845 lines
26 KiB
JavaScript
Executable File
845 lines
26 KiB
JavaScript
Executable File
/* global tabURL handleEvent $ $$ prefs template FIREFOX chromeLocal debounce
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$create t API tWordBreak formatDate tryCatch tryJSONparse LZString
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ignoreChromeError download */
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'use strict';
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window.addEventListener('showStyles:done', function _() {
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window.removeEventListener('showStyles:done', _);
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if (!tabURL) {
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return;
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}
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//region Init
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const BODY_CLASS = 'search-results-shown';
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const RESULT_ID_PREFIX = 'search-result-';
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const BASE_URL = 'https://userstyles.org';
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const JSON_URL = BASE_URL + '/styles/chrome/';
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const API_URL = BASE_URL + '/api/v1/styles/';
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const UPDATE_URL = 'https://update.userstyles.org/%.md5';
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const STYLUS_CATEGORY = 'chrome-extension';
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const DISPLAY_PER_PAGE = 10;
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// Millisecs to wait before fetching next batch of search results.
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const DELAY_AFTER_FETCHING_STYLES = 0;
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// Millisecs to wait before fetching .JSON for next search result.
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const DELAY_BEFORE_SEARCHING_STYLES = 0;
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// update USO style install counter
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// if the style isn't uninstalled in the popup
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const PINGBACK_DELAY = 60e3;
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const BLANK_PIXEL_DATA = 'data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAA' +
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'C1HAwCAAAAC0lEQVR42mOcXQ8AAbsBHLLDr5MAAAAASUVORK5CYII=';
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const CACHE_SIZE = 1e6;
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const CACHE_PREFIX = 'usoSearchCache/';
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const CACHE_DURATION = 24 * 3600e3;
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const CACHE_CLEANUP_THROTTLE = 10e3;
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const CACHE_CLEANUP_NEEDED = CACHE_PREFIX + 'clean?';
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const CACHE_EXCEPT_PROPS = ['css', 'discussions', 'additional_info'];
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let searchTotalPages;
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let searchCurrentPage = 1;
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let searchExhausted = 0; // 1: once, 2: twice (first host.jp, then host)
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// currently active USO requests
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const xhrSpoofIds = new Set();
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// used as an HTTP header name to identify spoofed requests
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const xhrSpoofTelltale = getRandomId();
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const processedResults = [];
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const unprocessedResults = [];
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let loading = false;
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// Category for the active tab's URL.
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let category;
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let scrollToFirstResult = true;
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let displayedPage = 1;
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let totalPages = 1;
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let totalResults = 0;
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// fade-in when the entry took that long to replace its placeholder
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const FADEIN_THRESHOLD = 50;
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const dom = {};
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Object.assign($('#find-styles-link'), {
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href: BASE_URL + '/styles/browse/' + getCategory(),
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onclick(event) {
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if (!prefs.get('popup.findStylesInline') || dom.container) {
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handleEvent.openURLandHide.call(this, event);
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return;
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}
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event.preventDefault();
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this.textContent = this.title;
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this.title = '';
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init();
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load();
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},
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});
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return;
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function init() {
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setTimeout(() => document.body.classList.add(BODY_CLASS));
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$('#find-styles-inline-group').classList.add('hidden');
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dom.container = $('#search-results');
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dom.container.dataset.empty = '';
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dom.error = $('#search-results-error');
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dom.nav = {};
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const navOnClick = {prev, next};
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for (const place of ['top', 'bottom']) {
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const nav = $(`.search-results-nav[data-type="${place}"]`);
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nav.appendChild(template.searchNav.cloneNode(true));
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dom.nav[place] = nav;
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for (const child of $$('[data-type]', nav)) {
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const type = child.dataset.type;
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child.onclick = navOnClick[type];
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nav['_' + type] = child;
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}
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}
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dom.list = $('#search-results-list');
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addEventListener('scroll', loadMoreIfNeeded, {passive: true});
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if (FIREFOX) {
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let lastShift;
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addEventListener('resize', () => {
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const scrollbarWidth = window.innerWidth - document.scrollingElement.clientWidth;
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const shift = document.body.getBoundingClientRect().left;
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if (!scrollbarWidth || shift === lastShift) return;
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lastShift = shift;
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document.body.style.setProperty('padding',
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`0 ${scrollbarWidth + shift}px 0 ${-shift}px`, 'important');
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}, {passive: true});
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}
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addEventListener('styleDeleted', ({detail: {style: {id}}}) => {
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const result = processedResults.find(r => r.installedStyleId === id);
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if (result) {
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result.installed = false;
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result.installedStyleId = -1;
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window.clearTimeout(result.pingbackTimer);
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renderActionButtons($('#' + RESULT_ID_PREFIX + result.id));
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}
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});
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addEventListener('styleAdded', ({detail: {style: {id, md5Url}}}) => {
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const usoId = parseInt(md5Url && md5Url.match(/\d+|$/)[0]);
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const result = usoId && processedResults.find(r => r.id === usoId);
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if (result) {
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result.installed = true;
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result.installedStyleId = id;
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renderActionButtons($('#' + RESULT_ID_PREFIX + usoId));
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}
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});
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chromeLocal.getValue(CACHE_CLEANUP_NEEDED).then(value =>
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value && debounce(cleanupCache, CACHE_CLEANUP_THROTTLE));
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}
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//endregion
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//region Loader
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/**
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* Sets loading status of search results.
