/**
 * 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:// example.com / members / andy / [current_component] / [current_action] / [action_variables] / [action_variables] / ...
 *   - OUTSIDE ROOT: http:// example.com / sites / buddypress / members / andy / [current_component] / [current_action] / [action_variables] / [action_variables] / ...
 *
 *	Example:
 *    - http://example.com/members/andy/profile/edit/group/5/
 *    - $bp->current_component: string 'xprofile'
 *    - $bp->current_action: string 'edit'
 *    - $bp->action_variables: array ['group', 5]
 *
 * @since 1.0.0
 */
function bp_core_set_uri_globals()
{
    global $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;
    }
    $bp = buddypress();
    // 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_get_referer_path();
    } else {
        $path = esc_url($_SERVER['REQUEST_URI']);
    }
    /**
     * Filters the BuddyPress global URI path.
     *
     * @since 1.0.0
     *
     * @param string $path Path to set.
     */
    $path = apply_filters('bp_uri', $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.
//.........这里部分代码省略.........

/**
 * Check if the specified BuddyPress component directory is set to be the front page.
 *
 * Corresponds to the setting in wp-admin's Settings > Reading screen.
 *
 * @since 1.5.0
 *
 * @global int $current_blog WordPress global for the current blog.
 *
 * @param string $component Optional. Name of the component to check for.
 *                          Default: current component.
 * @return bool True if the specified component is set to be the site's front
 *              page, otherwise false.
 */
function bp_is_component_front_page($component = '')
{
    global $current_blog;
    $bp = buddypress();
    // Default to the current component if none is passed.
    if (empty($component)) {
        $component = bp_current_component();
    }
    // Get the path for the current blog/site.
    $path = is_main_site() ? bp_core_get_site_path() : $current_blog->path;
    // Get the front page variables.
    $show_on_front = get_option('show_on_front');
    $page_on_front = get_option('page_on_front');
    if ('page' !== $show_on_front || empty($component) || empty($bp->pages->{$component}) || $_SERVER['REQUEST_URI'] !== $path) {
        return false;
    }
    /**
     * Filters whether or not the specified BuddyPress component directory is set to be the front page.
     *
     * @since 1.5.0
     *
     * @param bool   $value     Whether or not the specified component directory is set as front page.
     * @param string $component Current component being checked.
     */
    return (bool) apply_filters('bp_is_component_front_page', $bp->pages->{$component}->id == $page_on_front, $component);
}

/**
 * Analyzes the URI structure and breaks it down into parts for use in code.
 * The idea is that BuddyPress can use complete custom friendly URI's without the
 * user having to add new re-write rules.
 *
 * Future custom components would then be able to use their own custom URI structure.
 *
 * @package BuddyPress Core
 * @since BuddyPress (r100)
 *
 * The URI's 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]
 *
 */
function bp_core_set_uri_globals()
{
    global $bp, $bp_unfiltered_uri, $bp_unfiltered_uri_offset;
    global $current_blog, $nxtdb;
    // Create global component, action, and item variables
    $bp->current_component = $bp->current_action = $bp->current_item = '';
    $bp->action_variables = $bp->displayed_user->id = '';
    // Don't catch URIs on non-root blogs unless multiblog mode is on
    if (!bp_is_root_blog() && !bp_is_multiblog_mode()) {
        return false;
    }
    // Fetch all the nxt page names for each component
    if (empty($bp->pages)) {
        $bp->pages = bp_core_get_directory_pages();
    }
    // Ajax or not?
    if (strpos($_SERVER['REQUEST_URI'], 'nxt-load.php')) {
        $path = bp_core_referrer();
    } else {
        $path = esc_url($_SERVER['REQUEST_URI']);
    }
    // Filter the path
    $path = apply_filters('bp_uri', $path);
    // Take GET variables off the URL to avoid problems,
    // they are still registered in the global $_GET variable
    if ($noget = substr($path, 0, strpos($path, '?'))) {
        $path = $noget;
    }
    // Fetch the 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]);
        }
    }
    // Running off blog other than root
    if (is_multisite() && !is_subdomain_install() && (bp_is_multiblog_mode() || 1 != bp_get_root_blog_id())) {
        // Any subdirectory names must be removed from $bp_uri.
        // This includes two cases: (1) when nxt is installed in a subdirectory,
        // and (2) when BP is running on secondary blog of a subdirectory
        // multisite installation. Phew!
        if ($chunks = explode('/', $current_blog->path)) {
            foreach ($chunks as $key => $chunk) {
                $bkey = array_search($chunk, $bp_uri);
                if ($bkey !== false) {
                    unset($bp_uri[$bkey]);
                }
                $bp_uri = array_values($bp_uri);
            }
        }
    }
    // Set the indexes, these are incresed by one if we are not on a VHOST install
    $component_index = 0;
    $action_index = $component_index + 1;
    // 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);
    }
    // Unset URI indices if they intersect with the paths
    foreach ((array) $bp_uri as $key => $uri_chunk) {
        if (in_array($uri_chunk, $paths)) {
            unset($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 $current_component is populated (unless a specific nxt post is being requested
    // via a URL parameter, usually signifying Preview mode)
    if ('page' == get_option('show_on_front') && get_option('page_on_front') && empty($bp_uri) && empty($_GET['p']) && empty($_GET['page_id'])) {
        $post = get_post(get_option('page_on_front'));
        if (!empty($post)) {
//.........这里部分代码省略.........

