ungana

commit d73b0d2765ec641e5e3d232733d91de07c5fdf97
parent 9ef47194b8cf04fa013c4b497bb2675f77605626
Author: Carlosokumu <carlosokumu254@gmail.com>
Date:   Sat, 23 Aug 2025 16:03:02 +0300

extend  IcalManager:
-  update generate_uuid to generate a globally unique UID using UUID + domain format for new event entries.
- update load_ical_file  to return a calendar instance if the the provided ical_path does not exist.
-  add check_existing_event  to check if an event with same summary,start and end already exists.

Diffstat:
M
calendarapp/ical/ical_manager.py
 | 
62
+++++++++++++++++++++++++++++++++++++++++++++++++++++++-------

1 file changed, 55 insertions(+), 7 deletions(-)
diff --git a/calendarapp/ical/ical_manager.py b/calendarapp/ical/ical_manager.py
@@ -1,8 +1,11 @@
 import os
-from icalendar import Calendar, Event, vDuration
+import uuid
+from zoneinfo import ZoneInfo
+from icalendar import Calendar, Event
 from datetime import datetime, timedelta, timezone
 from typing import Dict, Any
 
+
 class ICalManager:
 
     """Handles parsing, representing, and writing iCalendar files"""
@@ -39,7 +42,7 @@ class ICalManager:
         if 'uid' in event_data:
             event.add('uid', event_data['uid'])
         else:
-            event.add('uid', self._generate_uid(start_dt))
+            event.add('uid', self._generate_uid())
 
         return event
 
@@ -103,14 +106,21 @@ class ICalManager:
 
         return timedelta(hours=hours, minutes=minutes)
 
-    def _generate_uid(self, dtstart: datetime) -> str:
-        """Generate a unique ID based on event start time."""
-        return f"{dtstart.strftime('%Y%m%dT%H%M%S')}@calendarapp"
+
+    def _generate_uid(self) -> str:
+        """Generate a globally unique UID using UUID + domain style."""
+        domain = "calendarapp.org"  # you can set this to your app's domain
+        return f"{uuid.uuid4()}@{domain}"
     
+
     def load_ical_file(self, filename: str) -> Calendar:
-        """Load an iCalendar file from disk with error handling."""
+        """Load an iCalendar file from disk, or return a new Calendar if missing."""
         if not os.path.exists(filename):
-            raise FileNotFoundError(f"iCalendar file '{filename}' does not exist.")
+            ## return a new Calendar instance if the provided ical_path is missing
+            cal = Calendar()
+            cal.add('VERSION', '2.0')
+            cal.add('PRODID', '-//CalendarApp//mxm.dk//')
+            return cal
         
         try:
             with open(filename, 'rb') as f:
@@ -139,6 +149,44 @@ class ICalManager:
             if component.name == "VEVENT":
                 return component  
         return None 
+    
+    
+    def check_existing_event(self,cal: Calendar,event_data: Event) -> bool:
+        tzid = event_data.get("tzid")
+
+        candidate_key = (
+            self.normalize_ical_field(event_data.get("start"), tzid),
+            self.normalize_ical_field(event_data.get("end"), tzid),
+            self.normalize_ical_field(event_data.get("summary")),
+        )
+        for component in cal.walk("VEVENT"):
+            existing_key = (
+                self.normalize_ical_field(component.get("DTSTART"), tzid),
+                self.normalize_ical_field(component.get("DTEND"), tzid),
+                self.normalize_ical_field(component.get("SUMMARY")),
+            )
+            if existing_key == candidate_key:
+                return True
+        return False
+
+    
+    def normalize_ical_field(self, value, tzid: str | None = None):
+        if isinstance(value, list):
+            value = value[0]
+        if hasattr(value, "dt"):
+            value = value.dt
+
+        if isinstance(value, datetime):
+            if value.tzinfo is None and tzid:
+                return value.replace(tzinfo=ZoneInfo(tzid))
+            return value
+
+        if hasattr(value, "to_ical"):
+            return value.to_ical().decode()
+
+        return str(value)  
+   
+
 
     def save_ical_file(self, event: Event, filename: str) -> None:
         """Save calendar with event to .ics file."""