syncEvents

public function syncEvents(User $user, string $calendarId, ?string $syncToken = null)
{
    try {
        $params = [
            'maxResults' => 2500,
            'singleEvents' => true,
        ];

        if ($syncToken) {
            $params['syncToken'] = $syncToken;
        } else {
            // If no sync token, use timeMin for full sync
            $params['timeMin'] = date(DATE_RFC3339, strtotime('-30 days'));
        }

        $pageToken = null;
        $newSyncToken = null;

        do {
            if ($pageToken) {
                $params['pageToken'] = $pageToken;
            }

            $events = $this->calendarService->events->listEvents($calendarId, $params);
            $pageToken = $events->getNextPageToken();
            $newSyncToken = $events->getNextSyncToken();

            foreach ($events->getItems() as $event) {
                // Process each event - update your local database
                $this->processEvent($user, $calendarId, $event);
            }
        } while ($pageToken);

        // Update the sync token in database
        if ($newSyncToken) {
            CalendarWebhook::where('user_id', $user->id)
                ->where('calendar_id', $calendarId)
                ->update(['sync_token' => $newSyncToken]);
        }

        return true;
    } catch (\Exception $e) {
        // Handle sync token expired
        if (strpos($e->getMessage(), 'Sync token') !== false) {
            // Clear sync token and do a full sync
            CalendarWebhook::where('user_id', $user->id)
                ->where('calendar_id', $calendarId)
                ->update(['sync_token' => null]);

            // Try again without sync token
            return $this->syncEvents($user, $calendarId, null);
        }

        Log::error('Failed to sync Google Calendar events: ' . $e->getMessage());
        return false;
    }
}