<?php
/**
 * These functions are needed to load Multisite.
 *
 * @since 3.0.0
 *
 * @package WordPress
 * @subpackage Multisite
 */

/**
 * Whether a subdomain configuration is enabled.
 *
 * @since 3.0.0
 *
 * @return bool True if subdomain configuration is enabled, false otherwise.
 */
function is_subdomain_install() {
	if ( defined('SUBDOMAIN_INSTALL') )
		return SUBDOMAIN_INSTALL;

	if ( defined('VHOST') && VHOST == 'yes' )
		return true;

	return false;
}

/**
 * Checks status of current blog.
 *
 * Checks if the blog is deleted, inactive, archived, or spammed.
 *
 * Dies with a default message if the blog does not pass the check.
 *
 * To change the default message when a blog does not pass the check,
 * use the wp-content/blog-deleted.php, blog-inactive.php and
 * blog-suspended.php drop-ins.
 *
 * @return bool|string Returns true on success, or drop-in file to include.
 */
function ms_site_check() {
	global $wpdb, $current_blog;

	// Allow short-circuiting
	$check = apply_filters('ms_site_check', null);
	if ( null !== $check )
		return true;

	// Allow super admins to see blocked sites
	if ( is_super_admin() )
		return true;

	if ( '1' == $current_blog->deleted ) {
		if ( file_exists( WP_CONTENT_DIR . '/blog-deleted.php' ) ) {
			return WP_CONTENT_DIR . '/blog-deleted.php';
		} else {
			header( 'HTTP/1.1 410 Gone' );
			wp_die( /*WP_I18N_USER_DELETED_BLOG*/'ユーザーがアカウントを削除したためコンテンツは表示できなくなっています。'/*/WP_I18N_USER_DELETED_BLOG*/ );
		}
	}

	if ( '2' == $current_blog->deleted ) {
		if ( file_exists( WP_CONTENT_DIR . '/blog-inactive.php' ) )
			return WP_CONTENT_DIR . '/blog-inactive.php';
		else
			wp_die( sprintf( /*WP_I18N_BLOG_NOT_ACTIVATED*/'このサイトはまだ有効化されていません。有効化がうまくいかないときは、<a href="mailto:%1$s">%1$s</a> までお問い合わせください。'/*/WP_I18N_BLOG_NOT_ACTIVATED*/, str_replace( '@', ' AT ', get_site_option( 'admin_email', "support@{$current_site->domain}" ) ) ) );
	}

	if ( $current_blog->archived == '1' || $current_blog->spam == '1' ) {
		if ( file_exists( WP_CONTENT_DIR . '/blog-suspended.php' ) ) {
			return WP_CONTENT_DIR . '/blog-suspended.php';
		} else {
			header( 'HTTP/1.1 410 Gone' );
			wp_die( /*WP_I18N_ARCHIVED*/'このサイトはアーカイブに保存されたか利用停止中になっています。'/*/WP_I18N_ARCHIVED*/ );
		}
	}

	return true;
}

/**
 * Sets current site name.
 *
 * @access private
 * @since 3.0.0
 * @return object $current_site object with site_name
 */
function get_current_site_name( $current_site ) {
	global $wpdb;
	$current_site->site_name = wp_cache_get( $current_site->id . ':current_site_name', 'site-options' );
	if ( ! $current_site->site_name ) {
		$current_site->site_name = wp_cache_get( $current_site->id . ':site_name', 'site-options' );
		if ( ! $current_site->site_name ) {
			$current_site->site_name = $wpdb->get_var( $wpdb->prepare( "SELECT meta_value FROM $wpdb->sitemeta WHERE site_id = %d AND meta_key = 'site_name'", $current_site->id ) );
			if ( ! $current_site->site_name )
				$current_site->site_name = ucfirst( $current_site->domain );
		}
		wp_cache_set( $current_site->id . ':current_site_name', $current_site->site_name, 'site-options' );
	}
	return $current_site;
}

