should_federate?(inbox, public) do
	+ if public do
	+ true
	+ else
	+ inbox_info = URI.parse(inbox)
	+ !Enum.member?(Pleroma.Config.get([:instance, :quarantined_instances], []), inbox_info.host)
	+ end
	+ end
	+
	+ @doc """
	+ Publishes an activity to all relevant peers.
	+ """
	+ def publish(%User{} = actor, %Activity{} = activity) do
	+ remote_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)
	+
	+ if public && Config.get([:instance, :allow_relay]) do
	+ Logger.info(fn -> "Relaying #{activity.data["id"]} out" end)
	+ Relay.publish(activity)
	+ end
	+
	+ {:ok, data} = Transmogrifier.prepare_outgoing(activity.data)
	+ json = Jason.encode!(data)
	+
	+ (Pleroma.Web.Salmon.remote_users(activity) ++ remote_followers)
	+ \|> Enum.filter(fn user -> User.ap_enabled?(user) end)
	+ \|> Enum.map(fn %{info: %{source_data: data}} ->
	+ (is_map(data["endpoints"]) && Map.get(data["endpoints"], "sharedInbox")) \|\| data["inbox"]
	+ end)
	+ \|> Enum.uniq()
	+ \|> Enum.filter(fn inbox -> should_federate?(inbox, public) end)
	+ \|> Instances.filter_reachable()
	+ \|> Enum.each(fn {inbox, unreachable_since} ->
	+ Pleroma.Web.Federator.Publisher.enqueue_one(
	+ __MODULE__,
	+ %{
	+ inbox: inbox,
	+ json: json,
	+ actor: actor,
	+ id: activity.data["id"],
	+ unreachable_since: unreachable_since
	+ }
	+ )
	+ end)
	+ end
	+
	+ def gather_webfinger_links(%User{} = user) do
	+ [
	+ %{"rel" => "self", "type" => "application/activity+json", "href" => user.ap_id},
	+ %{
	+ "rel" => "self",
	+ "type" => "application/ld+json; profile=\"https://www.w3.org/ns/activitystreams\"",
	+ "href" => user.ap_id
	+ }
	+ ]
	+ end
	+
	+ def gather_nodeinfo_protocol_names, do: ["activitypub"]
	+end
	diff --git a/lib/pleroma/web/federator/federator.ex b/lib/pleroma/web/federator/federator.ex
	index 29e178ba9..8621eda95 100644
	--- a/lib/pleroma/web/federator/federator.ex
	+++ b/lib/pleroma/web/federator/federator.ex
	@@ -1,197 +1,152 @@
	# Pleroma: A lightweight social networking server
	# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
	# SPDX-License-Identifier: AGPL-3.0-only

	defmodule Pleroma.Web.Federator do
	alias Pleroma.Activity
	alias Pleroma.Object.Containment
	alias Pleroma.User
	alias Pleroma.Web.ActivityPub.ActivityPub
	- alias Pleroma.Web.ActivityPub.Relay
	alias Pleroma.Web.ActivityPub.Transmogrifier
	alias Pleroma.Web.ActivityPub.Utils
	- alias Pleroma.Web.ActivityPub.Visibility
	+ alias Pleroma.Web.Federator.Publisher
	alias Pleroma.Web.Federator.RetryQueue
	- alias Pleroma.Web.OStatus
	- alias Pleroma.Web.Salmon
	alias Pleroma.Web.WebFinger
	alias Pleroma.Web.Websub

	require Logger

	@websub Application.get_env(:pleroma, :websub)
	@ostatus Application.get_env(:pleroma, :ostatus)

	def init do
	# 1 minute
	Process.sleep(1000 * 60)
	refresh_subscriptions()
	end

	# Client API

	def incoming_doc(doc) do
	PleromaJobQueue.enqueue(:federator_incoming, __MODULE__, [:incoming_doc, doc])
	end

	def incoming_ap_doc(params) do
	PleromaJobQueue.enqueue(:federator_incoming, __MODULE__, [:incoming_ap_doc, params])
	end

	def publish(activity, priority \\ 1) do
	PleromaJobQueue.enqueue(:federator_outgoing, __MODULE__, [:publish, activity], priority)
	end

	- def publish_single_ap(params) do
	- PleromaJobQueue.enqueue(:federator_outgoing, __MODULE__, [:publish_single_ap, params])
	- end
	-
	- def publish_single_websub(websub) do
	- PleromaJobQueue.enqueue(:federator_outgoing, __MODULE__, [:publish_single_websub, websub])
	- end
	-
	def verify_websub(websub) do
	PleromaJobQueue.enqueue(:federator_outgoing, __MODULE__, [:verify_websub, websub])
	end

	def request_subscription(sub) do
	PleromaJobQueue.enqueue(:federator_outgoing, __MODULE__, [:request_subscription, sub])
	end

	def refresh_subscriptions do
	PleromaJobQueue.enqueue(:federator_outgoing, __MODULE__, [:refresh_subscriptions])
	end

	- def publish_single_salmon(params) do
	- PleromaJobQueue.enqueue(:federator_outgoing, __MODULE__, [:publish_single_salmon, params])
	- end
	-
	# Job Worker Callbacks

	def perform(:refresh_subscriptions) do
	Logger.debug("Federator running refresh subscriptions")
	Websub.refresh_subscriptions()

	spawn(fn ->
	# 6 hours
	Process.sleep(1000 * 60 * 60 * 6)
	refresh_subscriptions()
	end)
	end

	def perform(:request_subscription, websub) do
	Logger.debug("Refreshing #{websub.topic}")

	with {:ok, websub} <- Websub.request_subscription(websub) do
	Logger.debug("Successfully refreshed #{websub.topic}")
	else
	_e -> Logger.debug("Couldn't refresh #{websub.topic}")
	end
	end

	def perform(:publish, activity) do
	Logger.debug(fn -> "Running publish for #{activity.data["id"]}" end)

	with actor when not is_nil(actor) <- User.get_cached_by_ap_id(activity.data["actor"]) do
	{:ok, actor} = WebFinger.ensure_keys_present(actor)

	- if Visibility.is_public?(activity) do
	- if OStatus.is_representable?(activity) do
	- Logger.info(fn -> "Sending #{activity.data["id"]} out via WebSub" end)
	- Websub.publish(Pleroma.Web.OStatus.feed_path(actor), actor, activity)
	-
	- Logger.info(fn -> "Sending #{activity.data["id"]} out via Salmon" end)
	- Pleroma.Web.Salmon.publish(actor, activity)
	- end
	-
	- if Keyword.get(Application.get_env(:pleroma, :instance), :allow_relay) do
	- Logger.info(fn -> "Relaying #{activity.data["id"]} out" end)
	- Relay.publish(activity)
	- end
	- end
	-
	- Logger.info(fn -> "Sending #{activity.data["id"]} out via AP" end)
	- Pleroma.Web.ActivityPub.ActivityPub.publish(actor, activity)
	+ Publisher.publish(actor, activity)
	end
	end

	def perform(:verify_websub, websub) do
	Logger.debug(fn ->
	"Running WebSub verification for #{websub.id} (#{websub.topic}, #{websub.callback})"
	end)

	@websub.verify(websub)
	end

	def perform(:incoming_doc, doc) do
	Logger.info("Got document, trying to parse")
	@ostatus.handle_incoming(doc)
	end

	def perform(:incoming_ap_doc, params) do
	Logger.info("Handling incoming AP activity")

	params = Utils.normalize_params(params)

	# NOTE: we use the actor ID to do the containment, this is fine because an
	# actor shouldn't be acting on objects outside their own AP server.
	with {:ok, _user} <- ap_enabled_actor(params["actor"]),
	nil <- Activity.normalize(params["id"]),
	:ok <- Containment.contain_origin_from_id(params["actor"], params),
	{:ok, activity} <- Transmogrifier.handle_incoming(params) do
	{:ok, activity}
	else
	%Activity{} ->
	Logger.info("Already had #{params["id"]}")
	:error

	_e ->
	# Just drop those for now
	Logger.info("Unhandled activity")
	Logger.info(Poison.encode!(params, pretty: 2))
	:error
	end
	end

	- def perform(:publish_single_salmon, params) do
	- Salmon.send_to_user(params)
	- end
	-
	- def perform(:publish_single_ap, params) do
	- case ActivityPub.publish_one(params) do
	- {:ok, _} ->
	- :ok
	-
	- {:error, _} ->
	- RetryQueue.enqueue(params, ActivityPub)
	- end
	- end
	-
	def perform(
	:publish_single_websub,
	%{xml: _xml, topic: _topic, callback: _callback, secret: _secret} = params
	) do
	case Websub.publish_one(params) do
	{:ok, _} ->
	:ok

	{:error, _} ->
	RetryQueue.enqueue(params, Websub)
	end
	end

	def perform(type, _) do
	Logger.debug(fn -> "Unknown task: #{type}" end)
	{:error, "Don't know what to do with this"}
	end

	def ap_enabled_actor(id) do
	user = User.get_cached_by_ap_id(id)

	if User.ap_enabled?(user) do
	{:ok, user}
	else
	ActivityPub.make_user_from_ap_id(id)
	end
	end
	end
	diff --git a/lib/pleroma/web/federator/publisher.ex b/lib/pleroma/web/federator/publisher.ex
	new file mode 100644
	index 000000000..916bcdcba
	--- /dev/null
	+++ b/lib/pleroma/web/federator/publisher.ex
	@@ -0,0 +1,95 @@
	+# Pleroma: A lightweight social networking server
	+# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
	+# SPDX-License-Identifier: AGPL-3.0-only
	+
	+defmodule Pleroma.Web.Federator.Publisher do
	+ alias Pleroma.Activity
	+ alias Pleroma.Config
	+ alias Pleroma.User
	+ alias Pleroma.Web.Federator.RetryQueue
	+
	+ require Logger
	+
	+ @moduledoc """
	+ Defines the contract used by federation implementations to publish messages to
	+ their peers.
	+ """
	+
	+ @doc """
	+ Determine whether an activity can be relayed using the federation module.
	+ """
	+ @callback is_representable?(Pleroma.Activity.t()) :: boolean()
	+
	+ @doc """
	+ Relays an activity to a specified peer, determined by the parameters. The
	+ parameters used are controlled by the federation module.
	+ """
	+ @callback publish_one(Map.t()) :: {:ok, Map.t()} \| {:error, any()}
	+
	+ @doc """
	+ Enqueue publishing a single activity.
	+ """
	+ @spec enqueue_one(module(), Map.t()) :: :ok
	+ def enqueue_one(module, %{} = params),
	+ do: PleromaJobQueue.enqueue(:federation_outgoing, __MODULE__, [:publish_one, module, params])
	+
	+ @spec perform(atom(), module(), any()) :: {:ok, any()} \| {:error, any()}
	+ def perform(:publish_one, module, params) do
	+ case apply(module, :publish_one, [params]) do
	+ {:ok, _} ->
	+ :ok
	+
	+ {:error, _e} ->
	+ RetryQueue.enqueue(params, module)
	+ end
	+ end
	+
	+ def perform(type, _, _) do
	+ Logger.debug("Unknown task: #{type}")
	+ {:error, "Don't know what to do with this"}
	+ end
	+
	+ @doc """
	+ Relays an activity to all specified peers.
	+ """
	+ @callback publish(Pleroma.User.t(), Pleroma.Activity.t()) :: :ok \| {:error, any()}
	+
	+ @spec publish(Pleroma.User.t(), Pleroma.Activity.t()) :: :ok
	+ def publish(%User{} = user, %Activity{} = activity) do
	+ Config.get([:instance, :federation_publisher_modules])
	+ \|> Enum.each(fn module ->
	+ if module.is_representable?(activity) do
	+ Logger.info("Publishing #{activity.data["id"]} using #{inspect(module)}")
	+ module.publish(user, activity)
	+ end
	+ end)
	+
	+ :ok
	+ end
	+
	+ @doc """
	+ Gathers links used by an outgoing federation module for WebFinger output.
	+ """
	+ @callback gather_webfinger_links(Pleroma.User.t()) :: list()
	+
	+ @spec gather_webfinger_links(Pleroma.User.t()) :: list()
	+ def gather_webfinger_links(%User{} = user) do
	+ Config.get([:instance, :federation_publisher_modules])
	+ \|> Enum.reduce([], fn module, links ->
	+ links ++ module.gather_webfinger_links(user)
	+ end)
	+ end
	+
	+ @doc """
	+ Gathers nodeinfo protocol names supported by the federation module.
	+ """
	+ @callback gather_nodeinfo_protocol_names() :: list()
	+
	+ @spec gather_nodeinfo_protocol_names() :: list()
	+ def gather_nodeinfo_protocol_names do
	+ Config.get([:instance, :federation_publisher_modules])
	+ \|> Enum.reduce([], fn module, links ->
	+ links ++ module.gather_nodeinfo_protocol_names()
	+ end)
	+ end
	+end
	diff --git a/lib/pleroma/web/nodeinfo/nodeinfo_controller.ex b/lib/pleroma/web/nodeinfo/nodeinfo_controller.ex
	index 216a962bd..3bf2a0fbc 100644
	--- a/lib/pleroma/web/nodeinfo/nodeinfo_controller.ex
	+++ b/lib/pleroma/web/nodeinfo/nodeinfo_controller.ex
	@@ -1,217 +1,218 @@
	# Pleroma: A lightweight social networking server
	# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
	# SPDX-License-Identifier: AGPL-3.0-only

	defmodule Pleroma.Web.Nodeinfo.NodeinfoController do
	use Pleroma.Web, :controller

	alias Pleroma.Config
	alias Pleroma.Stats
	alias Pleroma.User
	alias Pleroma.Web
	alias Pleroma.Web.ActivityPub.MRF
	+ alias Pleroma.Web.Federator.Publisher

	plug(Pleroma.Web.FederatingPlug)

	def schemas(conn, _params) do
	response = %{
	links: [
	%{
	rel: "http://nodeinfo.diaspora.software/ns/schema/2.0",
	href: Web.base_url() <> "/nodeinfo/2.0.json"
	},
	%{
	rel: "http://nodeinfo.diaspora.software/ns/schema/2.1",
	href: Web.base_url() <> "/nodeinfo/2.1.json"
	}
	]
	}

	json(conn, response)
	end

	# returns a nodeinfo 2.0 map, since 2.1 just adds a repository field
	# under software.
	def raw_nodeinfo do
	instance = Application.get_env(:pleroma, :instance)
	media_proxy = Application.get_env(:pleroma, :media_proxy)
	suggestions = Application.get_env(:pleroma, :suggestions)
	chat = Application.get_env(:pleroma, :chat)
	gopher = Application.get_env(:pleroma, :gopher)
	stats = Stats.get_stats()

	mrf_simple =
	Application.get_env(:pleroma, :mrf_simple)
	\|> Enum.into(%{})

