1 # Pleroma: A lightweight social networking server
2 # Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
3 # SPDX-License-Identifier: AGPL-3.0-only
5 defmodule Pleroma.Web.ActivityPub.ActivityPub do
7 alias Pleroma.Instances
8 alias Pleroma.Notification
13 alias Pleroma.Web.ActivityPub.MRF
14 alias Pleroma.Web.ActivityPub.Transmogrifier
15 alias Pleroma.Web.Federator
16 alias Pleroma.Web.OStatus
17 alias Pleroma.Web.WebFinger
20 import Pleroma.Web.ActivityPub.Utils
21 import Pleroma.Web.ActivityPub.Visibility
25 @httpoison Application.get_env(:pleroma, :httpoison)
27 # For Announce activities, we filter the recipients based on following status for any actors
28 # that match actual users. See issue #164 for more information about why this is necessary.
29 defp get_recipients(%{"type" => "Announce"} = data) do
32 actor = User.get_cached_by_ap_id(data["actor"])
36 |> Enum.filter(fn recipient ->
37 case User.get_cached_by_ap_id(recipient) do
42 User.following?(user, actor)
49 defp get_recipients(%{"type" => "Create"} = data) do
52 actor = data["actor"] || []
53 recipients = (to ++ cc ++ [actor]) |> Enum.uniq()
57 defp get_recipients(data) do
64 defp check_actor_is_active(actor) do
65 if not is_nil(actor) do
66 with user <- User.get_cached_by_ap_id(actor),
67 false <- user.info.deactivated do
77 defp check_remote_limit(%{"object" => %{"content" => content}}) when not is_nil(content) do
78 limit = Pleroma.Config.get([:instance, :remote_limit])
79 String.length(content) <= limit
82 defp check_remote_limit(_), do: true
84 def increase_note_count_if_public(actor, object) do
85 if is_public?(object), do: User.increase_note_count(actor), else: {:ok, actor}
88 def decrease_note_count_if_public(actor, object) do
89 if is_public?(object), do: User.decrease_note_count(actor), else: {:ok, actor}
92 def insert(map, local \\ true) when is_map(map) do
93 with nil <- Activity.normalize(map),
94 map <- lazy_put_activity_defaults(map),
95 :ok <- check_actor_is_active(map["actor"]),
96 {_, true} <- {:remote_limit_error, check_remote_limit(map)},
97 {:ok, map} <- MRF.filter(map),
98 {:ok, object} <- insert_full_object(map) do
99 {recipients, _, _} = get_recipients(map)
102 Repo.insert(%Activity{
106 recipients: recipients
109 # Splice in the child object if we have one.
111 if !is_nil(object) do
112 Map.put(activity, :object, object)
118 Pleroma.Web.RichMedia.Helpers.fetch_data_for_activity(activity)
121 Notification.create_notifications(activity)
125 %Activity{} = activity -> {:ok, activity}
126 error -> {:error, error}
130 def stream_out(activity) do
131 public = "https://www.w3.org/ns/activitystreams#Public"
133 if activity.data["type"] in ["Create", "Announce", "Delete"] do
134 Pleroma.Web.Streamer.stream("user", activity)
135 Pleroma.Web.Streamer.stream("list", activity)
137 if Enum.member?(activity.data["to"], public) do
138 Pleroma.Web.Streamer.stream("public", activity)
141 Pleroma.Web.Streamer.stream("public:local", activity)
144 if activity.data["type"] in ["Create"] do
145 activity.data["object"]
146 |> Map.get("tag", [])
147 |> Enum.filter(fn tag -> is_bitstring(tag) end)
148 |> Enum.each(fn tag -> Pleroma.Web.Streamer.stream("hashtag:" <> tag, activity) end)
150 if activity.data["object"]["attachment"] != [] do
151 Pleroma.Web.Streamer.stream("public:media", activity)
154 Pleroma.Web.Streamer.stream("public:local:media", activity)
159 if !Enum.member?(activity.data["cc"] || [], public) &&
162 User.get_by_ap_id(activity.data["actor"]).follower_address
164 do: Pleroma.Web.Streamer.stream("direct", activity)
169 def create(%{to: to, actor: actor, context: context, object: object} = params) do
170 additional = params[:additional] || %{}
171 # only accept false as false value
