Onboarding for new libraries and new users

src/routes/main.cr

@@ -69,6 +69,13 @@ class MainRouter < Router
         continue_reading = @context.library.get_continue_reading_entries username
         recently_added = @context.library.get_recently_added_entries username
 
+        new_user = true
+        titles = @context.library.titles
+        titles.each { |t| new_user = false if t.load_percentage(username) > 0 }
+
+        empty_library = true
+        empty_library = false if titles.size > 0
+
         layout "home"
       rescue e
         @context.error e