Implement settings export

1 files changed, 122 insertions, 0 deletions

diff --git a/ext/bg/js/settings/backup.js b/ext/bg/js/settings/backup.js
new file mode 100644
index 00000000..6494cd65
--- /dev/null
+++ b/ext/bg/js/settings/backup.js
@@ -0,0 +1,122 @@
+/*
+ * Copyright (C) 2019  Alex Yatskov <alex@foosoft.net>
+ * Author: Alex Yatskov <alex@foosoft.net>
+ *
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+
+
+// Exporting
+
+let _settingsExportToken = null;
+let _settingsExportRevoke = null;
+const SETTINGS_EXPORT_CURRENT_VERSION = 0;
+
+function _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 function _getSettingsExportData(date) {
+    const optionsFull = await apiOptionsGetFull();
+    const environment = await apiGetEnvironmentInfo();
+
+    const fieldTemplatesDefault = profileOptionsGetDefaultFieldTemplates();
+
+    // Format options
+    for (const {options} of optionsFull.profiles) {
+        if (options.anki.fieldTemplates === fieldTemplatesDefault || !options.anki.fieldTemplates) {
+            delete options.anki.fieldTemplates; // Default
+        }
+    }
+
+    const data = {
+        version: SETTINGS_EXPORT_CURRENT_VERSION,
+        date: _getSettingsExportDateString(date, '-', ' ', ':', 6),
+        url: chrome.runtime.getURL('/'),
+        manifest: chrome.runtime.getManifest(),
+        environment,
+        userAgent: navigator.userAgent,
+        options: optionsFull
+    };
+
+    return data;
+}
+
+function _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 = '';
+        _settingsExportRevoke = null;
+    };
+    _settingsExportRevoke = revoke;
+
+    a.dispatchEvent(new MouseEvent('click'));
+    setTimeout(revoke, 60000);
+}
+
+async function _onSettingsExportClick() {
+    if (_settingsExportRevoke !== null) {
+        _settingsExportRevoke();
+        _settingsExportRevoke = null;
+    }
+
+    const date = new Date(Date.now());
+
+    const token = {};
+    _settingsExportToken = token;
+    const data = await _getSettingsExportData(date);
+    if (_settingsExportToken !== token) {
+        // A new export has been started
+        return;
+    }
+    _settingsExportToken = null;
+
+    const fileName = `yomichan-settings-${_getSettingsExportDateString(date, '-', '-', '-', 6)}.json`;
+    const blob = new Blob([JSON.stringify(data, null, 4)], {type: 'application/json'});
+    _saveBlob(blob, fileName);
+}
+
+
+// Setup
+
+window.addEventListener('DOMContentLoaded', () => {
+    document.querySelector('#settings-export').addEventListener('click', _onSettingsExportClick, false);
+}, false);