<?php

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namespace Yoast\WP\SEO\Integrations\Third_Party;

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use WPSEO_Replace_Vars;

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use Yoast\WP\SEO\Conditionals\Front_End_Conditional;

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use Yoast\WP\SEO\Conditionals\WooCommerce_Conditional;

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use Yoast\WP\SEO\Helpers\Options_Helper;

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use Yoast\WP\SEO\Helpers\Pagination_Helper;

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use Yoast\WP\SEO\Integrations\Integration_Interface;

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use Yoast\WP\SEO\Memoizers\Meta_Tags_Context_Memoizer;

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use Yoast\WP\SEO\Models\Indexable;

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use Yoast\WP\SEO\Presentations\Indexable_Presentation;

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use Yoast\WP\SEO\Repositories\Indexable_Repository;

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/**

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* WooCommerce integration.

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*/

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class WooCommerce implements Integration_Interface {

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/**

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* The options helper.

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*

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* @var Options_Helper

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*/

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private $options;

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/**

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* The WPSEO Replace Vars object.

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*

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* @var WPSEO_Replace_Vars

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*/

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private $replace_vars;

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/**

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* The memoizer for the meta tags context.

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*

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* @var Meta_Tags_Context_Memoizer

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*/

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protected $context_memoizer;

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/**

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* The indexable repository.

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*

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* @var Indexable_Repository

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*/

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private $repository;

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/**

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* The pagination helper.

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*

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* @var Pagination_Helper

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*/

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protected $pagination_helper;

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/**

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* Returns the conditionals based in which this loadable should be active.

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*

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* @return array

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*/

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public static function get_conditionals() {

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return [ WooCommerce_Conditional::class, Front_End_Conditional::class ];

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}

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/**

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* WooCommerce constructor.

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*

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* @param Options_Helper $options The options helper.

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* @param WPSEO_Replace_Vars $replace_vars The replace vars helper.

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* @param Meta_Tags_Context_Memoizer $context_memoizer The meta tags context memoizer.

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* @param Indexable_Repository $repository The indexable repository.

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* @param Pagination_Helper $pagination_helper The paginataion helper.

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*/

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public function __construct(

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Options_Helper $options,

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WPSEO_Replace_Vars $replace_vars,

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Meta_Tags_Context_Memoizer $context_memoizer,

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Indexable_Repository $repository,

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Pagination_Helper $pagination_helper

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) {

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$this->options = $options;

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$this->replace_vars = $replace_vars;

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$this->context_memoizer = $context_memoizer;

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$this->repository = $repository;

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$this->pagination_helper = $pagination_helper;

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}

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/**

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* Initializes the integration.

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*

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* This is the place to register hooks and filters.

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*

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* @return void

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*/

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public function register_hooks() {

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\add_filter( 'wpseo_frontend_page_type_simple_page_id', [ $this, 'get_page_id' ] );

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\add_filter( 'wpseo_breadcrumb_indexables', [ $this, 'add_shop_to_breadcrumbs' ] );

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\add_filter( 'wpseo_title', [ $this, 'title' ], 10, 2 );

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\add_filter( 'wpseo_metadesc', [ $this, 'description' ], 10, 2 );

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\add_filter( 'wpseo_canonical', [ $this, 'canonical' ], 10, 2 );

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\add_filter( 'wpseo_adjacent_rel_url', [ $this, 'adjacent_rel_url' ], 10, 3 );

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}

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/**

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* Returns the correct canonical when WooCommerce is enabled.

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*

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* @param string $canonical The current canonical.

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* @param Indexable_Presentation|null $presentation The indexable presentation.

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*

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* @return string The correct canonical.

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*/

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public function canonical( $canonical, $presentation = null ) {

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if ( ! $this->is_shop_page() ) {

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return $canonical;

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}

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$url = $this->get_shop_paginated_link( 'curr', $presentation );

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if ( $url ) {

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return $url;

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}

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return $canonical;

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}

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/**

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* Returns correct adjacent pages when WooCommerce is enabled.

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*

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* @param string $link The current link.

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* @param string $rel Link relationship, prev or next.

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* @param Indexable_Presentation|null $presentation The indexable presentation.

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*

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* @return string The correct link.

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*/

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public function adjacent_rel_url( $link, $rel, $presentation = null ) {

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if ( ! $this->is_shop_page() ) {

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return $link;

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}

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if ( $rel !== 'next' && $rel !== 'prev' ) {

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return $link;

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}

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$url = $this->get_shop_paginated_link( $rel, $presentation );

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if ( $url ) {

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return $url;

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}

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return $link;

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}

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/**

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* Adds a breadcrumb for the shop page.

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*

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* @param Indexable[] $indexables The array with indexables.

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*

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* @return Indexable[] The indexables to be shown in the breadcrumbs, with the shop page added.

