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Editing: class-cornerstone-utils.php

<?php

namespace Automattic\Jetpack_Boost\Lib\Cornerstone;

use Automattic\Jetpack_Boost\Lib\Critical_CSS\Source_Providers\Providers\Cornerstone_Provider;

class Cornerstone_Utils {

/**
	 * Get the list of cornerstone pages.
	 *
	 * @return string[] The relative URLs of all the cornerstone pages.
	 */
	public static function get_list() {
		/**
		 * Filters the list of cornerstone pages. This list includes the predefined and custom pages.
		 * If you want to change the list of custom pages, use `jetpack_boost_cornerstone_pages_list` instead.
		 *
		 * @since 4.4.0-beta1
		 *
		 * @param string[] $urls The absolute URLs of all the cornerstone pages.
		 */
		return apply_filters( 'jetpack_boost_cornerstone_pages_list_complete', array_merge( self::get_predefined_list(), self::get_custom_list() ) );
	}

/**
	 * Gets the list of Cornerstone Pages that the user has added to the custom list.
	 *
	 * @return string[] The absolute URLs of the cornerstone pages.
	 *
	 * @since 4.2.0
	 */
	public static function get_custom_list() {
		$pages = jetpack_boost_ds_get( 'cornerstone_pages_list' );

// Bail early if no pages are found.
		if ( empty( $pages ) ) {
			return array();
		}

return self::maybe_trailing_slash_urls( $pages );
	}

/**
	 * Gets the list of Cornerstone Pages that the user cannot remove.
	 *
	 * @return string[] The absolute URLs of the cornerstone pages.
	 *
	 * @since 4.2.0
	 */
	public static function get_predefined_list() {
		return self::maybe_trailing_slash_urls( array( home_url() ) );
	}

/**
	 * Checks if a URL is a cornerstone page.
	 *
	 * @param string $url The URL to check.
	 * @return bool True if the URL is a cornerstone page, false otherwise.
	 */
	public static function is_cornerstone_page_by_url( $url ) {
		$cornerstone_pages = self::get_list();
		if ( empty( $cornerstone_pages ) ) {
			return false;
		}

$cornerstone_pages = array_map( 'untrailingslashit', $cornerstone_pages );
		return in_array( self::sanitize_url( $url ), $cornerstone_pages, true );
	}

/**
	 * Sanitize a URL to make it a compatible cornerstone page URL.
	 *
	 * @param string $url The URL to sanitize.
	 * @return string The sanitized URL.
	 */
	public static function sanitize_url( $url ) {
		return untrailingslashit( $url );
	}

/**
	 * Get the provider key for a given URL.
	 *
	 * @param string $url The URL to get the provider key for.
	 * @return string The provider key.
	 */
	public static function get_provider_key( $url ) {
		return Cornerstone_Provider::get_provider_key( self::sanitize_url( $url ) );
	}

/**
	 * Prepare provider data for a given URL.
	 * This is usually sent to the Cloud API.
	 *
	 * @param string $url The URL to prepare provider data for.
	 * @return array The provider data.
	 */
	public static function prepare_provider_data( $url ) {
		return array(
			'key' => self::get_provider_key( $url ),
			'url' => self::sanitize_url( $url ),
		);
	}

/**
	 * Checks if the current page is a cornerstone page.
	 *
	 * @return bool True if the current page is a cornerstone page, false otherwise.
	 *
	 * @since 3.13.1
	 */
	public static function is_current_page_cornerstone() {
		return self::is_cornerstone_page_by_url( Cornerstone_Provider::get_request_url() );
	}

/**
	 * Check if a post ID is a cornerstone page.
	 *
	 * @param int $post_id The ID of the post to check.
	 * @return bool True if the post is a cornerstone page, false otherwise.
	 */
	public static function is_cornerstone_page( $post_id ) {
		return self::is_cornerstone_page_by_url( get_permalink( $post_id ) );
	}

/**
	 * Adds trailing slashes to URLs if the current permalink structure requires it.
	 *
	 * @param string[] $urls The URLs to process.
	 * @return string[] The processed URLs.
	 */
	public static function maybe_trailing_slash_urls( $urls ) {
		$permalink_structure = \get_option( 'permalink_structure' );

// If permalink structure ends with slash, add trailing slashes.
		if ( $permalink_structure && substr( $permalink_structure, -1 ) === '/' ) {
			$urls = array_map( 'trailingslashit', $urls );
		}

return $urls;
	}
}

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