git.squeep.com Git - akkoma/blob - lib/pleroma/activity_expiration.ex

   1 # Pleroma: A lightweight social networking server
   2 # Copyright © 2019 Pleroma Authors <https://pleroma.social/>
   3 # SPDX-License-Identifier: AGPL-3.0-only
   4
   5 defmodule Pleroma.ActivityExpiration do
   6   use Ecto.Schema
   7
   8   alias Pleroma.Activity
   9   alias Pleroma.ActivityExpiration
  10   alias Pleroma.FlakeId
  11   alias Pleroma.Repo
  12
  13   import Ecto.Changeset
  14   import Ecto.Query
  15
  16   @type t :: %__MODULE__{}
  17   @min_activity_lifetime :timer.hours(1)
  18
  19   schema "activity_expirations" do
  20     belongs_to(:activity, Activity, type: FlakeId)
  21     field(:scheduled_at, :naive_datetime)
  22   end
  23
  24   def changeset(%ActivityExpiration{} = expiration, attrs) do
  25     expiration
  26     |> cast(attrs, [:scheduled_at])
  27     |> validate_required([:scheduled_at])
  28     |> validate_scheduled_at()
  29   end
  30
  31   def get_by_activity_id(activity_id) do
  32     ActivityExpiration
  33     |> where([exp], exp.activity_id == ^activity_id)
  34     |> Repo.one()
  35   end
  36
  37   def create(%Activity{} = activity, scheduled_at) do
  38     %ActivityExpiration{activity_id: activity.id}
  39     |> changeset(%{scheduled_at: scheduled_at})
  40     |> Repo.insert()
  41   end
  42
  43   def due_expirations(offset \\ 0) do
  44     naive_datetime =
  45       NaiveDateTime.utc_now()
  46       |> NaiveDateTime.add(offset, :millisecond)
  47
  48     ActivityExpiration
  49     |> where([exp], exp.scheduled_at < ^naive_datetime)
  50     |> Repo.all()
  51   end
  52
  53   def validate_scheduled_at(changeset) do
  54     validate_change(changeset, :scheduled_at, fn _, scheduled_at ->
  55       if not expires_late_enough?(scheduled_at) do
  56         [scheduled_at: "an ephemeral activity must live for at least one hour"]
  57       else
  58         []
  59       end
  60     end)
  61   end
  62
  63   def expires_late_enough?(scheduled_at) do
  64     now = NaiveDateTime.utc_now()
  65     diff = NaiveDateTime.diff(scheduled_at, now, :millisecond)
  66     diff >= @min_activity_lifetime
  67   end
  68 end