akkoma/lib/pleroma/workers/purge_expired_activity.ex

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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
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defmodule Pleroma.Workers.PurgeExpiredActivity do
@moduledoc """
Worker which purges expired activity.
"""
use Oban.Worker, queue: :activity_expiration, max_attempts: 1
import Ecto.Query
alias Pleroma.Activity
@spec enqueue(map()) ::
{:ok, Oban.Job.t()}
| {:error, :expired_activities_disabled}
| {:error, :expiration_too_close}
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def enqueue(args) do
with true <- enabled?(),
args when is_map(args) <- validate_expires_at(args) do
{scheduled_at, args} = Map.pop(args, :expires_at)
args
|> __MODULE__.new(scheduled_at: scheduled_at)
|> Oban.insert()
end
end
@impl true
def perform(%Oban.Job{args: %{"activity_id" => id}}) do
with %Activity{} = activity <- find_activity(id),
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%Pleroma.User{} = user <- find_user(activity.object.data["actor"]),
false <- pinned_by_actor?(activity, user) do
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Pleroma.Web.CommonAPI.delete(activity.id, user)
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else
:pinned_by_actor ->
# if activity is pinned, schedule deletion on next day
enqueue(%{activity_id: id, expires_at: DateTime.add(DateTime.utc_now(), 24 * 3600)})
:ok
error ->
error
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end
end
defp enabled? do
with false <- Pleroma.Config.get([__MODULE__, :enabled], false) do
{:error, :expired_activities_disabled}
end
end
defp validate_expires_at(%{validate: false} = args), do: Map.delete(args, :validate)
defp validate_expires_at(args) do
if expires_late_enough?(args[:expires_at]) do
args
else
{:error, :expiration_too_close}
end
end
defp find_activity(id) do
with nil <- Activity.get_by_id_with_object(id) do
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{:error, :activity_not_found}
end
end
defp find_user(ap_id) do
with nil <- Pleroma.User.get_by_ap_id(ap_id) do
{:error, :user_not_found}
end
end
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defp pinned_by_actor?(activity, user) do
with true <- Activity.pinned_by_actor?(activity, user) do
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:pinned_by_actor
end
end
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def get_expiration(id) do
from(j in Oban.Job,
where: j.state == "scheduled",
where: j.queue == "activity_expiration",
where: fragment("?->>'activity_id' = ?", j.args, ^id)
)
|> Pleroma.Repo.one()
end
@spec expires_late_enough?(DateTime.t()) :: boolean()
def expires_late_enough?(scheduled_at) do
now = DateTime.utc_now()
diff = DateTime.diff(scheduled_at, now, :millisecond)
diff > :timer.hours(1)
end
end