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File name : class-status.php

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<?php
/**
 * Class to handle the Status of Jetpack Protect
 *
 * @package automattic/jetpack-protect-status
 */

namespace Automattic\Jetpack\Protect_Status;

use Automattic\Jetpack\Protect_Models\Extension_Model;
use Automattic\Jetpack\Protect_Models\Status_Model;

/**
 * Class that handles fetching and caching the Status of vulnerabilities check from the WPCOM servers
 */
class Status {

const PACKAGE_VERSION = '0.2.2';
	/**
	 * Name of the option where status is stored
	 *
	 * @var string
	 */
	const OPTION_NAME = '';

/**
	 * Name of the option where the timestamp of the status is stored
	 *
	 * @var string
	 */
	const OPTION_TIMESTAMP_NAME = '';

/**
	 * Time in seconds that the cache should last
	 *
	 * @var int
	 */
	const OPTION_EXPIRES_AFTER = 3600; // 1 hour.

/**
	 * Time in seconds that the cache for the initial empty response should last
	 *
	 * @var int
	 */
	const INITIAL_OPTION_EXPIRES_AFTER = 1 * MINUTE_IN_SECONDS;

/**
	 * Memoization for the current status
	 *
	 * @var null|Status_Model
	 */
	public static $status = null;

/**
	 * Gets the current status of the Jetpack Protect checks
	 *
	 * @param bool $refresh_from_wpcom Refresh the local plan and status cache from wpcom.
	 * @return Status_Model
	 */
	public static function get_status( $refresh_from_wpcom = false ) {
		$use_scan_status = Plan::has_required_plan();

if ( defined( 'JETPACK_PROTECT_DEV__DATA_SOURCE' ) ) {
			if ( 'scan_api' === JETPACK_PROTECT_DEV__DATA_SOURCE ) {
				$use_scan_status = true;
			}

if ( 'protect_report' === JETPACK_PROTECT_DEV__DATA_SOURCE ) {
				$use_scan_status = false;
			}
		}

self::$status = $use_scan_status ? Scan_Status::get_status( $refresh_from_wpcom ) : Protect_Status::get_status( $refresh_from_wpcom );
		return self::$status;
	}

/**
	 * Checks if the current cached status is expired and should be renewed
	 *
	 * @return boolean
	 */
	public static function is_cache_expired() {
		$option_timestamp = get_option( static::OPTION_TIMESTAMP_NAME );

if ( ! $option_timestamp ) {
			return true;
		}

return time() > (int) $option_timestamp;
	}

/**
	 * Checks if we should consider the stored cache or bypass it
	 *
	 * @return boolean
	 */
	public static function should_use_cache() {
		return defined( 'JETPACK_PROTECT_DEV__BYPASS_CACHE' ) && JETPACK_PROTECT_DEV__BYPASS_CACHE ? false : true;
	}

/**
	 * Gets the current cached status
	 *
	 * @return bool|array False if value is not found. Array with values if cache is found.
	 */
	public static function get_from_options() {
		return maybe_unserialize( get_option( static::OPTION_NAME ) );
	}

/**
	 * Updated the cached status and its timestamp
	 *
	 * @param array $status The new status to be cached.
	 * @return void
	 */
	public static function update_status_option( $status ) {
		// TODO: Sanitize $status.
		update_option( static::OPTION_NAME, maybe_serialize( $status ) );
		$end_date = self::get_cache_end_date_by_status( $status );
		update_option( static::OPTION_TIMESTAMP_NAME, $end_date );
	}

/**
	 * Returns the timestamp the cache should expire depending on the current status
	 *
	 * Initial empty status, which are returned before the first check was performed, should be cache for less time
	 *
	 * @param object $status The response from the server being cached.
	 * @return int The timestamp when the cache should expire.
	 */
	public static function get_cache_end_date_by_status( $status ) {
		if ( ! is_object( $status ) || empty( $status->last_checked ) ) {
			return time() + static::INITIAL_OPTION_EXPIRES_AFTER;
		}
		return time() + static::OPTION_EXPIRES_AFTER;
	}

