function friends_screen_requests()
{
    if (bp_is_action_variable('accept', 0) && is_numeric(bp_action_variable(1))) {
        // Check the nonce
        check_admin_referer('friends_accept_friendship');
        if (friends_accept_friendship(bp_action_variable(1))) {
            bp_core_add_message(__('Friendship accepted', 'buddypress'));
        } else {
            bp_core_add_message(__('Friendship could not be accepted', 'buddypress'), 'error');
        }
        bp_core_redirect(bp_loggedin_user_domain() . bp_current_component() . '/' . bp_current_action());
    } elseif (bp_is_action_variable('reject', 0) && is_numeric(bp_action_variable(1))) {
        // Check the nonce
        check_admin_referer('friends_reject_friendship');
        if (friends_reject_friendship(bp_action_variable(1))) {
            bp_core_add_message(__('Friendship rejected', 'buddypress'));
        } else {
            bp_core_add_message(__('Friendship could not be rejected', 'buddypress'), 'error');
        }
        bp_core_redirect(bp_loggedin_user_domain() . bp_current_component() . '/' . bp_current_action());
    }
    do_action('friends_screen_requests');
    if (isset($_GET['new'])) {
        bp_core_delete_notifications_by_type(bp_loggedin_user_id(), 'friends', 'friendship_request');
    }
    bp_core_load_template(apply_filters('friends_template_requests', 'members/single/home'));
}

/**
 * Catch and process the Requests page.
 */
function friends_screen_requests()
{
    if (bp_is_action_variable('accept', 0) && is_numeric(bp_action_variable(1))) {
        // Check the nonce
        check_admin_referer('friends_accept_friendship');
        if (friends_accept_friendship(bp_action_variable(1))) {
            bp_core_add_message(__('Friendship accepted', 'buddypress'));
        } else {
            bp_core_add_message(__('Friendship could not be accepted', 'buddypress'), 'error');
        }
        bp_core_redirect(trailingslashit(bp_loggedin_user_domain() . bp_current_component() . '/' . bp_current_action()));
    } elseif (bp_is_action_variable('reject', 0) && is_numeric(bp_action_variable(1))) {
        // Check the nonce
        check_admin_referer('friends_reject_friendship');
        if (friends_reject_friendship(bp_action_variable(1))) {
            bp_core_add_message(__('Friendship rejected', 'buddypress'));
        } else {
            bp_core_add_message(__('Friendship could not be rejected', 'buddypress'), 'error');
        }
        bp_core_redirect(trailingslashit(bp_loggedin_user_domain() . bp_current_component() . '/' . bp_current_action()));
    } elseif (bp_is_action_variable('cancel', 0) && is_numeric(bp_action_variable(1))) {
        // Check the nonce
        check_admin_referer('friends_withdraw_friendship');
        if (friends_withdraw_friendship(bp_loggedin_user_id(), bp_action_variable(1))) {
            bp_core_add_message(__('Friendship request withdrawn', 'buddypress'));
        } else {
            bp_core_add_message(__('Friendship request could not be withdrawn', 'buddypress'), 'error');
        }
        bp_core_redirect(trailingslashit(bp_loggedin_user_domain() . bp_current_component() . '/' . bp_current_action()));
    }
    do_action('friends_screen_requests');
    bp_core_load_template(apply_filters('friends_template_requests', 'members/single/home'));
}

/**
 * bp_groupblog_add_js()
 */
function bp_groupblog_add_js()
{
    if (bp_is_groups_component() && bp_is_action_variable('group-blog')) {
        if (file_exists(get_stylesheet_directory() . '/groupblog/js/general.js')) {
            wp_enqueue_script('bp-groupblog-js', get_stylesheet_directory_uri() . '/groupblog/js/general.js', array('jquery'));
        } else {
            wp_enqueue_script('bp-groupblog-js', plugins_url() . '/bp-groupblog/groupblog/js/general.js', array('jquery'));
        }
    }
}

