Calendar Management

class Calendar(DAVObject):
    def events(self):
        """
        Get all events in this calendar.
        
        Returns:
        list[Event]: List of Event objects
        """
    
    def todos(self):
        """
        Get all todos/tasks in this calendar.
        
        Returns:
        list[Todo]: List of Todo objects
        """
    
    def journals(self):
        """
        Get all journal entries in this calendar.
        
        Returns:
        list[Journal]: List of Journal objects
        """
    
    def freebusy(self):
        """
        Get all free/busy objects in this calendar.
        
        Returns:
        list[FreeBusy]: List of FreeBusy objects
        """
    
    def objects(self, load_objects=False, sort=None):
        """
        Get all calendar objects of all types.
        
        Parameters:
        - load_objects: bool, whether to load full object data
        - sort: str, sort order for objects
        
        Returns:
        list[CalendarObjectResource]: All objects in calendar
        """
    
    def objects_by_sync_token(self, sync_token=None, load_objects=True):
        """
        Retrieve objects using WebDAV synchronization for efficient updates.
        
        Parameters:
        - sync_token: str, synchronization token from previous sync
        - load_objects: bool, whether to load full object data (default True)
        
        Returns:
        tuple: (objects, new_sync_token) where objects is list of 
               CalendarObjectResource and new_sync_token is str
        """

import caldav

# Get calendar from principal
client = caldav.DAVClient(url="...", username="...", password="...")
principal = client.principal()
calendar = principal.calendars()[0]

# Get all events
all_events = calendar.events()
print(f"Found {len(all_events)} events")

# Get all todos
all_todos = calendar.todos()
for todo in all_todos:
    summary = todo.icalendar_component.get('SUMMARY', 'No title')
    print(f"Todo: {summary}")

# Note: No general objects() method available
# Use specific methods: calendar.events(), calendar.todos(), calendar.journals()

# Efficient synchronization
sync_token = None
while True:
    objects, new_sync_token = calendar.objects_by_sync_token(
        sync_token=sync_token,
        load_objects=True
    )
    
    if objects:
        print(f"Found {len(objects)} changed objects")
        # Process changed objects
        for obj in objects:
            print(f"Updated: {obj.id}")
    
    sync_token = new_sync_token
    break  # In real usage, would check for changes periodically

def save_event(self, ical, no_overwrite=False, no_create=False):
    """
    Save an event to this calendar.
    
    Parameters:
    - ical: str, iCalendar data (VCALENDAR format)
    - no_overwrite: bool, prevent overwriting existing events (default False)
    - no_create: bool, prevent creating new events (default False)
    
    Returns:
    Event: Saved Event object
    
    Raises:
    ConsistencyError: If no_overwrite=True and event exists
    NotFoundError: If no_create=True and event doesn't exist
    """

def save_todo(self, ical, no_overwrite=False, no_create=False):
    """
    Save a todo/task to this calendar.
    
    Parameters:
    - ical: str, iCalendar data (VCALENDAR format)
    - no_overwrite: bool, prevent overwriting existing todos
    - no_create: bool, prevent creating new todos
    
    Returns:
    Todo: Saved Todo object
    """

def save_journal(self, ical, no_overwrite=False, no_create=False):
    """
    Save a journal entry to this calendar.
    
    Parameters:
    - ical: str, iCalendar data (VCALENDAR format)
    - no_overwrite: bool, prevent overwriting existing journals
    - no_create: bool, prevent creating new journals
    
    Returns:
    Journal: Saved Journal object
    """

# Generic object creation
def save_object(self, objclass, ical=None, no_overwrite=False, no_create=False, **ical_data):
    """
    Save calendar object of any type.
    
    Parameters:
    - objclass: class, calendar object class (Event, Todo, Journal, FreeBusy)
    - ical: str, iCalendar data (alternative to **ical_data)
    - no_overwrite: bool, prevent overwriting existing objects
    - no_create: bool, prevent creating new objects
    - **ical_data: additional iCalendar properties
    
    Returns:
    CalendarObjectResource: Saved object
    """

def save_with_invites(self, ical, attendees, **attendeeoptions):
    """
    Save calendar object and send invitations to attendees.
    
