git.squeep.com Git - akkoma/blob - lib/pleroma/web/activity_pub/object_validators/delete_validator.ex

   1 # Pleroma: A lightweight social networking server
   2 # Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
   3 # SPDX-License-Identifier: AGPL-3.0-only
   4
   5 defmodule Pleroma.Web.ActivityPub.ObjectValidators.DeleteValidator do
   6   use Ecto.Schema
   7
   8   alias Pleroma.Activity
   9   alias Pleroma.EctoType.ActivityPub.ObjectValidators
  10   alias Pleroma.User
  11
  12   import Ecto.Changeset
  13   import Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations
  14
  15   @primary_key false
  16
  17   embedded_schema do
  18     quote do
  19       unquote do
  20         import Elixir.Pleroma.Web.ActivityPub.ObjectValidators.CommonFields
  21         message_fields()
  22         activity_fields()
  23       end
  24     end
  25
  26     field(:deleted_activity_id, ObjectValidators.ObjectID)
  27   end
  28
  29   def cast_data(data) do
  30     %__MODULE__{}
  31     |> cast(data, __schema__(:fields))
  32   end
  33
  34   def add_deleted_activity_id(cng) do
  35     object =
  36       cng
  37       |> get_field(:object)
  38
  39     with %Activity{id: id} <- Activity.get_create_by_object_ap_id(object) do
  40       cng
  41       |> put_change(:deleted_activity_id, id)
  42     else
  43       _ -> cng
  44     end
  45   end
  46
  47   @deletable_types ~w{
  48     Answer
  49     Article
  50     Audio
  51     ChatMessage
  52     Event
  53     Note
  54     Page
  55     Question
  56     Tombstone
  57     Video
  58   }
  59   defp validate_data(cng) do
  60     cng
  61     |> validate_required([:id, :type, :actor, :to, :cc, :object])
  62     |> validate_inclusion(:type, ["Delete"])
  63     |> validate_delete_actor(:actor)
  64     |> validate_modification_rights()
  65     |> validate_object_or_user_presence(allowed_types: @deletable_types)
  66     |> add_deleted_activity_id()
  67   end
  68
  69   def do_not_federate?(cng) do
  70     !same_domain?(cng)
  71   end
  72
  73   def cast_and_validate(data) do
  74     data
  75     |> cast_data
  76     |> validate_data
  77   end
  78
  79   defp validate_delete_actor(cng, field_name) do
  80     validate_change(cng, field_name, fn field_name, actor ->
  81       case User.get_cached_by_ap_id(actor) do
  82         %User{} -> []
  83         _ -> [{field_name, "can't find user"}]
  84       end
  85     end)
  86   end
  87 end