/**
 * Sets current_site object.
 *
 * @access private
 * @since 3.0.0
 * @return object $current_site object
 */
function wpmu_current_site() {
	global $wpdb, $current_site, $domain, $path, $sites, $cookie_domain;
	if ( defined( 'DOMAIN_CURRENT_SITE' ) && defined( 'PATH_CURRENT_SITE' ) ) {
		$current_site->id = defined( 'SITE_ID_CURRENT_SITE' ) ? SITE_ID_CURRENT_SITE : 1;
		$current_site->domain = DOMAIN_CURRENT_SITE;
		$current_site->path   = $path = PATH_CURRENT_SITE;
		if ( defined( 'BLOG_ID_CURRENT_SITE' ) )
			$current_site->blog_id = BLOG_ID_CURRENT_SITE;
		elseif ( defined( 'BLOGID_CURRENT_SITE' ) ) // deprecated.
			$current_site->blog_id = BLOGID_CURRENT_SITE;
		if ( DOMAIN_CURRENT_SITE == $domain )
			$current_site->cookie_domain = $cookie_domain;
		elseif ( substr( $current_site->domain, 0, 4 ) == 'www.' )
			$current_site->cookie_domain = substr( $current_site->domain, 4 );
		else
			$current_site->cookie_domain = $current_site->domain;

		wp_load_core_site_options( $current_site->id );

		return $current_site;
	}

	$current_site = wp_cache_get( 'current_site', 'site-options' );
	if ( $current_site )
		return $current_site;

	$sites = $wpdb->get_results( "SELECT * FROM $wpdb->site" ); // usually only one site
	if ( 1 == count( $sites ) ) {
		$current_site = $sites[0];
		wp_load_core_site_options( $current_site->id );
		$path = $current_site->path;
		$current_site->blog_id = $wpdb->get_var( $wpdb->prepare( "SELECT blog_id FROM $wpdb->blogs WHERE domain = %s AND path = %s", $current_site->domain, $current_site->path ) );
		$current_site = get_current_site_name( $current_site );
		if ( substr( $current_site->domain, 0, 4 ) == 'www.' )
			$current_site->cookie_domain = substr( $current_site->domain, 4 );
		wp_cache_set( 'current_site', $current_site, 'site-options' );
		return $current_site;
	}
	$path = substr( $_SERVER[ 'REQUEST_URI' ], 0, 1 + strpos( $_SERVER[ 'REQUEST_URI' ], '/', 1 ) );

	if ( $domain == $cookie_domain )
		$current_site = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->site WHERE domain = %s AND path = %s", $domain, $path ) );
	else
		$current_site = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->site WHERE domain IN ( %s, %s ) AND path = %s ORDER BY CHAR_LENGTH( domain ) DESC LIMIT 1", $domain, $cookie_domain, $path ) );

	if ( ! $current_site ) {
		if ( $domain == $cookie_domain )
			$current_site = $wpdb->get_row( $wpdb->prepare("SELECT * FROM $wpdb->site WHERE domain = %s AND path='/'", $domain ) );
		else
			$current_site = $wpdb->get_row( $wpdb->prepare("SELECT * FROM $wpdb->site WHERE domain IN ( %s, %s ) AND path = '/' ORDER BY CHAR_LENGTH( domain ) DESC LIMIT 1", $domain, $cookie_domain, $path ) );
	}

	if ( $current_site ) {
		$path = $current_site->path;
		$current_site->cookie_domain = $cookie_domain;
		return $current_site;
	}

	if ( is_subdomain_install() ) {
		$sitedomain = substr( $domain, 1 + strpos( $domain, '.' ) );
		$current_site = $wpdb->get_row( $wpdb->prepare("SELECT * FROM $wpdb->site WHERE domain = %s AND path = %s", $sitedomain, $path) );
		if ( $current_site ) {
			$current_site->cookie_domain = $current_site->domain;
			return $current_site;
		}

		$current_site = $wpdb->get_row( $wpdb->prepare("SELECT * FROM $wpdb->site WHERE domain = %s AND path='/'", $sitedomain) );
	}

	if ( $current_site || defined( 'WP_INSTALLING' ) ) {
		$path = '/';
		return $current_site;
	}