/**
 * Check to see if a high five is being given, and if so, save it.
 *
 * Hooked to bp_actions, this function will fire before the screen function. We use our function
 * bp_is_example_component(), along with the bp_is_current_action() and bp_is_action_variable()
 * functions, to detect (based on the requested URL) whether the user has clicked on "send high
 * five". If so, we do a bit of simple logic to see what should happen next.
 *
 * @package BuddyPress_Skeleton_Component
 * @since 1.6
 */
function bp_example_high_five_save()
{
    if (bp_is_example_component() && bp_is_current_action('screen-one') && bp_is_action_variable('send-h5', 0)) {
        // The logged in user has clicked on the 'send high five' link
        if (bp_is_my_profile()) {
            // Don't let users high five themselves
            bp_core_add_message(__('No self-fives! :)', 'bp-example'), 'error');
        } else {
            if (bp_example_send_highfive(bp_displayed_user_id(), bp_loggedin_user_id())) {
                bp_core_add_message(__('High-five sent!', 'bp-example'));
            } else {
                bp_core_add_message(__('High-five could not be sent.', 'bp-example'), 'error');
            }
        }
        bp_core_redirect(bp_displayed_user_domain() . bp_get_example_slug() . '/screen-one');
    }
}

/**
 * This function runs when an action is set for a screen:
 * example.com/members/andy/profile/change-avatar/ [delete-avatar]
 *
 * The function will delete the active avatar for a user.
 *
 * @package BuddyPress Xprofile
 * @uses bp_core_delete_avatar() Deletes the active avatar for the logged in user.
 * @uses add_action() Runs a specific function for an action when it fires.
 */
function xprofile_action_delete_avatar()
{
    if (!bp_is_user_change_avatar() || !bp_is_action_variable('delete-avatar', 0)) {
        return false;
    }
    // Check the nonce
    check_admin_referer('bp_delete_avatar_link');
    if (!bp_is_my_profile() && !bp_current_user_can('bp_moderate')) {
        return false;
    }
    if (bp_core_delete_existing_avatar(array('item_id' => bp_displayed_user_id()))) {
        bp_core_add_message(__('Your avatar was deleted successfully!', 'buddypress'));
    } else {
        bp_core_add_message(__('There was a problem deleting that avatar, please try again.', 'buddypress'), 'error');
    }
    bp_core_redirect(wp_get_referer());
}

/**
 * Catch and process the Requests page.
 */
function friends_screen_requests()
{
    if (bp_is_action_variable('accept', 0) && is_numeric(bp_action_variable(1))) {
        // Check the nonce
        check_admin_referer('friends_accept_friendship');
        if (friends_accept_friendship(bp_action_variable(1))) {
            bp_core_add_message(__('Friendship accepted', 'buddypress'));
        } else {
            bp_core_add_message(__('Friendship could not be accepted', 'buddypress'), 'error');
        }
        bp_core_redirect(trailingslashit(bp_loggedin_user_domain() . bp_current_component() . '/' . bp_current_action()));
    } elseif (bp_is_action_variable('reject', 0) && is_numeric(bp_action_variable(1))) {
        // Check the nonce
        check_admin_referer('friends_reject_friendship');
        if (friends_reject_friendship(bp_action_variable(1))) {
            bp_core_add_message(__('Friendship rejected', 'buddypress'));
        } else {
            bp_core_add_message(__('Friendship could not be rejected', 'buddypress'), 'error');
        }
        bp_core_redirect(trailingslashit(bp_loggedin_user_domain() . bp_current_component() . '/' . bp_current_action()));
    } elseif (bp_is_action_variable('cancel', 0) && is_numeric(bp_action_variable(1))) {
        // Check the nonce
        check_admin_referer('friends_withdraw_friendship');
        if (friends_withdraw_friendship(bp_loggedin_user_id(), bp_action_variable(1))) {
            bp_core_add_message(__('Friendship request withdrawn', 'buddypress'));
        } else {
            bp_core_add_message(__('Friendship request could not be withdrawn', 'buddypress'), 'error');
        }
        bp_core_redirect(trailingslashit(bp_loggedin_user_domain() . bp_current_component() . '/' . bp_current_action()));
    }
    /**
     * Fires before the loading of template for the friends requests page.
     *
     * @since BuddyPress (1.0.0)
     */
    do_action('friends_screen_requests');
    /**
     * Filters the template used to display the My Friends page.
     *
     * @since BuddyPress (1.0.0)
     *
     * @param string $template Path to the friends request template to load.
     */
    bp_core_load_template(apply_filters('friends_template_requests', 'members/single/home'));
}

