organized level helpers ala mongo driver

src/database/level.js

@@ -69,4 +69,22 @@
 		}
 	};
 
+	var helpers = {};
+
+	helpers.iterator = function(fn, keys, value, callback) {
+		var results = [];
+
+		async.each(keys, function(key, next) {
+			module[fn](key, value, function(err, result) {
+				results.push(result);
+				next();
+			});
+		}, function(err) {
+			callback(err, results);
+		});
+	};
+
+	module.helpers = module.helpers || {};
+	module.helpers.level = helpers;
+
 }(exports));

src/database/level/hash.js

@@ -3,6 +3,8 @@
 var async = require('async');
 
 module.exports = function(db, module) {
+	var helpers = module.helpers.level;
+
 	module.setObject = function(key, obj, callback) {
 		async.parallel([
 			function(next) {
@@ -82,7 +84,7 @@ module.exports = function(db, module) {
 	};
 
 	module.getObjectsFields = function(keys, fields, callback) {
-		module.iterator('getObjectFields', keys, fields, callback);
+		helpers.iterator('getObjectFields', keys, fields, callback);
 	};
 
 	module.getObjectKeys = function(key, callback) {

src/database/level/list.js

@@ -1,6 +1,8 @@
 "use strict";
 
 module.exports = function(db, module) {
+	var helpers = module.helpers.level;
+	
 	module.listPrepend = function(key, value, callback) {
 		module.getListRange(key, 0, -1, function(err, list) {
 			var arr = list || [];

src/database/level/main.js

@@ -4,6 +4,8 @@ var nconf = require('nconf'),
 	async = require('async');
 
 module.exports = function(db, module) {
+	var helpers = module.helpers.level;
+	
 	module.close = function(callback) {
 		db.close(callback);
 	};
@@ -78,18 +80,5 @@ module.exports = function(db, module) {
 		// <__<
 	};
 
-	module.iterator = function(fn, keys, value, callback) {
-		var results = [];
-
-		async.each(keys, function(key, next) {
-			module[fn](key, value, function(err, result) {
-				results.push(result);
-				next();
-			});
-		}, function(err) {
-			callback(err, results);
-		});
-	};
-
 	return module;
 };

src/database/level/sets.js

@@ -3,6 +3,8 @@
 var async = require('async');
 
 module.exports = function(db, module) {
+	var helpers = module.helpers.level;
+
 	module.setAdd = function(key, value, callback) {
 		module.getListRange(key, 0, -1, function(err, set) {
 			if (set.indexOf(value) === -1) {
@@ -40,7 +42,7 @@ module.exports = function(db, module) {
 	};
 
 	module.isMemberOfSets = function(sets, value, callback) {
-		module.iterator('isSetMember', sets, value, callback);
+		helpers.iterator('isSetMember', sets, value, callback);
 	};
 
 	module.getSetMembers = function(key, callback) {

src/database/level/sorted.js

@@ -4,6 +4,8 @@ var async = require('async');
 
 
 module.exports = function(db, module) {
+	var helpers = module.helpers.level;
+	
 	module.sortedSetAdd = function(key, score, value, callback) {
 		module.getListRange(key, 0, -1, function(err, set) {
 			set = set.filter(function(a) {return a.value !== value.toString();});