walnut.js/lib/com.daplie.walnut/daplie-scripts/canned-storage.js

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(function (exports) {
'use strict';
var CannedStorage;
var Oauth3 = (exports.OAUTH3 || require('./oauth3'));
function create(opts) {
var myInstance = {};
var conf = {
prefix: opts.namespace + '.'
};
Object.keys(CannedStorage.api).forEach(function (key) {
myInstance[key] = function () {
var args = Array.prototype.slice.call(arguments);
args.unshift(conf);
return CannedStorage.api[key].apply(null, args);
};
});
return myInstance;
}
var api = {
init: function (/*conf*/) {
// noop, reserved for future use
return Oauth3.PromiseA.resolve();
}
, get: function (conf, key) {
var val;
try {
val = JSON.parse(localStorage.getItem(conf.prefix + key) || null);
} catch(e) {
console.error("couldn't parse " + conf.prefix + key, localStorage.getItem(conf.prefix + key));
localStorage.removeItem(conf.prefix + key);
val = null;
}
// just because sometimes it happens...
if ('undefined' === val || 'null' === val) {
console.warn("got undefined for " + conf.prefix + key);
val = null;
}
return val && Oauth3.PromiseA.resolve(val) || Oauth3.PromiseA.reject();
}
, set: function (conf, key, val) {
try {
localStorage.setItem(conf.prefix + key, JSON.stringify(val));
return Oauth3.PromiseA.resolve();
} catch(e) {
console.error("couldn't stringify " + conf.prefix + key, val);
return Oauth3.PromiseA.reject(e);
}
}
, remove: function (conf, key) {
localStorage.removeItem(conf.prefix + key);
return Oauth3.PromiseA.resolve();
}
, clear: function (conf, account) {
var re;
var keys = [];
var i;
var key;
re = new RegExp('^'
// See http://stackoverflow.com/a/6969486/151312 for regexp escape explanation
+ conf.prefix.replace(/[\-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]/g, "\\$&")
+ (account || '')
);
for (i = 0; i < localStorage.length; i += 1) {
key = localStorage.key(i);
if (re.test(key) && !/\.(dev|developer)\./.test(key)) {
keys.push(key);
}
}
keys.forEach(function (key) {
localStorage.removeItem(key);
});
return Oauth3.PromiseA.resolve();
}
};
CannedStorage = {
create: create
, api: api
};
exports.CannedStorage = CannedStorage.CannedStorage = CannedStorage;
if ('undefined' !== typeof module) {
module.exports = CannedStorage;
}
}('undefined' !== typeof exports ? exports : window));