 /**
  * Sets up the current view when viewing a user page
  *
  * @since 1.2
  */
 function get_current_view($view, $item_type)
 {
     global $wp_rewrite;
     if ($item_type == 'user') {
         $current_action = bp_current_action();
         if (empty($current_action) || in_array($current_action, array(BP_DOCS_STARTED_SLUG, BP_DOCS_EDITED_SLUG))) {
             // An empty $bp->action_variables[0] means that you're looking at a list.
             // A url like members/terry/docs/started/page/3 also means you're looking at a list.
             $view = 'list';
         } else {
             if ($current_action == BP_DOCS_CATEGORY_SLUG) {
                 // Category view
                 $view = 'category';
             } else {
                 if ($current_action == BP_DOCS_CREATE_SLUG) {
                     // Create new doc
                     $view = 'create';
                 } else {
                     if (!bp_action_variable(0)) {
                         // $bp->action_variables[1] is the slug for this doc. If there's no
                         // further chunk, then we're attempting to view a single item
                         $view = 'single';
                     } else {
                         if (bp_is_action_variable(BP_DOCS_EDIT_SLUG, 0)) {
                             // This is an edit page
                             $view = 'edit';
                         } else {
                             if (bp_is_action_variable(BP_DOCS_DELETE_SLUG, 0)) {
                                 // This is an delete request
                                 $view = 'delete';
                             } else {
                                 if (bp_is_action_variable(BP_DOCS_HISTORY_SLUG, 0)) {
                                     // This is a history request
                                     $view = 'history';
                                 }
                             }
                         }
                     }
                 }
             }
         }
     }
     return $view;
 }

function messages_action_bulk_delete()
{
    if (!bp_is_messages_component() || !bp_is_action_variable('bulk-delete', 0)) {
        return false;
    }
    $thread_ids = $_POST['thread_ids'];
    if (!$thread_ids || !messages_check_thread_access($thread_ids)) {
        bp_core_redirect(trailingslashit(bp_displayed_user_domain() . bp_get_messages_slug() . '/' . bp_current_action()));
    } else {
        if (!check_admin_referer('messages_delete_thread')) {
            return false;
        }
        if (!messages_delete_thread($thread_ids)) {
            bp_core_add_message(__('There was an error deleting messages.', 'buddypress'), 'error');
        } else {
            bp_core_add_message(__('Messages deleted.', 'buddypress'));
        }
        bp_core_redirect(trailingslashit(bp_displayed_user_domain() . bp_get_messages_slug() . '/' . bp_current_action()));
    }
}

 /**
  * Sets up the current view when viewing a user page
  *
  * @since 1.2
  */
 function get_current_view($view, $item_type)
 {
     if ($item_type == 'user') {
         if (!bp_current_action()) {
             // An empty $bp->action_variables[0] means that you're looking at a list
             $view = 'list';
         } else {
             if (bp_is_current_action(BP_DOCS_CATEGORY_SLUG)) {
                 // Category view
                 $view = 'category';
             } else {
                 if (bp_is_current_action(BP_DOCS_CREATE_SLUG)) {
                     // Create new doc
                     $view = 'create';
                 } else {
                     if (!bp_action_variable(0)) {
                         // $bp->action_variables[1] is the slug for this doc. If there's no
                         // further chunk, then we're attempting to view a single item
                         $view = 'single';
                     } else {
                         if (bp_is_action_variable(BP_DOCS_EDIT_SLUG, 0)) {
                             // This is an edit page
                             $view = 'edit';
                         } else {
                             if (bp_is_action_variable(BP_DOCS_DELETE_SLUG, 0)) {
                                 // This is an delete request
                                 $view = 'delete';
                             } else {
                                 if (bp_is_action_variable(BP_DOCS_HISTORY_SLUG, 0)) {
                                     // This is a history request
                                     $view = 'history';
                                 }
                             }
                         }
                     }
                 }
             }
         }
     }
     return $view;
 }

 public function view_single()
 {
     $bp = buddypress();
     if (function_exists('bp_is_group') && !bp_is_group()) {
         return;
     }
     //do not catch the request for creating new post
     if (bp_is_action_variable('create', 0)) {
         return;
     }
     $current_group = groups_get_current_group();
     if (bcg_is_disabled($current_group->id)) {
         return;
     }
     //if the group is private/hidden and user is not member, return
     if (($current_group->status == 'private' || $current_group->status == 'hidden') && (!is_user_logged_in() || !groups_is_user_member(bp_loggedin_user_id(), $current_group->id))) {
         return;
         //avoid prioivacy troubles
     }
     if (bcg_is_component() && !empty($bp->action_variables[0])) {
         //should we check for the existence of the post?
         add_action('bp_template_content', array($this, 'get_single_post_contents'));
     }
 }