    Parameters:
    - ical: str, iCalendar data
    - attendees: list[str], attendee email addresses
    - **attendeeoptions: additional attendee options
    
    Returns:
    CalendarObjectResource: Saved object with invitations sent
    """

# Convenient aliases
def add_event(self, ical, no_overwrite=False, no_create=False):
    """Alias for save_event."""

def add_todo(self, ical, no_overwrite=False, no_create=False):
    """Alias for save_todo."""

def add_journal(self, ical, no_overwrite=False, no_create=False):
    """Alias for save_journal."""

# Create a new event
event_ical = """BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//My App//My App//EN
BEGIN:VEVENT
UID:meeting-001@example.com
DTSTART:20250915T140000Z
DTEND:20250915T150000Z
SUMMARY:Team Meeting
DESCRIPTION:Weekly team sync meeting
LOCATION:Conference Room A
END:VEVENT
END:VCALENDAR"""

# Save the event
event = calendar.save_event(event_ical)
print(f"Created event with UID: {event.id}")

# Create a todo
todo_ical = """BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//My App//My App//EN
BEGIN:VTODO
UID:task-001@example.com
SUMMARY:Complete project documentation
DESCRIPTION:Finish writing the API documentation
DUE:20250920T170000Z
PRIORITY:1
STATUS:NEEDS-ACTION
END:VTODO
END:VCALENDAR"""

# Save with no overwrite to prevent accidents
todo = calendar.save_todo(todo_ical, no_overwrite=True)

# Create journal entry
journal_ical = """BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//My App//My App//EN
BEGIN:VJOURNAL
UID:journal-001@example.com
DTSTART:20250915T090000Z
SUMMARY:Daily standup notes
DESCRIPTION:Discussed sprint progress and blockers
END:VJOURNAL
END:VCALENDAR"""

journal = calendar.add_journal(journal_ical)

def event_by_url(self, href):
    """
    Get event by its URL/href.
    
    Parameters:
    - href: str, event URL or href
    
    Returns:
    Event: Event object or None if not found
    """

def event_by_uid(self, uid):
    """
    Get event by its UID.
    
    Parameters:
    - uid: str, event UID
    
    Returns:
    Event: Event object or None if not found
    """

def todo_by_uid(self, uid):
    """
    Get todo by its UID.
    
    Parameters:
    - uid: str, todo UID
    
    Returns:
    Todo: Todo object or None if not found
    """

def journal_by_uid(self, uid):
    """
    Get journal entry by its UID.
    
    Parameters:
    - uid: str, journal UID
    
    Returns:
    Journal: Journal object or None if not found
    """

def object_by_uid(self, uid):
    """
    Get any calendar object by its UID.
    
    Parameters:
    - uid: str, object UID
    
    Returns:
    CalendarObjectResource: Object or None if not found
    """

def search(self, xml_query=None, comp_filter=None, prop_filter=None, 
           text_match=None, start=None, end=None, expand=False, verify_expand=True):
    """
    Advanced search for calendar objects with multiple filter options.
    
    Parameters:
    - xml_query: str, raw CalDAV XML query
    - comp_filter: str, component filter (e.g., "VEVENT", "VTODO")
    - prop_filter: dict, property filters {property: value}
    - text_match: str, text search in summaries and descriptions
    - start: datetime, start of date range
    - end: datetime, end of date range
    - expand: bool, expand recurring events within date range
    - verify_expand: bool, verify expanded events (default True)
    
    Returns:
    list[CalendarObjectResource]: Matching calendar objects
    """

def date_search(self, start, end=None, compfilter=None, expand=False, verify_expand=True):
    """
    Search for calendar objects within a date range.
    
