<?php
namespace Yoast\WP\SEO\Presentations;
use Yoast\WP\SEO\Helpers\Pagination_Helper;
use Yoast\WP\SEO\Models\Indexable;
/**
* Class Archive_Adjacent.
*
* Presentation object for indexables.
*
* @property Indexable $model The indexable.
*/
trait Archive_Adjacent {
/**
* Holds the Pagination_Helper instance.
*
* @var Pagination_Helper
*/
protected $pagination;
/**
* Sets the helpers for the trait.
*
* @required
*
* @codeCoverageIgnore
*
* @param Pagination_Helper $pagination The pagination helper.
*
* @return void
*/
public function set_archive_adjacent_helpers( Pagination_Helper $pagination ) {
$this->pagination = $pagination;
}
/**
* Generates the rel prev.
*
* @return string
*/
public function generate_rel_prev() {
if ( $this->pagination->is_rel_adjacent_disabled() ) {
return '';
}
$current_page = \max( 1, $this->pagination->get_current_archive_page_number() );
// Check if there is a previous page.
if ( $current_page === 1 ) {
return '';
}
// Check if the previous page is the first page.
if ( $current_page === 2 ) {
return $this->permalink;
}
return $this->pagination->get_paginated_url( $this->permalink, ( $current_page - 1 ) );
}
/**
* Generates the rel next.
*
* @return string
*/
public function generate_rel_next() {
if ( $this->pagination->is_rel_adjacent_disabled() ) {
return '';
}
$current_page = \max( 1, $this->pagination->get_current_archive_page_number() );
if ( $this->pagination->get_number_of_archive_pages() <= $current_page ) {
return '';
}
return $this->pagination->get_paginated_url( $this->permalink, ( $current_page + 1 ) );
}
}