<?php

/**
 * The bbPress Plugin
 *
 * bbPress is forum software with a twist from the creators of WordPress.
 *
 * $Id: bbpress.php 7228 2021-11-29 15:22:27Z johnjamesjacoby $
 *
 * @package bbPress
 * @subpackage Main
 */

/**
 * Plugin Name:       bbPress
 * Plugin URI:        https://bbpress.org
 * Description:       bbPress is forum software with a twist from the creators of WordPress.
 * Author:            The bbPress Contributors
 * Author URI:        https://bbpress.org
 * Version:           2.6.9
 * Text Domain:       bbpress
 * Domain Path:       /languages/
 * License:           GPLv2 or later (license.txt)
 * Requires PHP:      5.6.20
 * Requires at least: 5.0
 */

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

if ( ! class_exists( 'bbPress' ) ) :
/**
 * Main bbPress Class
 *
 * "Word hard. Stay bumble."
 *
 * @since 2.0.0 bbPress (r2464)
 */
final class bbPress {

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

	/**
	 * bbPress uses many variables, several of which can be filtered to
	 * customize the way it operates. Most of these variables are stored in a
	 * private array that gets updated with the help of PHP magic methods.
	 *
	 * This is a precautionary measure, to avoid potential errors produced by
	 * unanticipated direct manipulation of run-time data.
	 *
	 * @see bbPress::setup_globals()
	 * @var array
	 */
	private $data;

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

	/**
	 * @var mixed False when not logged in; WP_User object when logged in
	 */
	public $current_user = false;

	/**
	 * @var stdClass Add-ons append to this (Akismet, BuddyPress, etc...)
	 */
	public $extend;

	/**
	 * @var array Topic views
	 */
	public $views = array();

	/**
	 * @var array Overloads get_option()
	 */
	public $options = array();

	/**
	 * @var array Storage of options not in the database
	 */
	public $not_options = array();

	/**
	 * @var array Overloads get_user_meta()
	 */
	public $user_options = array();

	/**
	 * @var array Dynamically initialized user roles
	 */
	public $roles = array();

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

	/**
	 * Main bbPress Instance
	 *
	 * bbPress is fun
	 * Please load it only one time
	 * For this, we thank you
	 *
	 * Insures that only one instance of bbPress exists in memory at any one
	 * time. Also prevents needing to define globals all over the place.
	 *
	 * @since 2.1.0 bbPress (r3757)
	 *
	 * @staticvar object $instance
	 * @see bbpress()
	 * @return bbPress The one true bbPress
	 */
	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 ran previously
		if ( null === $instance ) {
			$instance = new bbPress();
			$instance->setup_environment();
			$instance->includes();
			$instance->setup_variables();
			$instance->setup_actions();
		}

		// Always return the instance
		return $instance;
	}

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

	/**
	 * A dummy constructor to prevent bbPress from being loaded more than once.
	 *
	 * @since 2.0.0 bbPress (r2464)
	 *
	 * @see bbPress::instance()
	 * @see bbpress();
	 */
	private function __construct() { /* Do nothing here */ }

	/**
	 * A dummy magic method to prevent bbPress from being cloned
	 *
	 * @since 2.0.0 bbPress (r2464)
	 */
	public function __clone() { _doing_it_wrong( __FUNCTION__, __( 'Cheatin&#8217; huh?', 'bbpress' ), '2.1' ); }

	/**
	 * A dummy magic method to prevent bbPress from being unserialized
	 *
	 * @since 2.0.0 bbPress (r2464)
	 */
	public function __wakeup() { _doing_it_wrong( __FUNCTION__, __( 'Cheatin&#8217; huh?', 'bbpress' ), '2.1' ); }

	/**
	 * Magic method for checking the existence of a certain custom field
	 *
	 * @since 2.1.0 bbPress (r3951)
	 */
	public function __isset( $key ) { return isset( $this->data[ $key ] ); }

	/**
	 * Magic method for getting bbPress variables
	 *
	 * @since 2.1.0 bbPress (r3951)
	 */
	public function __get( $key ) { return isset( $this->data[ $key ] ) ? $this->data[ $key ] : null; }

