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(function() {
/* Start angularLocalStorage */
'use strict';
var angularLocalStorage = angular.module('LocalStorageModule', []);
angularLocalStorage.provider('localStorageService', function(){
// You should set a prefix to avoid overwriting any local storage variables from the rest of your app
// e.g. angularLocalStorage.constant('prefix', 'youAppName');
this.prefix = 'ls';
// Cookie options (usually in case of fallback)
// expiry = Number of days before cookies expire // 0 = Does not expire
// path = The web path the cookie represents
this.cookie = {
expiry: 30,
path: '/'
};
this.notify = {
setItem: true,
removeItem: false
};
this.setPrefix = function(prefix){
this.prefix = prefix;
};
this.setStorageCookie = function(exp, path){
this.cookie = {
expiry: exp,
path: path
};
};
this.setNotify = function(itemSet, itemRemove){
this.notify = {
setItem: itemSet,
removeItem: itemRemove
};
};
this.$get = ['$rootScope', function($rootScope){
var prefix = this.prefix;
// If there is a prefix set in the config lets use that with an appended period for readability
if (prefix.substr(-1) !== '.') {
prefix = !!prefix ? prefix + '.' : '';
}
// Checks the browser to see if local storage is supported
var browserSupportsLocalStorage = function () {
try {
var supported = ('localStorage' in window && window['localStorage'] !== null);
// When Safari (OS X or iOS) is in private browsing mode, it appears as though localStorage
// is available, but trying to call .setItem throws an exception.
//
// "QUOTA_EXCEEDED_ERR: DOM Exception 22: An attempt was made to add something to storage
// that exceeded the quota."
var key = prefix + '__' + Math.round(Math.random() * 1e7);
if (supported) {
localStorage.setItem(key, '');
localStorage.removeItem(key);
}
return true;
} catch (e) {
$rootScope.$broadcast('LocalStorageModule.notification.error', e.message);
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');
var addToLocalStorage = function (key, value) {
// If this browser does not support local storage use cookies
if (!browserSupportsLocalStorage()) {
$rootScope.$broadcast('LocalStorageModule.notification.warning', 'LOCAL_STORAGE_NOT_SUPPORTED');
if (notify.setItem) {
$rootScope.$broadcast('LocalStorageModule.notification.setitem', {key: key, newvalue: value, storageType: 'cookie'});
}
return addToCookies(key, value);
}
// Let's convert undefined values to null to get the value consistent
if (typeof value === "undefined") {
value = null;
}
try {
if (angular.isObject(value) || angular.isArray(value)) {
value = angular.toJson(value);
}
localStorage.setItem(prefix + key, value);
if (notify.setItem) {
$rootScope.$broadcast('LocalStorageModule.notification.setitem', {key: key, newvalue: value, storageType: 'localStorage'});
}
} catch (e) {
$rootScope.$broadcast('LocalStorageModule.notification.error', e.message);
return addToCookies(key, value);
}
return true;
};
// Directly get a value from local storage
// Example use: localStorageService.get('library'); // returns 'angular'
var getFromLocalStorage = function (key) {
if (!browserSupportsLocalStorage()) {
$rootScope.$broadcast('LocalStorageModule.notification.warning','LOCAL_STORAGE_NOT_SUPPORTED');
return getFromCookies(key);
}
var item = localStorage.getItem(prefix + key);
// angular.toJson will convert null to 'null', so a proper conversion is needed
// FIXME not a perfect solution, since a valid 'null' string can't be stored
if (!item || item === 'null') {
return null;
}
if (item.charAt(0) === "{" || item.charAt(0) === "[") {
return angular.fromJson(item);
}
return item;
};
// Remove an item from local storage
// Example use: localStorageService.remove('library'); // removes the key/value pair of library='angular'
var removeFromLocalStorage = function (key) {
if (!browserSupportsLocalStorage()) {
$rootScope.$broadcast('LocalStorageModule.notification.warning', 'LOCAL_STORAGE_NOT_SUPPORTED');
if (notify.removeItem) {
$rootScope.$broadcast('LocalStorageModule.notification.removeitem', {key: key, storageType: 'cookie'});
}
return removeFromCookies(key);
}
try {
localStorage.removeItem(prefix+key);
if (notify.removeItem) {
$rootScope.$broadcast('LocalStorageModule.notification.removeitem', {key: key, storageType: 'localStorage'});
}
} catch (e) {
$rootScope.$broadcast('LocalStorageModule.notification.error', e.message);
