<?php

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/**

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* WPSEO plugin file.

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*

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* @package WPSEO\Admin\Watchers

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*/

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/**

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* Class WPSEO_Slug_Change_Watcher.

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*/

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class WPSEO_Slug_Change_Watcher implements WPSEO_WordPress_Integration {

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/**

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* Registers all hooks to WordPress.

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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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// If the current plugin is Yoast SEO Premium, stop registering.

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if ( YoastSEO()->helpers->product->is_premium() ) {

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return;

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}

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add_action( 'admin_enqueue_scripts', [ $this, 'enqueue_assets' ] );

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// Detect a post trash.

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add_action( 'wp_trash_post', [ $this, 'detect_post_trash' ] );

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// Detect a post delete.

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add_action( 'before_delete_post', [ $this, 'detect_post_delete' ] );

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// Detects deletion of a term.

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add_action( 'delete_term_taxonomy', [ $this, 'detect_term_delete' ] );

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}

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/**

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* Enqueues the quick edit handler.

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*

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* @return void

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*/

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public function enqueue_assets() {

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global $pagenow;

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if ( ! in_array( $pagenow, [ 'edit.php', 'edit-tags.php' ], true ) ) {

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return;

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}

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$asset_manager = new WPSEO_Admin_Asset_Manager();

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$asset_manager->enqueue_script( 'quick-edit-handler' );

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}

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/**

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* Shows a message when a post is about to get trashed.

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*

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* @param int $post_id The current post ID.

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*

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* @return void

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*/

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public function detect_post_trash( $post_id ) {

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if ( ! $this->is_post_viewable( $post_id ) ) {

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return;

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}

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$post_label = $this->get_post_type_label( get_post_type( $post_id ) );

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/* translators: %1$s expands to the translated name of the post type. */

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$first_sentence = sprintf( __( 'You just trashed a %1$s.', 'wordpress-seo' ), $post_label );

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$second_sentence = __( 'Search engines and other websites can still send traffic to your trashed content.', 'wordpress-seo' );

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$message = $this->get_message( $first_sentence, $second_sentence );

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$this->add_notification( $message );

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}

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/**

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* Shows a message when a post is about to get trashed.

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*

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* @param int $post_id The current post ID.

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*

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* @return void

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*/

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public function detect_post_delete( $post_id ) {

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if ( ! $this->is_post_viewable( $post_id ) ) {

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return;

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}

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$post_label = $this->get_post_type_label( get_post_type( $post_id ) );

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/* translators: %1$s expands to the translated name of the post type. */

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$first_sentence = sprintf( __( 'You just deleted a %1$s.', 'wordpress-seo' ), $post_label );

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$second_sentence = __( 'Search engines and other websites can still send traffic to your deleted content.', 'wordpress-seo' );

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$message = $this->get_message( $first_sentence, $second_sentence );

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$this->add_notification( $message );

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}

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/**

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* Shows a message when a term is about to get deleted.

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*

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* @param int $term_taxonomy_id The term taxonomy ID that will be deleted.

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*

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* @return void

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*/

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public function detect_term_delete( $term_taxonomy_id ) {

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if ( ! $this->is_term_viewable( $term_taxonomy_id ) ) {

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return;

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}

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$term = get_term_by( 'term_taxonomy_id', (int) $term_taxonomy_id );

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$term_label = $this->get_taxonomy_label_for_term( $term->term_id );

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/* translators: %1$s expands to the translated name of the term. */

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$first_sentence = sprintf( __( 'You just deleted a %1$s.', 'wordpress-seo' ), $term_label );

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$second_sentence = __( 'Search engines and other websites can still send traffic to your deleted content.', 'wordpress-seo' );

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$message = $this->get_message( $first_sentence, $second_sentence );

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$this->add_notification( $message );

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}

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/**

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* Checks if the post is viewable.

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*

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* @param string $post_id The post id to check.

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*

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* @return bool Whether the post is viewable or not.

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*/

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protected function is_post_viewable( $post_id ) {

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$post_type = get_post_type( $post_id );

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if ( ! WPSEO_Post_Type::is_post_type_accessible( $post_type ) ) {

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return false;

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}

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$post_status = get_post_status( $post_id );

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if ( ! $this->check_visible_post_status( $post_status ) ) {

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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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* Checks if the term is viewable.

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*

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* @param int $term_taxonomy_id The term taxonomy ID to check.

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*

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* @return bool Whether the term is viewable or not.

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*/

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protected function is_term_viewable( $term_taxonomy_id ) {

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$term = get_term_by( 'term_taxonomy_id', (int) $term_taxonomy_id );

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if ( ! $term || is_wp_error( $term ) ) {

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return false;

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}

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$taxonomy = get_taxonomy( $term->taxonomy );

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if ( ! $taxonomy ) {

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return false;

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}

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return $taxonomy->publicly_queryable || $taxonomy->public;

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}

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/**

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* Gets the taxonomy label to use for a term.

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*

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* @param int $term_id The term ID.

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*

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* @return string The taxonomy's singular label.

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*/

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protected function get_taxonomy_label_for_term( $term_id ) {

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$term = get_term( $term_id );

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$taxonomy = get_taxonomy( $term->taxonomy );

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return $taxonomy->labels->singular_name;

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}

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/**

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* Retrieves the singular post type label.

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*

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* @param string $post_type Post type to retrieve label from.

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*

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* @return string The singular post type name.

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*/

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protected function get_post_type_label( $post_type ) {

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$post_type_object = get_post_type_object( $post_type );

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// If the post type of this post wasn't registered default back to post.

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if ( $post_type_object === null ) {

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$post_type_object = get_post_type_object( 'post' );

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}

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return $post_type_object->labels->singular_name;

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}

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/**

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* Checks whether the given post status is visible or not.

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*

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* @param string $post_status The post status to check.

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*

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* @return bool Whether or not the post is visible.

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*/

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protected function check_visible_post_status( $post_status ) {

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$visible_post_statuses = [

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'publish',

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'static',

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'private',

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];

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return in_array( $post_status, $visible_post_statuses, true );

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}

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/**

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* Returns the message around changed URLs.

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*

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* @param string $first_sentence The first sentence of the notification.

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* @param string $second_sentence The second sentence of the notification.

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*

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* @return string The full notification.

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*/

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protected function get_message( $first_sentence, $second_sentence ) {

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return '<h2>' . __( 'Make sure you don\'t miss out on traffic!', 'wordpress-seo' ) . '</h2>'

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. '<p>'

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. $first_sentence

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. ' ' . $second_sentence

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. ' ' . __( 'You should create a redirect to ensure your visitors do not get a 404 error when they click on the no longer working URL.', 'wordpress-seo' )

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/* translators: %s expands to Yoast SEO Premium */

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. ' ' . sprintf( __( 'With %s, you can easily create such redirects.', 'wordpress-seo' ), 'Yoast SEO Premium' )

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. '</p>'

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. '<p><a class="yoast-button-upsell" data-action="load-nfd-ctb" data-ctb-id="f6a84663-465f-4cb5-8ba5-f7a6d72224b2" href="' . WPSEO_Shortlinker::get( 'https://yoa.st/1d0' ) . '" target="_blank">'

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/* translators: %s expands to Yoast SEO Premium */

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. sprintf( __( 'Get %s', 'wordpress-seo' ), 'Yoast SEO Premium' )

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/* translators: Hidden accessibility text. */

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. '<span class="screen-reader-text">' . __( '(Opens in a new browser tab)', 'wordpress-seo' ) . '</span>'

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. '<span aria-hidden="true" class="yoast-button-upsell__caret"></span>'

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. '</a></p>';

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}

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/**

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* Adds a notification to be shown on the next page request since posts are updated in an ajax request.

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*

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* @param string $message The message to add to the notification.

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*

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* @return void

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*/

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protected function add_notification( $message ) {

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$notification = new Yoast_Notification(

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$message,

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[

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'type' => 'notice-warning is-dismissible',

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'yoast_branding' => true,

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]

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);

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$notification_center = Yoast_Notification_Center::get();

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$notification_center->add_notification( $notification );

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}

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}

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