78 lines
1.3 KiB
JavaScript
78 lines
1.3 KiB
JavaScript
(function () {
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"use strict";
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var db;
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function Stringify(obj) {
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var str;
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try {
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str = JSON.stringify(obj);
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} catch(e) {
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str = "";
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}
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return str;
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}
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function Parse(str) {
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var obj = null;
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try {
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obj = JSON.parse(str);
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} catch(e) {}
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return obj;
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}
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function JsonStorage(w3cStorage) {
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this.db = w3cStorage;
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this.keysAreDirty = true;
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}
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db = JsonStorage;
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db.prototype.clear = function () {
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this.keysAreDirty = true;
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self.keys().forEach(function (uuid) {
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this.remove(uuid);
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}, this);
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};
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db.prototype.remove = function (uuid) {
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this.keysAreDirty = true;
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this.db.removeItem(uuid);
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};
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db.prototype.get = function (uuid) {
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return Parse(this.db.getItem(uuid));
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};
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db.prototype.set = function (uuid, val) {
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this.keysAreDirty = true;
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return this.db.setItem(uuid, Stringify(val));
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};
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db.prototype.keys = function () {
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var i;
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if (!this.keysAreDirty) {
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return this.keys;
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}
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this.keys = [];
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for (i = 0; i < this.db.length; i += 1) {
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this.keys.push(this.db.key(i));
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}
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this.keysAreDirty = false;
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return this.keys.concat([]);
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};
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db.prototype.size = function () {
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return this.db.length;
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};
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function create(w3cStorage) {
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return new JsonStorage(w3cStorage);
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}
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module.exports = create;
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}());
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