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<?php
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namespace Del\Form\Renderer\Field;
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use Del\Form\Field\FieldInterface;
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use Del\Form\Field\Radio;
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use DOMDocumentFragment;
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use DOMElement;
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use DOMNode;
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use DOMText;
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use InvalidArgumentException;
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use LogicException;
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class RadioRender extends AbstractFieldRender
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{
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/** @var DOMDocumentFragment $div */
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private $fragment;
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private $counter = 0;
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/**
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* @param FieldInterface $field
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* @param DOMElement $element
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* @return DOMNode
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*/
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public function renderBlock(FieldInterface $field, DOMElement $element)
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{
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// We don't really want a containing div, so we'll ignore $element
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// and instead create a DOMDocumentFragment
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unset($element);
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$this->fragment = $this->getDom()->createDocumentFragment();
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// Make sure the FieldInterface is actually a Radio
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if (!$field instanceof Radio) {
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throw new InvalidArgumentException('Must be a Del\Form\Field\Radio');
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}
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$inline = $field->isRenderInline();
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$options = $field->getOptions();
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if (empty($options)) {
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throw new LogicException('You must set at least one option.');
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}
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// Loop through each radio element (the options)
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foreach ($options as $value => $label) {
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$radio = $this->renderRadio($field, $value, $label, $inline);
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$this->fragment->appendChild($radio);
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}
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return $this->fragment;
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}
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/**
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* @param FieldInterface $field
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* @param $value
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* @param $labelText
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* @param $inline
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* @return DOMElement
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*/
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private function renderRadio(FieldInterface $field, $value, $labelText, $inline)
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{
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$div = $this->createElement('div');
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$class = $inline ? 'form-check-inline' : 'form-check';
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$div->setAttribute('class', $class);
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$radio = $this->renderRadioInline($field, $value, $labelText);
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$label = $this->getLabel($field, $labelText);
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$div->appendChild($radio);
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$div->appendChild($label);
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return $div;
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}
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/**
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* @param FieldInterface $field
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* @param string $labelText
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* @return DOMElement
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*/
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private function getLabel(FieldInterface $field, string $labelText): DOMElement
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{
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$this->counter ++;
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$label = $this->getDom()->createElement('label');
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$label->setAttribute('for', $field->getId() . $this->counter);
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$label->setAttribute('class', 'form-check-label');
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$text = $this->createText($labelText);
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$label->appendChild($text);
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return $label;
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}
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/**
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* @param FieldInterface $field
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* @param $value
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* @param $labelText
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* @return DOMElement
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*/
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private function renderRadioInline(FieldInterface $field, $value, $labelText)
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{
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$radio = $this->createElement('input');
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$radio->setAttribute('class', 'form-check-input');
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$radio->setAttribute('type', 'radio');
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$radio->setAttribute('name', $field->getName());
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$radio->setAttribute('value', $value);
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$text = $this->createText($labelText);
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if ($field->getValue() == $radio->getAttribute('value')) {
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$radio->setAttribute('checked', 'checked');
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}
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return $radio;
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}
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}
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In the issue above, the returned value is violating the contract defined by the mentioned interface.
Let's take a look at an example: