Ticket #5865: bp-core-catchuri.php

<?php

/**
 * BuddyPress URI catcher.
 *
 * Functions for parsing the URI and determining which BuddyPress template file
 * to use on-screen.
 *
 * @package BuddyPress
 * @subpackage Core
 */

// Exit if accessed directly
if ( !defined( 'ABSPATH' ) ) exit;

/**
 * Analyze the URI and break it down into BuddyPress-usable chunks.
 *
 * BuddyPress can use complete custom friendly URIs without the user having to
 * add new rewrite rules. Custom components are able to use their own custom
 * URI structures with very little work.
 *
 * The URIs are broken down as follows:
 *   - http:// domain.com / members / andy / [current_component] / [current_action] / [action_variables] / [action_variables] / ...
 *   - OUTSIDE ROOT: http:// domain.com / sites / buddypress / members / andy / [current_component] / [current_action] / [action_variables] / [action_variables] / ...
 *
 *      Example:
 *    - http://domain.com/members/andy/profile/edit/group/5/
 *    - $bp->current_component: string 'xprofile'
 *    - $bp->current_action: string 'edit'
 *    - $bp->action_variables: array ['group', 5]
 *
 * @since BuddyPress (1.0.0)
 */
function bp_core_set_uri_globals() {
        global $bp, $current_blog, $wp_rewrite;

        // Don't catch URIs on non-root blogs unless multiblog mode is on
        if ( !bp_is_root_blog() && !bp_is_multiblog_mode() )
                return false;

        // Define local variables
        $root_profile = $match   = false;
        $key_slugs    = $matches = $uri_chunks = array();

        // Fetch all the WP page names for each component
        if ( empty( $bp->pages ) )
                $bp->pages = bp_core_get_directory_pages();

        // Ajax or not?
        if ( defined( 'DOING_AJAX' ) && DOING_AJAX || strpos( $_SERVER['REQUEST_URI'], 'wp-load.php' ) )
                $path = bp_core_referrer();
        else
                $path = esc_url( $_SERVER['REQUEST_URI'] );

        // Filter the path
        $path = apply_filters( 'bp_uri', $path );

    // Force lowercase for correct match comparison when there are encoded url slugs
    $path = strtolower($path);

        // Take GET variables off the URL to avoid problems
        $path = strtok( $path, '?' );

        // Fetch current URI and explode each part separated by '/' into an array
        $bp_uri = explode( '/', $path );

        // Loop and remove empties
        foreach ( (array) $bp_uri as $key => $uri_chunk ) {
                if ( empty( $bp_uri[$key] ) ) {
                        unset( $bp_uri[$key] );
                }
        }

        // If running off blog other than root, any subdirectory names must be
        // removed from $bp_uri. This includes two cases:
        //
        //    1. when WP is installed in a subdirectory,
        //    2. when BP is running on secondary blog of a subdirectory
        //       multisite installation. Phew!
        if ( is_multisite() && !is_subdomain_install() && ( bp_is_multiblog_mode() || 1 != bp_get_root_blog_id() ) ) {

                // Blow chunks
                $chunks = explode( '/', $current_blog->path );

                // If chunks exist...
                if ( !empty( $chunks ) ) {

                        // ...loop through them...
                        foreach( $chunks as $key => $chunk ) {
                                $bkey = array_search( $chunk, $bp_uri );

                                // ...and unset offending keys
                                if ( false !== $bkey ) {
                                        unset( $bp_uri[$bkey] );
                                }

                                $bp_uri = array_values( $bp_uri );
                        }
                }
        }

        // Get site path items
        $paths = explode( '/', bp_core_get_site_path() );

        // Take empties off the end of path
        if ( empty( $paths[count( $paths ) - 1] ) )
                array_pop( $paths );

        // Take empties off the start of path
        if ( empty( $paths[0] ) )
                array_shift( $paths );

        // Reset indexes
        $bp_uri = array_values( $bp_uri );
        $paths  = array_values( $paths );

        // Unset URI indices if they intersect with the paths
        foreach ( (array) $bp_uri as $key => $uri_chunk ) {
                if ( isset( $paths[$key] ) && $uri_chunk == $paths[$key] ) {
                        unset( $bp_uri[$key] );
                }
        }

