Merge branch 'feature/1392-support-irreversible-filters' into 'develop'

Updates for Feature/1392 support irreversible filters

Closes #1392

See merge request pleroma/pleroma!2186

CHANGELOG.md

@@ -21,6 +21,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Streaming: Repeats of a user's posts will no longer be pushed to the user's stream.
 - Mastodon API: Added `pleroma.metadata.fields_limits` to /api/v1/instance
 - Mastodon API: On deletion, returns the original post text.
+- Mastodon API: Add `pleroma.unread_count` to the Marker entity.
 </details>
 
 <details>
@@ -59,8 +60,9 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Mastodon API: Extended `/api/v1/instance`.
 - Mastodon API: Support for `include_types` in `/api/v1/notifications`.
 - Mastodon API: Added `/api/v1/notifications/:id/dismiss` endpoint.
-- Mastodon API: Add support for filtering replies in public and home timelines
-- Mastodon API: Support for `bot` field in `/api/v1/accounts/update_credentials`
+- Mastodon API: Add support for filtering replies in public and home timelines.
+- Mastodon API: Support for `bot` field in `/api/v1/accounts/update_credentials`.
+- Mastodon API: Support irreversible property for filters.
 - Admin API: endpoints for create/update/delete OAuth Apps.
 - Admin API: endpoint for status view.
 - OTP: Add command to reload emoji packs
@@ -215,7 +217,6 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Mastodon API: `pleroma.thread_muted` to the Status entity
 - Mastodon API: Mark the direct conversation as read for the author when they send a new direct message
 - Mastodon API, streaming: Add `pleroma.direct_conversation_id` to the `conversation` stream event payload.
-- Mastodon API: Add `pleroma.unread_count` to the Marker entity
 - Admin API: Render whole status in grouped reports
 - Mastodon API: User timelines will now respect blocks, unless you are getting the user timeline of somebody you blocked (which would be empty otherwise).
 - Mastodon API: Favoriting / Repeating a post multiple times will now return the identical response every time. Before, executing that action twice would return an error ("already favorited") on the second try.

benchmarks/load_testing/activities.ex

@@ -24,6 +24,7 @@ defmodule Pleroma.LoadTesting.Activities do
   @visibility ~w(public private direct unlisted)
   @types [
     :simple,
+    :simple_filtered,
     :emoji,
     :mentions,
     :hell_thread,
@@ -242,6 +243,15 @@ defmodule Pleroma.LoadTesting.Activities do
     insert_local_activity(visibility, group, users, "Simple status")
   end
 
+  defp insert_activity(:simple_filtered, visibility, group, users, _opts)
+       when group in @remote_groups do
+    insert_remote_activity(visibility, group, users, "Remote status which must be filtered")
+  end
+
+  defp insert_activity(:simple_filtered, visibility, group, users, _opts) do
+    insert_local_activity(visibility, group, users, "Simple status which must be filtered")
+  end
+
   defp insert_activity(:emoji, visibility, group, users, _opts)
        when group in @remote_groups do
     insert_remote_activity(visibility, group, users, "Remote status with emoji :firefox:")

benchmarks/load_testing/fetcher.ex

@@ -32,10 +32,22 @@ defmodule Pleroma.LoadTesting.Fetcher do
     )
   end
 
+  defp create_filter(user) do
+    Pleroma.Filter.create(%Pleroma.Filter{
+      user_id: user.id,
+      phrase: "must be filtered",
+      hide: true
+    })
+  end
+
+  defp delete_filter(filter), do: Repo.delete(filter)
+
   defp fetch_timelines(user) do
     fetch_home_timeline(user)
+    fetch_home_timeline_with_filter(user)
     fetch_direct_timeline(user)
     fetch_public_timeline(user)
+    fetch_public_timeline_with_filter(user)
     fetch_public_timeline(user, :with_blocks)
     fetch_public_timeline(user, :local)
     fetch_public_timeline(user, :tag)
@@ -61,7 +73,7 @@ defmodule Pleroma.LoadTesting.Fetcher do
     }
   end
 
-  defp fetch_home_timeline(user) do
+  defp fetch_home_timeline(user, title_end \\ "") do
     opts = opts_for_home_timeline(user)
 
     recipients = [user.ap_id | User.following(user)]
@@ -84,9 +96,11 @@ defmodule Pleroma.LoadTesting.Fetcher do
       |> Enum.reverse()
       |> List.last()
 
