Add retention policy for cached content and media (#19232)

app/lib/vacuum/media_attachments_vacuum.rb

@@ -0,0 +1,40 @@
+# frozen_string_literal: true
+
+class Vacuum::MediaAttachmentsVacuum
+  TTL = 1.day.freeze
+
+  def initialize(retention_period)
+    @retention_period = retention_period
+  end
+
+  def perform
+    vacuum_cached_files! if retention_period?
+    vacuum_orphaned_records!
+  end
+
+  private
+
+  def vacuum_cached_files!
+    media_attachments_past_retention_period.find_each do |media_attachment|
+      media_attachment.file.destroy
+      media_attachment.thumbnail.destroy
+      media_attachment.save
+    end
+  end
+
+  def vacuum_orphaned_records!
+    orphaned_media_attachments.in_batches.destroy_all
+  end
+
+  def media_attachments_past_retention_period
+    MediaAttachment.unscoped.remote.cached.where(MediaAttachment.arel_table[:created_at].lt(@retention_period.ago)).where(MediaAttachment.arel_table[:updated_at].lt(@retention_period.ago))
+  end
+
+  def orphaned_media_attachments
+    MediaAttachment.unscoped.unattached.where(MediaAttachment.arel_table[:created_at].lt(TTL.ago))
+  end
+
+  def retention_period?
+    @retention_period.present?
+  end
+end