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<?php

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/**

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* SimplePie

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* A PHP-Based RSS and Atom Feed Framework.

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

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

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* permitted provided that the following conditions are met:

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

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* conditions and the following disclaimer.

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

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

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* provided with the distribution.

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

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

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* written permission.

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

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

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

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

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

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

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

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

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* POSSIBILITY OF SUCH DAMAGE.

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* @package SimplePie

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* @author Ryan Parman

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* @author Sam Sneddon

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* @author Ryan McCue

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

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

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namespace SimplePie;

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use SimplePie\XML\Declaration\Parser as DeclarationParser;

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/**

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* Parses XML into something sane

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

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* @package SimplePie

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* @subpackage Parsing

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class Parser implements RegistryAware

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{

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public $error_code;

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public $error_string;

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public $current_line;

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public $current_column;

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public $current_byte;

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public $separator = ' ';

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public $namespace = [''];

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public $element = [''];

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public $xml_base = [''];

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public $xml_base_explicit = [false];

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public $xml_lang = [''];

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public $data = [];

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public $datas = [[]];

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public $current_xhtml_construct = -1;

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public $encoding;

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protected $registry;

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

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{

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$this->registry = $registry;

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}

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

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{

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

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$doc = new \DOMDocument();

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@$doc->loadHTML($data);

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$xpath = new \DOMXpath($doc);

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

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

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

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

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

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

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

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}

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}

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

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

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

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} else {

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$this->encoding = $encoding;

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}

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// Strip BOM:

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// UTF-32 Big Endian BOM

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

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$data = substr($data, 4);

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}

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// UTF-32 Little Endian BOM

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

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$data = substr($data, 4);

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}

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// UTF-16 Big Endian BOM

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

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$data = substr($data, 2);

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}

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// UTF-16 Little Endian BOM

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

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$data = substr($data, 2);

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}

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// UTF-8 BOM

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

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$data = substr($data, 3);

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}

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

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

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if ($declaration->parse()) {

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

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

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} else {

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

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return false;

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}

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}

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$return = true;

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static $xml_is_sane = null;

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if ($xml_is_sane === null) {

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$parser_check = xml_parser_create();

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

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xml_parser_free($parser_check);

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

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}

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// Create the parser

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if ($xml_is_sane) {

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

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xml_parser_set_option($xml, XML_OPTION_SKIP_WHITE, 1);

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xml_parser_set_option($xml, XML_OPTION_CASE_FOLDING, 0);

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

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

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// Parse!

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

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

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fwrite($stream, $data) &&

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rewind($stream)) {

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//Parse by chunks not to use too much memory

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do {

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$stream_data = fread($stream, 1048576);

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

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

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

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$return = false;

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break;

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}

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} while (!feof($stream));

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fclose($stream);

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} else {

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$return = false;

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}

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

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

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

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xml_parser_free($xml);

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return $return;

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}

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libxml_clear_errors();

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$xml = new \XMLReader();

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$xml->xml($data);

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

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switch ($xml->nodeType) {

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case constant('XMLReader::END_ELEMENT'):

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

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

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} else {

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$tagName = $xml->localName;

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}

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

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break;

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case constant('XMLReader::ELEMENT'):

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$empty = $xml->isEmptyElement;

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

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

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} else {

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$tagName = $xml->localName;

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}

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$attributes = [];

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while ($xml->moveToNextAttribute()) {

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

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

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} else {

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$attrName = $xml->localName;

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}

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

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}

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

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if ($empty) {

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

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}

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break;

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case constant('XMLReader::TEXT'):

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case constant('XMLReader::CDATA'):

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

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break;

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}

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}

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if ($error = libxml_get_last_error()) {

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

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

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

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

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return false;

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}

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return true;

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}

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public function get_error_code()

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{

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return $this->error_code;

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}

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public function get_error_string()

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{

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return $this->error_string;

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}

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public function get_current_line()

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{

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return $this->current_line;

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}

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public function get_current_column()

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{

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return $this->current_column;

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}

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public function get_current_byte()

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{

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return $this->current_byte;

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}

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public function get_data()

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{

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return $this->data;

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}

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

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{

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

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$attribs = [];

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

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

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

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}

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

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

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if ($base !== false) {

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$this->xml_base[] = $base;

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$this->xml_base_explicit[] = true;

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}

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} else {

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

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

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}

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

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

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} else {

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

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}

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

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$this->current_xhtml_construct++;

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

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

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

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

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

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}

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}

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

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}

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} else {

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

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

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$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)];

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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')

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|| (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')

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

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

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

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$this->current_xhtml_construct = 0;

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}

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}

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}

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public function cdata($parser, $cdata)

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{

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

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

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} else {

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

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}

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}

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public function tag_close($parser, $tag)

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{

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

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$this->current_xhtml_construct--;

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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'])) {

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

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}

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}

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

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

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array_pop($this->datas);

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}

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array_pop($this->element);

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array_pop($this->namespace);

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array_pop($this->xml_base);

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array_pop($this->xml_base_explicit);

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array_pop($this->xml_lang);

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}

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public function split_ns($string)

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{

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static $cache = [];

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

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

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static $separator_length;

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if (!$separator_length) {

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

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}

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

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

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

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$namespace = \SimplePie\SimplePie::NAMESPACE_ITUNES;

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}

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// Normalize the Media RSS namespaces

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

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

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

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

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

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$namespace = \SimplePie\SimplePie::NAMESPACE_MEDIARSS;

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}

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

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} else {

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

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}

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}

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return $cache[$string];

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}

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

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{

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$name = '';

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$link = '';

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

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

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

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

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}

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

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

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if ($name === '') {

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$name = $link;

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} else {

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// can't have commas in categories.