return removeFromCookies(key);
}
return true;
};
// Return array of keys for local storage
// Example use: var keys = localStorageService.keys()
var getKeysForLocalStorage = function () {
if (!browserSupportsLocalStorage()) {
$rootScope.$broadcast('LocalStorageModule.notification.warning', 'LOCAL_STORAGE_NOT_SUPPORTED');
return false;
}
var prefixLength = prefix.length;
var keys = [];
for (var key in localStorage) {
// Only return keys that are for this app
if (key.substr(0,prefixLength) === prefix) {
try {
keys.push(key.substr(prefixLength));
} catch (e) {
$rootScope.$broadcast('LocalStorageModule.notification.error', e.Description);
return [];
}
}
}
return keys;
};
// Remove all data for this app from local storage
// Example use: localStorageService.clearAll();
// Should be used mostly for development purposes
var clearAllFromLocalStorage = function () {
if (!browserSupportsLocalStorage()) {
$rootScope.$broadcast('LocalStorageModule.notification.warning', 'LOCAL_STORAGE_NOT_SUPPORTED');
return clearAllFromCookies();
}
var prefixLength = prefix.length;
for (var key in localStorage) {
// Only remove items that are for this app
if (key.substr(0,prefixLength) === prefix) {
try {
removeFromLocalStorage(key.substr(prefixLength));
} catch (e) {
$rootScope.$broadcast('LocalStorageModule.notification.error', e.message);
return clearAllFromCookies();
}
}
}
return true;
};
// Checks the browser to see if cookies are supported
var browserSupportsCookies = function() {
try {
return navigator.cookieEnabled ||
("cookie" in document && (document.cookie.length > 0 ||
(document.cookie = "test").indexOf.call(document.cookie, "test") > -1));
} catch (e) {
$rootScope.$broadcast('LocalStorageModule.notification.error', e.message);
return false;
}
};
// Directly adds a value to cookies
// Typically used as a fallback is local storage is not available in the browser
// Example use: localStorageService.cookie.add('library','angular');
var addToCookies = function (key, value) {
if (typeof value === "undefined") {
return false;
}
if (!browserSupportsCookies()) {
$rootScope.$broadcast('LocalStorageModule.notification.error', 'COOKIES_NOT_SUPPORTED');
return false;
}
try {
var expiry = '',
expiryDate = new Date();
if (value === null) {
// Mark that the cookie has expired one day ago
expiryDate.setTime(expiryDate.getTime() + (-1 * 24 * 60 * 60 * 1000));
expiry = "; expires=" + expiryDate.toGMTString();
value = '';
} else if (cookie.expiry !== 0) {
expiryDate.setTime(expiryDate.getTime() + (cookie.expiry * 24 * 60 * 60 * 1000));
expiry = "; expires=" + expiryDate.toGMTString();
}
if (!!key) {
document.cookie = prefix + key + "=" + encodeURIComponent(value) + expiry + "; path="+cookie.path;
}
} catch (e) {
$rootScope.$broadcast('LocalStorageModule.notification.error',e.message);
return false;
}
return true;
};
// Directly get a value from a cookie
// Example use: localStorageService.cookie.get('library'); // returns 'angular'
var getFromCookies = function (key) {
if (!browserSupportsCookies()) {
$rootScope.$broadcast('LocalStorageModule.notification.error', 'COOKIES_NOT_SUPPORTED');
return false;
}
var cookies = document.cookie.split(';');
for(var i=0;i < cookies.length;i++) {
var thisCookie = cookies[i];
while (thisCookie.charAt(0)===' ') {
thisCookie = thisCookie.substring(1,thisCookie.length);
}
if (thisCookie.indexOf(prefix + key + '=') === 0) {
return decodeURIComponent(thisCookie.substring(prefix.length + key.length + 1, thisCookie.length));
}
}
return null;
};
var removeFromCookies = function (key) {
addToCookies(key,null);
};
var clearAllFromCookies = function () {
var thisCookie = null, thisKey = null;
var prefixLength = prefix.length;
var cookies = document.cookie.split(';');
for(var i = 0; i < cookies.length; i++) {
thisCookie = cookies[i];
while (thisCookie.charAt(0) === ' ') {
thisCookie = thisCookie.substring(1, thisCookie.length);
}
var key = thisCookie.substring(prefixLength, thisCookie.indexOf('='));
removeFromCookies(key);
}
};
return {
isSupported: browserSupportsLocalStorage,
set: addToLocalStorage,
add: addToLocalStorage, //DEPRECATED
get: getFromLocalStorage,
keys: getKeysForLocalStorage,
remove: removeFromLocalStorage,
clearAll: clearAllFromLocalStorage,
cookie: {
set: addToCookies,
add: addToCookies, //DEPRECATED
get: getFromCookies,
remove: removeFromCookies,
clearAll: clearAllFromCookies
}
};
}]
});
}).call(this);