	// Still no dice.
	// @todo Update or remove WPMU codex link.
	if ( 1 == count( $sites ) )
		wp_die( sprintf( /*WP_I18N_BLOG_DOESNT_EXIST*/'そのサイトは存在しません。<a href="%s">%s</a> をお試しください。'/*/WP_I18N_BLOG_DOESNT_EXIST*/, $sites[0]->domain . $sites[0]->path ) );
	else
		wp_die( /*WP_I18N_NO_SITE_DEFINED*/'このホスト上ではサイトが定義されていません。もしあなたがサイトの所有者の場合は、<a href="http://wpdocs.sourceforge.jp/Debugging_WPMU">デバッグ用ドキュメンテーション</a>のヘルプをご覧ください。'/*/WP_I18N_NO_SITE_DEFINED*/ );
}

/**
 * Displays a failure message.
 *
 * Used when a blog's tables do not exist. Checks for a missing $wpdb->site table as well.
 *
 * @todo update Codex link for 3.0.0
 *
 * @access private
 * @since 3.0.0
 */
function ms_not_installed() {
	global $wpdb, $domain, $path;

	$title = /*WP_I18N_FATAL_ERROR*/'データベース接続確立エラー'/*/WP_I18N_FATAL_ERROR*/;
	$msg  = '<h1>' . $title . '</h1>';
	if ( ! is_admin() )
		die( $msg );
	$msg .= '<p>' . /*WP_I18N_CONTACT_OWNER*/'サイトが表示されない場合は、このサイトネットワークの所有者に管理してください。'/*/WP_I18N_CONTACT_OWNER*/ . '';
	$msg .= ' ' . /*WP_I18N_CHECK_MYSQL*/'もしあなたがこのネットワークの保有者の場合、MySQL が正しく動作していて、テーブルにエラーがないかご確認ください。'/*/WP_I18N_CHECK_MYSQL*/ . '</p>';
	if ( false && !$wpdb->get_var( "SHOW TABLES LIKE '$wpdb->site'" ) )
		$msg .= '<p>' . sprintf( /*WP_I18N_TABLES_MISSING_LONG*/'<strong>データベーステーブルがありません。</strong>MySQL が起動していないか、WordPress が正しくインストールされていないか、<code>%s</code> が削除されています。今すぐデータベースをチェックした方が良いでしょう。'/*/WP_I18N_TABLES_MISSING_LONG*/, $wpdb->site ) . '</p>';
	else
		$msg .= '<p>' . sprintf( /*WP_I18N_NO_SITE_FOUND*/'<strong>サイト <code>%1$s</code> が見つかりませんでした。</strong> <code>%2$s</code> データベース内で <code>%3$s</code> テーブルを検索しましたが、これで間違いありませんか ?'/*/WP_I18N_NO_SITE_FOUND*/, rtrim( $domain . $path, '/' ), $wpdb->blogs, DB_NAME ) . '</p>';
	$msg .= '<p><strong>' . /*WP_I18N_WHAT_DO_I_DO*/'What do I do now?'/*WP_I18N_WHAT_DO_I_DO*/ . '</strong> ';
	$msg .= /*WP_I18N_RTFM*/'<a target="_blank" href="http://wpdocs.sourceforge.jp/Debugging_WPMU">バグリポート</a>ページをご覧ください。ガイドラインに従えば、問題点の解決に役に立つかもしれません。'/*/WP_I18N_RTFM*/;
	$msg .= ' ' . /*WP_I18N_STUCK*/'このメッセージが表示され続ける場合は、データベースに以下のテーブルが含まれているか確認してください。'/*/WP_I18N_STUCK*/ . '</p><ul>';
	foreach ( $wpdb->tables('global') as $t => $table ) {
		if ( 'sitecategories' == $t )
			continue;
		$msg .= '<li>' . $table . '</li>';
	}
	$msg .= '</ul>';

	wp_die( $msg, $title );
}

?>