uploads: refactor /uploads/:id page for multi-file uploads.

app/models/upload.rb

@@ -1,8 +1,6 @@
 # frozen_string_literal: true
 
 class Upload < ApplicationRecord
-  extend Memoist
-
   attr_accessor :file
 
   belongs_to :uploader, class_name: "User"
@@ -45,6 +43,10 @@ class Upload < ApplicationRecord
     def is_errored?
       status == "error"
     end
+
+    def is_finished?
+      is_completed? || is_errored?
+    end
   end
 
   concerning :ValidationMethods do
@@ -65,11 +67,6 @@ class Upload < ApplicationRecord
         Addressable::URI.normalized_encode(url)
       end
     end
-
-    def source_strategy
-      return nil if source.blank?
-      Sources::Strategies.find(source, referer_url)
-    end
   end
 
   def self.search(params)
@@ -116,6 +113,4 @@ class Upload < ApplicationRecord
   def self.available_includes
     [:uploader, :upload_media_assets, :media_assets]
   end
-
-  memoize :source_strategy
 end