git.squeep.com Git - akkoma/blob - lib/pleroma/web/activity_pub/object_validators/attachment_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.ObjectValidators.AttachmentValidator do
   6   use Ecto.Schema
   7
   8   alias Pleroma.Web.ActivityPub.ObjectValidators.UrlObjectValidator
   9
  10   import Ecto.Changeset
  11
  12   @primary_key false
  13   embedded_schema do
  14     field(:type, :string)
  15     field(:mediaType, :string, default: "application/octet-stream")
  16     field(:name, :string)
  17
  18     embeds_many(:url, UrlObjectValidator)
  19   end
  20
  21   def cast_and_validate(data) do
  22     data
  23     |> cast_data()
  24     |> validate_data()
  25   end
  26
  27   def cast_data(data) do
  28     %__MODULE__{}
  29     |> changeset(data)
  30   end
  31
  32   def changeset(struct, data) do
  33     data =
  34       data
  35       |> fix_media_type()
  36       |> fix_url()
  37
  38     struct
  39     |> cast(data, [:type, :mediaType, :name])
  40     |> cast_embed(:url, required: true)
  41   end
  42
  43   def fix_media_type(data) do
  44     data = Map.put_new(data, "mediaType", data["mimeType"])
  45
  46     if MIME.valid?(data["mediaType"]) do
  47       data
  48     else
  49       Map.put(data, "mediaType", "application/octet-stream")
  50     end
  51   end
  52
  53   defp handle_href(href, mediaType) do
  54     [
  55       %{
  56         "href" => href,
  57         "type" => "Link",
  58         "mediaType" => mediaType
  59       }
  60     ]
  61   end
  62
  63   defp fix_url(data) do
  64     cond do
  65       is_binary(data["url"]) ->
  66         Map.put(data, "url", handle_href(data["url"], data["mediaType"]))
  67
  68       is_binary(data["href"]) and data["url"] == nil ->
  69         Map.put(data, "url", handle_href(data["href"], data["mediaType"]))
  70
  71       true ->
  72         data
  73     end
  74   end
  75
  76   def validate_data(cng) do
  77     cng
  78     |> validate_required([:mediaType, :url, :type])
  79   end
  80 end