feat: debug logging and better timestamps

src/lib/logger.mjs

@@ -1,5 +1,23 @@
 /* eslint no-console: 0 */
-const wrapMessage = msg => `${new Date()}: ${msg.join(' ')}`;
+const zeroPad = (str, len) => {
+  let output = `${str}`;
+  if (!len || len <= output.length) return str;
+
+  while (output.length < len) {
+    output = `0${output}`;
+  }
+  return output;
+};
+
+const wrapMessage = msg => {
+  const d = new Date();
+  const timestamp = `${[d.getFullYear(), zeroPad(d.getMonth(), 2), zeroPad(d.getDate(), 2)].join(
+    '/'
+  )} ${[zeroPad(d.getHours(), 2), zeroPad(d.getMinutes(), 2), zeroPad(d.getSeconds(), 2)].join(
+    ':'
+  )}`;
+  return `[${timestamp}]: ${msg.join(' ')}`;
+};
 
 const logger = {
   log(...args) {
@@ -11,6 +29,10 @@ const logger = {
   error(...args) {
     console.error(wrapMessage(args));
   },
+  debug(...args) {
+    if (!process.env.DEBUG) return;
+    console.log(wrapMessage(args));
+  },
 };
 
 export default logger;