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/*
* Copyright (C) 2019-2020 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. See 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
* apiGetEnvironmentInfo
*/
function storageBytesToLabeledString(size) {
const base = 1000;
const labels = [' bytes', 'KB', 'MB', 'GB'];
let labelIndex = 0;
while (size >= base) {
size /= base;
++labelIndex;
}
const label = labelIndex === 0 ? `${size}` : size.toFixed(1);
return `${label}${labels[labelIndex]}`;
}
async function storageEstimate() {
try {
return (storageEstimate.mostRecent = await navigator.storage.estimate());
} catch (e) {
// NOP
}
return null;
}
storageEstimate.mostRecent = null;
async function isStoragePeristent() {
try {
return await navigator.storage.persisted();
} catch (e) {
// NOP
}
return false;
}
async function storageInfoInitialize() {
storagePersistInitialize();
const {browser, platform} = await apiGetEnvironmentInfo();
document.documentElement.dataset.browser = browser;
document.documentElement.dataset.operatingSystem = platform.os;
await storageShowInfo();
document.querySelector('#storage-refresh').addEventListener('click', storageShowInfo, false);
}
async function storageUpdateStats() {
storageUpdateStats.isUpdating = true;
const estimate = await storageEstimate();
const valid = (estimate !== null);
if (valid) {
// Firefox reports usage as 0 when persistent storage is enabled.
const finite = (estimate.usage > 0 || !(await isStoragePeristent()));
if (finite) {
document.querySelector('#storage-usage').textContent = storageBytesToLabeledString(estimate.usage);
document.querySelector('#storage-quota').textContent = storageBytesToLabeledString(estimate.quota);
}
document.querySelector('#storage-use-finite').classList.toggle('storage-hidden', !finite);
document.querySelector('#storage-use-infinite').classList.toggle('storage-hidden', finite);
}
storageUpdateStats.isUpdating = false;
return valid;
}
storageUpdateStats.isUpdating = false;
async function storageShowInfo() {
storageSpinnerShow(true);
const valid = await storageUpdateStats();
document.querySelector('#storage-use').classList.toggle('storage-hidden', !valid);
document.querySelector('#storage-error').classList.toggle('storage-hidden', valid);
storageSpinnerShow(false);
}
function storageSpinnerShow(show) {
const spinner = $('#storage-spinner');
if (show) {
spinner.show();
} else {
spinner.hide();
}
}
async function storagePersistInitialize() {
if (!(navigator.storage && navigator.storage.persist)) {
// Not supported
return;
}
const info = document.querySelector('#storage-persist-info');
const button = document.querySelector('#storage-persist-button');
const checkbox = document.querySelector('#storage-persist-button-checkbox');
info.classList.remove('storage-hidden');
button.classList.remove('storage-hidden');
let persisted = await isStoragePeristent();
checkbox.checked = persisted;
button.addEventListener('click', async () => {
if (persisted) {
return;
}
let result = false;
try {
result = await navigator.storage.persist();
} catch (e) {
// NOP
}
if (result) {
persisted = true;
checkbox.checked = true;
storageShowInfo();
} else {
$('.storage-persist-fail-warning').removeClass('storage-hidden');
}
}, false);
}
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