+    title = "home timeline " <> title_end
+
     Benchee.run(
       %{
-        "home timeline" => fn opts -> ActivityPub.fetch_activities(recipients, opts) end
+        title => fn opts -> ActivityPub.fetch_activities(recipients, opts) end
       },
       inputs: %{
         "1 page" => opts,
@@ -108,6 +122,14 @@ defmodule Pleroma.LoadTesting.Fetcher do
     )
   end
 
+  defp fetch_home_timeline_with_filter(user) do
+    {:ok, filter} = create_filter(user)
+
+    fetch_home_timeline(user, "with filters")
+
+    delete_filter(filter)
+  end
+
   defp opts_for_direct_timeline(user) do
     %{
       visibility: "direct",
@@ -210,6 +232,14 @@ defmodule Pleroma.LoadTesting.Fetcher do
     fetch_public_timeline(opts, "public timeline")
   end
 
+  defp fetch_public_timeline_with_filter(user) do
+    {:ok, filter} = create_filter(user)
+    opts = opts_for_public_timeline(user)
+
+    fetch_public_timeline(opts, "public timeline with filters")
+    delete_filter(filter)
+  end
+
   defp fetch_public_timeline(user, :local) do
     opts = opts_for_public_timeline(user, :local)
 

lib/pleroma/filter.ex

@@ -34,10 +34,18 @@ defmodule Pleroma.Filter do
     Repo.one(query)
   end
 
-  def get_filters(%User{id: user_id} = _user) do
+  def get_active(query) do
+    from(f in query, where: is_nil(f.expires_at) or f.expires_at > ^NaiveDateTime.utc_now())
+  end
+
+  def get_irreversible(query) do
+    from(f in query, where: f.hide)
+  end
+
+  def get_filters(query \\ __MODULE__, %User{id: user_id}) do
     query =
       from(
-        f in Pleroma.Filter,
+        f in query,
         where: f.user_id == ^user_id,
         order_by: [desc: :id]
       )
@@ -95,4 +103,34 @@ defmodule Pleroma.Filter do
     |> validate_required([:phrase, :context])
     |> Repo.update()
   end
+
+  def compose_regex(user_or_filters, format \\ :postgres)
+
+  def compose_regex(%User{} = user, format) do
+    __MODULE__
+    |> get_active()
+    |> get_irreversible()
+    |> get_filters(user)
+    |> compose_regex(format)
+  end
+
+  def compose_regex([_ | _] = filters, format) do
+    phrases =
+      filters
+      |> Enum.map(& &1.phrase)
+      |> Enum.join("|")
+
+    case format do
+      :postgres ->
+        "\\y(#{phrases})\\y"
+
+      :re ->
+        ~r/\b#{phrases}\b/i
+
+      _ ->
+        nil
+    end
+  end
+
+  def compose_regex(_, _), do: nil
 end

lib/pleroma/notification.ex

@@ -130,6 +130,7 @@ defmodule Pleroma.Notification do
     |> preload([n, a, o], activity: {a, object: o})
     |> exclude_notification_muted(user, exclude_notification_muted_opts)
     |> exclude_blocked(user, exclude_blocked_opts)
+    |> exclude_filtered(user)
     |> exclude_visibility(opts)
   end
 
@@ -158,6 +159,20 @@ defmodule Pleroma.Notification do
     |> where([n, a, o, tm], is_nil(tm.user_id))
   end
 
+  defp exclude_filtered(query, user) do
+    case Pleroma.Filter.compose_regex(user) do
+      nil ->
+        query
+
+      regex ->
+        from([_n, a, o] in query,
+          where:
+            fragment("not(?->>'content' ~* ?)", o.data, ^regex) or
+              fragment("?->>'actor' = ?", o.data, ^user.ap_id)
+        )
+    end
+  end
+
   @valid_visibilities ~w[direct unlisted public private]
 
   defp exclude_visibility(query, %{exclude_visibilities: visibility})
@@ -337,6 +352,7 @@ defmodule Pleroma.Notification do
     end
   end
 
