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 © 2017-2021 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.EctoType.ActivityPub.ObjectValidators
   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     field(:blurhash, :string)
  18
  19     embeds_many :url, UrlObjectValidator, primary_key: false do
  20       field(:type, :string)
  21       field(:href, ObjectValidators.Uri)
  22       field(:mediaType, :string, default: "application/octet-stream")
  23       field(:width, :integer)
  24       field(:height, :integer)
  25     end
  26   end
  27
  28   def cast_and_validate(data) do
  29     data
  30     |> cast_data()
  31     |> validate_data()
  32   end
  33
  34   def cast_data(data) do
  35     %__MODULE__{}
  36     |> changeset(data)
  37   end
  38
  39   def changeset(struct, data) do
  40     data =
  41       data
  42       |> fix_media_type()
  43       |> fix_url()
  44
  45     struct
  46     |> cast(data, [:type, :mediaType, :name, :blurhash])
  47     |> cast_embed(:url, with: &url_changeset/2)
  48     |> validate_inclusion(:type, ~w[Link Document Audio Image Video])
  49     |> validate_required([:type, :mediaType, :url])
  50   end
  51
  52   def url_changeset(struct, data) do
  53     data = fix_media_type(data)
  54
  55     struct
  56     |> cast(data, [:type, :href, :mediaType, :width, :height])
  57     |> validate_inclusion(:type, ["Link"])
  58     |> validate_required([:type, :href, :mediaType])
  59   end
  60
  61   def fix_media_type(data) do
  62     data = Map.put_new(data, "mediaType", data["mimeType"])
  63
  64     if is_bitstring(data["mediaType"]) && MIME.extensions(data["mediaType"]) != [] do
  65       data
  66     else
  67       Map.put(data, "mediaType", "application/octet-stream")
  68     end
  69   end
  70
  71   defp handle_href(href, mediaType) do
  72     [
  73       %{
  74         "href" => href,
  75         "type" => "Link",
  76         "mediaType" => mediaType
  77       }
  78     ]
  79   end
  80
  81   defp fix_url(data) do
  82     cond do
  83       is_binary(data["url"]) ->
  84         Map.put(data, "url", handle_href(data["url"], data["mediaType"]))
  85
  86       is_binary(data["href"]) and data["url"] == nil ->
  87         Map.put(data, "url", handle_href(data["href"], data["mediaType"]))
  88
  89       true ->
  90         data
  91     end
  92   end
  93
  94   defp validate_data(cng) do
  95     cng
  96     |> validate_inclusion(:type, ~w[Document Audio Image Video])
  97     |> validate_required([:mediaType, :url, :type])
  98   end
  99 end