<?php
/**
 * Main BuddyPress Class.
 *
 * @package BuddyPress
 * @subpackage Main
 * @since 1.6.0
 */

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

/**
 * Main BuddyPress Class.
 *
 * Tap tap tap... Is this thing on?
 *
 * @since 1.6.0
 */
class BuddyPress {

	/** Magic *****************************************************************/

	/**
	 * BuddyPress uses many variables, most of which can be filtered to
	 * customize the way that it works. To prevent unauthorized access,
	 * these variables are stored in a private array that is magically
	 * updated using PHP 5.2+ methods. This is to prevent third party
	 * plugins from tampering with essential information indirectly, which
	 * would cause issues later.
	 *
	 * @see BuddyPress::setup_globals()
	 * @var array
	 */
	private $data;

	/** Not Magic *************************************************************/

	/**
	 * Primary BuddyPress navigation.
	 *
	 * @var BP_Core_BP_Nav_BackCompat
	 */
	public $bp_nav;

	/**
	 * Options for the BuddyPress navigation.
	 *
	 * @var BP_Core_BP_Options_Nav_BackCompat
	 */
	public $bp_options_nav;

	/**
	 * Unfiltered URI.
	 *
	 * The unfiltered URI broken down into chunks.
	 *
	 * @var array
	 */
	public $unfiltered_uri = array();

	/**
	 * The canonical URI stack.
	 *
	 * @see bp_redirect_canonical()
	 * @see bp_core_new_nav_item()
	 * @var array
	 */
	public $canonical_stack = array();

	/**
	 * Current action variables.
	 *
	 * @var array
	 */
	public $action_variables = array();

	/**
	 * Current member directory type.
	 *
	 * @var string
	 */
	public $current_member_type = '';

	/**
	 * BuddyPress required components (core, members).
	 *
	 * @var array
	 */
	public $required_components = array();

	/**
	 * BuddyPress loaded components.
	 *
	 * @var array
	 */
	public $loaded_components = array();

	/**
	 * BuddyPress active components.
	 *
	 * @var array
	 */
	public $active_components = array();

	/**
	 * Whether autoload is in use.
	 *
	 * @since 2.5.0
	 * @var bool
	 */
	public $do_autoload = true;

	/**
	 * Activity component.
	 *
	 * @since 1.6.0
	 * @var BP_Activity_Component
	 */
	public $activity;

	/**
	 * Blogs component.
	 *
	 * @since 1.5.0
	 * @var BP_Blogs_Component
	 */
	public $blogs;

	/**
	 * Core component.
	 *
	 * @since 1.6.0
	 * @var BP_Core
	 */
	public $core;

	/**
	 * Forums component.
	 *
	 * @since 1.5.0
	 * @var BP_Forums_Component
	 */
	public $forums;

	/**
	 * Friends component.
	 *
	 * @since 1.6.0
	 * @var BP_Friends_Component
	 */
	public $friends;

	/**
	 * Groups component.
	 *
	 * @since 1.5.0
	 * @var BP_Groups_Component
	 */
	public $groups;

	/**
	 * Members component.
	 *
	 * @since 1.5.0
	 * @var BP_Members_Component
	 */
	public $members;

	/**
	 * Messages component.
	 *
	 * @since 1.5.0
	 * @var BP_Messages_Component
	 */
	public $messages;

	/**
	 * Notifications component.
	 *
	 * @since 1.9.0
	 * @var BP_Notifications_Component
	 */
	public $notifications;

	/**
	 * Settings component.
	 *
	 * @since 1.6.0
	 * @var BP_Settings_Component
	 */
	public $settings;

	/**
	 * XProfile component.
	 *
	 * @since 1.6.0
	 * @var BP_XProfile_Component
	 */
	public $profile;

	/**
	 * BuddyPress Ajax actions.
	 *
	 * @since 12.0.0
	 *
	 * @var array The list of registered Ajax actions.
	 */
	public $ajax_actions = array();

