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/*
* jQuery Storage API Plugin
*
* Copyright (c) 2013 Julien Maurel
*
* Licensed under the MIT license:
* http://www.opensource.org/licenses/mit-license.php
*
* Project home:
* https://github.com/julien-maurel/jQuery-Storage-API
*
* Version: 1.5.0
*
*/
(function($){
// Prefix to use with cookie fallback
var cookie_local_prefix="ls_";
var cookie_session_prefix="ss_";
// Get items from a storage
function _get(storage){
var l=arguments.length,s=window[storage],a=arguments,a1=a[1],vi,ret,tmp;
if(l<2) throw new Error('Minimum 2 arguments must be given');
else if($.isArray(a1)){
// If second argument is an array, return an object with value of storage for each item in this array
ret={};
for(var i in a1){
vi=a1[i];
try{
ret[vi]=JSON.parse(s.getItem(vi));
}catch(e){
ret[vi]=s.getItem(vi);
}
}
return ret;
}else if(l==2){
// If only 2 arguments, return value directly
try{
return JSON.parse(s.getItem(a1));
}catch(e){
return s.getItem(a1);
}
}else{
// If more than 2 arguments, parse storage to retrieve final value to return it
// Get first level
try{
ret=JSON.parse(s.getItem(a1));
}catch(e){
throw new ReferenceError(a1+' is not defined in this storage');
}
// Parse next levels
for(var i=2;i<l-1;i++){
ret=ret[a[i]];
if(ret===undefined) throw new ReferenceError([].slice.call(a,1,i+1).join('.')+' is not defined in this storage');
}
// If last argument is an array, return an object with value for each item in this array
// Else return value normally
if($.isArray(a[i])){
tmp=ret;
ret={};
for(var j in a[i]){
ret[a[i][j]]=tmp[a[i][j]];
}
return ret;
}else{
return ret[a[i]];
}
}
}
// Set items of a storage
function _set(storage){
var l=arguments.length,s=window[storage],a=arguments,a1=a[1],a2=a[2],vi,to_store={},tmp;
if(l<2 || !$.isPlainObject(a1) && l<3) throw new Error('Minimum 3 arguments must be given or second parameter must be an object');
else if($.isPlainObject(a1)){
// If first argument is an object, set values of storage for each property of this object
for(var i in a1){
vi=a1[i];
if(!$.isPlainObject(vi)) s.setItem(i,vi);
else s.setItem(i,JSON.stringify(vi));
}
return a1;
}else if(l==3){
// If only 3 arguments, set value of storage directly
if(typeof a2==='object') s.setItem(a1,JSON.stringify(a2));
else s.setItem(a1,a2);
return a2;
}else{
// If more than 3 arguments, parse storage to retrieve final node and set value
// Get first level
try{
tmp=s.getItem(a1);
if(tmp!=null) {
to_store=JSON.parse(tmp);
}
}catch(e){
}
tmp=to_store;
// Parse next levels and set value
for(var i=2;i<l-2;i++){
vi=a[i];
if(!tmp[vi] || !$.isPlainObject(tmp[vi])) tmp[vi]={};
tmp=tmp[vi];
}
tmp[a[i]]=a[i+1];
s.setItem(a1,JSON.stringify(to_store));
return to_store;
}
}
// Remove items from a storage
function _remove(storage){
var l=arguments.length,s=window[storage],a=arguments,a1=a[1],to_store,tmp;
if(l<2) throw new Error('Minimum 2 arguments must be given');
else if($.isArray(a1)){
// If first argument is an array, remove values from storage for each item of this array
for(var i in a1){
s.removeItem(a1[i]);
}
return true;
}else if(l==2){
// If only 2 arguments, remove value from storage directly
s.removeItem(a1);
return true;
}else{
// If more than 2 arguments, parse storage to retrieve final node and remove value
// Get first level
try{
to_store=tmp=JSON.parse(s.getItem(a1));
}catch(e){
throw new ReferenceError(a1+' is not defined in this storage');
