extend reject MRF to check if originating instance is blocked

[akkoma] / lib / pleroma / web / activity_pub / visibility.ex

diff --git a/lib/pleroma/web/activity_pub/visibility.ex b/lib/pleroma/web/activity_pub/visibility.ex
index 1a0c9a46c1c62b26c9addd9a2e868b48bc4733b2..02d4e195a030c9a00ffaa31027995f57ab9d440a 100644 (file)
--- a/lib/pleroma/web/activity_pub/visibility.ex
+++ b/lib/pleroma/web/activity_pub/visibility.ex
@@ -1,5 +1,5 @@
 # Pleroma: A lightweight social networking server
-# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Web.ActivityPub.Visibility do
@@ -20,7 +20,15 @@ defmodule Pleroma.Web.ActivityPub.Visibility do
 
   def is_public?(data) do
     Utils.label_in_message?(Pleroma.Constants.as_public(), data) or
-      Utils.label_in_message?(Pleroma.Constants.as_local_public(), data)
+      Utils.label_in_message?(Utils.as_local_public(), data)
+  end
+
+  def is_local_public?(%Object{data: data}), do: is_local_public?(data)
+  def is_local_public?(%Activity{data: data}), do: is_local_public?(data)
+
+  def is_local_public?(data) do
+    Utils.label_in_message?(Utils.as_local_public(), data) and
+      not Utils.label_in_message?(Pleroma.Constants.as_public(), data)
   end
 
   def is_private?(activity) do
@@ -48,32 +56,38 @@ defmodule Pleroma.Web.ActivityPub.Visibility do
   def is_list?(%{data: %{"listMessage" => _}}), do: true
   def is_list?(_), do: false
 
-  @spec visible_for_user?(Activity.t(), User.t() | nil) :: boolean()
-  def visible_for_user?(%{actor: ap_id}, %User{ap_id: ap_id}), do: true
-
+  @spec visible_for_user?(Object.t() | Activity.t() | nil, User.t() | nil) :: boolean()
+  def visible_for_user?(%Object{data: %{"type" => "Tombstone"}}, _), do: false
+  def visible_for_user?(%Activity{actor: ap_id}, %User{ap_id: ap_id}), do: true
+  def visible_for_user?(%Object{data: %{"actor" => ap_id}}, %User{ap_id: ap_id}), do: true
   def visible_for_user?(nil, _), do: false
+  def visible_for_user?(%Activity{data: %{"listMessage" => _}}, nil), do: false
 
-  def visible_for_user?(%{data: %{"listMessage" => _}}, nil), do: false
-
-  def visible_for_user?(%{data: %{"listMessage" => list_ap_id}} = activity, %User{} = user) do
+  def visible_for_user?(
+        %Activity{data: %{"listMessage" => list_ap_id}} = activity,
+        %User{} = user
+      ) do
     user.ap_id in activity.data["to"] ||
       list_ap_id
       |> Pleroma.List.get_by_ap_id()
       |> Pleroma.List.member?(user)
   end
 
-  def visible_for_user?(%{local: local} = activity, nil) do
-    cfg_key = if local, do: :local, else: :remote
-
-    if Pleroma.Config.restrict_unauthenticated_access?(:activities, cfg_key),
+  def visible_for_user?(%{__struct__: module} = message, nil)
+      when module in [Activity, Object] do
+    if restrict_unauthenticated_access?(message),
       do: false,
-      else: is_public?(activity)
+      else: is_public?(message) and not is_local_public?(message)
   end
 
-  def visible_for_user?(activity, user) do
+  def visible_for_user?(%{__struct__: module} = message, user)
+      when module in [Activity, Object] do
     x = [user.ap_id | User.following(user)]
-    y = [activity.actor] ++ activity.data["to"] ++ (activity.data["cc"] || [])
-    is_public?(activity) || Enum.any?(x, &(&1 in y))
+    y = [message.data["actor"]] ++ message.data["to"] ++ (message.data["cc"] || [])
+
+    user_is_local = user.local
+    federatable = not is_local_public?(message)
+    (is_public?(message) || Enum.any?(x, &(&1 in y))) and (user_is_local || federatable)
   end
 
   def entire_thread_visible_for_user?(%Activity{} = activity, %User{} = user) do
@@ -86,6 +100,26 @@ defmodule Pleroma.Web.ActivityPub.Visibility do
     result
   end
 
+  def restrict_unauthenticated_access?(%Activity{local: local}) do
+    restrict_unauthenticated_access_to_activity?(local)
+  end
+
+  def restrict_unauthenticated_access?(%Object{} = object) do
+    object
+    |> Object.local?()
+    |> restrict_unauthenticated_access_to_activity?()
+  end
+
+  def restrict_unauthenticated_access?(%User{} = user) do
+    User.visible_for(user, _reading_user = nil)
+  end
+
+  defp restrict_unauthenticated_access_to_activity?(local?) when is_boolean(local?) do
+    cfg_key = if local?, do: :local, else: :remote
+
+    Pleroma.Config.restrict_unauthenticated_access?(:activities, cfg_key)
+  end
+
   def get_visibility(object) do
     to = object.data["to"] || []
     cc = object.data["cc"] || []
@@ -97,6 +131,9 @@ defmodule Pleroma.Web.ActivityPub.Visibility do
       Pleroma.Constants.as_public() in cc ->
         "unlisted"
 
+      Utils.as_local_public() in to ->
+        "local"
+
       # this should use the sql for the object's activity
       Enum.any?(to, &String.contains?(&1, "/followers")) ->
         "private"