Initial commit

README.md

@@ -2,3 +2,24 @@ angular-local-storage
 =====================
 
 An Angular module that gives you access to the browsers local storage
+
+Remember to set your app name (settings.appName) in the settings at the beginning of localStorageModule.js.
+
+To do:
+- Make appName available to Angular for manipulation
+- Set cookies as a failback for browsers that do not support local storage
+
+Example use: 
+
+angular.module('yourModule', ['LocalStorageModule'])
+
+  .controller('yourCtrl', [
+    '$scope',
+    'localStorageService',
+    function($scope, localStorageService) {
+
+      // Start fresh
+      localStorageService.clearAll();
+      localStorageService.add('Favorite Sport','value');
+
+  }]);

localStorageModule.js

@@ -0,0 +1,89 @@
+var angularLocalStorage = angular.module('LocalStorageModule', []);
+
+// Lets set the name of your app before we start.
+// We can use this for prefixing the names of Local Storage variables
+var settings = {
+  appName: 'youAppNameHere'
+};
+
+angularLocalStorage.service('localStorageService', [function() {
+  
+  return {
+
+    // We will prepend the name of the app to the front of each value stored in local storage.
+    // This way we prevent any conflicts with any other data stored in the Local Storage
+    prefix: settings.appName + '.',
+
+    // Checks the browser to see if local storage is supported
+    isSupported: function () {
+      try {
+          return ('localStorage' in window && window['localStorage'] !== null);           
+      } catch (e) {
+          return false;
+      }
+    },
+
+    // Directly adds a value to local storage
+    // If local storage is not available in the browser use cookies
+    // Example use: localStorageService.add('library','angular');
+    add: function (key, value) {
+
+      // If this browser does not support local storage use cookies
+      if (!this.isSupported()) {
+        console.log('Cannot add to local storage. Get from cookies');
+        return false;
+      }
+
+      try {
+        localStorage.setItem(this.prefix+key, value);
+        //or localStorage[key] = value; //like associative arrays
+      } catch (e) {
+        console.error(e.Description);
+        return -1;
+      }
+    },
+
+    // Directly get a value from local storage
+    // Example use: localStorageService.get('library'); // returns 'angular'
+    get: function (key) {
+      if (!this.isSupported()) {
+        console.log('Cannot get from local storage. Use cookies');
+        return false;
+      }
+
+      return localStorage.getItem(this.prefix+key);
+       //or localStorage[key];
+    },
+
+    // Remove an item from local storage
+    // Example use: localStorageService.remove('library'); // removes the key/value pair of library='angular'
+    remove: function (key) {
+      if (!this.isSupported()) {
+        console.log('Cannot remove item from local storage. Remove from cookies');
+        return false;
+      }
+
+      return localStorage.removeItem(key);
+    },
+
+    // Remove all data for this app from local storage
+    // Example use: localStorageService.clearAll();
+    // Should be used mostly for development purposes
+    clearAll: function () {
+      if (!this.isSupported()) {
+        console.log('Cannot remove all items from local storage. Remove all app cookies');
+        return false;
+      }
+
+      var prefixLength = this.prefix.length;
+
+      for (var i in localStorage) {
+        // Only remove items that are for this app
+        if (i.substr(0,prefixLength) === this.prefix)
+          this.remove(i);
+      }
+    },
+
+  }
+
+}]);