172 local = !(params[:local] == false)
173 published = params[:published]
177 %{to: to, actor: actor, published: published, context: context, object: object},
180 {:ok, activity} <- insert(create_data, local),
181 # Changing note count prior to enqueuing federation task in order to avoid
182 # race conditions on updating user.info
183 {:ok, _actor} <- increase_note_count_if_public(actor, activity),
184 :ok <- maybe_federate(activity) do
189 def accept(%{to: to, actor: actor, object: object} = params) do
190 # only accept false as false value
191 local = !(params[:local] == false)
193 with data <- %{"to" => to, "type" => "Accept", "actor" => actor.ap_id, "object" => object},
194 {:ok, activity} <- insert(data, local),
195 :ok <- maybe_federate(activity) do
200 def reject(%{to: to, actor: actor, object: object} = params) do
201 # only accept false as false value
202 local = !(params[:local] == false)
204 with data <- %{"to" => to, "type" => "Reject", "actor" => actor.ap_id, "object" => object},
205 {:ok, activity} <- insert(data, local),
206 :ok <- maybe_federate(activity) do
211 def update(%{to: to, cc: cc, actor: actor, object: object} = params) do
212 # only accept false as false value
213 local = !(params[:local] == false)
222 {:ok, activity} <- insert(data, local),
223 :ok <- maybe_federate(activity) do
228 # TODO: This is weird, maybe we shouldn't check here if we can make the activity.
230 %User{ap_id: ap_id} = user,
231 %Object{data: %{"id" => _}} = object,
235 with nil <- get_existing_like(ap_id, object),
236 like_data <- make_like_data(user, object, activity_id),
237 {:ok, activity} <- insert(like_data, local),
238 {:ok, object} <- add_like_to_object(activity, object),
239 :ok <- maybe_federate(activity) do
240 {:ok, activity, object}
242 %Activity{} = activity -> {:ok, activity, object}
243 error -> {:error, error}
253 with %Activity{} = like_activity <- get_existing_like(actor.ap_id, object),
254 unlike_data <- make_unlike_data(actor, like_activity, activity_id),
255 {:ok, unlike_activity} <- insert(unlike_data, local),
256 {:ok, _activity} <- Repo.delete(like_activity),
257 {:ok, object} <- remove_like_from_object(like_activity, object),
258 :ok <- maybe_federate(unlike_activity) do
259 {:ok, unlike_activity, like_activity, object}
266 %User{ap_id: _} = user,
267 %Object{data: %{"id" => _}} = object,
272 with true <- is_public?(object),
273 announce_data <- make_announce_data(user, object, activity_id, public),
274 {:ok, activity} <- insert(announce_data, local),
275 {:ok, object} <- add_announce_to_object(activity, object),
276 :ok <- maybe_federate(activity) do
277 {:ok, activity, object}
279 error -> {:error, error}
289 with %Activity{} = announce_activity <- get_existing_announce(actor.ap_id, object),
290 unannounce_data <- make_unannounce_data(actor, announce_activity, activity_id),
291 {:ok, unannounce_activity} <- insert(unannounce_data, local),
292 :ok <- maybe_federate(unannounce_activity),
293 {:ok, _activity} <- Repo.delete(announce_activity),
294 {:ok, object} <- remove_announce_from_object(announce_activity, object) do
295 {:ok, unannounce_activity, object}
301 def follow(follower, followed, activity_id \\ nil, local \\ true) do
302 with data <- make_follow_data(follower, followed, activity_id),
303 {:ok, activity} <- insert(data, local),
304 :ok <- maybe_federate(activity) do
309 def unfollow(follower, followed, activity_id \\ nil, local \\ true) do
310 with %Activity{} = follow_activity <- fetch_latest_follow(follower, followed),
311 {:ok, follow_activity} <- update_follow_state(follow_activity, "cancelled"),
312 unfollow_data <- make_unfollow_data(follower, followed, follow_activity, activity_id),
313 {:ok, activity} <- insert(unfollow_data, local),