+  @spec create_notifications(Activity.t(), keyword()) :: {:ok, [Notification.t()] | []}
   def create_notifications(activity, options \\ [])
 
   def create_notifications(%Activity{data: %{"to" => _, "type" => "Create"}} = activity, options) do
@@ -555,7 +571,8 @@ defmodule Pleroma.Notification do
       :follows,
       :non_followers,
       :non_follows,
-      :recently_followed
+      :recently_followed,
+      :filtered
     ]
     |> Enum.find(&skip?(&1, activity, user))
   end
@@ -624,6 +641,26 @@ defmodule Pleroma.Notification do
     end)
   end
 
+  def skip?(:filtered, %{data: %{"type" => type}}, _) when type in ["Follow", "Move"], do: false
+
+  def skip?(:filtered, activity, user) do
+    object = Object.normalize(activity)
+
+    cond do
+      is_nil(object) ->
+        false
+
+      object.data["actor"] == user.ap_id ->
+        false
+
+      not is_nil(regex = Pleroma.Filter.compose_regex(user, :re)) ->
+        Regex.match?(regex, object.data["content"])
+
+      true ->
+        false
+    end
+  end
+
   def skip?(_, _, _), do: false
 
   def for_user_and_activity(user, activity) do

lib/pleroma/web/activity_pub/activity_pub.ex

@@ -10,6 +10,7 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
   alias Pleroma.Constants
   alias Pleroma.Conversation
   alias Pleroma.Conversation.Participation
+  alias Pleroma.Filter
   alias Pleroma.Maps
   alias Pleroma.Notification
   alias Pleroma.Object
@@ -446,6 +447,7 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
     |> maybe_set_thread_muted_field(opts)
     |> restrict_blocked(opts)
     |> restrict_recipients(recipients, opts[:user])
+    |> restrict_filtered(opts)
     |> where(
       [activity],
       fragment(
@@ -961,6 +963,26 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
 
   defp restrict_instance(query, _), do: query
 
+  defp restrict_filtered(query, %{user: %User{} = user}) do
+    case Filter.compose_regex(user) do
+      nil ->
+        query
+
+      regex ->
+        from([activity, object] in query,
+          where:
+            fragment("not(?->>'content' ~* ?)", object.data, ^regex) or
+              activity.actor == ^user.ap_id
+        )
+    end
+  end
+
+  defp restrict_filtered(query, %{blocking_user: %User{} = user}) do
+    restrict_filtered(query, %{user: user})
+  end
+
+  defp restrict_filtered(query, _), do: query
+
   defp exclude_poll_votes(query, %{include_poll_votes: true}), do: query
 
   defp exclude_poll_votes(query, _) do
@@ -1091,6 +1113,7 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
     |> restrict_favorited_by(opts)
     |> restrict_blocked(restrict_blocked_opts)
     |> restrict_muted(restrict_muted_opts)
+    |> restrict_filtered(opts)
     |> restrict_media(opts)
     |> restrict_visibility(opts)
     |> restrict_thread_visibility(opts, config)
@@ -1099,6 +1122,7 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
     |> restrict_muted_reblogs(restrict_muted_reblogs_opts)
     |> restrict_instance(opts)
     |> restrict_announce_object_actor(opts)
+    |> restrict_filtered(opts)
     |> Activity.restrict_deactivated_users()
     |> exclude_poll_votes(opts)
     |> exclude_chat_messages(opts)

test/filter_test.exs

@@ -3,37 +3,39 @@
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.FilterTest do
-  alias Pleroma.Repo
   use Pleroma.DataCase
 
   import Pleroma.Factory
 
+  alias Pleroma.Filter
+  alias Pleroma.Repo
+
   describe "creating filters" do
     test "creating one filter" do
       user = insert(:user)
 
-      query = %Pleroma.Filter{
+      query = %Filter{
         user_id: user.id,
         filter_id: 42,
         phrase: "knights",
         context: ["home"]
       }
 
-      {:ok, %Pleroma.Filter{} = filter} = Pleroma.Filter.create(query)
-      result = Pleroma.Filter.get(filter.filter_id, user)
+      {:ok, %Filter{} = filter} = Filter.create(query)
+      result = Filter.get(filter.filter_id, user)
       assert query.phrase == result.phrase
     end
 
     test "creating one filter without a pre-defined filter_id" do
       user = insert(:user)
 
-      query = %Pleroma.Filter{
+      query = %Filter{
         user_id: user.id,
         phrase: "knights",
         context: ["home"]
       }
 
