coolaj86/json-storage.js
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made more browser-friendly

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AJ ONeal 2014-01-26 14:25:42 -07:00
parent 4e61155c7e
commit 699f673b79
1 changed files with 31 additions and 59 deletions
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90
lib/index.js
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@ -1,11 +1,12 @@
(function () { /*jshint -W054 */
"use strict"; ;(function (exports) {
'use strict';
var Store var proto
, delim = ':' , delim = ':'
; ;
function Stringify(obj) { function stringify(obj) {
var str; var str;
try { try {
str = JSON.stringify(obj); str = JSON.stringify(obj);
@ -16,7 +17,7 @@
return str; return str;
} }
function Parse(str) { function parse(str) {
var obj = null; var obj = null;
try { try {
obj = JSON.parse(str); obj = JSON.parse(str);
@ -25,46 +26,19 @@
return obj; return obj;
} }
function escapeRegExp(str) { function JsonStorage(w3cStorage, namespace, opts) {
return str.replace(/[-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]/g, "\\$&"); var me = this
}
function upgradeStorage(jss, w3cs) {
var i
, key
, val
, json = {}
; ;
if (jss._store.getItem('_json-storage-namespaced_', true)) { if (!(this instanceof JsonStorage)) {
return; return new JsonStorage(w3cStorage, namespace, opts);
} }
// we can't modify the db while were reading or me._opts = opts || {};
// the keys will shift all over the place if (false === opts.stringify) {
for (i = 0; i < w3cs.length; i += 1) { me._stringify = false;
key = w3cs.key(i); } else {
try { me._stringify = true;
val = JSON.parse(w3cs.getItem(key));
} catch(e) {
return;
}
json[key] = val;
}
w3cs.clear();
Object.keys(json).forEach(function (key) {
jss.set(key, json[key]);
});
jss._store.setItem('_json-storage-namespaced_', true);
}
function JsonStorage(w3cStorage, namespace) {
// called without new or create
// global will be undefined
if (!this) {
return new JsonStorage(w3cStorage, namespace);
} }
// if we didn't always add at least the delimeter // if we didn't always add at least the delimeter
@ -76,34 +50,34 @@
this._store = w3cStorage; this._store = w3cStorage;
this._keysAreDirty = true; this._keysAreDirty = true;
this._keys = []; this._keys = [];
if (!this._store.getItem('_json-storage-namespaced_')) {
upgradeStorage(this, w3cStorage);
}
} }
Store = JsonStorage; proto = JsonStorage.prototype;
Store.prototype.clear = function () { proto.clear = function () {
this._keysAreDirty = true; this._keysAreDirty = true;
this.keys().forEach(function (key) { this.keys().forEach(function (key) {
this.remove(key); this.remove(key);
}, this); }, this);
}; };
Store.prototype.remove = function (key) { proto.remove = function (key) {
this._keysAreDirty = true; this._keysAreDirty = true;
this._store.removeItem(key + this._namespace); this._store.removeItem(key + this._namespace);
}; };
Store.prototype.get = function (key) { proto.get = function (key) {
return Parse(this._store.getItem(key + this._namespace)); var item = this._store.getItem(key + this._namespace)
;
return this._stringify && parse(item) || item;
}; };
Store.prototype.set = function (key, val) { proto.set = function (key, val) {
this._keysAreDirty = true; this._keysAreDirty = true;
return this._store.setItem(key + this._namespace, Stringify(val)); return this._store.setItem(key + this._namespace, this._stringify && stringify(val) || val);
}; };
Store.prototype.keys = function () { proto.keys = function () {
var i var i
, key , key
, delimAt , delimAt
@ -128,11 +102,11 @@
return this._keys.concat([]); return this._keys.concat([]);
}; };
Store.prototype.size = function () { proto.size = function () {
return this._store.length; return this._store.length;
}; };
Store.prototype.toJSON = function () { proto.toJSON = function () {
var json = {} var json = {}
; ;
@ -143,9 +117,7 @@
return json; return json;
}; };
Store.create = function (w3cStorage, namespace) { JsonStorage.create = JsonStorage;
return new JsonStorage(w3cStorage, namespace);
}
module.exports = Store; exports.JsonStorage = JsonStorage;
}()); }('undefined' !== typeof exports && exports || new Function('return this')()));