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<?php |
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namespace Spatie\CalendarLinks\Generators; |
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use Spatie\CalendarLinks\Link; |
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use Spatie\CalendarLinks\Generator; |
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/** |
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* @see https://icalendar.org/RFC-Specifications/iCalendar-RFC-5545/ |
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*/ |
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class Ics implements Generator |
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{ |
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public function generate(Link $link): string |
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{ |
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$url = [ |
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'BEGIN:VCALENDAR', |
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'VERSION:2.0', |
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'BEGIN:VTIMEZONE', |
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'TZID:'.$link->from->format('e'), |
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'END:VTIMEZONE', |
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'BEGIN:VEVENT', |
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'UID:'.$this->generateEventUid($link), |
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'SUMMARY:'.$link->title, |
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]; |
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if ($link->allDay) { |
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$dateTimeFormat = 'Ymd'; |
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$url[] = 'DTSTART:'.$link->from->format($dateTimeFormat); |
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$url[] = 'DURATION:P1D'; |
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} else { |
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$dateTimeFormat = "e:Ymd\THis"; |
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$url[] = 'DTSTART;TZID='.$link->from->format($dateTimeFormat); |
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$url[] = 'DTEND;TZID='.$link->to->format($dateTimeFormat); |
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} |
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if ($link->description) { |
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$url[] = 'DESCRIPTION:'.$this->escapeString($link->description); |
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} |
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if ($link->address) { |
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$url[] = 'LOCATION:'.$this->escapeString($link->address); |
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} |
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if (! empty($link->attendees)) { |
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foreach ($link->attendees as $attendee) { |
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$url[] = 'ATTENDEE:'.$attendee; |
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} |
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} |
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$url[] = 'END:VEVENT'; |
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$url[] = 'END:VCALENDAR'; |
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$redirectLink = implode('%0d%0a', $url); |
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return 'data:text/calendar;charset=utf8,'.$redirectLink; |
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} |
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/** @see https://tools.ietf.org/html/rfc5545.html#section-3.3.11 */ |
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protected function escapeString(string $field): string |
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{ |
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return addcslashes($field, "\n,;"); |
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} |
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/** @see https://tools.ietf.org/html/rfc5545#section-3.8.4.7 */ |
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protected function generateEventUid(Link $link): string |
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{ |
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return md5($link->from->format(\DateTime::ATOM).$link->to->format(\DateTime::ATOM).$link->title.$link->address); |
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} |
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} |
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spatie /
calendar-links
