#399

backend/app/services/post_url_normaliser.rb

@@ -0,0 +1,13 @@
+class PostUrlNormaliser
+  def self.normalise raw_url
+    value = raw_url.to_s.strip
+    uri = URI.parse(value)
+    return nil unless uri.is_a?(URI::HTTP) && uri.host.present?
+
+    uri.host = uri.host.downcase
+    uri.path = uri.path.sub(/\/\z/, '') if uri.path.present?
+    uri.to_s
+  rescue URI::InvalidURIError
+    nil
+  end
+end