	/** Option Overload *******************************************************/

	/**
	 * BuddyPress options.
	 *
	 * Overloads default options retrieved from get_option().
	 *
	 * @var array
	 */
	public $options = array();

	/** Singleton *************************************************************/

	/**
	 * Main BuddyPress Instance.
	 *
	 * BuddyPress is great.
	 * Please load it only one time.
	 * For this, we thank you.
	 *
	 * Insures that only one instance of BuddyPress exists in memory at any
	 * one time. Also prevents needing to define globals all over the place.
	 *
	 * @since 1.7.0
	 *
	 * @static object $instance
	 * @see buddypress()
	 *
	 * @return BuddyPress|null The one true BuddyPress.
	 */
	public static function instance() {

		// Store the instance locally to avoid private static replication.
		static $instance = null;

		// Only run these methods if they haven't been run previously.
		if ( null === $instance ) {
			$instance = new BuddyPress();
			$instance->constants();
			$instance->setup_globals();
			$instance->legacy_constants();
			$instance->includes();
			$instance->setup_actions();
		}

		// Always return the instance.
		return $instance;

		// The last metroid is in captivity. The galaxy is at peace.
	}

	/** Magic Methods *********************************************************/

	/**
	 * A dummy constructor to prevent BuddyPress from being loaded more than once.
	 *
	 * @since 1.7.0
	 *
	 * @see BuddyPress::instance()
	 * @see buddypress()
	 */
	private function __construct() {
		/* Do nothing here */
	}

	/**
	 * A dummy magic method to prevent BuddyPress from being cloned.
	 *
	 * @since 1.7.0
	 */
	public function __clone() {
		_doing_it_wrong( __FUNCTION__, esc_html__( 'Cheatin&#8217; huh?', 'buddypress' ), '1.7' );
	}

	/**
	 * A dummy magic method to prevent BuddyPress from being unserialized.
	 *
	 * @since 1.7.0
	 */
	public function __wakeup() {
		_doing_it_wrong( __FUNCTION__, esc_html__( 'Cheatin&#8217; huh?', 'buddypress' ), '1.7' );
	}

	/**
	 * Magic method for checking the existence of a certain custom field.
	 *
	 * @since 1.7.0
	 *
	 * @param string $key Key to check the set status for.
	 *
	 * @return bool
	 */
	public function __isset( $key ) {
		return isset( $this->data[ $key ] );
	}

	/**
	 * Magic method for getting BuddyPress variables.
	 *
	 * @since 1.7.0
	 *
	 * @param string $key Key to return the value for.
	 *
	 * @return mixed
	 */
	public function __get( $key ) {
		$valid_key = $key;
		if ( 'root_domain' === $key ) {
			_doing_it_wrong( 'root_domain', esc_html__( 'The root_domain BuddyPress main class property is deprecated since 12.0.0, please use the root_url property instead.', 'buddypress' ), 'BuddyPress 12.0.0' );
			$valid_key = 'root_url';
		}

		return isset( $this->data[ $valid_key ] ) ? $this->data[ $valid_key ] : null;
	}

	/**
	 * Magic method for setting BuddyPress variables.
	 *
	 * @since 1.7.0
	 *
	 * @param string $key   Key to set a value for.
	 * @param mixed  $value Value to set.
	 */
	public function __set( $key, $value ) {
		$valid_key = $key;
		if ( 'root_domain' === $key ) {
			_doing_it_wrong( 'root_domain', esc_html__( 'The root_domain BuddyPress main class property is deprecated since 12.0.0, please use the root_url property instead.', 'buddypress' ), 'BuddyPress 12.0.0' );
			$valid_key = 'root_url';
		}

		$this->data[ $valid_key ] = $value;
	}

	/**
	 * Magic method for unsetting BuddyPress variables.
	 *
	 * @since 1.7.0
	 *
	 * @param string $key Key to unset a value for.
	 */
	public function __unset( $key ) {
		if ( isset( $this->data[ $key ] ) ) {
			unset( $this->data[ $key ] );
		}
	}