	# This horror is needed to convert regex sigils to strings
	mrf_keyword =
	Application.get_env(:pleroma, :mrf_keyword, [])
	\|> Enum.map(fn {key, value} ->
	{key,
	Enum.map(value, fn
	{pattern, replacement} ->
	%{
	"pattern" =>
	if not is_binary(pattern) do
	inspect(pattern)
	else
	pattern
	end,
	"replacement" => replacement
	}

	pattern ->
	if not is_binary(pattern) do
	inspect(pattern)
	else
	pattern
	end
	end)}
	end)
	\|> Enum.into(%{})

	mrf_policies =
	MRF.get_policies()
	\|> Enum.map(fn policy -> to_string(policy) \|> String.split(".") \|> List.last() end)

	quarantined = Keyword.get(instance, :quarantined_instances)

	quarantined =
	if is_list(quarantined) do
	quarantined
	else
	[]
	end

	staff_accounts =
	User.all_superusers()
	\|> Enum.map(fn u -> u.ap_id end)

	mrf_user_allowlist =
	Config.get([:mrf_user_allowlist], [])
	\|> Enum.into(%{}, fn {k, v} -> {k, length(v)} end)

	federation_response =
	if Keyword.get(instance, :mrf_transparency) do
	%{
	mrf_policies: mrf_policies,
	mrf_simple: mrf_simple,
	mrf_keyword: mrf_keyword,
	mrf_user_allowlist: mrf_user_allowlist,
	quarantined_instances: quarantined
	}
	else
	%{}
	end

	features =
	[
	"pleroma_api",
	"mastodon_api",
	"mastodon_api_streaming",
	if Keyword.get(media_proxy, :enabled) do
	"media_proxy"
	end,
	if Keyword.get(gopher, :enabled) do
	"gopher"
	end,
	if Keyword.get(chat, :enabled) do
	"chat"
	end,
	if Keyword.get(suggestions, :enabled) do
	"suggestions"
	end,
	if Keyword.get(instance, :allow_relay) do
	"relay"
	end,
	if Keyword.get(instance, :safe_dm_mentions) do
	"safe_dm_mentions"
	end
	]
	\|> Enum.filter(& &1)

	%{
	version: "2.0",
	software: %{
	name: Pleroma.Application.name() \|> String.downcase(),
	version: Pleroma.Application.version()
	},
	- protocols: ["ostatus", "activitypub"],
	+ protocols: Publisher.gather_nodeinfo_protocol_names(),
	services: %{
	inbound: [],
	outbound: []
	},
	openRegistrations: Keyword.get(instance, :registrations_open),
	usage: %{
	users: %{
	total: stats.user_count \|\| 0
	},
	localPosts: stats.status_count \|\| 0
	},
	metadata: %{
	nodeName: Keyword.get(instance, :name),
	nodeDescription: Keyword.get(instance, :description),
	private: !Keyword.get(instance, :public, true),
	suggestions: %{
	enabled: Keyword.get(suggestions, :enabled, false),
	thirdPartyEngine: Keyword.get(suggestions, :third_party_engine, ""),
	timeout: Keyword.get(suggestions, :timeout, 5000),
	limit: Keyword.get(suggestions, :limit, 23),
	web: Keyword.get(suggestions, :web, "")
	},
	staffAccounts: staff_accounts,
	federation: federation_response,
	postFormats: Keyword.get(instance, :allowed_post_formats),
	uploadLimits: %{
	general: Keyword.get(instance, :upload_limit),
	avatar: Keyword.get(instance, :avatar_upload_limit),
	banner: Keyword.get(instance, :banner_upload_limit),
	background: Keyword.get(instance, :background_upload_limit)
	},
	accountActivationRequired: Keyword.get(instance, :account_activation_required, false),
	invitesEnabled: Keyword.get(instance, :invites_enabled, false),
	features: features,
	restrictedNicknames: Pleroma.Config.get([Pleroma.User, :restricted_nicknames])
	}
	}
	end

	# Schema definition: https://github.com/jhass/nodeinfo/blob/master/schemas/2.0/schema.json
	# and https://github.com/jhass/nodeinfo/blob/master/schemas/2.1/schema.json
	def nodeinfo(conn, %{"version" => "2.0"}) do
	conn
	\|> put_resp_header(
	"content-type",
	"application/json; profile=http://nodeinfo.diaspora.software/ns/schema/2.0#; charset=utf-8"
	)
	\|> json(raw_nodeinfo())
	end

	def nodeinfo(conn, %{"version" => "2.1"}) do
	raw_response = raw_nodeinfo()

	updated_software =
	raw_response
	\|> Map.get(:software)
	\|> Map.put(:repository, Pleroma.Application.repository())

	response =
	raw_response
	\|> Map.put(:software, updated_software)
	\|> Map.put(:version, "2.1")

	conn
	\|> put_resp_header(
	"content-type",
	"application/json; profile=http://nodeinfo.diaspora.software/ns/schema/2.1#; charset=utf-8"
	)
	\|> json(response)
	end

	def nodeinfo(conn, _) do
	conn
	\|> put_status(404)
	\|> json(%{error: "Nodeinfo schema version not handled"})
	end
	end
	diff --git a/lib/pleroma/web/ostatus/ostatus.ex b/lib/pleroma/web/ostatus/ostatus.ex
	index 4744c6d83..61515b31e 100644
	--- a/lib/pleroma/web/ostatus/ostatus.ex
	+++ b/lib/pleroma/web/ostatus/ostatus.ex
	@@ -1,403 +1,404 @@
	# Pleroma: A lightweight social networking server
	# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
	# SPDX-License-Identifier: AGPL-3.0-only

	defmodule Pleroma.Web.OStatus do
	@httpoison Application.get_env(:pleroma, :httpoison)

	import Ecto.Query
	import Pleroma.Web.XML
	require Logger

	alias Pleroma.Activity
	alias Pleroma.Object
	alias Pleroma.Repo
	alias Pleroma.User
	alias Pleroma.Web
	alias Pleroma.Web.ActivityPub.ActivityPub
	alias Pleroma.Web.ActivityPub.Transmogrifier
	+ alias Pleroma.Web.ActivityPub.Visibility
	alias Pleroma.Web.OStatus.DeleteHandler
	alias Pleroma.Web.OStatus.FollowHandler
	alias Pleroma.Web.OStatus.NoteHandler
	alias Pleroma.Web.OStatus.UnfollowHandler
	alias Pleroma.Web.WebFinger
	alias Pleroma.Web.Websub

	def is_representable?(%Activity{} = activity) do
	object = Object.normalize(activity)

	cond do
	is_nil(object) ->
	false

	- object.data["type"] == "Note" ->
	+ Visibility.is_public?(activity) && object.data["type"] == "Note" ->
	true

	true ->
	false
	end
	end

	def feed_path(user) do
	"#{user.ap_id}/feed.atom"
	end

	def pubsub_path(user) do
	"#{Web.base_url()}/push/hub/#{user.nickname}"
	end

	def salmon_path(user) do
	"#{user.ap_id}/salmon"
	end

	def remote_follow_path do
	"#{Web.base_url()}/ostatus_subscribe?acct={uri}"
	end

	def handle_incoming(xml_string) do
	with doc when doc != :error <- parse_document(xml_string) do
	with {:ok, actor_user} <- find_make_or_update_user(doc),
	do: Pleroma.Instances.set_reachable(actor_user.ap_id)

	entries = :xmerl_xpath.string('//entry', doc)

	activities =
	Enum.map(entries, fn entry ->
	{:xmlObj, :string, object_type} =
	:xmerl_xpath.string('string(/entry/activity:object-type[1])', entry)

	{:xmlObj, :string, verb} = :xmerl_xpath.string('string(/entry/activity:verb[1])', entry)
	Logger.debug("Handling #{verb}")

	try do
	case verb do
	'http://activitystrea.ms/schema/1.0/delete' ->
	with {:ok, activity} <- DeleteHandler.handle_delete(entry, doc), do: activity

	'http://activitystrea.ms/schema/1.0/follow' ->
	with {:ok, activity} <- FollowHandler.handle(entry, doc), do: activity

	'http://activitystrea.ms/schema/1.0/unfollow' ->
	with {:ok, activity} <- UnfollowHandler.handle(entry, doc), do: activity

	'http://activitystrea.ms/schema/1.0/share' ->
	with {:ok, activity, retweeted_activity} <- handle_share(entry, doc),
	do: [activity, retweeted_activity]

	'http://activitystrea.ms/schema/1.0/favorite' ->
	with {:ok, activity, favorited_activity} <- handle_favorite(entry, doc),
	do: [activity, favorited_activity]

	_ ->
	case object_type do
	'http://activitystrea.ms/schema/1.0/note' ->
	with {:ok, activity} <- NoteHandler.handle_note(entry, doc), do: activity

	'http://activitystrea.ms/schema/1.0/comment' ->
	with {:ok, activity} <- NoteHandler.handle_note(entry, doc), do: activity

	_ ->
	Logger.error("Couldn't parse incoming document")
	nil
	end
	end
	rescue
	e ->
	Logger.error("Error occured while handling activity")
	Logger.error(xml_string)
	Logger.error(inspect(e))
	nil
	end
	end)
	\|> Enum.filter(& &1)

	{:ok, activities}
	else
	_e -> {:error, []}
	end
	end

	def make_share(entry, doc, retweeted_activity) do
	with {:ok, actor} <- find_make_or_update_user(doc),
	%Object{} = object <- Object.normalize(retweeted_activity),
	id when not is_nil(id) <- string_from_xpath("/entry/id", entry),
	{:ok, activity, _object} = ActivityPub.announce(actor, object, id, false) do
	{:ok, activity}
	end
	end

	def handle_share(entry, doc) do
	with {:ok, retweeted_activity} <- get_or_build_object(entry),
	{:ok, activity} <- make_share(entry, doc, retweeted_activity) do
	{:ok, activity, retweeted_activity}
	else
	e -> {:error, e}
	end
	end

	def make_favorite(entry, doc, favorited_activity) do
	with {:ok, actor} <- find_make_or_update_user(doc),
	%Object{} = object <- Object.normalize(favorited_activity),
	id when not is_nil(id) <- string_from_xpath("/entry/id", entry),
	{:ok, activity, _object} = ActivityPub.like(actor, object, id, false) do
	{:ok, activity}
	end
	end

	def get_or_build_object(entry) do
	with {:ok, activity} <- get_or_try_fetching(entry) do
	{:ok, activity}
	else
	_e ->
	with [object] <- :xmerl_xpath.string('/entry/activity:object', entry) do
	NoteHandler.handle_note(object, object)
	end
	end
	end

	def get_or_try_fetching(entry) do
	Logger.debug("Trying to get entry from db")

	with id when not is_nil(id) <- string_from_xpath("//activity:object[1]/id", entry),
	%Activity{} = activity <- Activity.get_create_by_object_ap_id_with_object(id) do
	{:ok, activity}
	else
	_ ->
	Logger.debug("Couldn't get, will try to fetch")

	with href when not is_nil(href) <-
	string_from_xpath("//activity:object[1]/link[@type=\"text/html\"]/@href", entry),
	{:ok, [favorited_activity]} <- fetch_activity_from_url(href) do
	{:ok, favorited_activity}
	else
	e -> Logger.debug("Couldn't find href: #{inspect(e)}")
	end
	end
	end

	def handle_favorite(entry, doc) do
	with {:ok, favorited_activity} <- get_or_try_fetching(entry),
	{:ok, activity} <- make_favorite(entry, doc, favorited_activity) do
	{:ok, activity, favorited_activity}
	else
	e -> {:error, e}
	end
	end

	def get_attachments(entry) do
	:xmerl_xpath.string('/entry/link[@rel="enclosure"]', entry)
	\|> Enum.map(fn enclosure ->
	with href when not is_nil(href) <- string_from_xpath("/link/@href", enclosure),
	type when not is_nil(type) <- string_from_xpath("/link/@type", enclosure) do
	%{
	"type" => "Attachment",
	"url" => [
	%{
	"type" => "Link",
	"mediaType" => type,
	"href" => href
	}
	]
	}
	end
	end)
	\|> Enum.filter(& &1)
	end

	@doc """
	Gets the content from a an entry.
	"""
	def get_content(entry) do
	string_from_xpath("//content", entry)
	end

	@doc """
	Get the cw that mastodon uses.
	"""
	def get_cw(entry) do
	with cw when not is_nil(cw) <- string_from_xpath("/*/summary", entry) do
	cw
	else
	_e -> nil
	end
	end

	def get_tags(entry) do
	:xmerl_xpath.string('//category', entry)
	\|> Enum.map(fn category -> string_from_xpath("/category/@term", category) end)
	\|> Enum.filter(& &1)
	\|> Enum.map(&String.downcase/1)
	end

	def maybe_update(doc, user) do
	if "true" == string_from_xpath("//author[1]/ap_enabled", doc) do
	Transmogrifier.upgrade_user_from_ap_id(user.ap_id)
	else
	maybe_update_ostatus(doc, user)
	end
	end

	def maybe_update_ostatus(doc, user) do
	old_data = %{
	avatar: user.avatar,
	bio: user.bio,
	name: user.name
	}

	with false <- user.local,
	avatar <- make_avatar_object(doc),
	bio <- string_from_xpath("//author[1]/summary", doc),
	name <- string_from_xpath("//author[1]/poco:displayName", doc),
	new_data <- %{
	avatar: avatar \|\| old_data.avatar,
	name: name \|\| old_data.name,
	bio: bio \|\| old_data.bio
	},
	false <- new_data == old_data do
	change = Ecto.Changeset.change(user, new_data)
	User.update_and_set_cache(change)
	else
	_ ->
	{:ok, user}
	end
	end

	def find_make_or_update_user(doc) do
	uri = string_from_xpath("//author/uri[1]", doc)

	with {:ok, user} <- find_or_make_user(uri) do
	maybe_update(doc, user)
	end
	end

	def find_or_make_user(uri) do
	query = from(user in User, where: user.ap_id == ^uri)

	user = Repo.one(query)

	if is_nil(user) do
	make_user(uri)
	else
	{:ok, user}
	end
	end

	def make_user(uri, update \\ false) do
	with {:ok, info} <- gather_user_info(uri) do
	data = %{
	name: info["name"],
	nickname: info["nickname"] <> "@" <> info["host"],
	ap_id: info["uri"],
	info: info,
	avatar: info["avatar"],
	bio: info["bio"]
	}

	with false <- update,
	%User{} = user <- User.get_cached_by_ap_id(data.ap_id) do
	{:ok, user}
	else
	_e -> User.insert_or_update_user(data)
	end
	end
	end

