chao
/
mini_cocopi


			
							123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116
							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <title>JSDoc: Source: storage.js</title>

    <script src="scripts/prettify/prettify.js"> </script>
    <script src="scripts/prettify/lang-css.js"> </script>
    <!--[if lt IE 9]>
      <script src="//html5shiv.googlecode.com/svn/trunk/html5.js"></script>
    <![endif]-->
    <link type="text/css" rel="stylesheet" href="styles/prettify-tomorrow.css">
    <link type="text/css" rel="stylesheet" href="styles/jsdoc-default.css">
</head>

<body>

<div id="main">

    <h1 class="page-title">Source: storage.js</h1>

    
    <section>
        <article>
            <pre class="prettyprint source linenums"><code>/**
 * Helper object for interfacing with the LocalStorage. The LocalStorage
 * browser API allows for offline storage. That API is very unsophisticated,
 * and is essentially a lame key-value store. This object sits on top
 * and provides a number of useful utilities, including rudimentarycache
 * cache expiration.
 *
 * @constructor
 * @this {LocalStorageWrapper}
 * @param {String} namespace - A namespace to use in grouping access to localstorage. This keeps access clean and organized, while also making it possible to have multiple LocalStorage connections.
 */
function LocalStorageWrapper(namespace) {
    this.namespace = namespace;
}
/**
 * A method for adding a key/value pair to LocalStorage.
 * Note that both parameters must be strings (JSON.stringify is your friend).
 *
 * @param {String} key - The name of the key.
 * @param {String} value - The value.
 */
LocalStorageWrapper.prototype.set =  function(key, value) {
    localStorage.setItem(namespace+"_"+key+"_value", value);
    localStorage.setItem(namespace+"_"+key+"_timestamp", $.now());
};

/**
 * A method for removing a key from LocalStorage.
 *
 * @param {String} key - The name of the key to remove.
 */
LocalStorageWrapper.prototype.remove = function(key) {
    localStorage.removeItem(namespace+"_"+key+"_value");
    localStorage.removeItem(namespace+"_"+key+"_timestamp");
};

/**
 * A method for retrieving the value associated with the given key.
 *
 * @param {String} key - The name of the key to retrieve the value for.
 */
LocalStorageWrapper.prototype.get = function(key) {
    return localStorage.getItem(namespace+"_"+key+"_value");
};

/**
 * A test for whether the given key is in LocalStorage.
 *
 * @param {String} key - The key to test existence for.
 */
LocalStorageWrapper.prototype.has = function(key) {
    return localStorage.getItem(namespace+"_"+key+"_value") !== null;
};

/**
 * A test for whether the server has the newer version. This function
 * assumes that the server trip takes about 5 seconds. This method
 * is largely deprecated.
 *
 * @param {String} key - The key to check.
 * @param {Integer} server_time - The server's time as an epoch (in milliseconds)
 */
LocalStorageWrapper.prototype.is_new = function(key, server_time) {
    var stored_time = localStorage.getItem(namespace+"_"+key+"_timestamp");
    return (server_time >= stored_time+5000);
};</code></pre>
        </article>
    </section>


</div>

<nav>
    <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="BlockPy.html">BlockPy</a></li><li><a href="BlockPyCorgis.html">BlockPyCorgis</a></li><li><a href="BlockPyDialog.html">BlockPyDialog</a></li><li><a href="BlockPyEditor.html">BlockPyEditor</a></li><li><a href="BlockPyEngine.html">BlockPyEngine</a></li><li><a href="BlockPyEnglish.html">BlockPyEnglish</a></li><li><a href="BlockPyFeedback.html">BlockPyFeedback</a></li><li><a href="BlockPyHistory.html">BlockPyHistory</a></li><li><a href="BlockPyPresentation.html">BlockPyPresentation</a></li><li><a href="BlockPyPrinter.html">BlockPyPrinter</a></li><li><a href="BlockPyServer.html">BlockPyServer</a></li><li><a href="BlockPyToolbar.html">BlockPyToolbar</a></li><li><a href="LocalStorageWrapper.html">LocalStorageWrapper</a></li><li><a href="PythonToBlocks.html">PythonToBlocks</a></li></ul><h3>Global</h3><ul><li><a href="global.html#BlockPyInterface">BlockPyInterface</a></li><li><a href="global.html#cloneNode">cloneNode</a></li><li><a href="global.html#encodeHTML">encodeHTML</a></li><li><a href="global.html#expandArray">expandArray</a></li><li><a href="global.html#EXTENDED_ERROR_EXPLANATION">EXTENDED_ERROR_EXPLANATION</a></li><li><a href="global.html#indent">indent</a></li><li><a href="global.html#instructor_module">instructor_module</a></li><li><a href="global.html#prettyPrintDateTime">prettyPrintDateTime</a></li><li><a href="global.html#randomInteger">randomInteger</a></li><li><a href="global.html#set_button_loaded">set_button_loaded</a></li><li><a href="global.html#timerGuard">timerGuard</a></li></ul>
</nav>

<br class="clear">

<footer>
    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.4.3</a> on Sun Mar 26 2017 09:45:03 GMT-0400 (Eastern Daylight Time)
</footer>

<script> prettyPrint(); </script>
<script src="scripts/linenumber.js"> </script>
</body>
</html>