Merge branch 'develop' into media-preview-proxy

lib/pleroma/web/activity_pub/activity_pub_controller.ex

@@ -399,21 +399,30 @@ defmodule Pleroma.Web.ActivityPub.ActivityPubController do
 
   defp handle_user_activity(
          %User{} = user,
-         %{"type" => "Create", "object" => %{"type" => "Note"}} = params
+         %{"type" => "Create", "object" => %{"type" => "Note"} = object} = params
        ) do
-    object =
-      params["object"]
-      |> Map.merge(Map.take(params, ["to", "cc"]))
-      |> Map.put("attributedTo", user.ap_id())
-      |> Transmogrifier.fix_object()
+    content = if is_binary(object["content"]), do: object["content"], else: ""
+    name = if is_binary(object["name"]), do: object["name"], else: ""
+    summary = if is_binary(object["summary"]), do: object["summary"], else: ""
+    length = String.length(content <> name <> summary)
 
-    ActivityPub.create(%{
-      to: params["to"],
-      actor: user,
-      context: object["context"],
-      object: object,
-      additional: Map.take(params, ["cc"])
-    })
+    if length > Pleroma.Config.get([:instance, :limit]) do
+      {:error, dgettext("errors", "Note is over the character limit")}
+    else
+      object =
+        object
+        |> Map.merge(Map.take(params, ["to", "cc"]))
+        |> Map.put("attributedTo", user.ap_id())
+        |> Transmogrifier.fix_object()
+
+      ActivityPub.create(%{
+        to: params["to"],
+        actor: user,
+        context: object["context"],
+        object: object,
+        additional: Map.take(params, ["cc"])
+      })
+    end
   end
 
   defp handle_user_activity(%User{} = user, %{"type" => "Delete"} = params) do

lib/pleroma/web/activity_pub/mrf/force_bot_unlisted_policy.ex

@@ -0,0 +1,56 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.ActivityPub.MRF.ForceBotUnlistedPolicy do
+  alias Pleroma.User
+  @behaviour Pleroma.Web.ActivityPub.MRF
+  @moduledoc "Remove bot posts from federated timeline"
+
+  require Pleroma.Constants
+
+  defp check_by_actor_type(user), do: user.actor_type in ["Application", "Service"]
+  defp check_by_nickname(user), do: Regex.match?(~r/bot@|ebooks@/i, user.nickname)
+
+  defp check_if_bot(user), do: check_by_actor_type(user) or check_by_nickname(user)
+
+  @impl true
+  def filter(
+        %{
+          "type" => "Create",
+          "to" => to,
+          "cc" => cc,
+          "actor" => actor,
+          "object" => object
+        } = message
+      ) do
+    user = User.get_cached_by_ap_id(actor)
+    isbot = check_if_bot(user)
+
+    if isbot and Enum.member?(to, Pleroma.Constants.as_public()) do
+      to = List.delete(to, Pleroma.Constants.as_public()) ++ [user.follower_address]
+      cc = List.delete(cc, user.follower_address) ++ [Pleroma.Constants.as_public()]
+
+      object =
+        object
+        |> Map.put("to", to)
+        |> Map.put("cc", cc)
+
+      message =
+        message
+        |> Map.put("to", to)
+        |> Map.put("cc", cc)
+        |> Map.put("object", object)
+
+      {:ok, message}
+    else
+      {:ok, message}
+    end
+  end
+
+  @impl true
+  def filter(message), do: {:ok, message}
+
+  @impl true
+  def describe, do: {:ok, %{}}
+end