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* @param {Boolean} isLoading If search results are idle (false) or still loading (true).
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*/
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function setLoading(isLoading) {
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if (loading !== isLoading) {
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loading = isLoading;
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// Refresh elements that depend on `loading` state.
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render();
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}
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}
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function showSpinner(parent) {
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parent = parent instanceof Node ? parent : $(parent);
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parent.appendChild($create('.lds-spinner',
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new Array(12).fill($create('div')).map(e => e.cloneNode())));
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}
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/** Increments displayedPage and loads results. */
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function next() {
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if (loading) {
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debounce(next, 100);
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return;
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}
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displayedPage += 1;
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scrollToFirstResult = true;
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render();
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loadMoreIfNeeded();
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}
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/** Decrements currentPage and loads results. */
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function prev() {
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if (loading) {
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debounce(next, 100);
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return;
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}
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displayedPage = Math.max(1, displayedPage - 1);
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scrollToFirstResult = true;
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render();
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}
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/**
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* Display error message to user.
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* @param {string} message Message to display to user.
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*/
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function error(reason) {
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dom.error.textContent = reason === 404 ? t('searchResultNoneFound') : reason;
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dom.error.classList.remove('hidden');
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dom.container.classList.toggle('hidden', !processedResults.length);
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document.body.classList.toggle('search-results-shown', processedResults.length > 0);
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if (dom.error.getBoundingClientRect().bottom < 0) {
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dom.error.scrollIntoView({behavior: 'smooth', block: 'start'});
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}
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}
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/**
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* Initializes search results container, starts fetching results.
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*/
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function load() {
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if (searchExhausted > 1) {
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if (!processedResults.length) {
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error(404);
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}
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return;
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}
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setLoading(true);
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dom.container.classList.remove('hidden');
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dom.error.classList.add('hidden');
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category = category || getCategory();
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search({category})
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.then(function process(results) {
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const data = results.data.filter(sameCategoryNoDupes);
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if (!data.length && searchExhausted <= 1) {
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const old = category;
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const uso = (processedResults[0] || {}).subcategory;
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category = uso !== category && uso || getCategory({retry: true});
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if (category !== old) return search({category, restart: true}).then(process);
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}
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const numIrrelevant = results.data.length - data.length;
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totalResults += results.current_page === 1 ? results.total_entries : 0;
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totalResults = Math.max(0, totalResults - numIrrelevant);
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totalPages = Math.ceil(totalResults / DISPLAY_PER_PAGE);
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setLoading(false);
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if (data.length) {
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unprocessedResults.push(...data);
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processNextResult();
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} else if (numIrrelevant) {
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load();
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} else if (!processedResults.length) {
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return Promise.reject(404);
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}
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})
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.catch(error);
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}
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function loadMoreIfNeeded(event) {
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let pageToPrefetch = displayedPage;
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if (event instanceof Event) {
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if ((loadMoreIfNeeded.prefetchedPage || 0) <= pageToPrefetch &&
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document.scrollingElement.scrollTop > document.scrollingElement.scrollHeight / 2) {
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loadMoreIfNeeded.prefetchedPage = ++pageToPrefetch;
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} else {
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return;
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}
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}
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if (processedResults.length < pageToPrefetch * DISPLAY_PER_PAGE) {
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setTimeout(load, DELAY_BEFORE_SEARCHING_STYLES);
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}
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}
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/**
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* Processes the next search result in `unprocessedResults` and adds to `processedResults`.