/**
 * Initiate the loop for a single topic's posts.
 *
 * @param array $args {
 *     Arguments for limiting the contents of the topic posts loop.
 *     @type int $topic_id ID of the topic to which the posts belong.
 *     @type int $per_page Number of items to return per page. Default: 15.
 *     @type int $max Max items to return. Default: false.
 *     @type string $order 'ASC' or 'DESC'.
 * }
 * @return bool True when posts are found corresponding to the args,
 *         otherwise false.
 */
function bp_has_forum_topic_posts( $args = '' ) {
	global $topic_template;

	$defaults = array(
		'topic_id' => false,
		'per_page' => 15,
		'max'      => false,
		'order'    => 'ASC'
	);

	$r = bp_parse_args( $args, $defaults, 'has_forum_topic_posts' );
	extract( $r, EXTR_SKIP );

	if ( empty( $topic_id ) && bp_is_groups_component() && bp_is_current_action( 'forum' ) && bp_is_action_variable( 'topic', 0 ) && bp_action_variable( 1 ) )
		$topic_id = bp_forums_get_topic_id_from_slug( bp_action_variable( 1 ) );
	elseif ( empty( $topic_id ) && bp_is_forums_component() && bp_is_current_action( 'topic' ) && bp_action_variable( 0 ) )
		$topic_id = bp_forums_get_topic_id_from_slug( bp_action_variable( 0 ) );

	if ( empty( $topic_id ) ) {
		return false;

	} else {
		$topic_template = new BP_Forums_Template_Topic( (int) $topic_id, $per_page, $max, $order );

		// Current topic forum_id needs to match current_group forum_id
		if ( bp_is_groups_component() && $topic_template->forum_id != groups_get_groupmeta( bp_get_current_group_id(), 'forum_id' ) )
			return false;
	}

	/**
	 * Filters whether or not there are topics to display.
	 *
	 * @since BuddyPress (1.1.0)
	 *
	 * @param bool                     $value          Whether or not there are topics.
	 * @param BP_Forums_Template_Topic $topic_template Topic template global to use when rendering.
	 */
	return apply_filters( 'bp_has_topic_posts', $topic_template->has_posts(), $topic_template );
}

/**
 * Displays Friends header tabs
 *
 * @deprecated 1.6.0
 * @deprecated No longer used
 */
function bp_friends_header_tabs()
{
    _deprecated_function(__FUNCTION__, '1.6', 'Since BuddyPress 1.2, BP has not supported ordering of friend lists by URL parameters.');
    ?>

	<li<?php 
    if (!bp_action_variable(0) || bp_is_action_variable('recently-active', 0)) {
        ?>
 class="current"<?php 
    }
    ?>
><a href="<?php 
    echo trailingslashit(bp_displayed_user_domain() . bp_get_friends_slug() . '/my-friends/recently-active');
    ?>
"><?php 
    _e('Recently Active', 'buddypress');
    ?>
</a></li>
	<li<?php 
    if (bp_is_action_variable('newest', 0)) {
        ?>
 class="current"<?php 
    }
    ?>
><a href="<?php 
    echo trailingslashit(bp_displayed_user_domain() . bp_get_friends_slug() . '/my-friends/newest');
    ?>
"><?php 
    _e('Newest', 'buddypress');
    ?>
</a></li>
	<li<?php 
    if (bp_is_action_variable('alphabetically', 0)) {
        ?>
 class="current"<?php 
    }
    ?>
><a href="<?php 
    echo trailingslashit(bp_displayed_user_domain() . bp_get_friends_slug() . '/my-friends/alphabetically');
    ?>
"><?php 
    _e('Alphabetically', 'buddypress');
    ?>
</a></li>

