utils.mjs

export async function fetchText(url) {
    const res = await fetch(url);
    const content = await res.text();
    return content;
}

export async function fetchJson(url) {
    const res = await fetch(url);
    const content = await res.json();
    return content;
}

export function waitForClick() {
    return new Promise((resolve) => {
        document.addEventListener('click', resolve, { once: true });
    });
}

export function sleepSecs(dt) {
    return new Promise((resolve) => {
        setTimeout(resolve, dt * 1000);
    });
}

function removeIfAbove(maxAmount) {
    const codeEls = Array.from(document.querySelectorAll('code'));
    if (codeEls.length >= maxAmount) {
        document.body.removeChild(codeEls[0]);
    }
}

export function printAscii(data, classes = []) {
    removeIfAbove(22);
    const el = document.createElement('code');
    ['ascii', ...classes].forEach((cn) => el.classList.add(cn));
    el.appendChild(document.createTextNode(data));
    document.body.appendChild(el);
}

export function download(filename, text, type = 'text/plain') {
    const element = document.createElement('a');
    const file = new Blob([text], { type });
    element.href = URL.createObjectURL(file);
    element.download = filename;
    element.style.display = 'none';
    document.body.appendChild(element);
    element.click();
    document.body.removeChild(element);
}

export function downloadBinary(filename, uint8Array, type = 'application/octet-stream') {
    const element = document.createElement('a');
    const file = new Blob([uint8Array], { type });
    element.href = URL.createObjectURL(file);
    element.download = filename;
    element.style.display = 'none';
    document.body.appendChild(element);
    element.click();
    document.body.removeChild(element);
}

export function percent(r, decimals=0) {
    return (r * 100).toFixed(decimals) + '%';
}