total rebase
[anni] / lib / pleroma / web / activity_pub / object_validators / delete_validator.ex
1 # Pleroma: A lightweight social networking server
2 # Copyright © 2017-2022 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(:messages_delete)
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