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<?php
namespace Drupal\yamlform\Element;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Render\Element\FormElement;
class YamlFormLikert extends FormElement {
public function getInfo() {
$class = get_class($this);
return [
'#input' => TRUE,
'#process' => [
[
$class,
'processYamlFormLikert',
],
[
$class,
'processAjaxForm',
],
],
'#theme_wrappers' => [
'form_element',
],
'#required' => FALSE,
'#questions' => [],
'#answers' => [],
'#na_answer' => FALSE,
'#na_answer_text' => '',
'#na_answer_value' => '',
];
}
public static function processYamlFormLikert(&$element, FormStateInterface $form_state, &$complete_form) {
self::processYamlFormLikertAnswers($element);
$header = [
'likert_question' => [
'question' => FALSE,
],
] + $element['#answers'];
if (!empty($element['#questions_randomize'])) {
shuffle($element['#questions']);
}
$rows = [];
foreach ($element['#questions'] as $question_key => $question_title) {
$value = isset($element['#value'][$question_key]) ? $element['#value'][$question_key] : NULL;
$row = [];
$row['likert_question'] = [
'#type' => 'item',
'#title' => $question_title,
'#value' => '<span></span>',
'#required' => $element['#required'],
];
foreach ($element['#answers'] as $answer_key => $answer_title) {
$row[$answer_key] = [
'#parents' => [
$element['#name'],
$question_key,
],
'#type' => 'radio',
'#title' => $answer_title,
'#title_display' => 'after',
'#return_value' => (string) $answer_key,
'#value' => (string) $value,
];
}
$rows[$question_key] = $row;
}
$element['table'] = [
'#type' => 'table',
'#header' => $header,
'#attributes' => [
'class' => [
'yamlform-likert-table',
],
'data-likert-answers-count' => count($element['#answers']),
],
] + $rows;
$properties = [
'#states',
'#sticky',
];
$element['table'] += array_intersect_key($element, array_combine($properties, $properties));
$element['#tree'] = TRUE;
$element['#element_validate'] = [
[
get_called_class(),
'validateYamlFormLikert',
],
];
$element['#attached']['library'][] = 'yamlform/yamlform.element.likert';
return $element;
}
public static function processYamlFormLikertAnswers(array &$element) {
if (empty($element['#na_answer']) || empty($element['#answers'])) {
return;
}
$na_value = !empty($element['#na_answer_value']) ? $element['#na_answer_value'] : (string) t('N/A');
$na_text = !empty($element['#na_answer_text']) ? $element['#na_answer_text'] : $na_value;
$element['#answers'] += [
$na_value => $na_text,
];
}
public static function valueCallback(&$element, $input, FormStateInterface $form_state) {
$default_value = [];
foreach ($element['#questions'] as $question_key => $question_title) {
$default_value[$question_key] = NULL;
}
if ($input === FALSE) {
$element += [
'#default_value' => [],
];
return $element['#default_value'] + $default_value;
}
$value = $default_value;
foreach ($value as $allowed_key => $default) {
if (isset($input[$allowed_key]) && is_scalar($input[$allowed_key])) {
$value[$allowed_key] = (string) $input[$allowed_key];
}
}
return $value;
}
public static function validateYamlFormLikert(&$element, FormStateInterface $form_state, &$complete_form) {
$value = $element['#value'];
if (!empty($element['#required'])) {
foreach ($element['#questions'] as $question_key => $question_title) {
if (empty($value[$question_key])) {
$form_state
->setError($element['table'][$question_key]['likert_question'], t('@name field is required.', [
'@name' => $question_title,
]));
}
}
}
$form_state
->setValueForElement($element, $value);
}
}