implement asynchronous wrappers for localStorage api

customize.dist/store.js

@@ -0,0 +1,63 @@
+define(function () {
+    /*
+        This module uses localStorage, which is synchronous, but exposes an
+        asyncronous API. This is so that we can substitute other storage
+        methods.
+
+        To override these methods, create another file at:
+        /customize/storage.js
+    */
+
+    var Store = {};
+
+    // Store uses nodebacks...
+    Store.set = function (key, val, cb) {
+        localStorage.setItem(key, val);
+        cb(void 0, val);
+    };
+
+    // implement in alternative store
+    Store.setBatch = function (map, cb) {
+        Object.keys(map).forEach(function (key) {
+            localStorage.setItem(key, map[key]);
+        });
+        cb(void 0, map);
+    };
+
+    Store.get = function (key, cb) {
+        cb(void 0, localStorage.getItem(key));
+    };
+
+    // implement in alternative store
+    Store.getBatch = function (keys, cb) {
+        var res = {};
+        keys.forEach(function (key) {
+            res[key] = localStorage.getItem(key);
+        });
+        cb(void 0, res);
+    };
+
+    Store.remove = function (key, cb) {
+        localStorage.removeItem(key);
+        cb();
+    };
+
+    // implement in alternative store
+    Store.removeBatch = function (keys, cb) {
+        keys.forEach(function (key) {
+            localStorage.removeItem(key);
+        });
+        cb();
+    };
+
+    // implement in alternative store...
+    Store.dump = function (cb) {
+        var map = {};
+        Object.keys(localStorage).forEach(function (key) {
+            map[key] = localStorage.getItem(key);
+        });
+        cb(void 0, map);
+    };
+
+    return Store;
+});