fix: alerts are not properly implemented (fix #39) (#41)

* fix: use icalendar.Alarm to properly create alerts

* rename icalendar's alert to alarm

* docs: update readme

README.md

@@ -51,7 +51,8 @@ You are recommended to import the ics file into a separate calendar (take google
 icalendar==5.0.12
 
 # Limitations
-Currently, TimeTree data can only be downloaded manually through a web browser.
+1. Currently, TimeTree data can only be downloaded manually through a web browser.
+2. Alarms(Alerts) can't be imported to Google Calendar through iCal format due to Google's bug.
 
 # Support
 If you think it's helpful, kindly support me!

timetree_exporter/formatter.py

@@ -6,7 +6,7 @@
 import logging
 from datetime import datetime, timedelta
 from zoneinfo import ZoneInfo
-from icalendar import Event, vRecur, vDate, vDatetime, vGeo
+from icalendar import Event, vRecur, vDate, vDatetime, vGeo, Alarm
 from icalendar.prop import vDDDLists
 from icalendar.parser import Contentline
 from timetree_exporter.event import (
@@ -126,16 +126,16 @@ def dtend(self):
         return self.get_datetime(is_start_time=False)
 
     @property
-    def alerts(self):
-        """Return the alerts of the event."""
-        alerts = []
+    def alarms(self):
+        """Return the alarms of the event."""
+        alarms = []
         for alert in self.time_tree_event.alerts:
-            alarm = Event()
+            alarm = Alarm()
             alarm.add("action", "DISPLAY")
             alarm.add("description", "Reminder")
             alarm.add("trigger", timedelta(minutes=-alert))
-            alerts.append(alarm)
-        return alerts
+            alarms.append(alarm)
+        return alarms
 
     def add_recurrences(self, event):
         """Add recurrences to iCal event"""
@@ -205,8 +205,8 @@ def to_ical(self) -> Event:
         if self.related_to:
             event.add("related-to", self.related_to)
 
-        for alert in self.alerts:
-            event.add_component(alert)
+        for alarm in self.alarms:
+            event.add_component(alarm)
 
         self.add_recurrences(event)