feat: added debounce delay to auto reply

reply only last message received within 3 seconds

backend/src/helpers/Debounce.ts

@@ -0,0 +1,41 @@
+interface Timeout {
+  id: number;
+  timeout: NodeJS.Timeout;
+}
+
+const timeouts: Timeout[] = [];
+
+const findAndClearTimeout = (ticketId: number) => {
+  if (timeouts.length > 0) {
+    const timeoutIndex = timeouts.findIndex(timeout => timeout.id === ticketId);
+
+    if (timeoutIndex !== -1) {
+      clearTimeout(timeouts[timeoutIndex].timeout);
+      timeouts.splice(timeoutIndex, 1);
+    }
+  }
+};
+
+const debounce = (
+  func: { (): Promise<void>; (...args: never[]): void },
+  wait: number,
+  ticketId: number
+) => {
+  return function executedFunction(...args: never[]): void {
+    const later = () => {
+      findAndClearTimeout(ticketId);
+      func(...args);
+    };
+
+    findAndClearTimeout(ticketId);
+
+    const newTimeout = {
+      id: ticketId,
+      timeout: setTimeout(later, wait)
+    };
+
+    timeouts.push(newTimeout);
+  };
+};
+
+export { debounce };