	/**
	 * Magic method for setting bbPress variables
	 *
	 * @since 2.1.0 bbPress (r3951)
	 */
	public function __set( $key , $value ) { $this->data[ $key ] = $value; }

	/**
	 * Magic method for unsetting bbPress variables
	 *
	 * @since 2.3.0 bbPress (r4628)
	 */
	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 2.2.0 bbPress (r4252)
	 */
	public function __call( $name = '', $args = array() ) { unset( $name, $args ); return null; }

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

	/**
	 * Setup the environment variables to allow the rest of bbPress to function
	 * more easily.
	 *
	 * @since 2.0.0 bbPress (r2626)
	 *
	 * @access private
	 */
	private function setup_environment() {

		/** Versions **********************************************************/

		$this->version    = '2.6.9';
		$this->db_version = '263';

		/** Paths *************************************************************/

		// File & base
		$this->file         = __FILE__;
		$this->basename     = apply_filters( 'bbp_plugin_basename', str_replace( array( 'build/', 'src/' ), '', plugin_basename( $this->file ) ) );
		$this->basepath     = apply_filters( 'bbp_plugin_basepath', trailingslashit( dirname( $this->basename ) ) );

		// Path and URL
		$this->plugin_dir   = apply_filters( 'bbp_plugin_dir_path', plugin_dir_path( $this->file ) );
		$this->plugin_url   = apply_filters( 'bbp_plugin_dir_url',  plugin_dir_url ( $this->file ) );

		// Includes
		$this->includes_dir = apply_filters( 'bbp_includes_dir', trailingslashit( $this->plugin_dir . 'includes'  ) );
		$this->includes_url = apply_filters( 'bbp_includes_url', trailingslashit( $this->plugin_url . 'includes'  ) );

		// Languages
		$this->lang_base    = apply_filters( 'bbp_lang_base',    trailingslashit( $this->basepath   . 'languages' ) );
		$this->lang_dir     = apply_filters( 'bbp_lang_dir',     trailingslashit( $this->plugin_dir . 'languages' ) );

		// Templates
		$this->themes_dir   = apply_filters( 'bbp_themes_dir',   trailingslashit( $this->plugin_dir . 'templates' ) );
		$this->themes_url   = apply_filters( 'bbp_themes_url',   trailingslashit( $this->plugin_url . 'templates' ) );
	}

	/**
	 * Smart defaults to many bbPress specific class variables.
	 *
	 * @since 2.6.0 bbPress (r6330)
	 */
	private function setup_variables() {

		/** Identifiers *******************************************************/

		// Post type identifiers
		$this->forum_post_type   = apply_filters( 'bbp_forum_post_type',  'forum'     );
		$this->topic_post_type   = apply_filters( 'bbp_topic_post_type',  'topic'     );
		$this->topic_tag_tax_id  = apply_filters( 'bbp_topic_tag_tax_id', 'topic-tag' );
		$this->reply_post_type   = apply_filters( 'bbp_reply_post_type',  'reply'     );

		// Status identifiers
		$this->spam_status_id    = apply_filters( 'bbp_spam_post_status',    'spam'    );
		$this->closed_status_id  = apply_filters( 'bbp_closed_post_status',  'closed'  );
		$this->orphan_status_id  = apply_filters( 'bbp_orphan_post_status',  'orphan'  );
		$this->public_status_id  = apply_filters( 'bbp_public_post_status',  'publish' );
		$this->pending_status_id = apply_filters( 'bbp_pending_post_status', 'pending' );
		$this->private_status_id = apply_filters( 'bbp_private_post_status', 'private' );
		$this->hidden_status_id  = apply_filters( 'bbp_hidden_post_status',  'hidden'  );
		$this->trash_status_id   = apply_filters( 'bbp_trash_post_status',   'trash'   );