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* Skips installed/non-applicable styles.
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* Fetches more search results if unprocessedResults is empty.
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* Recurses until shouldLoadMore() is false.
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*/
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function processNextResult() {
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const result = unprocessedResults.shift();
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if (!result) {
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loadMoreIfNeeded();
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return;
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}
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const md5Url = UPDATE_URL.replace('%', result.id);
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API.styleExists({md5Url}).then(exist => {
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if (exist) {
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totalResults = Math.max(0, totalResults - 1);
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} else {
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processedResults.push(result);
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render();
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}
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setTimeout(processNextResult, !exist && DELAY_AFTER_FETCHING_STYLES);
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});
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}
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//endregion
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//region UI
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function render() {
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let start = (displayedPage - 1) * DISPLAY_PER_PAGE;
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const end = displayedPage * DISPLAY_PER_PAGE;
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let plantAt = 0;
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let slot = dom.list.children[0];
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// keep rendered elements with ids in the range of interest
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while (
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plantAt < DISPLAY_PER_PAGE &&
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slot && slot.id === 'search-result-' + (processedResults[start] || {}).id
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) {
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slot = slot.nextElementSibling;
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plantAt++;
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start++;
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}
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const plantEntry = entry => {
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if (slot) {
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dom.list.replaceChild(entry, slot);
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slot = entry.nextElementSibling;
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} else {
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dom.list.appendChild(entry);
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}
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entry.classList.toggle('search-result-fadein',
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!slot || performance.now() - slot._plantedTime > FADEIN_THRESHOLD);
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return entry;
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};
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while (start < Math.min(end, processedResults.length)) {
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plantEntry(createSearchResultNode(processedResults[start++]));
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plantAt++;
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}
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for (const place in dom.nav) {
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const nav = dom.nav[place];
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nav._prev.disabled = displayedPage <= 1;
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nav._next.disabled = displayedPage >= totalPages;
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nav._page.textContent = displayedPage;
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nav._total.textContent = totalPages;
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}
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// Fill in remaining search results with blank results + spinners
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const maxResults = end > totalResults &&
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totalResults % DISPLAY_PER_PAGE ||
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DISPLAY_PER_PAGE;
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while (plantAt < maxResults) {
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if (!slot || slot.id.startsWith(RESULT_ID_PREFIX)) {
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const entry = plantEntry(template.emptySearchResult.cloneNode(true));
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entry._plantedTime = performance.now();
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showSpinner(entry);
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}
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plantAt++;
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if (!processedResults.length) {
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break;
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}
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}
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while (dom.list.children.length > maxResults) {
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dom.list.lastElementChild.remove();
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}
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if (processedResults.length && 'empty' in dom.container.dataset) {
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delete dom.container.dataset.empty;
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}
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if (scrollToFirstResult && (!FIREFOX || FIREFOX >= 55)) {
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debounce(doScrollToFirstResult);
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}
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}
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function doScrollToFirstResult() {
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if (dom.container.scrollHeight > window.innerHeight * 2) {
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scrollToFirstResult = false;
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dom.container.scrollIntoView({behavior: 'smooth', block: 'start'});
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}
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}
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/**
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* Constructs and adds the given search result to the popup's Search Results container.
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* @param {Object} result The SearchResult object from userstyles.org
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*/
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function createSearchResultNode(result) {
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/*
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userstyleSearchResult format: {
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id: 100835,
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name: "Reddit Flat Dark",
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screenshot_url: "19339_after.png",
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description: "...",
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user: {
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id: 48470,
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name: "holloh"
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},
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style_settings: [...]
