source: trunk/bp-core/bp-core-wpabstraction.php @ 2349

<?php
/*****
 * WordPress Abstraction
 *
 * The functions within this file will detect the version of WordPress you are running
 * and will alter the environment so BuddyPress can run regardless.
 *
 * The code below mostly contains function mappings. This code is subject to change once
 * the 3.0 WordPress version merge takes place.
 */

if ( !bp_core_is_multisite() ) {
        $wpdb->base_prefix = $wpdb->prefix;
        $wpdb->blogid = 1;
}

function bp_core_is_multisite() {
        if ( function_exists( 'is_multisite' ) )
                return is_multisite();

        if ( !function_exists( 'wpmu_signup_blog' ) )
                return false;

        return true;
}

function bp_core_get_status_sql( $prefix = false ) {
        if ( !bp_core_is_multisite() )
                return "{$prefix}user_status = 0";
        else
                return "{$prefix}spam = 0 AND {$prefix}deleted = 0 AND {$prefix}user_status = 0";
}

if ( !function_exists( 'get_blog_option' ) ) {
        function get_blog_option( $blog_id, $option_name, $default = false ) {
                return get_option( $option_name, $default );
        }
}

if ( !function_exists( 'add_blog_option' ) ) {
        function add_blog_option( $blog_id, $option_name, $option_value ) {
                return add_option( $option_name, $option_value );
        }
}

if ( !function_exists( 'update_blog_option' ) ) {
        function update_blog_option( $blog_id, $option_name, $option_value ) {
                return update_option( $option_name, $option_value );
        }
}

if ( !function_exists( 'switch_to_blog' ) ) {
        function switch_to_blog() {
                return 1;
        }
}

if ( !function_exists( 'restore_current_blog' ) ) {
        function restore_current_blog() {
                return 1;
        }
}

if ( !function_exists( 'get_blogs_of_user' ) ) {
        function get_blogs_of_user() {
                return false;
        }
}

if ( !function_exists( 'is_site_admin' ) ) {
        function is_site_admin() {
                if ( current_user_can( 'manage_options' ) )
                        return true;

                return false;
        }
}

if ( !function_exists( 'get_current_user_id' ) ) {
        function get_current_user_id() {
                global $current_user;
                get_currentuserinfo();
                return $current_user->data->ID;
        }
}

if ( !function_exists( 'update_blog_status' ) ) {
        function update_blog_status() {
                return true;
        }
}

if ( !function_exists( 'wpmu_validate_user_signup' ) ) {
        function wpmu_validate_user_signup( $user_name, $user_email ) {
                global $wpdb;

                $errors = new WP_Error();

                $user_name = preg_replace( "/\s+/", '', sanitize_user( $user_name, true ) );
                $user_email = sanitize_email( $user_email );

                if ( empty( $user_name ) )
                        $errors->add('user_name', __("Please enter a username"));

                $maybe = array();
                preg_match( "/[a-z0-9]+/", $user_name, $maybe );

                if( $user_name != $maybe[0] ) {
                    $errors->add('user_name', __("Only lowercase letters and numbers allowed"));
                }

                $illegal_names = get_site_option( "illegal_names" );
                if( is_array( $illegal_names ) == false ) {
                        $illegal_names = array(  "www", "web", "root", "admin", "main", "invite", "administrator" );
                        add_site_option( "illegal_names", $illegal_names );
                }
                if( in_array( $user_name, $illegal_names ) == true ) {
                    $errors->add('user_name',  __("That username is not allowed"));
                }

                if( strlen( $user_name ) < 4 ) {
                    $errors->add('user_name',  __("Username must be at least 4 characters"));
                }

                if ( strpos( " " . $user_name, "_" ) != false )
                        $errors->add('user_name', __("Sorry, usernames may not contain the character '_'!"));

                // all numeric?
                $match = array();
                preg_match( '/[0-9]*/', $user_name, $match );
                if ( $match[0] == $user_name )
                        $errors->add('user_name', __("Sorry, usernames must have letters too!"));

                if ( !is_email( $user_email ) )
                        $errors->add('user_email', __("Please check your email address."));

                $limited_email_domains = get_site_option( 'limited_email_domains' );
                if ( is_array( $limited_email_domains ) && empty( $limited_email_domains ) == false ) {
                        $emaildomain = substr( $user_email, 1 + strpos( $user_email, '@' ) );
                        if( in_array( $emaildomain, $limited_email_domains ) == false ) {
                                $errors->add('user_email', __("Sorry, that email address is not allowed!"));
                        }
                }

                // Check if the username has been used already.
                if ( username_exists($user_name) )
                        $errors->add('user_name', __("Sorry, that username already exists!"));

                // Check if the email address has been used already.
                if ( email_exists($user_email) )
                        $errors->add('user_email', __("Sorry, that email address is already used!"));

                $result = array('user_name' => $user_name, 'user_email' => $user_email, 'errors' => $errors);

                return apply_filters('wpmu_validate_user_signup', $result);
        }
}