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/*
* Copyright (C) 2023 Yomitan Authors
* Copyright (C) 2019-2022 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/>.
*/
import {querySelectorNotNull} from '../../dom/query-selector.js';
import {yomitan} from '../../yomitan.js';
export class StorageController {
/**
* @param {import('./persistent-storage-controller.js').PersistentStorageController} persistentStorageController
*/
constructor(persistentStorageController) {
/** @type {import('./persistent-storage-controller.js').PersistentStorageController} */
this._persistentStorageController = persistentStorageController;
/** @type {?StorageEstimate} */
this._mostRecentStorageEstimate = null;
/** @type {boolean} */
this._storageEstimateFailed = false;
/** @type {boolean} */
this._isUpdating = false;
/** @type {?NodeListOf<HTMLElement>} */
this._storageUsageNodes = null;
/** @type {?NodeListOf<HTMLElement>} */
this._storageQuotaNodes = null;
/** @type {?NodeListOf<HTMLElement>} */
this._storageUseFiniteNodes = null;
/** @type {?NodeListOf<HTMLElement>} */
this._storageUseInfiniteNodes = null;
/** @type {?NodeListOf<HTMLElement>} */
this._storageUseValidNodes = null;
/** @type {?NodeListOf<HTMLElement>} */
this._storageUseInvalidNodes = null;
}
/** */
prepare() {
this._storageUsageNodes = /** @type {NodeListOf<HTMLElement>} */ (document.querySelectorAll('.storage-usage'));
this._storageQuotaNodes = /** @type {NodeListOf<HTMLElement>} */ (document.querySelectorAll('.storage-quota'));
this._storageUseFiniteNodes = /** @type {NodeListOf<HTMLElement>} */ (document.querySelectorAll('.storage-use-finite'));
this._storageUseInfiniteNodes = /** @type {NodeListOf<HTMLElement>} */ (document.querySelectorAll('.storage-use-infinite'));
this._storageUseValidNodes = /** @type {NodeListOf<HTMLElement>} */ (document.querySelectorAll('.storage-use-valid'));
this._storageUseInvalidNodes = /** @type {NodeListOf<HTMLElement>} */ (document.querySelectorAll('.storage-use-invalid'));
/** @type {HTMLButtonElement} */
const storageRefreshButton = querySelectorNotNull(document, '#storage-refresh');
storageRefreshButton.addEventListener('click', this._onStorageRefreshButtonClick.bind(this), false);
yomitan.on('storageChanged', this._onStorageChanged.bind(this));
this._updateStats();
}
// Private
/** */
_onStorageRefreshButtonClick() {
this._updateStats();
}
/** */
_onStorageChanged() {
this._updateStats();
}
/** */
async _updateStats() {
if (this._isUpdating) { return; }
try {
this._isUpdating = true;
const estimate = await this._storageEstimate();
const valid = (estimate !== null);
// Firefox reports usage as 0 when persistent storage is enabled.
const finite = valid && ((typeof estimate.usage === 'number' && estimate.usage > 0) || !(await this._persistentStorageController.isStoragePeristent()));
if (finite) {
let {usage, quota} = estimate;
if (typeof usage !== 'number') { usage = 0; }
if (typeof quota !== 'number') { quota = 0; }
const usageString = this._bytesToLabeledString(usage);
const quotaString = this._bytesToLabeledString(quota);
for (const node of /** @type {NodeListOf<HTMLElement>} */ (this._storageUsageNodes)) {
node.textContent = usageString;
}
for (const node of /** @type {NodeListOf<HTMLElement>} */ (this._storageQuotaNodes)) {
node.textContent = quotaString;
}
}
this._setElementsVisible(this._storageUseFiniteNodes, valid && finite);
this._setElementsVisible(this._storageUseInfiniteNodes, valid && !finite);
this._setElementsVisible(this._storageUseValidNodes, valid);
this._setElementsVisible(this._storageUseInvalidNodes, !valid);
} finally {
this._isUpdating = false;
}
}
// Private
/**
* @returns {Promise<?StorageEstimate>}
*/
async _storageEstimate() {
if (this._storageEstimateFailed && this._mostRecentStorageEstimate === null) {
return null;
}
try {
const value = await navigator.storage.estimate();
this._mostRecentStorageEstimate = value;
return value;
} catch (e) {
this._storageEstimateFailed = true;
}
return null;
}
/**
* @param {number} size
* @returns {string}
*/
_bytesToLabeledString(size) {
const base = 1000;
const labels = [' bytes', 'KB', 'MB', 'GB', 'TB'];
const maxLabelIndex = labels.length - 1;
let labelIndex = 0;
while (size >= base && labelIndex < maxLabelIndex) {
size /= base;
++labelIndex;
}
const label = labelIndex === 0 ? `${size}` : size.toFixed(1);
return `${label}${labels[labelIndex]}`;
}
/**
* @param {?NodeListOf<HTMLElement>} elements
* @param {boolean} visible
*/
_setElementsVisible(elements, visible) {
if (elements === null) { return; }
visible = !visible;
for (const element of elements) {
element.hidden = visible;
}
}
}
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