        // Reset the keys by merging with an empty array
        $bp_uri = array_merge( array(), $bp_uri );

        // If a component is set to the front page, force its name into $bp_uri
        // so that $current_component is populated (unless a specific WP post is being requested
        // via a URL parameter, usually signifying Preview mode)
        if ( 'page' == get_option( 'show_on_front' ) && get_option( 'page_on_front' ) && empty( $bp_uri ) && empty( $_GET['p'] ) && empty( $_GET['page_id'] ) ) {
                $post = get_post( get_option( 'page_on_front' ) );
                if ( !empty( $post ) ) {
                        $bp_uri[0] = $post->post_name;
                }
        }

        // Keep the unfiltered URI safe
        $bp->unfiltered_uri = $bp_uri;

        // Don't use $bp_unfiltered_uri, this is only for backpat with old plugins. Use $bp->unfiltered_uri.
        $GLOBALS['bp_unfiltered_uri'] = &$bp->unfiltered_uri;

        // Get slugs of pages into array
        foreach ( (array) $bp->pages as $page_key => $bp_page )
                $key_slugs[$page_key] = trailingslashit( '/' . $bp_page->slug );

        // Bail if keyslugs are empty, as BP is not setup correct
        if ( empty( $key_slugs ) )
                return;

        // Loop through page slugs and look for exact match to path
        foreach ( $key_slugs as $key => $slug ) {
                if ( $slug == $path ) {
                        $match      = $bp->pages->{$key};
                        $match->key = $key;
                        $matches[]  = 1;
                        break;
                }
        }

        // No exact match, so look for partials
        if ( empty( $match ) ) {

                // Loop through each page in the $bp->pages global
                foreach ( (array) $bp->pages as $page_key => $bp_page ) {

                        // Look for a match (check members first)
                        if ( in_array( $bp_page->name, (array) $bp_uri ) ) {

                                // Match found, now match the slug to make sure.
                                $uri_chunks = explode( '/', $bp_page->slug );

                                // Loop through uri_chunks
                                foreach ( (array) $uri_chunks as $key => $uri_chunk ) {

                                        // Make sure chunk is in the correct position
                                        if ( !empty( $bp_uri[$key] ) && ( $bp_uri[$key] == $uri_chunk ) ) {
                                                $matches[] = 1;

                                        // No match
                                        } else {
                                                $matches[] = 0;
                                        }
                                }

                                // Have a match
                                if ( !in_array( 0, (array) $matches ) ) {
                                        $match      = $bp_page;
                                        $match->key = $page_key;
                                        break;
                                };

                                // Unset matches
                                unset( $matches );
                        }

                        // Unset uri chunks
                        unset( $uri_chunks );
                }
        }

        // URLs with BP_ENABLE_ROOT_PROFILES enabled won't be caught above
        if ( empty( $matches ) && bp_core_enable_root_profiles() ) {

                // Switch field based on compat
                $field = bp_is_username_compatibility_mode() ? 'login' : 'slug';

                // Make sure there's a user corresponding to $bp_uri[0]
                if ( !empty( $bp->pages->members ) && !empty( $bp_uri[0] ) && $root_profile = get_user_by( $field, $bp_uri[0] ) ) {

                        // Force BP to recognize that this is a members page
                        $matches[]  = 1;
                        $match      = $bp->pages->members;
                        $match->key = 'members';
                }
        }

        // Search doesn't have an associated page, so we check for it separately
        if ( !empty( $bp_uri[0] ) && ( bp_get_search_slug() == $bp_uri[0] ) ) {
                $matches[]   = 1;
                $match       = new stdClass;
                $match->key  = 'search';
                $match->slug = bp_get_search_slug();
        }

        // This is not a BuddyPress page, so just return.
        if ( empty( $matches ) )
                return false;

        $wp_rewrite->use_verbose_page_rules = false;

        // Find the offset. With $root_profile set, we fudge the offset down so later parsing works
        $slug       = !empty ( $match ) ? explode( '/', $match->slug ) : '';
        $uri_offset = empty( $root_profile ) ? 0 : -1;