}
// Parse next levels and remove value
for(var i=2;i<l-1;i++){
tmp=tmp[a[i]];
if(tmp===undefined) throw new ReferenceError([].slice.call(a,1,i).join('.')+' is not defined in this storage');
}
// If last argument is an array,remove value for each item in this array
// Else remove value normally
if($.isArray(a[i])){
for(var j in a[i]){
delete tmp[a[i][j]];
}
}else{
delete tmp[a[i]];
}
s.setItem(a1,JSON.stringify(to_store));
return true;
}
}
// Remove all items from a storage
function _removeAll(storage, reinit_ns){
var keys=_keys(storage);
for(var i in keys){
_remove(storage,keys[i]);
}
// Reinitialize all namespace storages
if(reinit_ns){
for(var i in $.namespaceStorages){
_createNamespace(i);
}
}
}
// Check if items of a storage are empty
function _isEmpty(storage){
var l=arguments.length,a=arguments,s=window[storage],a1=a[1];
if(l==1){
// If only one argument, test if storage is empty
return (_keys(storage).length==0);
}else if($.isArray(a1)){
// If first argument is an array, test each item of this array and return true only if all items are empty
for(var i=0; i<a1.length;i++){
if(!_isEmpty(storage,a1[i])) return false;
}
return true;
}else{
// If more than 1 argument, try to get value and test it
try{
var v=_get.apply(this, arguments);
// Convert result to an object (if last argument is an array, _get return already an object) and test each item
if(!$.isArray(a[l-1])) v={'totest':v};
for(var i in v){
if(!(
($.isPlainObject(v[i]) && $.isEmptyObject(v[i])) ||
($.isArray(v[i]) && !v[i].length) ||
(!v[i])
)) return false;
}
return true;
}catch(e){
return true;
}
}
}
// Check if items of a storage exist
function _isSet(storage){
var l=arguments.length,a=arguments,s=window[storage],a1=a[1];
if(l<2) throw new Error('Minimum 2 arguments must be given');
if($.isArray(a1)){
// If first argument is an array, test each item of this array and return true only if all items exist
for(var i=0; i<a1.length;i++){
if(!_isSet(storage,a1[i])) return false;
}
return true;
}else{
// For other case, try to get value and test it
try{
var v=_get.apply(this, arguments);
// Convert result to an object (if last argument is an array, _get return already an object) and test each item
if(!$.isArray(a[l-1])) v={'totest':v};
for(var i in v){
if(!(v[i]!==undefined && v[i]!==null)) return false;
}
return true;
}catch(e){
return false;
}
}
}
// Get keys of a storage or of an item of the storage
function _keys(storage){
var l=arguments.length,s=window[storage],a=arguments,a1=a[1],keys=[],o={};
// If more than 1 argument, get value from storage to retrieve keys
// Else, use storage to retrieve keys
if(l>1){
o=_get.apply(this,a);
}else{
o=s;
}
if(o._cookie){
// If storage is a cookie, use $.cookie to retrieve keys
for(var key in $.cookie()){
if(key!='') {
keys.push(key.replace(o._prefix,''));
}
}
}else{
for(var i in o){
keys.push(i);
}
}
return keys;
}
// Create new namespace storage
function _createNamespace(name){
if(!name || typeof name!="string") throw new Error('First parameter must be a string');
if(!window.localStorage.getItem(name)) window.localStorage.setItem(name,'{}');
if(!window.sessionStorage.getItem(name)) window.sessionStorage.setItem(name,'{}');
var ns={
localStorage:$.extend({},$.localStorage,{_ns:name}),
sessionStorage:$.extend({},$.sessionStorage,{_ns:name})
};
if($.cookie){
if(!window.cookieStorage.getItem(name)) window.cookieStorage.setItem(name,'{}');