314 :ok <- maybe_federate(activity) do
319 def delete(%Object{data: %{"id" => id, "actor" => actor}} = object, local \\ true) do
320 user = User.get_cached_by_ap_id(actor)
321 to = (object.data["to"] || []) ++ (object.data["cc"] || [])
323 with {:ok, object, activity} <- Object.delete(object),
329 "deleted_activity_id" => activity && activity.id
331 {:ok, activity} <- insert(data, local),
332 # Changing note count prior to enqueuing federation task in order to avoid
333 # race conditions on updating user.info
334 {:ok, _actor} <- decrease_note_count_if_public(user, object),
335 :ok <- maybe_federate(activity) do
340 def block(blocker, blocked, activity_id \\ nil, local \\ true) do
341 ap_config = Application.get_env(:pleroma, :activitypub)
342 unfollow_blocked = Keyword.get(ap_config, :unfollow_blocked)
343 outgoing_blocks = Keyword.get(ap_config, :outgoing_blocks)
345 with true <- unfollow_blocked do
346 follow_activity = fetch_latest_follow(blocker, blocked)
348 if follow_activity do
349 unfollow(blocker, blocked, nil, local)
353 with true <- outgoing_blocks,
354 block_data <- make_block_data(blocker, blocked, activity_id),
355 {:ok, activity} <- insert(block_data, local),
356 :ok <- maybe_federate(activity) do
363 def unblock(blocker, blocked, activity_id \\ nil, local \\ true) do
364 with %Activity{} = block_activity <- fetch_latest_block(blocker, blocked),
365 unblock_data <- make_unblock_data(blocker, blocked, block_activity, activity_id),
366 {:ok, activity} <- insert(unblock_data, local),
367 :ok <- maybe_federate(activity) do
381 # only accept false as false value
382 local = !(params[:local] == false)
383 forward = !(params[:forward] == false)
385 additional = params[:additional] || %{}
397 Map.merge(additional, %{"to" => [], "cc" => [account.ap_id]})
399 Map.merge(additional, %{"to" => [], "cc" => []})
402 with flag_data <- make_flag_data(params, additional),
403 {:ok, activity} <- insert(flag_data, local),
404 :ok <- maybe_federate(activity) do
405 Enum.each(User.all_superusers(), fn superuser ->
407 |> Pleroma.AdminEmail.report(actor, account, statuses, content)
408 |> Pleroma.Mailer.deliver_async()
415 def fetch_activities_for_context(context, opts \\ %{}) do
416 public = ["https://www.w3.org/ns/activitystreams#Public"]
419 if opts["user"], do: [opts["user"].ap_id | opts["user"].following] ++ public, else: public
421 query = from(activity in Activity)
425 |> restrict_blocked(opts)
426 |> restrict_recipients(recipients, opts["user"])
433 "?->>'type' = ? and ?->>'context' = ?",
439 order_by: [desc: :id]
441 |> Activity.with_preloaded_object()
446 def fetch_public_activities(opts \\ %{}) do
447 q = fetch_activities_query(["https://www.w3.org/ns/activitystreams#Public"], opts)
450 |> restrict_unlisted()
455 @valid_visibilities ~w[direct unlisted public private]
457 defp restrict_visibility(query, %{visibility: visibility})
458 when is_list(visibility) do
459 if Enum.all?(visibility, &(&1 in @valid_visibilities)) do
465 "activity_visibility(?, ?, ?) = ANY (?)",
473 Ecto.Adapters.SQL.to_sql(:all, Repo, query)
477 Logger.error("Could not restrict visibility to #{visibility}")
481 defp restrict_visibility(query, %{visibility: visibility})
482 when visibility in @valid_visibilities do
487 fragment("activity_visibility(?, ?, ?) = ?", a.actor, a.recipients, a.data, ^visibility)
490 Ecto.Adapters.SQL.to_sql(:all, Repo, query)
495 defp restrict_visibility(_query, %{visibility: visibility})
496 when visibility not in @valid_visibilities do
497 Logger.error("Could not restrict visibility to #{visibility}")
500 defp restrict_visibility(query, _visibility), do: query
502 def fetch_user_activities(user, reading_user, params \\ %{}) do
505 |> Map.put("type", ["Create", "Announce"])
