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64 lines
1.5 KiB
JavaScript
64 lines
1.5 KiB
JavaScript
/*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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/**
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* Save something to persistent storage.
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* @param {string} key
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* @param {string} value non-string values are converted to strings.
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* @returns {undefined}
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*/
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function setStorage(key, value) {
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if (typeof value == "string") {
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localStorage.setItem(key, value);
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} else {
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localStorage.setItem(key, "JSON|" + JSON.stringify(value));
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}
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}
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/**
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* Get an item from persistent storage.
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* @param {type} key
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* @returns {DOMString}
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*/
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function getStorage(key) {
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var val = localStorage.getItem(key);
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if (typeof val == "string" && val.startsWith("JSON|")) {
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return JSON.parse(val.substr(5));
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} else {
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return val;
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}
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}
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function removeFromStorage(key) {
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localStorage.removeItem(key);
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}
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/**
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* Check if an item is in the persistent storage.
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* @param {string} key
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* @returns {Boolean}
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*/
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function inStorage(key) {
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return localStorage.getItem(key) != null;
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}
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/**
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* Get all item from persistent storage.
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* @returns {Array} [{key: "", value: ""},...]
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*/
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function getAllStorage() {
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var all = [];
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for (var key in localStorage) {
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if (localStorage.hasOwnProperty(key)) {
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all.push({
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key: key,
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value: getStorage(key)
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});
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}
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}
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return all;
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} |