        // Rejig the offset
        if ( !empty( $slug ) && ( 1 < count( $slug ) ) ) {
                array_pop( $slug );
                $uri_offset = count( $slug );
        }

        // Global the unfiltered offset to use in bp_core_load_template().
        // To avoid PHP warnings in bp_core_load_template(), it must always be >= 0
        $bp->unfiltered_uri_offset = $uri_offset >= 0 ? $uri_offset : 0;

        // We have an exact match
        if ( isset( $match->key ) ) {

                // Set current component to matched key
                $bp->current_component = $match->key;

                // If members component, do more work to find the actual component
                if ( 'members' == $match->key ) {

                        // Viewing a specific user
                        if ( !empty( $bp_uri[$uri_offset + 1] ) ) {

                                // Switch the displayed_user based on compatbility mode
                                if ( bp_is_username_compatibility_mode() ) {
                                        $bp->displayed_user->id = (int) bp_core_get_userid( urldecode( $bp_uri[$uri_offset + 1] ) );
                                } else {
                                        $bp->displayed_user->id = (int) bp_core_get_userid_from_nicename( urldecode( $bp_uri[$uri_offset + 1] ) );
                                }

                                if ( !bp_displayed_user_id() ) {

                                        // Prevent components from loading their templates
                                        $bp->current_component = '';

                                        bp_do_404();
                                        return;
                                }

                                // If the displayed user is marked as a spammer, 404 (unless logged-
                                // in user is a super admin)
                                if ( bp_displayed_user_id() && bp_is_user_spammer( bp_displayed_user_id() ) ) {
                                        if ( bp_current_user_can( 'bp_moderate' ) ) {
                                                bp_core_add_message( __( 'This user has been marked as a spammer. Only site admins can view this profile.', 'buddypress' ), 'warning' );
                                        } else {
                                                bp_do_404();
                                                return;
                                        }
                                }

                                // Bump the offset
                                if ( isset( $bp_uri[$uri_offset + 2] ) ) {
                                        $bp_uri                = array_merge( array(), array_slice( $bp_uri, $uri_offset + 2 ) );
                                        $bp->current_component = $bp_uri[0];

                                // No component, so default will be picked later
                                } else {
                                        $bp_uri                = array_merge( array(), array_slice( $bp_uri, $uri_offset + 2 ) );
                                        $bp->current_component = '';
                                }

                                // Reset the offset
                                $uri_offset = 0;
                        }
                }
        }

        // Set the current action
        $bp->current_action = isset( $bp_uri[$uri_offset + 1] ) ? $bp_uri[$uri_offset + 1] : '';

        // Slice the rest of the $bp_uri array and reset offset
        $bp_uri      = array_slice( $bp_uri, $uri_offset + 2 );
        $uri_offset  = 0;

        // Set the entire URI as the action variables, we will unset the current_component and action in a second
        $bp->action_variables = $bp_uri;

        // Reset the keys by merging with an empty array
        $bp->action_variables = array_merge( array(), $bp->action_variables );
}

/**
 * Are root profiles enabled and allowed?
 *
 * @since BuddyPress (1.6.0)
 *
 * @return bool True if yes, false if no.
 */
function bp_core_enable_root_profiles() {

        $retval = false;

        if ( defined( 'BP_ENABLE_ROOT_PROFILES' ) && ( true == BP_ENABLE_ROOT_PROFILES ) )
                $retval = true;

        return apply_filters( 'bp_core_enable_root_profiles', $retval );
}

/**
 * Load a specific template file with fallback support.
 *
 * Example:
 *   bp_core_load_template( 'members/index' );
 * Loads:
 *   wp-content/themes/[activated_theme]/members/index.php
 *
 * @param array $templates Array of templates to attempt to load.
 * @return bool|null Returns false on failure.
 */
function bp_core_load_template( $templates ) {
        global $post, $bp, $wp_query, $wpdb;

