<?php
/**
* Definition for <time> element contents
*
* As a side effect for child validation it ensures that 'datetime' attribute
* is present if text content of the children is not a valid datetime string.
*
* @see https://html.spec.whatwg.org/multipage/text-level-semantics.html#the-time-element
*/
class HTMLPurifier_ChildDef_HTML5_Time extends HTMLPurifier_ChildDef_HTML5_Abstract
{
public $type = 'time';
public $allow_empty = true;
public $elements = array(
'Inline' => true,
);
/**
* @param HTMLPurifier_Node[] $children
* @param HTMLPurifier_Config $config
* @param HTMLPurifier_Context $context
* @return bool|HTMLPurifier_Node[]
*/
public function validateChildren($children, $config, $context)
{
$currentNode = $context->get('CurrentNode', true);
if ($currentNode instanceof HTMLPurifier_Node_Element) {
// Unfortunately at this point invalid 'datetime' attribute is not
// yet removed, so we need to validate it here
/** @var HTMLPurifier_AttrDef $attr */
$attr = $config->getHTMLDefinition()->info['time']->attr['datetime'];
$datetime = isset($currentNode->attr['datetime'])
? $attr->validate($currentNode->attr['datetime'], $config, $context)
: false;
// If datetime attribute is invalid, we need to check whether element's
// contents are a valid datetime string. If not, add a dummy datetime
// attribute with UNIX epoch date, to satisfy the spec requirements.
// This can't be done in the AttrTransform step, because CurrentNode is
// not available there.
if ($datetime === false) {
$textContent = '';
foreach ($currentNode->children as $child) {
if ($child instanceof HTMLPurifier_Node_Element) {
$textContent = '';
break;
} elseif ($child instanceof HTMLPurifier_Node_Text) {
$textContent .= $child->data;
}
}
if (!$attr->validate($textContent, $config, $context)) {
$currentNode->attr['datetime'] = '1970-01-01';
}
}
}
return $children;
}
}