82 lines
2.8 KiB
JavaScript
82 lines
2.8 KiB
JavaScript
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// idb-keyval.js 3.2.0
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// https://github.com/jakearchibald/idb-keyval
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// Copyright 2016, Jake Archibald
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// Licensed under the Apache License, Version 2.0
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var idbKeyval = (function (exports) {
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'use strict';
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class Store {
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constructor(dbName = 'keyval-store', storeName = 'keyval') {
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this.storeName = storeName;
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this._dbp = new Promise((resolve, reject) => {
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const openreq = indexedDB.open(dbName, 1);
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openreq.onerror = () => reject(openreq.error);
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openreq.onsuccess = () => resolve(openreq.result);
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// First time setup: create an empty object store
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openreq.onupgradeneeded = () => {
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openreq.result.createObjectStore(storeName);
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};
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});
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}
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_withIDBStore(type, callback) {
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return this._dbp.then(db => new Promise((resolve, reject) => {
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const transaction = db.transaction(this.storeName, type);
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transaction.oncomplete = () => resolve();
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transaction.onabort = transaction.onerror = () => reject(transaction.error);
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callback(transaction.objectStore(this.storeName));
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}));
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}
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}
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let store;
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function getDefaultStore() {
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if (!store)
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store = new Store();
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return store;
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}
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function get(key, store = getDefaultStore()) {
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let req;
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return store._withIDBStore('readonly', store => {
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req = store.get(key);
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}).then(() => req.result);
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}
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function set(key, value, store = getDefaultStore()) {
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return store._withIDBStore('readwrite', store => {
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store.put(value, key);
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});
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}
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function del(key, store = getDefaultStore()) {
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return store._withIDBStore('readwrite', store => {
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store.delete(key);
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});
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}
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function clear(store = getDefaultStore()) {
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return store._withIDBStore('readwrite', store => {
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store.clear();
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});
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}
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function keys(store = getDefaultStore()) {
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const keys = [];
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return store._withIDBStore('readonly', store => {
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// This would be store.getAllKeys(), but it isn't supported by Edge or Safari.
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// And openKeyCursor isn't supported by Safari.
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(store.openKeyCursor || store.openCursor).call(store).onsuccess = function () {
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if (!this.result)
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return;
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keys.push(this.result.key);
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this.result.continue();
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};
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}).then(() => keys);
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}
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exports.Store = Store;
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exports.get = get;
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exports.set = set;
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exports.del = del;
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exports.clear = clear;
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exports.keys = keys;
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return exports;
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}({}));
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