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*/

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public function add_shop_to_breadcrumbs( $indexables ) {

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$shop_page_id = $this->get_shop_page_id();

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if ( $shop_page_id < 1 ) {

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return $indexables;

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}

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foreach ( $indexables as $index => $indexable ) {

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if ( $indexable->object_type === 'post-type-archive' && $indexable->object_sub_type === 'product' ) {

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$indexables[ $index ] = $this->repository->find_by_id_and_type( $shop_page_id, 'post' );

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}

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}

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return $indexables;

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}

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/**

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* Returns the ID of the WooCommerce shop page when the currently opened page is the shop page.

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*

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* @param int $page_id The page id.

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*

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* @return int The Page ID of the shop.

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*/

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public function get_page_id( $page_id ) {

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if ( ! $this->is_shop_page() ) {

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return $page_id;

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}

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return $this->get_shop_page_id();

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}

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/**

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* Handles the title.

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*

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* @param string $title The title.

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* @param Indexable_Presentation|null $presentation The indexable presentation.

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*

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* @return string The title to use.

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*/

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public function title( $title, $presentation = null ) {

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$presentation = $this->ensure_presentation( $presentation );

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if ( $presentation->model->title ) {

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return $title;

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}

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if ( ! $this->is_shop_page() ) {

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return $title;

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}

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if ( ! \is_archive() ) {

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return $title;

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}

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$shop_page_id = $this->get_shop_page_id();

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if ( $shop_page_id < 1 ) {

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return $title;

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}

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$product_template_title = $this->get_product_template( 'title-product', $shop_page_id );

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if ( $product_template_title ) {

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return $product_template_title;

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}

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return $title;

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}

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/**

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* Handles the meta description.

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*

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* @param string $description The title.

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* @param Indexable_Presentation|null $presentation The indexable presentation.

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*

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* @return string The description to use.

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*/

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public function description( $description, $presentation = null ) {

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$presentation = $this->ensure_presentation( $presentation );

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if ( $presentation->model->description ) {

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return $description;

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}

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if ( ! $this->is_shop_page() ) {

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return $description;

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}

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if ( ! \is_archive() ) {

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return $description;

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}

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$shop_page_id = $this->get_shop_page_id();

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if ( $shop_page_id < 1 ) {

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return $description;

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}

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$product_template_description = $this->get_product_template( 'metadesc-product', $shop_page_id );

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if ( $product_template_description ) {

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return $product_template_description;

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}

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return $description;

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}

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/**

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* Checks if the current page is a WooCommerce shop page.

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*

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* @return bool True when the page is a shop page.

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*/

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protected function is_shop_page() {

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if ( ! \is_shop() ) {

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return false;

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}

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if ( \is_search() ) {

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return false;

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}

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return true;

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}

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/**

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* Uses template for the given option name and replace the replacement variables on it.

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*

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* @param string $option_name The option name to get the template for.

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* @param string $shop_page_id The page id to retrieve template for.

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*

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* @return string The rendered value.

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*/

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protected function get_product_template( $option_name, $shop_page_id ) {

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$template = $this->options->get( $option_name );

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$page = \get_post( $shop_page_id );

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return $this->replace_vars->replace( $template, $page );

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}

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/**

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* Returns the id of the set WooCommerce shop page.

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*

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* @return int The ID of the set page.

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*/

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protected function get_shop_page_id() {

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if ( ! \function_exists( 'wc_get_page_id' ) ) {

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return -1;

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}

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return \wc_get_page_id( 'shop' );

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}

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/**

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* Get paginated link for shop page.

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*

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* @param string $rel Link relationship, prev or next or curr.

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* @param Indexable_Presentation|null $presentation The indexable presentation.

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*

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* @return string|null The link.

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*/

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protected function get_shop_paginated_link( $rel, $presentation = null ) {

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$presentation = $this->ensure_presentation( $presentation );

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$permalink = $presentation->get_permalink();

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if ( ! $permalink ) {

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return null;

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}

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$current_page = \max( 1, $this->pagination_helper->get_current_archive_page_number() );

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if ( $rel === 'curr' && $current_page === 1 ) {

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return $permalink;

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}

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if ( $rel === 'curr' && $current_page > 1 ) {

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return $this->pagination_helper->get_paginated_url( $permalink, $current_page );

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}

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if ( $rel === 'prev' && $current_page === 2 ) {

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return $permalink;

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}

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if ( $rel === 'prev' && $current_page > 2 ) {

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return $this->pagination_helper->get_paginated_url( $permalink, ( $current_page - 1 ) );

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}

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if ( $rel === 'next' && $current_page < $this->pagination_helper->get_number_of_archive_pages() ) {

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return $this->pagination_helper->get_paginated_url( $permalink, ( $current_page + 1 ) );

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}

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return null;

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}

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/**

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* Ensures a presentation is available.

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*

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* @param Indexable_Presentation $presentation The indexable presentation.

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*

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* @return Indexable_Presentation The presentation, taken from the current page if the input was invalid.

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*/

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protected function ensure_presentation( $presentation ) {

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if ( \is_a( $presentation, Indexable_Presentation::class ) ) {

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return $presentation;

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}

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$context = $this->context_memoizer->for_current_page();

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return $context->presentation;

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}

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}

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