# Pleroma: A lightweight social networking server
# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only

defmodule Pleroma.Web.ActivityPub.ObjectValidators.FollowValidator do
  use Ecto.Schema

  alias Pleroma.EctoType.ActivityPub.ObjectValidators

  import Ecto.Changeset
  import Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations

  @primary_key false

  embedded_schema do
    field(:id, ObjectValidators.ObjectID, primary_key: true)
    field(:type, :string)
    field(:actor, ObjectValidators.ObjectID)
    field(:to, ObjectValidators.Recipients, default: [])
    field(:cc, ObjectValidators.Recipients, default: [])
    field(:object, ObjectValidators.ObjectID)
    field(:state, :string, default: "pending")
  end

  def cast_data(data) do
    %__MODULE__{}
    |> cast(data, __schema__(:fields))
  end

  defp validate_data(cng) do
    cng
    |> validate_required([:id, :type, :actor, :to, :cc, :object])
    |> validate_inclusion(:type, ["Follow"])
    |> validate_inclusion(:state, ~w{pending reject accept})
    |> validate_actor_presence()
    |> validate_actor_presence(field_name: :object)
  end

  def cast_and_validate(data) do
    data
    |> cast_data
    |> validate_data
  end
end