	# TODO: Just takes the first one for now.
	def make_avatar_object(author_doc, rel \\ "avatar") do
	href = string_from_xpath("//author[1]/link[@rel=\"#{rel}\"]/@href", author_doc)
	type = string_from_xpath("//author[1]/link[@rel=\"#{rel}\"]/@type", author_doc)

	if href do
	%{
	"type" => "Image",
	"url" => [
	%{
	"type" => "Link",
	"mediaType" => type,
	"href" => href
	}
	]
	}
	else
	nil
	end
	end

	def gather_user_info(username) do
	with {:ok, webfinger_data} <- WebFinger.finger(username),
	{:ok, feed_data} <- Websub.gather_feed_data(webfinger_data["topic"]) do
	{:ok, Map.merge(webfinger_data, feed_data) \|> Map.put("fqn", username)}
	else
	e ->
	Logger.debug(fn -> "Couldn't gather info for #{username}" end)
	{:error, e}
	end
	end

	# Regex-based 'parsing' so we don't have to pull in a full html parser
	# It's a hack anyway. Maybe revisit this in the future
	@mastodon_regex ~r/<link href='(.*)' rel='alternate' type='application\/atom\+xml'>/
	@gs_regex ~r/<link title=.* href="(.*)" type="application\/atom\+xml" rel="alternate">/
	@gs_classic_regex ~r/<link rel="alternate" href="(.)" type="application\/atom\+xml" title=.>/
	def get_atom_url(body) do
	cond do
	Regex.match?(@mastodon_regex, body) ->
	[[_, match]] = Regex.scan(@mastodon_regex, body)
	{:ok, match}

	Regex.match?(@gs_regex, body) ->
	[[_, match]] = Regex.scan(@gs_regex, body)
	{:ok, match}

	Regex.match?(@gs_classic_regex, body) ->
	[[_, match]] = Regex.scan(@gs_classic_regex, body)
	{:ok, match}

	true ->
	Logger.debug(fn -> "Couldn't find Atom link in #{inspect(body)}" end)
	{:error, "Couldn't find the Atom link"}
	end
	end

	def fetch_activity_from_atom_url(url) do
	with true <- String.starts_with?(url, "http"),
	{:ok, %{body: body, status: code}} when code in 200..299 <-
	@httpoison.get(
	url,
	[{:Accept, "application/atom+xml"}]
	) do
	Logger.debug("Got document from #{url}, handling...")
	handle_incoming(body)
	else
	e ->
	Logger.debug("Couldn't get #{url}: #{inspect(e)}")
	e
	end
	end

	def fetch_activity_from_html_url(url) do
	Logger.debug("Trying to fetch #{url}")

	with true <- String.starts_with?(url, "http"),
	{:ok, %{body: body}} <- @httpoison.get(url, []),
	{:ok, atom_url} <- get_atom_url(body) do
	fetch_activity_from_atom_url(atom_url)
	else
	e ->
	Logger.debug("Couldn't get #{url}: #{inspect(e)}")
	e
	end
	end

	def fetch_activity_from_url(url) do
	with {:ok, [_ \| _] = activities} <- fetch_activity_from_atom_url(url) do
	{:ok, activities}
	else
	_e -> fetch_activity_from_html_url(url)
	end
	rescue
	e ->
	Logger.debug("Couldn't get #{url}: #{inspect(e)}")
	{:error, "Couldn't get #{url}: #{inspect(e)}"}
	end
	end
	diff --git a/lib/pleroma/web/salmon/salmon.ex b/lib/pleroma/web/salmon/salmon.ex
	index 0a9e51656..42709ab47 100644
	--- a/lib/pleroma/web/salmon/salmon.ex
	+++ b/lib/pleroma/web/salmon/salmon.ex
	@@ -1,243 +1,269 @@
	# Pleroma: A lightweight social networking server
	# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
	# SPDX-License-Identifier: AGPL-3.0-only

	defmodule Pleroma.Web.Salmon do
	+ @behaviour Pleroma.Web.Federator.Publisher
	+
	@httpoison Application.get_env(:pleroma, :httpoison)

	use Bitwise

	+ alias Pleroma.Activity
	alias Pleroma.Instances
	alias Pleroma.User
	+ alias Pleroma.Web.ActivityPub.Visibility
	+ alias Pleroma.Web.Federator.Publisher
	+ alias Pleroma.Web.OStatus
	alias Pleroma.Web.OStatus.ActivityRepresenter
	alias Pleroma.Web.XML

	require Logger

	def decode(salmon) do
	doc = XML.parse_document(salmon)

	{:xmlObj, :string, data} = :xmerl_xpath.string('string(//me:data[1])', doc)
	{:xmlObj, :string, sig} = :xmerl_xpath.string('string(//me:sig[1])', doc)
	{:xmlObj, :string, alg} = :xmerl_xpath.string('string(//me:alg[1])', doc)
	{:xmlObj, :string, encoding} = :xmerl_xpath.string('string(//me:encoding[1])', doc)
	{:xmlObj, :string, type} = :xmerl_xpath.string('string(//me:data[1]/@type)', doc)

	{:ok, data} = Base.url_decode64(to_string(data), ignore: :whitespace)
	{:ok, sig} = Base.url_decode64(to_string(sig), ignore: :whitespace)
	alg = to_string(alg)
	encoding = to_string(encoding)
	type = to_string(type)

	[data, type, encoding, alg, sig]
	end

	def fetch_magic_key(salmon) do
	with [data, _, _, _, _] <- decode(salmon),
	doc <- XML.parse_document(data),
	uri when not is_nil(uri) <- XML.string_from_xpath("/entry/author[1]/uri", doc),
	{:ok, public_key} <- User.get_public_key_for_ap_id(uri),
	magic_key <- encode_key(public_key) do
	{:ok, magic_key}
	end
	end

	def decode_and_validate(magickey, salmon) do
	[data, type, encoding, alg, sig] = decode(salmon)

	signed_text =
	[data, type, encoding, alg]
	\|> Enum.map(&Base.url_encode64/1)
	\|> Enum.join(".")

	key = decode_key(magickey)

	verify = :public_key.verify(signed_text, :sha256, sig, key)

	if verify do
	{:ok, data}
	else
	:error
	end
	end

	def decode_key("RSA." <> magickey) do
	make_integer = fn bin ->
	list = :erlang.binary_to_list(bin)
	Enum.reduce(list, 0, fn el, acc -> acc <<< 8 \|\|\| el end)
	end

	[modulus, exponent] =
	magickey
	\|> String.split(".")
	\|> Enum.map(fn n -> Base.url_decode64!(n, padding: false) end)
	\|> Enum.map(make_integer)

	{:RSAPublicKey, modulus, exponent}
	end

	def encode_key({:RSAPublicKey, modulus, exponent}) do
	modulus_enc = :binary.encode_unsigned(modulus) \|> Base.url_encode64()
	exponent_enc = :binary.encode_unsigned(exponent) \|> Base.url_encode64()

	"RSA.#{modulus_enc}.#{exponent_enc}"
	end

	# Native generation of RSA keys is only available since OTP 20+ and in default build conditions
	# We try at compile time to generate natively an RSA key otherwise we fallback on the old way.
	try do
	_ = :public_key.generate_key({:rsa, 2048, 65_537})

	def generate_rsa_pem do
	key = :public_key.generate_key({:rsa, 2048, 65_537})
	entry = :public_key.pem_entry_encode(:RSAPrivateKey, key)
	pem = :public_key.pem_encode([entry]) \|> String.trim_trailing()
	{:ok, pem}
	end
	rescue
	_ ->
	def generate_rsa_pem do
	port = Port.open({:spawn, "openssl genrsa"}, [:binary])

	{:ok, pem} =
	receive do
	{^port, {:data, pem}} -> {:ok, pem}
	end

	Port.close(port)

	if Regex.match?(~r/RSA PRIVATE KEY/, pem) do
	{:ok, pem}
	else
	:error
	end
	end
	end

	def keys_from_pem(pem) do
	[private_key_code] = :public_key.pem_decode(pem)
	private_key = :public_key.pem_entry_decode(private_key_code)
	{:RSAPrivateKey, _, modulus, exponent, _, _, _, _, _, _, _} = private_key
	public_key = {:RSAPublicKey, modulus, exponent}
	{:ok, private_key, public_key}
	end

	def encode(private_key, doc) do
	type = "application/atom+xml"
	encoding = "base64url"
	alg = "RSA-SHA256"

	signed_text =
	[doc, type, encoding, alg]
	\|> Enum.map(&Base.url_encode64/1)
	\|> Enum.join(".")

	signature =
	signed_text
	\|> :public_key.sign(:sha256, private_key)
	\|> to_string
	\|> Base.url_encode64()

	doc_base64 =
	doc
	\|> Base.url_encode64()

	# Don't need proper xml building, these strings are safe to leave unescaped
	salmon = """
	<?xml version="1.0" encoding="UTF-8"?>
	<me:env xmlns:me="http://salmon-protocol.org/ns/magic-env">
	<me:data type="application/atom+xml">#{doc_base64}</me:data>
	<me:encoding>#{encoding}</me:encoding>
	<me:alg>#{alg}</me:alg>
	<me:sig>#{signature}</me:sig>
	</me:env>
	"""

	{:ok, salmon}
	end

	def remote_users(%{data: %{"to" => to} = data}) do
	to = to ++ (data["cc"] \|\| [])

	to
	\|> Enum.map(fn id -> User.get_cached_by_ap_id(id) end)
	\|> Enum.filter(fn user -> user && !user.local end)
	end

	@doc "Pushes an activity to remote account."
	- def send_to_user(%{recipient: %{info: %{salmon: salmon}}} = params),
	- do: send_to_user(Map.put(params, :recipient, salmon))
	+ def publish_one(%{recipient: %{info: %{salmon: salmon}}} = params),
	+ do: publish_one(Map.put(params, :recipient, salmon))

	- def send_to_user(%{recipient: url, feed: feed, poster: poster} = params) when is_binary(url) do
	+ def publish_one(%{recipient: url, feed: feed} = params) when is_binary(url) do
	with {:ok, %{status: code}} when code in 200..299 <-
	- poster.(
	+ @httpoison.post(
	url,
	feed,
	[{"Content-Type", "application/magic-envelope+xml"}]
	) do
	if !Map.has_key?(params, :unreachable_since) \|\| params[:unreachable_since],
	do: Instances.set_reachable(url)

	Logger.debug(fn -> "Pushed to #{url}, code #{code}" end)
	:ok
	else
	e ->
	unless params[:unreachable_since], do: Instances.set_reachable(url)
	Logger.debug(fn -> "Pushing Salmon to #{url} failed, #{inspect(e)}" end)
	- :error
	+ {:error, "Unreachable instance"}
	end
	end

	- def send_to_user(_), do: :noop
	+ def publish_one(_), do: :noop

	@supported_activities [
	"Create",
	"Follow",
	"Like",
	"Announce",
	"Undo",
	"Delete"
	]

	+ def is_representable?(%Activity{data: %{"type" => type}} = activity)
	+ when type in @supported_activities,
	+ do: Visibility.is_public?(activity)
	+
	+ def is_representable?(_), do: false
	+
	@doc """
	Publishes an activity to remote accounts
	"""
	- @spec publish(User.t(), Pleroma.Activity.t(), Pleroma.HTTP.t()) :: none
	- def publish(user, activity, poster \\ &@httpoison.post/3)
	+ @spec publish(User.t(), Pleroma.Activity.t()) :: none
	+ def publish(user, activity)

	- def publish(%{info: %{keys: keys}} = user, %{data: %{"type" => type}} = activity, poster)
	+ def publish(%{info: %{keys: keys}} = user, %{data: %{"type" => type}} = activity)
	when type in @supported_activities do
	feed = ActivityRepresenter.to_simple_form(activity, user, true)

	if feed do
	feed =
	ActivityRepresenter.wrap_with_entry(feed)
	\|> :xmerl.export_simple(:xmerl_xml)
	\|> to_string

	{:ok, private, _} = keys_from_pem(keys)
	{:ok, feed} = encode(private, feed)

	remote_users = remote_users(activity)

	salmon_urls = Enum.map(remote_users, & &1.info.salmon)
	reachable_urls_metadata = Instances.filter_reachable(salmon_urls)
	reachable_urls = Map.keys(reachable_urls_metadata)

	remote_users
	\|> Enum.filter(&(&1.info.salmon in reachable_urls))
	\|> Enum.each(fn remote_user ->
	Logger.debug(fn -> "Sending Salmon to #{remote_user.ap_id}" end)

	- Pleroma.Web.Federator.publish_single_salmon(%{
	+ Publisher.enqueue_one(__MODULE__, %{
	recipient: remote_user,
	feed: feed,
	- poster: poster,
	unreachable_since: reachable_urls_metadata[remote_user.info.salmon]
	})
	end)
	end
	end

	- def publish(%{id: id}, _, _), do: Logger.debug(fn -> "Keys missing for user #{id}" end)
	+ def publish(%{id: id}, _), do: Logger.debug(fn -> "Keys missing for user #{id}" end)
	+
	+ def gather_webfinger_links(%User{} = user) do
	+ {:ok, _private, public} = keys_from_pem(user.info.keys)
	+ magic_key = encode_key(public)
	+
	+ [
	+ %{"rel" => "salmon", "href" => OStatus.salmon_path(user)},
	+ %{
	+ "rel" => "magic-public-key",
	+ "href" => "data:application/magic-public-key,#{magic_key}"
	+ }
	+ ]
	+ end
	+
	+ def gather_nodeinfo_protocol_names, do: []
	end
	diff --git a/lib/pleroma/web/web_finger/web_finger.ex b/lib/pleroma/web/web_finger/web_finger.ex
	index a3b0bf999..3a3b98a10 100644
	--- a/lib/pleroma/web/web_finger/web_finger.ex
	+++ b/lib/pleroma/web/web_finger/web_finger.ex
	@@ -1,287 +1,257 @@
	# Pleroma: A lightweight social networking server
	# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
	# SPDX-License-Identifier: AGPL-3.0-only

	defmodule Pleroma.Web.WebFinger do
	@httpoison Application.get_env(:pleroma, :httpoison)

	alias Pleroma.User
	alias Pleroma.Web
	- alias Pleroma.Web.OStatus
	+ alias Pleroma.Web.Federator.Publisher
	alias Pleroma.Web.Salmon
	alias Pleroma.Web.XML
	alias Pleroma.XmlBuilder
	require Jason
	require Logger

	def host_meta do
	base_url = Web.base_url()