	/**
	 * Magic method to prevent notices and errors from invalid method calls.
	 *
	 * @since 1.7.0
	 *
	 * @param string $name
	 * @param array  $args
	 *
	 * @return null
	 */
	public function __call( $name = '', $args = array() ) {
		unset( $name, $args );

		return null;
	}

	/** Private Methods *******************************************************/

	/**
	 * Bootstrap constants.
	 *
	 * @since 1.6.0
	 */
	private function constants() {

		// Place your custom code (actions/filters) in a file called
		// '/plugins/bp-custom.php' and it will be loaded before anything else.
		if ( file_exists( WP_PLUGIN_DIR . '/bp-custom.php' ) ) {
			require WP_PLUGIN_DIR . '/bp-custom.php';
		}

		// Path and URL.
		if ( ! defined( 'BP_PLUGIN_DIR' ) ) {
			define( 'BP_PLUGIN_DIR', plugin_dir_path( __FILE__ ) );
		}

		if ( ! defined( 'BP_PLUGIN_URL' ) ) {
			define( 'BP_PLUGIN_URL', plugin_dir_url( __FILE__ ) );
		}

		// Legacy forum constant - supported for compatibility with bbPress 2.
		if ( ! defined( 'BP_FORUMS_PARENT_FORUM_ID' ) ) {
			define( 'BP_FORUMS_PARENT_FORUM_ID', 1 );
		}

		// Legacy forum constant - supported for compatibility with bbPress 2.
		if ( ! defined( 'BP_FORUMS_SLUG' ) ) {
			define( 'BP_FORUMS_SLUG', 'forums' );
		}

		// Only applicable to those running trunk.
		if ( ! defined( 'BP_SOURCE_SUBDIRECTORY' ) ) {
			define( 'BP_SOURCE_SUBDIRECTORY', '' );
		}

		// Define on which blog ID BuddyPress should run.
		if ( ! defined( 'BP_ROOT_BLOG' ) ) {

			// Default to use current blog ID.
			// Fulfills non-network installs and BP_ENABLE_MULTIBLOG installs.
			$root_blog_id = get_current_blog_id();

			// Multisite check.
			if ( is_multisite() ) {

				// Multiblog isn't enabled.
				if ( ! defined( 'BP_ENABLE_MULTIBLOG' ) || ( defined( 'BP_ENABLE_MULTIBLOG' ) && (int) constant( 'BP_ENABLE_MULTIBLOG' ) === 0 ) ) {
					// Check to see if BP is network-activated
					// We're not using is_plugin_active_for_network() b/c you need to include the
					// /wp-admin/includes/plugin.php file in order to use that function.

					// Get network-activated plugins.
					$plugins = get_site_option( 'active_sitewide_plugins' );

					// Basename.
					$basename = basename( constant( 'BP_PLUGIN_DIR' ) ) . '/bp-loader.php';

					// Plugin is network-activated; use main site ID instead.
					if ( isset( $plugins[ $basename ] ) ) {
						$current_site = get_current_site();
						$root_blog_id = $current_site->blog_id;
					}
				}
			}

			define( 'BP_ROOT_BLOG', $root_blog_id );
		}

		// The search slug has to be defined nice and early because of the way
		// search requests are loaded.
		//
		// @todo Make this better.
		if ( ! defined( 'BP_SEARCH_SLUG' ) ) {
			define( 'BP_SEARCH_SLUG', 'search' );
		}
	}

	/**
	 * Component global variables.
	 *
	 * @since 1.6.0
	 */
	private function setup_globals() {

		/** Versions */

		$this->version    = '15.0.0-alpha';
		$this->db_version = 13906;

		/** Loading */

		/**
		 * Should deprecated code be loaded?
		 *
		 * @since 2.0.0 Defaults to false always
		 * @since 2.8.0 Defaults to true on upgrades, false for new installs.
		 */
		$this->load_deprecated = false;

		/** Toolbar */

		/**
		 * @var string The primary toolbar ID.
		 */
		$this->my_account_menu_id = '';

