/**
* Add new element to group.
*
* @param \DeForm\Element\ElementInterface $element
* @return self
* @throw \InvalidArgumentException
*/
public function addElement(ElementInterface $element)
{
if (false === $element instanceof RadioElement) {
throw new \InvalidArgumentException('Only instance of RadioElement object can be added.');
}
if ($this->countElements() > 0 && $element->getName() !== $this->getName()) {
throw new \InvalidArgumentException('Attribute input[name] is invalid.');
}
$this->elements[] = $element;
return $this;
}
/**
* Map everything to an array.
*
* @return array
*/
public function toArray()
{
$array = [];
if (!empty($this->data)) {
$array['data'] = $this->data->toIdentifier();
}
if (!empty($this->meta)) {
$array['meta'] = $this->meta;
}
if (!empty($this->links)) {
$array['links'] = $this->links;
}
return $array;
}
public function distance(ElementInterface $a, ElementInterface $b)
{
$aCoordinates = $a->getCoordinates();
$bCoordinates = $b->getCoordinates();
if (array_keys($aCoordinates) != array_keys($bCoordinates)) {
throw new \InvalidArgumentException('Unequal elements\' dimensions');
}
$sum = 0;
foreach ($aCoordinates as $dimension => $value) {
$diff = abs($bCoordinates[$dimension] - $aCoordinates[$dimension]);
$sum += pow($diff, 2);
}
$distance = sqrt($sum);
return $distance;
}
/**
* Convert to BBCode
*
* Converts an individual node into a #text node containing a string of its BBCode equivalent.
*
* Example: An <h3> node with text content of 'Title' becomes a text node with content of '### Title'
*
* @param ElementInterface $element
*
* @return string The converted HTML as BBCode
*/
protected function convertToBBCode(ElementInterface $element)
{
$tag = $element->getTagName();
// Strip nodes named in remove_nodes
$tags_to_remove = explode(' ', $this->getConfig()->getOption('remove_nodes'));
if (in_array($tag, $tags_to_remove)) {
return false;
}
$converter = $this->environment->getConverterByTag($tag);
return $converter->convert($element);
}
