posts: mark media asset as expunged when post is expunged.

Fix it so that when a post is expunged, the media asset is also marked
as expunged. This way the files will be deleted, but the media asset
will still remain as a record of what was expunged. The media asset will
have the md5, width, height, file ext, and file size of the deleted file.

app/models/media_asset.rb

@@ -179,6 +179,14 @@ class MediaAsset < ApplicationRecord
       self.pixiv_ugoira_frame_data = PixivUgoiraFrameData.new(data: media_file.frame_data, content_type: "image/jpeg") if is_ugoira?
     end
 
+    def expunge!
+      delete_files!
+      update!(status: :expunged)
+    rescue
+      update!(status: :failed)
+      raise
+    end
+
     def delete_files!
       variants.each(&:delete_file!)
     end

app/models/post.rb

@@ -32,7 +32,6 @@ class Post < ApplicationRecord
   after_save :create_version
   after_save :update_parent_on_save
   after_save :apply_post_metatags
-  after_commit :delete_files, :on => :destroy
 
   belongs_to :approver, class_name: "User", optional: true
   belongs_to :uploader, :class_name => "User", :counter_cache => "post_upload_count"
@@ -75,30 +74,6 @@ class Post < ApplicationRecord
   module FileMethods
     extend ActiveSupport::Concern
 
-    module ClassMethods
-      def delete_files(post_id, md5, file_ext, force: false)
-        if Post.exists?(md5: md5) && !force
-          raise DeletionError, "Files still in use; skipping deletion."
-        end
-
-        Danbooru.config.storage_manager.delete_file(post_id, md5, file_ext, :original)
-        Danbooru.config.storage_manager.delete_file(post_id, md5, file_ext, :large)
-        Danbooru.config.storage_manager.delete_file(post_id, md5, file_ext, :preview)
-
-        Danbooru.config.backup_storage_manager.delete_file(post_id, md5, file_ext, :original)
-        Danbooru.config.backup_storage_manager.delete_file(post_id, md5, file_ext, :large)
-        Danbooru.config.backup_storage_manager.delete_file(post_id, md5, file_ext, :preview)
-      end
-    end
-
-    def delete_files
-      Post.delete_files(id, md5, file_ext, force: true)
-    end
-
-    def backup_storage_manager
-      Danbooru.config.backup_storage_manager
-    end
-
     def storage_manager
       Danbooru.config.storage_manager
     end
@@ -815,6 +790,7 @@ class Post < ApplicationRecord
           decrement_tag_post_counts
           remove_from_all_pools
           remove_from_fav_groups
+          media_asset.expunge!
           destroy
           update_parent_on_destroy
         end

test/factories/post.rb

@@ -25,8 +25,7 @@ FactoryBot.define do
       image_height { media_file.height }
       file_ext { media_file.file_ext }
       file_size { media_file.file_size }
-
+      media_asset { MediaAsset.upload!(media_file) }
-      before(:create) { |post, evaluator| MediaAsset.upload!(evaluator.media_file) }
     end
   end
 end

test/unit/post_test.rb

@@ -47,6 +47,12 @@ class PostTest < ActiveSupport::TestCase
         assert_raise(StandardError) { @post.file(:original) }
       end
 
+      should "mark the media asset as expunged" do
+        @post.expunge!
+
+        assert_equal("expunged", @post.media_asset.status)
+      end
+
       should "remove all favorites" do
         @post.expunge!