Add Open Graph meta tags for social media link previews

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/app.rb b/app.rb
index 8cde4ff..a609f75 100644
--- a/app.rb
+++ b/app.rb
@@ -168,6 +168,20 @@ helpers do
     v = s.to_s.strip
     v.empty? ? nil : v
   end
+
+  def og_image_url
+    first_img = Array(@entries).find { |e| e[:type] == :image }
+    if first_img
+      fr = @rel.to_s.empty? ? first_img[:name] : "#{@rel}/#{first_img[:name]}"
+      return "#{request.base_url}/thumb/#{fr}"
+    end
+    first_album = Array(@albums).first
+    if first_album&.dig(:cover)
+      cr = @rel.to_s.empty? ? "#{first_album[:name]}/#{first_album[:cover]}" : "#{@rel}/#{first_album[:name]}/#{first_album[:cover]}"
+      return "#{request.base_url}/thumb/#{cr}"
+    end
+    nil
+  end
 end
 
 # ── Public routes ──────────────────────────────────────────────────────────────