ns.cookieStorage=$.extend({},$.cookieStorage,{_ns:name});
}
$.namespaceStorages[name]=ns;
return ns;
}
// Namespace object
var storage={
_type:'',
_ns:'',
_callMethod:function(f,a){
var p=[this._type];
if(this._ns) p.push(this._ns);
[].push.apply(p,a);
return f.apply(this,p);
},
// Get items. If no parameters and storage have a namespace, return all namespace
get:function(){
return this._callMethod(_get,arguments);
},
// Set items
set:function(){
var l=arguments.length,a=arguments,a0=a[0];
if(l<1 || !$.isPlainObject(a0) && l<2) throw new Error('Minimum 2 arguments must be given or first parameter must be an object');
// If first argument is an object and storage is a namespace storage, set values individually
if($.isPlainObject(a0) && this._ns){
for(var i in a0){
_set(this._type,this._ns,i,a0[i]);
}
return a0;
}else{
r=this._callMethod(_set,a);
if(this._ns) return r[a0];
else return r;
}
},
// Delete items
remove:function(){
if(arguments.length<1) throw new Error('Minimum 1 argument must be given');
return this._callMethod(_remove,arguments);
},
// Delete all items
removeAll:function(reinit_ns){
if(this._ns){
_set(this._type,this._ns,{});
return true;
}else{
return _removeAll(this._type, reinit_ns);
}
},
// Items empty
isEmpty:function(){
return this._callMethod(_isEmpty,arguments);
},
// Items exists
isSet:function(){
if(arguments.length<1) throw new Error('Minimum 1 argument must be given');
return this._callMethod(_isSet,arguments);
},
// Get keys of items
keys:function(){
return this._callMethod(_keys,arguments);
}
};
// Use jquery.cookie for compatibility with old browsers and give access to cookieStorage
if($.cookie){
// sessionStorage is valid for one window/tab. To simulate that with cookie, we set a name for the window and use it for the name of the cookie
if(!window.name) window.name=Math.floor(Math.random()*100000000);
var cookie_storage={
_cookie:true,
_prefix:'',
_expires:null,
setItem:function(n,v){
$.cookie(this._prefix+n,v,{expires:this._expires});
},
getItem:function(n){
return $.cookie(this._prefix+n);
},
removeItem:function(n){
return $.removeCookie(this._prefix+n);
},
clear:function(){
for(var key in $.cookie()){
if(key!=''){
if(!this._prefix && key.indexOf(cookie_local_prefix)===-1 && key.indexOf(cookie_session_prefix)===-1 || this._prefix && key.indexOf(this._prefix)===0) {
$.removeCookie(key);
}
}
}
},
setExpires:function(e){
this._expires=e;
return this;
}
};
if(!window.localStorage){
window.localStorage=$.extend({},cookie_storage,{_prefix:cookie_local_prefix,_expires:365*10});
window.sessionStorage=$.extend({},cookie_storage,{_prefix:cookie_session_prefix+window.name+'_'});
}
window.cookieStorage=$.extend({},cookie_storage);
// cookieStorage API
$.cookieStorage=$.extend({},storage,{_type:'cookieStorage',setExpires:function(e){window.cookieStorage.setExpires(e); return this;}});
}
// Get a new API on a namespace
$.initNamespaceStorage=function(ns){ return _createNamespace(ns); };
// localStorage API
$.localStorage=$.extend({},storage,{_type:'localStorage'});
// sessionStorage API
$.sessionStorage=$.extend({},storage,{_type:'sessionStorage'});
// List of all namespace storage
$.namespaceStorages={};
// Remove all items in all storages
$.removeAllStorages=function(reinit_ns){
$.localStorage.removeAll(reinit_ns);
$.sessionStorage.removeAll(reinit_ns);
if($.cookieStorage) $.cookieStorage.removeAll(reinit_ns);
if(!reinit_ns){
$.namespaceStorages={};
}
}
})(jQuery);