NodeContent.php

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<?php

 
namespace Depage\XmlDb\Helpers;
 
use Depage\XmlDb\Exceptions\XmlDbException;
use Depage\XmlDb\XmlNs;

class NodeContent
{
    public static function dbIdOf($node, XmlNs $dbNs, string $idAttribute)
    {
        return $node->nodeType == XML_ELEMENT_NODE
            ? $node->getAttributeNS($dbNs->uri, $idAttribute)
            : null;
    }

    public static function fromDomNode($node, XmlNs $dbNs, string $idAttribute): array
    {
        if ($node->nodeType == XML_ELEMENT_NODE) {
            if ($node->prefix != '') {
                $nodeName = $node->prefix . ':' . $node->localName;
            } else {
                $nodeName = $node->localName;
            }
 
            $attributes = [];
            foreach ($node->attributes as $attrib) {
                $attribNs = ($attrib->prefix == '') ? '' : $attrib->prefix . ':';
 
                $attributes[$attribNs . $attrib->localName] = $attrib->value;
            }
 
            return ['ELEMENT_NODE', $nodeName, self::attributeString($attributes, $dbNs, $idAttribute)];
        } elseif ($node->nodeType == XML_TEXT_NODE) {
            return ['TEXT_NODE', null, $node->textContent];
        } elseif ($node->nodeType == XML_COMMENT_NODE) {
            return ['COMMENT_NODE', null, $node->textContent];
        } elseif ($node->nodeType == XML_PI_NODE) {
            return ['PI_NODE', $node->target, $node->textContent];
        } elseif ($node->nodeType == XML_ENTITY_REF_NODE) {
            return ['ENTITY_REF_NODE', null, $node->nodeName];
        }
 
        throw new XmlDbException('Unknown DOM node type: "' . $node->nodeType . '".');
    }

    public static function attributeString(array $attributes, XmlNs $dbNs, string $idAttribute): string
    {
        $attrStr = '';
        $autogeneratedAttr = [
            $dbNs->ns . ':' . $idAttribute,
            $dbNs->ns . ':released',
            $dbNs->ns . ':lastchange',
            $dbNs->ns . ':lastchangeUid',
        ];
        ksort($attributes);
        foreach ($attributes as $name => $value) {
            if (!in_array($name, $autogeneratedAttr)) {
                $attrStr .= "$name=\"" . htmlspecialchars($value) . "\" ";
            }
        }
 
        return $attrStr;
    }

    public static function hash($type, $name, $value, array $childHashes): string
    {
        return hash('sha256', 'v1|' . $type . '|' . $name . '|' . $value . '|' . implode('|', $childHashes));
    }
}
 
/* vim:set ft=php sw=4 sts=4 fdm=marker et : */