<?php

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/**

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* Plugin Name: Site Breadcrumbs

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* Plugin URI: https://wordpress.com

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* Description: Quickly add breadcrumbs to the single view of a hierarchical post type or a hierarchical taxonomy.

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* Author: Automattic

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* Version: 1.0

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* Author URI: https://wordpress.com

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* License: GPL2 or later

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* Text Domain: jetpack

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*

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* @package automattic/jetpack

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*/

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if ( ! class_exists( '\Automattic\Jetpack\Classic_Theme_Helper\Main' ) ) {

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if ( ! function_exists( 'jetpack_breadcrumbs' ) ) {

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/**

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* Echos a set of breadcrumbs.

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*

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* Themes can call this function where the breadcrumbs should be outputted.

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*

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* @phan-suppress PhanRedefineFunction -- Covered by function_exists check.

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*/

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function jetpack_breadcrumbs() {

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_deprecated_function( __FUNCTION__, 'jetpack-13.8' );

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$taxonomy = is_category() ? 'category' : get_query_var( 'taxonomy' );

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$is_taxonomy_hierarchical = is_taxonomy_hierarchical( $taxonomy );

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$post_type = is_page() ? 'page' : get_query_var( 'post_type' );

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$is_post_type_hierarchical = is_post_type_hierarchical( $post_type );

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if ( ! ( $is_post_type_hierarchical || $is_taxonomy_hierarchical ) || is_front_page() ) {

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return;

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}

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$breadcrumb = '';

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$position = 1;

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if ( $is_post_type_hierarchical ) {

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$post_id = get_queried_object_id();

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$ancestors = array_reverse( get_post_ancestors( $post_id ) );

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if ( $ancestors ) {

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foreach ( $ancestors as $ancestor ) {

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$breadcrumb .= '<span itemprop="itemListElement" itemscope itemtype="https://schema.org/ListItem"><meta itemprop="position" content="' . esc_attr( $position ) . '"><a href="' . esc_url( get_permalink( $ancestor ) ) . '" itemprop="item"><span itemprop="name">' . esc_html( get_the_title( $ancestor ) ) . '</span></a></span>';

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++$position;

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}

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}

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$breadcrumb .= '<span class="current-page" itemprop="itemListElement" itemscope itemtype="https://schema.org/ListItem"><meta itemprop="position" content="' . esc_attr( $position ) . '"><span itemprop="name">' . esc_html( get_the_title( $post_id ) ) . '</span></span>';

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} elseif ( $is_taxonomy_hierarchical ) {

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$current = get_term( get_queried_object_id(), $taxonomy );

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if ( is_wp_error( $current ) ) {

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return;

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}

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if ( $current->parent ) {

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$breadcrumb = jetpack_get_term_parents( $current->parent, $taxonomy );

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}

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$breadcrumb .= '<span class="current-category" itemprop="itemListElement" itemscope itemtype="https://schema.org/ListItem"><meta property="position" content="' . esc_attr( $position ) . '"><span itemprop="name">' . esc_html( $current->name ) . '</span></span>';

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}

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$home = '<span itemprop="itemListElement" itemscope itemtype="https://schema.org/ListItem"><meta itemprop="position" content="' . esc_attr( $position ) . '"><meta itemprop="position" content="0"><a href="' . esc_url( home_url( '/' ) ) . '" class="home-link" itemprop="item" rel="home"><span itemprop="name">' . esc_html__( 'Home', 'jetpack' ) . '</span></a></span>';

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echo '<nav class="entry-breadcrumbs" itemscope itemtype="https://schema.org/BreadcrumbList">' . $home . $breadcrumb . '</nav>'; //phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped

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}

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}

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if ( ! function_exists( 'jetpack_get_term_parents' ) ) {

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/**

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* Return the parents for a given taxonomy term ID.

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*

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* @phan-suppress PhanRedefineFunction -- Covered by function_exists check.

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*

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* @param int $term Taxonomy term whose parents will be returned.

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* @param string $taxonomy Taxonomy name that the term belongs to.

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* @param array $visited Terms already added to prevent duplicates.

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*

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* @return string A list of links to the term parents.

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*/

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function jetpack_get_term_parents( $term, $taxonomy, $visited = array() ) {

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_deprecated_function( __FUNCTION__, 'jetpack-13.8' );

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$parent = get_term( $term, $taxonomy );

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if ( is_wp_error( $parent ) ) {

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return $parent;

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}

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$chain = '';

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if ( $parent->parent && ( $parent->parent !== $parent->term_id ) && ! in_array( $parent->parent, $visited, true ) ) {

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$visited[] = $parent->parent;

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$chain .= jetpack_get_term_parents( $parent->parent, $taxonomy, $visited );

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}

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$chain .= '<a href="' . esc_url( get_category_link( $parent->term_id ) ) . '">' . $parent->name . '</a>';

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return $chain;

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}

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}

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}

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