		// Other identifiers
		$this->user_id           = apply_filters( 'bbp_user_id',        'bbp_user'        );
		$this->tops_id           = apply_filters( 'bbp_tops_id',        'bbp_tops'        );
		$this->reps_id           = apply_filters( 'bbp_reps_id',        'bbp_reps'        );
		$this->favs_id           = apply_filters( 'bbp_favs_id',        'bbp_favs'        );
		$this->subs_id           = apply_filters( 'bbp_subs_id',        'bbp_subs'        );
		$this->view_id           = apply_filters( 'bbp_view_id',        'bbp_view'        );
		$this->edit_id           = apply_filters( 'bbp_edit_id',        'edit'            );
		$this->paged_id          = apply_filters( 'bbp_paged_id',       'paged'           );
		$this->search_id         = apply_filters( 'bbp_search_id',      'bbp_search'      );
		$this->engagements_id    = apply_filters( 'bbp_engagements_id', 'bbp_engagements' );

		/** Queries ***********************************************************/

		$this->current_view_id      = 0; // Current view id
		$this->current_forum_id     = 0; // Current forum id
		$this->current_topic_id     = 0; // Current topic id
		$this->current_reply_id     = 0; // Current reply id
		$this->current_topic_tag_id = 0; // Current topic tag id
		$this->current_user_id      = 0; // Current topic tag id

		$this->forum_query    = new WP_Query();       // Main forum query
		$this->topic_query    = new WP_Query();       // Main topic query
		$this->reply_query    = new WP_Query();       // Main reply query
		$this->search_query   = new WP_Query();       // Main search query
		$this->user_query     = new BBP_User_Query(); // Main user query

		/** 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 WP_User(); // Currently logged in user
		$this->displayed_user = new WP_User(); // Currently displayed user

		/** Misc **************************************************************/

		$this->domain         = 'bbpress';      // Unique identifier for retrieving translated strings
		$this->extend         = new stdClass(); // Plugins add data here
		$this->errors         = new WP_Error(); // Feedback

		/** Deprecated ********************************************************/

		$this->tab_index      = apply_filters( 'bbp_default_tab_index', 100 );
	}

	/**
	 * Include required files
	 *
	 * @since 2.0.0 bbPress (r2626)
	 *
	 * @access private
	 */
	private function includes() {

		/** Core **************************************************************/

		require $this->includes_dir . 'core/abstraction.php';
		require $this->includes_dir . 'core/sub-actions.php';
		require $this->includes_dir . 'core/functions.php';
		require $this->includes_dir . 'core/cache.php';
		require $this->includes_dir . 'core/options.php';
		require $this->includes_dir . 'core/capabilities.php';
		require $this->includes_dir . 'core/update.php';
		require $this->includes_dir . 'core/template-functions.php';
		require $this->includes_dir . 'core/template-loader.php';
		require $this->includes_dir . 'core/theme-compat.php';

		/** Components ********************************************************/

		// Common
		require $this->includes_dir . 'common/ajax.php';
		require $this->includes_dir . 'common/classes.php';
		require $this->includes_dir . 'common/engagements.php';
		require $this->includes_dir . 'common/functions.php';
		require $this->includes_dir . 'common/formatting.php';
		require $this->includes_dir . 'common/locale.php';
		require $this->includes_dir . 'common/locks.php';
		require $this->includes_dir . 'common/template.php';
		require $this->includes_dir . 'common/widgets.php';
		require $this->includes_dir . 'common/shortcodes.php';

		// Forums
		require $this->includes_dir . 'forums/capabilities.php';
		require $this->includes_dir . 'forums/functions.php';
		require $this->includes_dir . 'forums/template.php';

		// Topics
		require $this->includes_dir . 'topics/capabilities.php';
		require $this->includes_dir . 'topics/functions.php';
		require $this->includes_dir . 'topics/template.php';

		// Replies
		require $this->includes_dir . 'replies/capabilities.php';
		require $this->includes_dir . 'replies/functions.php';
		require $this->includes_dir . 'replies/template.php';

		// Search
		require $this->includes_dir . 'search/functions.php';
		require $this->includes_dir . 'search/template.php';

