54 lines
1.7 KiB
JavaScript
54 lines
1.7 KiB
JavaScript
/*
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Copyright 2020 Bruno Windels <bruno@windels.cloud>
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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import {Transaction} from "./Transaction.js";
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import { STORE_MAP, STORE_NAMES } from "../common.js";
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export class Storage {
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constructor(initialStoreValues = {}) {
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this._validateStoreNames(Object.keys(initialStoreValues));
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this.storeNames = STORE_MAP;
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this._storeValues = STORE_NAMES.reduce((values, name) => {
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values[name] = initialStoreValues[name] || null;
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}, {});
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}
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_validateStoreNames(storeNames) {
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const idx = storeNames.findIndex(name => !STORE_MAP.hasOwnProperty(name));
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if (idx !== -1) {
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throw new Error(`Invalid store name ${storeNames[idx]}`);
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}
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}
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_createTxn(storeNames, writable) {
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this._validateStoreNames(storeNames);
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const storeValues = storeNames.reduce((values, name) => {
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return values[name] = this._storeValues[name];
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}, {});
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return Promise.resolve(new Transaction(storeValues, writable));
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}
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readTxn(storeNames) {
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// TODO: avoid concurrency
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return this._createTxn(storeNames, false);
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}
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readWriteTxn(storeNames) {
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// TODO: avoid concurrency
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return this._createTxn(storeNames, true);
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}
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}
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