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+/*
+ * Copyright (C) 2019-2020 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. 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/>.
+ */
+
+/* global
+ * OptionsUtil
+ * api
+ */
+
+class BackupController {
+ constructor(settingsController) {
+ this._settingsController = settingsController;
+ this._settingsExportToken = null;
+ this._settingsExportRevoke = null;
+ this._currentVersion = 0;
+ }
+
+ prepare() {
+ document.querySelector('#settings-export').addEventListener('click', this._onSettingsExportClick.bind(this), false);
+ document.querySelector('#settings-import').addEventListener('click', this._onSettingsImportClick.bind(this), false);
+ document.querySelector('#settings-import-file').addEventListener('change', this._onSettingsImportFileChange.bind(this), false);
+ document.querySelector('#settings-reset').addEventListener('click', this._onSettingsResetClick.bind(this), false);
+ document.querySelector('#settings-reset-modal-confirm').addEventListener('click', this._onSettingsResetConfirmClick.bind(this), false);
+ }
+
+ // Private
+
+ _getSettingsExportDateString(date, dateSeparator, dateTimeSeparator, timeSeparator, resolution) {
+ const values = [
+ date.getUTCFullYear().toString(),
+ dateSeparator,
+ (date.getUTCMonth() + 1).toString().padStart(2, '0'),
+ dateSeparator,
+ date.getUTCDate().toString().padStart(2, '0'),
+ dateTimeSeparator,
+ date.getUTCHours().toString().padStart(2, '0'),
+ timeSeparator,
+ date.getUTCMinutes().toString().padStart(2, '0'),
+ timeSeparator,
+ date.getUTCSeconds().toString().padStart(2, '0')
+ ];
+ return values.slice(0, resolution * 2 - 1).join('');
+ }
+
+ async _getSettingsExportData(date) {
+ const optionsFull = await this._settingsController.getOptionsFull();
+ const environment = await api.getEnvironmentInfo();
+ const fieldTemplatesDefault = await api.getDefaultAnkiFieldTemplates();
+
+ // Format options
+ for (const {options} of optionsFull.profiles) {
+ if (options.anki.fieldTemplates === fieldTemplatesDefault || !options.anki.fieldTemplates) {
+ delete options.anki.fieldTemplates; // Default
+ }
+ }
+
+ const data = {
+ version: this._currentVersion,
+ date: this._getSettingsExportDateString(date, '-', ' ', ':', 6),
+ url: chrome.runtime.getURL('/'),
+ manifest: chrome.runtime.getManifest(),
+ environment,
+ userAgent: navigator.userAgent,
+ options: optionsFull
+ };
+
+ return data;
+ }
+
+ _saveBlob(blob, fileName) {
+ if (typeof navigator === 'object' && typeof navigator.msSaveBlob === 'function') {
+ if (navigator.msSaveBlob(blob)) {
+ return;
+ }
+ }
+
+ const blobUrl = URL.createObjectURL(blob);
+
+ const a = document.createElement('a');
+ a.href = blobUrl;
+ a.download = fileName;
+ a.rel = 'noopener';
+ a.target = '_blank';
+
+ const revoke = () => {
+ URL.revokeObjectURL(blobUrl);
+ a.href = '';
+ this._settingsExportRevoke = null;
+ };
+ this._settingsExportRevoke = revoke;
+
+ a.dispatchEvent(new MouseEvent('click'));
+ setTimeout(revoke, 60000);
+ }
+
+ async _onSettingsExportClick() {
+ if (this._settingsExportRevoke !== null) {
+ this._settingsExportRevoke();
+ this._settingsExportRevoke = null;
+ }
+
+ const date = new Date(Date.now());
+
+ const token = {};
+ this._settingsExportToken = token;
+ const data = await this._getSettingsExportData(date);
+ if (this._settingsExportToken !== token) {
+ // A new export has been started
+ return;
+ }
+ this._settingsExportToken = null;
+
+ const fileName = `yomichan-settings-${this._getSettingsExportDateString(date, '-', '-', '-', 6)}.json`;
+ const blob = new Blob([JSON.stringify(data, null, 4)], {type: 'application/json'});
+ this._saveBlob(blob, fileName);
+ }
+
+ _readFileArrayBuffer(file) {
+ return new Promise((resolve, reject) => {
+ const reader = new FileReader();
+ reader.onload = () => resolve(reader.result);
+ reader.onerror = () => reject(reader.error);
+ reader.readAsArrayBuffer(file);
+ });
+ }
+
+ // Importing
+
+ async _settingsImportSetOptionsFull(optionsFull) {
+ await this._settingsController.setAllSettings(optionsFull);
+ }
+
+ _showSettingsImportError(error) {
+ yomichan.logError(error);
+ document.querySelector('#settings-import-error-modal-message').textContent = `${error}`;
+ $('#settings-import-error-modal').modal('show');
+ }
+
+ async _showSettingsImportWarnings(warnings) {
+ const modalNode = $('#settings-import-warning-modal');
+ const buttons = document.querySelectorAll('.settings-import-warning-modal-import-button');
+ const messageContainer = document.querySelector('#settings-import-warning-modal-message');
+ if (modalNode.length === 0 || buttons.length === 0 || messageContainer === null) {
+ return {result: false};
+ }
+
+ // Set message
+ const fragment = document.createDocumentFragment();
+ for (const warning of warnings) {
+ const node = document.createElement('li');
+ node.textContent = `${warning}`;
+ fragment.appendChild(node);
+ }
+ messageContainer.textContent = '';
