whiskr/static/js/lib.js

/** biome-ignore-all lint/correctness/noUnusedVariables: utility */

function storeValue(key, value = false) {
	if (value === null || value === undefined || value === false) {
		localStorage.removeItem(key);

		return;
	}

	localStorage.setItem(key, JSON.stringify(value));
}

function loadValue(key, fallback = false) {
	const raw = localStorage.getItem(key);

	if (raw === null) {
		return fallback;
	}

	try {
		const value = JSON.parse(raw);

		if (value === null) {
			throw new Error("no value");
		}

		return value;
	} catch {}

	return fallback;
}

function schedule(cb) {
	if (document.visibilityState === "visible") {
		requestAnimationFrame(cb);

		return;
	}

	setTimeout(cb, 80);
}

function uid() {
	return `${Date.now().toString(36)}-${Math.random().toString(36).slice(2, 8)}`;
}

function make(tag, ...classes) {
	const el = document.createElement(tag);

	if (classes.length) {
		el.classList.add(...classes);
	}

	return el;
}

function escapeHtml(text) {
	return text
		.replace(/&/g, "&")
		.replace(/</g, "&lt;")
		.replace(/>/g, "&gt;");
}

function formatMilliseconds(ms) {
	if (ms < 1000) {
		return `${ms}ms`;
	} else if (ms < 10000) {
		return `${(ms / 1000).toFixed(1)}s`;
	}

	return `${Math.round(ms / 1000)}s`;
}

function fixed(num, decimals = 0) {
	return num.toFixed(decimals).replace(/\.?0+$/m, "");
}

function download(name, type, data) {
	let blob;

	if (data instanceof Blob) {
		blob = data;
	} else {
		blob = new Blob([data], {
			type: type,
		});
	}

	const a = document.createElement("a"),
		url = URL.createObjectURL(blob);

	a.setAttribute("download", name);
	a.style.display = "none";
	a.href = url;

	document.body.appendChild(a);

	a.click();

	document.body.removeChild(a);
	URL.revokeObjectURL(url);
}

function selectFile(accept) {
	return new Promise((resolve) => {
		const input = make("input");

		input.type = "file";
		input.accept = accept;

		input.onchange = () => {
			const file = input.files[0];

			if (!file) {
				resolve(false);

				return;
			}

			const reader = new FileReader();

			reader.onload = () => {
				try {
					const data = JSON.parse(reader.result);

					resolve(data);
				} catch {
					resolve(false);
				}
			};

			reader.onerror = () => resolve(false);

			reader.readAsText(file);
		};

		input.click();
	});
}