batch.processArray

use batch.processArray in notifications.push and moveRecentReplies
added notification tests
added test for moveRecentReplies
clear group cache if a group is deleted

src/batch.js

@@ -16,7 +16,7 @@ var async = require('async'),
 			options = {};
 		}
 
-		callback = typeof callback === 'function' ? callback : function(){};
+		callback = typeof callback === 'function' ? callback : function() {};
 		options = options || {};
 
 		if (typeof process !== 'function') {
@@ -63,4 +63,52 @@ var async = require('async'),
 		);
 	};
 
+	Batch.processArray = function(array, process, options, callback) {
+		if (typeof options === 'function') {
+			callback = options;
+			options = {};
+		}
+
+		callback = typeof callback === 'function' ? callback : function() {};
+		options = options || {};
+
+		if (!Array.isArray(array) || !array.length) {
+			return callback();
+		}
+		if (typeof process !== 'function') {
+			return callback(new Error('[[error:process-not-a-function]]'));
+		}
+
+		var batch = options.batch || DEFAULT_BATCH_SIZE;
+		var start = 0;
+		var done = false;
+
+		async.whilst(
+			function() {
+				return !done;
+			},
+			function(next) {
+				var currentBatch = array.slice(start, start + batch);
+				if (!currentBatch.length) {
+					done = true;
+					return next();
+				}
+				process(currentBatch, function(err) {
+					if (err) {
+						return next(err);
+					}
+					start = start + batch;
+					if (options.interval) {
+						setTimeout(next, options.interval);
+					} else {
+						next();
+					}
+				});
+			},
+			function(err) {
+				callback(err);
+			}
+		);
+	};
+
 }(exports));