	{
	:XRD,
	%{xmlns: "http://docs.oasis-open.org/ns/xri/xrd-1.0"},
	{
	:Link,
	%{
	rel: "lrdd",
	type: "application/xrd+xml",
	template: "#{base_url}/.well-known/webfinger?resource={uri}"
	}
	}
	}
	\|> XmlBuilder.to_doc()
	end

	def webfinger(resource, fmt) when fmt in ["XML", "JSON"] do
	host = Pleroma.Web.Endpoint.host()
	regex = ~r/(acct:)?(?<username>\w+)@#{host}/

	with %{"username" => username} <- Regex.named_captures(regex, resource),
	%User{} = user <- User.get_cached_by_nickname(username) do
	{:ok, represent_user(user, fmt)}
	else
	_e ->
	with %User{} = user <- User.get_cached_by_ap_id(resource) do
	{:ok, represent_user(user, fmt)}
	else
	_e ->
	{:error, "Couldn't find user"}
	end
	end
	end

	+ defp gather_links(%User{} = user) do
	+ [
	+ %{
	+ "rel" => "http://webfinger.net/rel/profile-page",
	+ "type" => "text/html",
	+ "href" => user.ap_id
	+ }
	+ ] ++ Publisher.gather_webfinger_links(user)
	+ end
	+
	def represent_user(user, "JSON") do
	{:ok, user} = ensure_keys_present(user)
	- {:ok, _private, public} = Salmon.keys_from_pem(user.info.keys)
	- magic_key = Salmon.encode_key(public)

	%{
	"subject" => "acct:#{user.nickname}@#{Pleroma.Web.Endpoint.host()}",
	"aliases" => [user.ap_id],
	- "links" => [
	- %{
	- "rel" => "http://schemas.google.com/g/2010#updates-from",
	- "type" => "application/atom+xml",
	- "href" => OStatus.feed_path(user)
	- },
	- %{
	- "rel" => "http://webfinger.net/rel/profile-page",
	- "type" => "text/html",
	- "href" => user.ap_id
	- },
	- %{"rel" => "salmon", "href" => OStatus.salmon_path(user)},
	- %{
	- "rel" => "magic-public-key",
	- "href" => "data:application/magic-public-key,#{magic_key}"
	- },
	- %{"rel" => "self", "type" => "application/activity+json", "href" => user.ap_id},
	- %{
	- "rel" => "self",
	- "type" => "application/ld+json; profile=\"https://www.w3.org/ns/activitystreams\"",
	- "href" => user.ap_id
	- },
	- %{
	- "rel" => "http://ostatus.org/schema/1.0/subscribe",
	- "template" => OStatus.remote_follow_path()
	- }
	- ]
	+ "links" => gather_links(user)
	}
	end

	def represent_user(user, "XML") do
	{:ok, user} = ensure_keys_present(user)
	- {:ok, _private, public} = Salmon.keys_from_pem(user.info.keys)
	- magic_key = Salmon.encode_key(public)
	+
	+ links =
	+ gather_links(user)
	+ \|> Enum.map(fn link -> {:Link, link} end)

	{
	:XRD,
	%{xmlns: "http://docs.oasis-open.org/ns/xri/xrd-1.0"},
	[
	{:Subject, "acct:#{user.nickname}@#{Pleroma.Web.Endpoint.host()}"},
	- {:Alias, user.ap_id},
	- {:Link,
	- %{
	- rel: "http://schemas.google.com/g/2010#updates-from",
	- type: "application/atom+xml",
	- href: OStatus.feed_path(user)
	- }},
	- {:Link,
	- %{rel: "http://webfinger.net/rel/profile-page", type: "text/html", href: user.ap_id}},
	- {:Link, %{rel: "salmon", href: OStatus.salmon_path(user)}},
	- {:Link,
	- %{rel: "magic-public-key", href: "data:application/magic-public-key,#{magic_key}"}},
	- {:Link, %{rel: "self", type: "application/activity+json", href: user.ap_id}},
	- {:Link,
	- %{rel: "http://ostatus.org/schema/1.0/subscribe", template: OStatus.remote_follow_path()}}
	- ]
	+ {:Alias, user.ap_id}
	+ ] ++ links
	}
	\|> XmlBuilder.to_doc()
	end

	# This seems a better fit in Salmon
	def ensure_keys_present(user) do
	info = user.info

	if info.keys do
	{:ok, user}
	else
	{:ok, pem} = Salmon.generate_rsa_pem()

	info_cng =
	info
	\|> Pleroma.User.Info.set_keys(pem)

	cng =
	Ecto.Changeset.change(user)
	\|> Ecto.Changeset.put_embed(:info, info_cng)

	User.update_and_set_cache(cng)
	end
	end

	defp get_magic_key(magic_key) do
	"data:application/magic-public-key," <> magic_key = magic_key
	{:ok, magic_key}
	rescue
	MatchError -> {:error, "Missing magic key data."}
	end

	defp webfinger_from_xml(doc) do
	with magic_key <- XML.string_from_xpath(~s{//Link[@rel="magic-public-key"]/@href}, doc),
	{:ok, magic_key} <- get_magic_key(magic_key),
	topic <-
	XML.string_from_xpath(
	~s{//Link[@rel="http://schemas.google.com/g/2010#updates-from"]/@href},
	doc
	),
	subject <- XML.string_from_xpath("//Subject", doc),
	salmon <- XML.string_from_xpath(~s{//Link[@rel="salmon"]/@href}, doc),
	subscribe_address <-
	XML.string_from_xpath(
	~s{//Link[@rel="http://ostatus.org/schema/1.0/subscribe"]/@template},
	doc
	),
	ap_id <-
	XML.string_from_xpath(
	~s{//Link[@rel="self" and @type="application/activity+json"]/@href},
	doc
	) do
	data = %{
	"magic_key" => magic_key,
	"topic" => topic,
	"subject" => subject,
	"salmon" => salmon,
	"subscribe_address" => subscribe_address,
	"ap_id" => ap_id
	}

	{:ok, data}
	else
	{:error, e} ->
	{:error, e}

	e ->
	{:error, e}
	end
	end

	defp webfinger_from_json(doc) do
	data =
	Enum.reduce(doc["links"], %{"subject" => doc["subject"]}, fn link, data ->
	case {link["type"], link["rel"]} do
	{"application/activity+json", "self"} ->
	Map.put(data, "ap_id", link["href"])

	{"application/ld+json; profile=\"https://www.w3.org/ns/activitystreams\"", "self"} ->
	Map.put(data, "ap_id", link["href"])

	{_, "magic-public-key"} ->
	"data:application/magic-public-key," <> magic_key = link["href"]
	Map.put(data, "magic_key", magic_key)

	{"application/atom+xml", "http://schemas.google.com/g/2010#updates-from"} ->
	Map.put(data, "topic", link["href"])

	{_, "salmon"} ->
	Map.put(data, "salmon", link["href"])

	{_, "http://ostatus.org/schema/1.0/subscribe"} ->
	Map.put(data, "subscribe_address", link["template"])

	_ ->
	Logger.debug("Unhandled type: #{inspect(link["type"])}")
	data
	end
	end)

	{:ok, data}
	end

	def get_template_from_xml(body) do
	xpath = "//Link[@rel='lrdd']/@template"

	with doc when doc != :error <- XML.parse_document(body),
	template when template != nil <- XML.string_from_xpath(xpath, doc) do
	{:ok, template}
	end
	end

	def find_lrdd_template(domain) do
	with {:ok, %{status: status, body: body}} when status in 200..299 <-
	@httpoison.get("http://#{domain}/.well-known/host-meta", []) do
	get_template_from_xml(body)
	else
	_ ->
	with {:ok, %{body: body}} <- @httpoison.get("https://#{domain}/.well-known/host-meta", []) do
	get_template_from_xml(body)
	else
	e -> {:error, "Can't find LRDD template: #{inspect(e)}"}
	end
	end
	end

	def finger(account) do
	account = String.trim_leading(account, "@")

	domain =
	with [_name, domain] <- String.split(account, "@") do
	domain
	else
	_e ->
	URI.parse(account).host
	end

	address =
	case find_lrdd_template(domain) do
	{:ok, template} ->
	String.replace(template, "{uri}", URI.encode(account))

	_ ->
	"https://#{domain}/.well-known/webfinger?resource=acct:#{account}"
	end

	with response <-
	@httpoison.get(
	address,
	Accept: "application/xrd+xml,application/jrd+json"
	),
	{:ok, %{status: status, body: body}} when status in 200..299 <- response do
	doc = XML.parse_document(body)

	if doc != :error do
	webfinger_from_xml(doc)
	else
	with {:ok, doc} <- Jason.decode(body) do
	webfinger_from_json(doc)
	else
	{:error, e} -> e
	end
	end
	else
	e ->
	Logger.debug(fn -> "Couldn't finger #{account}" end)
	Logger.debug(fn -> inspect(e) end)
	{:error, e}
	end
	end
	end
	diff --git a/lib/pleroma/web/websub/websub.ex b/lib/pleroma/web/websub/websub.ex
	index 3ffa6b416..7ad0414ab 100644
	--- a/lib/pleroma/web/websub/websub.ex
	+++ b/lib/pleroma/web/websub/websub.ex
	@@ -1,302 +1,333 @@
	# Pleroma: A lightweight social networking server
	# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
	# SPDX-License-Identifier: AGPL-3.0-only

	defmodule Pleroma.Web.Websub do
	alias Ecto.Changeset
	+ alias Pleroma.Activity
	alias Pleroma.Instances
	alias Pleroma.Repo
	+ alias Pleroma.User
	+ alias Pleroma.Web.ActivityPub.Visibility
	alias Pleroma.Web.Endpoint
	alias Pleroma.Web.Federator
	+ alias Pleroma.Web.Federator.Publisher
	alias Pleroma.Web.OStatus
	alias Pleroma.Web.OStatus.FeedRepresenter
	alias Pleroma.Web.Router.Helpers
	alias Pleroma.Web.Websub.WebsubClientSubscription
	alias Pleroma.Web.Websub.WebsubServerSubscription
	alias Pleroma.Web.XML
	require Logger

	import Ecto.Query

	+ @behaviour Pleroma.Web.Federator.Publisher
	+
	@httpoison Application.get_env(:pleroma, :httpoison)

	def verify(subscription, getter \\ &@httpoison.get/3) do
	challenge = Base.encode16(:crypto.strong_rand_bytes(8))
	lease_seconds = NaiveDateTime.diff(subscription.valid_until, subscription.updated_at)
	lease_seconds = lease_seconds \|> to_string

	params = %{
	"hub.challenge": challenge,
	"hub.lease_seconds": lease_seconds,
	"hub.topic": subscription.topic,
	"hub.mode": "subscribe"
	}

	url = hd(String.split(subscription.callback, "?"))
	query = URI.parse(subscription.callback).query \|\| ""
	params = Map.merge(params, URI.decode_query(query))

	with {:ok, response} <- getter.(url, [], params: params),
	^challenge <- response.body do
	changeset = Changeset.change(subscription, %{state: "active"})
	Repo.update(changeset)
	else
	e ->
	Logger.debug("Couldn't verify subscription")
	Logger.debug(inspect(e))
	{:error, subscription}
	end
	end

	@supported_activities [
	"Create",
	"Follow",
	"Like",
	"Announce",
	"Undo",
	"Delete"
	]
	+
	+ def is_representable?(%Activity{data: %{"type" => type}} = activity)
	+ when type in @supported_activities,
	+ do: Visibility.is_public?(activity)
	+
	+ def is_representable?(_), do: false
	+
	def publish(topic, user, %{data: %{"type" => type}} = activity)
	when type in @supported_activities do
	response =
	user
	\|> FeedRepresenter.to_simple_form([activity], [user])
	\|> :xmerl.export_simple(:xmerl_xml)
	\|> to_string

	query =
	from(
	sub in WebsubServerSubscription,
	where: sub.topic == ^topic and sub.state == "active",
	where: fragment("? > (NOW() at time zone 'UTC')", sub.valid_until)
	)

	subscriptions = Repo.all(query)

	callbacks = Enum.map(subscriptions, & &1.callback)
	reachable_callbacks_metadata = Instances.filter_reachable(callbacks)
	reachable_callbacks = Map.keys(reachable_callbacks_metadata)

	subscriptions
	\|> Enum.filter(&(&1.callback in reachable_callbacks))
	\|> Enum.each(fn sub ->
	data = %{
	xml: response,
	topic: topic,
	callback: sub.callback,
	secret: sub.secret,
	unreachable_since: reachable_callbacks_metadata[sub.callback]
	}

	- Federator.publish_single_websub(data)
	+ Publisher.enqueue_one(__MODULE__, data)
	end)
	end

	def publish(_, _, _), do: ""

	+ def publish(actor, activity), do: publish(Pleroma.Web.OStatus.feed_path(actor), actor, activity)
	+
	def sign(secret, doc) do
	:crypto.hmac(:sha, secret, to_string(doc)) \|> Base.encode16() \|> String.downcase()
	end

	def incoming_subscription_request(user, %{"hub.mode" => "subscribe"} = params) do
	with {:ok, topic} <- valid_topic(params, user),
	{:ok, lease_time} <- lease_time(params),
	secret <- params["hub.secret"],
	callback <- params["hub.callback"] do
	subscription = get_subscription(topic, callback)

	data = %{
	state: subscription.state \|\| "requested",
	topic: topic,
	secret: secret,
	callback: callback
	}

	change = Changeset.change(subscription, data)
	websub = Repo.insert_or_update!(change)

	change =
	Changeset.change(websub, %{valid_until: NaiveDateTime.add(websub.updated_at, lease_time)})

	websub = Repo.update!(change)

	Federator.verify_websub(websub)

	{:ok, websub}
	else
	{:error, reason} ->
	Logger.debug("Couldn't create subscription")
	Logger.debug(inspect(reason))

	{:error, reason}
	end
	end

	def incoming_subscription_request(user, params) do
	Logger.info("Unhandled WebSub request for #{user.nickname}: #{inspect(params)}")

	{:error, "Invalid WebSub request"}
	end

	defp get_subscription(topic, callback) do
	Repo.get_by(WebsubServerSubscription, topic: topic, callback: callback) \|\|
	%WebsubServerSubscription{}
	end

