New filter operator "recent"

Select tiddlers with a specified date field (default "modified") within the last N days (default 0, meaning today).

core/modules/filters/recent.js

@@ -0,0 +1,35 @@
+/*\
+title: $:/core/modules/filters/recent.js
+type: application/javascript
+module-type: filteroperator
+
+Filter operator that selects tiddlers with a specified date field within the last N days.
+
+\*/
+(function(){
+
+/*jslint node: true, browser: true */
+/*global $tw: false */
+"use strict";
+
+/*
+Export our filter function
+*/
+exports.recent = function(source,operator,options) {
+	var results = [],
+		fieldName = operator.suffix || "modified",
+		targetTimeStamp = (new Date()).setHours(0,0,0,0) - 1000*60*60*24*(parseInt(operator.operand,10)||0);
+	var isRecent = function(dateField) {
+			return targetTimeStamp <= (new Date(dateField)).setHours(0,0,0,0);
+		};
+	source(function(tiddler,title) {
+		if(tiddler && tiddler.fields[fieldName]) {
+			if(isRecent($tw.utils.parseDate(tiddler.fields[fieldName]))) {
+				results.push(title);
+			}
+		}
+	});
+	return results;
+};
+
+})();