		// Users
		require $this->includes_dir . 'users/capabilities.php';
		require $this->includes_dir . 'users/engagements.php';
		require $this->includes_dir . 'users/functions.php';
		require $this->includes_dir . 'users/template.php';
		require $this->includes_dir . 'users/options.php';
		require $this->includes_dir . 'users/signups.php';

		/** Hooks *************************************************************/

		require $this->includes_dir . 'core/extend.php';
		require $this->includes_dir . 'core/actions.php';
		require $this->includes_dir . 'core/filters.php';

		/** Admin *************************************************************/

		// Quick admin check and load if needed
		if ( is_admin() ) {
			require $this->includes_dir . 'admin/actions.php';
		}
	}

	/**
	 * Setup the default hooks and actions
	 *
	 * @since 2.0.0 bbPress (r2644)
	 *
	 * @access private
	 */
	private function setup_actions() {

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

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

		// Array of bbPress core actions
		$actions = array(
			'setup_theme',              // Setup the default theme compat
			'setup_current_user',       // Setup currently logged in user
			'setup_engagements',        // Setup user engagements strategy
			'roles_init',               // User roles init
			'register_meta',            // Register meta (forum|topic|reply|user)
			'register_post_types',      // Register post types (forum|topic|reply)
			'register_post_statuses',   // Register post statuses (closed|spam|orphan|hidden)
			'register_taxonomies',      // Register taxonomies (topic-tag)
			'register_shortcodes',      // Register shortcodes (bbp-login)
			'register_views',           // Register the views (no-replies)
			'register_theme_packages',  // Register bundled theme packages (bbp-theme-compat/bbp-themes)
			'load_textdomain',          // Load textdomain (bbpress)
			'add_rewrite_tags',         // Add rewrite tags (view|user|edit|search)
			'add_rewrite_rules',        // Generate rewrite rules (view|edit|paged|search)
			'add_permastructs'          // Add permalink structures (view|user|search)
		);

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

		// All bbPress actions are setup (includes bbp-core-hooks.php)
		do_action_ref_array( 'bbp_after_setup_actions', array( &$this ) );
	}

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

	/**
	 * Register bundled theme packages
	 *
	 * Note that since we currently have complete control over bbp-themes and
	 * the bbp-theme-compat folders, it's fine to hardcode these here. If at a
	 * later date we need to automate this, and API will need to be built.
	 *
	 * @since 2.1.0 bbPress (r3829)
	 */
	public function register_theme_packages() {

		// Register the basic theme stack. This is really dope.
		bbp_register_template_stack( 'get_stylesheet_directory', 6 );
		bbp_register_template_stack( 'get_template_directory',   8 );

		// Register the default theme compatibility package
		bbp_register_theme_package( array(
			'id'      => 'default',
			'name'    => 'bbPress Default',
			'version' => bbp_get_version(),
			'dir'     => trailingslashit( $this->themes_dir . 'default' ),
			'url'     => trailingslashit( $this->themes_url . 'default' )
		) );
	}

	/**
	 * Setup the default bbPress theme compatibility location.
	 *
	 * @since 2.1.0 bbPress (r3778)
	 */
	public function setup_theme() {
		bbp_setup_theme_compat( bbp_get_theme_package_id() );
	}

	/**
	 * Load the translation file for current language. Checks the deprecated
	 * languages folder inside the bbPress plugin first, and then the default
	 * WordPress languages folder.
	 *
	 * Note that custom translation files inside the bbPress plugin folder
	 * will be removed on bbPress updates. If you're creating custom
	 * translation files, please use the global language folder.
	 *
	 * @since 2.0.0 bbPress (r2596)
	 */
	public function load_textdomain() {

		// Define the old directory
		$old_dir = WP_LANG_DIR . '/bbpress/';

		// Old location, deprecated in 2.6.0
		if ( is_dir( $old_dir ) ) {

			// Get locale & file-name
			$type   = is_admin() ? get_user_locale() : get_locale();
			$locale = apply_filters( 'plugin_locale', $type, $this->domain );
			$mofile = sprintf( '%1$s-%2$s.mo', $this->domain, $locale );