<?php 
    do_action('friends_header_tabs');
}

/**
 * This function handles actions related to member management on the group admin.
 */
function groups_screen_group_admin_manage_members()
{
    if ('manage-members' != bp_get_group_current_admin_tab()) {
        return false;
    }
    if (!bp_is_item_admin()) {
        return false;
    }
    $bp = buddypress();
    if (bp_action_variable(1) && bp_action_variable(2) && bp_action_variable(3)) {
        if (bp_is_action_variable('promote', 1) && (bp_is_action_variable('mod', 2) || bp_is_action_variable('admin', 2)) && is_numeric(bp_action_variable(3))) {
            $user_id = bp_action_variable(3);
            $status = bp_action_variable(2);
            // Check the nonce first.
            if (!check_admin_referer('groups_promote_member')) {
                return false;
            }
            // Promote a user.
            if (!groups_promote_member($user_id, $bp->groups->current_group->id, $status)) {
                bp_core_add_message(__('There was an error when promoting that user. Please try again.', 'buddypress'), 'error');
            } else {
                bp_core_add_message(__('User promoted successfully', 'buddypress'));
            }
            /**
             * Fires before the redirect after a group member has been promoted.
             *
             * @since 1.0.0
             *
             * @param int $user_id ID of the user being promoted.
             * @param int $id      ID of the group user is promoted within.
             */
            do_action('groups_promoted_member', $user_id, $bp->groups->current_group->id);
            bp_core_redirect(bp_get_group_permalink(groups_get_current_group()) . 'admin/manage-members/');
        }
    }
    if (bp_action_variable(1) && bp_action_variable(2)) {
        if (bp_is_action_variable('demote', 1) && is_numeric(bp_action_variable(2))) {
            $user_id = bp_action_variable(2);
            // Check the nonce first.
            if (!check_admin_referer('groups_demote_member')) {
                return false;
            }
            // Stop sole admins from abandoning their group.
            $group_admins = groups_get_group_admins($bp->groups->current_group->id);
            if (1 == count($group_admins) && $group_admins[0]->user_id == $user_id) {
                bp_core_add_message(__('This group must have at least one admin', 'buddypress'), 'error');
            } elseif (!groups_demote_member($user_id, $bp->groups->current_group->id)) {
                bp_core_add_message(__('There was an error when demoting that user. Please try again.', 'buddypress'), 'error');
            } else {
                bp_core_add_message(__('User demoted successfully', 'buddypress'));
            }
            /**
             * Fires before the redirect after a group member has been demoted.
             *
             * @since 1.0.0
             *
             * @param int $user_id ID of the user being demoted.
             * @param int $id      ID of the group user is demoted within.
             */
            do_action('groups_demoted_member', $user_id, $bp->groups->current_group->id);
            bp_core_redirect(bp_get_group_permalink(groups_get_current_group()) . 'admin/manage-members/');
        }
        if (bp_is_action_variable('ban', 1) && is_numeric(bp_action_variable(2))) {
            $user_id = bp_action_variable(2);
            // Check the nonce first.
            if (!check_admin_referer('groups_ban_member')) {
                return false;
            }
            // Ban a user.
            if (!groups_ban_member($user_id, $bp->groups->current_group->id)) {
                bp_core_add_message(__('There was an error when banning that user. Please try again.', 'buddypress'), 'error');
            } else {
                bp_core_add_message(__('User banned successfully', 'buddypress'));
            }
            /**
             * Fires before the redirect after a group member has been banned.
             *
             * @since 1.0.0
             *
             * @param int $user_id ID of the user being banned.
             * @param int $id      ID of the group user is banned from.
             */
            do_action('groups_banned_member', $user_id, $bp->groups->current_group->id);
            bp_core_redirect(bp_get_group_permalink(groups_get_current_group()) . 'admin/manage-members/');
        }
        if (bp_is_action_variable('unban', 1) && is_numeric(bp_action_variable(2))) {
            $user_id = bp_action_variable(2);
            // Check the nonce first.
            if (!check_admin_referer('groups_unban_member')) {
                return false;
            }
            // Remove a ban for user.
            if (!groups_unban_member($user_id, $bp->groups->current_group->id)) {
                bp_core_add_message(__('There was an error when unbanning that user. Please try again.', 'buddypress'), 'error');
            } else {
                bp_core_add_message(__('User ban removed successfully', 'buddypress'));
            }
//.........这里部分代码省略.........

