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/*
* Copyright (C) 2021-2022 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. 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/>.
*/
class PersistentStorageController {
constructor() {
this._persistentStorageCheckbox = false;
}
async prepare() {
this._persistentStorageCheckbox = document.querySelector('#storage-persistent-checkbox');
this._persistentStorageCheckbox.addEventListener('change', this._onPersistentStorageCheckboxChange.bind(this), false);
if (!this._isPersistentStorageSupported()) { return; }
const info = document.querySelector('#storage-persistent-info');
if (info !== null) { info.hidden = false; }
const isStoragePeristent = await this.isStoragePeristent();
this._updateCheckbox(isStoragePeristent);
}
async isStoragePeristent() {
try {
return await navigator.storage.persisted();
} catch (e) {
// NOP
}
return false;
}
// Private
_onPersistentStorageCheckboxChange(e) {
const node = e.currentTarget;
if (node.checked) {
node.checked = false;
this._attemptPersistStorage();
} else {
node.checked = true;
}
}
async _attemptPersistStorage() {
let isStoragePeristent = false;
try {
isStoragePeristent = await navigator.storage.persist();
} catch (e) {
// NOP
}
this._updateCheckbox(isStoragePeristent);
const node = document.querySelector('#storage-persistent-fail-warning');
if (node !== null) { node.hidden = isStoragePeristent; }
yomichan.trigger('storageChanged');
}
_isPersistentStorageSupported() {
return isObject(navigator.storage) && typeof navigator.storage.persist === 'function';
}
_updateCheckbox(isStoragePeristent) {
this._persistentStorageCheckbox.checked = isStoragePeristent;
this._persistentStorageCheckbox.readOnly = isStoragePeristent;
}
}
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