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}
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*/
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const entry = template.searchResult.cloneNode(true);
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Object.assign(entry, {
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_result: result,
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id: RESULT_ID_PREFIX + result.id,
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});
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Object.assign($('.search-result-title', entry), {
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onclick: handleEvent.openURLandHide,
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href: BASE_URL + result.url
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});
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const displayedName = result.name.length < 300 ? result.name : result.name.slice(0, 300) + '...';
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$('.search-result-title span', entry).textContent = tWordBreak(displayedName);
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const screenshot = $('.search-result-screenshot', entry);
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let url = result.screenshot_url;
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if (!url) {
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url = BLANK_PIXEL_DATA;
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screenshot.classList.add('no-screenshot');
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} else if (/^[0-9]*_after.(jpe?g|png|gif)$/i.test(url)) {
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url = BASE_URL + '/style_screenshot_thumbnails/' + url;
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}
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screenshot.src = url;
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if (url !== BLANK_PIXEL_DATA) {
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screenshot.classList.add('search-result-fadein');
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screenshot.onload = () => {
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screenshot.classList.remove('search-result-fadein');
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};
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}
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const description = result.description
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.replace(/<[^>]*>/g, ' ')
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.replace(/([^.][.。?!]|[\s,].{50,70})\s+/g, '$1\n')
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.replace(/([\r\n]\s*){3,}/g, '\n\n');
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Object.assign($('.search-result-description', entry), {
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textContent: description,
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title: description,
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});
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Object.assign($('[data-type="author"] a', entry), {
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textContent: result.user.name,
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title: result.user.name,
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href: BASE_URL + '/users/' + result.user.id,
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onclick: handleEvent.openURLandHide,
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});
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let ratingClass;
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let ratingValue = result.rating;
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if (ratingValue === null) {
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ratingClass = 'none';
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ratingValue = '';
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} else if (ratingValue >= 2.5) {
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ratingClass = 'good';
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ratingValue = ratingValue.toFixed(1);
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} else if (ratingValue >= 1.5) {
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ratingClass = 'okay';
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ratingValue = ratingValue.toFixed(1);
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} else {
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ratingClass = 'bad';
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ratingValue = ratingValue.toFixed(1);
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}
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$('[data-type="rating"]', entry).dataset.class = ratingClass;
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$('[data-type="rating"] dd', entry).textContent = ratingValue;
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Object.assign($('[data-type="updated"] time', entry), {
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dateTime: result.updated,
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textContent: formatDate(result.updated)
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});
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$('[data-type="weekly"] dd', entry).textContent = formatNumber(result.weekly_install_count);
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$('[data-type="total"] dd', entry).textContent = formatNumber(result.total_install_count);
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renderActionButtons(entry);
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return entry;
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}
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function formatNumber(num) {
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return (
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num > 1e9 ? (num / 1e9).toFixed(1) + 'B' :
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num > 10e6 ? (num / 1e6).toFixed(0) + 'M' :
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num > 1e6 ? (num / 1e6).toFixed(1) + 'M' :
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num > 10e3 ? (num / 1e3).toFixed(0) + 'k' :
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num > 1e3 ? (num / 1e3).toFixed(1) + 'k' :
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num
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);
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}
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function renderActionButtons(entry) {
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if (!entry) {
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return;
