defmodule Pleroma.Web.ActivityPub.ObjectValidators.ChatMessageValidator do
use Ecto.Schema
+ alias Pleroma.User
alias Pleroma.Web.ActivityPub.ObjectValidators.Types
import Ecto.Changeset
data_cng
|> validate_inclusion(:type, ["ChatMessage"])
|> validate_required([:id, :actor, :to, :type, :content])
+ |> validate_length(:to, is: 1)
+ |> validate_length(:content, max: Pleroma.Config.get([:instance, :remote_limit]))
+ |> validate_local_concern()
+ end
+
+ @doc "Validates if at least one of the users in this ChatMessage is a local user, otherwise we don't want the message in our system. It also validates the presence of both users in our system."
+ def validate_local_concern(cng) do
+ with actor_ap <- get_field(cng, :actor),
+ {_, %User{} = actor} <- {:find_actor, User.get_cached_by_ap_id(actor_ap)},
+ {_, %User{} = recipient} <-
+ {:find_recipient, User.get_cached_by_ap_id(get_field(cng, :to) |> hd())},
+ {_, true} <- {:local?, Enum.any?([actor, recipient], & &1.local)} do
+ cng
+ else
+ {:local?, false} ->
+ cng
+ |> add_error(:actor, "actor and recipient are both remote")
+
+ {:find_actor, _} ->
+ cng
+ |> add_error(:actor, "can't find user")
+
+ {:find_recipient, _} ->
+ cng
+ |> add_error(:to, "can't find user")
+ end
end
end