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LocalStore.js
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LocalStore.js
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/**
The LocalStore singleton.
@class TemplateStore
@constructor
**/
LocalStore = {
/**
This object stores all keys and their values.
@property keys
@type Object
@default {}
@example
{
name->myProperty: "myValue",
...
}
**/
keys: {},
/**
Keeps the dependencies for the keys in the store.
@property deps
@type Object
@default {}
@example
{
name->myProperty: new Tracker.Dependency,
...
}
**/
deps: {},
// METHODS
// PRIVATE
/**
Creates at least ones a `Tracker.Dependency` object to a key.
@method _ensureDeps
@private
@param {String} key the name of the key to add a dependecy tracker to
@return undefined
**/
_ensureDeps: function (key) {
if (!this.deps[key]){
this.deps[key] = new Tracker.Dependency;
}
},
set: function(key, value, options, callback){
this._ensureDeps(key);
// USE CHROME STORAGE
if(typeof chrome !== 'undefined' && chrome.storage) {
var item = {};
item[key] = value;
// set
chrome.storage.local.set(item, function(){
// re-run reactive functions
if(!options || options.reactive !== false)
this.deps[key].changed();
// run callbacks
if(_.isFunction(callback))
callback();
});
// USE LOCALSTORAGE
} else {
// stringify
if(_.isObject(value))
value = EJSON.stringify(value);
// set
// use try to prevent warnings from low cache storages
try {
localStorage.setItem(key, value);
} catch(e) {
}
// re-run reactive functions
if(!options || options.reactive !== false)
this.deps[key].changed();
// run callbacks
if(_.isFunction(callback))
callback();
}
},
get: function(key, options, callback){
this._ensureDeps(key);
// DEPEND REACTIVE FUNCTIONS
if(!options || options.reactive !== false)
this.deps[key].depend();
// use chrome storage
if(typeof chrome !== 'undefined' && chrome.storage) {
// get
chrome.storage.local.get(key, callback);
// USE LOCALSTORAGE
} else {
// get
var value = localStorage.getItem(key),
retunValue = value;
// try to parse
if(value && _.isString(value)) {
try {
retunValue = EJSON.parse(value);
} catch(error){
retunValue = value;
}
}
return retunValue;
}
}
}