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<?php
namespace dokuwiki\Form;
class OptGroup extends Element {
protected $options = array();
protected $value;
/**
* @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', array('label' => $label));
$this->options($options);
}
/**
* Store the given value so it can be used during rendering
*
* This is intended to be only called from within @see DropdownElement::val()
*
* @param string $value
* @return bool true if an option with the given value exists, false otherwise
*/
public function storeValue($value) {
$this->value = $value;
return isset($this->options[$value]);
}
/**
* 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');
$this->options = array();
foreach($options as $key => $val) {
if (is_array($val)) {
if (!key_exists('label', $val)) throw new \InvalidArgumentException(
'If option is given as array, it has to have a "label"-key!'
);
if (key_exists('attrs', $val) && is_array($val['attrs']) && 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] = array('label' => (string) $val);
} else {
$this->options[$key] = array('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) {
$selected = ((string)$key === (string)$this->value) ? ' 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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