add invites

lib/lokal/invites/invite.ex

@@ -0,0 +1,57 @@
+defmodule Lokal.Invites.Invite do
+  @moduledoc """
+  An invite, created by an admin to allow someone to join their instance. An
+  invite can be enabled or disabled, and can have an optional number of uses if
+  `:uses_left` is defined.
+  """
+
+  use Ecto.Schema
+  import Ecto.Changeset
+  alias Ecto.{Changeset, UUID}
+  alias Lokal.{Accounts.User, Invites.Invite}
+
+  @primary_key {:id, :binary_id, autogenerate: true}
+  @foreign_key_type :binary_id
+  schema "invites" do
+    field :name, :string
+    field :token, :string
+    field :uses_left, :integer, default: nil
+    field :disabled_at, :naive_datetime
+
+    belongs_to :user, User
+
+    timestamps()
+  end
+
+  @type t :: %Invite{
+          id: id(),
+          name: String.t(),
+          token: String.t(),
+          uses_left: integer() | nil,
+          disabled_at: NaiveDateTime.t(),
+          user: User.t(),
+          user_id: User.id(),
+          inserted_at: NaiveDateTime.t(),
+          updated_at: NaiveDateTime.t()
+        }
+  @type new_invite :: %Invite{}
+  @type id :: UUID.t()
+
+  @doc false
+  @spec create_changeset(new_invite(), attrs :: map()) :: Changeset.t(new_invite())
+  def create_changeset(invite, attrs) do
+    invite
+    |> cast(attrs, [:name, :token, :uses_left, :disabled_at, :user_id])
+    |> validate_required([:name, :token, :user_id])
+    |> validate_number(:uses_left, greater_than_or_equal_to: 0)
+  end
+
+  @doc false
+  @spec update_changeset(t() | new_invite(), attrs :: map()) :: Changeset.t(t() | new_invite())
+  def update_changeset(invite, attrs) do
+    invite
+    |> cast(attrs, [:name, :uses_left, :disabled_at])
+    |> validate_required([:name, :token, :user_id])
+    |> validate_number(:uses_left, greater_than_or_equal_to: 0)
+  end
+end