/**
	 * Delete the cached status and its timestamp
	 *
	 * @return bool Whether all related status options were successfully deleted.
	 */
	public static function delete_option() {
		$option_deleted           = delete_option( static::OPTION_NAME );
		$option_timestamp_deleted = delete_option( static::OPTION_TIMESTAMP_NAME );

return $option_deleted && $option_timestamp_deleted;
	}

/**
	 * Checks the current status to see if there are any threats found
	 *
	 * @return boolean
	 */
	public static function has_threats() {
		return 0 < self::get_total_threats();
	}

/**
	 * Gets the total number of threats found
	 *
	 * @return integer
	 */
	public static function get_total_threats() {
		$status = static::get_status();
		return isset( $status->num_threats ) && is_int( $status->num_threats ) ? $status->num_threats : 0;
	}

/**
	 * Get all threats combined
	 *
	 * @return array
	 */
	public static function get_all_threats() {
		return array_merge(
			self::get_wordpress_threats(),
			self::get_themes_threats(),
			self::get_plugins_threats(),
			self::get_files_threats(),
			self::get_database_threats()
		);
	}

/**
	 * Get threats found for WordPress core
	 *
	 * @return array
	 */
	public static function get_wordpress_threats() {
		return self::get_threats( 'core' );
	}

/**
	 * Get threats found for themes
	 *
	 * @return array
	 */
	public static function get_themes_threats() {
		return self::get_threats( 'themes' );
	}

/**
	 * Get threats found for plugins
	 *
	 * @return array
	 */
	public static function get_plugins_threats() {
		return self::get_threats( 'plugins' );
	}

/**
	 * Get threats found for files
	 *
	 * @return array
	 */
	public static function get_files_threats() {
		return self::get_threats( 'files' );
	}

/**
	 * Get threats found for plugins
	 *
	 * @return array
	 */
	public static function get_database_threats() {
		return self::get_threats( 'database' );
	}

/**
	 * Get the threats for one type of extension or core
	 *
	 * @param string $type What threats you want to get. Possible values are 'core', 'themes' and 'plugins'.
	 *
	 * @return array
	 */
	public static function get_threats( $type ) {
		$status = static::get_status();

if ( 'core' === $type ) {
			return isset( $status->$type ) && ! empty( $status->$type->threats ) ? $status->$type->threats : array();
		}

if ( 'files' === $type || 'database' === $type ) {
			return isset( $status->$type ) && ! empty( $status->$type ) ? $status->$type : array();
		}

$threats = array();
		if ( isset( $status->$type ) ) {
			foreach ( (array) $status->$type as $item ) {
				if ( ! empty( $item->threats ) ) {
					$threats = array_merge( $threats, $item->threats );
				}
			}
		}
		return $threats;
	}

/**
	 * Check if the WordPress version that was checked matches the current installed version.
	 *
	 * @param object $core_check The object returned by Protect wpcom endpoint.
	 * @return object The object representing the current status of core checks.
	 */
	protected static function normalize_core_information( $core_check ) {
		global $wp_version;

$core = new Extension_Model(
			array(
				'type'    => 'core',
				'name'    => 'WordPress',
				'version' => $wp_version,
				'checked' => false,
			)
		);

if ( isset( $core_check->version ) && $core_check->version === $wp_version ) {
			if ( is_array( $core_check->vulnerabilities ) ) {
				$core->checked = true;
				$core->set_threats( $core_check->vulnerabilities );
			}
		}

return $core;
	}

/**
	 * Sort By Threats
	 *
	 * @param array<object> $threats Array of threats to sort.
	 *
	 * @return array<object> The sorted $threats array.
	 */
	protected static function sort_threats( $threats ) {
		usort(
			$threats,
			function ( $a, $b ) {
				// sort primarily based on the presence of threats
				$ret = empty( $a->threats ) <=> empty( $b->threats );

// sort secondarily on whether the item has been checked
				if ( ! $ret ) {
					$ret = $a->checked <=> $b->checked;
				}

return $ret;
			}
		);

return $threats;
	}
}

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