			// Look in global /wp-content/languages/bbpress/ folder
			load_textdomain( $this->domain, $old_dir . $mofile );
		}

		// Look in global /wp-content/languages/plugins/
		load_plugin_textdomain( $this->domain, false, $this->lang_base );
	}

	/**
	 * Setup the post types for forums, topics and replies
	 *
	 * @since 2.0.0 bbPress (r2597)
	 */
	public static function register_post_types() {

		/** Forums ************************************************************/

		// Register Forum content type
		register_post_type(
			bbp_get_forum_post_type(),
			apply_filters( 'bbp_register_forum_post_type', array(
				'labels'              => bbp_get_forum_post_type_labels(),
				'rewrite'             => bbp_get_forum_post_type_rewrite(),
				'supports'            => bbp_get_forum_post_type_supports(),
				'description'         => esc_html__( 'bbPress Forums', 'bbpress' ),
				'capabilities'        => bbp_get_forum_caps(),
				'capability_type'     => array( 'forum', 'forums' ),
				'menu_position'       => 555555,
				'has_archive'         => bbp_get_root_slug(),
				'exclude_from_search' => true,
				'show_in_nav_menus'   => true,
				'public'              => true,
				'show_ui'             => current_user_can( 'bbp_forums_admin' ),
				'can_export'          => true,
				'hierarchical'        => true,
				'query_var'           => true,
				'menu_icon'           => '',
				'source'              => 'bbpress',
			) )
		);

		/** Topics ************************************************************/

		// Register Topic content type
		register_post_type(
			bbp_get_topic_post_type(),
			apply_filters( 'bbp_register_topic_post_type', array(
				'labels'              => bbp_get_topic_post_type_labels(),
				'rewrite'             => bbp_get_topic_post_type_rewrite(),
				'supports'            => bbp_get_topic_post_type_supports(),
				'description'         => esc_html__( 'bbPress Topics', 'bbpress' ),
				'capabilities'        => bbp_get_topic_caps(),
				'capability_type'     => array( 'topic', 'topics' ),
				'menu_position'       => 555555,
				'has_archive'         => ( 'forums' === bbp_show_on_root() ) ? bbp_get_topic_archive_slug() : false,
				'exclude_from_search' => true,
				'show_in_nav_menus'   => false,
				'public'              => true,
				'show_ui'             => current_user_can( 'bbp_topics_admin' ),
				'can_export'          => true,
				'hierarchical'        => false,
				'query_var'           => true,
				'menu_icon'           => '',
				'source'              => 'bbpress',
			)
		) );

		/** Replies ***********************************************************/

		// Register reply content type
		register_post_type(
			bbp_get_reply_post_type(),
			apply_filters( 'bbp_register_reply_post_type', array(
				'labels'              => bbp_get_reply_post_type_labels(),
				'rewrite'             => bbp_get_reply_post_type_rewrite(),
				'supports'            => bbp_get_reply_post_type_supports(),
				'description'         => esc_html__( 'bbPress Replies', 'bbpress' ),
				'capabilities'        => bbp_get_reply_caps(),
				'capability_type'     => array( 'reply', 'replies' ),
				'menu_position'       => 555555,
				'exclude_from_search' => true,
				'has_archive'         => false,
				'show_in_nav_menus'   => false,
				'public'              => true,
				'show_ui'             => current_user_can( 'bbp_replies_admin' ),
				'can_export'          => true,
				'hierarchical'        => false,
				'query_var'           => true,
				'menu_icon'           => '',
				'source'              => 'bbpress',
			) )
		);
	}

	/**
	 * Register the post statuses used by bbPress
	 *
	 * We do some manipulation of the 'trash' status so trashed topics and
	 * replies can be viewed from within the theme.
	 *
	 * @since 2.0.0 bbPress (r2727)
	 */
	public static function register_post_statuses() {

