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<?php
namespace ipl\Web\FormElement\ScheduleElement;
use DateTime;
use ipl\Html\Attributes;
use ipl\Html\FormElement\BaseFormElement;
use ipl\Html\HtmlElement;
use ipl\Html\Text;
use ipl\I18n\Translation;
use ipl\Scheduler\Contract\Frequency;
use ipl\Scheduler\RRule;
class Recurrence extends BaseFormElement
{
use Translation;
protected $tag = 'div';
protected $defaultAttributes = ['class' => 'schedule-recurrences'];
/** @var callable A callable that generates a frequency instance */
protected $frequencyCallback;
/** @var callable A validation callback for the schedule element */
protected $validateCallback;
/**
* Set a validation callback that will be called when assembling this element
*
* @param callable $callback
*
* @return $this
*/
public function setValid(callable $callback): self
{
$this->validateCallback = $callback;
return $this;
}
/**
* Set a callback that generates an {@see Frequency} instance
*
* @param callable $callback
*
* @return $this
*/
public function setFrequency(callable $callback): self
{
$this->frequencyCallback = $callback;
return $this;
}
protected function assemble()
{
list($isValid, $reason) = ($this->validateCallback)();
if (! $isValid) {
// Render why we can't generate the recurrences
$this->addHtml(Text::create($reason));
return;
}
/** @var RRule $frequency */
$frequency = ($this->frequencyCallback)();
$recurrences = $frequency->getNextRecurrences(new DateTime(), 3);
if (! $recurrences->valid()) {
// Such a situation can be caused by setting an invalid end time
$this->addHtml(HtmlElement::create('p', null, Text::create($this->translate('Never'))));
return;
}
foreach ($recurrences as $recurrence) {
$this->addHtml(HtmlElement::create('p', null, $recurrence->format($this->translate('D, Y/m/d, H:i:s'))));
}
}
protected function registerAttributeCallbacks(Attributes $attributes)
{
parent::registerAttributeCallbacks($attributes);
$attributes
->registerAttributeCallback('frequency', null, [$this, 'setFrequency'])
->registerAttributeCallback('validate', null, [$this, 'setValid']);
}
}
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