/**
 * Checks if the site's front page is set to the specified BuddyPress component
 * page in nxt-admin's Settings > Reading screen.
 *
 * @global object $bp Global BuddyPress settings object
 * @global $current_blog NXTClass global for the current blog
 * @param string $component Optional; Name of the component to check for.
 * @return bool True If the specified component is set to be the site's front page.
 * @since 1.5
 */
function bp_is_component_front_page($component = '')
{
    global $bp, $current_blog;
    if (!$component && !empty($bp->current_component)) {
        $component = $bp->current_component;
    }
    $path = is_main_site() ? bp_core_get_site_path() : $current_blog->path;
    if ('page' != get_option('show_on_front') || !$component || empty($bp->pages->{$component}) || $_SERVER['REQUEST_URI'] != $path) {
        return false;
    }
    return apply_filters('bp_is_component_front_page', $bp->pages->{$component}->id == get_option('page_on_front'), $component);
}

/**
 * bp_core_set_uri_globals()
 *
 * Analyzes the URI structure and breaks it down into parts for use in code.
 * The idea is that BuddyPress can use complete custom friendly URI's without the
 * user having to add new re-write rules.
 *
 * Future custom components would then be able to use their own custom URI structure.
 *
 * The URI's 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/
 *    - $current_component: string 'profile'
 *    - $current_action: string 'edit'
 *    - $action_variables: array ['group', 5]
 * 
 * @package BuddyPress Core
 */
function bp_core_set_uri_globals()
{
    global $current_component, $current_action, $action_variables;
    global $displayed_user_id;
    global $is_member_page, $is_new_friend;
    global $bp_unfiltered_uri;
    global $bp, $current_blog;
    /* Only catch URI's on the root blog */
    if (BP_ROOT_BLOG != (int) $current_blog->blog_id) {
        return false;
    }
    if (strpos($_SERVER['REQUEST_URI'], 'bp-core-ajax-handler.php')) {
        $path = bp_core_referrer();
    } else {
        $path = clean_url($_SERVER['REQUEST_URI']);
    }
    $path = apply_filters('bp_uri', $path);
    // Firstly, take GET variables off the URL to avoid problems,
    // they are still registered in the global $_GET variable */
    $noget = substr($path, 0, strpos($path, '?'));
    if ($noget != '') {
        $path = $noget;
    }
    /* Fetch the current URI and explode each part seperated by '/' into an array */
    $bp_uri = explode("/", $path);
    /* Take empties off the end of complete URI */
    if (empty($bp_uri[count($bp_uri) - 1])) {
        array_pop($bp_uri);
    }
    /* Take empties off the start of complete URI */
    if (empty($bp_uri[0])) {
        array_shift($bp_uri);
    }
    /* Get total URI segment count */
    $bp_uri_count = count($bp_uri) - 1;
    $is_member_page = false;
    /* Set the indexes, these are incresed by one if we are not on a VHOST install */
    $component_index = 0;
    $action_index = $component_index + 1;
    // If this is a WordPress page, return from the function.
    if (is_page($bp_uri[$component_index])) {
        return false;
    }
    /* 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);
    }
    for ($i = 0; $i < $bp_uri_count; $i++) {
        if (in_array($bp_uri[$i], $paths)) {
            unset($bp_uri[$i]);
        }
    }
    /* Reset the keys by merging with an empty array */
    $bp_uri = array_merge(array(), $bp_uri);
    $bp_unfiltered_uri = $bp_uri;
    /* Catch a member page and set the current member ID */
    if ($bp_uri[0] == BP_MEMBERS_SLUG || in_array('bp-core-ajax-handler.php', $bp_uri)) {
        $is_member_page = true;
        $is_root_component = true;
        // We are within a member page, set up user id globals
        $displayed_user_id = bp_core_get_displayed_userid($bp_uri[1]);
        unset($bp_uri[0]);
        unset($bp_uri[1]);
        // if the get variable 'new' is set this the first visit to a new friends profile.
        // this means we need to delete friend acceptance notifications, so we set a flag of is_new_friend.
        if (isset($_GET['new'])) {
            $is_new_friend = 1;
            unset($bp_uri[2]);
        }
        /* Reset the keys by merging with an empty array */
        $bp_uri = array_merge(array(), $bp_uri);
    }
    if (!isset($is_root_component)) {
//.........这里部分代码省略.........