		// Closed
		register_post_status(
			bbp_get_closed_status_id(),
			apply_filters( 'bbp_register_closed_post_status', array(
				'label'                     => _x( 'Closed', 'post', 'bbpress' ),
				'label_count'               => _nx_noop( 'Closed <span class="count">(%s)</span>', 'Closed <span class="count">(%s)</span>', 'post', 'bbpress' ),
				'public'                    => true,
				'show_in_admin_status_list' => true,
				'show_in_admin_all_list'    => true,
				'source'                    => 'bbpress'
			) )
		);

		// Spam
		register_post_status(
			bbp_get_spam_status_id(),
			apply_filters( 'bbp_register_spam_post_status', array(
				'label'                     => _x( 'Spam', 'post', 'bbpress' ),
				'label_count'               => _nx_noop( 'Spam <span class="count">(%s)</span>', 'Spam <span class="count">(%s)</span>', 'post', 'bbpress' ),
				'protected'                 => true,
				'exclude_from_search'       => true,
				'show_in_admin_status_list' => true,
				'show_in_admin_all_list'    => false,
				'source'                    => 'bbpress'
			) )
		);

		// Orphan
		register_post_status(
			bbp_get_orphan_status_id(),
			apply_filters( 'bbp_register_orphan_post_status', array(
				'label'                     => _x( 'Orphan', 'post', 'bbpress' ),
				'label_count'               => _nx_noop( 'Orphan <span class="count">(%s)</span>', 'Orphans <span class="count">(%s)</span>', 'post', 'bbpress' ),
				'protected'                 => true,
				'exclude_from_search'       => true,
				'show_in_admin_status_list' => true,
				'show_in_admin_all_list'    => false,
				'source'                    => 'bbpress'
			) )
		);

		// Hidden
		register_post_status(
			bbp_get_hidden_status_id(),
			apply_filters( 'bbp_register_hidden_post_status', array(
				'label'                     => _x( 'Hidden', 'post', 'bbpress' ),
				'label_count'               => _nx_noop( 'Hidden <span class="count">(%s)</span>', 'Hidden <span class="count">(%s)</span>', 'post', 'bbpress' ),
				'private'                   => true,
				'exclude_from_search'       => true,
				'show_in_admin_status_list' => true,
				'show_in_admin_all_list'    => true,
				'source'                    => 'bbpress'
			) )
		);

		/**
		 * Trash fix
		 *
		 * We need to remove the internal arg and change that to
		 * protected so that the users with 'view_trash' cap can view
		 * single trashed topics/replies in the front-end as wp_query
		 * doesn't allow any hack for the trashed topics to be viewed.
		 */
		global $wp_post_statuses;

		if ( ! empty( $wp_post_statuses['trash'] ) ) {

			// User can view trash so set internal to false
			if ( current_user_can( 'view_trash' ) ) {
				$wp_post_statuses['trash']->internal  = false;
				$wp_post_statuses['trash']->protected = true;

			// User cannot view trash so set internal to true
			} else {
				$wp_post_statuses['trash']->internal = true;
			}
		}
	}

	/**
	 * Register the topic tag and forum moderator taxonomies
	 *
	 * @since 2.0.0 bbPress (r2464) Added bbp_get_topic_tag_tax_id() taxonomy
	 */
	public static function register_taxonomies() {

		// Register the topic-tag taxonomy.
		register_taxonomy(
			bbp_get_topic_tag_tax_id(),
			bbp_get_topic_post_type(),
			apply_filters( 'bbp_register_topic_taxonomy', array(
				'labels'                => bbp_get_topic_tag_tax_labels(),
				'rewrite'               => bbp_get_topic_tag_tax_rewrite(),
				'capabilities'          => bbp_get_topic_tag_caps(),
				'update_count_callback' => 'bbp_update_topic_tag_count',
				'query_var'             => true,
				'show_tagcloud'         => true,
				'hierarchical'          => false,
				'show_in_nav_menus'     => false,
				'public'                => true,
				'show_ui'               => bbp_allow_topic_tags() && current_user_can( 'bbp_topic_tags_admin' ),
				'source'                => 'bbpress'
			)
		) );
	}

	/**
	 * Register the bbPress views
	 *
	 * @since 2.0.0 bbPress (r2789)
	 */
	public static function register_views() {