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}
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const result = entry._result;
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if (result.installed && !('installed' in entry.dataset)) {
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entry.dataset.installed = '';
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$('.search-result-status', entry).textContent = t('clickToUninstall');
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} else if (!result.installed && 'installed' in entry.dataset) {
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delete entry.dataset.installed;
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$('.search-result-status', entry).textContent = '';
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}
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const screenshot = $('.search-result-screenshot', entry);
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screenshot.onclick = result.installed ? onUninstallClicked : onInstallClicked;
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screenshot.title = result.installed ? '' : t('installButton');
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const uninstallButton = $('.search-result-uninstall', entry);
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uninstallButton.onclick = onUninstallClicked;
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const installButton = $('.search-result-install', entry);
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installButton.onclick = onInstallClicked;
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if ((result.style_settings || []).length > 0) {
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// Style has customizations
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installButton.classList.add('customize');
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uninstallButton.classList.add('customize');
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const customizeButton = $('.search-result-customize', entry);
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customizeButton.dataset.href = BASE_URL + result.url;
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customizeButton.dataset.sendMessage = JSON.stringify({method: 'openSettings'});
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customizeButton.classList.remove('hidden');
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customizeButton.onclick = function (event) {
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event.stopPropagation();
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handleEvent.openURLandHide.call(this, event);
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};
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|
}
|
|
}
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|
|
function onUninstallClicked(event) {
|
|
event.stopPropagation();
|
|
const entry = this.closest('.search-result');
|
|
saveScrollPosition(entry);
|
|
API.deleteStyle(entry._result.installedStyleId)
|
|
.then(restoreScrollPosition);
|
|
}
|
|
|
|
/** Installs the current userstyleSearchResult into Stylus. */
|
|
function onInstallClicked(event) {
|
|
event.stopPropagation();
|
|
|
|
const entry = this.closest('.search-result');
|
|
const result = entry._result;
|
|
const installButton = $('.search-result-install', entry);
|
|
|
|
showSpinner(entry);
|
|
saveScrollPosition(entry);
|
|
installButton.disabled = true;
|
|
entry.style.setProperty('pointer-events', 'none', 'important');
|
|
|
|
// Fetch settings to see if we should display "configure" button
|
|
Promise.all([
|
|
fetchStyleJson(result),
|
|
fetchStyleSettings(result),
|
|
API.download({url: UPDATE_URL.replace('%', result.id)})
|
|
])
|
|
.then(([style, settings, md5]) => {
|
|
pingback(result);
|
|
// show a 'config-on-homepage' icon in the popup
|
|
style.updateUrl += settings.length ? '?' : '';
|
|
style.originalMd5 = md5;
|
|
return API.installStyle(style);
|
|
})
|
|
.catch(reason => {
|
|
const usoId = result.id;
|
|
console.debug('install:saveStyle(usoID:', usoId, ') => [ERROR]: ', reason);
|
|
error('Error while downloading usoID:' + usoId + '\nReason: ' + reason);
|
|
})
|
|
.then(() => {
|
|
$.remove('.lds-spinner', entry);
|
|
installButton.disabled = false;
|
|
entry.style.pointerEvents = '';
|
|
restoreScrollPosition();
|
|
});
|
|
|
|
function fetchStyleSettings(result) {
|
|
return result.style_settings ||
|
|
fetchStyle(result.id).then(style => {
|
|
result.style_settings = style.style_settings || [];
|
|
return result.style_settings;
|
|
});
|
|
}
|
|
}
|
|
|
|
function pingback(result) {
|
|
const wnd = window;
|
|
// FIXME: move this to background page and create an API like installUSOStyle
|
|
result.pingbackTimer = wnd.setTimeout(wnd.download, PINGBACK_DELAY,
|
|
BASE_URL + '/styles/install/' + result.id + '?source=stylish-ch');
|
|
}
|
|
|
|
function saveScrollPosition(entry) {
|
|
dom.scrollPosition = entry.getBoundingClientRect().top;
|
|
dom.scrollPositionElement = entry;
|
|
}
|
|
|
|
function restoreScrollPosition() {
|
|
const t0 = performance.now();
|
|
new MutationObserver((mutations, observer) => {
|
|
if (performance.now() - t0 < 1000) {
|
|
window.scrollBy(0, dom.scrollPositionElement.getBoundingClientRect().top - dom.scrollPosition);
|
|
}
|
|
observer.disconnect();
|
|
}).observe(document.body, {childList: true, subtree: true, attributes: true});
|
|
}
|
|
|
|
//endregion
|
|
//region USO API wrapper
|
|
|
|
/**
|
|
* Resolves the Userstyles.org "category" for a given URL.
|
|
*/
|
|
function getCategory({retry} = {}) {
|
|
const u = tryCatch(() => new URL(tabURL));
|
|
if (!u) {
|
|
// Invalid URL
|
|
return '';
|
|
} else if (u.protocol === 'file:') {
|
|
return 'file:';
|
|
} else if (u.protocol === location.protocol) {
|
|
return STYLUS_CATEGORY;
|
|
} else {
|
|
const parts = u.hostname.replace(/\.(?:com?|org)(\.\w{2,3})$/, '$1').split('.');
|
|
const [tld, main = u.hostname, third, fourth] = parts.reverse();
|
|
const keepTld = !retry && !(
|
|
tld === 'com' ||
|
|
tld === 'org' && main !== 'userstyles'
|
|
);
|
|
const keepThird = !retry && (
|
|
fourth ||
|
|
third && third !== 'www' && third !== 'm'
|
|
);
|
|
return (keepThird && `${third}.` || '') + main + (keepTld ? `.${tld}` : '');
|
|
}
|
|
}
|
|
|
|
function sameCategoryNoDupes(result) {
|
|
return (
|
|
result.subcategory &&
|
|
!processedResults.some(pr => pr.id === result.id) &&
|
|
(category !== STYLUS_CATEGORY || /\bStylus\b/i.test(result.name + result.description)) &&
|
|
category.split('.')[0] === result.subcategory.split('.')[0]
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Fetches the JSON style object from userstyles.org (containing code, sections, updateUrl, etc).
