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<?php // phpcs:ignore WordPress.Files.FileName.InvalidClassFileName /** * The fallback buffer for users with no XML support. * * @since 5.3.0 * @package automattic/jetpack */ /** * A buffer for constructing master sitemap xml files. * * @since 5.1.0 */ abstract class Jetpack_Sitemap_Buffer_Fallback extends Jetpack_Sitemap_Buffer { /** * The buffer contents. * * @access protected * @since 5.3.0 * @var string The buffer contents. */ protected $buffer; /** * Jetpack_Sitemap_Buffer_Fallback constructor. * * @param int $item_limit The maximum size of the buffer in items. * @param int $byte_limit The maximum size of the buffer in bytes. * @param string $time The initial datetime of the buffer. Must be in 'YYYY-MM-DD hh:mm:ss' format. */ public function __construct( $item_limit, $byte_limit, $time = '1970-01-01 00:00:00' ) { $this->is_full_flag = false; $this->is_empty_flag = true; $this->timestamp = $time; $this->finder = new Jetpack_Sitemap_Finder(); $this->item_capacity = max( 1, (int) $item_limit ); $this->byte_capacity = max( 1, (int) $byte_limit ) - strlen( $this->contents() ); } /** * Append an item to the buffer, if there is room for it, * and set is_empty_flag to false. If there is no room, * we set is_full_flag to true. If $item is null, * don't do anything and report success. * * @since 5.3.0 * * @param array $array The item to be added. * * @return bool True if the append succeeded, False if not. */ public function append( $array ) { if ( $array === null ) { return true; } if ( $this->is_full_flag ) { return false; } if ( 0 >= $this->item_capacity || 0 >= $this->byte_capacity ) { $this->is_full_flag = true; return false; } else { $this->item_capacity -= 1; $added_string = $this->array_to_xml_string( $array ); $this->buffer .= $added_string; $this->is_empty_flag = false; mbstring_binary_safe_encoding(); // So we can safely use strlen(). $this->byte_capacity -= strlen( $added_string ); reset_mbstring_encoding(); return true; } } /** * Detect whether the buffer is empty. * * @since 5.3.0 * * @return bool True if the buffer is empty, false otherwise. */ public function is_empty() { return $this->is_empty_flag; } /** * Retrieve the contents of the buffer. * * @since 5.3.0 * * @return string The contents of the buffer (with the footer included). */ public function contents() { $root = $this->get_root_element(); return '<?xml version="1.0" encoding="UTF-8"?>' . PHP_EOL . $root[0] . $this->buffer . $root[1] . PHP_EOL; } /** * Legacy implementation of array to XML conversion without using DOMDocument. * * @param array $array Item to append to buffer. * @param DOMElement $parent (optional) an element to which new children should be added. * @param DOMDocument $root (optional) the parent document. * @return String $result */ public function array_to_xml_string( $array, $parent = null, $root = null ) { // phpcs:ignore VariableAnalysis.CodeAnalysis.VariableAnalysis.UnusedVariable $string = ''; foreach ( $array as $key => $value ) { // Only allow a-z, A-Z, colon, underscore, and hyphen. $tag = preg_replace( '/[^a-zA-Z:_-]/', '_', $key ); if ( is_array( $value ) ) { $string .= "<$tag>"; $string .= $this->array_to_xml_string( $value ); $string .= "</$tag>"; } elseif ( $value === null ) { $string .= "<$tag />"; } else { $string .= "<$tag>" . htmlspecialchars( $value, ENT_COMPAT ) . "</$tag>"; } } return $string; } /** * Render an associative array of XML attribute key/value pairs. * * @access public * @since 5.3.0 * * @param array $array Key/value array of attributes. * * @return string The rendered attribute string. */ public static function array_to_xml_attr_string( $array ) { $string = ''; foreach ( $array as $key => $value ) { $key = preg_replace( '/[^a-zA-Z:_-]/', '_', $key ); $string .= ' ' . $key . '="' . esc_attr( $value ) . '"'; } return $string; } }
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