-      {:ok, %Pleroma.Filter{} = filter} = Pleroma.Filter.create(query)
+      {:ok, %Filter{} = filter} = Filter.create(query)
       # Should start at 1
       assert filter.filter_id == 1
     end
@@ -41,23 +43,23 @@ defmodule Pleroma.FilterTest do
     test "creating additional filters uses previous highest filter_id + 1" do
       user = insert(:user)
 
-      query_one = %Pleroma.Filter{
+      query_one = %Filter{
         user_id: user.id,
         filter_id: 42,
         phrase: "knights",
         context: ["home"]
       }
 
-      {:ok, %Pleroma.Filter{} = filter_one} = Pleroma.Filter.create(query_one)
+      {:ok, %Filter{} = filter_one} = Filter.create(query_one)
 
-      query_two = %Pleroma.Filter{
+      query_two = %Filter{
         user_id: user.id,
         # No filter_id
         phrase: "who",
         context: ["home"]
       }
 
-      {:ok, %Pleroma.Filter{} = filter_two} = Pleroma.Filter.create(query_two)
+      {:ok, %Filter{} = filter_two} = Filter.create(query_two)
       assert filter_two.filter_id == filter_one.filter_id + 1
     end
 
@@ -65,29 +67,29 @@ defmodule Pleroma.FilterTest do
       user_one = insert(:user)
       user_two = insert(:user)
 
-      query_one = %Pleroma.Filter{
+      query_one = %Filter{
         user_id: user_one.id,
         phrase: "knights",
         context: ["home"]
       }
 
-      {:ok, %Pleroma.Filter{} = filter_one} = Pleroma.Filter.create(query_one)
+      {:ok, %Filter{} = filter_one} = Filter.create(query_one)
 
-      query_two = %Pleroma.Filter{
+      query_two = %Filter{
         user_id: user_two.id,
         phrase: "who",
         context: ["home"]
       }
 
-      {:ok, %Pleroma.Filter{} = filter_two} = Pleroma.Filter.create(query_two)
+      {:ok, %Filter{} = filter_two} = Filter.create(query_two)
 
       assert filter_one.filter_id == 1
       assert filter_two.filter_id == 1
 
-      result_one = Pleroma.Filter.get(filter_one.filter_id, user_one)
+      result_one = Filter.get(filter_one.filter_id, user_one)
       assert result_one.phrase == filter_one.phrase
 
-      result_two = Pleroma.Filter.get(filter_two.filter_id, user_two)
+      result_two = Filter.get(filter_two.filter_id, user_two)
       assert result_two.phrase == filter_two.phrase
     end
   end
@@ -95,38 +97,38 @@ defmodule Pleroma.FilterTest do
   test "deleting a filter" do
     user = insert(:user)
 
-    query = %Pleroma.Filter{
+    query = %Filter{
       user_id: user.id,
       filter_id: 0,
       phrase: "knights",
       context: ["home"]
     }
 
-    {:ok, _filter} = Pleroma.Filter.create(query)
-    {:ok, filter} = Pleroma.Filter.delete(query)
-    assert is_nil(Repo.get(Pleroma.Filter, filter.filter_id))
+    {:ok, _filter} = Filter.create(query)
+    {:ok, filter} = Filter.delete(query)
+    assert is_nil(Repo.get(Filter, filter.filter_id))
   end
 
   test "getting all filters by an user" do
     user = insert(:user)
 
-    query_one = %Pleroma.Filter{
+    query_one = %Filter{
       user_id: user.id,
       filter_id: 1,
       phrase: "knights",
       context: ["home"]
     }
 
-    query_two = %Pleroma.Filter{
+    query_two = %Filter{
       user_id: user.id,
       filter_id: 2,
       phrase: "who",
       context: ["home"]
     }
 
-    {:ok, filter_one} = Pleroma.Filter.create(query_one)
-    {:ok, filter_two} = Pleroma.Filter.create(query_two)
-    filters = Pleroma.Filter.get_filters(user)
+    {:ok, filter_one} = Filter.create(query_one)
+    {:ok, filter_two} = Filter.create(query_two)
+    filters = Filter.get_filters(user)
     assert filter_one in filters
     assert filter_two in filters
   end
@@ -134,7 +136,7 @@ defmodule Pleroma.FilterTest do
   test "updating a filter" do
     user = insert(:user)
 
