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Filename : ajax.php
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<?php
/**
 * WPSEO plugin file.
 *
 * @package WPSEO\Admin
 */

if ( ! defined( 'WPSEO_VERSION' ) ) {
	header( 'Status: 403 Forbidden' );
	header( 'HTTP/1.1 403 Forbidden' );
	exit();
}

/**
 * Convenience function to JSON encode and echo results and then die.
 *
 * @param array $results Results array for encoding.
 *
 * @return void
 */
function wpseo_ajax_json_echo_die( $results ) {
	// phpcs:ignore WordPress.Security.EscapeOutput -- Reason: WPSEO_Utils::format_json_encode is safe.
	echo WPSEO_Utils::format_json_encode( $results );
	exit();
}

/**
 * Function used from AJAX calls, takes it variables from $_POST, dies on exit.
 *
 * @return void
 */
function wpseo_set_option() {
	if ( ! current_user_can( 'manage_options' ) ) {
		exit( '-1' );
	}

	check_ajax_referer( 'wpseo-setoption' );

	if ( ! isset( $_POST['option'] ) || ! is_string( $_POST['option'] ) ) {
		exit( '-1' );
	}

	$option = sanitize_text_field( wp_unslash( $_POST['option'] ) );
	if ( $option !== 'page_comments' ) {
		exit( '-1' );
	}

	update_option( $option, 0 );
	exit( '1' );
}

add_action( 'wp_ajax_wpseo_set_option', 'wpseo_set_option' );

/**
 * Since 3.2 Notifications are dismissed in the Notification Center.
 */
add_action( 'wp_ajax_yoast_dismiss_notification', [ 'Yoast_Notification_Center', 'ajax_dismiss_notification' ] );

/**
 * Function used to remove the admin notices for several purposes, dies on exit.
 *
 * @return void
 */
function wpseo_set_ignore() {
	if ( ! current_user_can( 'manage_options' ) ) {
		exit( '-1' );
	}

	check_ajax_referer( 'wpseo-ignore' );

	if ( ! isset( $_POST['option'] ) || ! is_string( $_POST['option'] ) ) {
		exit( '-1' );
	}

	$ignore_key = sanitize_text_field( wp_unslash( $_POST['option'] ) );
	WPSEO_Options::set( 'ignore_' . $ignore_key, true );

	exit( '1' );
}

add_action( 'wp_ajax_wpseo_set_ignore', 'wpseo_set_ignore' );

/**
 * Save an individual SEO title from the Bulk Editor.
 *
 * @return void
 */
function wpseo_save_title() {
	wpseo_save_what( 'title' );
}

add_action( 'wp_ajax_wpseo_save_title', 'wpseo_save_title' );

/**
 * Save an individual meta description from the Bulk Editor.
 *
 * @return void
 */
function wpseo_save_description() {
	wpseo_save_what( 'metadesc' );
}

add_action( 'wp_ajax_wpseo_save_metadesc', 'wpseo_save_description' );

/**
 * Save titles & descriptions.
 *
 * @param string $what Type of item to save (title, description).
 *
 * @return void
 */
function wpseo_save_what( $what ) {
	check_ajax_referer( 'wpseo-bulk-editor' );

	if ( ! isset( $_POST['new_value'], $_POST['wpseo_post_id'], $_POST['existing_value'] ) || ! is_string( $_POST['new_value'] ) || ! is_string( $_POST['existing_value'] ) ) {
		exit( '-1' );
	}

	$new = sanitize_text_field( wp_unslash( $_POST['new_value'] ) );
	// phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- Reason: We are casting the unsafe value to an integer.
	$post_id  = (int) wp_unslash( $_POST['wpseo_post_id'] );
	$original = sanitize_text_field( wp_unslash( $_POST['existing_value'] ) );

	if ( $post_id === 0 ) {
		exit( '-1' );
	}

	$results = wpseo_upsert_new( $what, $post_id, $new, $original );

	wpseo_ajax_json_echo_die( $results );
}

/**
 * Helper function to update a post's meta data, returning relevant information
 * about the information updated and the results or the meta update.
 *
 * @param int    $post_id         Post ID.
 * @param string $new_meta_value  New meta value to record.
 * @param string $orig_meta_value Original meta value.
 * @param string $meta_key        Meta key string.
 * @param string $return_key      Return key string to use in results.
 *
 * @return array
 */
function wpseo_upsert_meta( $post_id, $new_meta_value, $orig_meta_value, $meta_key, $return_key ) {

