Squash merge feature/email-notifications into beta

claims/models.py

@@ -1,4 +1,7 @@
+import uuid
+
 from django.conf import settings
+from django.core.files.storage import default_storage
 from django.db import models
 from django.utils.translation import gettext_lazy as _
 
@@ -90,6 +93,22 @@ class Claim(models.Model):
             performed_by=performed_by,
         )
 
+    def save(self, *args, **kwargs):
+        if self.receipt and not kwargs.pop("skip_receipt_rename", False):
+            original_name = self.receipt.name or ""
+            ext = original_name.rsplit(".", 1)[-1] if "." in original_name else "dat"
+            new_name = self._generate_unique_receipt_name(ext)
+            self.receipt.name = new_name
+        super().save(*args, **kwargs)
+
+    def _generate_unique_receipt_name(self, ext):
+        ext = ext.lower()
+        for _ in range(10):
+            candidate = f"receipts/{uuid.uuid4().hex}.{ext}"
+            if not default_storage.exists(candidate):
+                return candidate
+        return f"receipts/{uuid.uuid4().hex}.{ext}"
+
 
 class ClaimLog(models.Model):
     class Action(models.TextChoices):