	# Temp hack for mastodon.
	defp lease_time(%{"hub.lease_seconds" => ""}) do
	# three days
	{:ok, 60 * 60 * 24 * 3}
	end

	defp lease_time(%{"hub.lease_seconds" => lease_seconds}) do
	{:ok, String.to_integer(lease_seconds)}
	end

	defp lease_time(_) do
	# three days
	{:ok, 60 * 60 * 24 * 3}
	end

	defp valid_topic(%{"hub.topic" => topic}, user) do
	if topic == OStatus.feed_path(user) do
	{:ok, OStatus.feed_path(user)}
	else
	{:error, "Wrong topic requested, expected #{OStatus.feed_path(user)}, got #{topic}"}
	end
	end

	def subscribe(subscriber, subscribed, requester \\ &request_subscription/1) do
	topic = subscribed.info.topic
	# FIXME: Race condition, use transactions
	{:ok, subscription} =
	with subscription when not is_nil(subscription) <-
	Repo.get_by(WebsubClientSubscription, topic: topic) do
	subscribers = [subscriber.ap_id \| subscription.subscribers] \|> Enum.uniq()
	change = Ecto.Changeset.change(subscription, %{subscribers: subscribers})
	Repo.update(change)
	else
	_e ->
	subscription = %WebsubClientSubscription{
	topic: topic,
	hub: subscribed.info.hub,
	subscribers: [subscriber.ap_id],
	state: "requested",
	secret: :crypto.strong_rand_bytes(8) \|> Base.url_encode64(),
	user: subscribed
	}

	Repo.insert(subscription)
	end

	requester.(subscription)
	end

	def gather_feed_data(topic, getter \\ &@httpoison.get/1) do
	with {:ok, response} <- getter.(topic),
	status when status in 200..299 <- response.status,
	body <- response.body,
	doc <- XML.parse_document(body),
	uri when not is_nil(uri) <- XML.string_from_xpath("/feed/author[1]/uri", doc),
	hub when not is_nil(hub) <- XML.string_from_xpath(~S{/feed/link[@rel="hub"]/@href}, doc) do
	name = XML.string_from_xpath("/feed/author[1]/name", doc)
	preferred_username = XML.string_from_xpath("/feed/author[1]/poco:preferredUsername", doc)
	display_name = XML.string_from_xpath("/feed/author[1]/poco:displayName", doc)
	avatar = OStatus.make_avatar_object(doc)
	bio = XML.string_from_xpath("/feed/author[1]/summary", doc)

	{:ok,
	%{
	"uri" => uri,
	"hub" => hub,
	"nickname" => preferred_username \|\| name,
	"name" => display_name \|\| name,
	"host" => URI.parse(uri).host,
	"avatar" => avatar,
	"bio" => bio
	}}
	else
	e ->
	{:error, e}
	end
	end

	def request_subscription(websub, poster \\ &@httpoison.post/3, timeout \\ 10_000) do
	data = [
	"hub.mode": "subscribe",
	"hub.topic": websub.topic,
	"hub.secret": websub.secret,
	"hub.callback": Helpers.websub_url(Endpoint, :websub_subscription_confirmation, websub.id)
	]

	# This checks once a second if we are confirmed yet
	websub_checker = fn ->
	helper = fn helper ->
	:timer.sleep(1000)
	websub = Repo.get_by(WebsubClientSubscription, id: websub.id, state: "accepted")
	if websub, do: websub, else: helper.(helper)
	end

	helper.(helper)
	end

	task = Task.async(websub_checker)

	with {:ok, %{status: 202}} <-
	poster.(websub.hub, {:form, data}, "Content-type": "application/x-www-form-urlencoded"),
	{:ok, websub} <- Task.yield(task, timeout) do
	{:ok, websub}
	else
	e ->
	Task.shutdown(task)

	change = Ecto.Changeset.change(websub, %{state: "rejected"})
	{:ok, websub} = Repo.update(change)

	Logger.debug(fn -> "Couldn't confirm subscription: #{inspect(websub)}" end)
	Logger.debug(fn -> "error: #{inspect(e)}" end)

	{:error, websub}
	end
	end

	def refresh_subscriptions(delta \\ 60 * 60 * 24) do
	Logger.debug("Refreshing subscriptions")

	cut_off = NaiveDateTime.add(NaiveDateTime.utc_now(), delta)

	query = from(sub in WebsubClientSubscription, where: sub.valid_until < ^cut_off)

	subs = Repo.all(query)

	Enum.each(subs, fn sub ->
	Federator.request_subscription(sub)
	end)
	end

	def publish_one(%{xml: xml, topic: topic, callback: callback, secret: secret} = params) do
	signature = sign(secret \|\| "", xml)
	Logger.info(fn -> "Pushing #{topic} to #{callback}" end)

	with {:ok, %{status: code}} when code in 200..299 <-
	@httpoison.post(
	callback,
	xml,
	[
	{"Content-Type", "application/atom+xml"},
	{"X-Hub-Signature", "sha1=#{signature}"}
	]
	) do
	if !Map.has_key?(params, :unreachable_since) \|\| params[:unreachable_since],
	do: Instances.set_reachable(callback)

	Logger.info(fn -> "Pushed to #{callback}, code #{code}" end)
	{:ok, code}
	else
	{_post_result, response} ->
	unless params[:unreachable_since], do: Instances.set_reachable(callback)
	Logger.debug(fn -> "Couldn't push to #{callback}, #{inspect(response)}" end)
	{:error, response}
	end
	end
	+
	+ def gather_webfinger_links(%User{} = user) do
	+ [
	+ %{
	+ "rel" => "http://schemas.google.com/g/2010#updates-from",
	+ "type" => "application/atom+xml",
	+ "href" => OStatus.feed_path(user)
	+ },
	+ %{
	+ "rel" => "http://ostatus.org/schema/1.0/subscribe",
	+ "template" => OStatus.remote_follow_path()
	+ }
	+ ]
	+ end
	+
	+ def gather_nodeinfo_protocol_names, do: ["ostatus"]
	end
	diff --git a/lib/xml_builder.ex b/lib/xml_builder.ex
	index 88f8ce2a3..b58602c7b 100644
	--- a/lib/xml_builder.ex
	+++ b/lib/xml_builder.ex
	@@ -1,44 +1,45 @@
	defmodule Pleroma.XmlBuilder do
	def to_xml({tag, attributes, content}) do
	open_tag = make_open_tag(tag, attributes)

	content_xml = to_xml(content)

	"<#{open_tag}>#{content_xml}</#{tag}>"
	end

	def to_xml({tag, %{} = attributes}) do
	open_tag = make_open_tag(tag, attributes)

	"<#{open_tag} />"
	end

	def to_xml({tag, content}), do: to_xml({tag, %{}, content})

	def to_xml(content) when is_binary(content) do
	to_string(content)
	end

	def to_xml(content) when is_list(content) do
	for element <- content do
	to_xml(element)
	end
	\|> Enum.join()
	end

	def to_xml(%NaiveDateTime{} = time) do
	NaiveDateTime.to_iso8601(time)
	end

	def to_doc(content), do: ~s(<?xml version="1.0" encoding="UTF-8"?>) <> to_xml(content)

	defp make_open_tag(tag, attributes) do
	attributes_string =
	for {attribute, value} <- attributes do
	+ value = String.replace(value, "\"", """)
	"#{attribute}=\"#{value}\""
	end
	\|> Enum.join(" ")

	[tag, attributes_string] \|> Enum.join(" ") \|> String.trim()
	end
	end
	diff --git a/test/web/activity_pub/activity_pub_test.exs b/test/web/activity_pub/activity_pub_test.exs
	index 1e056b7ee..0f90aa1ac 100644
	--- a/test/web/activity_pub/activity_pub_test.exs
	+++ b/test/web/activity_pub/activity_pub_test.exs
	@@ -1,1164 +1,1162 @@
	# Pleroma: A lightweight social networking server
	# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
	# SPDX-License-Identifier: AGPL-3.0-only

	defmodule Pleroma.Web.ActivityPub.ActivityPubTest do
	use Pleroma.DataCase
	alias Pleroma.Activity
	alias Pleroma.Builders.ActivityBuilder
	alias Pleroma.Instances
	alias Pleroma.Object
	alias Pleroma.User
	alias Pleroma.Web.ActivityPub.ActivityPub
	+ alias Pleroma.Web.ActivityPub.Publisher
	alias Pleroma.Web.ActivityPub.Utils
	alias Pleroma.Web.CommonAPI

	import Pleroma.Factory
	import Tesla.Mock
	import Mock

	setup do
	mock(fn env -> apply(HttpRequestMock, :request, [env]) end)
	:ok
	end

	describe "streaming out participations" do
	test "it streams them out" do
	user = insert(:user)
	{:ok, activity} = CommonAPI.post(user, %{"status" => ".", "visibility" => "direct"})

	{:ok, conversation} = Pleroma.Conversation.create_or_bump_for(activity)

	participations =
	conversation.participations
	\|> Repo.preload(:user)

	with_mock Pleroma.Web.Streamer,
	stream: fn _, _ -> nil end do
	ActivityPub.stream_out_participations(conversation.participations)

	Enum.each(participations, fn participation ->
	assert called(Pleroma.Web.Streamer.stream("participation", participation))
	end)
	end
	end
	end

	describe "fetching restricted by visibility" do
	test "it restricts by the appropriate visibility" do
	user = insert(:user)

	{:ok, public_activity} = CommonAPI.post(user, %{"status" => ".", "visibility" => "public"})

	{:ok, direct_activity} = CommonAPI.post(user, %{"status" => ".", "visibility" => "direct"})

	{:ok, unlisted_activity} =
	CommonAPI.post(user, %{"status" => ".", "visibility" => "unlisted"})

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

	activities =
	ActivityPub.fetch_activities([], %{:visibility => "direct", "actor_id" => user.ap_id})

	assert activities == [direct_activity]

	activities =
	ActivityPub.fetch_activities([], %{:visibility => "unlisted", "actor_id" => user.ap_id})

	assert activities == [unlisted_activity]

	activities =
	ActivityPub.fetch_activities([], %{:visibility => "private", "actor_id" => user.ap_id})

	assert activities == [private_activity]

	activities =
	ActivityPub.fetch_activities([], %{:visibility => "public", "actor_id" => user.ap_id})

	assert activities == [public_activity]

	activities =
	ActivityPub.fetch_activities([], %{
	:visibility => ~w[private public],
	"actor_id" => user.ap_id
	})

	assert activities == [public_activity, private_activity]
	end
	end

	describe "building a user from his ap id" do
	test "it returns a user" do
	user_id = "http://mastodon.example.org/users/admin"
	{:ok, user} = ActivityPub.make_user_from_ap_id(user_id)
	assert user.ap_id == user_id
	assert user.nickname == "admin@mastodon.example.org"
	assert user.info.source_data
	assert user.info.ap_enabled
	assert user.follower_address == "http://mastodon.example.org/users/admin/followers"
	end

	test "it fetches the appropriate tag-restricted posts" do
	user = insert(:user)

	{:ok, status_one} = CommonAPI.post(user, %{"status" => ". #test"})
	{:ok, status_two} = CommonAPI.post(user, %{"status" => ". #essais"})
	{:ok, status_three} = CommonAPI.post(user, %{"status" => ". #test #reject"})

	fetch_one = ActivityPub.fetch_activities([], %{"type" => "Create", "tag" => "test"})

	fetch_two =
	ActivityPub.fetch_activities([], %{"type" => "Create", "tag" => ["test", "essais"]})

	fetch_three =
	ActivityPub.fetch_activities([], %{
	"type" => "Create",
	"tag" => ["test", "essais"],
	"tag_reject" => ["reject"]
	})

	fetch_four =
	ActivityPub.fetch_activities([], %{
	"type" => "Create",
	"tag" => ["test"],
	"tag_all" => ["test", "reject"]
	})

	assert fetch_one == [status_one, status_three]
	assert fetch_two == [status_one, status_two, status_three]
	assert fetch_three == [status_one, status_two]
	assert fetch_four == [status_three]
	end
	end

	describe "insertion" do
	test "drops activities beyond a certain limit" do
	limit = Pleroma.Config.get([:instance, :remote_limit])

	random_text =
	:crypto.strong_rand_bytes(limit + 1)
	\|> Base.encode64()
	\|> binary_part(0, limit + 1)

	data = %{
	"ok" => true,
	"object" => %{
	"content" => random_text
	}
	}

	assert {:error, {:remote_limit_error, _}} = ActivityPub.insert(data)
	end

	test "doesn't drop activities with content being null" do
	user = insert(:user)

	data = %{
	"actor" => user.ap_id,
	"to" => [],
	"object" => %{
	"actor" => user.ap_id,
	"to" => [],
	"type" => "Note",
	"content" => nil
	}
	}

	assert {:ok, _} = ActivityPub.insert(data)
	end

	test "returns the activity if one with the same id is already in" do
	activity = insert(:note_activity)
	{:ok, new_activity} = ActivityPub.insert(activity.data)

	assert activity.id == new_activity.id
	end

	test "inserts a given map into the activity database, giving it an id if it has none." do
	user = insert(:user)

	data = %{
	"actor" => user.ap_id,
	"to" => [],
	"object" => %{
	"actor" => user.ap_id,
	"to" => [],
	"type" => "Note",
	"content" => "hey"
	}
	}

	{:ok, %Activity{} = activity} = ActivityPub.insert(data)
	assert activity.data["ok"] == data["ok"]
	assert is_binary(activity.data["id"])

	given_id = "bla"

	data = %{
	"id" => given_id,
	"actor" => user.ap_id,
	"to" => [],
	"context" => "blabla",
	"object" => %{
	"actor" => user.ap_id,
	"to" => [],
	"type" => "Note",
	"content" => "hey"
	}
	}

	{:ok, %Activity{} = activity} = ActivityPub.insert(data)
	assert activity.data["ok"] == data["ok"]
	assert activity.data["id"] == given_id
	assert activity.data["context"] == "blabla"
	assert activity.data["context_id"]
	end

	test "adds a context when none is there" do
	user = insert(:user)

	data = %{
	"actor" => user.ap_id,
	"to" => [],
	"object" => %{
	"actor" => user.ap_id,
	"to" => [],
	"type" => "Note",
	"content" => "hey"
	}
	}

	{:ok, %Activity{} = activity} = ActivityPub.insert(data)
	object = Pleroma.Object.normalize(activity)

	assert is_binary(activity.data["context"])
	assert is_binary(object.data["context"])
	assert activity.data["context_id"]
	assert object.data["context_id"]
	end

	test "adds an id to a given object if it lacks one and is a note and inserts it to the object database" do
	user = insert(:user)

	data = %{
	"actor" => user.ap_id,
	"to" => [],
	"object" => %{
	"actor" => user.ap_id,
	"to" => [],
	"type" => "Note",
	"content" => "hey"
	}
	}

