<?php

/**

 * SimplePie

 *

 * A PHP-Based RSS and Atom Feed Framework.

 * Takes the hard work out of managing a complete RSS/Atom solution.

 *

 * Copyright (c) 2004-2022, Ryan Parman, Sam Sneddon, Ryan McCue, and contributors

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without modification, are

 * permitted provided that the following conditions are met:

 *

 * 	* Redistributions of source code must retain the above copyright notice, this list of

 * 	  conditions and the following disclaimer.

 *

 * 	* Redistributions in binary form must reproduce the above copyright notice, this list

 * 	  of conditions and the following disclaimer in the documentation and/or other materials

 * 	  provided with the distribution.

 *

 * 	* Neither the name of the SimplePie Team nor the names of its contributors may be used

 * 	  to endorse or promote products derived from this software without specific prior

 * 	  written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS

 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY

 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS

 * AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR

 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR

 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

 * POSSIBILITY OF SUCH DAMAGE.

 *

 * @package SimplePie

 * @copyright 2004-2016 Ryan Parman, Sam Sneddon, Ryan McCue

 * @author Ryan Parman

 * @author Sam Sneddon

 * @author Ryan McCue

 * @link http://simplepie.org/ SimplePie

 * @license http://www.opensource.org/licenses/bsd-license.php BSD License

 */

namespace SimplePie;

use SimplePie\XML\Declaration\Parser as DeclarationParser;

/**

 * Parses XML into something sane

 *

 *

 * This class can be overloaded with {@see \SimplePie\SimplePie::set_parser_class()}

 *

 * @package SimplePie

 * @subpackage Parsing

 */

class Parser implements RegistryAware

{

    public $error_code;

    public $error_string;

    public $current_line;

    public $current_column;

    public $current_byte;

    public $separator = ' ';

    public $namespace = [''];

    public $element = [''];

    public $xml_base = [''];

    public $xml_base_explicit = [false];

    public $xml_lang = [''];

    public $data = [];

    public $datas = [[]];

    public $current_xhtml_construct = -1;

    public $encoding;

    protected $registry;

    public function set_registry(\SimplePie\Registry $registry)/* : void */

    {

        $this->registry = $registry;

    }

    public function parse(&$data, $encoding, $url = '')

    {

        if (class_exists('DOMXpath') && function_exists('Mf2\parse')) {

            $doc = new \DOMDocument();

            @$doc->loadHTML($data);

            $xpath = new \DOMXpath($doc);

            // Check for both h-feed and h-entry, as both a feed with no entries

            // and a list of entries without an h-feed wrapper are both valid.

            $query = '//*[contains(concat(" ", @class, " "), " h-feed ") or '.

                'contains(concat(" ", @class, " "), " h-entry ")]';

            $result = $xpath->query($query);

            if ($result->length !== 0) {

                return $this->parse_microformats($data, $url);

            }

        }

        // Use UTF-8 if we get passed US-ASCII, as every US-ASCII character is a UTF-8 character

        if (strtoupper($encoding) === 'US-ASCII') {

            $this->encoding = 'UTF-8';

        } else {

            $this->encoding = $encoding;

        }

        // Strip BOM:

        // UTF-32 Big Endian BOM

        if (substr($data, 0, 4) === "\x00\x00\xFE\xFF") {

            $data = substr($data, 4);

        }

        // UTF-32 Little Endian BOM

        elseif (substr($data, 0, 4) === "\xFF\xFE\x00\x00") {

            $data = substr($data, 4);

        }

        // UTF-16 Big Endian BOM

        elseif (substr($data, 0, 2) === "\xFE\xFF") {

            $data = substr($data, 2);

        }

        // UTF-16 Little Endian BOM

        elseif (substr($data, 0, 2) === "\xFF\xFE") {

            $data = substr($data, 2);

        }

        // UTF-8 BOM

        elseif (substr($data, 0, 3) === "\xEF\xBB\xBF") {

            $data = substr($data, 3);

        }

        if (substr($data, 0, 5) === '<?xml' && strspn(substr($data, 5, 1), "\x09\x0A\x0D\x20") && ($pos = strpos($data, '?>')) !== false) {

            $declaration = $this->registry->create(DeclarationParser::class, [substr($data, 5, $pos - 5)]);

            if ($declaration->parse()) {

                $data = substr($data, $pos + 2);

                $data = '<?xml version="' . $declaration->version . '" encoding="' . $encoding . '" standalone="' . (($declaration->standalone) ? 'yes' : 'no') . '"?>' ."\n". $this->declare_html_entities() . $data;

            } else {

                $this->error_string = 'SimplePie bug! Please report this!';

                return false;

            }

        }

        $return = true;

        static $xml_is_sane = null;

        if ($xml_is_sane === null) {

            $parser_check = xml_parser_create();

            xml_parse_into_struct($parser_check, '<foo>&amp;</foo>', $values);

            xml_parser_free($parser_check);

            $xml_is_sane = isset($values[0]['value']);

        }

        // Create the parser

        if ($xml_is_sane) {

            $xml = xml_parser_create_ns($this->encoding, $this->separator);

            xml_parser_set_option($xml, XML_OPTION_SKIP_WHITE, 1);

            xml_parser_set_option($xml, XML_OPTION_CASE_FOLDING, 0);

            xml_set_character_data_handler($xml, [$this, 'cdata']);

            xml_set_element_handler($xml, [$this, 'tag_open'], [$this, 'tag_close']);

            // Parse!

