1 files changed, 376 insertions, 0 deletions
diff --git a/ext/bg/js/settings/backup-controller.js b/ext/bg/js/settings/backup-controller.js
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+++ b/ext/bg/js/settings/backup-controller.js
@@ -0,0 +1,376 @@
+/*
+ * 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);
+    }
+}