	{:ok, %Activity{} = activity} = ActivityPub.insert(data)
	object = Object.normalize(activity.data["object"])

	assert is_binary(object.data["id"])
	assert %Object{} = Object.get_by_ap_id(activity.data["object"])
	end
	end

	describe "create activities" do
	test "removes doubled 'to' recipients" do
	user = insert(:user)

	{:ok, activity} =
	ActivityPub.create(%{
	to: ["user1", "user1", "user2"],
	actor: user,
	context: "",
	object: %{
	"to" => ["user1", "user1", "user2"],
	"type" => "Note",
	"content" => "testing"
	}
	})

	assert activity.data["to"] == ["user1", "user2"]
	assert activity.actor == user.ap_id
	assert activity.recipients == ["user1", "user2", user.ap_id]
	end

	test "increases user note count only for public activities" do
	user = insert(:user)

	{:ok, _} =
	CommonAPI.post(User.get_cached_by_id(user.id), %{
	"status" => "1",
	"visibility" => "public"
	})

	{:ok, _} =
	CommonAPI.post(User.get_cached_by_id(user.id), %{
	"status" => "2",
	"visibility" => "unlisted"
	})

	{:ok, _} =
	CommonAPI.post(User.get_cached_by_id(user.id), %{
	"status" => "2",
	"visibility" => "private"
	})

	{:ok, _} =
	CommonAPI.post(User.get_cached_by_id(user.id), %{
	"status" => "3",
	"visibility" => "direct"
	})

	user = User.get_cached_by_id(user.id)
	assert user.info.note_count == 2
	end

	test "increases replies count" do
	user = insert(:user)
	user2 = insert(:user)

	{:ok, activity} = CommonAPI.post(user, %{"status" => "1", "visibility" => "public"})
	ap_id = activity.data["id"]
	reply_data = %{"status" => "1", "in_reply_to_status_id" => activity.id}

	# public
	{:ok, _} = CommonAPI.post(user2, Map.put(reply_data, "visibility", "public"))
	assert %{data: data, object: object} = Activity.get_by_ap_id_with_object(ap_id)
	assert object.data["repliesCount"] == 1

	# unlisted
	{:ok, _} = CommonAPI.post(user2, Map.put(reply_data, "visibility", "unlisted"))
	assert %{data: data, object: object} = Activity.get_by_ap_id_with_object(ap_id)
	assert object.data["repliesCount"] == 2

	# private
	{:ok, _} = CommonAPI.post(user2, Map.put(reply_data, "visibility", "private"))
	assert %{data: data, object: object} = Activity.get_by_ap_id_with_object(ap_id)
	assert object.data["repliesCount"] == 2

	# direct
	{:ok, _} = CommonAPI.post(user2, Map.put(reply_data, "visibility", "direct"))
	assert %{data: data, object: object} = Activity.get_by_ap_id_with_object(ap_id)
	assert object.data["repliesCount"] == 2
	end
	end

	describe "fetch activities for recipients" do
	test "retrieve the activities for certain recipients" do
	{:ok, activity_one} = ActivityBuilder.insert(%{"to" => ["someone"]})
	{:ok, activity_two} = ActivityBuilder.insert(%{"to" => ["someone_else"]})
	{:ok, _activity_three} = ActivityBuilder.insert(%{"to" => ["noone"]})

	activities = ActivityPub.fetch_activities(["someone", "someone_else"])
	assert length(activities) == 2
	assert activities == [activity_one, activity_two]
	end
	end

	describe "fetch activities in context" do
	test "retrieves activities that have a given context" do
	{:ok, activity} = ActivityBuilder.insert(%{"type" => "Create", "context" => "2hu"})
	{:ok, activity_two} = ActivityBuilder.insert(%{"type" => "Create", "context" => "2hu"})
	{:ok, _activity_three} = ActivityBuilder.insert(%{"type" => "Create", "context" => "3hu"})
	{:ok, _activity_four} = ActivityBuilder.insert(%{"type" => "Announce", "context" => "2hu"})
	activity_five = insert(:note_activity)
	user = insert(:user)

	{:ok, user} = User.block(user, %{ap_id: activity_five.data["actor"]})

	activities = ActivityPub.fetch_activities_for_context("2hu", %{"blocking_user" => user})
	assert activities == [activity_two, activity]
	end
	end

	test "doesn't return blocked activities" do
	activity_one = insert(:note_activity)
	activity_two = insert(:note_activity)
	activity_three = insert(:note_activity)
	user = insert(:user)
	booster = insert(:user)
	{:ok, user} = User.block(user, %{ap_id: activity_one.data["actor"]})

	activities =
	ActivityPub.fetch_activities([], %{"blocking_user" => user, "skip_preload" => true})

	assert Enum.member?(activities, activity_two)
	assert Enum.member?(activities, activity_three)
	refute Enum.member?(activities, activity_one)

	{:ok, user} = User.unblock(user, %{ap_id: activity_one.data["actor"]})

	activities =
	ActivityPub.fetch_activities([], %{"blocking_user" => user, "skip_preload" => true})

	assert Enum.member?(activities, activity_two)
	assert Enum.member?(activities, activity_three)
	assert Enum.member?(activities, activity_one)

	{:ok, user} = User.block(user, %{ap_id: activity_three.data["actor"]})
	{:ok, _announce, %{data: %{"id" => id}}} = CommonAPI.repeat(activity_three.id, booster)
	%Activity{} = boost_activity = Activity.get_create_by_object_ap_id(id)
	activity_three = Activity.get_by_id(activity_three.id)

	activities =
	ActivityPub.fetch_activities([], %{"blocking_user" => user, "skip_preload" => true})

	assert Enum.member?(activities, activity_two)
	refute Enum.member?(activities, activity_three)
	refute Enum.member?(activities, boost_activity)
	assert Enum.member?(activities, activity_one)

	activities =
	ActivityPub.fetch_activities([], %{"blocking_user" => nil, "skip_preload" => true})

	assert Enum.member?(activities, activity_two)
	assert Enum.member?(activities, activity_three)
	assert Enum.member?(activities, boost_activity)
	assert Enum.member?(activities, activity_one)
	end

	test "doesn't return transitive interactions concerning blocked users" do
	blocker = insert(:user)
	blockee = insert(:user)
	friend = insert(:user)

	{:ok, blocker} = User.block(blocker, blockee)

	{:ok, activity_one} = CommonAPI.post(friend, %{"status" => "hey!"})

	{:ok, activity_two} = CommonAPI.post(friend, %{"status" => "hey! @#{blockee.nickname}"})

	{:ok, activity_three} = CommonAPI.post(blockee, %{"status" => "hey! @#{friend.nickname}"})

	{:ok, activity_four} = CommonAPI.post(blockee, %{"status" => "hey! @#{blocker.nickname}"})

	activities = ActivityPub.fetch_activities([], %{"blocking_user" => blocker})

	assert Enum.member?(activities, activity_one)
	refute Enum.member?(activities, activity_two)
	refute Enum.member?(activities, activity_three)
	refute Enum.member?(activities, activity_four)
	end

	test "doesn't return announce activities concerning blocked users" do
	blocker = insert(:user)
	blockee = insert(:user)
	friend = insert(:user)

	{:ok, blocker} = User.block(blocker, blockee)

	{:ok, activity_one} = CommonAPI.post(friend, %{"status" => "hey!"})

	{:ok, activity_two} = CommonAPI.post(blockee, %{"status" => "hey! @#{friend.nickname}"})

	{:ok, activity_three, _} = CommonAPI.repeat(activity_two.id, friend)

	activities =
	ActivityPub.fetch_activities([], %{"blocking_user" => blocker})
	\|> Enum.map(fn act -> act.id end)

	assert Enum.member?(activities, activity_one.id)
	refute Enum.member?(activities, activity_two.id)
	refute Enum.member?(activities, activity_three.id)
	end

	test "doesn't return muted activities" do
	activity_one = insert(:note_activity)
	activity_two = insert(:note_activity)
	activity_three = insert(:note_activity)
	user = insert(:user)
	booster = insert(:user)
	{:ok, user} = User.mute(user, %User{ap_id: activity_one.data["actor"]})

	activities =
	ActivityPub.fetch_activities([], %{"muting_user" => user, "skip_preload" => true})

	assert Enum.member?(activities, activity_two)
	assert Enum.member?(activities, activity_three)
	refute Enum.member?(activities, activity_one)

	# Calling with 'with_muted' will deliver muted activities, too.
	activities =
	ActivityPub.fetch_activities([], %{
	"muting_user" => user,
	"with_muted" => true,
	"skip_preload" => true
	})

	assert Enum.member?(activities, activity_two)
	assert Enum.member?(activities, activity_three)
	assert Enum.member?(activities, activity_one)

	{:ok, user} = User.unmute(user, %User{ap_id: activity_one.data["actor"]})

	activities =
	ActivityPub.fetch_activities([], %{"muting_user" => user, "skip_preload" => true})

	assert Enum.member?(activities, activity_two)
	assert Enum.member?(activities, activity_three)
	assert Enum.member?(activities, activity_one)

	{:ok, user} = User.mute(user, %User{ap_id: activity_three.data["actor"]})
	{:ok, _announce, %{data: %{"id" => id}}} = CommonAPI.repeat(activity_three.id, booster)
	%Activity{} = boost_activity = Activity.get_create_by_object_ap_id(id)
	activity_three = Activity.get_by_id(activity_three.id)

	activities =
	ActivityPub.fetch_activities([], %{"muting_user" => user, "skip_preload" => true})

	assert Enum.member?(activities, activity_two)
	refute Enum.member?(activities, activity_three)
	refute Enum.member?(activities, boost_activity)
	assert Enum.member?(activities, activity_one)

	activities = ActivityPub.fetch_activities([], %{"muting_user" => nil, "skip_preload" => true})

	assert Enum.member?(activities, activity_two)
	assert Enum.member?(activities, activity_three)
	assert Enum.member?(activities, boost_activity)
	assert Enum.member?(activities, activity_one)
	end

	test "does include announces on request" do
	activity_three = insert(:note_activity)
	user = insert(:user)
	booster = insert(:user)

	{:ok, user} = User.follow(user, booster)

	{:ok, announce, _object} = CommonAPI.repeat(activity_three.id, booster)

	[announce_activity] = ActivityPub.fetch_activities([user.ap_id \| user.following])

	assert announce_activity.id == announce.id
	end

	test "excludes reblogs on request" do
	user = insert(:user)
	{:ok, expected_activity} = ActivityBuilder.insert(%{"type" => "Create"}, %{:user => user})
	{:ok, _} = ActivityBuilder.insert(%{"type" => "Announce"}, %{:user => user})

	[activity] = ActivityPub.fetch_user_activities(user, nil, %{"exclude_reblogs" => "true"})

	assert activity == expected_activity
	end

	describe "public fetch activities" do
	test "doesn't retrieve unlisted activities" do
	user = insert(:user)

	{:ok, _unlisted_activity} =
	CommonAPI.post(user, %{"status" => "yeah", "visibility" => "unlisted"})

	{:ok, listed_activity} = CommonAPI.post(user, %{"status" => "yeah"})

	[activity] = ActivityPub.fetch_public_activities()

	assert activity == listed_activity
	end

	test "retrieves public activities" do
	_activities = ActivityPub.fetch_public_activities()

	%{public: public} = ActivityBuilder.public_and_non_public()

	activities = ActivityPub.fetch_public_activities()
	assert length(activities) == 1
	assert Enum.at(activities, 0) == public
	end

	test "retrieves a maximum of 20 activities" do
	activities = ActivityBuilder.insert_list(30)
	last_expected = List.last(activities)

	activities = ActivityPub.fetch_public_activities()
	last = List.last(activities)

	assert length(activities) == 20
	assert last == last_expected
	end

	test "retrieves ids starting from a since_id" do
	activities = ActivityBuilder.insert_list(30)
	later_activities = ActivityBuilder.insert_list(10)
	since_id = List.last(activities).id
	last_expected = List.last(later_activities)

	activities = ActivityPub.fetch_public_activities(%{"since_id" => since_id})
	last = List.last(activities)

	assert length(activities) == 10
	assert last == last_expected
	end

	test "retrieves ids up to max_id" do
	_first_activities = ActivityBuilder.insert_list(10)
	activities = ActivityBuilder.insert_list(20)
	later_activities = ActivityBuilder.insert_list(10)
	max_id = List.first(later_activities).id
	last_expected = List.last(activities)

	activities = ActivityPub.fetch_public_activities(%{"max_id" => max_id})
	last = List.last(activities)

	assert length(activities) == 20
	assert last == last_expected
	end

	test "doesn't return reblogs for users for whom reblogs have been muted" do
	activity = insert(:note_activity)
	user = insert(:user)
	booster = insert(:user)
	{:ok, user} = CommonAPI.hide_reblogs(user, booster)

	{:ok, activity, _} = CommonAPI.repeat(activity.id, booster)

	activities = ActivityPub.fetch_activities([], %{"muting_user" => user})

	refute Enum.any?(activities, fn %{id: id} -> id == activity.id end)
	end

	test "returns reblogs for users for whom reblogs have not been muted" do
	activity = insert(:note_activity)
	user = insert(:user)
	booster = insert(:user)
	{:ok, user} = CommonAPI.hide_reblogs(user, booster)
	{:ok, user} = CommonAPI.show_reblogs(user, booster)

	{:ok, activity, _} = CommonAPI.repeat(activity.id, booster)

	activities = ActivityPub.fetch_activities([], %{"muting_user" => user})

	assert Enum.any?(activities, fn %{id: id} -> id == activity.id end)
	end
	end

	describe "like an object" do
	test "adds a like activity to the db" do
	note_activity = insert(:note_activity)
	object = Object.get_by_ap_id(note_activity.data["object"]["id"])
	user = insert(:user)
	user_two = insert(:user)

	{:ok, like_activity, object} = ActivityPub.like(user, object)

	assert like_activity.data["actor"] == user.ap_id
	assert like_activity.data["type"] == "Like"
	assert like_activity.data["object"] == object.data["id"]
	assert like_activity.data["to"] == [User.ap_followers(user), note_activity.data["actor"]]
	assert like_activity.data["context"] == object.data["context"]
	assert object.data["like_count"] == 1
	assert object.data["likes"] == [user.ap_id]

	# Just return the original activity if the user already liked it.
	{:ok, same_like_activity, object} = ActivityPub.like(user, object)

	assert like_activity == same_like_activity
	assert object.data["likes"] == [user.ap_id]

	[note_activity] = Activity.get_all_create_by_object_ap_id(object.data["id"])
	assert note_activity.data["object"]["like_count"] == 1

	{:ok, _like_activity, object} = ActivityPub.like(user_two, object)
	assert object.data["like_count"] == 2
	end
	end

	describe "unliking" do
	test "unliking a previously liked object" do
	note_activity = insert(:note_activity)
	object = Object.get_by_ap_id(note_activity.data["object"]["id"])
	user = insert(:user)