|
|
* Stores (caches) the JSON within the given result, to avoid unnecessary network usage.
|
|
* Style JSON is fetched from the /styles/chrome/{id}.json endpoint.
|
|
* @param {Object} result A search result object from userstyles.org
|
|
* @returns {Promise<Object>} Promises the response as a JSON object.
|
|
*/
|
|
function fetchStyleJson(result) {
|
|
return Promise.resolve(
|
|
result.json ||
|
|
downloadFromUSO(JSON_URL + result.id + '.json').then(json => {
|
|
result.json = json;
|
|
return json;
|
|
}));
|
|
}
|
|
|
|
/**
|
|
* Fetches style information from userstyles.org's /api/v1/styles/{ID} API.
|
|
* @param {number} userstylesId The internal "ID" for a style on userstyles.org
|
|
* @returns {Promise<Object>} An object containing info about the style, e.g. name, author, etc.
|
|
*/
|
|
function fetchStyle(userstylesId) {
|
|
return readCache(userstylesId).then(json =>
|
|
json ||
|
|
downloadFromUSO(API_URL + userstylesId).then(writeCache));
|
|
}
|
|
|
|
/**
|
|
* Fetches (and JSON-parses) search results from a userstyles.org search API.
|
|
* Automatically sets searchCurrentPage and searchTotalPages.
|
|
* @param {string} category The usrestyles.org "category" (subcategory) OR a any search string.
|
|
* @return {Object} Response object from userstyles.org
|
|
*/
|
|
function search({category, restart}) {
|
|
if (restart) {
|
|
searchCurrentPage = 1;
|
|
searchTotalPages = undefined;
|
|
}
|
|
if (searchTotalPages !== undefined && searchCurrentPage > searchTotalPages) {
|
|
return Promise.resolve({'data':[]});
|
|
}
|
|
|
|
const searchURL = API_URL + 'subcategory' +
|
|
'?search=' + encodeURIComponent(category) +
|
|
'&page=' + searchCurrentPage +
|
|
'&per_page=10' +
|
|
'&country=NA';
|
|
|
|
const cacheKey = category + '/' + searchCurrentPage;
|
|
|
|
return readCache(cacheKey)
|
|
.then(json =>
|
|
json ||
|
|
downloadFromUSO(searchURL).then(writeCache))
|
|
.then(json => {
|
|
searchCurrentPage = json.current_page + 1;
|
|
searchTotalPages = json.total_pages;
|
|
searchExhausted += searchCurrentPage > searchTotalPages;
|
|
return json;
|
|
}).catch(reason => {
|
|
searchExhausted++;
|
|
return Promise.reject(reason);
|
|
});
|
|
}
|
|
|
|
//endregion
|
|
//region Cache
|
|
|
|
function readCache(id) {
|
|
const key = CACHE_PREFIX + id;
|
|
return chromeLocal.getValue(key).then(item => {
|
|
if (!cacheItemExpired(item)) {
|
|
return chromeLocal.loadLZStringScript().then(() =>
|
|
tryJSONparse(LZString.decompressFromUTF16(item.payload)));
|
|
} else if (item) {
|
|
chrome.storage.local.remove(key);
|
|
}
|
|
});
|
|
}
|
|
|
|
function writeCache(data, debounced) {
|
|
data.id = data.id || category + '/' + data.current_page;
|
|
for (const prop of CACHE_EXCEPT_PROPS) {
|
|
delete data[prop];
|
|
}
|
|
if (!debounced) {
|
|
// using plain setTimeout because debounce() replaces previous parameters
|
|
setTimeout(writeCache, 100, data, true);
|
|
return data;
|
|
} else {
|
|
chromeLocal.setValue(CACHE_CLEANUP_NEEDED, true);
|
|
debounce(cleanupCache, CACHE_CLEANUP_THROTTLE);
|
|
return chromeLocal.loadLZStringScript().then(() =>
|
|
chromeLocal.setValue(CACHE_PREFIX + data.id, {
|
|
payload: LZString.compressToUTF16(JSON.stringify(data)),
|
|
date: Date.now(),