		/** URIs */

		/**
		 * @var int The current offset of the URI.
		 */
		$this->unfiltered_uri_offset = 0;

		/**
		 * @var bool Are status headers already sent?
		 */
		$this->no_status_set = false;

		/** Components */

		/**
		 * @var string Name of the current BuddyPress component (primary).
		 */
		$this->current_component = '';

		/**
		 * @var string Name of the current BuddyPress item (secondary).
		 */
		$this->current_item = '';

		/**
		 * @var string Name of the current BuddyPress action (tertiary).
		 */
		$this->current_action = '';

		/**
		 * @var bool Displaying custom 2nd level navigation menu (I.E a group).
		 */
		$this->is_single_item = false;

		/** Root */

		/**
		 * Filters the BuddyPress Root blog ID.
		 *
		 * @since 1.5.0
		 *
		 * @const constant BP_ROOT_BLOG BuddyPress Root blog ID.
		 */
		$this->root_blog_id = (int) apply_filters( 'bp_get_root_blog_id', BP_ROOT_BLOG );

		/** Paths */

		// BuddyPress root directory.
		$this->file       = constant( 'BP_PLUGIN_DIR' ) . 'bp-loader.php';
		$this->basename   = basename( constant( 'BP_PLUGIN_DIR' ) ) . '/bp-loader.php';
		$this->plugin_dir = trailingslashit( constant( 'BP_PLUGIN_DIR' ) . constant( 'BP_SOURCE_SUBDIRECTORY' ) );
		$this->plugin_url = trailingslashit( constant( 'BP_PLUGIN_URL' ) . constant( 'BP_SOURCE_SUBDIRECTORY' ) );

		// Languages.
		$this->lang_dir = $this->plugin_dir . 'bp-languages';

		// Templates (theme compatibility).
		$this->themes_dir = $this->plugin_dir . 'bp-templates';
		$this->themes_url = $this->plugin_url . 'bp-templates';

		/** Theme Compat */

		$this->theme_compat = new stdClass(); // Base theme compatibility class.
		$this->filters      = new stdClass(); // Used when adding/removing filters.

		/** Users */

		$this->current_user   = new stdClass();
		$this->displayed_user = new stdClass();

		/** Post types and taxonomies */

		/**
		 * Filters the post type slug for the email component.
		 *
		 * @since 2.5.0
		 *
		 * @param string $value Email post type slug.
		 */
		$this->email_post_type = apply_filters( 'bp_email_post_type', 'bp-email' );

		/**
		 * Filters the taxonomy slug for the email type component.
		 *
		 * @since 2.5.0
		 *
		 * @param string $value Email type taxonomy slug.
		 */
		$this->email_taxonomy_type = apply_filters( 'bp_email_tax_type', 'bp-email-type' );

		/**
		 * Are PHPUnit tests running?
		 *
		 * @since 11.0.0
		 *
		 * @param bool $value True if PHPUnit tests are running, false otherwise.
		 */
		$this->is_phpunit_running = function_exists( 'tests_add_filter' );
	}

	/**
	 * Legacy BuddyPress constants.
	 *
	 * Try to avoid using these. Their values have been moved into variables
	 * in the instance, and have matching functions to get/set their values.
	 *
	 * @since 1.7.0
	 */
	private function legacy_constants() {

		// Define the BuddyPress version.
		if ( ! defined( 'BP_VERSION' ) ) {
			define( 'BP_VERSION', $this->version );
		}

		// Define the database version.
		if ( ! defined( 'BP_DB_VERSION' ) ) {
			define( 'BP_DB_VERSION', $this->db_version );
		}
	}

	/**
	 * Include required files.
	 *
	 * @since 1.6.0
	 */
	private function includes() {
		spl_autoload_register( array( $this, 'autoload' ) );

		// Load the WP abstraction file so BuddyPress can run on all WordPress setups.
		require $this->plugin_dir . 'bp-core/bp-core-wpabstraction.php';

		// Setup the versions (after we include multisite abstraction above).
		$this->versions();

