debianize-mobilizon/lib/mobilizon/actors/follower.ex
2019-09-09 00:52:49 +02:00

64 lines
1.7 KiB
Elixir

defmodule Mobilizon.Actors.Follower do
@moduledoc """
Represents the following of an actor to another actor.
"""
use Ecto.Schema
import Ecto.Changeset
alias Mobilizon.Actors.Actor
@type t :: %__MODULE__{
approved: boolean,
url: String.t(),
target_actor: Actor.t(),
actor: Actor.t()
}
@required_attrs [:url, :approved, :target_actor_id, :actor_id]
@attrs @required_attrs
@primary_key {:id, :binary_id, autogenerate: true}
schema "followers" do
field(:approved, :boolean, default: false)
field(:url, :string)
belongs_to(:target_actor, Actor)
belongs_to(:actor, Actor)
end
@doc false
@spec changeset(t | Ecto.Changeset.t(), map) :: Ecto.Changeset.t()
def changeset(follower, attrs) do
follower
|> cast(attrs, @attrs)
|> ensure_url()
|> validate_required(@required_attrs)
|> unique_constraint(:target_actor_id,
name: :followers_actor_target_actor_unique_index
)
end
# If there's a blank URL that's because we're doing the first insert
@spec ensure_url(Ecto.Changeset.t()) :: Ecto.Changeset.t()
defp ensure_url(%Ecto.Changeset{data: %__MODULE__{url: nil}} = changeset) do
case fetch_change(changeset, :url) do
{:ok, _url} -> changeset
:error -> generate_url(changeset)
end
end
# Most time just go with the given URL
defp ensure_url(%Ecto.Changeset{} = changeset), do: changeset
@spec generate_url(Ecto.Changeset.t()) :: Ecto.Changeset.t()
defp generate_url(%Ecto.Changeset{} = changeset) do
uuid = Ecto.UUID.generate()
changeset
|> put_change(:id, uuid)
|> put_change(:url, "#{MobilizonWeb.Endpoint.url()}/follow/#{uuid}")
end
end