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Current File : /home/utripoli/public_html/alqalam/lib/pkp/classes/xml/XMLNode.php
<?php

/**
 * @file classes/xml/XMLNode.php
 *
 * Copyright (c) 2014-2021 Simon Fraser University
 * Copyright (c) 2000-2021 John Willinsky
 * Distributed under the GNU GPL v3. For full terms see the file docs/COPYING.
 *
 * @class XMLNode
 *
 * @ingroup xml
 *
 * @brief Default handler for PKPXMLParser returning a simple DOM-style object.
 * This handler parses an XML document into a tree structure of XMLNode objects.
 */

namespace PKP\xml;

class XMLNode
{
    /** @var string the element (tag) name */
    public $name;

    /** @var XMLNode reference to the parent node (null if this is the root node) */
    public $parent;

    /** @var array the element's attributes */
    public $attributes;

    /** @var string the element's value */
    public $value;

    /** @var array references to the XMLNode children of this node */
    public $children;

    /**
     * Constructor.
     *
     * @param string $name element/tag name
     */
    public function __construct($name = null)
    {
        $this->name = $name;
        $this->parent = null;
        $this->attributes = [];
        $this->value = null;
        $this->children = [];
    }

    /**
     * @param bool $includeNamespace
     *
     * @return string
     */
    public function getName($includeNamespace = true)
    {
        if (
            $includeNamespace ||
            ($i = strpos($this->name, ':')) === false
        ) {
            return $this->name;
        }
        return substr($this->name, $i + 1);
    }

    /**
     * @param string $name
     */
    public function setName($name)
    {
        $this->name = $name;
    }

    /**
     * @return XMLNode
     */
    public function &getParent()
    {
        return $this->parent;
    }

    /**
     * @param XMLNode $parent
     */
    public function setParent(&$parent)
    {
        $this->parent = & $parent;
    }

    /**
     * @return array all attributes
     */
    public function getAttributes()
    {
        return $this->attributes;
    }

    /**
     * @param string $name attribute name
     *
     * @return string attribute value
     */
    public function getAttribute($name)
    {
        return $this->attributes[$name] ?? null;
    }

    /**
     * @param string $name attribute name
     * @param string $value attribute value
     */
    public function setAttribute($name, $value)
    {
        $this->attributes[$name] = $value;
    }

    /**
     * @param array $attributes
     */
    public function setAttributes($attributes)
    {
        $this->attributes = $attributes;
    }

    /**
     * @return string
     */
    public function &getValue()
    {
        return $this->value;
    }

    /**
     * @param string $value
     */
    public function setValue($value)
    {
        $this->value = & $value;
    }

    /**
     * @return array this node's children (XMLNode objects)
     */
    public function &getChildren()
    {
        return $this->children;
    }

    /**
     * @param string $name
     * @param int $index
     *
     * @return ?XMLNode the ($index+1)th child matching the specified name
     */
    public function &getChildByName($name, $index = 0)
    {
        if (!is_array($name)) {
            $name = [$name];
        }
        foreach ($this->children as $key => $junk) {
            $child = & $this->children[$key];
            if (in_array($child->getName(), $name)) {
                if ($index == 0) {
                    return $child;
                } else {
                    $index--;
                }
            }
            unset($child);
        }
        $child = null;
        return $child;
    }

    /**
     * Get the value of a child node.
     *
     * @param string $name name of node
     * @param int $index Optional index of child node to find
     */
    public function &getChildValue($name, $index = 0)
    {
        $node = & $this->getChildByName($name);
        if ($node) {
            $returner = & $node->getValue();
        } else {
            $returner = null;
        }
        return $returner;
    }

    /**
     * @param XMLNode $node the child node to add
     */
    public function addChild(&$node)
    {
        $this->children[] = & $node;
    }

    /**
     * @param resource $output file handle to write to, or true for stdout, or null if XML to be returned as string
     *
     * @return string
     */
    public function &toXml($output = null)
    {
        $nullVar = null;
        $out = '';

        if ($this->parent === null) {
            // This is the root node. Output information about the document.
            $out .= '<?xml version="' . $this->getAttribute('version') . "\" encoding=\"UTF-8\"?>\n";
            if ($this->getAttribute('type') != '') {
                if ($this->getAttribute('url') != '') {
                    $out .= '<!DOCTYPE ' . $this->getAttribute('type') . ' PUBLIC "' . $this->getAttribute('dtd') . '" "' . $this->getAttribute('url') . '">';
                } else {
                    $out .= '<!DOCTYPE ' . $this->getAttribute('type') . ' SYSTEM "' . $this->getAttribute('dtd') . '">';
                }
            }
        }

        if ($this->name !== null) {
            $out .= '<' . $this->name;
            foreach ($this->attributes as $name => $value) {
                $value = XMLNode::xmlentities($value);
                $out .= " {$name}=\"{$value}\"";
            }
            if ($this->name !== '!--') {
                $out .= '>';
            }
        }
        $out .= XMLNode::xmlentities($this->value, ENT_NOQUOTES);
        foreach ($this->children as $child) {
            if ($output !== null) {
                if ($output === true) {
                    echo $out;
                } else {
                    fwrite($output, $out);
                }
                $out = '';
            }
            $out .= $child->toXml($output);
        }
        if ($this->name === '!--') {
            $out .= '-->';
        } elseif ($this->name !== null) {
            $out .= '</' . $this->name . '>';
        }
        if ($output !== null) {
            if ($output === true) {
                echo $out;
            } else {
                fwrite($output, $out);
            }
            return $nullVar;
        }
        return $out;
    }

    public static function xmlentities($string, $quote_style = ENT_QUOTES)
    {
        return htmlspecialchars($string, $quote_style, 'UTF-8');
    }

    public function destroy()
    {
        unset($this->value, $this->attributes, $this->parent, $this->name);
        foreach ($this->children as $child) {
            $child->destroy();
        }
        unset($this->children);
    }
}

if (!PKP_STRICT_MODE) {
    class_alias('\PKP\xml\XMLNode', '\XMLNode');
}

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