-    query_one = %Pleroma.Filter{
+    query_one = %Filter{
       user_id: user.id,
       filter_id: 1,
       phrase: "knights",
@@ -146,8 +148,9 @@ defmodule Pleroma.FilterTest do
       context: ["home", "timeline"]
     }
 
-    {:ok, filter_one} = Pleroma.Filter.create(query_one)
-    {:ok, filter_two} = Pleroma.Filter.update(filter_one, changes)
+    {:ok, filter_one} = Filter.create(query_one)
+    {:ok, filter_two} = Filter.update(filter_one, changes)
+
     assert filter_one != filter_two
     assert filter_two.phrase == changes.phrase
     assert filter_two.context == changes.context

test/notification_test.exs

@@ -324,6 +324,44 @@ defmodule Pleroma.NotificationTest do
       {:ok, status} = CommonAPI.post(author, %{status: "hey @#{user.nickname}"})
       refute Notification.create_notification(status, user)
     end
+
+    test "it doesn't create notifications if content matches with an irreversible filter" do
+      user = insert(:user)
+      subscriber = insert(:user)
+
+      User.subscribe(subscriber, user)
+      insert(:filter, user: subscriber, phrase: "cofe", hide: true)
+
+      {:ok, status} = CommonAPI.post(user, %{status: "got cofe?"})
+
+      assert {:ok, []} == Notification.create_notifications(status)
+    end
+
+    test "it creates notifications if content matches with a not irreversible filter" do
+      user = insert(:user)
+      subscriber = insert(:user)
+
+      User.subscribe(subscriber, user)
+      insert(:filter, user: subscriber, phrase: "cofe", hide: false)
+
+      {:ok, status} = CommonAPI.post(user, %{status: "got cofe?"})
+      {:ok, [notification]} = Notification.create_notifications(status)
+
+      assert notification
+    end
+
+    test "it creates notifications when someone likes user's status with a filtered word" do
+      user = insert(:user)
+      other_user = insert(:user)
+      insert(:filter, user: user, phrase: "tesla", hide: true)
+
+      {:ok, activity_one} = CommonAPI.post(user, %{status: "wow tesla"})
+      {:ok, activity_two} = CommonAPI.favorite(other_user, activity_one.id)
+
+      {:ok, [notification]} = Notification.create_notifications(activity_two)
+
+      assert notification
+    end
   end
 
   describe "follow / follow_request notifications" do
@@ -990,8 +1028,13 @@ defmodule Pleroma.NotificationTest do
   end
 
   describe "for_user" do
-    test "it returns notifications for muted user without notifications" do
+    setup do
       user = insert(:user)
+
+      {:ok, %{user: user}}
+    end
+
+    test "it returns notifications for muted user without notifications", %{user: user} do
       muted = insert(:user)
       {:ok, _user_relationships} = User.mute(user, muted, false)
 
@@ -1002,8 +1045,7 @@ defmodule Pleroma.NotificationTest do
       assert notification.activity.object
     end
 
-    test "it doesn't return notifications for muted user with notifications" do
-      user = insert(:user)
+    test "it doesn't return notifications for muted user with notifications", %{user: user} do
       muted = insert(:user)
       {:ok, _user_relationships} = User.mute(user, muted)
 
@@ -1012,8 +1054,7 @@ defmodule Pleroma.NotificationTest do
       assert Notification.for_user(user) == []
     end
 
-    test "it doesn't return notifications for blocked user" do
-      user = insert(:user)
+    test "it doesn't return notifications for blocked user", %{user: user} do
       blocked = insert(:user)
       {:ok, _user_relationship} = User.block(user, blocked)
 
@@ -1022,8 +1063,7 @@ defmodule Pleroma.NotificationTest do
       assert Notification.for_user(user) == []
     end
 
-    test "it doesn't return notifications for domain-blocked non-followed user" do
-      user = insert(:user)
+    test "it doesn't return notifications for domain-blocked non-followed user", %{user: user} do
       blocked = insert(:user, ap_id: "http://some-domain.com")
       {:ok, user} = User.block_domain(user, "some-domain.com")
 
@@ -1044,8 +1084,7 @@ defmodule Pleroma.NotificationTest do
       assert length(Notification.for_user(user)) == 1
     end
 