    Parameters:
    - start: datetime, start of search range
    - end: datetime, end of search range (if None, searches from start forward)
    - compfilter: str, component type filter ("VEVENT", "VTODO", "VJOURNAL")
    - expand: bool, expand recurring events within range
    - verify_expand: bool, verify expanded recurring events
    
    Returns:
    list[CalendarObjectResource]: Objects within date range
    """

from datetime import datetime, timedelta

# Find events in the next week
start_date = datetime.now()
end_date = start_date + timedelta(days=7)

upcoming_events = calendar.date_search(
    start=start_date,
    end=end_date,
    compfilter="VEVENT",
    expand=True  # Expand recurring events
)

print(f"Found {len(upcoming_events)} upcoming events")
for event in upcoming_events:
    summary = event.icalendar_component.get('SUMMARY', 'No title')
    dtstart = event.icalendar_component.get('DTSTART').dt
    print(f"  {dtstart}: {summary}")

# Search for todos with text matching
urgent_todos = calendar.search(
    comp_filter="VTODO",
    text_match="urgent",
    prop_filter={"STATUS": "NEEDS-ACTION"}
)

# Complex search with XML query
xml_query = """
<C:calendar-query xmlns:C="urn:ietf:params:xml:ns:caldav">
  <D:prop xmlns:D="DAV:">
    <D:getetag/>
    <C:calendar-data/>
  </D:prop>
  <C:filter>
    <C:comp-filter name="VCALENDAR">
      <C:comp-filter name="VEVENT">
        <C:prop-filter name="SUMMARY">
          <C:text-match collation="i;ascii-casemap">meeting</C:text-match>
        </C:prop-filter>
      </C:comp-filter>
    </C:comp-filter>
  </C:filter>
</C:calendar-query>"""

meetings = calendar.search(xml_query=xml_query)

# Look up specific objects
specific_event = calendar.event_by_uid("meeting-001@example.com")
if specific_event:
    print(f"Found event: {specific_event.icalendar_component['SUMMARY']}")

# Find any object type by UID
any_object = calendar.object_by_uid("some-uid@example.com")
if any_object:
    print(f"Object type: {any_object.__class__.__name__}")

def freebusy_request(self, start, end, attendees=None):
    """
    Request free/busy information for a time range.
    
    Parameters:
    - start: datetime, start of time range
    - end: datetime, end of time range
    - attendees: list[str], attendee email addresses (optional)
    
    Returns:
    FreeBusy: Free/busy information object
    """

@property
def supported_calendar_component_set(self):
    """Get supported calendar component types for this calendar."""

def get_supported_components(self):
    """
    Get the set of supported component types.
    
    Returns:
    set[str]: Set of supported component types (VEVENT, VTODO, etc.)
    """

# Check what components this calendar supports
supported = calendar.get_supported_components()
print(f"Calendar supports: {', '.join(supported)}")

# Only create todos if supported
if 'VTODO' in supported:
    todo = calendar.save_todo(todo_ical)
else:
    print("This calendar doesn't support todos")

# Request free/busy for scheduling
from datetime import datetime, timedelta

meeting_start = datetime(2025, 9, 20, 14, 0)  # 2 PM
meeting_end = meeting_start + timedelta(hours=1)

freebusy_info = calendar.freebusy_request(
    start=meeting_start,
    end=meeting_end,
    attendees=["attendee1@example.com", "attendee2@example.com"]
)

# Check availability (implementation depends on server response format)
if freebusy_info:
    print("Free/busy information retrieved successfully")

# Common component filters
COMPONENT_FILTERS = {
    "events": "VEVENT",
    "todos": "VTODO", 
    "tasks": "VTODO",  # alias
    "journals": "VJOURNAL",
    "freebusy": "VFREEBUSY"
}

# Common property filters
PROPERTY_FILTERS = {
    # Todo status filters
    "pending_todos": {"STATUS": "NEEDS-ACTION"},
    "completed_todos": {"STATUS": "COMPLETED"},
    "in_progress_todos": {"STATUS": "IN-PROCESS"},
    
    # Event status filters  
    "confirmed_events": {"STATUS": "CONFIRMED"},
    "tentative_events": {"STATUS": "TENTATIVE"},
    "cancelled_events": {"STATUS": "CANCELLED"},
    
    # Priority filters
    "high_priority": {"PRIORITY": "1"},
    "medium_priority": {"PRIORITY": "5"},
    "low_priority": {"PRIORITY": "9"}
}