		// Popular topics
		bbp_register_view(
			'popular',
			esc_html__( 'Most popular topics', 'bbpress' ),
			apply_filters( 'bbp_register_view_popular', array(
				'meta_key'      => '_bbp_reply_count',
				'meta_type'     => 'NUMERIC',
				'max_num_pages' => 1,
				'orderby'       => 'meta_value_num',
				'show_stickies' => false
			)
		) );

		// Topics with no replies
		bbp_register_view(
			'no-replies',
			esc_html__( 'Topics with no replies', 'bbpress' ),
			apply_filters( 'bbp_register_view_no_replies', array(
				'meta_key'      => '_bbp_reply_count',
				'meta_type'     => 'NUMERIC',
				'meta_value'    => 1,
				'meta_compare'  => '<',
				'orderby'       => '',
				'show_stickies' => false
			)
		) );
	}

	/**
	 * Register the bbPress shortcodes
	 *
	 * @since 2.0.0 bbPress (r3031)
	 */
	public function register_shortcodes() {
		$this->shortcodes = new BBP_Shortcodes();
	}

	/**
	 * Register bbPress meta-data
	 *
	 * Counts added in 2.6.0 to avoid negative values
	 *
	 * @since 2.6.0 bbPress (r6300)
	 */
	public function register_meta() {

		// Define "count" meta-type array
		$count = array(

			// Counts are always integers
			'type'              => 'integer',

			// Generic count description
			'description'       => esc_html__( 'bbPress Item Count', 'bbpress' ),

			// Counts are single values
			'single'            => true,

			// Counts should be made available in REST
			'show_in_rest'      => true,

			// Never allow counts to go negative
			'sanitize_callback' => 'bbp_number_not_negative',

			// All users may update count meta data
			'auth_callback'     => '__return_true'
		);

		/** Post **************************************************************/

		// Counts
		register_meta( 'post', '_bbp_topic_count',           $count );
		register_meta( 'post', '_bbp_reply_count',           $count );
		register_meta( 'post', '_bbp_total_topic_count',     $count );
		register_meta( 'post', '_bbp_total_reply_count',     $count );
		register_meta( 'post', '_bbp_voice_count',           $count );
		register_meta( 'post', '_bbp_anonymous_reply_count', $count );
		register_meta( 'post', '_bbp_topic_count_hidden',    $count );
		register_meta( 'post', '_bbp_reply_count_hidden',    $count );
		register_meta( 'post', '_bbp_forum_subforum_count',  $count );

		/* User ***************************************************************/

		// Counts
		register_meta( 'user', '_bbp_topic_count', $count );
		register_meta( 'user', '_bbp_reply_count', $count );

		// Activity
		register_meta( 'user', '_bbp_last_posted', array(
			'type'              => 'integer',
			'description'       => esc_html__( 'bbPress User Activity', 'bbpress' ),
			'single'            => true,
			'show_in_rest'      => true,
			'sanitize_callback' => 'bbp_number_not_negative',
			'auth_callback'     => '__return_true'
		) );
	}

	/**
	 * Setup the currently logged-in user
	 *
	 * @since 2.0.0 bbPress (r2697)
	 */
	public function setup_current_user() {
		$this->current_user = wp_get_current_user();
	}

	/**
	 * Setup the user engagements strategy
	 *
	 * @since 2.6.0 bbPress (r6875)
	 */
	public function setup_engagements() {

		// Setup the class name
		$strategy   = ucwords( bbp_engagements_strategy() );
		$class_name = "BBP_User_Engagements_{$strategy}";

		// Setup the engagements interface
		$this->engagements = new $class_name();
	}

	/**
	 * Initialize forum-specific roles
	 *
	 * @since 2.6.0
	 */
	public function roles_init() {

		// Get role IDs
		$keymaster   = bbp_get_keymaster_role();
		$moderator   = bbp_get_moderator_role();
		$participant = bbp_get_participant_role();
		$spectator   = bbp_get_spectator_role();
		$blocked     = bbp_get_blocked_role();