506 |> Map.put("actor_id", user.ap_id)
507 |> Map.put("whole_db", true)
508 |> Map.put("pinned_activity_ids", user.info.pinned_activities)
512 ["https://www.w3.org/ns/activitystreams#Public"] ++
513 [reading_user.ap_id | reading_user.following]
515 ["https://www.w3.org/ns/activitystreams#Public"]
518 fetch_activities(recipients, params)
522 defp restrict_since(query, %{"since_id" => ""}), do: query
524 defp restrict_since(query, %{"since_id" => since_id}) do
525 from(activity in query, where: activity.id > ^since_id)
528 defp restrict_since(query, _), do: query
530 defp restrict_tag_reject(query, %{"tag_reject" => tag_reject})
531 when is_list(tag_reject) and tag_reject != [] do
534 where: fragment(~s(\(not \(? #> '{"object","tag"}'\) \\?| ?\)), activity.data, ^tag_reject)
538 defp restrict_tag_reject(query, _), do: query
540 defp restrict_tag_all(query, %{"tag_all" => tag_all})
541 when is_list(tag_all) and tag_all != [] do
544 where: fragment(~s(\(? #> '{"object","tag"}'\) \\?& ?), activity.data, ^tag_all)
548 defp restrict_tag_all(query, _), do: query
550 defp restrict_tag(query, %{"tag" => tag}) when is_list(tag) do
553 where: fragment(~s(\(? #> '{"object","tag"}'\) \\?| ?), activity.data, ^tag)
557 defp restrict_tag(query, %{"tag" => tag}) when is_binary(tag) do
560 where: fragment(~s(? <@ (? #> '{"object","tag"}'\)), ^tag, activity.data)
564 defp restrict_tag(query, _), do: query
566 defp restrict_to_cc(query, recipients_to, recipients_cc) do
571 "(?->'to' \\?| ?) or (?->'cc' \\?| ?)",
580 defp restrict_recipients(query, [], _user), do: query
582 defp restrict_recipients(query, recipients, nil) do
583 from(activity in query, where: fragment("? && ?", ^recipients, activity.recipients))
586 defp restrict_recipients(query, recipients, user) do
589 where: fragment("? && ?", ^recipients, activity.recipients),
590 or_where: activity.actor == ^user.ap_id
594 defp restrict_limit(query, %{"limit" => limit}) do
595 from(activity in query, limit: ^limit)
598 defp restrict_limit(query, _), do: query
600 defp restrict_local(query, %{"local_only" => true}) do
601 from(activity in query, where: activity.local == true)
604 defp restrict_local(query, _), do: query
606 defp restrict_max(query, %{"max_id" => ""}), do: query
608 defp restrict_max(query, %{"max_id" => max_id}) do
609 from(activity in query, where: activity.id < ^max_id)
612 defp restrict_max(query, _), do: query
614 defp restrict_actor(query, %{"actor_id" => actor_id}) do
615 from(activity in query, where: activity.actor == ^actor_id)
618 defp restrict_actor(query, _), do: query
620 defp restrict_type(query, %{"type" => type}) when is_binary(type) do
621 from(activity in query, where: fragment("?->>'type' = ?", activity.data, ^type))
624 defp restrict_type(query, %{"type" => type}) do
625 from(activity in query, where: fragment("?->>'type' = ANY(?)", activity.data, ^type))
628 defp restrict_type(query, _), do: query
630 defp restrict_favorited_by(query, %{"favorited_by" => ap_id}) do
633 where: fragment(~s(? <@ (? #> '{"object","likes"}'\)), ^ap_id, activity.data)
637 defp restrict_favorited_by(query, _), do: query
639 defp restrict_media(query, %{"only_media" => val}) when val == "true" or val == "1" do
642 where: fragment(~s(not (? #> '{"object","attachment"}' = ?\)), activity.data, ^[])
646 defp restrict_media(query, _), do: query
648 defp restrict_replies(query, %{"exclude_replies" => val}) when val == "true" or val == "1" do
651 where: fragment("?->'object'->>'inReplyTo' is null", activity.data)
655 defp restrict_replies(query, _), do: query
657 defp restrict_reblogs(query, %{"exclude_reblogs" => val}) when val == "true" or val == "1" do
658 from(activity in query, where: fragment("?->>'type' != 'Announce'", activity.data))