            $wrapper = @is_writable(sys_get_temp_dir()) ? 'php://temp' : 'php://memory';

            if (($stream = fopen($wrapper, 'r+')) &&

                fwrite($stream, $data) &&

                rewind($stream)) {

                //Parse by chunks not to use too much memory

                do {

                    $stream_data = fread($stream, 1048576);

                    if (!xml_parse($xml, $stream_data === false ? '' : $stream_data, feof($stream))) {

                        $this->error_code = xml_get_error_code($xml);

                        $this->error_string = xml_error_string($this->error_code);

                        $return = false;

                        break;

                    }

                } while (!feof($stream));

                fclose($stream);

            } else {

                $return = false;

            }

            $this->current_line = xml_get_current_line_number($xml);

            $this->current_column = xml_get_current_column_number($xml);

            $this->current_byte = xml_get_current_byte_index($xml);

            xml_parser_free($xml);

            return $return;

        }

        libxml_clear_errors();

        $xml = new \XMLReader();

        $xml->xml($data);

        while (@$xml->read()) {

            switch ($xml->nodeType) {

                case constant('XMLReader::END_ELEMENT'):

                    if ($xml->namespaceURI !== '') {

                        $tagName = $xml->namespaceURI . $this->separator . $xml->localName;

                    } else {

                        $tagName = $xml->localName;

                    }

                    $this->tag_close(null, $tagName);

                    break;

                case constant('XMLReader::ELEMENT'):

                    $empty = $xml->isEmptyElement;

                    if ($xml->namespaceURI !== '') {

                        $tagName = $xml->namespaceURI . $this->separator . $xml->localName;

                    } else {

                        $tagName = $xml->localName;

                    }

                    $attributes = [];

                    while ($xml->moveToNextAttribute()) {

                        if ($xml->namespaceURI !== '') {

                            $attrName = $xml->namespaceURI . $this->separator . $xml->localName;

                        } else {

                            $attrName = $xml->localName;

                        }

                        $attributes[$attrName] = $xml->value;

                    }

                    $this->tag_open(null, $tagName, $attributes);

                    if ($empty) {

                        $this->tag_close(null, $tagName);

                    }

                    break;

                case constant('XMLReader::TEXT'):

                case constant('XMLReader::CDATA'):

                    $this->cdata(null, $xml->value);

                    break;

            }

        }

        if ($error = libxml_get_last_error()) {

            $this->error_code = $error->code;

            $this->error_string = $error->message;

            $this->current_line = $error->line;

            $this->current_column = $error->column;

            return false;

        }

        return true;

    }

    public function get_error_code()

    {

        return $this->error_code;

    }

    public function get_error_string()

    {

        return $this->error_string;

    }

    public function get_current_line()

    {

        return $this->current_line;

    }

    public function get_current_column()

    {

        return $this->current_column;

    }

    public function get_current_byte()

    {

        return $this->current_byte;

    }

    public function get_data()

    {

        return $this->data;

    }

    public function tag_open($parser, $tag, $attributes)

    {

        [$this->namespace[], $this->element[]] = $this->split_ns($tag);

        $attribs = [];

        foreach ($attributes as $name => $value) {

            [$attrib_namespace, $attribute] = $this->split_ns($name);

            $attribs[$attrib_namespace][$attribute] = $value;

        }

        if (isset($attribs[\SimplePie\SimplePie::NAMESPACE_XML]['base'])) {

            $base = $this->registry->call(Misc::class, 'absolutize_url', [$attribs[\SimplePie\SimplePie::NAMESPACE_XML]['base'], end($this->xml_base)]);

            if ($base !== false) {

                $this->xml_base[] = $base;

                $this->xml_base_explicit[] = true;

            }

        } else {

            $this->xml_base[] = end($this->xml_base);

            $this->xml_base_explicit[] = end($this->xml_base_explicit);

        }

        if (isset($attribs[\SimplePie\SimplePie::NAMESPACE_XML]['lang'])) {

            $this->xml_lang[] = $attribs[\SimplePie\SimplePie::NAMESPACE_XML]['lang'];

        } else {

            $this->xml_lang[] = end($this->xml_lang);

