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 };

backend/src/services/WbotServices/wbotMessageListener.ts

@@ -20,6 +20,7 @@ import { logger } from "../../utils/logger";
 import CreateOrUpdateContactService from "../ContactServices/CreateOrUpdateContactService";
 import FindOrCreateTicketService from "../TicketServices/FindOrCreateTicketService";
 import ShowWhatsAppService from "../WhatsappService/ShowWhatsAppService";
+import { debounce } from "../../helpers/Debounce";
 
 interface Session extends Client {
   id?: number;
@@ -165,9 +166,19 @@ const verifyQueue = async (
 
     const body = `\u200e ${greetingMessage}\n${options}`;
 
-    const sentMessage = await wbot.sendMessage(`${contact.number}@c.us`, body);
+    const debouncedSentMessage = debounce(
+      async () => {
+        const sentMessage = await wbot.sendMessage(
+          `${contact.number}@c.us`,
+          body
+        );
+        verifyMessage(sentMessage, ticket, contact);
+      },
+      3000,
+      ticket.id
+    );
 
-    await verifyMessage(sentMessage, ticket, contact);
+    debouncedSentMessage();
   }
 };