-    test "it doesn't return notifications for muted thread" do
-      user = insert(:user)
+    test "it doesn't return notifications for muted thread", %{user: user} do
       another_user = insert(:user)
 
       {:ok, activity} = CommonAPI.post(another_user, %{status: "hey @#{user.nickname}"})
@@ -1054,8 +1093,7 @@ defmodule Pleroma.NotificationTest do
       assert Notification.for_user(user) == []
     end
 
-    test "it returns notifications from a muted user when with_muted is set" do
-      user = insert(:user)
+    test "it returns notifications from a muted user when with_muted is set", %{user: user} do
       muted = insert(:user)
       {:ok, _user_relationships} = User.mute(user, muted)
 
@@ -1064,8 +1102,9 @@ defmodule Pleroma.NotificationTest do
       assert length(Notification.for_user(user, %{with_muted: true})) == 1
     end
 
-    test "it doesn't return notifications from a blocked user when with_muted is set" do
-      user = insert(:user)
+    test "it doesn't return notifications from a blocked user when with_muted is set", %{
+      user: user
+    } do
       blocked = insert(:user)
       {:ok, _user_relationship} = User.block(user, blocked)
 
@@ -1075,8 +1114,8 @@ defmodule Pleroma.NotificationTest do
     end
 
     test "when with_muted is set, " <>
-           "it doesn't return notifications from a domain-blocked non-followed user" do
-      user = insert(:user)
+           "it doesn't return notifications from a domain-blocked non-followed user",
+         %{user: user} do
       blocked = insert(:user, ap_id: "http://some-domain.com")
       {:ok, user} = User.block_domain(user, "some-domain.com")
 
@@ -1085,8 +1124,7 @@ defmodule Pleroma.NotificationTest do
       assert Enum.empty?(Notification.for_user(user, %{with_muted: true}))
     end
 
-    test "it returns notifications from muted threads when with_muted is set" do
-      user = insert(:user)
+    test "it returns notifications from muted threads when with_muted is set", %{user: user} do
       another_user = insert(:user)
 
       {:ok, activity} = CommonAPI.post(another_user, %{status: "hey @#{user.nickname}"})
@@ -1094,5 +1132,33 @@ defmodule Pleroma.NotificationTest do
       {:ok, _} = Pleroma.ThreadMute.add_mute(user.id, activity.data["context"])
       assert length(Notification.for_user(user, %{with_muted: true})) == 1
     end
+
+    test "it doesn't return notifications about mentions with filtered word", %{user: user} do
+      insert(:filter, user: user, phrase: "cofe", hide: true)
+      another_user = insert(:user)
+
+      {:ok, _activity} = CommonAPI.post(another_user, %{status: "@#{user.nickname} got cofe?"})
+
+      assert Enum.empty?(Notification.for_user(user))
+    end
+
+    test "it returns notifications about mentions with not hidden filtered word", %{user: user} do
+      insert(:filter, user: user, phrase: "test", hide: false)
+      another_user = insert(:user)
+
+      {:ok, _} = CommonAPI.post(another_user, %{status: "@#{user.nickname} test"})
+
+      assert length(Notification.for_user(user)) == 1
+    end
+
+    test "it returns notifications about favorites with filtered word", %{user: user} do
+      insert(:filter, user: user, phrase: "cofe", hide: true)
+      another_user = insert(:user)
+
+      {:ok, activity} = CommonAPI.post(user, %{status: "Give me my cofe!"})
+      {:ok, _} = CommonAPI.favorite(another_user, activity.id)
+
+      assert length(Notification.for_user(user)) == 1
+    end
   end
 end

test/support/factory.ex

@@ -428,4 +428,12 @@ defmodule Pleroma.Factory do
       user: build(:user)
     }
   end
+
+  def filter_factory do
+    %Pleroma.Filter{
+      user: build(:user),
+      filter_id: sequence(:filter_id, & &1),
+      phrase: "cofe"
+    }
+  end
 end

