140 lines
4.2 KiB
JavaScript
140 lines
4.2 KiB
JavaScript
/*
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* Copyright (C) 2019-2020 Alex Yatskov <alex@foosoft.net>
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* Author: Alex Yatskov <alex@foosoft.net>
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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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/*global apiGetEnvironmentInfo*/
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function storageBytesToLabeledString(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 function storageEstimate() {
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try {
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return (storageEstimate.mostRecent = await navigator.storage.estimate());
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} catch (e) {
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// NOP
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}
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return null;
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}
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storageEstimate.mostRecent = null;
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async function 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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async function storageInfoInitialize() {
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storagePersistInitialize();
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const {browser, platform} = await apiGetEnvironmentInfo();
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document.documentElement.dataset.browser = browser;
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document.documentElement.dataset.operatingSystem = platform.os;
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await storageShowInfo();
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document.querySelector('#storage-refresh').addEventListener('click', () => storageShowInfo(), false);
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}
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async function storageUpdateStats() {
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storageUpdateStats.isUpdating = true;
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const estimate = await 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 isStoragePeristent()));
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if (finite) {
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document.querySelector('#storage-usage').textContent = storageBytesToLabeledString(estimate.usage);
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document.querySelector('#storage-quota').textContent = storageBytesToLabeledString(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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storageUpdateStats.isUpdating = false;
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return valid;
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}
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storageUpdateStats.isUpdating = false;
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async function storageShowInfo() {
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storageSpinnerShow(true);
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const valid = await storageUpdateStats();
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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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storageSpinnerShow(false);
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}
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function storageSpinnerShow(show) {
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const spinner = $('#storage-spinner');
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if (show) {
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spinner.show();
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} else {
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spinner.hide();
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}
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}
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async function storagePersistInitialize() {
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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 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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storageShowInfo();
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} else {
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$('.storage-persist-fail-warning').removeClass('storage-hidden');
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}
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}, false);
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}
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