/**
 * Check if the specified BuddyPress component directory is set to be the front page.
 *
 * Corresponds to the setting in wp-admin's Settings > Reading screen.
 *
 * @since BuddyPress (1.5.0)
 *
 * @global $current_blog WordPress global for the current blog.
 *
 * @param string $component Optional. Name of the component to check for.
 *                          Default: current component.
 * @return bool True if the specified component is set to be the site's front
 *              page, otherwise false.
 */
function bp_is_component_front_page($component = '')
{
    global $current_blog;
    $bp = buddypress();
    // Default to the current component if none is passed
    if (empty($component)) {
        $component = bp_current_component();
    }
    // Get the path for the current blog/site
    $path = is_main_site() ? bp_core_get_site_path() : $current_blog->path;
    // Get the front page variables
    $show_on_front = get_option('show_on_front');
    $page_on_front = get_option('page_on_front');
    if ('page' !== $show_on_front || empty($component) || empty($bp->pages->{$component}) || $_SERVER['REQUEST_URI'] !== $path) {
        return false;
    }
    return (bool) apply_filters('bp_is_component_front_page', $bp->pages->{$component}->id == $page_on_front, $component);
}

/**
 * bp_core_set_uri_globals()
 *
 * Analyzes the URI structure and breaks it down into parts for use in code.
 * The idea is that BuddyPress can use complete custom friendly URI's without the
 * user having to add new re-write rules.
 *
 * Future custom components would then be able to use their own custom URI structure.
 *
 * The URI's 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 'profile'
 *    - $bp->current_action: string 'edit'
 *    - $bp->action_variables: array ['group', 5]
 *
 * @package BuddyPress Core
 */
function bp_core_set_uri_globals()
{
    global $current_component, $current_action, $action_variables;
    global $displayed_user_id;
    global $is_member_page;
    global $bp_unfiltered_uri;
    global $bp, $current_blog;
    // Only catch URI's on the root blog if we are not running BP on multiple blogs
    if (!defined('BP_ENABLE_MULTIBLOG') && bp_core_is_multisite()) {
        if (BP_ROOT_BLOG != (int) $current_blog->blog_id) {
            return false;
        }
    }
    // Ajax or not?
    if (strpos($_SERVER['REQUEST_URI'], 'wp-load.php')) {
        $path = bp_core_referrer();
    } else {
        $path = esc_url($_SERVER['REQUEST_URI']);
    }
    $path = apply_filters('bp_uri', $path);
    // Take GET variables off the URL to avoid problems,
    // they are still registered in the global $_GET variable
    $noget = substr($path, 0, strpos($path, '?'));
    if ($noget != '') {
        $path = $noget;
    }
    // Fetch the 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]);
        }
    }
    // Running off blog other than root
    if (defined('BP_ENABLE_MULTIBLOG') || 1 != BP_ROOT_BLOG) {
        // Any subdirectory names must be removed from $bp_uri.
        // This includes two cases: (1) when WP is installed in a subdirectory,
        // and (2) when BP is running on secondary blog of a subdirectory
        // multisite installation. Phew!
        if ($chunks = explode('/', $current_blog->path)) {
            foreach ($chunks as $key => $chunk) {
                $bkey = array_search($chunk, $bp_uri);
                if ($bkey !== false) {
                    unset($bp_uri[$bkey]);
                }
                $bp_uri = array_values($bp_uri);
            }
        }
    }
    // Set the indexes, these are incresed by one if we are not on a VHOST install
    $component_index = 0;
    $action_index = $component_index + 1;
    // If this is a WordPress page, return from the function.
    if (is_page($bp_uri[$component_index])) {
        return false;
    }
    // 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);
    }
    foreach ((array) $bp_uri as $key => $uri_chunk) {
        if (in_array($uri_chunk, $paths)) {
            unset($bp_uri[$key]);
        }
    }
    // Reset the keys by merging with an empty array
    $bp_uri = array_merge(array(), $bp_uri);
    $bp_unfiltered_uri = $bp_uri;
    // If we are under anything with a members slug, set the correct globals
    if ($bp_uri[0] == BP_MEMBERS_SLUG) {
        $is_member_page = true;
        $is_root_component = true;
//.........这里部分代码省略.........

function bp_is_activity_front_page() {
	global $current_blog;

	if ( bp_core_is_main_site() )
		$path = bp_core_get_site_path();
	else
		$path = $current_blog->path;

	return ( 'page' == get_option('show_on_front') && 'activity' == get_option('page_on_front') && $_SERVER['REQUEST_URI'] == $path );
}