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68 lines
1.8 KiB
68 lines
1.8 KiB
define(["sugar-web/activity/activity", "sugar-web/env"], function (activity, env) {
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'use strict';
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// This is a helper module that allows to persist key/value data
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// using the standard localStorage object.
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//
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// Usage:
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// ------
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//
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// // 1. Setup:
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//
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// dictstore.init(onReadyCallback);
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//
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// // 2. Use localStorage directly, and then call save():
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//
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// var value = localStorage['key'];
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// localStorage['key'] = newValue;
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// dictstore.save(onSavedCallback);
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//
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var dictstore = {};
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dictstore.init = function (callback) {
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if (env.isStandalone()) {
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// In standalone mode, use localStorage as is.
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callback();
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} else {
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// In Sugar, set localStorage from the datastore.
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localStorage.clear();
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var onLoaded = function (error, metadata, jsonData) {
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var data = JSON.parse(jsonData);
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for (var i in data) {
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localStorage[i] = data[i];
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}
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callback();
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};
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activity.getDatastoreObject().loadAsText(onLoaded);
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}
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};
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// Internally, the key/values are stored as text in the Sugar
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// datastore, using the JSON format.
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dictstore.save = function (callback) {
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if (callback === undefined) {
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callback = function () {};
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}
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if (env.isStandalone()) {
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// In standalone mode, use localStorage as is.
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callback();
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} else {
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var datastoreObject = activity.getDatastoreObject();
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var jsonData = JSON.stringify(localStorage);
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datastoreObject.setDataAsText(jsonData);
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datastoreObject.save(function (error) {
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callback(error);
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});
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}
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};
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return dictstore;
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});
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