	$post_id                  = intval( $post_id );
	$sanitized_new_meta_value = wp_strip_all_tags( $new_meta_value );
	$orig_meta_value          = wp_strip_all_tags( $orig_meta_value );

	$upsert_results = [
		'status'                 => 'success',
		'post_id'                => $post_id,
		"new_{$return_key}"      => $sanitized_new_meta_value,
		"original_{$return_key}" => $orig_meta_value,
	];

	$the_post = get_post( $post_id );
	if ( empty( $the_post ) ) {

		$upsert_results['status']  = 'failure';
		$upsert_results['results'] = __( 'Post doesn\'t exist.', 'wordpress-seo' );

		return $upsert_results;
	}

	$post_type_object = get_post_type_object( $the_post->post_type );
	if ( ! $post_type_object ) {

		$upsert_results['status']  = 'failure';
		$upsert_results['results'] = sprintf(
			/* translators: %s expands to post type. */
			__( 'Post has an invalid Content Type: %s.', 'wordpress-seo' ),
			$the_post->post_type
		);

		return $upsert_results;
	}

	if ( ! current_user_can( $post_type_object->cap->edit_posts ) ) {

		$upsert_results['status']  = 'failure';
		$upsert_results['results'] = sprintf(
			/* translators: %s expands to post type name. */
			__( 'You can\'t edit %s.', 'wordpress-seo' ),
			$post_type_object->label
		);

		return $upsert_results;
	}

	if ( ! current_user_can( $post_type_object->cap->edit_others_posts ) && (int) $the_post->post_author !== get_current_user_id() ) {

		$upsert_results['status']  = 'failure';
		$upsert_results['results'] = sprintf(
			/* translators: %s expands to the name of a post type (plural). */
			__( 'You can\'t edit %s that aren\'t yours.', 'wordpress-seo' ),
			$post_type_object->label
		);

		return $upsert_results;
	}

	if ( $sanitized_new_meta_value === $orig_meta_value && $sanitized_new_meta_value !== $new_meta_value ) {
		$upsert_results['status']  = 'failure';
		$upsert_results['results'] = __( 'You have used HTML in your value which is not allowed.', 'wordpress-seo' );

		return $upsert_results;
	}

	$res = update_post_meta( $post_id, $meta_key, $sanitized_new_meta_value );

	$upsert_results['status']  = ( $res !== false ) ? 'success' : 'failure';
	$upsert_results['results'] = $res;

	return $upsert_results;
}

/**
 * Save all titles sent from the Bulk Editor.
 *
 * @return void
 */
function wpseo_save_all_titles() {
	wpseo_save_all( 'title' );
}

add_action( 'wp_ajax_wpseo_save_all_titles', 'wpseo_save_all_titles' );

/**
 * Save all description sent from the Bulk Editor.
 *
 * @return void
 */
function wpseo_save_all_descriptions() {
	wpseo_save_all( 'metadesc' );
}

add_action( 'wp_ajax_wpseo_save_all_descriptions', 'wpseo_save_all_descriptions' );

/**
 * Utility function to save values.
 *
 * @param string $what Type of item so save.
 *
 * @return void
 */
function wpseo_save_all( $what ) {
	check_ajax_referer( 'wpseo-bulk-editor' );

	$results = [];
	if ( ! isset( $_POST['items'], $_POST['existingItems'] ) ) {
		wpseo_ajax_json_echo_die( $results );
	}

	$new_values      = array_map( [ 'WPSEO_Utils', 'sanitize_text_field' ], wp_unslash( (array) $_POST['items'] ) );
	$original_values = array_map( [ 'WPSEO_Utils', 'sanitize_text_field' ], wp_unslash( (array) $_POST['existingItems'] ) );

	foreach ( $new_values as $post_id => $new_value ) {
		$original_value = $original_values[ $post_id ];
		$results[]      = wpseo_upsert_new( $what, $post_id, $new_value, $original_value );
	}

	wpseo_ajax_json_echo_die( $results );
}

/**
 * Insert a new value.
 *
 * @param string $what      Item type (such as title).
 * @param int    $post_id   Post ID.
 * @param string $new_value New value to record.
 * @param string $original  Original value.
 *
 * @return string
 */
function wpseo_upsert_new( $what, $post_id, $new_value, $original ) {
	$meta_key = WPSEO_Meta::$meta_prefix . $what;

	return wpseo_upsert_meta( $post_id, $new_value, $original, $meta_key, $what );
}

/**
 * Retrieves the post ids where the keyword is used before as well as the types of those posts.
 *
 * @return void
 */
function ajax_get_keyword_usage_and_post_types() {
	check_ajax_referer( 'wpseo-keyword-usage-and-post-types', 'nonce' );

	if ( ! isset( $_POST['post_id'], $_POST['keyword'] ) || ! is_string( $_POST['keyword'] ) ) {
		exit( '-1' );
	}

	// phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- We are casting to an integer.
	$post_id = (int) wp_unslash( $_POST['post_id'] );

	if ( $post_id === 0 || ! current_user_can( 'edit_post', $post_id ) ) {
		exit( '-1' );
	}

	$keyword = sanitize_text_field( wp_unslash( $_POST['keyword'] ) );

	$post_ids = WPSEO_Meta::keyword_usage( $keyword, $post_id );

	$return_object = [
		'keyword_usage' => $post_ids,
		'post_types'    => WPSEO_Meta::post_types_for_ids( $post_ids ),
	];

	wp_die(
		// phpcs:ignore WordPress.Security.EscapeOutput -- Reason: WPSEO_Utils::format_json_encode is safe.
		WPSEO_Utils::format_json_encode( $return_object )
	);
}

add_action( 'wp_ajax_get_focus_keyword_usage_and_post_types', 'ajax_get_keyword_usage_and_post_types' );


/**
 * Retrieves the keyword for the keyword doubles of the termpages.
 *
 * @return void
 */
function ajax_get_term_keyword_usage() {
	check_ajax_referer( 'wpseo-keyword-usage', 'nonce' );

	if ( ! isset( $_POST['post_id'], $_POST['keyword'], $_POST['taxonomy'] ) || ! is_string( $_POST['keyword'] ) || ! is_string( $_POST['taxonomy'] ) ) {
		wp_die( -1 );
	}

	// phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- Reason: We are casting the unsafe input to an integer.
	$post_id = (int) wp_unslash( $_POST['post_id'] );

	if ( $post_id === 0 ) {
		wp_die( -1 );
	}

	$keyword       = sanitize_text_field( wp_unslash( $_POST['keyword'] ) );
	$taxonomy_name = sanitize_text_field( wp_unslash( $_POST['taxonomy'] ) );

	$taxonomy = get_taxonomy( $taxonomy_name );

	if ( ! $taxonomy ) {
		wp_die( 0 );
	}

	if ( ! current_user_can( $taxonomy->cap->edit_terms ) ) {
		wp_die( -1 );
	}

	$usage = WPSEO_Taxonomy_Meta::get_keyword_usage( $keyword, $post_id, $taxonomy_name );

	// Normalize the result so it is the same as the post keyword usage AJAX request.
	$usage = $usage[ $keyword ];

	wp_die(
		// phpcs:ignore WordPress.Security.EscapeOutput -- Reason: WPSEO_Utils::format_json_encode is safe.
		WPSEO_Utils::format_json_encode( $usage )
	);
}

add_action( 'wp_ajax_get_term_keyword_usage', 'ajax_get_term_keyword_usage' );

/**
 * Registers hooks for all AJAX integrations.
 *
 * @return void
 */
function wpseo_register_ajax_integrations() {
	$integrations = [ new Yoast_Network_Admin() ];

	foreach ( $integrations as $integration ) {
		$integration->register_ajax_hooks();
	}
}

wpseo_register_ajax_integrations();

new WPSEO_Shortcode_Filter();

new WPSEO_Taxonomy_Columns();

/* ********************* DEPRECATED FUNCTIONS ********************* */

/**
 * Retrieves the keyword for the keyword doubles.
 *
 * @return void
 */
function ajax_get_keyword_usage() {
	_deprecated_function( __METHOD__, 'WPSEO 20.4' );
	check_ajax_referer( 'wpseo-keyword-usage', 'nonce' );

	if ( ! isset( $_POST['post_id'], $_POST['keyword'] ) || ! is_string( $_POST['keyword'] ) ) {
		exit( '-1' );
	}

	// phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- We are casting to an integer.
	$post_id = (int) wp_unslash( $_POST['post_id'] );

	if ( $post_id === 0 || ! current_user_can( 'edit_post', $post_id ) ) {
		exit( '-1' );
	}

	$keyword = sanitize_text_field( wp_unslash( $_POST['keyword'] ) );

	wp_die(
		// phpcs:ignore WordPress.Security.EscapeOutput -- Reason: WPSEO_Utils::format_json_encode is safe.
		WPSEO_Utils::format_json_encode( WPSEO_Meta::keyword_usage( $keyword, $post_id ) )
	);
}