		/** Update/Install */

		// Theme compatibility.
		require $this->plugin_dir . 'bp-core/bp-core-template-loader.php';
		require $this->plugin_dir . 'bp-core/bp-core-theme-compatibility.php';

		// Require all of the BuddyPress core libraries.
		require $this->plugin_dir . 'bp-core/bp-core-dependency.php';
		require $this->plugin_dir . 'bp-core/bp-core-actions.php';
		require $this->plugin_dir . 'bp-core/bp-core-caps.php';
		require $this->plugin_dir . 'bp-core/bp-core-cache.php';
		require $this->plugin_dir . 'bp-core/bp-core-cssjs.php';
		require $this->plugin_dir . 'bp-core/bp-core-update.php';
		require $this->plugin_dir . 'bp-core/bp-core-options.php';
		require $this->plugin_dir . 'bp-core/bp-core-taxonomy.php';
		require $this->plugin_dir . 'bp-core/bp-core-filters.php';
		require $this->plugin_dir . 'bp-core/bp-core-attachments.php';
		require $this->plugin_dir . 'bp-core/bp-core-avatars.php';
		require $this->plugin_dir . 'bp-core/bp-core-template.php';
		require $this->plugin_dir . 'bp-core/bp-core-adminbar.php';
		require $this->plugin_dir . 'bp-core/bp-core-buddybar.php';
		require $this->plugin_dir . 'bp-core/bp-core-rewrites.php';
		require $this->plugin_dir . 'bp-core/bp-core-catchuri.php';
		require $this->plugin_dir . 'bp-core/bp-core-functions.php';
		require $this->plugin_dir . 'bp-core/bp-core-moderation.php';
		require $this->plugin_dir . 'bp-core/bp-core-loader.php';
		require $this->plugin_dir . 'bp-core/bp-core-customizer-email.php';
		require $this->plugin_dir . 'bp-core/bp-core-rest-api.php';
		require $this->plugin_dir . 'bp-core/bp-core-blocks.php';

		// Get the list of versions needing their deprecated functions to be loaded.
		$deprecated_functions_versions = bp_get_deprecated_functions_versions();

		// Maybe load deprecated functionality.
		if ( $deprecated_functions_versions && ! $this->is_phpunit_running ) {
			$this->load_deprecated = true;

			foreach ( $deprecated_functions_versions as $deprecated_functions_version ) {
				// Load all or last 2 deprecated versions.
				require $this->plugin_dir . sprintf( 'bp-core/deprecated/%s.php', number_format( $deprecated_functions_version, 1 ) );
			}
		}

		// Load wp-cli module if PHP 5.6+.
		if (
			defined( 'WP_CLI' )
			&& ! class_exists( 'Buddypress\CLI\Command\BuddypressCommand' )
			&& file_exists( $this->plugin_dir . 'cli/wp-cli-bp.php' )
			&& version_compare( phpversion(), '5.6.0', '>=' ) ) {
			require $this->plugin_dir . 'cli/wp-cli-bp.php';
		}
	}

	/**
	 * Autoload classes.
	 *
	 * @since 2.5.0
	 *
	 * @param string $class_name Classes to be autoloaded.
	 */
	public function autoload( $class_name ) {
		$class_parts = explode( '_', strtolower( $class_name ) );

		if ( 'bp' !== $class_parts[0] ) {
			return;
		}

		$components = array(
			'activity',
			'blogs',
			'core',
			'friends',
			'groups',
			'members',
			'messages',
			'notifications',
			'settings',
			'xprofile',
		);

