neiam /gitgud

defmodule GitGud.Labels.Labeling do
  use Ecto.Schema
  import Ecto.Changeset

  alias GitGud.Labels.Label

  @valid_target_types ~w(issue pull_request)

  schema "labelings" do
    belongs_to :label, Label
    field :target_type, :string
    field :target_id, :integer

    timestamps(type: :utc_datetime, updated_at: false)
  end

  def changeset(labeling, attrs) do
    labeling
    |> cast(attrs, [:label_id, :target_type, :target_id])
    |> validate_required([:label_id, :target_type, :target_id])
    |> validate_inclusion(:target_type, @valid_target_types)
    |> unique_constraint([:label_id, :target_type, :target_id])
  end

  def target_types, do: @valid_target_types
end