nodes_diff.rb in eco-helpers-2.7.12

- old
+ new

@@ -19,10 +19,11 @@
     attr_reader :original_tree
 
     def initialize(*args, original_tree:, **kargs, &block)
       super(*args, **kargs, &block)
       @original_tree = original_tree
+      mark_implicit_unarchive!
     end
 
     def diffs
       @diffs ||= super.select do |dff|
         # discard entries that are to be inserted and archived at the same time
@@ -93,15 +94,44 @@
         "  • #{count} nodes to archive"
       end
       msg.compact.join("\n")
     end
 
+    alias_method :unarchive_src, :unarchive
+
+    # @note we must unarchive destination parents that will get
+    #   some children as well
+    def unarchive
+      unarchive_src | @implicit_unarchive
+    end
+
     private
 
     def when_present(list, default = nil)
       raise ArgumentError, "Expecting block but not given" unless block_given?
       count = list.count
       return yield(count) if count&.positive?
       default
+    end
+
+    def mark_implicit_unarchive!
+      @implicit_unarchive = source_results.select do |result|
+        result.archived_prev && implicit_unarchive?(result)
+      end.tap do |results|
+        results.each(&:unarchive!)
+      end
+    end
+
+    def implicit_unarchive?(result)
+      [result.node_id, result.node_id_prev].compact.any? do |id|
+        target_parent_ids.include?(id)
+      end
+    end
+
+    def target_parent_ids
+      return @target_parent_ids if instance_variable_defined?(:@target_parent_ids)
+
+      @target_parent_ids  = insert.map(&:parent_id).uniq
+      @target_parent_ids |= move.map(&:parent_id)
     end
   end
 end