|
|
})).then(() => data);
|
|
}
|
|
}
|
|
|
|
function cacheItemExpired(item) {
|
|
return !item || !item.date || Date.now() - item.date > CACHE_DURATION;
|
|
}
|
|
|
|
function cleanupCache() {
|
|
chromeLocal.remove(CACHE_CLEANUP_NEEDED);
|
|
if (chrome.storage.local.getBytesInUse) {
|
|
chrome.storage.local.getBytesInUse(null, size => {
|
|
if (size > CACHE_SIZE) {
|
|
chrome.storage.local.get(null, cleanupCacheInternal);
|
|
}
|
|
ignoreChromeError();
|
|
});
|
|
} else {
|
|
chrome.storage.local.get(null, cleanupCacheInternal);
|
|
}
|
|
}
|
|
|
|
function cleanupCacheInternal(storage) {
|
|
const sortedByTime = Object.keys(storage)
|
|
.filter(key => key.startsWith(CACHE_PREFIX))
|
|
.map(key => Object.assign(storage[key], {key}))
|
|
.sort((a, b) => a.date - b.date);
|
|
const someExpired = cacheItemExpired(sortedByTime[0]);
|
|
const expired = someExpired ? sortedByTime.filter(cacheItemExpired) :
|
|
sortedByTime.slice(0, sortedByTime.length / 2);
|
|
const toRemove = expired.length ? expired : sortedByTime;
|
|
if (toRemove.length) {
|
|
chrome.storage.local.remove(toRemove.map(item => item.key), ignoreChromeError);
|
|
}
|
|
ignoreChromeError();
|
|
}
|
|
|
|
//endregion
|
|
//region USO referrer spoofing
|
|
|
|
function downloadFromUSO(url) {
|
|
const requestId = getRandomId();
|
|
xhrSpoofIds.add(requestId);
|
|
xhrSpoofStart();
|
|
return download(url, {
|
|
body: null,
|
|
responseType: 'json',
|
|
headers: {
|
|
'Referrer-Policy': 'origin-when-cross-origin',
|
|
[xhrSpoofTelltale]: requestId,
|
|
}
|
|
}).then(data => {
|
|
xhrSpoofDone(requestId);
|
|
return data;
|
|
}).catch(data => {
|
|
xhrSpoofDone(requestId);
|
|
return Promise.reject(data);
|
|
});
|
|
}
|
|
|
|
function xhrSpoofStart() {
|
|
if (chrome.webRequest.onBeforeSendHeaders.hasListener(xhrSpoof)) {
|
|
return;
|
|
}
|
|
const urls = [API_URL + '*', JSON_URL + '*'];
|
|
const types = ['xmlhttprequest'];
|
|
const options = ['blocking', 'requestHeaders'];
|
|
// spoofing Referer requires extraHeaders in Chrome 72+
|
|
if (chrome.webRequest.OnBeforeSendHeadersOptions.EXTRA_HEADERS) {
|
|
options.push(chrome.webRequest.OnBeforeSendHeadersOptions.EXTRA_HEADERS);
|
|
}
|
|
chrome.webRequest.onBeforeSendHeaders.addListener(xhrSpoof, {urls, types}, options);
|
|
}
|
|
|
|
function xhrSpoofDone(requestId) {
|
|
xhrSpoofIds.delete(requestId);
|
|
if (!xhrSpoofIds.size) {
|
|
chrome.webRequest.onBeforeSendHeaders.removeListener(xhrSpoof);
|
|
}
|
|
}
|
|
|
|
function xhrSpoof({requestHeaders}) {
|
|
let referer, hasTelltale;
|
|
for (let i = requestHeaders.length; --i >= 0;) {
|
|
const header = requestHeaders[i];
|
|
if (header.name.toLowerCase() === 'referer') {
|
|
referer = header;
|
|
} else if (header.name === xhrSpoofTelltale) {
|
|
hasTelltale = xhrSpoofIds.has(header.value);
|
|
requestHeaders.splice(i, 1);
|
|
}
|
|
}
|
|
if (!hasTelltale) {
|
|
// not our request (unlikely but just in case)
|
|
return;
|
|
}
|
|
if (referer) {
|
|
referer.value = BASE_URL;
|
|
} else {
|
|
requestHeaders.push({name: 'Referer', value: BASE_URL});
|
|
}
|
|
return {requestHeaders};
|
|
}
|
|
|
|
function getRandomId() {
|
|
return btoa(Math.random()).replace(/[^a-z]/gi, '');
|
|
}
|
|
|
|
//endregion
|
|
});
|