661 defp restrict_reblogs(query, _), do: query
663 defp restrict_muted(query, %{"with_muted" => val}) when val in [true, "true", "1"], do: query
665 defp restrict_muted(query, %{"muting_user" => %User{info: info}}) do
670 where: fragment("not (? = ANY(?))", activity.actor, ^mutes),
671 where: fragment("not (?->'to' \\?| ?)", activity.data, ^mutes)
675 defp restrict_muted(query, _), do: query
677 defp restrict_blocked(query, %{"blocking_user" => %User{info: info}}) do
678 blocks = info.blocks || []
679 domain_blocks = info.domain_blocks || []
683 where: fragment("not (? = ANY(?))", activity.actor, ^blocks),
684 where: fragment("not (?->'to' \\?| ?)", activity.data, ^blocks),
685 where: fragment("not (split_part(?, '/', 3) = ANY(?))", activity.actor, ^domain_blocks)
689 defp restrict_blocked(query, _), do: query
691 defp restrict_unlisted(query) do
696 "not (coalesce(?->'cc', '{}'::jsonb) \\?| ?)",
698 ^["https://www.w3.org/ns/activitystreams#Public"]
703 defp restrict_pinned(query, %{"pinned" => "true", "pinned_activity_ids" => ids}) do
704 from(activity in query, where: activity.id in ^ids)
707 defp restrict_pinned(query, _), do: query
709 defp restrict_muted_reblogs(query, %{"muting_user" => %User{info: info}}) do
710 muted_reblogs = info.muted_reblogs || []
714 where: fragment("not ?->>'type' = 'Announce'", activity.data),
715 where: fragment("not ? = ANY(?)", activity.actor, ^muted_reblogs)
719 defp restrict_muted_reblogs(query, _), do: query
721 defp maybe_preload_objects(query, %{"skip_preload" => true}), do: query
723 defp maybe_preload_objects(query, _) do
725 |> Activity.with_preloaded_object()
728 def fetch_activities_query(recipients, opts \\ %{}) do
731 activity in Activity,
733 order_by: [fragment("? desc nulls last", activity.id)]
737 |> maybe_preload_objects(opts)
738 |> restrict_recipients(recipients, opts["user"])
739 |> restrict_tag(opts)
740 |> restrict_tag_reject(opts)
741 |> restrict_tag_all(opts)
742 |> restrict_since(opts)
743 |> restrict_local(opts)
744 |> restrict_limit(opts)
745 |> restrict_max(opts)
746 |> restrict_actor(opts)
747 |> restrict_type(opts)
748 |> restrict_favorited_by(opts)
749 |> restrict_blocked(opts)
750 |> restrict_muted(opts)
751 |> restrict_media(opts)
752 |> restrict_visibility(opts)
753 |> restrict_replies(opts)
754 |> restrict_reblogs(opts)
755 |> restrict_pinned(opts)
756 |> restrict_muted_reblogs(opts)
759 def fetch_activities(recipients, opts \\ %{}) do
760 fetch_activities_query(recipients, opts)
765 def fetch_activities_bounded(recipients_to, recipients_cc, opts \\ %{}) do
766 fetch_activities_query([], opts)
767 |> restrict_to_cc(recipients_to, recipients_cc)
772 def upload(file, opts \\ []) do
773 with {:ok, data} <- Upload.store(file, opts) do
776 Map.put(data, "actor", opts[:actor])
781 Repo.insert(%Object{data: obj_data})
785 def user_data_from_user_object(data) do
787 data["icon"]["url"] &&
790 "url" => [%{"href" => data["icon"]["url"]}]
794 data["image"]["url"] &&
797 "url" => [%{"href" => data["image"]["url"]}]
800 locked = data["manuallyApprovesFollowers"] || false
801 data = Transmogrifier.maybe_fix_user_object(data)
806 "ap_enabled" => true,
807 "source_data" => data,
813 follower_address: data["followers"],
817 # nickname can be nil because of virtual actors
819 if data["preferredUsername"] do
823 "#{data["preferredUsername"]}@#{URI.parse(data["id"]).host}"
826 Map.put(user_data, :nickname, nil)
832 def fetch_and_prepare_user_from_ap_id(ap_id) do
833 with {:ok, data} <- fetch_and_contain_remote_object_from_id(ap_id) do
834 user_data_from_user_object(data)
836 e -> Logger.error("Could not decode user at fetch #{ap_id}, #{inspect(e)}")
840 def make_user_from_ap_id(ap_id) do
841 if _user = User.get_by_ap_id(ap_id) do