/**
 * bp_forums_add_forum_topic_to_page_title( $title )
 *
 * Append forum topic to page title
 *
 * @global object $bp
 * @param string $title New page title; see bp_modify_page_title()
 * @param string $title Original page title
 * @param string $sep How to separate the various items within the page title.
 * @param string $seplocation Direction to display title
 * @return string
 * @see bp_modify_page_title()
 */
function bp_forums_add_forum_topic_to_page_title($title, $original_title, $sep, $seplocation)
{
    global $bp;
    if (bp_is_current_action('forum') && bp_is_action_variable('topic', 0)) {
        if (bp_has_forum_topic_posts()) {
            $title .= bp_get_the_topic_title() . " {$sep} ";
        }
    }
    return $title;
}

/**
 * Add RSS feed support for a user's following activity.
 *
 * eg. example.com/members/USERNAME/activity/following/feed/
 *
 * Only available in BuddyPress 1.8+.
 *
 * @since 1.2.1
 * @author r-a-y
 */
function bp_follow_my_following_feed()
{
    // only available in BP 1.8+
    if (!class_exists('BP_Activity_Feed')) {
        return;
    }
    if (!bp_is_user_activity() || !bp_is_current_action(constant('BP_FOLLOWING_SLUG')) || !bp_is_action_variable('feed', 0)) {
        return false;
    }
    global $bp;
    // setup the feed
    $bp->activity->feed = new BP_Activity_Feed(array('id' => 'myfollowing', 'title' => sprintf(__('%1$s | %2$s | Following Activity', 'bp-follow'), bp_get_site_name(), bp_get_displayed_user_fullname()), 'link' => trailingslashit(bp_displayed_user_domain() . bp_get_activity_slug() . '/' . constant('BP_FOLLOWING_SLUG')), 'description' => sprintf(__("Activity feed for people that %s is following.", 'buddypress'), bp_get_displayed_user_fullname()), 'activity_args' => array('user_id' => bp_get_following_ids(), 'display_comments' => 'threaded')));
}

function groups_screen_group_admin_delete_group()
{
    global $bp;
    if (bp_is_groups_component() && bp_is_action_variable('delete-group', 0)) {
        if (!$bp->is_item_admin && !bp_current_user_can('bp_moderate')) {
            return false;
        }
        if (isset($_REQUEST['delete-group-button']) && isset($_REQUEST['delete-group-understand'])) {
            // Check the nonce first.
            if (!check_admin_referer('groups_delete_group')) {
                return false;
            }
            do_action('groups_before_group_deleted', $bp->groups->current_group->id);
            // Group admin has deleted the group, now do it.
            if (!groups_delete_group($bp->groups->current_group->id)) {
                bp_core_add_message(__('There was an error deleting the group, please try again.', 'buddypress'), 'error');
            } else {
                bp_core_add_message(__('The group was deleted successfully', 'buddypress'));
                do_action('groups_group_deleted', $bp->groups->current_group->id);
                bp_core_redirect(bp_loggedin_user_domain() . bp_get_groups_slug() . '/');
            }
            bp_core_redirect(bp_loggedin_user_domain() . bp_get_groups_slug());
        }
        do_action('groups_screen_group_admin_delete_group', $bp->groups->current_group->id);
        bp_core_load_template(apply_filters('groups_template_group_admin_delete_group', 'groups/single/home'));
    }
}

/**
 * Catch and process email sends.
 *
 * @since 1.1.0
 */
function invite_anyone_catch_send()
{
    global $bp;
    if (!bp_is_current_component($bp->invite_anyone->slug)) {
        return;
    }
    if (!bp_is_current_action('sent-invites')) {
        return;
    }
    if (!bp_is_action_variable('send', 0)) {
        return;
    }
    if (!invite_anyone_process_invitations(stripslashes_deep($_POST))) {
        bp_core_add_message(__('Sorry, there was a problem sending your invitations. Please try again.', 'invite-anyone'), 'error');
    }
    bp_core_redirect(bp_displayed_user_domain() . $bp->invite_anyone->slug . '/sent-invites');
}

function bp_is_course_creation_step($step_slug)
{
    global $bp;
    /* Make sure we are in the courses component */
    if (!bp_is_courses_component() || !bp_is_current_action('create')) {
        return false;
    }
    /* If this the first step, we can just accept and return true */
    $keys = array_keys($bp->courses->course_creation_steps);
    if (!bp_action_variable(1) && array_shift($keys) == $step_slug) {
        return true;
    }
    /* Before allowing a user to see a course creation step we must make sure previous steps are completed */
    if (!bp_is_first_course_creation_step()) {
        if (!bp_are_previous_course_creation_steps_complete($step_slug)) {
            return false;
        }
    }
    /* Check the current step against the step parameter */
    if (bp_is_action_variable($step_slug)) {
        return true;
    }
    return false;
}