	# Unliking something that hasn't been liked does nothing
	{:ok, object} = ActivityPub.unlike(user, object)
	assert object.data["like_count"] == 0

	{:ok, like_activity, object} = ActivityPub.like(user, object)
	assert object.data["like_count"] == 1

	{:ok, _, _, object} = ActivityPub.unlike(user, object)
	assert object.data["like_count"] == 0

	assert Activity.get_by_id(like_activity.id) == nil
	end
	end

	describe "announcing an object" do
	test "adds an announce activity to the db" do
	note_activity = insert(:note_activity)
	object = Object.get_by_ap_id(note_activity.data["object"]["id"])
	user = insert(:user)

	{:ok, announce_activity, object} = ActivityPub.announce(user, object)
	assert object.data["announcement_count"] == 1
	assert object.data["announcements"] == [user.ap_id]

	assert announce_activity.data["to"] == [
	User.ap_followers(user),
	note_activity.data["actor"]
	]

	assert announce_activity.data["object"] == object.data["id"]
	assert announce_activity.data["actor"] == user.ap_id
	assert announce_activity.data["context"] == object.data["context"]
	end
	end

	describe "unannouncing an object" do
	test "unannouncing a previously announced object" do
	note_activity = insert(:note_activity)
	object = Object.get_by_ap_id(note_activity.data["object"]["id"])
	user = insert(:user)

	# Unannouncing an object that is not announced does nothing
	# {:ok, object} = ActivityPub.unannounce(user, object)
	# assert object.data["announcement_count"] == 0

	{:ok, announce_activity, object} = ActivityPub.announce(user, object)
	assert object.data["announcement_count"] == 1

	{:ok, unannounce_activity, object} = ActivityPub.unannounce(user, object)
	assert object.data["announcement_count"] == 0

	assert unannounce_activity.data["to"] == [
	User.ap_followers(user),
	announce_activity.data["actor"]
	]

	assert unannounce_activity.data["type"] == "Undo"
	assert unannounce_activity.data["object"] == announce_activity.data
	assert unannounce_activity.data["actor"] == user.ap_id
	assert unannounce_activity.data["context"] == announce_activity.data["context"]

	assert Activity.get_by_id(announce_activity.id) == nil
	end
	end

	describe "uploading files" do
	test "copies the file to the configured folder" do
	file = %Plug.Upload{
	content_type: "image/jpg",
	path: Path.absname("test/fixtures/image.jpg"),
	filename: "an_image.jpg"
	}

	{:ok, %Object{} = object} = ActivityPub.upload(file)
	assert object.data["name"] == "an_image.jpg"
	end

	test "works with base64 encoded images" do
	file = %{
	"img" => data_uri()
	}

	{:ok, %Object{}} = ActivityPub.upload(file)
	end
	end

	describe "fetch the latest Follow" do
	test "fetches the latest Follow activity" do
	%Activity{data: %{"type" => "Follow"}} = activity = insert(:follow_activity)
	follower = Repo.get_by(User, ap_id: activity.data["actor"])
	followed = Repo.get_by(User, ap_id: activity.data["object"])

	assert activity == Utils.fetch_latest_follow(follower, followed)
	end
	end

	describe "following / unfollowing" do
	test "creates a follow activity" do
	follower = insert(:user)
	followed = insert(:user)

	{:ok, activity} = ActivityPub.follow(follower, followed)
	assert activity.data["type"] == "Follow"
	assert activity.data["actor"] == follower.ap_id
	assert activity.data["object"] == followed.ap_id
	end

	test "creates an undo activity for the last follow" do
	follower = insert(:user)
	followed = insert(:user)

	{:ok, follow_activity} = ActivityPub.follow(follower, followed)
	{:ok, activity} = ActivityPub.unfollow(follower, followed)

	assert activity.data["type"] == "Undo"
	assert activity.data["actor"] == follower.ap_id

	assert is_map(activity.data["object"])
	assert activity.data["object"]["type"] == "Follow"
	assert activity.data["object"]["object"] == followed.ap_id
	assert activity.data["object"]["id"] == follow_activity.data["id"]
	end
	end

	describe "blocking / unblocking" do
	test "creates a block activity" do
	blocker = insert(:user)
	blocked = insert(:user)

	{:ok, activity} = ActivityPub.block(blocker, blocked)

	assert activity.data["type"] == "Block"
	assert activity.data["actor"] == blocker.ap_id
	assert activity.data["object"] == blocked.ap_id
	end

	test "creates an undo activity for the last block" do
	blocker = insert(:user)
	blocked = insert(:user)

	{:ok, block_activity} = ActivityPub.block(blocker, blocked)
	{:ok, activity} = ActivityPub.unblock(blocker, blocked)

	assert activity.data["type"] == "Undo"
	assert activity.data["actor"] == blocker.ap_id

	assert is_map(activity.data["object"])
	assert activity.data["object"]["type"] == "Block"
	assert activity.data["object"]["object"] == blocked.ap_id
	assert activity.data["object"]["id"] == block_activity.data["id"]
	end
	end

	describe "deletion" do
	test "it creates a delete activity and deletes the original object" do
	note = insert(:note_activity)
	object = Object.get_by_ap_id(note.data["object"]["id"])
	{:ok, delete} = ActivityPub.delete(object)

	assert delete.data["type"] == "Delete"
	assert delete.data["actor"] == note.data["actor"]
	assert delete.data["object"] == note.data["object"]["id"]

	assert Activity.get_by_id(delete.id) != nil

	assert Repo.get(Object, object.id).data["type"] == "Tombstone"
	end

	test "decrements user note count only for public activities" do
	user = insert(:user, info: %{note_count: 10})

	{:ok, a1} =
	CommonAPI.post(User.get_cached_by_id(user.id), %{
	"status" => "yeah",
	"visibility" => "public"
	})

	{:ok, a2} =
	CommonAPI.post(User.get_cached_by_id(user.id), %{
	"status" => "yeah",
	"visibility" => "unlisted"
	})

	{:ok, a3} =
	CommonAPI.post(User.get_cached_by_id(user.id), %{
	"status" => "yeah",
	"visibility" => "private"
	})

	{:ok, a4} =
	CommonAPI.post(User.get_cached_by_id(user.id), %{
	"status" => "yeah",
	"visibility" => "direct"
	})

	{:ok, _} = Object.normalize(a1) \|> ActivityPub.delete()
	{:ok, _} = Object.normalize(a2) \|> ActivityPub.delete()
	{:ok, _} = Object.normalize(a3) \|> ActivityPub.delete()
	{:ok, _} = Object.normalize(a4) \|> ActivityPub.delete()

	user = User.get_cached_by_id(user.id)
	assert user.info.note_count == 10
	end

	test "it creates a delete activity and checks that it is also sent to users mentioned by the deleted object" do
	user = insert(:user)
	note = insert(:note_activity)

	{:ok, object} =
	Object.get_by_ap_id(note.data["object"]["id"])
	\|> Object.change(%{
	data: %{
	"actor" => note.data["object"]["actor"],
	"id" => note.data["object"]["id"],
	"to" => [user.ap_id],
	"type" => "Note"
	}
	})
	\|> Object.update_and_set_cache()

	{:ok, delete} = ActivityPub.delete(object)

	assert user.ap_id in delete.data["to"]
	end

	test "decreases reply count" do
	user = insert(:user)
	user2 = insert(:user)

	{:ok, activity} = CommonAPI.post(user, %{"status" => "1", "visibility" => "public"})
	reply_data = %{"status" => "1", "in_reply_to_status_id" => activity.id}
	ap_id = activity.data["id"]

	{:ok, public_reply} = CommonAPI.post(user2, Map.put(reply_data, "visibility", "public"))
	{:ok, unlisted_reply} = CommonAPI.post(user2, Map.put(reply_data, "visibility", "unlisted"))
	{:ok, private_reply} = CommonAPI.post(user2, Map.put(reply_data, "visibility", "private"))
	{:ok, direct_reply} = CommonAPI.post(user2, Map.put(reply_data, "visibility", "direct"))

	_ = CommonAPI.delete(direct_reply.id, user2)
	assert %{data: data, object: object} = Activity.get_by_ap_id_with_object(ap_id)
	assert object.data["repliesCount"] == 2

	_ = CommonAPI.delete(private_reply.id, user2)
	assert %{data: data, object: object} = Activity.get_by_ap_id_with_object(ap_id)
	assert object.data["repliesCount"] == 2

	_ = CommonAPI.delete(public_reply.id, user2)
	assert %{data: data, object: object} = Activity.get_by_ap_id_with_object(ap_id)
	assert object.data["repliesCount"] == 1

	_ = CommonAPI.delete(unlisted_reply.id, user2)
	assert %{data: data, object: object} = Activity.get_by_ap_id_with_object(ap_id)
	assert object.data["repliesCount"] == 0
	end
	end

	describe "timeline post-processing" do
	test "it filters broken threads" do
	user1 = insert(:user)
	user2 = insert(:user)
	user3 = insert(:user)

	{:ok, user1} = User.follow(user1, user3)
	assert User.following?(user1, user3)

	{:ok, user2} = User.follow(user2, user3)
	assert User.following?(user2, user3)

	{:ok, user3} = User.follow(user3, user2)
	assert User.following?(user3, user2)

	{:ok, public_activity} = CommonAPI.post(user3, %{"status" => "hi 1"})

	{:ok, private_activity_1} =
	CommonAPI.post(user3, %{"status" => "hi 2", "visibility" => "private"})

	{:ok, private_activity_2} =
	CommonAPI.post(user2, %{
	"status" => "hi 3",
	"visibility" => "private",
	"in_reply_to_status_id" => private_activity_1.id
	})

	{:ok, private_activity_3} =
	CommonAPI.post(user3, %{
	"status" => "hi 4",
	"visibility" => "private",
	"in_reply_to_status_id" => private_activity_2.id
	})

	activities = ActivityPub.fetch_activities([user1.ap_id \| user1.following])

	private_activity_1 = Activity.get_by_ap_id_with_object(private_activity_1.data["id"])

	- assert [public_activity, private_activity_1, private_activity_3] ==
	- activities
	+ assert [public_activity, private_activity_1, private_activity_3] == activities

	assert length(activities) == 3

	activities = ActivityPub.contain_timeline(activities, user1)

	assert [public_activity, private_activity_1] == activities
	assert length(activities) == 2
	end
	end

	describe "update" do
	test "it creates an update activity with the new user data" do
	user = insert(:user)
	{:ok, user} = Pleroma.Web.WebFinger.ensure_keys_present(user)
	user_data = Pleroma.Web.ActivityPub.UserView.render("user.json", %{user: user})

	{:ok, update} =
	ActivityPub.update(%{
	actor: user_data["id"],
	to: [user.follower_address],
	cc: [],
	object: user_data
	})

	assert update.data["actor"] == user.ap_id
	assert update.data["to"] == [user.follower_address]
	assert update.data["object"]["id"] == user_data["id"]
	assert update.data["object"]["type"] == user_data["type"]
	end
	end

	test "returned pinned statuses" do
	Pleroma.Config.put([:instance, :max_pinned_statuses], 3)
	user = insert(:user)

	{:ok, activity_one} = CommonAPI.post(user, %{"status" => "HI!!!"})
	{:ok, activity_two} = CommonAPI.post(user, %{"status" => "HI!!!"})
	{:ok, activity_three} = CommonAPI.post(user, %{"status" => "HI!!!"})

	CommonAPI.pin(activity_one.id, user)
	user = refresh_record(user)

	CommonAPI.pin(activity_two.id, user)
	user = refresh_record(user)

	CommonAPI.pin(activity_three.id, user)
	user = refresh_record(user)

	activities = ActivityPub.fetch_user_activities(user, nil, %{"pinned" => "true"})

	assert 3 = length(activities)
	end

	test "it can create a Flag activity" do
	reporter = insert(:user)
	target_account = insert(:user)
	{:ok, activity} = CommonAPI.post(target_account, %{"status" => "foobar"})
	context = Utils.generate_context_id()
	content = "foobar"

	reporter_ap_id = reporter.ap_id
	target_ap_id = target_account.ap_id
	activity_ap_id = activity.data["id"]

	assert {:ok, activity} =
	ActivityPub.flag(%{
	actor: reporter,
	context: context,
	account: target_account,
	statuses: [activity],
	content: content
	})

	assert %Activity{
	actor: ^reporter_ap_id,
	data: %{
	"type" => "Flag",
	"content" => ^content,
	"context" => ^context,
	"object" => [^target_ap_id, ^activity_ap_id]
	}
	} = activity
	end

	describe "publish_one/1" do
	test_with_mock "calls `Instances.set_reachable` on successful federation if `unreachable_since` is not specified",
	Instances,
	[:passthrough],
	[] do
	actor = insert(:user)
	inbox = "http://200.site/users/nick1/inbox"

	- assert {:ok, _} = ActivityPub.publish_one(%{inbox: inbox, json: "{}", actor: actor, id: 1})
	+ assert {:ok, _} = Publisher.publish_one(%{inbox: inbox, json: "{}", actor: actor, id: 1})

	assert called(Instances.set_reachable(inbox))
	end

	test_with_mock "calls `Instances.set_reachable` on successful federation if `unreachable_since` is set",
	Instances,
	[:passthrough],
	[] do
	actor = insert(:user)
	inbox = "http://200.site/users/nick1/inbox"

	assert {:ok, _} =
	- ActivityPub.publish_one(%{
	+ Publisher.publish_one(%{
	inbox: inbox,
	json: "{}",
	actor: actor,
	id: 1,
	unreachable_since: NaiveDateTime.utc_now()
	})

	assert called(Instances.set_reachable(inbox))
	end

	test_with_mock "does NOT call `Instances.set_reachable` on successful federation if `unreachable_since` is nil",
	Instances,
	[:passthrough],
	[] do
	actor = insert(:user)
	inbox = "http://200.site/users/nick1/inbox"

	assert {:ok, _} =
	- ActivityPub.publish_one(%{
	+ Publisher.publish_one(%{
	inbox: inbox,
	json: "{}",
	actor: actor,
	id: 1,
	unreachable_since: nil
	})

	refute called(Instances.set_reachable(inbox))
	end

	test_with_mock "calls `Instances.set_unreachable` on target inbox on non-2xx HTTP response code",
	Instances,
	[:passthrough],
	[] do
	actor = insert(:user)
	inbox = "http://404.site/users/nick1/inbox"

