2 files changed, 21 insertions, 0 deletions

diff --git a/app/models/node.rb b/app/models/node.rb
index f8c29b48..4b7c9772 100644
--- a/app/models/node.rb
+++ b/app/models/node.rb
@@ -42,6 +42,9 @@ class Node < ApplicationRecord
             :inclusion   => { :in => ->(_) { Page.custom_templates } },
             :allow_blank => true,
             :if          => :default_template_name_changed?
+  validates :external_url, :format => { :with => %r{\Ahttps?://}i,
+                                        :allow_blank => true,
+                                        :message => :must_be_http }
 
   # Everything outside the Trash subtree, the Trash node included.
   # Relies on unique_name being authoritative for tree position --
@@ -605,6 +608,23 @@ class Node < ApplicationRecord
     self.created_at < new_id_format_date ? unique_path : id
   end
 
+  def update_external_url!(url, current_user = nil)
+    normalised = url.presence
+    return false if normalised == external_url
+
+    guard_live_change!(current_user)
+    previous = external_url
+
+    transaction do
+      update!(:external_url => normalised)
+      NodeAction.record!(:node => self, :user => current_user,
+                         :action => "node_external_url",
+                         :path => unique_name,
+                         :external_url => { "from" => previous, "to" => normalised })
+    end
+    true
+  end
+
   # Full-text search across all locale translations using PostgreSQL tsvector.
   # Uses 'simple' dictionary (no stemming, no stopwords) so queries work
   # across German and English content without language detection.
diff --git a/app/models/node_action.rb b/app/models/node_action.rb
index bfa469b1..f1e4eaea 100644
--- a/app/models/node_action.rb
+++ b/app/models/node_action.rb
@@ -134,6 +134,7 @@ class NodeAction < ApplicationRecord
   #                    from the node verbs' "tags", which is a pair,
   #                    so one renderer cannot mistake the other.
   #   "path"        -- the node's unique_name, when it has a node
+  #   "external_url" -- pair
   #
   # On "event_update" only, and only when something changed -- an
   # update that changes nothing records no entry at all: