<?php

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namespace Yoast\WP\SEO\Memoizers;

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use Yoast\WP\SEO\Context\Meta_Tags_Context;

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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 YoastSEO_Vendor\Symfony\Component\DependencyInjection\ContainerInterface;

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/**

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* The presentation memoizer.

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*/

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class Presentation_Memoizer {

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/**

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* The service container.

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*

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* @var ContainerInterface

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*/

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protected $container;

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/**

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* Cache with indexable presentations.

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*

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* @var Indexable_Presentation[]

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*/

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protected $cache = [];

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/**

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* Presentation_Memoizer constructor.

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*

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* @param ContainerInterface $service_container The service container.

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*/

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public function __construct( ContainerInterface $service_container ) {

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$this->container = $service_container;

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}

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/**

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* Gets the presentation of an indexable for a specific page type.

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* This function is memoized by the indexable so every call with the same indexable will yield the same result.

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*

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* @param Indexable $indexable The indexable to get a presentation of.

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* @param Meta_Tags_Context $context The current meta tags context.

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* @param string $page_type The page type.

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*

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* @return Indexable_Presentation The indexable presentation.

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*/

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public function get( Indexable $indexable, Meta_Tags_Context $context, $page_type ) {

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if ( ! isset( $this->cache[ $indexable->id ] ) ) {

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$presentation = $this->container->get( "Yoast\WP\SEO\Presentations\Indexable_{$page_type}_Presentation", ContainerInterface::NULL_ON_INVALID_REFERENCE );

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if ( ! $presentation ) {

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$presentation = $this->container->get( Indexable_Presentation::class );

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}

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$context->presentation = $presentation->of(

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[

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'model' => $indexable,

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'context' => $context,

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]

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);

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$this->cache[ $indexable->id ] = $context->presentation;

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}

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return $this->cache[ $indexable->id ];

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}

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/**

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* Clears the memoization of either a specific indexable or all indexables.

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*

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* @param Indexable|int|null $indexable Optional. The indexable or indexable id to clear the memoization of.

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*/

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public function clear( $indexable = null ) {

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if ( $indexable instanceof Indexable ) {

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unset( $this->cache[ $indexable->id ] );

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return;

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}

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if ( \is_int( $indexable ) ) {

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unset( $this->cache[ $indexable ] );

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return;

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}

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if ( $indexable === null ) {

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$this->cache = [];

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}

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}

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}

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