        }

        if ($this->current_xhtml_construct >= 0) {

            $this->current_xhtml_construct++;

            if (end($this->namespace) === \SimplePie\SimplePie::NAMESPACE_XHTML) {

                $this->data['data'] .= '<' . end($this->element);

                if (isset($attribs[''])) {

                    foreach ($attribs[''] as $name => $value) {

                        $this->data['data'] .= ' ' . $name . '="' . htmlspecialchars($value, ENT_COMPAT, $this->encoding) . '"';

                    }

                }

                $this->data['data'] .= '>';

            }

        } else {

            $this->datas[] = &$this->data;

            $this->data = &$this->data['child'][end($this->namespace)][end($this->element)][];

            $this->data = ['data' => '', 'attribs' => $attribs, 'xml_base' => end($this->xml_base), 'xml_base_explicit' => end($this->xml_base_explicit), 'xml_lang' => end($this->xml_lang)];

            if ((end($this->namespace) === \SimplePie\SimplePie::NAMESPACE_ATOM_03 && in_array(end($this->element), ['title', 'tagline', 'copyright', 'info', 'summary', 'content']) && isset($attribs['']['mode']) && $attribs['']['mode'] === 'xml')

            || (end($this->namespace) === \SimplePie\SimplePie::NAMESPACE_ATOM_10 && in_array(end($this->element), ['rights', 'subtitle', 'summary', 'info', 'title', 'content']) && isset($attribs['']['type']) && $attribs['']['type'] === 'xhtml')

            || (end($this->namespace) === \SimplePie\SimplePie::NAMESPACE_RSS_20 && in_array(end($this->element), ['title']))

            || (end($this->namespace) === \SimplePie\SimplePie::NAMESPACE_RSS_090 && in_array(end($this->element), ['title']))

            || (end($this->namespace) === \SimplePie\SimplePie::NAMESPACE_RSS_10 && in_array(end($this->element), ['title']))) {

                $this->current_xhtml_construct = 0;

            }

        }

    }

    public function cdata($parser, $cdata)

    {

        if ($this->current_xhtml_construct >= 0) {

            $this->data['data'] .= htmlspecialchars($cdata, ENT_QUOTES, $this->encoding);

        } else {

            $this->data['data'] .= $cdata;

        }

    }

    public function tag_close($parser, $tag)

    {

        if ($this->current_xhtml_construct >= 0) {

            $this->current_xhtml_construct--;

            if (end($this->namespace) === \SimplePie\SimplePie::NAMESPACE_XHTML && !in_array(end($this->element), ['area', 'base', 'basefont', 'br', 'col', 'frame', 'hr', 'img', 'input', 'isindex', 'link', 'meta', 'param'])) {

                $this->data['data'] .= '</' . end($this->element) . '>';

            }

        }

        if ($this->current_xhtml_construct === -1) {

            $this->data = &$this->datas[count($this->datas) - 1];

            array_pop($this->datas);

        }

        array_pop($this->element);

        array_pop($this->namespace);

        array_pop($this->xml_base);

        array_pop($this->xml_base_explicit);

        array_pop($this->xml_lang);

    }

    public function split_ns($string)

    {

        static $cache = [];

        if (!isset($cache[$string])) {

            if ($pos = strpos($string, $this->separator)) {

                static $separator_length;

                if (!$separator_length) {

                    $separator_length = strlen($this->separator);

                }

                $namespace = substr($string, 0, $pos);

                $local_name = substr($string, $pos + $separator_length);

                if (strtolower($namespace) === \SimplePie\SimplePie::NAMESPACE_ITUNES) {

                    $namespace = \SimplePie\SimplePie::NAMESPACE_ITUNES;

                }

                // Normalize the Media RSS namespaces

                if ($namespace === \SimplePie\SimplePie::NAMESPACE_MEDIARSS_WRONG ||

                    $namespace === \SimplePie\SimplePie::NAMESPACE_MEDIARSS_WRONG2 ||

                    $namespace === \SimplePie\SimplePie::NAMESPACE_MEDIARSS_WRONG3 ||

                    $namespace === \SimplePie\SimplePie::NAMESPACE_MEDIARSS_WRONG4 ||

                    $namespace === \SimplePie\SimplePie::NAMESPACE_MEDIARSS_WRONG5) {

                    $namespace = \SimplePie\SimplePie::NAMESPACE_MEDIARSS;

                }

                $cache[$string] = [$namespace, $local_name];

            } else {

                $cache[$string] = ['', $string];

            }

        }

        return $cache[$string];

    }

    private function parse_hcard($data, $category = false)

    {

        $name = '';

        $link = '';

        // Check if h-card is set and pass that information on in the link.

        if (isset($data['type']) && in_array('h-card', $data['type'])) {

            if (isset($data['properties']['name'][0])) {

                $name = $data['properties']['name'][0];

            }

            if (isset($data['properties']['url'][0])) {

                $link = $data['properties']['url'][0];

                if ($name === '') {