All files / src/app/api/support/tickets/[id]/messages route.ts

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export const dynamic = "force-dynamic";

/**
 * Support Ticket Messages API
 * GET /api/support/tickets/[id]/messages - Get ticket messages
 * POST /api/support/tickets/[id]/messages - Add message to ticket
 */

import { NextRequest, NextResponse } from "next/server";
import { Session } from "next-auth";
import { prisma } from "@/lib/prisma";
import { CreateMessageSchema } from "@/lib/validation/support-schemas";
import { notifyAgentOfCustomerReply } from "@/lib/support/notification-utils";
import { TicketStatus, MessageSenderType, SupportTicketWithRelations } from "@/types/support";
import { logger } from "@/lib/logging";
import {
  withErrorHandling,
  withAuth,
  successResponse,
  createdResponse,
  ApiError } from "@/lib/api";
import { RouteContext } from "@/lib/api/middleware";

/**
 * GET /api/support/tickets/[id]/messages
 * Get ticket messages (customer view - excludes internal messages)
 */
async function handleGet(
  _request: NextRequest,
  context: RouteContext | undefined,
  session: Session
): Promise<NextResponse> {
  if (!context?.params) {
    throw ApiError.invalidId("ticket");
  }

  const { id } = await context.params;
  const userId = Number(session.user.id);

  // Verify ticket exists and belongs to user
  const ticket = await prisma.supportTicket.findUnique({
    where: { id },
    select: { id: true, userId: true }});

  if (!ticket) {
    throw ApiError.notFound("Ticket", id);
  }

  if (ticket.userId !== userId) {
    throw ApiError.forbidden("Access denied");
  }

  // Get messages (exclude internal messages for customers)
  const messages = await prisma.supportMessage.findMany({
    where: {
      ticketId: id,
      isInternal: false},
    include: {
      sender: {
        select: { id: true, name: true }},
      attachments: true},
    orderBy: { createdAt: "asc" }});

  return successResponse(messages);
}

export const GET = withErrorHandling(withAuth(handleGet));

/**
 * POST /api/support/tickets/[id]/messages
 * Add message to ticket (customer reply)
 */
async function handlePost(
  request: NextRequest,
  context: RouteContext | undefined,
  session: Session
): Promise<NextResponse> {
  if (!context?.params) {
    throw ApiError.invalidId("ticket");
  }

  const { id } = await context.params;
  const userId = Number(session.user.id);
  const userName = session.user.name || "Customer";

  // Verify ticket exists and belongs to user
  const ticket = await prisma.supportTicket.findUnique({
    where: { id },
    include: {
      assignedTo: {
        select: { id: true, name: true, email: true }}}});

  if (!ticket) {
    throw ApiError.notFound("Ticket", id);
  }

  if (ticket.userId !== userId) {
    throw ApiError.forbidden("Access denied");
  }

  // Check if ticket is closed/cancelled
  if (ticket.status === TicketStatus.CLOSED || ticket.status === TicketStatus.CANCELLED) {
    throw ApiError.validation("Cannot add messages to a closed ticket");
  }

  // Validate input
  const body = await request.json();
  const validationResult = CreateMessageSchema.safeParse(body);
  if (!validationResult.success) {
    throw ApiError.validation(
      "Validation failed",
      validationResult.error.flatten().fieldErrors
    );
  }

  const data = validationResult.data;

  // Create the message
  const message = await prisma.supportMessage.create({
    data: {
      ticketId: id,
      senderType: MessageSenderType.CUSTOMER,
      senderId: userId,
      senderName: userName,
      content: data.content,
      isInternal: false, // Customer messages are never internal
    },
    include: {
      sender: {
        select: { id: true, name: true }},
      attachments: true}});

  // Update ticket status to AWAITING_AGENT if it was AWAITING_CUSTOMER
  if (ticket.status === TicketStatus.AWAITING_CUSTOMER) {
    await prisma.supportTicket.update({
      where: { id },
      data: { status: TicketStatus.AWAITING_AGENT }});
  }

  // Notify assigned agent
  if (ticket.assignedToId) {
    await notifyAgentOfCustomerReply(
      ticket as unknown as SupportTicketWithRelations,
      userName
    );
  }

  logger.info("Customer message added to ticket", {
    category: "API",
    ticketId: id,
    messageId: message.id,
    userId});

  return createdResponse(message);
}

export const POST = withErrorHandling(withAuth(handlePost));