Example Umbraco /Base method to archive news pages if they are over 30 days. (Using uComponents' uQuery)

ArchiveNewsPages.cs

using uComponents.Core.uQueryExtensions;
using umbraco.presentation.umbracobase;

namespace Our.Umbraco
{
	[RestExtension("examples")]
	public class Examples
	{
		public static bool ArchiveNewsPages()
		{
			// get all the nodes that haven't been archived
			var nodes = uComponents.Core.uQuery.GetNodesByXPath("//NewsPage[@isDoc and string(archived) != '1']");

			// loop over each node
			foreach (var node in nodes)
			{
				// test if create date is over 30 days old...
				if (node.CreateDate.AddDays(30) < DateTime.Today)
				{
					// ... then set the property as archived.
					node.SetProperty("archived", true);
				}
			}

			// return some value since it's using /Base
			return true;
		}
	}
}