        // Determine if the root object WP page exists for this request
        // note: get_page_by_path() breaks non-root pages
        if ( !empty( $bp->unfiltered_uri_offset ) ) {
                if ( !$page_exists = $wpdb->get_var( $wpdb->prepare( "SELECT ID FROM {$wpdb->posts} WHERE post_name = %s", $bp->unfiltered_uri[$bp->unfiltered_uri_offset] ) ) ) {
                        return false;
                }
        }

        // Set the root object as the current wp_query-ied item
        $object_id = 0;
        foreach ( (array) $bp->pages as $page ) {
                if ( $page->name == $bp->unfiltered_uri[$bp->unfiltered_uri_offset] ) {
                        $object_id = $page->id;
                }
        }

        // Make the queried/post object an actual valid page
        if ( !empty( $object_id ) ) {
                $wp_query->queried_object    = get_post( $object_id );
                $wp_query->queried_object_id = $object_id;
                $post                        = $wp_query->queried_object;
        }

        // Fetch each template and add the php suffix
        $filtered_templates = array();
        foreach ( (array) $templates as $template ) {
                $filtered_templates[] = $template . '.php';
        }

        // Filter the template locations so that plugins can alter where they are located
        $located_template = apply_filters( 'bp_located_template', locate_template( (array) $filtered_templates, false ), $filtered_templates );
        if ( !empty( $located_template ) ) {

                // Template was located, lets set this as a valid page and not a 404.
                status_header( 200 );
                $wp_query->is_page     = true;
                $wp_query->is_singular = true;
                $wp_query->is_404      = false;

                do_action( 'bp_core_pre_load_template', $located_template );

                load_template( apply_filters( 'bp_load_template', $located_template ) );

                do_action( 'bp_core_post_load_template', $located_template );

                // Kill any other output after this.
                exit();

        // No template found, so setup theme compatability
        // @todo Some other 404 handling if theme compat doesn't kick in
        } else {

                // We know where we are, so reset important $wp_query bits here early.
                // The rest will be done by bp_theme_compat_reset_post() later.
                if ( is_buddypress() ) {
                        status_header( 200 );
                        $wp_query->is_page     = true;
                        $wp_query->is_singular = true;
                        $wp_query->is_404      = false;
                }

                do_action( 'bp_setup_theme_compat' );
        }
}

/**
 * Redirect away from /profile URIs if XProfile is not enabled.
 */
function bp_core_catch_profile_uri() {
        if ( !bp_is_active( 'xprofile' ) ) {
                bp_core_load_template( apply_filters( 'bp_core_template_display_profile', 'members/single/home' ) );
        }
}

/**
 * Catch unauthorized access to certain BuddyPress pages and redirect accordingly.
 *
 * @since BuddyPress (1.5.0)
 */
function bp_core_catch_no_access() {
        global $bp, $wp_query;

        // If coming from bp_core_redirect() and $bp_no_status_set is true,
        // we are redirecting to an accessible page so skip this check.
        if ( !empty( $bp->no_status_set ) )
                return false;

        if ( !isset( $wp_query->queried_object ) && !bp_is_blog_page() ) {
                bp_do_404();
        }
}
add_action( 'bp_template_redirect', 'bp_core_catch_no_access', 1 );

/**
 * Redirect a user to log in for BP pages that require access control.
 *
 * Add an error message (if one is provided).
 *
 * If authenticated, redirects user back to requested content by default.
 *
 * @since BuddyPress (1.5.0)
 *
 * @param array $args {
 *     @type int $mode Specifies the destintation of the redirect. 1 will
 *           direct to the root domain (home page), which assumes you have a
 *           log-in form there; 2 directs to wp-login.php. Default: 2.
 *     @type string $redirect The URL the user will be redirected to after
 *           successfully logging in. Default: the URL originally requested.
 *     @type string $root The root URL of the site, used in case of error or
 *           mode 1 redirects. Default: the value of {@link bp_get_root_domain()}.
 *     @type string $message An error message to display to the user on the
 *           log-in page. Default: "You must log in to access the page you
 *           requested."
 * }
 */
function bp_core_no_access( $args = '' ) {

        // Build the redirect URL
        $redirect_url  = is_ssl() ? 'https://' : 'http://';
        $redirect_url .= $_SERVER['HTTP_HOST'];
        $redirect_url .= $_SERVER['REQUEST_URI'];

