feat: add ticket comments attachments and export

backend/apps/tickets/api.py

@@ -1,10 +1,23 @@
+import csv
+
 from django.contrib.auth import get_user_model
 from django.db.models import Q
+from django.http import HttpResponse
 from django.utils import timezone
 from ninja import Router
 
-from apps.tickets.models import Ticket, TicketEvent
-from apps.tickets.schemas import TicketIn, TicketOut, TicketStatusIn, TicketUpdateIn
+from apps.audit.models import OperationAuditLog
+from apps.tickets.models import Ticket, TicketAttachment, TicketComment, TicketEvent
+from apps.tickets.schemas import (
+    TicketAttachmentIn,
+    TicketAttachmentOut,
+    TicketCommentIn,
+    TicketCommentOut,
+    TicketIn,
+    TicketOut,
+    TicketStatusIn,
+    TicketUpdateIn,
+)
 from apps.tickets.services import transition_ticket
 
 router = Router(tags=["tickets"])
@@ -50,6 +63,33 @@ def list_tickets(request, status: str | None = None, q: str | None = None):
     return queryset[:100]
 
 
+@router.get("/export")
+def export_tickets(request):
+    response = HttpResponse(content_type="text/csv")
+    response["Content-Disposition"] = 'attachment; filename="tickets.csv"'
+    writer = csv.writer(response)
+    writer.writerow(["ticket_no", "title", "status", "priority", "created_at"])
+    for ticket in Ticket.objects.all().order_by("ticket_no"):
+        writer.writerow(
+            [
+                ticket.ticket_no,
+                ticket.title,
+                ticket.status,
+                ticket.priority,
+                ticket.created_at.isoformat(),
+            ]
+        )
+    OperationAuditLog.objects.create(
+        user=request.user if request.user.is_authenticated else None,
+        module="tickets",
+        action="export",
+        target_type="ticket",
+        result="success",
+        request_snapshot={},
+    )
+    return response
+
+
 @router.get("/{ticket_id}", response=TicketOut)
 def get_ticket(request, ticket_id: int):
     return Ticket.objects.get(id=ticket_id)
@@ -91,3 +131,34 @@ def update_ticket_status(request, ticket_id: int, payload: TicketStatusIn):
         payload.remark,
         request.user if request.user.is_authenticated else None,
     )
+
+
+@router.post("/{ticket_id}/comments", response=TicketCommentOut)
+def add_ticket_comment(request, ticket_id: int, payload: TicketCommentIn):
+    ticket = Ticket.objects.get(id=ticket_id)
+    comment = TicketComment.objects.create(
+        ticket=ticket,
+        content=payload.content,
+        comment_type=payload.comment_type,
+        visibility=payload.visibility,
+        created_by=request.user if request.user.is_authenticated else None,
+    )
+    TicketEvent.objects.create(
+        ticket=ticket,
+        event_type="commented",
+        to_value={"comment_id": comment.id, "comment_type": comment.comment_type},
+        operator=request.user if request.user.is_authenticated else None,
+    )
+    return comment
+
+
+@router.post("/{ticket_id}/attachments", response=TicketAttachmentOut)
+def add_ticket_attachment(request, ticket_id: int, payload: TicketAttachmentIn):
+    ticket = Ticket.objects.get(id=ticket_id)
+    attachment = TicketAttachment.objects.create(ticket=ticket, **payload.dict())
+    TicketEvent.objects.create(
+        ticket=ticket,
+        event_type="attachment_added",
+        to_value={"attachment_id": attachment.id, "file_name": attachment.file_name},
+    )
+    return attachment