1 files changed, 81 insertions, 0 deletions
diff --git a/includes/js/dojo/data/util/sorter.js b/includes/js/dojo/data/util/sorter.js
new file mode 100644
index 0000000..e13fedc
--- /dev/null
+++ b/includes/js/dojo/data/util/sorter.js
@@ -0,0 +1,81 @@
+if(!dojo._hasResource["dojo.data.util.sorter"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
+dojo._hasResource["dojo.data.util.sorter"] = true;
+dojo.provide("dojo.data.util.sorter");
+
+dojo.data.util.sorter.basicComparator = function(	/*anything*/ a, 
+													/*anything*/ b){
+	//	summary:  
+	//		Basic comparision function that compares if an item is greater or less than another item
+	//	description:  
+	//		returns 1 if a > b, -1 if a < b, 0 if equal.
+	//		undefined values are treated as larger values so that they're pushed to the end of the list.
+
+	var ret = 0;
+	if(a > b || typeof a === "undefined" || a === null){
+		ret = 1;
+	}else if(a < b || typeof b === "undefined" || b === null){
+		ret = -1;
+	}
+	return ret; //int, {-1,0,1}
+};
+
+dojo.data.util.sorter.createSortFunction = function(	/* attributes array */sortSpec,
+														/*dojo.data.core.Read*/ store){
+	//	summary:  
+	//		Helper function to generate the sorting function based off the list of sort attributes.
+	//	description:  
+	//		The sort function creation will look for a property on the store called 'comparatorMap'.  If it exists
+	//		it will look in the mapping for comparisons function for the attributes.  If one is found, it will
+	//		use it instead of the basic comparator, which is typically used for strings, ints, booleans, and dates.
+	//		Returns the sorting function for this particular list of attributes and sorting directions.
+	//
+	//	sortSpec: array
+	//		A JS object that array that defines out what attribute names to sort on and whether it should be descenting or asending.
+	//		The objects should be formatted as follows:
+	//		{
+	//			attribute: "attributeName-string" || attribute,
+	//			descending: true|false;   // Default is false.
+	//		}
+	//	store: object
+	//		The datastore object to look up item values from.
+	//
+	var sortFunctions=[];   
+
+	function createSortFunction(attr, dir){
+		return function(itemA, itemB){
+			var a = store.getValue(itemA, attr);
+			var b = store.getValue(itemB, attr);
+			//See if we have a override for an attribute comparison.
+			var comparator = null;
+			if(store.comparatorMap){
+				if(typeof attr !== "string"){
+					 attr = store.getIdentity(attr);
+				}
+				comparator = store.comparatorMap[attr]||dojo.data.util.sorter.basicComparator;
+			}
+			comparator = comparator||dojo.data.util.sorter.basicComparator; 
+			return dir * comparator(a,b); //int
+		};
+	}
+
+	for(var i = 0; i < sortSpec.length; i++){
+		sortAttribute = sortSpec[i];
+		if(sortAttribute.attribute){
+			var direction = (sortAttribute.descending) ? -1 : 1;
+			sortFunctions.push(createSortFunction(sortAttribute.attribute, direction));
+		}
+	}
+
+	return function(rowA, rowB){
+		var i=0;
+		while(i < sortFunctions.length){
+			var ret = sortFunctions[i++](rowA, rowB);
+			if(ret !== 0){
+				return ret;//int
+			}
+		}
+		return 0; //int  
+	};  //  Function
+};
+
+}