correct regression around file renaming

lib/upload_creator.rb

@@ -78,11 +78,20 @@ class UploadCreator
 
       fixed_original_filename = nil
       if is_image
+
+        current_extension = File.extname(@filename).downcase.sub("jpeg", "jpg")
+        expected_extension = ".#{image_type}".downcase.sub("jpeg", "jpg")
+
         # we have to correct original filename here, no choice
         # otherwise validation will fail and we can not save
         # TODO decide if we only run the validation on the extension
-        if File.extname(@filename) != ".#{image_type}"
+        if current_extension != expected_extension
-          fixed_original_filename = "#{@filename}_fixed.#{image_type}"
+          basename = File.basename(@filename, current_extension)
+
+          if basename.length == 0
+            basename = "image"
+          end
+          fixed_original_filename = "#{basename}#{expected_extension}"
         end
       end
 

spec/lib/upload_creator_spec.rb

@@ -41,7 +41,7 @@ RSpec.describe UploadCreator do
 
         expect(upload.extension).to eq('png')
         expect(File.extname(upload.url)).to eq('.png')
-        expect(upload.original_filename).to eq('png_as.bin_fixed.png')
+        expect(upload.original_filename).to eq('png_as.png')
       end
     end
 
@@ -65,7 +65,7 @@ RSpec.describe UploadCreator do
 
         expect(upload.extension).to eq('jpeg')
         expect(File.extname(upload.url)).to eq('.jpeg')
-        expect(upload.original_filename).to eq('logo.png_fixed.jpeg')
+        expect(upload.original_filename).to eq('logo.jpg')
       end
     end
   end

spec/requests/uploads_controller_spec.rb

@@ -212,7 +212,7 @@ describe UploadsController do
 
       get "/uploads/#{site}/#{upload.sha1}.json"
       expect(response.status).to eq(200)
-      expect(response.headers["Content-Disposition"]).to eq("attachment; filename=\"image_no_extension_fixed.png\"")
+      expect(response.headers["Content-Disposition"]).to eq("attachment; filename=\"image_no_extension.png\"")
     end
 
     it "handles file without extension" do