Initial commit

lib/assets/javascripts/builder/components/local-storage/local-storage.js

@@ -0,0 +1,70 @@
+var storage = (function () {
+  var storageName = 'cdb';
+  var version = '0.1.0';
+  var mainStorageKey;
+  var initialized = false;
+  var userModel;
+
+  function init (key, opts) {
+    if (!key) {
+      throw new Error('key is required');
+    }
+
+    if (!userModel && !opts) {
+      throw new Error('userModel is required');
+    }
+
+    if (!userModel && opts && opts.userModel) {
+      userModel = opts.userModel;
+    }
+
+    mainStorageKey = key;
+    initialized = true;
+  }
+
+  function getKey (key) {
+    return [storageName, version, userModel.get('username'), mainStorageKey, key].join('.');
+  }
+
+  function isSupported () {
+    try {
+      return 'localStorage' in window && window['localStorage'] !== null;
+    } catch (e) {
+      return false;
+    }
+  }
+
+  return {
+    init: function (key, opts) {
+      if (!isSupported()) throw new Error('localStorage not supported in your browser');
+      init(key, opts);
+    },
+
+    get: function (key) {
+      if (!initialized) {
+        init();
+      }
+      var storageKey = getKey(key);
+      return localStorage[storageKey];
+    },
+
+    set: function (key, value) {
+      if (!initialized) {
+        init();
+      }
+      var storageKey = getKey(key);
+      localStorage[storageKey] = value;
+    },
+
+    delete: function (key) {
+      if (!initialized) {
+        init();
+      }
+
+      var storageKey = getKey(key);
+      delete localStorage[storageKey];
+    }
+  };
+})();
+
+module.exports = storage;