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<?php
namespace dokuwiki\Form;
class OptGroup extends Element
{
protected $options = [];
protected $values = [];
/**
* @param string $label The label text for this element (will be autoescaped)
* @param array $options The available options
*/
public function __construct($label, $options)
{
parent::__construct('optGroup', ['label' => $label]);
$this->options($options);
}
/**
* Store the given values so they can be used during rendering
*
* This is intended to be only called from within DropdownElement::val()
*
* @param string[] $values the values to set
* @return string[] the values that have been set (options exist)
* @see DropdownElement::val()
*/
public function storeValues($values)
{
$this->values = [];
foreach ($values as $value) {
if (isset($this->options[$value])) {
$this->values[] = $value;
}
}
return $this->values;
}
/**
* Get or set the options of the optgroup
*
* Options can be given as associative array (value => label) or as an
* indexd array (label = value) or as an array of arrays. In the latter
* case an element has to look as follows:
* option-value => array (
* 'label' => option-label,
* 'attrs' => array (
* attr-key => attr-value, ...
* )
* )
*
* @param null|array $options
* @return $this|array
*/
public function options($options = null)
{
if ($options === null) return $this->options;
if (!is_array($options)) throw new \InvalidArgumentException('Options have to be an array');
$this->options = [];
foreach ($options as $key => $val) {
if (is_array($val)) {
if (!array_key_exists('label', $val)) {
throw new \InvalidArgumentException(
'If option is given as array, it has to have a "label"-key!'
);
}
if (
array_key_exists('attrs', $val) &&
is_array($val['attrs']) &&
array_key_exists('selected', $val['attrs'])
) {
throw new \InvalidArgumentException(
'Please use function "DropdownElement::val()" to set the selected option'
);
}
$this->options[$key] = $val;
} elseif (is_int($key)) {
$this->options[$val] = ['label' => (string)$val];
} else {
$this->options[$key] = ['label' => (string)$val];
}
}
return $this;
}
/**
* The HTML representation of this element
*
* @return string
*/
public function toHTML()
{
if ($this->attributes['label'] === null) {
return $this->renderOptions();
}
$html = '<optgroup ' . buildAttributes($this->attrs()) . '>';
$html .= $this->renderOptions();
$html .= '</optgroup>';
return $html;
}
/**
* @return string
*/
protected function renderOptions()
{
$html = '';
foreach ($this->options as $key => $val) {
$selected = in_array((string)$key, $this->values) ? ' selected="selected"' : '';
$attrs = '';
if (!empty($val['attrs']) && is_array($val['attrs'])) {
$attrs = buildAttributes($val['attrs']);
}
$html .= '<option' . $selected . ' value="' . hsc($key) . '" ' . $attrs . '>';
$html .= hsc($val['label']);
$html .= '</option>';
}
return $html;
}
}
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