        $defaults = array(
                'mode'     => 2,                    // 1 = $root, 2 = wp-login.php
                'redirect' => $redirect_url,        // the URL you get redirected to when a user successfully logs in
                'root'     => bp_get_root_domain(),     // the landing page you get redirected to when a user doesn't have access
                'message'  => __( 'You must log in to access the page you requested.', 'buddypress' )
        );

        $r = wp_parse_args( $args, $defaults );
        $r = apply_filters( 'bp_core_no_access', $r );
        extract( $r, EXTR_SKIP );

        /**
         * @ignore Ignore these filters and use 'bp_core_no_access' above
         */
        $mode     = apply_filters( 'bp_no_access_mode',     $mode,     $root,     $redirect, $message );
        $redirect = apply_filters( 'bp_no_access_redirect', $redirect, $root,     $message,  $mode    );
        $root     = apply_filters( 'bp_no_access_root',     $root,     $redirect, $message,  $mode    );
        $message  = apply_filters( 'bp_no_access_message',  $message,  $root,     $redirect, $mode    );
        $root     = trailingslashit( $root );

        switch ( $mode ) {

                // Option to redirect to wp-login.php
                // Error message is displayed with bp_core_no_access_wp_login_error()
                case 2 :
                        if ( !empty( $redirect ) ) {
                                bp_core_redirect( add_query_arg( array( 'action' => 'bpnoaccess' ), wp_login_url( $redirect ) ) );
                        } else {
                                bp_core_redirect( $root );
                        }

                        break;

                // Redirect to root with "redirect_to" parameter
                // Error message is displayed with bp_core_add_message()
                case 1 :
                default :

                        $url = $root;
                        if ( !empty( $redirect ) )
                                $url = add_query_arg( 'redirect_to', urlencode( $redirect ), $root );

                        if ( !empty( $message ) ) {
                                bp_core_add_message( $message, 'error' );
                        }

                        bp_core_redirect( $url );

                        break;
        }
}

/**
 * Add an error message to wp-login.php.
 *
 * Hooks into the "bpnoaccess" action defined in bp_core_no_access().
 *
 * @since BuddyPress (1.5.0)
 *
 * @global $error Error message to pass to wp-login.php
 */
function bp_core_no_access_wp_login_error() {
        global $error;

        $error = apply_filters( 'bp_wp_login_error', __( 'You must log in to access the page you requested.', 'buddypress' ), $_REQUEST['redirect_to'] );

        // shake shake shake!
        add_action( 'login_head', 'wp_shake_js', 12 );
}
add_action( 'login_form_bpnoaccess', 'bp_core_no_access_wp_login_error' );

/**
 * Canonicalize BuddyPress URLs.
 *
 * This function ensures that requests for BuddyPress content are always
 * redirected to their canonical versions. Canonical versions are always
 * trailingslashed, and are typically the most general possible versions of the
 * URL - eg, example.com/groups/mygroup/ instead of
 * example.com/groups/mygroup/home/.
 *
 * @since BuddyPress (1.6.0)
 *
 * @see BP_Members_Component::setup_globals() where
 *      $bp->canonical_stack['base_url'] and ['component'] may be set.
 * @see bp_core_new_nav_item() where $bp->canonical_stack['action'] may be set.
 * @uses bp_get_canonical_url()
 * @uses bp_get_requested_url()
 */
function bp_redirect_canonical() {
        global $bp;

        if ( !bp_is_blog_page() && apply_filters( 'bp_do_redirect_canonical', true ) ) {
                // If this is a POST request, don't do a canonical redirect.
                // This is for backward compatibility with plugins that submit form requests to
                // non-canonical URLs. Plugin authors should do their best to use canonical URLs in
                // their form actions.
                if ( !empty( $_POST ) ) {
                        return;
                }

                // build the URL in the address bar
                $requested_url  = bp_get_requested_url();

                // Stash query args
                $url_stack      = explode( '?', $requested_url );
                $req_url_clean  = $url_stack[0];
                $query_args     = isset( $url_stack[1] ) ? $url_stack[1] : '';

                $canonical_url  = bp_get_canonical_url();

