Ego_ICS.php

gehe zur Dokumentation dieser Datei

<?php
 
class Ego_ICS {
    private array $event_list = [];
 
    private array $calendar_props = [
        'VERSION' => '2.0',
        'PRODID' => '-//EGOTEC//EGOCMS v22//DE',
        'CALSCALE' => 'GREGORIAN',
        'METHOD' => 'PUBLISH'
    ];
 
    public function __construct(array $params) {
        $this->setProperties($params);
    }
 
    public function getICS(): string {
        $ics_content = ['BEGIN:VCALENDAR'];
 
        foreach ($this->calendar_props as $attr => $calendar_prop) {
            $ics_content[] = "$attr:$calendar_prop";
        }
 
        foreach ($this->event_list as $event) {
            $ics_content[] = 'BEGIN:VEVENT';
            foreach ($event as $attr => $param) {
                $ics_content[] = "$attr:$param";
            }
            $ics_content[] = 'END:VEVENT';
        }
 
        $ics_content[] = 'END:VCALENDAR';
 
        return implode(PHP_EOL, $ics_content);
    }
 
    public function setProperties(array $params) {
        foreach ($params as $attr => $param) {
            $this->calendar_props[strtoupper($attr)] = $this->sanitizeParam($attr, $param);
        }
    }
 
    public function addEvent(array $params) {
        $event_props = [
            'UID' => uniqid(),
            'DTSTAMP' => $this->formatDate('now')
        ];
 
        foreach ($params as $attr => $param) {
            $event_props[strtoupper($attr)] = $this->sanitizeParam($attr, $param);
        }
 
        $this->event_list[] = $event_props;
    }
 
    private function sanitizeParam(string $attr, string $param = ''): string {
        switch(strtoupper($attr)) {
            case 'DTEND':
            case 'DTSTAMP':
            case 'DTSTART':
                $param = $this->formatDate($param);
                break;
            default:
                $param = $this->escapeParam($param);
        }
        return $param;
    }
 
    private function formatDate(string $date): string {
        $dt = new DateTime($date);
        return $dt->format('Ymd\THis');
    }
 
    private function escapeParam(string $param): string {
        return preg_replace('/([\,;])/','\\\$1', $param);
    }
}