* Rename SettingsBackup to BackupController * Rename files to more closely match classes * Improve organization of script imports
132 lines
4.4 KiB
JavaScript
132 lines
4.4 KiB
JavaScript
/*
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* Copyright (C) 2019-2020 Yomichan Authors
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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class StorageController {
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constructor() {
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this._mostRecentStorageEstimate = null;
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this._storageEstimateFailed = false;
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this._isUpdating = false;
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}
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prepare() {
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this._preparePersistentStorage();
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this.updateStats();
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document.querySelector('#storage-refresh').addEventListener('click', this.updateStats.bind(this), false);
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}
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async updateStats() {
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try {
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this._isUpdating = true;
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const estimate = await this._storageEstimate();
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const valid = (estimate !== null);
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if (valid) {
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// Firefox reports usage as 0 when persistent storage is enabled.
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const finite = (estimate.usage > 0 || !(await this._isStoragePeristent()));
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if (finite) {
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document.querySelector('#storage-usage').textContent = this._bytesToLabeledString(estimate.usage);
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document.querySelector('#storage-quota').textContent = this._bytesToLabeledString(estimate.quota);
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}
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document.querySelector('#storage-use-finite').classList.toggle('storage-hidden', !finite);
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document.querySelector('#storage-use-infinite').classList.toggle('storage-hidden', finite);
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}
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document.querySelector('#storage-use').classList.toggle('storage-hidden', !valid);
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document.querySelector('#storage-error').classList.toggle('storage-hidden', valid);
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return valid;
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} finally {
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this._isUpdating = false;
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}
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}
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// Private
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async _preparePersistentStorage() {
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if (!(navigator.storage && navigator.storage.persist)) {
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// Not supported
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return;
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}
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const info = document.querySelector('#storage-persist-info');
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const button = document.querySelector('#storage-persist-button');
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const checkbox = document.querySelector('#storage-persist-button-checkbox');
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info.classList.remove('storage-hidden');
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button.classList.remove('storage-hidden');
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let persisted = await this._isStoragePeristent();
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checkbox.checked = persisted;
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button.addEventListener('click', async () => {
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if (persisted) {
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return;
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}
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let result = false;
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try {
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result = await navigator.storage.persist();
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} catch (e) {
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// NOP
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}
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if (result) {
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persisted = true;
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checkbox.checked = true;
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this.updateStats();
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} else {
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document.querySelector('.storage-persist-fail-warning').classList.remove('storage-hidden');
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}
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}, false);
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}
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async _storageEstimate() {
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if (this._storageEstimateFailed && this._mostRecentStorageEstimate === null) {
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return null;
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}
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try {
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const value = await navigator.storage.estimate();
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this._mostRecentStorageEstimate = value;
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return value;
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} catch (e) {
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this._storageEstimateFailed = true;
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}
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return null;
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}
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_bytesToLabeledString(size) {
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const base = 1000;
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const labels = [' bytes', 'KB', 'MB', 'GB'];
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let labelIndex = 0;
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while (size >= base) {
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size /= base;
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++labelIndex;
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}
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const label = labelIndex === 0 ? `${size}` : size.toFixed(1);
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return `${label}${labels[labelIndex]}`;
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}
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async _isStoragePeristent() {
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try {
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return await navigator.storage.persisted();
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} catch (e) {
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// NOP
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}
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return false;
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}
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}
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