test/web/activity_pub/activity_pub_test.exs

@@ -507,6 +507,33 @@ defmodule Pleroma.Web.ActivityPub.ActivityPubTest do
       activities = ActivityPub.fetch_activities_for_context("2hu", %{blocking_user: user})
       assert activities == [activity_two, activity]
     end
+
+    test "doesn't return activities with filtered words" do
+      user = insert(:user)
+      user_two = insert(:user)
+      insert(:filter, user: user, phrase: "test", hide: true)
+
+      {:ok, %{id: id1, data: %{"context" => context}}} = CommonAPI.post(user, %{status: "1"})
+
+      {:ok, %{id: id2}} = CommonAPI.post(user_two, %{status: "2", in_reply_to_status_id: id1})
+
+      {:ok, %{id: id3} = user_activity} =
+        CommonAPI.post(user, %{status: "3 test?", in_reply_to_status_id: id2})
+
+      {:ok, %{id: id4} = filtered_activity} =
+        CommonAPI.post(user_two, %{status: "4 test!", in_reply_to_status_id: id3})
+
+      {:ok, _} = CommonAPI.post(user, %{status: "5", in_reply_to_status_id: id4})
+
+      activities =
+        context
+        |> ActivityPub.fetch_activities_for_context(%{user: user})
+        |> Enum.map(& &1.id)
+
+      assert length(activities) == 4
+      assert user_activity.id in activities
+      refute filtered_activity.id in activities
+    end
   end
 
   test "doesn't return blocked activities" do
@@ -785,6 +812,75 @@ defmodule Pleroma.Web.ActivityPub.ActivityPubTest do
     assert activity == expected_activity
   end
 
+  describe "irreversible filters" do
+    setup do
+      user = insert(:user)
+      user_two = insert(:user)
+
+      insert(:filter, user: user_two, phrase: "cofe", hide: true)
+      insert(:filter, user: user_two, phrase: "ok boomer", hide: true)
+      insert(:filter, user: user_two, phrase: "test", hide: false)
+
+      params = %{
+        type: ["Create", "Announce"],
+        user: user_two
+      }
+
+      {:ok, %{user: user, user_two: user_two, params: params}}
+    end
+
+    test "it returns statuses if they don't contain exact filter words", %{
+      user: user,
+      params: params
+    } do
+      {:ok, _} = CommonAPI.post(user, %{status: "hey"})
+      {:ok, _} = CommonAPI.post(user, %{status: "got cofefe?"})
+      {:ok, _} = CommonAPI.post(user, %{status: "I am not a boomer"})
+      {:ok, _} = CommonAPI.post(user, %{status: "ok boomers"})
+      {:ok, _} = CommonAPI.post(user, %{status: "ccofee is not a word"})
+      {:ok, _} = CommonAPI.post(user, %{status: "this is a test"})
+
+      activities = ActivityPub.fetch_activities([], params)
+
+      assert Enum.count(activities) == 6
+    end
+
+    test "it does not filter user's own statuses", %{user_two: user_two, params: params} do
+      {:ok, _} = CommonAPI.post(user_two, %{status: "Give me some cofe!"})
+      {:ok, _} = CommonAPI.post(user_two, %{status: "ok boomer"})
+
+      activities = ActivityPub.fetch_activities([], params)
+
+      assert Enum.count(activities) == 2
+    end
+
+    test "it excludes statuses with filter words", %{user: user, params: params} do
+      {:ok, _} = CommonAPI.post(user, %{status: "Give me some cofe!"})
+      {:ok, _} = CommonAPI.post(user, %{status: "ok boomer"})
+      {:ok, _} = CommonAPI.post(user, %{status: "is it a cOfE?"})
+      {:ok, _} = CommonAPI.post(user, %{status: "cofe is all I need"})
+      {:ok, _} = CommonAPI.post(user, %{status: "— ok BOOMER\n"})
+
+      activities = ActivityPub.fetch_activities([], params)
+
+      assert Enum.empty?(activities)
+    end
+
+    test "it returns all statuses if user does not have any filters" do
+      another_user = insert(:user)
+      {:ok, _} = CommonAPI.post(another_user, %{status: "got cofe?"})
+      {:ok, _} = CommonAPI.post(another_user, %{status: "test!"})
+
+      activities =
+        ActivityPub.fetch_activities([], %{
+          type: ["Create", "Announce"],
+          user: another_user
+        })
+
+      assert Enum.count(activities) == 2
+    end
+  end
+
   describe "public fetch activities" do
     test "doesn't retrieve unlisted activities" do
       user = insert(:user)