- # find all objects for copies of the attachments, name and actor doesn't matter here
- object_ids_and_hrefs =
- from(o in Object,
- where:
- fragment(
- "to_jsonb(array(select jsonb_array_elements((?)#>'{url}') ->> 'href' where jsonb_typeof((?)#>'{url}') = 'array'))::jsonb \\?| (?)",
- o.data,
- o.data,
- ^hrefs
- )
- )
- # The query above can be time consumptive on large instances until we
- # refactor how uploads are stored
- |> Repo.all(timeout: :infinity)
- # we should delete 1 object for any given attachment, but don't delete
- # files if there are more than 1 object for it
- |> Enum.reduce(%{}, fn %{
- id: id,
- data: %{
- "url" => [%{"href" => href}],
- "actor" => obj_actor,
- "name" => name
- }
- },
- acc ->
- Map.update(acc, href, %{id: id, count: 1}, fn val ->
- case obj_actor == actor and name in names do
- true ->
- # set id of the actor's object that will be deleted
- %{val | id: id, count: val.count + 1}
-
- false ->
- # another actor's object, just increase count to not delete file
- %{val | count: val.count + 1}
- end
- end)
- end)
- |> Enum.map(fn {href, %{id: id, count: count}} ->
- # only delete files that have single instance
- with 1 <- count do
- href
- |> String.trim_leading("#{base_url}/#{prefix}")
- |> uploader.delete_file()
-
- {id, href}
- else
- _ -> {id, nil}
- end
- end)