74 lines
2.3 KiB
Elixir
74 lines
2.3 KiB
Elixir
defmodule Mobilizon.Service.CleanOrphanMedia do
|
|
@moduledoc """
|
|
Service to clean orphan media
|
|
"""
|
|
|
|
alias Mobilizon.Actors.Actor
|
|
alias Mobilizon.Medias
|
|
alias Mobilizon.Medias.Media
|
|
alias Mobilizon.Storage.Repo
|
|
import Ecto.Query
|
|
|
|
@doc """
|
|
Clean orphan media
|
|
|
|
Remove media that is not attached to an entity, such as media uploads that were never used in entities.
|
|
|
|
Options:
|
|
* `grace_period` how old in hours can the media be before it's taken into account for deletion
|
|
* `dry_run` just return the media that would have been deleted, don't actually delete it
|
|
"""
|
|
@spec clean(Keyword.t()) :: {:ok, list(Media.t())} | {:error, String.t()}
|
|
def clean(opts \\ []) do
|
|
medias = find_media(opts)
|
|
|
|
if Keyword.get(opts, :dry_run, false) do
|
|
{:ok, medias}
|
|
else
|
|
Enum.each(medias, fn media ->
|
|
Medias.delete_media(media, ignore_file_not_found: true)
|
|
end)
|
|
|
|
{:ok, medias}
|
|
end
|
|
end
|
|
|
|
# Ecto doesn't currently allow us to use exists with a subquery,
|
|
# so we can't create the union through Ecto
|
|
# https://github.com/elixir-ecto/ecto/issues/3619
|
|
@union_query [
|
|
[from: "events", param: "picture_id"],
|
|
[from: "events_medias", param: "media_id"],
|
|
[from: "posts", param: "picture_id"],
|
|
[from: "posts_medias", param: "media_id"],
|
|
[from: "comments_medias", param: "media_id"]
|
|
]
|
|
|> Enum.map(fn [from: from, param: param] ->
|
|
"SELECT 1 FROM #{from} WHERE #{from}.#{param} = m0.id"
|
|
end)
|
|
|> Enum.join(" UNION ")
|
|
|> (&"NOT EXISTS(#{&1})").()
|
|
|
|
@spec find_media(Keyword.t()) :: list(Media.t())
|
|
defp find_media(opts) do
|
|
default_grace_period =
|
|
Mobilizon.Config.get([:instance, :orphan_upload_grace_period_hours], 48)
|
|
|
|
grace_period = Keyword.get(opts, :grace_period, default_grace_period)
|
|
expiration_date = DateTime.add(DateTime.utc_now(), grace_period * -3600)
|
|
|
|
query =
|
|
from(m in Media,
|
|
as: :media,
|
|
distinct: true,
|
|
join: a in Actor,
|
|
on: a.id == m.actor_id,
|
|
where: is_nil(a.domain),
|
|
where: m.inserted_at < ^expiration_date,
|
|
where: fragment(@union_query)
|
|
)
|
|
|
|
Repo.all(query)
|
|
end
|
|
end
|