GTS: cherry-picks and collection usage (#186)

[akkoma] / lib / pleroma / web / activity_pub / object_validators / common_fixes.ex

diff --git a/lib/pleroma/web/activity_pub/object_validators/common_fixes.ex b/lib/pleroma/web/activity_pub/object_validators/common_fixes.ex
index 720213d7327de4ea019f5e1ee6fbe7796f1dae8e..6fa2bbb99cb3312fa91f2cb0fbfd0ae0ccb067fa 100644 (file)
--- a/lib/pleroma/web/activity_pub/object_validators/common_fixes.ex
+++ b/lib/pleroma/web/activity_pub/object_validators/common_fixes.ex
@@ -1,22 +1,99 @@
 # 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.ObjectValidators.CommonFixes do
+  alias Pleroma.EctoType.ActivityPub.ObjectValidators
+  alias Pleroma.Object
+  alias Pleroma.Object.Containment
+  alias Pleroma.User
   alias Pleroma.Web.ActivityPub.Utils
+  require Pleroma.Constants
 
-  # based on Pleroma.Web.ActivityPub.Utils.lazy_put_objects_defaults
-  def fix_defaults(data) do
-    %{data: %{"id" => context}, id: context_id} =
-      Utils.create_context(data["context"] || data["conversation"])
+  def cast_and_filter_recipients(message, field, follower_collection, field_fallback \\ []) do
+    {:ok, data} = ObjectValidators.Recipients.cast(message[field] || field_fallback)
+
+    data =
+      Enum.reject(data, fn x ->
+        String.ends_with?(x, "/followers") and x != follower_collection
+      end)
+
+    Map.put(message, field, data)
+  end
+
+  def fix_object_defaults(data) do
+    context = Utils.maybe_create_context(data["context"] || data["conversation"])
+
+    %User{follower_address: follower_collection} = User.get_cached_by_ap_id(data["attributedTo"])
 
     data
     |> Map.put("context", context)
-    |> Map.put("context_id", context_id)
+    |> cast_and_filter_recipients("to", follower_collection)
+    |> cast_and_filter_recipients("cc", follower_collection)
+    |> cast_and_filter_recipients("bto", follower_collection)
+    |> cast_and_filter_recipients("bcc", follower_collection)
+    |> fix_implicit_addressing(follower_collection)
+  end
+
+  def fix_activity_addressing(activity) do
+    %User{follower_address: follower_collection} = User.get_cached_by_ap_id(activity["actor"])
+
+    activity
+    |> cast_and_filter_recipients("to", follower_collection)
+    |> cast_and_filter_recipients("cc", follower_collection)
+    |> cast_and_filter_recipients("bto", follower_collection)
+    |> cast_and_filter_recipients("bcc", follower_collection)
+    |> fix_implicit_addressing(follower_collection)
+  end
+
+  def fix_actor(data) do
+    actor =
+      data
+      |> Map.put_new("actor", data["attributedTo"])
+      |> Containment.get_actor()
+
+    data
+    |> Map.put("actor", actor)
+    |> Map.put("attributedTo", actor)
   end
 
-  def fix_attribution(data) do
+  def fix_activity_context(data, %Object{data: %{"context" => object_context}}) do
     data
-    |> Map.put_new("actor", data["attributedTo"])
+    |> Map.put("context", object_context)
+  end
+
+  def fix_object_action_recipients(%{"actor" => actor} = data, %Object{data: %{"actor" => actor}}) do
+    to = ((data["to"] || []) -- [actor]) |> Enum.uniq()
+
+    Map.put(data, "to", to)
+  end
+
+  def fix_object_action_recipients(data, %Object{data: %{"actor" => actor}}) do
+    to = ((data["to"] || []) ++ [actor]) |> Enum.uniq()
+
+    Map.put(data, "to", to)
+  end
+
+  # if as:Public is addressed, then make sure the followers collection is also addressed
+  # so that the activities will be delivered to local users.
+  def fix_implicit_addressing(%{"to" => to, "cc" => cc} = object, followers_collection) do
+    recipients = to ++ cc
+
+    if followers_collection not in recipients do
+      cond do
+        Pleroma.Constants.as_public() in cc ->
+          to = to ++ [followers_collection]
+          Map.put(object, "to", to)
+
+        Pleroma.Constants.as_public() in to ->
+          cc = cc ++ [followers_collection]
+          Map.put(object, "cc", cc)
+
+        true ->
+          object
+      end
+    else
+      object
+    end
   end
 end