From d3538718b9047f259f3999e01309ffd839fbb534 Mon Sep 17 00:00:00 2001
From: AJ ONeal <coolaj86@gmail.com>
Date: Fri, 22 Jul 2011 13:21:23 -0600
Subject: [PATCH] localStorage for Node.JS

---
 README.md           | 40 +++++++++++++++++++++++++++++++++
 lib/localStorage.js | 54 +++++++++++++++++++++++++++++++++++++++++++++
 lib/package.json    | 16 ++++++++++++++
 tests/test.js       | 34 ++++++++++++++++++++++++++++
 4 files changed, 144 insertions(+)
 create mode 100644 README.md
 create mode 100644 lib/localStorage.js
 create mode 100644 lib/package.json
 create mode 100644 tests/test.js

diff --git a/README.md b/README.md
new file mode 100644
index 0000000..f4c4a4b
--- /dev/null
+++ b/README.md
@@ -0,0 +1,40 @@
+localStorage
+===
+
+An inefficient, but as W3C-compliant as possible using only pure JavaScript, `localStorage` implementation.
+
+    var localStorage = require('localStorage');
+
+API
+
+  * getItem(key)
+  * setItem(key, value)
+  * removeItem(key)
+  * clear()
+  * key(n)
+  * length
+
+Tests
+
+    0 === localStorage.length;
+    null === localStorage.getItem('doesn't exist');
+    undefined === localStorage['doesn't exist'];
+
+    localStorage.setItem('myItem');
+    "undefined" === localStorage.getItem('myItem');
+    1 === localStorage.length;
+
+    localStorage.setItem('myItem', 0);
+    "0" === localStorage.getItem('myItem');
+
+    localStorage.removeItem('myItem', 0);
+    0 === localStorage.length;
+
+    localStorage.clear();
+    0 === localStorage.length;
+
+TODO / Bugs
+---
+
+  Does not persist.
+  Doesn't not emit `Storage` events
diff --git a/lib/localStorage.js b/lib/localStorage.js
new file mode 100644
index 0000000..4a74dff
--- /dev/null
+++ b/lib/localStorage.js
@@ -0,0 +1,54 @@
+// http://www.rajdeepd.com/articles/chrome/localstrg/LocalStorageSample.htm
+
+// NOTE:
+// this varies from actual localStorage in some subtle ways
+
+// also, there is no persistence
+// TODO persist
+(function () {
+  "use strict";
+
+  var db;
+
+  function LocalStorage() {
+  }
+  db = LocalStorage;
+
+  db.prototype.getItem = function (key) {
+    if (key in this) {
+      return String(this[key]);
+    }
+    return null;
+  };
+
+  db.prototype.setItem = function (key, val) {
+    this[key] = String(val);
+  };
+
+  db.prototype.removeItem = function (key) {
+    delete this[key];
+  };
+
+  db.prototype.clear = function () {
+    var self = this;
+    Object.keys(self).forEach(function (key) {
+      self[key] = undefined;
+      delete self[key];
+    });
+  };
+
+  db.prototype.key = function (i) {
+    i = i || 0;
+    return Object.keys(this)[i];
+  };
+
+  db.prototype.__defineGetter__('length', function () {
+    return Object.keys(this).length;
+  });
+
+  if (global.localStorage) {
+    module.exports = localStorage;
+  } else {
+    module.exports = new LocalStorage();
+  }
+}());
diff --git a/lib/package.json b/lib/package.json
new file mode 100644
index 0000000..2d96f56
--- /dev/null
+++ b/lib/package.json
@@ -0,0 +1,16 @@
+{
+  "author": "AJ ONeal <coolaj86@gmail.com> (http://coolaj86.info)",
+  "name": "localStorage",
+  "description": "W3C localStorage for Node.JS",
+  "version": "1.0.0",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/coolaj86/node-localStorage.git"
+  },
+  "engines": {
+    "node": ">= v0.2.0"
+  },
+  "main": "localStorage.js",
+  "dependencies": {},
+  "devDependencies": {}
+}
diff --git a/tests/test.js b/tests/test.js
new file mode 100644
index 0000000..07d8330
--- /dev/null
+++ b/tests/test.js
@@ -0,0 +1,34 @@
+(function () {
+  "use strict";
+
+  var assert = require('assert')
+    , localStorage = require('localStorage')
+    ;
+
+  // can't make assuptions about key positioning
+  localStorage.setItem('a', 1);
+  assert.strictEqual(localStorage.key(0), 'a');
+
+  localStorage.setItem('b', '2');
+  assert.strictEqual(localStorage.getItem('a'), '1');
+  assert.strictEqual(localStorage.getItem('b'), '2');
+  assert.strictEqual(localStorage.length, 2);
+
+  assert.strictEqual(localStorage['c'], undefined);
+  assert.strictEqual(localStorage.getItem('c'), null);
+
+  localStorage.setItem('c');
+  assert.strictEqual(localStorage.getItem('c'), "undefined");
+  assert.strictEqual(localStorage.length, 3);
+
+  localStorage.removeItem('c');
+  assert.strictEqual(localStorage.getItem('c'), null);
+  assert.strictEqual(localStorage.length, 2);
+
+  localStorage.clear();
+  assert.strictEqual(localStorage.getItem('a'), null);
+  assert.strictEqual(localStorage.getItem('b'), null);
+  assert.strictEqual(localStorage.length, 0);
+
+  console.log('All tests passed');
+}());