Initial commit

backend/src/helpers/GetWbotMessage.ts

@@ -0,0 +1,44 @@
+import { Message as WbotMessage } from "whatsapp-web.js";
+import Ticket from "../models/Ticket";
+import GetTicketWbot from "./GetTicketWbot";
+import AppError from "../errors/AppError";
+
+export const GetWbotMessage = async (
+  ticket: Ticket,
+  messageId: string
+): Promise<WbotMessage> => {
+  const wbot = await GetTicketWbot(ticket);
+
+  const wbotChat = await wbot.getChatById(
+    `${ticket.contact.number}@${ticket.isGroup ? "g" : "c"}.us`
+  );
+
+  let limit = 20;
+
+  const fetchWbotMessagesGradually = async (): Promise<void | WbotMessage> => {
+    const chatMessages = await wbotChat.fetchMessages({ limit });
+
+    const msgFound = chatMessages.find(msg => msg.id.id === messageId);
+
+    if (!msgFound && limit < 100) {
+      limit += 20;
+      return fetchWbotMessagesGradually();
+    }
+
+    return msgFound;
+  };
+
+  try {
+    const msgFound = await fetchWbotMessagesGradually();
+
+    if (!msgFound) {
+      throw new Error("Cannot found message within 100 last messages");
+    }
+
+    return msgFound;
+  } catch (err) {
+    throw new AppError("ERR_FETCH_WAPP_MSG");
+  }
+};
+
+export default GetWbotMessage;