Add permission

Author: ahmedxgouda

backend/apps/nest/auth/calendar_events.py

@@ -0,0 +1,13 @@
+"""Nest calendar events authorization permissions."""
+
+from apps.owasp.models.entity_member import EntityMember
+from apps.slack.models.member import Member
+
+
+def has_calendar_events_permission(slack_user_id: str):
+    """Check if a user has permission to access calendar events feature."""
+    try:
+        member = Member.objects.get(slack_user_id=slack_user_id)
+    except Member.DoesNotExist:
+        return False
+    return EntityMember.objects.filter(member=member.user, role=EntityMember.Role.LEADER).exists()