public function buildContent()
{
$ret = '';
if (empty($this->attributes['required'])) {
$ret = Tag::option(array('value' => ''))->setContent('')->build() . "\n";
}
if (!empty($this->options)) {
if (is_array($this->options)) {
foreach ($this->options as $value => $label) {
$option = Tag::option(array('value' => $value, 'content' => $label));
if ($value === 'NULL' && !isset($this->attributes['value'])) {
$option->setSelected(true);
} else {
if (isset($this->attributes['value']) && self::compareValues($this->attributes['value'], $value)) {
$option->setSelected(true);
}
}
$ret .= $option->build() . "\n";
}
} else {
if (isset($this->attributes['value'])) {
$this->options = preg_replace('%(value=(?:\'|")' . preg_quote($this->attributes['value'], '%') . '(?:\'|"))%is', '$1 selected', $this->options);
}
$ret .= $this->options;
}
}
return $ret;
}
/**
* @param array $options
* @return string
* @throws \Swayok\Html\HtmlTagException
*/
private function buildFieldOptions(array $options)
{
$ret = '';
foreach ($options as $value => $label) {
if (!is_array($label)) {
$ret .= Tag::option()->setContent($label)->setValue($value)->build();
} else {
$ret .= Tag::create()->setName('optgroup')->setAttribute('label', $value)->setContent($this->buildFieldOptions($label))->build();
}
}
return $ret;
}