 /**
  * RSS handler for a user's followed sites.
  *
  * When a user lands on /members/USERNAME/activity/followblogs/feed/, this
  * method generates the RSS feed for their followed sites.
  */
 public static function rss_handler()
 {
     // only available in BP 1.8+
     if (!class_exists('BP_Activity_Feed')) {
         return;
     }
     if (!bp_is_user_activity() || !bp_is_current_action(constant('BP_FOLLOW_BLOGS_USER_ACTIVITY_SLUG')) || !bp_is_action_variable('feed', 0)) {
         return;
     }
     // get blog IDs that the user is following
     $following_ids = bp_get_following_ids(array('follow_type' => 'blogs'));
     // if $following_ids is empty, pass a negative number so no blogs can be found
     $following_ids = empty($following_ids) ? -1 : $following_ids;
     $args = array('user_id' => 0, 'object' => 'blogs', 'primary_id' => $following_ids);
     // setup the feed
     buddypress()->activity->feed = new BP_Activity_Feed(array('id' => 'followedsites', 'title' => sprintf(__('%1$s | %2$s | Followed Site Activity', 'bp-follow'), bp_get_site_name(), bp_get_displayed_user_fullname()), 'link' => trailingslashit(bp_displayed_user_domain() . bp_get_activity_slug() . '/' . constant('BP_FOLLOW_BLOGS_USER_ACTIVITY_SLUG')), 'description' => sprintf(__("Activity feed for sites that %s is following.", 'buddypress'), bp_get_displayed_user_fullname()), 'activity_args' => $args));
 }

 /**
  * Hook this extension's Edit panel into BuddyPress, if necessary.
  *
  * @since BuddyPress (1.8.0)
  */
 protected function setup_edit_hooks()
 {
     // Bail if not in a group
     if (!bp_is_group()) {
         return;
     }
     // Bail if not an edit screen
     if (!$this->is_screen_enabled('edit') || !bp_is_item_admin()) {
         return;
     }
     $screen = $this->screens['edit'];
     $position = isset($screen['position']) ? (int) $screen['position'] : 10;
     $position += 40;
     $current_group = groups_get_current_group();
     $admin_link = trailingslashit(bp_get_group_permalink($current_group) . 'admin');
     $subnav_args = array('name' => $screen['name'], 'slug' => $screen['slug'], 'parent_slug' => $current_group->slug . '_manage', 'parent_url' => trailingslashit(bp_get_group_permalink($current_group) . 'admin'), 'user_has_access' => bp_is_item_admin(), 'position' => $position, 'screen_function' => 'groups_screen_group_admin');
     // Should we add a menu to the Group's WP Admin Bar
     if (!empty($screen['show_in_admin_bar'])) {
         $subnav_args['show_in_admin_bar'] = true;
     }
     // Add the tab to the manage navigation
     bp_core_new_subnav_item($subnav_args);
     // Catch the edit screen and forward it to the plugin template
     if (bp_is_groups_component() && bp_is_current_action('admin') && bp_is_action_variable($screen['slug'], 0)) {
         $this->call_edit_screen_save($this->group_id);
         add_action('groups_custom_edit_steps', array(&$this, 'call_edit_screen'));
         // Determine the proper template and save for later
         // loading
         if ('' !== bp_locate_template(array('groups/single/home.php'), false)) {
             $this->edit_screen_template = '/groups/single/home';
         } else {
             add_action('bp_template_content_header', create_function('', 'echo "<ul class=\\"content-header-nav\\">"; bp_group_admin_tabs(); echo "</ul>";'));
             add_action('bp_template_content', array(&$this, 'call_edit_screen'));
             $this->edit_screen_template = '/groups/single/plugins';
         }
         // We load the template at bp_screens, to give all
         // extensions a chance to load
         add_action('bp_screens', array($this, 'call_edit_screen_template_loader'));
     }
 }