842 Transmogrifier.upgrade_user_from_ap_id(ap_id)
844 with {:ok, data} <- fetch_and_prepare_user_from_ap_id(ap_id) do
845 User.insert_or_update_user(data)
852 def make_user_from_nickname(nickname) do
853 with {:ok, %{"ap_id" => ap_id}} when not is_nil(ap_id) <- WebFinger.finger(nickname) do
854 make_user_from_ap_id(ap_id)
856 _e -> {:error, "No AP id in WebFinger"}
860 def should_federate?(inbox, public) do
864 inbox_info = URI.parse(inbox)
865 !Enum.member?(Pleroma.Config.get([:instance, :quarantined_instances], []), inbox_info.host)
869 def publish(actor, activity) do
871 if actor.follower_address in activity.recipients do
872 {:ok, followers} = User.get_followers(actor)
873 followers |> Enum.filter(&(!&1.local))
878 public = is_public?(activity)
880 {:ok, data} = Transmogrifier.prepare_outgoing(activity.data)
881 json = Jason.encode!(data)
883 (Pleroma.Web.Salmon.remote_users(activity) ++ remote_followers)
884 |> Enum.filter(fn user -> User.ap_enabled?(user) end)
885 |> Enum.map(fn %{info: %{source_data: data}} ->
886 (is_map(data["endpoints"]) && Map.get(data["endpoints"], "sharedInbox")) || data["inbox"]
889 |> Enum.filter(fn inbox -> should_federate?(inbox, public) end)
890 |> Instances.filter_reachable()
891 |> Enum.each(fn {inbox, unreachable_since} ->
892 Federator.publish_single_ap(%{
896 id: activity.data["id"],
897 unreachable_since: unreachable_since
902 def publish_one(%{inbox: inbox, json: json, actor: actor, id: id} = params) do
903 Logger.info("Federating #{id} to #{inbox}")
904 host = URI.parse(inbox).host
906 digest = "SHA-256=" <> (:crypto.hash(:sha256, json) |> Base.encode64())
909 NaiveDateTime.utc_now()
910 |> Timex.format!("{WDshort}, {0D} {Mshort} {YYYY} {h24}:{m}:{s} GMT")
913 Pleroma.Web.HTTPSignatures.sign(actor, %{
915 "content-length": byte_size(json),
920 with {:ok, %{status: code}} when code in 200..299 <-
926 {"Content-Type", "application/activity+json"},
928 {"signature", signature},
932 if !Map.has_key?(params, :unreachable_since) || params[:unreachable_since],
933 do: Instances.set_reachable(inbox)
937 {_post_result, response} ->
938 unless params[:unreachable_since], do: Instances.set_unreachable(inbox)
944 # This will create a Create activity, which we need internally at the moment.
945 def fetch_object_from_id(id) do
946 if object = Object.get_cached_by_ap_id(id) do
949 with {:ok, data} <- fetch_and_contain_remote_object_from_id(id),
950 nil <- Object.normalize(data),
955 "actor" => data["actor"] || data["attributedTo"],
958 :ok <- Transmogrifier.contain_origin(id, params),
959 {:ok, activity} <- Transmogrifier.handle_incoming(params) do
960 {:ok, Object.normalize(activity)}
962 {:error, {:reject, nil}} ->
965 object = %Object{} ->
969 Logger.info("Couldn't get object via AP, trying out OStatus fetching...")
971 case OStatus.fetch_activity_from_url(id) do
972 {:ok, [activity | _]} -> {:ok, Object.normalize(activity)}
979 def fetch_and_contain_remote_object_from_id(id) do
980 Logger.info("Fetching object #{id} via AP")
982 with true <- String.starts_with?(id, "http"),
983 {:ok, %{body: body, status: code}} when code in 200..299 <-
986 [{:Accept, "application/activity+json"}]
988 {:ok, data} <- Jason.decode(body),
989 :ok <- Transmogrifier.contain_origin_from_id(id, data) do
997 # filter out broken threads
998 def contain_broken_threads(%Activity{} = activity, %User{} = user) do
999 entire_thread_visible_for_user?(activity, user)
1002 # do post-processing on a specific activity
1003 def contain_activity(%Activity{} = activity, %User{} = user) do
1004 contain_broken_threads(activity, user)
1007 # do post-processing on a timeline
1008 def contain_timeline(timeline, user) do
1010 |> Enum.filter(fn activity ->
1011 contain_activity(activity, user)