+ messageContainer.appendChild(fragment);
+
+ // Show modal
+ modalNode.modal('show');
+
+ // Wait for modal to close
+ return new Promise((resolve) => {
+ const onButtonClick = (e) => {
+ e.preventDefault();
+ complete({
+ result: true,
+ sanitize: e.currentTarget.dataset.importSanitize === 'true'
+ });
+ modalNode.modal('hide');
+ };
+ const onModalHide = () => {
+ complete({result: false});
+ };
+
+ let completed = false;
+ const complete = (result) => {
+ if (completed) { return; }
+ completed = true;
+
+ modalNode.off('hide.bs.modal', onModalHide);
+ for (const button of buttons) {
+ button.removeEventListener('click', onButtonClick, false);
+ }
+
+ resolve(result);
+ };
+
+ // Hook events
+ modalNode.on('hide.bs.modal', onModalHide);
+ for (const button of buttons) {
+ button.addEventListener('click', onButtonClick, false);
+ }
+ });
+ }
+
+ _isLocalhostUrl(urlString) {
+ try {
+ const url = new URL(urlString);
+ switch (url.hostname.toLowerCase()) {
+ case 'localhost':
+ case '127.0.0.1':
+ case '[::1]':
+ switch (url.protocol.toLowerCase()) {
+ case 'http:':
+ case 'https:':
+ return true;
+ }
+ break;
+ }
+ } catch (e) {
+ // NOP
+ }
+ return false;
+ }
+
+ _settingsImportSanitizeProfileOptions(options, dryRun) {
+ const warnings = [];
+
+ const anki = options.anki;
+ if (isObject(anki)) {
+ const fieldTemplates = anki.fieldTemplates;
+ if (typeof fieldTemplates === 'string') {
+ warnings.push('anki.fieldTemplates contains a non-default value');
+ if (!dryRun) {
+ delete anki.fieldTemplates;
+ }
+ }
+ const server = anki.server;
+ if (typeof server === 'string' && server.length > 0 && !this._isLocalhostUrl(server)) {
+ warnings.push('anki.server uses a non-localhost URL');
+ if (!dryRun) {
+ delete anki.server;
+ }
+ }
+ }
+
+ const audio = options.audio;
+ if (isObject(audio)) {
+ const customSourceUrl = audio.customSourceUrl;
+ if (typeof customSourceUrl === 'string' && customSourceUrl.length > 0 && !this._isLocalhostUrl(customSourceUrl)) {
+ warnings.push('audio.customSourceUrl uses a non-localhost URL');
+ if (!dryRun) {
+ delete audio.customSourceUrl;
+ }
+ }
+ }
+
+ return warnings;
+ }
+
+ _settingsImportSanitizeOptions(optionsFull, dryRun) {
+ const warnings = new Set();
+
+ const profiles = optionsFull.profiles;
+ if (Array.isArray(profiles)) {
+ for (const profile of profiles) {
+ if (!isObject(profile)) { continue; }
+ const options = profile.options;
+ if (!isObject(options)) { continue; }
+
+ const warnings2 = this._settingsImportSanitizeProfileOptions(options, dryRun);
+ for (const warning of warnings2) {
+ warnings.add(warning);
+ }
+ }
+ }
+
+ return warnings;
+ }
+
+ _utf8Decode(arrayBuffer) {
+ try {
+ return new TextDecoder('utf-8').decode(arrayBuffer);
+ } catch (e) {
+ const binaryString = String.fromCharCode.apply(null, new Uint8Array(arrayBuffer));
+ return decodeURIComponent(escape(binaryString));
+ }
+ }
+
+ async _importSettingsFile(file) {
+ const dataString = this._utf8Decode(await this._readFileArrayBuffer(file));
+ const data = JSON.parse(dataString);
+
+ // Type check
+ if (!isObject(data)) {
+ throw new Error(`Invalid data type: ${typeof data}`);
+ }
+
+ // Version check
+ const version = data.version;
+ if (!(
+ typeof version === 'number' &&
+ Number.isFinite(version) &&
+ version === Math.floor(version)
+ )) {
+ throw new Error(`Invalid version: ${version}`);
+ }
+
+ if (!(
+ version >= 0 &&
+ version <= this._currentVersion
+ )) {
+ throw new Error(`Unsupported version: ${version}`);
+ }
+
+ // Verify options exists
+ let optionsFull = data.options;
+ if (!isObject(optionsFull)) {
+ throw new Error(`Invalid options type: ${typeof optionsFull}`);
+ }
+
+ // Upgrade options
+ optionsFull = await OptionsUtil.update(optionsFull);
+
+ // Check for warnings
+ const sanitizationWarnings = this._settingsImportSanitizeOptions(optionsFull, true);
+
+ // Show sanitization warnings
+ if (sanitizationWarnings.size > 0) {
+ const {result, sanitize} = await this._showSettingsImportWarnings(sanitizationWarnings);
+ if (!result) { return; }
+
+ if (sanitize !== false) {
+ this._settingsImportSanitizeOptions(optionsFull, false);
+ }
+ }
+
+ // Assign options
+ await this._settingsImportSetOptionsFull(optionsFull);
+ }
+
+ _onSettingsImportClick() {
+ document.querySelector('#settings-import-file').click();
+ }
+
+ async _onSettingsImportFileChange(e) {
+ const files = e.target.files;
+ if (files.length === 0) { return; }
+
+ const file = files[0];
+ e.target.value = null;
+ try {
+ await this._importSettingsFile(file);
+ } catch (error) {
+ this._showSettingsImportError(error);
+ }
+ }
+
+ // Resetting
+
+ _onSettingsResetClick() {
+ $('#settings-reset-modal').modal('show');
+ }
+
+ async _onSettingsResetConfirmClick() {
+ $('#settings-reset-modal').modal('hide');
+
+ // Get default options
+ const optionsFull = await OptionsUtil.getDefault();
+
+ // Assign options
+ await this._settingsImportSetOptionsFull(optionsFull);
+ }
+}