refactor cropped images into explore/posts/intro

app/models/post.rb

@@ -142,6 +142,15 @@ class Post < ApplicationRecord
        end
     end
 
+    # this is for the 640x320 version
+    def cropped_file_url
+      if Danbooru.config.use_s3_proxy?(self)
+        "/cached/data/cropped/large/#{md5}.jpg"
+      else
+        "/data/cropped/large/#{md5}.jpg"
+      end
+    end
+
     def large_file_url
       if has_large?
         if Danbooru.config.use_s3_proxy?(self)

app/models/upload.rb

@@ -200,9 +200,8 @@ class Upload < ApplicationRecord
     end
 
     def notify_cropper(post)
-      if Danbooru.config.aws_sqs_cropper_url && is_image?
-        sqs = SqsService.new(Danbooru.config.aws_sqs_cropper_url)
-        sqs.send_message("#{post.id},https://#{Danbooru.config.hostname}/data/#{post.md5}.#{post.file_ext}")
+      if ImageCropper.enabled?
+        ImageCropper.notify(post)
       end
     end
   end