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background.js
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background.js
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const sleep = (ms) => new Promise((r) => setTimeout(r, ms));
let downloadedIds = new Set();
async function setToStorage(id, value) {
let obj = {};
obj[id] = value;
return browser.storage.local.set(obj);
}
async function getFromStorage(type, id, fallback) {
let tmp = await browser.storage.local.get(id);
return typeof tmp[id] === type ? tmp[id] : fallback;
}
async function getImagePageURLsFromGalleryPage(url) {
//console.debug("pageurl", url);
const res = await fetch(url);
const html = await res.text();
let parser = new DOMParser();
let doc = parser.parseFromString(html, "text/html");
let img = await doc.querySelector("#img");
const ret = Array.from(
doc.querySelectorAll('a[href^="https://e-hentai.org/s/"')
).map((el) => {
return el.getAttribute("href");
});
//console.debug(url, ret);
return ret;
}
browser.browserAction.onClicked.addListener(async (tab) => {
browser.browserAction.disable(tab.od);
const zip = new JSZip();
let counter = 1;
let tmp = await browser.tabs.executeScript({
code: `
Array.from(document.querySelectorAll('table.ptt a[href]')).filter( (e) => {return !isNaN(parseInt(e.innerText)) }).slice(-1)[0].innerText;
`,
});
//console.debug(tmp[0]);
const max_page_nb = parseInt(tmp[0]);
let url = new URL(tab.url);
url.hash = "";
url.search = "";
await browser.browserAction.disable(tab.id);
let parser = new DOMParser();
for (let i = 0; i < max_page_nb; i++) {
let page_url = url.toString() + "?p=" + i;
//console.debug('page_url', page_url);
let urls = await getImagePageURLsFromGalleryPage(page_url);
//console.debug(JSON.stringify(urls,null,4));
for (const url of urls) {
const resp = await fetch(url);
const html = await resp.text();
let doc = await parser.parseFromString(html, "text/html");
let img = await doc.querySelector("#img");
let src = img.src;
console.debug(counter, src);
const fetch_ret = await fetch(img.src);
const ext = img.src.split(".").slice(-1);
zip.file(counter + "." + ext, fetch_ret.arrayBuffer(), {
binary: "uint8Array",
});
counter++;
browser.browserAction.setBadgeText({
text: "" + Math.floor((counter / (max_page_nb * 40) / 2) * 100),
tabId: tab.id,
});
await sleep(1000);
}
}
let blob = await zip.generateAsync({ type: "blob" }, (meta) => {
browser.browserAction.setBadgeText({
text: "" + Math.floor(50 + meta.percent / 2),
tabId: tab.id,
});
});
await browser.browserAction.setBadgeText({
text: "✅",
tabId: tab.id,
});
tmp = tab.url.split("https://e-hentai.org/g/")[1].split("/")[0];
if (!downloadedIds.has(tmp)) {
downloadedIds.add(tmp);
setToStorage("downloadedIds", downloadedIds);
}
saveAs(blob, tab.title + ".cbz");
browser.browserAction.enable(tab.id);
});
const filter = {
properties: ["url"],
};
function handleUpdated(tabId, changeInfo, tabInfo) {
if (
typeof changeInfo.url === "string" &&
changeInfo.url.startsWith("https://e-hentai.org/g/")
) {
browser.browserAction.enable(tabId);
const tmp = changeInfo.url
.split("https://e-hentai.org/g/")[1]
.split("/")[0];
if (downloadedIds.has(tmp)) {
browser.browserAction.setBadgeText({
text: "✅",
tabId,
});
}
} else {
browser.browserAction.setBadgeText({ text: "", tabId });
browser.browserAction.disable(tabId);
}
}
(async () => {
downloadedIds = await getFromStorage("object", "downloadedIds", new Set());
browser.tabs.onUpdated.addListener(handleUpdated, filter);
browser.browserAction.disable();
browser.browserAction.setBadgeBackgroundColor({ color: "white" });
browser.menus.create({
title: "Clear Downloaded History Markers",
contexts: ["browser_action"],
onclick: async (tab, info) => {
downloadedIds.clear();
setToStorage("downloadedIds", downloadedIds);
Array.from(await browser.tabs.query({})).forEach((t) => {
if (
typeof t.url === "string" &&
t.url.startsWith("https://e-hentai.org/g/")
) {
browser.browserAction.setBadgeText({
text: "",
tabId: t.id,
});
}
});
},
});
})();