<?php // phpcs:ignore WordPress.Files.FileName.InvalidClassFileName

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/**

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* XMLWriter implementation of the image sitemap buffer.

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*

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* @since 14.6

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* @package automattic/jetpack

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*/

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if ( ! defined( 'ABSPATH' ) ) {

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exit( 0 );

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}

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/**

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* A buffer for constructing sitemap image xml files using XMLWriter.

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*

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* @since 14.6

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*/

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class Jetpack_Sitemap_Buffer_Image_XMLWriter extends Jetpack_Sitemap_Buffer_XMLWriter {

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/**

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* Initialize the buffer with required headers (no root element here).

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*/

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protected function initialize_buffer() {

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// Add generator comment

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$this->writer->writeComment( "generator='jetpack-" . JETPACK__VERSION . "'" );

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$this->writer->writeComment( 'Jetpack_Sitemap_Buffer_Image_XMLWriter' );

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// Add stylesheet

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$this->writer->writePi(

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'xml-stylesheet',

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'type="text/xsl" href="' . $this->finder->construct_sitemap_url( 'image-sitemap.xsl' ) . '"'

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);

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}

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/**

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* Start the root element and write its namespaces.

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*/

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protected function start_root() {

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$this->writer->startElement( 'urlset' );

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/**

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* Filter the XML namespaces included in image sitemaps.

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*

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* @module sitemaps

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*

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* @since 4.8.0

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*

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* @param array $namespaces Associative array with namespaces and namespace URIs.

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*/

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$namespaces = apply_filters(

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'jetpack_sitemap_image_ns',

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array(

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'xmlns:xsi' => 'http://www.w3.org/2001/XMLSchema-instance',

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'xsi:schemaLocation' => 'http://www.sitemaps.org/schemas/sitemap/0.9 http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd',

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'xmlns' => 'http://www.sitemaps.org/schemas/sitemap/0.9',

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'xmlns:image' => 'http://www.google.com/schemas/sitemap-image/1.1',

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)

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);

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

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$this->writer->writeAttribute( $name, $value );

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}

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}

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/**

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* Append a URL entry with image information to the sitemap.

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*

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* @param array $array The URL item to append.

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*/

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protected function append_item( $array ) {

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if ( ! isset( $array['url'] ) || ! is_array( $array['url'] ) ) {

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return;

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}

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if ( isset( $array['url']['image:image'] ) ) {

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if ( empty( $array['url']['image:image']['image:title'] ) ) {

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unset( $array['url']['image:image']['image:title'] );

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}

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if ( empty( $array['url']['image:image']['image:caption'] ) ) {

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unset( $array['url']['image:image']['image:caption'] );

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}

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}

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$this->array_to_xml( $array );

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}

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}

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