	- assert {:error, _} =
	- ActivityPub.publish_one(%{inbox: inbox, json: "{}", actor: actor, id: 1})
	+ assert {:error, _} = Publisher.publish_one(%{inbox: inbox, json: "{}", actor: actor, id: 1})

	assert called(Instances.set_unreachable(inbox))
	end

	test_with_mock "it calls `Instances.set_unreachable` on target inbox on request error of any kind",
	Instances,
	[:passthrough],
	[] do
	actor = insert(:user)
	inbox = "http://connrefused.site/users/nick1/inbox"

	- assert {:error, _} =
	- ActivityPub.publish_one(%{inbox: inbox, json: "{}", actor: actor, id: 1})
	+ assert {:error, _} = Publisher.publish_one(%{inbox: inbox, json: "{}", actor: actor, id: 1})

	assert called(Instances.set_unreachable(inbox))
	end

	test_with_mock "does NOT call `Instances.set_unreachable` if target is reachable",
	Instances,
	[:passthrough],
	[] do
	actor = insert(:user)
	inbox = "http://200.site/users/nick1/inbox"

	- assert {:ok, _} = ActivityPub.publish_one(%{inbox: inbox, json: "{}", actor: actor, id: 1})
	+ assert {:ok, _} = Publisher.publish_one(%{inbox: inbox, json: "{}", actor: actor, id: 1})

	refute called(Instances.set_unreachable(inbox))
	end

	test_with_mock "does NOT call `Instances.set_unreachable` if target instance has non-nil `unreachable_since`",
	Instances,
	[:passthrough],
	[] do
	actor = insert(:user)
	inbox = "http://connrefused.site/users/nick1/inbox"

	assert {:error, _} =
	- ActivityPub.publish_one(%{
	+ Publisher.publish_one(%{
	inbox: inbox,
	json: "{}",
	actor: actor,
	id: 1,
	unreachable_since: NaiveDateTime.utc_now()
	})

	refute called(Instances.set_unreachable(inbox))
	end
	end

	def data_uri do
	File.read!("test/fixtures/avatar_data_uri")
	end
	end
	diff --git a/test/web/federator_test.exs b/test/web/federator_test.exs
	index 52729eb50..0f43bc8f2 100644
	--- a/test/web/federator_test.exs
	+++ b/test/web/federator_test.exs
	@@ -1,212 +1,217 @@
	# Pleroma: A lightweight social networking server
	# Copyright © 2017-2018 Pleroma Authors <https://pleroma.social/>
	# SPDX-License-Identifier: AGPL-3.0-only

	defmodule Pleroma.Web.FederatorTest do
	alias Pleroma.Instances
	alias Pleroma.Web.CommonAPI
	alias Pleroma.Web.Federator
	use Pleroma.DataCase
	import Pleroma.Factory
	import Mock

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

	describe "Publish an activity" do
	setup do
	user = insert(:user)
	{:ok, activity} = CommonAPI.post(user, %{"status" => "HI"})

	relay_mock = {
	Pleroma.Web.ActivityPub.Relay,
	[],
	[publish: fn _activity -> send(self(), :relay_publish) end]
	}

	%{activity: activity, relay_mock: relay_mock}
	end

	test "with relays active, it publishes to the relay", %{
	activity: activity,
	relay_mock: relay_mock
	} do
	with_mocks([relay_mock]) do
	Federator.publish(activity)
	end

	assert_received :relay_publish
	end

	test "with relays deactivated, it does not publish to the relay", %{
	activity: activity,
	relay_mock: relay_mock
	} do
	Pleroma.Config.put([:instance, :allow_relay], false)

	with_mocks([relay_mock]) do
	Federator.publish(activity)
	end

	refute_received :relay_publish

	Pleroma.Config.put([:instance, :allow_relay], true)
	end
	end

	describe "Targets reachability filtering in `publish`" do
	test_with_mock "it federates only to reachable instances via AP",
	- Federator,
	+ Pleroma.Web.ActivityPub.Publisher,
	[:passthrough],
	[] do
	user = insert(:user)

	{inbox1, inbox2} =
	{"https://domain.com/users/nick1/inbox", "https://domain2.com/users/nick2/inbox"}

	insert(:user, %{
	local: false,
	nickname: "nick1@domain.com",
	ap_id: "https://domain.com/users/nick1",
	info: %{ap_enabled: true, source_data: %{"inbox" => inbox1}}
	})

	insert(:user, %{
	local: false,
	nickname: "nick2@domain2.com",
	ap_id: "https://domain2.com/users/nick2",
	info: %{ap_enabled: true, source_data: %{"inbox" => inbox2}}
	})

	dt = NaiveDateTime.utc_now()
	Instances.set_unreachable(inbox1, dt)

	Instances.set_consistently_unreachable(URI.parse(inbox2).host)

	{:ok, _activity} =
	CommonAPI.post(user, %{"status" => "HI @nick1@domain.com, @nick2@domain2.com!"})

	- assert called(Federator.publish_single_ap(%{inbox: inbox1, unreachable_since: dt}))
	+ assert called(
	+ Pleroma.Web.ActivityPub.Publisher.publish_one(%{
	+ inbox: inbox1,
	+ unreachable_since: dt
	+ })
	+ )

	- refute called(Federator.publish_single_ap(%{inbox: inbox2}))
	+ refute called(Pleroma.Web.ActivityPub.Publisher.publish_one(%{inbox: inbox2}))
	end

	test_with_mock "it federates only to reachable instances via Websub",
	- Federator,
	+ Pleroma.Web.Websub,
	[:passthrough],
	[] do
	user = insert(:user)
	websub_topic = Pleroma.Web.OStatus.feed_path(user)

	sub1 =
	insert(:websub_subscription, %{
	topic: websub_topic,
	state: "active",
	callback: "http://pleroma.soykaf.com/cb"
	})

	sub2 =
	insert(:websub_subscription, %{
	topic: websub_topic,
	state: "active",
	callback: "https://pleroma2.soykaf.com/cb"
	})

	dt = NaiveDateTime.utc_now()
	Instances.set_unreachable(sub2.callback, dt)

	Instances.set_consistently_unreachable(sub1.callback)

	{:ok, _activity} = CommonAPI.post(user, %{"status" => "HI"})

	assert called(
	- Federator.publish_single_websub(%{
	+ Pleroma.Web.Websub.publish_one(%{
	callback: sub2.callback,
	unreachable_since: dt
	})
	)

	- refute called(Federator.publish_single_websub(%{callback: sub1.callback}))
	+ refute called(Pleroma.Web.Websub.publish_one(%{callback: sub1.callback}))
	end

	test_with_mock "it federates only to reachable instances via Salmon",
	- Federator,
	+ Pleroma.Web.Salmon,
	[:passthrough],
	[] do
	user = insert(:user)

	remote_user1 =
	insert(:user, %{
	local: false,
	nickname: "nick1@domain.com",
	ap_id: "https://domain.com/users/nick1",
	info: %{salmon: "https://domain.com/salmon"}
	})

	remote_user2 =
	insert(:user, %{
	local: false,
	nickname: "nick2@domain2.com",
	ap_id: "https://domain2.com/users/nick2",
	info: %{salmon: "https://domain2.com/salmon"}
	})

	dt = NaiveDateTime.utc_now()
	Instances.set_unreachable(remote_user2.ap_id, dt)

	Instances.set_consistently_unreachable("domain.com")

	{:ok, _activity} =
	CommonAPI.post(user, %{"status" => "HI @nick1@domain.com, @nick2@domain2.com!"})

	assert called(
	- Federator.publish_single_salmon(%{
	+ Pleroma.Web.Salmon.publish_one(%{
	recipient: remote_user2,
	unreachable_since: dt
	})
	)

	- refute called(Federator.publish_single_websub(%{recipient: remote_user1}))
	+ refute called(Pleroma.Web.Salmon.publish_one(%{recipient: remote_user1}))
	end
	end

	describe "Receive an activity" do
	test "successfully processes incoming AP docs with correct origin" do
	params = %{
	"@context" => "https://www.w3.org/ns/activitystreams",
	"actor" => "http://mastodon.example.org/users/admin",
	"type" => "Create",
	"id" => "http://mastodon.example.org/users/admin/activities/1",
	"object" => %{
	"type" => "Note",
	"content" => "hi world!",
	"id" => "http://mastodon.example.org/users/admin/objects/1",
	"attributedTo" => "http://mastodon.example.org/users/admin"
	},
	"to" => ["https://www.w3.org/ns/activitystreams#Public"]
	}

	{:ok, _activity} = Federator.incoming_ap_doc(params)
	end

	test "rejects incoming AP docs with incorrect origin" do
	params = %{
	"@context" => "https://www.w3.org/ns/activitystreams",
	"actor" => "https://niu.moe/users/rye",
	"type" => "Create",
	"id" => "http://mastodon.example.org/users/admin/activities/1",
	"object" => %{
	"type" => "Note",
	"content" => "hi world!",
	"id" => "http://mastodon.example.org/users/admin/objects/1",
	"attributedTo" => "http://mastodon.example.org/users/admin"
	},
	"to" => ["https://www.w3.org/ns/activitystreams#Public"]
	}

	:error = Federator.incoming_ap_doc(params)
	end
	end
	end
	diff --git a/test/web/salmon/salmon_test.exs b/test/web/salmon/salmon_test.exs
	index 7532578ca..232082779 100644
	--- a/test/web/salmon/salmon_test.exs
	+++ b/test/web/salmon/salmon_test.exs
	@@ -1,111 +1,114 @@
	# Pleroma: A lightweight social networking server
	# Copyright © 2017-2018 Pleroma Authors <https://pleroma.social/>
	# SPDX-License-Identifier: AGPL-3.0-only

	defmodule Pleroma.Web.Salmon.SalmonTest do
	use Pleroma.DataCase
	alias Pleroma.Activity
	alias Pleroma.Repo
	alias Pleroma.User
	+ alias Pleroma.Web.Federator.Publisher
	alias Pleroma.Web.Salmon
	+ import Mock
	import Pleroma.Factory

	@magickey "RSA.pu0s-halox4tu7wmES1FVSx6u-4wc0YrUFXcqWXZG4-27UmbCOpMQftRCldNRfyA-qLbz-eqiwQhh-1EwUvjsD4cYbAHNGHwTvDOyx5AKthQUP44ykPv7kjKGh3DWKySJvcs9tlUG87hlo7AvnMo9pwRS_Zz2CacQ-MKaXyDepk=.AQAB"

	@wrong_magickey "RSA.pu0s-halox4tu7wmES1FVSx6u-4wc0YrUFXcqWXZG4-27UmbCOpMQftRCldNRfyA-qLbz-eqiwQhh-1EwUvjsD4cYbAHNGHwTvDOyx5AKthQUP44ykPv7kjKGh3DWKySJvcs9tlUG87hlo7AvnMo9pwRS_Zz2CacQ-MKaXyDepk=.AQAA"

	@magickey_friendica "RSA.AMwa8FUs2fWEjX0xN7yRQgegQffhBpuKNC6fa5VNSVorFjGZhRrlPMn7TQOeihlc9lBz2OsHlIedbYn2uJ7yCs0.AQAB"

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

	test "decodes a salmon" do
	{:ok, salmon} = File.read("test/fixtures/salmon.xml")
	{:ok, doc} = Salmon.decode_and_validate(@magickey, salmon)
	assert Regex.match?(~r/xml/, doc)
	end

	test "errors on wrong magic key" do
	{:ok, salmon} = File.read("test/fixtures/salmon.xml")
	assert Salmon.decode_and_validate(@wrong_magickey, salmon) == :error
	end

	test "generates an RSA private key pem" do
	{:ok, key} = Salmon.generate_rsa_pem()
	assert is_binary(key)
	assert Regex.match?(~r/RSA/, key)
	end

	test "it encodes a magic key from a public key" do
	key = Salmon.decode_key(@magickey)
	magic_key = Salmon.encode_key(key)

	assert @magickey == magic_key
	end

	test "it decodes a friendica public key" do
	_key = Salmon.decode_key(@magickey_friendica)
	end

	test "returns a public and private key from a pem" do
	pem = File.read!("test/fixtures/private_key.pem")
	{:ok, private, public} = Salmon.keys_from_pem(pem)

	assert elem(private, 0) == :RSAPrivateKey
	assert elem(public, 0) == :RSAPublicKey
	end

	test "encodes an xml payload with a private key" do
	doc = File.read!("test/fixtures/incoming_note_activity.xml")
	pem = File.read!("test/fixtures/private_key.pem")
	{:ok, private, public} = Salmon.keys_from_pem(pem)

	# Let's try a roundtrip.
	{:ok, salmon} = Salmon.encode(private, doc)
	{:ok, decoded_doc} = Salmon.decode_and_validate(Salmon.encode_key(public), salmon)

	assert doc == decoded_doc
	end

	test "it gets a magic key" do
	salmon = File.read!("test/fixtures/salmon2.xml")
	{:ok, key} = Salmon.fetch_magic_key(salmon)

	assert key ==
	"RSA.uzg6r1peZU0vXGADWxGJ0PE34WvmhjUmydbX5YYdOiXfODVLwCMi1umGoqUDm-mRu4vNEdFBVJU1CpFA7dKzWgIsqsa501i2XqElmEveXRLvNRWFB6nG03Q5OUY2as8eE54BJm0p20GkMfIJGwP6TSFb-ICp3QjzbatuSPJ6xCE=.AQAB"
	end

	- test "it pushes an activity to remote accounts it's addressed to" do
	+ test_with_mock "it pushes an activity to remote accounts it's addressed to",
	+ Publisher,
	+ [:passthrough],
	+ [] do
	user_data = %{
	info: %{
	salmon: "http://test-example.org/salmon"
	},
	local: false
	}

	mentioned_user = insert(:user, user_data)
	note = insert(:note)

	activity_data = %{
	"id" => Pleroma.Web.ActivityPub.Utils.generate_activity_id(),
	"type" => "Create",
	"actor" => note.data["actor"],
	"to" => note.data["to"] ++ [mentioned_user.ap_id],
	"object" => note.data,
	"published_at" => DateTime.utc_now() \|> DateTime.to_iso8601(),
	"context" => note.data["context"]
	}

	{:ok, activity} = Repo.insert(%Activity{data: activity_data, recipients: activity_data["to"]})
	user = User.get_cached_by_ap_id(activity.data["actor"])
	{:ok, user} = Pleroma.Web.WebFinger.ensure_keys_present(user)

	- poster = fn url, _data, _headers ->
	- assert url == "http://test-example.org/salmon"
	- end
	+ Salmon.publish(user, activity)

	- Salmon.publish(user, activity, poster)
	+ assert called(Publisher.enqueue_one(Salmon, %{recipient: mentioned_user}))
	end
	end

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