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# Pleroma: A lightweight social networking server
# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.ActivityExpiration do
use Ecto.Schema
alias Pleroma.Activity
alias Pleroma.ActivityExpiration
alias Pleroma.Repo
import Ecto.Changeset
import Ecto.Query
@type t :: %__MODULE__{}
@min_activity_lifetime :timer.hours(1)
schema "activity_expirations" do
belongs_to(:activity, Activity, type: FlakeId.Ecto.CompatType)
field(:scheduled_at, :naive_datetime)
end
def changeset(%ActivityExpiration{} = expiration, attrs, validate_scheduled_at) do
expiration
|> cast(attrs, [:scheduled_at])
|> validate_required([:scheduled_at])
|> validate_scheduled_at(validate_scheduled_at)
end
def get_by_activity_id(activity_id) do
ActivityExpiration
|> where([exp], exp.activity_id == ^activity_id)
|> Repo.one()
end
def create(%Activity{} = activity, scheduled_at, validate_scheduled_at \\ true) do
%ActivityExpiration{activity_id: activity.id}
|> changeset(%{scheduled_at: scheduled_at}, validate_scheduled_at)
|> Repo.insert()
end
def due_expirations(offset \\ 0) do
naive_datetime =
NaiveDateTime.utc_now()
|> NaiveDateTime.add(offset, :millisecond)
ActivityExpiration
|> where([exp], exp.scheduled_at < ^naive_datetime)
|> Repo.all()
end
def validate_scheduled_at(changeset, false), do: changeset
def validate_scheduled_at(changeset, true) 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
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