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| 1 | <?php // phpcs:ignore WordPress.Files.FileName.InvalidClassFileName |
| 2 | /** |
| 3 | * The fallback buffer for users with no XML support. |
| 4 | * |
| 5 | * @since 5.3.0 |
| 6 | * @package automattic/jetpack |
| 7 | */ |
| 8 | |
| 9 | if ( ! defined( 'ABSPATH' ) ) { |
| 10 | exit( 0 ); |
| 11 | } |
| 12 | |
| 13 | /** |
| 14 | * A buffer for constructing master sitemap xml files. |
| 15 | * |
| 16 | * @since 5.1.0 |
| 17 | */ |
| 18 | abstract class Jetpack_Sitemap_Buffer_Fallback extends Jetpack_Sitemap_Buffer { |
| 19 | |
| 20 | /** |
| 21 | * The buffer contents. |
| 22 | * |
| 23 | * @access protected |
| 24 | * @since 5.3.0 |
| 25 | * @var string The buffer contents. |
| 26 | */ |
| 27 | protected $buffer; |
| 28 | |
| 29 | /** |
| 30 | * Jetpack_Sitemap_Buffer_Fallback constructor. |
| 31 | * |
| 32 | * @param int $item_limit The maximum size of the buffer in items. |
| 33 | * @param int $byte_limit The maximum size of the buffer in bytes. |
| 34 | * @param string $time The initial datetime of the buffer. Must be in 'YYYY-MM-DD hh:mm:ss' format. |
| 35 | */ |
| 36 | public function __construct( $item_limit, $byte_limit, $time = '1970-01-01 00:00:00' ) { |
| 37 | $this->is_full_flag = false; |
| 38 | $this->is_empty_flag = true; |
| 39 | $this->timestamp = $time; |
| 40 | |
| 41 | $this->finder = new Jetpack_Sitemap_Finder(); |
| 42 | |
| 43 | $this->item_capacity = max( 1, (int) $item_limit ); |
| 44 | $this->byte_capacity = max( 1, (int) $byte_limit ) - strlen( $this->contents() ); |
| 45 | } |
| 46 | |
| 47 | /** |
| 48 | * Append an item to the buffer, if there is room for it, |
| 49 | * and set is_empty_flag to false. If there is no room, |
| 50 | * we set is_full_flag to true. If $item is null, |
| 51 | * don't do anything and report success. |
| 52 | * |
| 53 | * @since 5.3.0 |
| 54 | * |
| 55 | * @param array $array The item to be added. |
| 56 | * |
| 57 | * @return bool True if the append succeeded, False if not. |
| 58 | */ |
| 59 | public function append( $array ) { |
| 60 | if ( $array === null ) { |
| 61 | return true; |
| 62 | } |
| 63 | |
| 64 | if ( $this->is_full_flag ) { |
| 65 | return false; |
| 66 | } |
| 67 | |
| 68 | if ( 0 >= $this->item_capacity || 0 >= $this->byte_capacity ) { |
| 69 | $this->is_full_flag = true; |
| 70 | return false; |
| 71 | } else { |
| 72 | $this->item_capacity -= 1; |
| 73 | $added_string = $this->array_to_xml_string( $array ); |
| 74 | $this->buffer .= $added_string; |
| 75 | $this->is_empty_flag = false; |
| 76 | |
| 77 | mbstring_binary_safe_encoding(); // So we can safely use strlen(). |
| 78 | $this->byte_capacity -= strlen( $added_string ); |
| 79 | reset_mbstring_encoding(); |
| 80 | |
| 81 | return true; |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | /** |
| 86 | * Detect whether the buffer is empty. |
| 87 | * |
| 88 | * @since 5.3.0 |
| 89 | * |
| 90 | * @return bool True if the buffer is empty, false otherwise. |
| 91 | */ |
| 92 | public function is_empty() { |
| 93 | return $this->is_empty_flag; |
| 94 | } |
| 95 | |
| 96 | /** |
| 97 | * Retrieve the contents of the buffer. |
| 98 | * |
| 99 | * @since 5.3.0 |
| 100 | * |
| 101 | * @return string The contents of the buffer (with the footer included). |
| 102 | */ |
| 103 | public function contents() { |
| 104 | $root = $this->get_root_element(); |
| 105 | |
| 106 | return '<?xml version="1.0" encoding="UTF-8"?>' . PHP_EOL . $root[0] . $this->buffer . $root[1] . PHP_EOL; |
| 107 | } |
| 108 | |
| 109 | /** |
| 110 | * Legacy implementation of array to XML conversion without using DOMDocument. |
| 111 | * |
| 112 | * @param array $array Item to append to buffer. |
| 113 | * @param DOMElement $parent (optional) an element to which new children should be added. |
| 114 | * @param DOMDocument $root (optional) the parent document. |
| 115 | * @return String $result |
| 116 | */ |
| 117 | public function array_to_xml_string( $array, $parent = null, $root = null ) { // phpcs:ignore VariableAnalysis.CodeAnalysis.VariableAnalysis.UnusedVariable |
| 118 | $string = ''; |
| 119 | |
| 120 | foreach ( $array as $key => $value ) { |
| 121 | // Only allow a-z, A-Z, colon, underscore, and hyphen. |
| 122 | $tag = preg_replace( '/[^a-zA-Z:_-]/', '_', $key ); |
| 123 | |
| 124 | if ( is_array( $value ) ) { |
| 125 | $string .= "<$tag>"; |
| 126 | $string .= $this->array_to_xml_string( $value ); |
| 127 | $string .= "</$tag>"; |
| 128 | } elseif ( $value === null ) { |
| 129 | $string .= "<$tag />"; |
| 130 | } else { |
| 131 | $string .= "<$tag>" . htmlspecialchars( $value, ENT_COMPAT ) . "</$tag>"; |
| 132 | } |
| 133 | } |
| 134 | |
| 135 | return $string; |
| 136 | } |
| 137 | |
| 138 | /** |
| 139 | * Render an associative array of XML attribute key/value pairs. |
| 140 | * |
| 141 | * @access public |
| 142 | * @since 5.3.0 |
| 143 | * |
| 144 | * @param array $array Key/value array of attributes. |
| 145 | * |
| 146 | * @return string The rendered attribute string. |
| 147 | */ |
| 148 | public static function array_to_xml_attr_string( $array ) { |
| 149 | $string = ''; |
| 150 | |
| 151 | foreach ( $array as $key => $value ) { |
| 152 | $key = preg_replace( '/[^a-zA-Z:_-]/', '_', $key ); |
| 153 | $string .= ' ' . $key . '="' . esc_attr( $value ) . '"'; |
| 154 | } |
| 155 | |
| 156 | return $string; |
| 157 | } |
| 158 | } |