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+/*
+ * Copyright (C) 2020 Yomichan Authors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+const fs = require('fs');
+const url = require('url');
+const path = require('path');
+const {JSZip} = require('./util');
+const {VM} = require('./vm');
+require('fake-indexeddb/auto');
+
+const chrome = {
+ runtime: {
+ getURL: (path2) => {
+ return url.pathToFileURL(path.join(__dirname, '..', 'ext', path2.replace(/^\//, ''))).href;
+ }
+ }
+};
+
+class Image {
+ constructor() {
+ this._src = '';
+ this._loadCallbacks = [];
+ }
+
+ get src() {
+ return this._src;
+ }
+
+ set src(value) {
+ this._src = value;
+ this._delayTriggerLoad();
+ }
+
+ get naturalWidth() {
+ return 100;
+ }
+
+ get naturalHeight() {
+ return 100;
+ }
+
+ addEventListener(eventName, callback) {
+ if (eventName === 'load') {
+ this._loadCallbacks.push(callback);
+ }
+ }
+
+ removeEventListener(eventName, callback) {
+ if (eventName === 'load') {
+ const index = this._loadCallbacks.indexOf(callback);
+ if (index >= 0) {
+ this._loadCallbacks.splice(index, 1);
+ }
+ }
+ }
+
+ async _delayTriggerLoad() {
+ await Promise.resolve();
+ for (const callback of this._loadCallbacks) {
+ callback();
+ }
+ }
+}
+
+async function fetch(url2) {
+ const filePath = url.fileURLToPath(url2);
+ await Promise.resolve();
+ const content = fs.readFileSync(filePath, {encoding: null});
+ return {
+ ok: true,
+ status: 200,
+ statusText: 'OK',
+ text: async () => Promise.resolve(content.toString('utf8')),
+ json: async () => Promise.resolve(JSON.parse(content.toString('utf8')))
+ };
+}
+
+class DatabaseVM extends VM {
+ constructor() {
+ super({
+ chrome,
+ Image,
+ fetch,
+ indexedDB: global.indexedDB,
+ IDBKeyRange: global.IDBKeyRange,
+ JSZip
+ });
+ this.context.window = this.context;
+ this.indexedDB = global.indexedDB;
+ }
+}
+
+module.exports = {
+ DatabaseVM
+};