114 lines
3.2 KiB
Elixir
114 lines
3.2 KiB
Elixir
# Pleroma: A lightweight social networking server
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# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
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# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.Workers.AttachmentsCleanupWorker do
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import Ecto.Query
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alias Pleroma.Object
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alias Pleroma.Repo
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use Pleroma.Workers.WorkerHelper, queue: "attachments_cleanup"
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@impl Oban.Worker
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def perform(%Job{
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args: %{
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"op" => "cleanup_attachments",
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"object" => %{"data" => %{"attachment" => [_ | _] = attachments, "actor" => actor}}
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}
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}) do
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attachments
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|> Enum.flat_map(fn item -> Enum.map(item["url"], & &1["href"]) end)
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|> fetch_objects
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|> prepare_objects(actor, Enum.map(attachments, & &1["name"]))
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|> filter_objects
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|> do_clean
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{:ok, :success}
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end
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def perform(%Job{args: %{"op" => "cleanup_attachments", "object" => _object}}), do: {:ok, :skip}
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defp do_clean({object_ids, attachment_urls}) do
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uploader = Pleroma.Config.get([Pleroma.Upload, :uploader])
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prefix =
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case Pleroma.Config.get([Pleroma.Upload, :base_url]) do
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nil -> "media"
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_ -> ""
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end
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base_url =
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String.trim_trailing(
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Pleroma.Config.get([Pleroma.Upload, :base_url], Pleroma.Web.base_url()),
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"/"
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)
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Enum.each(attachment_urls, fn href ->
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href
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|> String.trim_leading("#{base_url}/#{prefix}")
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|> uploader.delete_file()
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end)
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delete_objects(object_ids)
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end
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defp delete_objects([_ | _] = object_ids) do
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Repo.delete_all(from(o in Object, where: o.id in ^object_ids))
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end
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defp delete_objects(_), do: :ok
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# we should delete 1 object for any given attachment, but don't delete
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# files if there are more than 1 object for it
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defp filter_objects(objects) do
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Enum.reduce(objects, {[], []}, fn {href, %{id: id, count: count}}, {ids, hrefs} ->
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with 1 <- count do
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{ids ++ [id], hrefs ++ [href]}
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else
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_ -> {ids ++ [id], hrefs}
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end
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end)
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end
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defp prepare_objects(objects, actor, names) do
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objects
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|> Enum.reduce(%{}, fn %{
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id: id,
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data: %{
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"url" => [%{"href" => href}],
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"actor" => obj_actor,
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"name" => name
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}
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},
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acc ->
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Map.update(acc, href, %{id: id, count: 1}, fn val ->
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case obj_actor == actor and name in names do
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true ->
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# set id of the actor's object that will be deleted
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%{val | id: id, count: val.count + 1}
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false ->
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# another actor's object, just increase count to not delete file
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%{val | count: val.count + 1}
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end
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end)
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end)
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end
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defp fetch_objects(hrefs) do
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from(o in Object,
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where:
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fragment(
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"to_jsonb(array(select jsonb_array_elements((?)#>'{url}') ->> 'href' where jsonb_typeof((?)#>'{url}') = 'array'))::jsonb \\?| (?)",
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o.data,
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o.data,
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^hrefs
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)
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)
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# The query above can be time consumptive on large instances until we
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# refactor how uploads are stored
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|> Repo.all(timeout: :infinity)
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end
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end
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