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

   1 # Pleroma: A lightweight social networking server
   2 # Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
   3 # SPDX-License-Identifier: AGPL-3.0-only
   4
   5 defmodule Pleroma.Web.ActivityPub.ObjectValidator do
   6   @moduledoc """
   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
   9   the system.
  10   """
  11
  12   alias Pleroma.Activity
  13   alias Pleroma.EctoType.ActivityPub.ObjectValidators
  14   alias Pleroma.Object
  15   alias Pleroma.User
  16   alias Pleroma.Web.ActivityPub.ObjectValidators.AcceptRejectValidator
  17   alias Pleroma.Web.ActivityPub.ObjectValidators.AnnounceValidator
  18   alias Pleroma.Web.ActivityPub.ObjectValidators.AnswerValidator
  19   alias Pleroma.Web.ActivityPub.ObjectValidators.AudioValidator
  20   alias Pleroma.Web.ActivityPub.ObjectValidators.BlockValidator
  21   alias Pleroma.Web.ActivityPub.ObjectValidators.ChatMessageValidator
  22   alias Pleroma.Web.ActivityPub.ObjectValidators.CreateChatMessageValidator
  23   alias Pleroma.Web.ActivityPub.ObjectValidators.CreateGenericValidator
  24   alias Pleroma.Web.ActivityPub.ObjectValidators.DeleteValidator
  25   alias Pleroma.Web.ActivityPub.ObjectValidators.EmojiReactValidator
  26   alias Pleroma.Web.ActivityPub.ObjectValidators.EventValidator
  27   alias Pleroma.Web.ActivityPub.ObjectValidators.FollowValidator
  28   alias Pleroma.Web.ActivityPub.ObjectValidators.LikeValidator
  29   alias Pleroma.Web.ActivityPub.ObjectValidators.QuestionValidator
  30   alias Pleroma.Web.ActivityPub.ObjectValidators.UndoValidator
  31   alias Pleroma.Web.ActivityPub.ObjectValidators.UpdateValidator
  32
  33   @spec validate(map(), keyword()) :: {:ok, map(), keyword()} | {:error, any()}
  34   def validate(object, meta)
  35
  36   def validate(%{"type" => type} = object, meta)
  37       when type in ~w[Accept Reject] do
  38     with {:ok, object} <-
  39            object
  40            |> AcceptRejectValidator.cast_and_validate()
  41            |> Ecto.Changeset.apply_action(:insert) do
  42       object = stringify_keys(object)
  43       {:ok, object, meta}
  44     end
  45   end
  46
  47   def validate(%{"type" => "Event"} = object, meta) do
  48     with {:ok, object} <-
  49            object
  50            |> EventValidator.cast_and_validate()
  51            |> Ecto.Changeset.apply_action(:insert) do
  52       object = stringify_keys(object)
  53       {:ok, object, meta}
  54     end
  55   end
  56
  57   def validate(%{"type" => "Follow"} = object, meta) do
  58     with {:ok, object} <-
  59            object
  60            |> FollowValidator.cast_and_validate()
  61            |> Ecto.Changeset.apply_action(:insert) do
  62       object = stringify_keys(object)
  63       {:ok, object, meta}
  64     end
  65   end
  66
  67   def validate(%{"type" => "Block"} = block_activity, meta) do
  68     with {:ok, block_activity} <-
  69            block_activity
  70            |> BlockValidator.cast_and_validate()
  71            |> Ecto.Changeset.apply_action(:insert) do
  72       block_activity = stringify_keys(block_activity)
  73       outgoing_blocks = Pleroma.Config.get([:activitypub, :outgoing_blocks])
  74
  75       meta =
  76         if !outgoing_blocks do
  77           Keyword.put(meta, :do_not_federate, true)
  78         else
  79           meta
  80         end
  81
  82       {:ok, block_activity, meta}
  83     end
  84   end
  85
  86   def validate(%{"type" => "Update"} = update_activity, meta) do
  87     with {:ok, update_activity} <-
  88            update_activity
  89            |> UpdateValidator.cast_and_validate()
  90            |> Ecto.Changeset.apply_action(:insert) do
  91       update_activity = stringify_keys(update_activity)
  92       {:ok, update_activity, meta}
  93     end
  94   end
  95
  96   def validate(%{"type" => "Undo"} = object, meta) do
  97     with {:ok, object} <-
  98            object
  99            |> UndoValidator.cast_and_validate()
 100            |> Ecto.Changeset.apply_action(:insert) do
 101       object = stringify_keys(object)
 102       undone_object = Activity.get_by_ap_id(object["object"])
 103
 104       meta =
 105         meta
 106         |> Keyword.put(:object_data, undone_object.data)
 107
 108       {:ok, object, meta}
 109     end
 110   end
 111
 112   def validate(%{"type" => "Delete"} = object, meta) do
 113     with cng <- DeleteValidator.cast_and_validate(object),
 114          do_not_federate <- DeleteValidator.do_not_federate?(cng),
 115          {:ok, object} <- Ecto.Changeset.apply_action(cng, :insert) do
 116       object = stringify_keys(object)
 117       meta = Keyword.put(meta, :do_not_federate, do_not_federate)
 118       {:ok, object, meta}
 119     end
 120   end
 121
 122   def validate(%{"type" => "Like"} = object, meta) do
 123     with {:ok, object} <-
 124            object
 125            |> LikeValidator.cast_and_validate()
 126            |> Ecto.Changeset.apply_action(:insert) do
