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<?php |
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namespace Spatie\CalendarLinks\Generators; |
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use Spatie\CalendarLinks\Generator; |
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use Spatie\CalendarLinks\Link; |
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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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/** @var string {@see https://www.php.net/manual/en/function.date.php} */ |
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protected $dateFormat = 'Ymd'; |
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protected $dateTimeFormat = 'e:Ymd\THis'; |
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/** @var array */ |
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protected $options = []; |
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public function __construct(array $options = []) |
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{ |
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$this->options = $options; |
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} |
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/** {@inheritdoc} */ |
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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:VEVENT', |
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'UID:'.($this->options['UID'] ?? $this->generateEventUid($link)), |
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'SUMMARY:'.$this->escapeString($link->title), |
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]; |
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$dateTimeFormat = $link->allDay ? $this->dateFormat : $this->dateTimeFormat; |
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if ($link->allDay) { |
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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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$url[] = 'DTSTART;TZID='.$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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$url[] = 'END:VEVENT'; |
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$url[] = 'END:VCALENDAR'; |
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return $this->buildLink($url); |
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} |
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protected function buildLink(array $propertiesAndComponents): string |
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{ |
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return 'data:text/calendar;charset=utf8;base64,'.base64_encode(implode("\r\n", $propertiesAndComponents)); |
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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, "\r\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 $link): string |
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{ |
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return md5(sprintf( |
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'%s%s%s%s', |
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$link->from->format(\DateTimeInterface::ATOM), |
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$link->to->format(\DateTimeInterface::ATOM), |
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$link->title, |
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$link->address |
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)); |
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} |
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} |
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spatie /
calendar-links
