1 # Pleroma: A lightweight social networking server
2 # Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
3 # SPDX-License-Identifier: AGPL-3.0-only
5 defmodule Pleroma.Web.ActivityPub.ObjectValidator do
7 This module is responsible for validating an object (which can be an activity)
8 and checking if it is both well formed and also compatible with our view of
12 @behaviour Pleroma.Web.ActivityPub.ObjectValidator.Validating
14 alias Pleroma.Activity
15 alias Pleroma.EctoType.ActivityPub.ObjectValidators
17 alias Pleroma.Object.Containment
19 alias Pleroma.Web.ActivityPub.ObjectValidators.AcceptRejectValidator
20 alias Pleroma.Web.ActivityPub.ObjectValidators.AddRemoveValidator
21 alias Pleroma.Web.ActivityPub.ObjectValidators.AnnounceValidator
22 alias Pleroma.Web.ActivityPub.ObjectValidators.AnswerValidator
23 alias Pleroma.Web.ActivityPub.ObjectValidators.ArticleNotePageValidator
24 alias Pleroma.Web.ActivityPub.ObjectValidators.AudioVideoValidator
25 alias Pleroma.Web.ActivityPub.ObjectValidators.BlockValidator
26 alias Pleroma.Web.ActivityPub.ObjectValidators.CreateGenericValidator
27 alias Pleroma.Web.ActivityPub.ObjectValidators.DeleteValidator
28 alias Pleroma.Web.ActivityPub.ObjectValidators.EmojiReactValidator
29 alias Pleroma.Web.ActivityPub.ObjectValidators.EventValidator
30 alias Pleroma.Web.ActivityPub.ObjectValidators.FollowValidator
31 alias Pleroma.Web.ActivityPub.ObjectValidators.LikeValidator
32 alias Pleroma.Web.ActivityPub.ObjectValidators.QuestionValidator
33 alias Pleroma.Web.ActivityPub.ObjectValidators.UndoValidator
34 alias Pleroma.Web.ActivityPub.ObjectValidators.UpdateValidator
37 def validate(object, meta)
39 def validate(%{"type" => "Block"} = block_activity, meta) do
40 with {:ok, block_activity} <-
42 |> BlockValidator.cast_and_validate()
43 |> Ecto.Changeset.apply_action(:insert) do
44 block_activity = stringify_keys(block_activity)
45 outgoing_blocks = Pleroma.Config.get([:activitypub, :outgoing_blocks])
48 if !outgoing_blocks do
49 Keyword.put(meta, :do_not_federate, true)
54 {:ok, block_activity, meta}
58 def validate(%{"type" => "Undo"} = object, meta) do
61 |> UndoValidator.cast_and_validate()
62 |> Ecto.Changeset.apply_action(:insert) do
63 object = stringify_keys(object)
64 undone_object = Activity.get_by_ap_id(object["object"])
68 |> Keyword.put(:object_data, undone_object.data)
74 def validate(%{"type" => "Delete"} = object, meta) do
75 with cng <- DeleteValidator.cast_and_validate(object),
76 do_not_federate <- DeleteValidator.do_not_federate?(cng),
77 {:ok, object} <- Ecto.Changeset.apply_action(cng, :insert) do
78 object = stringify_keys(object)
79 meta = Keyword.put(meta, :do_not_federate, do_not_federate)
85 %{"type" => "Create", "object" => %{"type" => objtype} = object} = create_activity,
88 when objtype in ~w[Question Answer Audio Video Event Article Note Page] do
89 with {:ok, object_data} <- cast_and_apply(object),
90 meta = Keyword.put(meta, :object_data, object_data |> stringify_keys),
91 {:ok, create_activity} <-
93 |> CreateGenericValidator.cast_and_validate(meta)
94 |> Ecto.Changeset.apply_action(:insert) do
95 create_activity = stringify_keys(create_activity)
96 {:ok, create_activity, meta}
100 def validate(%{"type" => type} = object, meta)
101 when type in ~w[Event Question Audio Video Article Note Page] do
104 "Event" -> EventValidator
105 "Question" -> QuestionValidator
106 "Audio" -> AudioVideoValidator
107 "Video" -> AudioVideoValidator
108 "Article" -> ArticleNotePageValidator
109 "Note" -> ArticleNotePageValidator
110 "Page" -> ArticleNotePageValidator
113 with {:ok, object} <-
115 |> validator.cast_and_validate()
116 |> Ecto.Changeset.apply_action(:insert) do
117 object = stringify_keys(object)
119 # Insert copy of hashtags as strings for the non-hashtag table indexing
120 tag = (object["tag"] || []) ++ Object.hashtags(%Object{data: object})
121 object = Map.put(object, "tag", tag)
127 def validate(%{"type" => type} = object, meta)
128 when type in ~w[Accept Reject Follow Update Like EmojiReact Announce
132 "Accept" -> AcceptRejectValidator
133 "Reject" -> AcceptRejectValidator
134 "Follow" -> FollowValidator
135 "Update" -> UpdateValidator
136 "Like" -> LikeValidator
137 "EmojiReact" -> EmojiReactValidator
138 "Announce" -> AnnounceValidator
139 "Answer" -> AnswerValidator
142 with {:ok, object} <-
144 |> validator.cast_and_validate()
145 |> Ecto.Changeset.apply_action(:insert) do
146 object = stringify_keys(object)
151 def validate(%{"type" => type} = object, meta) when type in ~w(Add Remove) do
152 with {:ok, object} <-
154 |> AddRemoveValidator.cast_and_validate()
155 |> Ecto.Changeset.apply_action(:insert) do
156 object = stringify_keys(object)
161 def validate(o, m), do: {:error, {:validator_not_set, {o, m}}}
163 def cast_and_apply(%{"type" => "Question"} = object) do
164 QuestionValidator.cast_and_apply(object)
167 def cast_and_apply(%{"type" => "Answer"} = object) do
168 AnswerValidator.cast_and_apply(object)
171 def cast_and_apply(%{"type" => type} = object) when type in ~w[Audio Video] do
172 AudioVideoValidator.cast_and_apply(object)
175 def cast_and_apply(%{"type" => "Event"} = object) do
176 EventValidator.cast_and_apply(object)
179 def cast_and_apply(%{"type" => type} = object) when type in ~w[Article Note Page] do
180 ArticleNotePageValidator.cast_and_apply(object)
183 def cast_and_apply(o), do: {:error, {:validator_not_set, o}}
185 # is_struct/1 appears in Elixir 1.11
186 def stringify_keys(%{__struct__: _} = object) do
192 def stringify_keys(object) when is_map(object) do
194 |> Enum.filter(fn {_, v} -> v != nil end)
195 |> Map.new(fn {key, val} -> {to_string(key), stringify_keys(val)} end)
198 def stringify_keys(object) when is_list(object) do
200 |> Enum.map(&stringify_keys/1)
203 def stringify_keys(object), do: object
205 def fetch_actor(object) do
206 with actor <- Containment.get_actor(object),
207 {:ok, actor} <- ObjectValidators.ObjectID.cast(actor) do
208 User.get_or_fetch_by_ap_id(actor)
212 def fetch_actor_and_object(object) do
214 Object.normalize(object["object"], fetch: true)