prvi kod za live uporabu

backend/modules/task_management/services.py

@@ -0,0 +1,48 @@
+# backend/modules/task_management/services.py
+
+from .models import Task
+from rest_framework.exceptions import ValidationError
+from django.core.exceptions import ValidationError as DjangoValidationError
+import logging
+
+logger = logging.getLogger(__name__)
+
+class TaskService:
+    @staticmethod
+    def create_task_entry(data: dict, user=None) -> Task:
+        """
+        Univerzalna metoda: prihvaća podatke i opcionalnog korisnika.
+        """
+        # Poslovna pravila
+        if data.get('status') == 'DONE' and (user and not user.is_staff):
+            raise ValidationError({"status": "Samo admini mogu odmah označiti zadatak kao gotov."})
+
+        payload = dict(data)
+        if user and 'assigned_to' not in payload:
+            payload['assigned_to'] = user
+
+        entry = Task(**payload)
+        try:
+            entry.full_clean()
+        except DjangoValidationError as exc:
+            logger.error(f"Neuspješna validacija zadatka: {exc}")
+            raise ValidationError(exc.message_dict if hasattr(exc, 'message_dict') else exc.messages)
+        entry.save()
+        logger.info(f"Zadatak uspješno kreiran: {entry.id}")
+        return entry
+
+    @staticmethod
+    def update_task_entry(instance, data, user):
+        # Validacija za update (npr. samo vlasnik ili admin smije ažurirati)
+        if not user.is_staff and instance.assigned_to != user:
+            raise ValidationError("Nemate dozvolu za izmjenu ovog zadatka.")
+        
+        # Spremanje
+        for attr, value in data.items():
+            setattr(instance, attr, value)
+        try:
+            instance.full_clean()
+        except DjangoValidationError as exc:
+            raise ValidationError(exc.message_dict if hasattr(exc, 'message_dict') else exc.messages)
+        instance.save()
+        return instance