69 lines
2 KiB
JavaScript
69 lines
2 KiB
JavaScript
/* global indexedDB */
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// Module for interacting with IndexedDB without Backbone IndexedDB adapter
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// and using promises. Revisit use of `idb` dependency as it might cover
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// this functionality.
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const { isObject, isNumber } = require('lodash');
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exports.open = (name, version, { onUpgradeNeeded } = {}) => {
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const request = indexedDB.open(name, version);
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return new Promise((resolve, reject) => {
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request.onblocked = () =>
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reject(new Error('Database blocked'));
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request.onupgradeneeded = (event) => {
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const hasRequestedSpecificVersion = isNumber(version);
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if (!hasRequestedSpecificVersion) {
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return;
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}
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const { newVersion, oldVersion } = event;
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if (onUpgradeNeeded) {
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const { transaction } = event.target;
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onUpgradeNeeded({ oldVersion, transaction });
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return;
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}
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reject(new Error('Database upgrade required:' +
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` oldVersion: ${oldVersion}, newVersion: ${newVersion}`));
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};
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request.onerror = event =>
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reject(event.target.error);
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request.onsuccess = (event) => {
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const connection = event.target.result;
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resolve(connection);
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};
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});
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};
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exports.completeTransaction = transaction =>
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new Promise((resolve, reject) => {
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transaction.addEventListener('abort', event => reject(event.target.error));
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transaction.addEventListener('error', event => reject(event.target.error));
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transaction.addEventListener('complete', () => resolve());
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});
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exports.getVersion = async (name) => {
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const connection = await exports.open(name);
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const { version } = connection;
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connection.close();
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return version;
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};
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exports.getCount = async ({ store } = {}) => {
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if (!isObject(store)) {
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throw new TypeError("'store' is required");
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}
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const request = store.count();
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return new Promise((resolve, reject) => {
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request.onerror = event =>
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reject(event.target.error);
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request.onsuccess = event =>
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resolve(event.target.result);
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});
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};
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