		// These classes don't have a name that matches their component.
		$irregular_map = array(
			'BP_Akismet'                       => 'activity',
			'BP_Admin'                         => 'core',
			'BP_Attachment_Avatar'             => 'core',
			'BP_Attachment_Cover_Image'        => 'core',
			'BP_Attachment'                    => 'core',
			'BP_Button'                        => 'core',
			'BP_Block'                         => 'core',
			'BP_Component'                     => 'core',
			'BP_Customizer_Control_Range'      => 'core',
			'BP_Date_Query'                    => 'core',
			'BP_Email_Delivery'                => 'core',
			'BP_Email_Address'                 => 'core',
			'BP_Email_Recipient'               => 'core',
			'BP_Email_Sender'                  => 'core',
			'BP_Email_Participant'             => 'core',
			'BP_Email'                         => 'core',
			'BP_Embed'                         => 'core',
			'BP_Media_Extractor'               => 'core',
			'BP_Members_Suggestions'           => 'core',
			'BP_PHPMailer'                     => 'core',
			'BP_Recursive_Query'               => 'core',
			'BP_Suggestions'                   => 'core',
			'BP_Theme_Compat'                  => 'core',
			'BP_User_Query'                    => 'core',
			'BP_Walker_Category_Checklist'     => 'core',
			'BP_Walker_Nav_Menu'               => 'core',
			'BP_Invitation_Manager'            => 'core',
			'BP_Invitation'                    => 'core',
			'BP_REST_Attachments'              => 'core',
			'BP_Admin_Types'                   => 'core',
			'BP_LoggedIn_User'                 => 'core',
			'BP_Optout'                        => 'core',
			'BP_Optouts_List_Table'            => 'core',
			'BP_Group_Extension'               => 'groups',
			'BP_Group_Member_Query'            => 'groups',
			'BP_Core_Members_Template'         => 'members',
			'BP_Registration_Theme_Compat'     => 'members',
			'BP_Signup'                        => 'members',
			'BP_Members_Invitation_Manager'    => 'members',
			'BP_Members_Invitations_Template'  => 'members',
			'BP_Members_Invitations_Component' => 'members',
		);

		$component = null;

		// First check to see if the class is one without a properly namespaced name.
		if ( isset( $irregular_map[ $class_name ] ) ) {
			$component = $irregular_map[ $class_name ];

			// Next chunk is usually the component name.
		} elseif ( in_array( $class_parts[1], $components, true ) ) {
			$component = $class_parts[1];
		}

		if ( ! $component ) {
			return;
		}

		// Sanitize class name.
		$class = strtolower( str_replace( '_', '-', $class_name ) );

		if ( 'bp-rest-attachments' === $class ) {
			$path = __DIR__ . "/bp-{$component}/classes/trait-attachments.php";
		} else {
			$path = __DIR__ . "/bp-{$component}/classes/class-{$class}.php";
		}

		// Sanity check.
		if ( ! file_exists( $path ) ) {
			return;
		}

		/*
		 * Sanity check 2 - Check if component is active before loading class.
		 * Skip if PHPUnit is running, or BuddyPress is installing for the first time.
		 */
		if (
			! in_array( $component, array( 'core', 'members' ), true ) &&
			! bp_is_active( $component ) &&
			! $this->is_phpunit_running
		) {
			return;
		}

		require $path;
	}

	/**
	 * Set up the default hooks and actions.
	 *
	 * @since 1.6.0
	 */
	private function setup_actions() {

		// Add actions to plugin activation and deactivation hooks.
		add_action( 'activate_' . $this->basename, 'bp_activation' );
		add_action( 'deactivate_' . $this->basename, 'bp_deactivation' );

		// If BuddyPress is being deactivated, do not add any actions.
		if ( bp_is_deactivation( $this->basename ) ) {
			return;
		}

		// Array of BuddyPress core actions.
		$actions = array(
			'setup_theme',              // Setup the default theme compat.
			'setup_current_user',       // Setup currently logged in user.
			'register_post_types',      // Register post types.
			'register_post_statuses',   // Register post statuses.
			'register_taxonomies',      // Register taxonomies.
			'register_views',           // Register the views.
			'register_theme_packages',  // Register bundled theme packages (bp-themes).
			'load_textdomain',          // Load textdomain.
			'add_rewrite_tags',         // Add rewrite tags.
			'generate_rewrite_rules',    // Generate rewrite rules.
		);

		// Add the actions.
		foreach ( $actions as $class_action ) {
			if ( method_exists( $this, $class_action ) ) {
				add_action( 'bp_' . $class_action, array( $this, $class_action ), 5 );
			}
		}