                // Only redirect if we've assembled a URL different from the request
                if ( $canonical_url !== $req_url_clean ) {

                        // Template messages have been deleted from the cookie by this point, so
                        // they must be readded before redirecting
                        if ( isset( $bp->template_message ) ) {
                                $message      = stripslashes( $bp->template_message );
                                $message_type = isset( $bp->template_message_type ) ? $bp->template_message_type : 'success';

                                bp_core_add_message( $message, $message_type );
                        }

                        if ( !empty( $query_args ) ) {
                                $canonical_url .= '?' . $query_args;
                        }

                        bp_core_redirect( $canonical_url, 301 );
                }
        }
}

/**
 * Output rel=canonical header tag for BuddyPress content.
 *
 * @since BuddyPress (1.6.0)
 */
function bp_rel_canonical() {
        $canonical_url = bp_get_canonical_url();

        // Output rel=canonical tag
        echo "<link rel='canonical' href='" . esc_attr( $canonical_url ) . "' />\n";
}

/**
 * Get the canonical URL of the current page.
 *
 * @since BuddyPress (1.6.0)
 *
 * @uses apply_filters() Filter bp_get_canonical_url to modify return value.
 *
 * @param array $args {
 *     Optional array of arguments.
 *     @type bool $include_query_args Whether to include current URL arguments
 *           in the canonical URL returned from the function.
 * }
 * @return string Canonical URL for the current page.
 */
function bp_get_canonical_url( $args = array() ) {
        global $bp;

        // For non-BP content, return the requested url, and let WP do the work
        if ( bp_is_blog_page() ) {
                return bp_get_requested_url();
        }

        $defaults = array(
                'include_query_args' => false // Include URL arguments, eg ?foo=bar&foo2=bar2
        );
        $r = wp_parse_args( $args, $defaults );
        extract( $r );

        // Special case: when a BuddyPress directory (eg example.com/members)
        // is set to be the front page, ensure that the current canonical URL
        // is the home page URL.
        if ( 'page' == get_option( 'show_on_front' ) && $page_on_front = (int) get_option( 'page_on_front' ) ) {
                $front_page_component = array_search( $page_on_front, bp_core_get_directory_page_ids() );

                // If requesting the front page component directory, canonical
                // URL is the front page. We detect whether we're detecting a
                // component *directory* by checking that bp_current_action()
                // is empty - ie, this not a single item or a feed
                if ( false !== $front_page_component && bp_is_current_component( $front_page_component ) && ! bp_current_action() ) {
                        $bp->canonical_stack['canonical_url'] = trailingslashit( bp_get_root_domain() );

                // Except when the front page is set to the registration page
                // and the current user is logged in. In this case we send to
                // the members directory to avoid redirect loops
                } else if ( bp_is_register_page() && 'register' == $front_page_component && is_user_logged_in() ) {
                        $bp->canonical_stack['canonical_url'] = apply_filters( 'bp_loggedin_register_page_redirect_to', trailingslashit( bp_get_root_domain() . '/' . bp_get_members_root_slug() ) );
                }
        }

        if ( empty( $bp->canonical_stack['canonical_url'] ) ) {
                // Build the URL in the address bar
                $requested_url  = bp_get_requested_url();

                // Stash query args
                $url_stack      = explode( '?', $requested_url );

                // Build the canonical URL out of the redirect stack
                if ( isset( $bp->canonical_stack['base_url'] ) )
                        $url_stack[0] = $bp->canonical_stack['base_url'];

                if ( isset( $bp->canonical_stack['component'] ) )
                        $url_stack[0] = trailingslashit( $url_stack[0] . $bp->canonical_stack['component'] );

                if ( isset( $bp->canonical_stack['action'] ) )
                        $url_stack[0] = trailingslashit( $url_stack[0] . $bp->canonical_stack['action'] );

                if ( !empty( $bp->canonical_stack['action_variables'] ) ) {
                        foreach( (array) $bp->canonical_stack['action_variables'] as $av ) {
                                $url_stack[0] = trailingslashit( $url_stack[0] . $av );
                        }
                }

                // Add trailing slash
                $url_stack[0] = trailingslashit( $url_stack[0] );

