let updateInterval;

document.addEventListener("DOMContentLoaded", () => {
    const table = document.getElementById("download_contents").getElementsByTagName("tbody")[0];
    if (table.children.length === 0) { return; }

    updateInterval = setInterval(() => {
        fetch(`info?code=${CODE}`)
            .then((res) => res.json())
            .then((info) => {
                for (const [index, offset] of info.offsets.entries()) {
                    table.children[index].className = (offset > info.available) ? "unavailable" : "";
                }
                if (info.available === info.file.size) {
                    clearInterval(updateInterval);
                }
            });
    }, 5000);
});