Fixes upload links not copying as GFM correctly

Closes https://gitlab.com/gitlab-org/gitlab/-/issues/214480

changelogs/unreleased/ph-214480-copyUploadLinks.yml

+---
+title: Fixed copy as GFM not copying upload links
+merge_request: 29683
+author:
+type: fixed

lib/banzai/filter/upload_link_filter.rb

@@ -50,6 +50,10 @@ module Banzai
             Addressable::URI.join(Gitlab.config.gitlab.base_url, path).to_s
           end
 
+        if html_attr.name == 'href'
+          html_attr.parent.set_attribute('data-link', 'true')
+        end
+
         html_attr.parent.add_class('gfm')
       end
 

spec/features/markdown/copy_as_gfm_spec.rb

@@ -172,6 +172,12 @@ describe 'Copy as GFM', :js do
         '![Image](https://example.com/image.png)'
       )
 
+      verify_media_with_partial_path(
+        '[test.txt](/uploads/a123/image.txt)',
+
+        project_media_uri(@project, '/uploads/a123/image.txt')
+      )
+
       verify_media_with_partial_path(
         '![Image](/uploads/a123/image.png)',
 

spec/lib/banzai/filter/upload_link_filter_spec.rb

@@ -51,6 +51,7 @@ describe Banzai::Filter::UploadLinkFilter do
 
         expect(doc.at_css('a')['href']).to eq(absolute_path)
         expect(doc.at_css('a').classes).to include('gfm')
+        expect(doc.at_css('a')['data-link']).to eq('true')
       end
     end
 
@@ -59,11 +60,13 @@ describe Banzai::Filter::UploadLinkFilter do
 
       expect(doc.at_css('a')['href']).to eq(relative_path)
       expect(doc.at_css('a').classes).to include('gfm')
+      expect(doc.at_css('a')['data-link']).to eq('true')
 
       doc = filter(nested(link(upload_path)))
 
       expect(doc.at_css('a')['href']).to eq(relative_path)
       expect(doc.at_css('a').classes).to include('gfm')
+      expect(doc.at_css('a')['data-link']).to eq('true')
     end
 
     it 'rebuilds relative URL for an image' do
@@ -71,11 +74,13 @@ describe Banzai::Filter::UploadLinkFilter do
 
       expect(doc.at_css('img')['src']).to eq(relative_path)
       expect(doc.at_css('img').classes).to include('gfm')
+      expect(doc.at_css('img')['data-link']).not_to eq('true')
 
       doc = filter(nested(image(upload_path)))
 
       expect(doc.at_css('img')['src']).to eq(relative_path)
       expect(doc.at_css('img').classes).to include('gfm')
+      expect(doc.at_css('img')['data-link']).not_to eq('true')
     end
 
     it 'does not modify absolute URL' do
@@ -83,6 +88,7 @@ describe Banzai::Filter::UploadLinkFilter do
 
       expect(doc.at_css('a')['href']).to eq 'http://example.com'
       expect(doc.at_css('a').classes).not_to include('gfm')
+      expect(doc.at_css('a')['data-link']).not_to eq('true')
     end
 
     it 'supports unescaped Unicode filenames' do
@@ -91,6 +97,7 @@ describe Banzai::Filter::UploadLinkFilter do
 
       expect(doc.at_css('a')['href']).to eq("/#{project.full_path}/uploads/%ED%95%9C%EA%B8%80.png")
       expect(doc.at_css('a').classes).to include('gfm')
+      expect(doc.at_css('a')['data-link']).to eq('true')
     end
 
     it 'supports escaped Unicode filenames' do
@@ -100,6 +107,7 @@ describe Banzai::Filter::UploadLinkFilter do
 
       expect(doc.at_css('img')['src']).to eq("/#{project.full_path}/uploads/%ED%95%9C%EA%B8%80.png")
       expect(doc.at_css('img').classes).to include('gfm')
+      expect(doc.at_css('img')['data-link']).not_to eq('true')
     end
   end
 
@@ -118,6 +126,7 @@ describe Banzai::Filter::UploadLinkFilter do
 
         expect(doc.at_css('a')['href']).to eq(absolute_path)
         expect(doc.at_css('a').classes).to include('gfm')
+        expect(doc.at_css('a')['data-link']).to eq('true')
       end
     end
 
@@ -126,6 +135,7 @@ describe Banzai::Filter::UploadLinkFilter do
 
       expect(doc.at_css('a')['href']).to eq(relative_path)
       expect(doc.at_css('a').classes).to include('gfm')
+      expect(doc.at_css('a')['data-link']).to eq('true')
     end
 
     it 'rewrites the link correctly for subgroup' do
@@ -135,6 +145,7 @@ describe Banzai::Filter::UploadLinkFilter do
 
       expect(doc.at_css('a')['href']).to eq(relative_path)
       expect(doc.at_css('a').classes).to include('gfm')
+      expect(doc.at_css('a')['data-link']).to eq('true')
     end
 
     it 'does not modify absolute URL' do
@@ -142,6 +153,7 @@ describe Banzai::Filter::UploadLinkFilter do
 
       expect(doc.at_css('a')['href']).to eq 'http://example.com'
       expect(doc.at_css('a').classes).not_to include('gfm')
+      expect(doc.at_css('a')['data-link']).not_to eq('true')
     end
   end
 
@@ -159,6 +171,7 @@ describe Banzai::Filter::UploadLinkFilter do
 
         expect(doc.at_css('a')['href']).to eq(absolute_path)
         expect(doc.at_css('a').classes).to include('gfm')
+        expect(doc.at_css('a')['data-link']).to eq('true')
       end
     end
 
@@ -178,6 +191,7 @@ describe Banzai::Filter::UploadLinkFilter do
 
           expect(doc.at_css('a')['href']).to eq(absolute_path)
           expect(doc.at_css('a').classes).to include('gfm')
+          expect(doc.at_css('a')['data-link']).to eq('true')
         end
       end
 
@@ -186,6 +200,7 @@ describe Banzai::Filter::UploadLinkFilter do
 
         expect(doc.at_css('a')['href']).to eq(gitlab_root + relative_path)
         expect(doc.at_css('a').classes).to include('gfm')
+        expect(doc.at_css('a')['data-link']).to eq('true')
       end
     end
 
@@ -194,6 +209,7 @@ describe Banzai::Filter::UploadLinkFilter do
 
       expect(doc.at_css('a')['href']).to eq(relative_path)
       expect(doc.at_css('a').classes).to include('gfm')
+      expect(doc.at_css('a')['data-link']).to eq('true')
     end
 
     it 'does not modify absolute URL' do
@@ -201,6 +217,7 @@ describe Banzai::Filter::UploadLinkFilter do
 
       expect(doc.at_css('a')['href']).to eq 'http://example.com'
       expect(doc.at_css('a').classes).not_to include('gfm')
+      expect(doc.at_css('a')['data-link']).not_to eq('true')
     end
   end