Fix OG image previews: use ?photo= param so server can set correct og:imagev1.0

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

1 files changed, 18 insertions, 11 deletions

diff --git a/app.rb b/app.rb
index a609f75..dca8825 100644
--- a/app.rb
+++ b/app.rb
@@ -170,17 +170,9 @@ helpers do
   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
+    return nil unless @og_image_rel
+    type = @og_use_media ? 'media' : 'thumb'
+    "#{request.base_url}/#{type}/#{@og_image_rel}"
   end
 end
 
@@ -214,6 +206,21 @@ def browse_album(rel)
   @albums  = child_albums(dir, data)
   @entries = album_files(dir, data)
   @crumbs  = breadcrumbs(rel)
+
+  if params[:photo] && !params[:photo].empty?
+    photo_name    = File.basename(params[:photo])
+    @og_image_rel = rel.empty? ? photo_name : "#{rel}/#{photo_name}"
+    @og_use_media = true
+  else
+    first_img = @entries.find { |e| %i[image video].include?(e[:type]) }
+    @og_image_rel = if first_img
+      rel.empty? ? first_img[:name] : "#{rel}/#{first_img[:name]}"
+    else
+      cover = cover_candidates(dir).first
+      cover ? (rel.empty? ? cover : "#{rel}/#{cover}") : nil
+    end
+  end
+
   erb :album
 end