118 lines
3.9 KiB
JavaScript
118 lines
3.9 KiB
JavaScript
(function() {
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'use strict';
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var ls = angular.module('localStorage',[]);
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ls.factory("$store", ["$parse", function($parse){
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/**
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* Global Vars
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*/
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var storage = (typeof window.localStorage === 'undefined') ? undefined : window.localStorage,
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supported = !(typeof storage == 'undefined' || typeof window.JSON == 'undefined');
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if (!supported) {
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console.log('Warning: localStorage is not supported');
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}
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var privateMethods = {
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/**
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* Pass any type of a string from the localStorage to be parsed so it returns a usable version (like an Object)
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* @param res - a string that will be parsed for type
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* @returns {*} - whatever the real type of stored value was
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*/
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parseValue: function(res) {
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var val;
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try {
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val = JSON.parse(res);
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if (val === undefined){
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val = res;
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}
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if (val === 'true'){
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val = true;
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}
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if (val === 'false'){
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val = false;
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}
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if (parseFloat(val) == val && !angular.isObject(val)) {
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val = parseFloat(val);
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}
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} catch(e){
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val = res;
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}
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return val;
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}
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};
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var publicMethods = {
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/**
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* Set - lets you set a new localStorage key pair set
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* @param key - a string that will be used as the accessor for the pair
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* @param value - the value of the localStorage item
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* @returns {*} - will return whatever it is you've stored in the local storage
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*/
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set: function(key,value){
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if (!supported){
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console.log('Local Storage not supported');
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}
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var saver = JSON.stringify(value);
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storage.setItem(key, saver);
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return privateMethods.parseValue(saver);
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},
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/**
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* Get - lets you get the value of any pair you've stored
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* @param key - the string that you set as accessor for the pair
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* @returns {*} - Object,String,Float,Boolean depending on what you stored
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*/
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get: function(key){
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if (!supported){
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return null;
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}
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var item = storage.getItem(key);
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return privateMethods.parseValue(item);
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},
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/**
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* Remove - lets you nuke a value from localStorage
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* @param key - the accessor value
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* @returns {boolean} - if everything went as planned
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*/
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remove: function(key) {
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if (!supported){
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return false;
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}
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storage.removeItem(key);
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return true;
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},
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/**
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* Enumerate all keys
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*/
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enumerateKeys: function() {
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var keys = [];
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for (var i = 0, len = storage.length; i < len; ++i) {
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keys.push(storage.key(i));
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}
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return keys;
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},
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/**
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* Bind - lets you directly bind a localStorage value to a $scope variable
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* @param $scope - the current scope you want the variable available in
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* @param key - the name of the variable you are binding
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* @param def - the default value (OPTIONAL)
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* @returns {*} - returns whatever the stored value is
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*/
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bind: function ($scope, key, def) {
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if (def === undefined) {
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def = '';
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}
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if (publicMethods.get(key) === undefined || publicMethods.get(key) === null) {
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publicMethods.set(key, def);
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}
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$parse(key).assign($scope, publicMethods.get(key));
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$scope.$watch(key, function (val) {
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publicMethods.set(key, val);
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}, true);
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return publicMethods.get(key);
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}
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};
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return publicMethods;
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}]);
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})();
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