Skip notifications for statuses that contain an irreversible filtered word

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})
@@ -555,7 +570,8 @@ defmodule Pleroma.Notification do
       :follows,
       :non_followers,
       :non_follows,
-      :recently_followed
+      :recently_followed,
+      :filtered
     ]
     |> Enum.find(&skip?(&1, activity, user))
   end
@@ -624,6 +640,24 @@ defmodule Pleroma.Notification do
     end)
   end
 
+  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