                // Stash in the $bp global
                $bp->canonical_stack['canonical_url'] = implode( '?', $url_stack );
        }

        $canonical_url = $bp->canonical_stack['canonical_url'];

        if ( !$include_query_args ) {
                $canonical_url = array_reverse( explode( '?', $canonical_url ) );
                $canonical_url = array_pop( $canonical_url );
        }

        return apply_filters( 'bp_get_canonical_url', $canonical_url, $args );
}

/**
 * Return the URL as requested on the current page load by the user agent.
 *
 * @since BuddyPress (1.6.0)
 *
 * @return string Requested URL string.
 */
function bp_get_requested_url() {
        global $bp;

        if ( empty( $bp->canonical_stack['requested_url'] ) ) {
                $bp->canonical_stack['requested_url']  = is_ssl() ? 'https://' : 'http://';
                $bp->canonical_stack['requested_url'] .= $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];
        }

        return apply_filters( 'bp_get_requested_url', $bp->canonical_stack['requested_url'] );
}

/**
 * Remove WP's canonical redirect when we are trying to load BP-specific content.
 *
 * Avoids issues with WordPress thinking that a BuddyPress URL might actually
 * be a blog post or page.
 *
 * This function should be considered temporary, and may be removed without
 * notice in future versions of BuddyPress.
 *
 * @since BuddyPress (1.6.0)
 *
 * @uses bp_is_blog_page()
 */
function _bp_maybe_remove_redirect_canonical() {
        if ( ! bp_is_blog_page() )
                remove_action( 'template_redirect', 'redirect_canonical' );
}
add_action( 'bp_init', '_bp_maybe_remove_redirect_canonical' );

/**
 * Rehook maybe_redirect_404() to run later than the default.
 *
 * WordPress's maybe_redirect_404() allows admins on a multisite installation
 * to define 'NOBLOGREDIRECT', a URL to which 404 requests will be redirected.
 * maybe_redirect_404() is hooked to template_redirect at priority 10, which
 * creates a race condition with bp_template_redirect(), our piggyback hook.
 * Due to a legacy bug in BuddyPress, internal BP content (such as members and
 * groups) is marked 404 in $wp_query until bp_core_load_template(), when BP
 * manually overrides the automatic 404. However, the race condition with
 * maybe_redirect_404() means that this manual un-404-ing doesn't happen in
 * time, with the results that maybe_redirect_404() thinks that the page is
 * a legitimate 404, and redirects incorrectly to NOBLOGREDIRECT.
 *
 * By switching maybe_redirect_404() to catch at a higher priority, we avoid
 * the race condition. If bp_core_load_template() runs, it dies before reaching
 * maybe_redirect_404(). If bp_core_load_template() does not run, it means that
 * the 404 is legitimate, and maybe_redirect_404() can proceed as expected.
 *
 * This function will be removed in a later version of BuddyPress. Plugins
 * (and plugin authors!) should ignore it.
 *
 * @since BuddyPress (1.6.1)
 *
 * @link http://buddypress.trac.wordpress.org/ticket/4329
 * @link http://buddypress.trac.wordpress.org/ticket/4415
 */
function _bp_rehook_maybe_redirect_404() {
        if ( defined( 'NOBLOGREDIRECT' ) ) {
                remove_action( 'template_redirect', 'maybe_redirect_404' );
                add_action( 'template_redirect', 'maybe_redirect_404', 100 );
        }
}
add_action( 'template_redirect', '_bp_rehook_maybe_redirect_404', 1 );

/**
 * Remove WP's rel=canonical HTML tag if we are trying to load BP-specific content.
 *
 * This function should be considered temporary, and may be removed without
 * notice in future versions of BuddyPress.
 *
 * @since BuddyPress (1.6.0)
 */
function _bp_maybe_remove_rel_canonical() {
        if ( ! bp_is_blog_page() && ! is_404() ) {
                remove_action( 'wp_head', 'rel_canonical' );
                add_action( 'bp_head', 'bp_rel_canonical' );
        }
}
add_action( 'wp_head', '_bp_maybe_remove_rel_canonical', 8 );