97 lines
2.4 KiB
JavaScript
97 lines
2.4 KiB
JavaScript
define(function () {
|
|
/*
|
|
This module uses localStorage, which is synchronous, but exposes an
|
|
asyncronous API. This is so that we can substitute other storage
|
|
methods.
|
|
|
|
To override these methods, create another file at:
|
|
/customize/storage.js
|
|
*/
|
|
|
|
var Store = {};
|
|
|
|
// Store uses nodebacks...
|
|
Store.set = function (key, val, cb) {
|
|
localStorage.setItem(key, JSON.stringify(val));
|
|
cb();
|
|
};
|
|
|
|
// implement in alternative store
|
|
Store.setBatch = function (map, cb) {
|
|
Object.keys(map).forEach(function (key) {
|
|
localStorage.setItem(key, JSON.stringify(map[key]));
|
|
});
|
|
cb(void 0, map);
|
|
};
|
|
|
|
var safeGet = window.safeGet = function (key) {
|
|
var val = localStorage.getItem(key);
|
|
try {
|
|
return JSON.parse(val);
|
|
} catch (err) {
|
|
console.log(val);
|
|
console.error(err);
|
|
return val;
|
|
}
|
|
};
|
|
|
|
Store.get = function (key, cb) {
|
|
cb(void 0, safeGet(key));
|
|
};
|
|
|
|
// implement in alternative store
|
|
Store.getBatch = function (keys, cb) {
|
|
var res = {};
|
|
keys.forEach(function (key) {
|
|
res[key] = safeGet(key);
|
|
});
|
|
cb(void 0, res);
|
|
};
|
|
|
|
Store.remove = function (key, cb) {
|
|
localStorage.removeItem(key);
|
|
cb();
|
|
};
|
|
|
|
// implement in alternative store
|
|
Store.removeBatch = function (keys, cb) {
|
|
keys.forEach(function (key) {
|
|
localStorage.removeItem(key);
|
|
});
|
|
cb();
|
|
};
|
|
|
|
Store.keys = function (cb) {
|
|
cb(void 0, Object.keys(localStorage));
|
|
};
|
|
|
|
Store.ready = function (f) {
|
|
if (typeof(f) === 'function') {
|
|
f(void 0, Store);
|
|
}
|
|
};
|
|
|
|
var changeHandlers = Store.changeHandlers = [];
|
|
|
|
Store.change = function (f) {
|
|
if (typeof(f) !== 'function') {
|
|
throw new Error('[Store.change] callback must be a function');
|
|
}
|
|
changeHandlers.push(f);
|
|
|
|
if (changeHandlers.length === 1) {
|
|
// start listening for changes
|
|
window.addEventListener('storage', function (e) {
|
|
changeHandlers.forEach(function (f) {
|
|
f({
|
|
key: e.key,
|
|
oldValue: e.oldValue,
|
|
newValue: e.newValue,
|
|
});
|
|
});
|
|
});
|
|
}
|
|
};
|
|
|
|
return Store;
|
|
});
|