telegram export

telegram-export.js

var setTimeout;
(function (setTimeout) {
    function async(delay) {
        return new Promise((resolve) => setTimeout(resolve, delay));
    }
    setTimeout.async = async;
})(setTimeout || (setTimeout = {}));
async function getMessageDateGroupHtml($messageDateGroup) {
    let lastLoadedMessageId = "";
    do {
        const lastMessage = $messageDateGroup.querySelector(`div.message-list-item:last-child`);
        if (!lastMessage) {
            return $messageDateGroup.outerHTML;
        }
        const lastMessageId = lastMessage.getAttribute(`data-message-id`) || "";
        if (lastMessageId === lastLoadedMessageId) {
            return $messageDateGroup.outerHTML;
        }
        lastLoadedMessageId = lastMessageId;
        lastMessage.scrollIntoView();
        await setTimeout.async(3000);
    } while (!window.break);
    return "";
}
function getHead() {
    return [
        "https://web.telegram.org/a/main.b833bcf83ed335f108ad.css",
        "https://web.telegram.org/a/5980.b98189b7c15090a3bbcd.css",
        "https://web.telegram.org/a/BundleMain.30f44ba659f3100b6f72.css",
    ]
        .map((url) => `<link rel="stylesheet" type="text/css" href="${url}">`)
        .concat(`<style>
            body {
                overflow: auto;
            }
            .message-list-item a {
                color: blue !important;
            }
            .message-content { 
                height: max-content; 
            }
        </style>`)
        .join(``);
}
async function generateExport(messageDateGroupHtmls) {
    const tab = window.open(``, `_blank`);
    await setTimeout.async(2000);
    if (!tab) {
        throw new Error("Failed to open new tab");
    }
    tab.document.body.innerHTML = messageDateGroupHtmls.join(``);
    tab.document.head.innerHTML = getHead();
    tab.document.title = `Telegram Export ${new Date().toISOString()}`;
    tab.document.body.querySelectorAll(`.Spoiler--concealed`).forEach((el) => {
        el.classList.remove(`Spoiler--concealed`);
        el.classList.remove(`Spoiler--animated`);
    });
}
async function* paginateMessageDateGroups() {
    const processedDates = new Set();
    do {
        const messageDateGroups = Array.from(document.querySelectorAll(`div.message-date-group`));
        const preProcessingCount = processedDates.size;
        for (const messageDateGroup of messageDateGroups) {
            const date = messageDateGroup.querySelector(`.sticky-date`)?.textContent?.trim() ||
                "";
            if (processedDates.has(date)) {
                continue;
            }
            console.log(`yielding ${date}`);
            yield messageDateGroup;
            processedDates.add(date);
        }
        if (preProcessingCount === processedDates.size) {
            return;
        }
        await setTimeout.async(3000);
    } while (!window.break && processedDates.size < 10);
}
async function execute() {
    console.log(`execute`);
    const messageDateGroupHtmls = [];
    for await (const messageDateGroup of paginateMessageDateGroups()) {
        const messageDateGroupHtml = await getMessageDateGroupHtml(messageDateGroup);
        messageDateGroupHtmls.push(messageDateGroupHtml);
    }
    await generateExport(messageDateGroupHtmls);
}
execute();