Implement Discord CnC Server into Emmelia

libUtils.js

@@ -1,7 +1,59 @@
+const { DebugBuilder } = require("./utilities/debugBuilder");
+const log = new DebugBuilder("server", "libUtils");
+
 /**
  * sleep - sleep/wait
  * @constructor
  */
 exports.sleep = (ms) => new Promise((resolve) => {
     setTimeout(resolve, ms);
-  })
+  })
+
+/**
+ * Normalize a port into a number, string, or false.
+ * 
+ * @param {*} val Value to be normalized
+ * @returns Normalized value
+ */
+exports.normalizePort = (val) => {
+  var port = parseInt(val, 10);
+
+  if (isNaN(port)) {
+    // named pipe
+    return val;
+  }
+
+  if (port >= 0) {
+    // port number
+    return port;
+  }
+
+  return false;
+}
+
+/**
+ * Event listener for HTTP server "error" event.
+ */
+exports.onError = (error) => {
+  if (error.syscall !== 'listen') {
+    throw error;
+  }
+
+  var bind = typeof port === 'string'
+    ? 'Pipe ' + port
+    : 'Port ' + port;
+
+  // handle specific listen errors with friendly messages
+  switch (error.code) {
+    case 'EACCES':
+      log.ERROR(bind + ' requires elevated privileges');
+      process.exit(1);
+      break;
+    case 'EADDRINUSE':
+      log.ERROR(bind + ' is already in use');
+      process.exit(1);
+      break;
+    default:
+      throw error;
+  }
+}