		/**
		 * Fires after the setup of all BuddyPress actions.
		 *
		 * Includes bbp-core-hooks.php.
		 *
		 * @since 1.7.0
		 *
		 * @param BuddyPress $this. Current BuddyPress instance. Passed by reference.
		 */
		do_action_ref_array( 'bp_after_setup_actions', array( &$this ) );
	}

	/**
	 * Private method to align the active and database versions.
	 *
	 * @since 1.7.0
	 */
	private function versions() {

		// Get the possible DB versions (boy is this gross).
		$versions               = array();
		$versions['1.6-single'] = get_blog_option( $this->root_blog_id, '_bp_db_version' );

		// 1.6-single exists, so trust it.
		if ( ! empty( $versions['1.6-single'] ) ) {
			$this->db_version_raw = (int) $versions['1.6-single'];

			// If no 1.6-single exists, use the max of the others.
		} else {
			$versions['1.2']        = get_site_option( 'bp-core-db-version' );
			$versions['1.5-multi']  = get_site_option( 'bp-db-version' );
			$versions['1.6-multi']  = get_site_option( '_bp_db_version' );
			$versions['1.5-single'] = get_blog_option( $this->root_blog_id, 'bp-db-version' );

			// Remove empty array items.
			$versions             = array_filter( $versions );
			$this->db_version_raw = (int) ( ! empty( $versions ) ) ? (int) max( $versions ) : 0;
		}
	}

	/** Public Methods ********************************************************/

	/**
	 * Set up BuddyPress's legacy theme directory.
	 *
	 * Starting with version 1.2, and ending with version 1.8, BuddyPress
	 * registered a custom theme directory - bp-themes - which contained
	 * the bp-default theme. Since BuddyPress 1.9, bp-themes is no longer
	 * registered (and bp-default no longer offered) on new installations.
	 * Sites using bp-default (or a child theme of bp-default) will
	 * continue to have bp-themes registered as before.
	 * Since 12.0, BuddyPress is no longer including BP Default. To find it
	 * back, you need to install and activate the BP Classic plugin.
	 *
	 * @since 1.5.0
	 * @deprecated 12.0.0
	 */
	public function register_theme_directory() {
		_deprecated_function( __METHOD__, '12.0.0' );
	}

	/**
	 * Register bundled theme packages.
	 *
	 * Note that since we currently have complete control over bp-themes and
	 * the bp-legacy folders, it's fine to hardcode these here. If at a
	 * later date we need to automate this, an API will need to be built.
	 *
	 * @since 1.7.0
	 */
	public function register_theme_packages() {

		// Register the default theme compatibility package.
		bp_register_theme_package(
			array(
				'id'      => 'legacy',
				'name'    => 'BP Legacy',
				'version' => bp_get_version(),
				'dir'     => trailingslashit( $this->themes_dir . '/bp-legacy' ),
				'url'     => trailingslashit( $this->themes_url . '/bp-legacy' ),
			)
		);

		bp_register_theme_package(
			array(
				'id'      => 'nouveau',
				'name'    => 'BP Nouveau',
				'version' => bp_get_version(),
				'dir'     => trailingslashit( $this->themes_dir . '/bp-nouveau' ),
				'url'     => trailingslashit( $this->themes_url . '/bp-nouveau' ),
			)
		);

		// Register the basic theme stack. This is really dope.
		bp_register_template_stack( 'get_stylesheet_directory', 10 );
		bp_register_template_stack( 'get_template_directory', 12 );
		bp_register_template_stack( 'bp_get_theme_compat_dir', 14 );
	}

	/**
	 * Set up the default BuddyPress theme compatibility location.
	 *
	 * @since 1.7.0
	 */
	public function setup_theme() {

		// Bail if something already has this under control.
		if ( ! empty( $this->theme_compat->theme ) ) {
			return;
		}

		// Setup the theme package to use for compatibility.
		bp_setup_theme_compat( bp_get_theme_package_id() );
	}
}