 127       object = stringify_keys(object)
 128       {:ok, object, meta}
 129     end
 130   end
 131
 132   def validate(%{"type" => "ChatMessage"} = object, meta) do
 133     with {:ok, object} <-
 134            object
 135            |> ChatMessageValidator.cast_and_validate()
 136            |> Ecto.Changeset.apply_action(:insert) do
 137       object = stringify_keys(object)
 138       {:ok, object, meta}
 139     end
 140   end
 141
 142   def validate(%{"type" => "Question"} = object, meta) do
 143     with {:ok, object} <-
 144            object
 145            |> QuestionValidator.cast_and_validate()
 146            |> Ecto.Changeset.apply_action(:insert) do
 147       object = stringify_keys(object)
 148       {:ok, object, meta}
 149     end
 150   end
 151
 152   def validate(%{"type" => "Audio"} = object, meta) do
 153     with {:ok, object} <-
 154            object
 155            |> AudioValidator.cast_and_validate()
 156            |> Ecto.Changeset.apply_action(:insert) do
 157       object = stringify_keys(object)
 158       {:ok, object, meta}
 159     end
 160   end
 161
 162   def validate(%{"type" => "Answer"} = object, meta) do
 163     with {:ok, object} <-
 164            object
 165            |> AnswerValidator.cast_and_validate()
 166            |> Ecto.Changeset.apply_action(:insert) do
 167       object = stringify_keys(object)
 168       {:ok, object, meta}
 169     end
 170   end
 171
 172   def validate(%{"type" => "EmojiReact"} = object, meta) do
 173     with {:ok, object} <-
 174            object
 175            |> EmojiReactValidator.cast_and_validate()
 176            |> Ecto.Changeset.apply_action(:insert) do
 177       object = stringify_keys(object)
 178       {:ok, object, meta}
 179     end
 180   end
 181
 182   def validate(
 183         %{"type" => "Create", "object" => %{"type" => "ChatMessage"} = object} = create_activity,
 184         meta
 185       ) do
 186     with {:ok, object_data} <- cast_and_apply(object),
 187          meta = Keyword.put(meta, :object_data, object_data |> stringify_keys),
 188          {:ok, create_activity} <-
 189            create_activity
 190            |> CreateChatMessageValidator.cast_and_validate(meta)
 191            |> Ecto.Changeset.apply_action(:insert) do
 192       create_activity = stringify_keys(create_activity)
 193       {:ok, create_activity, meta}
 194     end
 195   end
 196
 197   def validate(
 198         %{"type" => "Create", "object" => %{"type" => objtype} = object} = create_activity,
 199         meta
 200       )
 201       when objtype in ~w[Question Answer Audio Event] do
 202     with {:ok, object_data} <- cast_and_apply(object),
 203          meta = Keyword.put(meta, :object_data, object_data |> stringify_keys),
 204          {:ok, create_activity} <-
 205            create_activity
 206            |> CreateGenericValidator.cast_and_validate(meta)
 207            |> Ecto.Changeset.apply_action(:insert) do
 208       create_activity = stringify_keys(create_activity)
 209       {:ok, create_activity, meta}
 210     end
 211   end
 212
 213   def validate(%{"type" => "Announce"} = object, meta) do
 214     with {:ok, object} <-
 215            object
 216            |> AnnounceValidator.cast_and_validate()
 217            |> Ecto.Changeset.apply_action(:insert) do
 218       object = stringify_keys(object)
 219       {:ok, object, meta}
 220     end
 221   end
 222
 223   def cast_and_apply(%{"type" => "ChatMessage"} = object) do
 224     ChatMessageValidator.cast_and_apply(object)
 225   end
 226
 227   def cast_and_apply(%{"type" => "Question"} = object) do
 228     QuestionValidator.cast_and_apply(object)
 229   end
 230
 231   def cast_and_apply(%{"type" => "Answer"} = object) do
 232     AnswerValidator.cast_and_apply(object)
 233   end
 234
 235   def cast_and_apply(%{"type" => "Audio"} = object) do
 236     AudioValidator.cast_and_apply(object)
 237   end
 238
 239   def cast_and_apply(%{"type" => "Event"} = object) do
 240     EventValidator.cast_and_apply(object)
 241   end
 242
 243   def cast_and_apply(o), do: {:error, {:validator_not_set, o}}
 244
 245   # is_struct/1 isn't present in Elixir 1.8.x
 246   def stringify_keys(%{__struct__: _} = object) do
 247     object
 248     |> Map.from_struct()
 249     |> stringify_keys
 250   end
 251
 252   def stringify_keys(object) when is_map(object) do
 253     object
 254     |> Map.new(fn {key, val} -> {to_string(key), stringify_keys(val)} end)
 255   end
 256
 257   def stringify_keys(object) when is_list(object) do
 258     object
 259     |> Enum.map(&stringify_keys/1)
 260   end
 261
 262   def stringify_keys(object), do: object
 263
 264   def fetch_actor(object) do
 265     with {:ok, actor} <- ObjectValidators.ObjectID.cast(object["actor"]) do
 266       User.get_or_fetch_by_ap_id(actor)
 267     end
 268   end
 269
 270   def fetch_actor_and_object(object) do
 271     fetch_actor(object)
 272     Object.normalize(object["object"], true)
 273     :ok
 274   end
 275 end