<?php
/**
 * Defines constants and global variables that can be overridden, generally in wp-config.php.
 *
 * @package WordPress
 * @subpackage Multisite
 * @since 3.0.0
 */

/**
 * Defines Multisite upload constants.
 *
 * Exists for backward compatibility with legacy file-serving through
 * wp-includes/ms-files.php (wp-content/blogs.php in MU).
 *
 * @since 3.0.0
 */
function ms_upload_constants() {
    // This filter is attached in ms-default-filters.php but that file is not included during SHORTINIT.
    add_filter( 'default_site_option_ms_files_rewriting', '__return_true' );

    if ( ! get_site_option( 'ms_files_rewriting' ) ) {
        return;
    }

    // Base uploads dir relative to ABSPATH.
    if ( ! defined( 'UPLOADBLOGSDIR' ) ) {
        define( 'UPLOADBLOGSDIR', 'wp-content/blogs.dir' );
    }

    /*
     * Note, the main site in a post-MU network uses wp-content/uploads.
     * This is handled in wp_upload_dir() by ignoring UPLOADS for this case.
     */
    if ( ! defined( 'UPLOADS' ) ) {
        $site_id = get_current_blog_id();

        define( 'UPLOADS', UPLOADBLOGSDIR . '/' . $site_id . '/files/' );

        // Uploads dir relative to ABSPATH.
        if ( 'wp-content/blogs.dir' === UPLOADBLOGSDIR && ! defined( 'BLOGUPLOADDIR' ) ) {
            define( 'BLOGUPLOADDIR', WP_CONTENT_DIR . '/blogs.dir/' . $site_id . '/files/' );
        }
    }
}

/**
 * Defines Multisite cookie constants.
 *
 * @since 3.0.0
 */
function ms_cookie_constants() {
    $current_network = get_network();

    /**
     * @since 1.2.0
     */
    if ( ! defined( 'COOKIEPATH' ) ) {
        define( 'COOKIEPATH', $current_network->path );
    }

    /**
     * @since 1.5.0
     */
    if ( ! defined( 'SITECOOKIEPATH' ) ) {
        define( 'SITECOOKIEPATH', $current_network->path );
    }

    /**
     * @since 2.6.0
     */
    if ( ! defined( 'ADMIN_COOKIE_PATH' ) ) {
        $site_path = parse_url( get_option( 'siteurl' ), PHP_URL_PATH );
        if ( ! is_subdomain_install() || is_string( $site_path ) && trim( $site_path, '/' ) ) {
            define( 'ADMIN_COOKIE_PATH', SITECOOKIEPATH );
        } else {
            define( 'ADMIN_COOKIE_PATH', SITECOOKIEPATH . 'wp-admin' );
        }
    }

    /**
     * @since 2.0.0
     */
    if ( ! defined( 'COOKIE_DOMAIN' ) && is_subdomain_install() ) {
        if ( ! empty( $current_network->cookie_domain ) ) {
            define( 'COOKIE_DOMAIN', '.' . $current_network->cookie_domain );
        } else {
            define( 'COOKIE_DOMAIN', '.' . $current_network->domain );
        }
    }
}

/**
 * Defines Multisite file constants.
 *
 * Exists for backward compatibility with legacy file-serving through
 * wp-includes/ms-files.php (wp-content/blogs.php in MU).
 *
 * @since 3.0.0
 */
function ms_file_constants() {
    /**
     * Optional support for X-Sendfile header
     *
     * @since 3.0.0
     */
    if ( ! defined( 'WPMU_SENDFILE' ) ) {
        define( 'WPMU_SENDFILE', false );
    }

    /**
     * Optional support for X-Accel-Redirect header
     *
     * @since 3.0.0
     */
    if ( ! defined( 'WPMU_ACCEL_REDIRECT' ) ) {
        define( 'WPMU_ACCEL_REDIRECT', false );
    }
}

/**
 * Defines Multisite subdomain constants and handles warnings and notices.
 *
 * VHOST is deprecated in favor of SUBDOMAIN_INSTALL, which is a bool.
 *
 * On first call, the constants are checked and defined. On second call,
 * we will have translations loaded and can trigger warnings easily.
 *
 * @since 3.0.0
 */
function ms_subdomain_constants() {
    static $subdomain_error      = null;
    static $subdomain_error_warn = null;

    if ( false === $subdomain_error ) {
        return;
    }

    if ( $subdomain_error ) {
        $vhost_deprecated = sprintf(
            /* translators: 1: VHOST, 2: SUBDOMAIN_INSTALL, 3: wp-config.php, 4: is_subdomain_install() */
            __( 'The constant %1$s <strong>is deprecated</strong>. Use the boolean constant %2$s in %3$s to enable a subdomain configuration. Use %4$s to check whether a subdomain configuration is enabled.' ),
            '<code>VHOST</code>',
            '<code>SUBDOMAIN_INSTALL</code>',
            '<code>wp-config.php</code>',
            '<code>is_subdomain_install()</code>'
        );

        if ( $subdomain_error_warn ) {
            wp_trigger_error(
                __FUNCTION__,
                sprintf(
                    /* translators: 1: VHOST, 2: SUBDOMAIN_INSTALL */
                    __( '<strong>Conflicting values for the constants %1$s and %2$s.</strong> The value of %2$s will be assumed to be your subdomain configuration setting.' ),
                    '<code>VHOST</code>',
                    '<code>SUBDOMAIN_INSTALL</code>'
                ) . ' ' . $vhost_deprecated,
                E_USER_WARNING
            );
        } else {
            _deprecated_argument( 'define()', '3.0.0', $vhost_deprecated );
        }

        return;
    }

    if ( defined( 'SUBDOMAIN_INSTALL' ) && defined( 'VHOST' ) ) {
        $subdomain_error = true;
        if ( SUBDOMAIN_INSTALL !== ( 'yes' === VHOST ) ) {
            $subdomain_error_warn = true;
        }
    } elseif ( defined( 'SUBDOMAIN_INSTALL' ) ) {
        $subdomain_error = false;
        define( 'VHOST', SUBDOMAIN_INSTALL ? 'yes' : 'no' );
    } elseif ( defined( 'VHOST' ) ) {
        $subdomain_error = true;
        define( 'SUBDOMAIN_INSTALL', 'yes' === VHOST );
    } else {
        $subdomain_error = false;
        define( 'SUBDOMAIN_INSTALL', false );
        define( 'VHOST', 'no' );
    }
}