REFS DEVOPS-272 Added v2.5 compatibility

lib/pipeline/expressions/WeekExpression.js

@@ -2,7 +2,7 @@
 
 /** 
  * A $week pipeline expression.
- * @see evaluate 
+ * @see evaluateInternal 
  * @class WeekExpression
  * @namespace mungedb-aggregate.pipeline.expressions
  * @module mungedb-aggregate
@@ -15,28 +15,24 @@ var WeekExpression = module.exports = function WeekExpression(){
 
 // DEPENDENCIES
 var Value = require("../Value"),
-	DayOfYearExpression = require("./DayOfYearExpression");
+	DayOfYearExpression = require("./DayOfYearExpression"),
+	Expression = require("./Expression");
 
 // PROTOTYPE MEMBERS
 proto.getOpName = function getOpName(){
 	return "$week";
 };
 
-proto.addOperand = function addOperand(expr) {
-	this.checkArgLimit(1);
-	base.prototype.addOperand.call(this, expr);
-};
-
 /** 
  * Takes a date and returns the week of the year as a number between 0 and 53. 
  * Weeks begin on Sundays, and week 1 begins with the first Sunday of the year. 
  * Days preceding the first Sunday of the year are in week 0. 
  * This behavior is the same as the “%U” operator to the strftime standard library function.
- * @method evaluate
+ * @method evaluateInternal
  **/
-proto.evaluate = function evaluate(doc) {
+proto.evaluateInternal = function evaluateInternal(doc) {
 	this.checkArgCount(1);
-	var date = this.operands[0].evaluate(doc),
+	var date = this.operands[0].evaluateInternal(doc),
 		dayOfWeek = date.getUTCDay(),
 		dayOfYear = DayOfYearExpression.getDateDayOfYear(date),
 		prevSundayDayOfYear = dayOfYear - dayOfWeek,	// may be negative
@@ -44,3 +40,6 @@ proto.evaluate = function evaluate(doc) {
 	// Return the zero based index of the week of the next sunday, equal to the one based index of the week of the previous sunday, which is to be returned.
 	return (nextSundayDayOfYear / 7) | 0; // also, the `| 0` here truncates this so that we return an integer
 };
+
+/** Register Expression */
+Expression.registerExpression("$week",WeekExpression.parse);