initial

wp-content/plugins/redirection/redirection-front.php

@@ -0,0 +1,157 @@
+<?php
+
+require_once __DIR__ . '/modules/wordpress.php';
+require_once __DIR__ . '/models/canonical.php';
+require_once __DIR__ . '/database/database-status.php';
+
+/**
+ * This powers all of the front-end redirecting
+ */
+class Redirection {
+	/**
+	 * Instance variable
+	 *
+	 * @var Redirection|null
+	 */
+	private static $instance = null;
+
+	/**
+	 * WordPress module
+	 *
+	 * @var WordPress_Module|false
+	 */
+	private $module = false;
+
+	/**
+	 * Singleton
+	 *
+	 * @return Redirection
+	 */
+	public static function init() {
+		if ( is_null( self::$instance ) ) {
+			self::$instance = new Redirection();
+		}
+
+		return self::$instance;
+	}
+
+	/**
+	 * Constructor
+	 */
+	public function __construct() {
+		if ( ! $this->can_start() ) {
+			return;
+		}
+
+		/** @var WordPress_Module|false */
+		$module = Red_Module::get( WordPress_Module::MODULE_ID );
+		$this->module = $module;
+		if ( $this->module !== false ) {
+			$this->module->start();
+		}
+
+		add_action( Red_Flusher::DELETE_HOOK, array( $this, 'clean_redirection_logs' ) );
+		add_filter( 'redirection_url_target', [ $this, 'transform_url' ] );
+
+		$options = Red_Options::get();
+		if ( $options['ip_logging'] === 0 ) {
+			add_filter( 'redirection_request_ip', array( $this, 'no_ip_logging' ) );
+		} elseif ( $options['ip_logging'] === 2 ) {
+			add_filter( 'redirection_request_ip', array( $this, 'mask_ip' ) );
+		}
+	}
+
+	/**
+	 * @param string $url
+	 * @return string
+	 */
+	public function transform_url( $url ) {
+		$transformer = new Red_Url_Transform();
+
+		return $transformer->transform( $url );
+	}
+
+	/**
+	 * Check if Redirection can run. We require the database to be installed.
+	 *
+	 * @return boolean
+	 */
+	public function can_start() {
+		$status = new Red_Database_Status();
+		if ( $status->needs_installing() ) {
+			return false;
+		}
+
+		return true;
+	}
+
+	/**
+	 * Override the IP with an empty value
+	 *
+	 * @param string $ip IP.
+	 * @return string
+	 */
+	public function no_ip_logging( $ip ) {
+		return '';
+	}
+
+	/**
+	 * Override the IP with a masked IP
+	 *
+	 * @param string $ip IP.
+	 * @return string
+	 */
+	public function mask_ip( $ip ) {
+		$ip = trim( $ip );
+
+		if ( strpos( $ip, ':' ) !== false ) {
+			$packed = inet_pton( trim( $ip ) );
+			if ( $packed === false ) {
+				return '';
+			}
+
+			// Mask lower 64 bits of the IPv6 address (keep the upper 64 bits).
+			$mask = str_repeat( "\xff", 8 ) . str_repeat( "\x00", 8 );
+			$masked = $packed & $mask;
+			$converted = inet_ntop( $masked );
+			if ( $converted === false ) {
+				return '';
+			}
+
+			return $converted;
+		}
+
+		$parts = [];
+		if ( strlen( $ip ) > 0 ) {
+			$parts = explode( '.', $ip );
+		}
+
+		if ( count( $parts ) > 0 ) {
+			$parts[ count( $parts ) - 1 ] = 0;
+		}
+
+		return implode( '.', $parts );
+	}
+
+	/**
+	 * Hook to flush the logs
+	 *
+	 * @return void
+	 */
+	public function clean_redirection_logs() {
+		$flusher = new Red_Flusher();
+		$flusher->flush();
+	}
+
+	/**
+	 * Used for unit tests
+	 *
+	 * @return WordPress_Module|false
+	 */
+	public function get_module() {
+		return $this->module;
+	}
+}
+
+// @phpstan-ignore return.void
+add_action( 'plugins_loaded', array( 'Redirection', 'init' ) );