38 lines
1.1 KiB
JavaScript
38 lines
1.1 KiB
JavaScript
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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