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$name = str_replace(',', '', $name);

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}

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$person_tag = $category ? '<span class="person-tag"></span>' : '';

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return '<a class="h-card" href="'.$link.'">'.$person_tag.$name.'</a>';

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}

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}

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return $data['value'] ?? '';

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}

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private function parse_microformats(&$data, $url)

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{

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$feed_title = '';

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$feed_author = null;

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$author_cache = [];

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$items = [];

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$entries = [];

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$mf = \Mf2\parse($data, $url);

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// First look for an h-feed.

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$h_feed = [];

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foreach ($mf['items'] as $mf_item) {

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if (in_array('h-feed', $mf_item['type'])) {

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$h_feed = $mf_item;

[412] Fix | Delete

break;

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}

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// Also look for h-feed or h-entry in the children of each top level item.

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if (!isset($mf_item['children'][0]['type'])) {

[416] Fix | Delete

continue;

[417] Fix | Delete

}

[418] Fix | Delete

if (in_array('h-feed', $mf_item['children'][0]['type'])) {

[419] Fix | Delete

$h_feed = $mf_item['children'][0];

[420] Fix | Delete

// In this case the parent of the h-feed may be an h-card, so use it as

[421] Fix | Delete

// the feed_author.

[422] Fix | Delete

if (in_array('h-card', $mf_item['type'])) {

[423] Fix | Delete

$feed_author = $mf_item;

[424] Fix | Delete

}

[425] Fix | Delete

break;

[426] Fix | Delete

} elseif (in_array('h-entry', $mf_item['children'][0]['type'])) {

[427] Fix | Delete

$entries = $mf_item['children'];

[428] Fix | Delete

// In this case the parent of the h-entry list may be an h-card, so use

[429] Fix | Delete

// it as the feed_author.

[430] Fix | Delete

if (in_array('h-card', $mf_item['type'])) {

[431] Fix | Delete

$feed_author = $mf_item;

[432] Fix | Delete

}

[433] Fix | Delete

break;

[434] Fix | Delete

}

[435] Fix | Delete

}

[436] Fix | Delete

if (isset($h_feed['children'])) {

[437] Fix | Delete

$entries = $h_feed['children'];

[438] Fix | Delete

// Also set the feed title and store author from the h-feed if available.

[439] Fix | Delete

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

[440] Fix | Delete

$feed_title = $mf['items'][0]['properties']['name'][0];

[441] Fix | Delete

}

[442] Fix | Delete

if (isset($mf['items'][0]['properties']['author'][0])) {

[443] Fix | Delete

$feed_author = $mf['items'][0]['properties']['author'][0];

[444] Fix | Delete

}

[445] Fix | Delete

} elseif (count($entries) === 0) {

[446] Fix | Delete

$entries = $mf['items'];

[447] Fix | Delete

}

[448] Fix | Delete

for ($i = 0; $i < count($entries); $i++) {

[449] Fix | Delete

$entry = $entries[$i];

[450] Fix | Delete

if (in_array('h-entry', $entry['type'])) {

[451] Fix | Delete

$item = [];

[452] Fix | Delete

$title = '';

[453] Fix | Delete

$description = '';

[454] Fix | Delete

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

[455] Fix | Delete

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

[456] Fix | Delete

if (isset($link['value'])) {

[457] Fix | Delete

$link = $link['value'];

[458] Fix | Delete

}

[459] Fix | Delete

$item['link'] = [['data' => $link]];

[460] Fix | Delete

}

[461] Fix | Delete

if (isset($entry['properties']['uid'][0])) {

[462] Fix | Delete

$guid = $entry['properties']['uid'][0];

[463] Fix | Delete

if (isset($guid['value'])) {

[464] Fix | Delete

$guid = $guid['value'];

[465] Fix | Delete

}

[466] Fix | Delete

$item['guid'] = [['data' => $guid]];

[467] Fix | Delete

}

[468] Fix | Delete

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

[469] Fix | Delete

$title = $entry['properties']['name'][0];

[470] Fix | Delete

if (isset($title['value'])) {

[471] Fix | Delete

$title = $title['value'];

[472] Fix | Delete

}

[473] Fix | Delete

$item['title'] = [['data' => $title]];

[474] Fix | Delete

}

[475] Fix | Delete

if (isset($entry['properties']['author'][0]) || isset($feed_author)) {

[476] Fix | Delete

// author is a special case, it can be plain text or an h-card array.

[477] Fix | Delete

// If it's plain text it can also be a url that should be followed to

[478] Fix | Delete

// get the actual h-card.

[479] Fix | Delete

$author = $entry['properties']['author'][0] ?? $feed_author;

[480] Fix | Delete

if (!is_string($author)) {

[481] Fix | Delete

$author = $this->parse_hcard($author);

[482] Fix | Delete

} elseif (strpos($author, 'http') === 0) {

[483] Fix | Delete

if (isset($author_cache[$author])) {

[484] Fix | Delete

$author = $author_cache[$author];

[485] Fix | Delete

} else {

[486] Fix | Delete

$mf = \Mf2\fetch($author);

[487] Fix | Delete

foreach ($mf['items'] as $hcard) {

[488] Fix | Delete

// Only interested in an h-card by itself in this case.

[489] Fix | Delete

if (!in_array('h-card', $hcard['type'])) {

[490] Fix | Delete

continue;

[491] Fix | Delete

}

[492] Fix | Delete

// It must have a url property matching what we fetched.

[493] Fix | Delete

if (!isset($hcard['properties']['url']) ||

[494] Fix | Delete

!(in_array($author, $hcard['properties']['url']))) {

[495] Fix | Delete

continue;

[496] Fix | Delete

}

[497] Fix | Delete

// Save parse_hcard the trouble of finding the correct url.

[498] Fix | Delete

$hcard['properties']['url'][0] = $author;

[499] Fix | Delete