link-stack/apps/bridge-worker/tasks/signal/send-signal-message.ts

import { db, getWorkerUtils } from "@link-stack/bridge-common";
import * as signalApi from "@link-stack/signal-api";
const { Configuration, MessagesApi, GroupsApi } = signalApi;

interface SendSignalMessageTaskOptions {
  token: string;
  to: string;
  message: any;
  conversationId?: string; // Zammad ticket/conversation ID for callback
  quoteMessage?: string; // Optional: message text to quote
  quoteAuthor?: string; // Optional: author of quoted message (phone number)
  quoteTimestamp?: number; // Optional: timestamp of quoted message in milliseconds
}

const sendSignalMessageTask = async ({
  token,
  to,
  message,
  conversationId,
  quoteMessage,
  quoteAuthor,
  quoteTimestamp,
}: SendSignalMessageTaskOptions): Promise<void> => {
  console.log(`[send-signal-message] Processing outgoing message:`, {
    token,
    to,
    conversationId,
    messageLength: message?.length,
  });
  const bot = await db
    .selectFrom("SignalBot")
    .selectAll()
    .where("token", "=", token)
    .executeTakeFirstOrThrow();

  const { phoneNumber: number } = bot;
  const config = new Configuration({
    basePath: process.env.BRIDGE_SIGNAL_URL,
  });
  const messagesClient = new MessagesApi(config);
  const groupsClient = new GroupsApi(config);
  const worker = await getWorkerUtils();

  let finalTo = to;
  let groupCreated = false;

  try {
    // Check if 'to' is a group ID (UUID format) vs phone number
    const isGroupId =
      /^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/i.test(
        to,
      );
    const enableAutoGroups = process.env.BRIDGE_SIGNAL_AUTO_GROUPS === "true";
    
    console.log(`[send-signal-message] Recipient analysis:`, {
      to,
      isGroupId,
      enableAutoGroups,
      shouldCreateGroup: enableAutoGroups && !isGroupId && to && conversationId,
    });

    // If sending to a phone number and auto-groups is enabled, create a group first
    if (enableAutoGroups && !isGroupId && to && conversationId) {
      try {
        const groupName = `Support: ${to}`;
        const createGroupResponse = await groupsClient.v1GroupsNumberPost({
          number: bot.phoneNumber,
          data: {
            name: groupName,
            members: [to],
            description: "Private support conversation",
          },
        });

        if (createGroupResponse.id) {
          // Get the internal_id for this group
          // Sometimes the API needs a moment to return the new group, so retry if needed
          let internalId: string | undefined;
          let retries = 3;
          
          while (retries > 0 && !internalId) {
            try {
              const groupsResponse = await groupsClient.v1GroupsNumberGet({
                number: bot.phoneNumber,
              });
              
              // Find the group we just created to get its internal_id
              const createdGroup = groupsResponse.find(g => g.id === createGroupResponse.id);
              internalId = createdGroup?.internal_id;
              
              if (!internalId && retries > 1) {
                console.log(`[send-signal-message] Group not found in list yet, retrying...`);
                await new Promise(resolve => setTimeout(resolve, 1000));
              }
            } catch (error) {
              console.error(`[send-signal-message] Error fetching groups:`, error);
            }
            retries--;
          }
          
          finalTo = createGroupResponse.id;
          groupCreated = true;
          console.log(
            `[send-signal-message] Created new Signal group:`,
            {
              groupId: finalTo,
              internalId,
              groupName,
              conversationId,
              originalRecipient: to,
              botNumber: bot.phoneNumber,
            },
          );

          // Notify Zammad about the new group ID via webhook
          await worker.addJob("common/notify-webhooks", {
            backendId: bot.id,
            payload: {
              event: "group_created",
              conversation_id: conversationId,
              original_recipient: to,
              group_id: finalTo,
              internal_group_id: internalId,
              timestamp: new Date().toISOString(),
            },
          });
        }
      } catch (groupError) {
        console.error("[send-signal-message] Error creating Signal group:", {
          error: groupError instanceof Error ? groupError.message : groupError,
          to,
          conversationId,
        });
        // Continue with original recipient if group creation fails
      }
    }

    console.log(`[send-signal-message] Sending message via API:`, {
      fromNumber: number,
      toRecipient: finalTo,
      originalTo: to,
      recipientChanged: to !== finalTo,
      groupCreated,
    });
    
    // Build the message data with optional quote parameters
    const messageData: signalApi.ApiSendMessageV2 = {
      number,
      recipients: [finalTo],
      message,
    };

    // Add quote parameters if all are provided
    if (quoteMessage && quoteAuthor && quoteTimestamp) {
      messageData.quoteTimestamp = quoteTimestamp;
      messageData.quoteAuthor = quoteAuthor;
      messageData.quoteMessage = quoteMessage;
      
      console.log(`[send-signal-message] Including quote in message:`, {
        quoteAuthor,
        quoteMessage: quoteMessage.substring(0, 50) + '...',
        quoteTimestamp,
      });
    }

    const response = await messagesClient.v2SendPost({
      data: messageData,
    });

    console.log(
      `[send-signal-message] Message sent successfully:`,
      {
        to: finalTo,
        groupCreated,
        response: response?.timestamp || 'no timestamp',
      },
    );
  } catch (error) {
    console.error({ error });
    throw error;
  }
};

export default sendSignalMessageTask;