Display 'Originally published' for canonical URLs (#8761)

app/helpers/articles_helper.rb

@@ -41,11 +41,12 @@ module ArticlesHelper
   end
 
   def should_show_crossposted_on?(article)
-    article.crossposted_at &&
+    article.canonical_url ||
+      (article.crossposted_at &&
       article.published_from_feed &&
       article.published &&
       article.published_at &&
-      article.feed_source_url.present?
+      article.feed_source_url.present?)
   end
 
   def get_host_without_www(url)

app/views/articles/show.html.erb

@@ -166,8 +166,8 @@
                 <em>
                   Originally published at
                   <a href="<%= @article.canonical_url || @article.feed_source_url %>" style="color:#1395b8"><%= get_host_without_www(@article.canonical_url || @article.feed_source_url) %></a>
-                  on
                   <% if @article.crossposted_at %>
+                    on
                     <time datetime="<%= (@article.originally_published_at || @article.published_at)&.utc&.iso8601 %>"><%= (@article.originally_published_at || @article.published_at)&.strftime("%b %d, %Y") %></time>
                   <% end %>
                 </em>

spec/views/articles_spec.rb

@@ -47,4 +47,11 @@ RSpec.describe "articles/show", type: :view do
     expect(rendered).to have_css("form#new_comment")
     expect(rendered).to have_css("input#submit-button")
   end
+
+  it "shows a note about the canonical URL" do
+    allow(article1).to receive(:canonical_url).and_return("https://example.com/lamas")
+    render
+    expect(rendered).to have_text("Originally published at")
+    expect(rendered).to have_text("example.com")
+  end
 end