<?php
// Hook into osTicket events
class CaldavHooks {
    
    static function onTicketCreated($ticket) {
        // Trigger calendar entry creation when ticket is created
        $config = Plugin::getConfig('caldav');
        if ($config && $config['calendar_url'] && $config['app_token']) {
            self::createCalendarEntry($ticket, $config);
        }
    }

    static function createCalendarEntry($ticket, $config) {
        // Your CalDAV implementation here
        $url = $config['calendar_url'];
        $token = $config['app_token'];
        
        // Example using cURL for CalDAV operations:
        $icalData = self::generateIcalEvent($ticket);
        
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "PUT");
        curl_setopt($ch, CURLOPT_POSTFIELDS, $icalData);
        curl_setopt($ch, CURLOPT_HTTPHEADER, [
            'Content-Type: text/calendar',
            'Authorization: Bearer ' . $token
        ]);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        
        $response = curl_exec($ch);
        $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
        curl_close($ch);
        
        // Handle response (log errors, etc.)
        if ($httpCode >= 200 && $httpCode < 300) {
            // Success
        } else {
            // Log error
            error_log("CalDAV Error: " . $response);
        }
    }

    static function generateIcalEvent($ticket) {
        $summary = 'Ticket #' . $ticket->getNumber();
        $description = $ticket->getSubject();
        
        return "BEGIN:VCALENDAR\n" .
               "VERSION:2.0\n" .
               "PRODID:-//osTicket CalDAV Plugin\n" .
               "BEGIN:VEVENT\n" .
               "UID:" . uniqid() . "@osticket.com\n" .
               "DTSTAMP:" . date('Ymd\THis\Z') . "\n" .
               "DTSTART:" . date('Ymd\THis\Z') . "\n" .
               "SUMMARY:" . $summary . "\n" .
               "DESCRIPTION:" . $description . "\n" .
               "END:VEVENT\n" .
               "END:VCALENDAR";
    }
}
?>