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<?php |
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namespace Recurrence\RruleTransformer; |
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/** |
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* Class DtStartTransformer |
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* @package Recurrence\RruleTransformer |
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*/ |
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class DtStartTransformer extends AbstractRruleTransformer implements TransformerInterface |
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{ |
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const RRULE_PARAMETER = 'DTSTART'; |
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/** |
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* @var array |
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*/ |
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private $datePatterns = [ |
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[ |
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'pattern' => '[0-9]{8}T[0-9]{6}Z', |
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'date_format' => 'Ymd\THisZ', |
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'timezone' => 'UTC', |
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], |
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[ |
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'pattern' => '[0-9]{8}T[0-9]{6}', |
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'date_format' => 'Ymd\THis', |
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'timezone' => null, |
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], |
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[ |
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'pattern' => '[0-9]{8}', |
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'date_format' => 'Ymd', |
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'timezone' => null, |
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], |
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]; |
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/** |
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* @param string $rRule |
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* @return \DateTime |
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*/ |
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public function transform($rRule) |
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{ |
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if (preg_match('/'.$this::RRULE_PARAMETER.';TZID=([a-zA-Z_-]+[\/[a-zA-Z_+\-0-9]+]?):([0-9]{8}T[0-9]{6})/', $rRule, $matches)) { |
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try { |
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return $this->createDate('Ymd\THis', $matches[2], new \DateTimeZone($matches[1])); |
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} catch (\Exception $e) { |
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throw new \InvalidArgumentException(sprintf('Invalid RRULE [%s] option : [%s] with timezone [%s]', $this::RRULE_PARAMETER, $matches[2], $matches[1])); |
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} |
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} |
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// Process each supported date patterns and try to create \Datetime |
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foreach ($this->datePatterns as $datePattern) { |
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if (preg_match(sprintf('/%s=(%s)/', $this::RRULE_PARAMETER, $datePattern['pattern']), $rRule, $matches)) { |
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return $this->createDate( |
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$datePattern['date_format'], |
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$matches[1], |
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(($datePattern['timezone']) ? new \DateTimeZone($datePattern['timezone']) : new \DateTimeZone(date_default_timezone_get())) |
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); |
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} |
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} |
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$this->throwExceptionOnInvalidParameter($rRule, $this::RRULE_PARAMETER); |
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return null; |
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} |
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/** |
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* @param string $format |
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* @param string $time |
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* @param \DateTimeZone $timezone |
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* @return \DateTime|null |
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*/ |
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private function createDate($format, $time, \DateTimeZone $timezone) |
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{ |
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$date = \DateTime::createFromFormat($format, $time, $timezone); |
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return ($date) ? $date : null; |
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} |
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} |
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Samffy /
recurrence
