import Ecto.Query
@type t :: %__MODULE__{}
+ @min_activity_lifetime :timer.hours(1)
schema "activity_expirations" do
belongs_to(:activity, Activity, type: FlakeId)
expiration
|> cast(attrs, [:scheduled_at])
|> validate_required([:scheduled_at])
+ |> validate_scheduled_at()
end
def get_by_activity_id(activity_id) do
|> where([exp], exp.scheduled_at < ^naive_datetime)
|> Repo.all()
end
+
+ def validate_scheduled_at(changeset) do
+ validate_change(changeset, :scheduled_at, fn _, scheduled_at ->
+ if not expires_late_enough?(scheduled_at) do
+ [scheduled_at: "an ephemeral activity must live for at least one hour"]
+ else
+ []
+ end
+ end)
+ end
+
+ def expires_late_enough?(scheduled_at) do
+ now = NaiveDateTime.utc_now()
+ diff = NaiveDateTime.diff(scheduled_at, now, :millisecond)
+ diff >= @min_activity_lifetime
+ end
end