nekrochan/static/js/autofill.js

$(function () {
    let name = get_cookie("name");
    let password = get_cookie("password");

    if (password === "") {
        password = generate_password();
        set_cookie("password", password);
    }

    $('input[name="post_name"]').attr("value", name);
    $('input[name="post_password"]').attr("value", password);
});

function generate_password() {
    let chars =
        "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
    let password_length = 8;
    let password = "";

    for (let i = 0; i <= password_length; i++) {
        let random_number = Math.floor(Math.random() * chars.length);
        password += chars.substring(random_number, random_number + 1);
    }

    return password;
}

function get_cookie(cname) {
    let name = cname + "=";
    let decodedCookie = decodeURIComponent(document.cookie);
    let ca = decodedCookie.split(";");

    for (let i = 0; i < ca.length; i++) {
        let c = ca[i];

        while (c.charAt(0) == " ") {
            c = c.substring(1);
        }

        if (c.indexOf(name) == 0) {
            return c.substring(name.length, c.length);
        }
    }

    return "";
}

function set_cookie(cname, cvalue) {
    document.cookie = `${cname}=${cvalue};path=/`;
}