		// Build the roles into one useful array
		$this->roles[ $keymaster   ] = new WP_Role( 'Keymaster',   bbp_get_caps_for_role( $keymaster   ) );
		$this->roles[ $moderator   ] = new WP_Role( 'Moderator',   bbp_get_caps_for_role( $moderator   ) );
		$this->roles[ $participant ] = new WP_Role( 'Participant', bbp_get_caps_for_role( $participant ) );
		$this->roles[ $spectator   ] = new WP_Role( 'Spectator',   bbp_get_caps_for_role( $spectator   ) );
		$this->roles[ $blocked     ] = new WP_Role( 'Blocked',     bbp_get_caps_for_role( $blocked     ) );
	}

	/** Custom Rewrite Rules **************************************************/

	/**
	 * Add the bbPress-specific rewrite tags
	 *
	 * @since 2.0.0 bbPress (r2753)
	 */
	public static function add_rewrite_tags() {
		add_rewrite_tag( '%' . bbp_get_view_rewrite_id()               . '%', '([^/]+)'   ); // View Page tag
		add_rewrite_tag( '%' . bbp_get_edit_rewrite_id()               . '%', '([1]{1,})' ); // Edit Page tag
		add_rewrite_tag( '%' . bbp_get_search_rewrite_id()             . '%', '([^/]+)'   ); // Search Results tag
		add_rewrite_tag( '%' . bbp_get_user_rewrite_id()               . '%', '([^/]+)'   ); // User Profile tag
		add_rewrite_tag( '%' . bbp_get_user_favorites_rewrite_id()     . '%', '([1]{1,})' ); // User Favorites tag
		add_rewrite_tag( '%' . bbp_get_user_subscriptions_rewrite_id() . '%', '([1]{1,})' ); // User Subscriptions tag
		add_rewrite_tag( '%' . bbp_get_user_engagements_rewrite_id()   . '%', '([1]{1,})' ); // User Engagements tag
		add_rewrite_tag( '%' . bbp_get_user_topics_rewrite_id()        . '%', '([1]{1,})' ); // User Topics Tag
		add_rewrite_tag( '%' . bbp_get_user_replies_rewrite_id()       . '%', '([1]{1,})' ); // User Replies Tag
	}

	/**
	 * Add bbPress-specific rewrite rules for uri's that are not
	 * setup for us by way of custom post types or taxonomies. This includes:
	 * - Front-end editing
	 * - Topic views
	 * - User profiles
	 *
	 * @since 2.0.0 bbPress (r2688)
	 *
	 * @todo Extract into an API
	 */
	public static function add_rewrite_rules() {

		/** Setup *************************************************************/

		// Add rules to top or bottom?
		$priority           = 'top';

		// Single Slugs
		$forum_slug         = bbp_get_forum_slug();
		$topic_slug         = bbp_get_topic_slug();
		$reply_slug         = bbp_get_reply_slug();
		$ttag_slug          = bbp_get_topic_tag_tax_slug();

		// Archive Slugs
		$user_slug          = bbp_get_user_slug();
		$view_slug          = bbp_get_view_slug();
		$search_slug        = bbp_get_search_slug();
		$topic_archive_slug = bbp_get_topic_archive_slug();
		$reply_archive_slug = bbp_get_reply_archive_slug();

		// Tertiary Slugs
		$feed_slug          = 'feed';
		$edit_slug          = bbp_get_edit_slug();
		$paged_slug         = bbp_get_paged_slug();
		$user_favs_slug     = bbp_get_user_favorites_slug();
		$user_subs_slug     = bbp_get_user_subscriptions_slug();
		$user_engs_slug     = bbp_get_user_engagements_slug();

		// Unique rewrite ID's
		$feed_id            = 'feed';
		$edit_id            = bbp_get_edit_rewrite_id();
		$view_id            = bbp_get_view_rewrite_id();
		$paged_id           = bbp_get_paged_rewrite_id();
		$search_id          = bbp_get_search_rewrite_id();
		$user_id            = bbp_get_user_rewrite_id();
		$user_favs_id       = bbp_get_user_favorites_rewrite_id();
		$user_subs_id       = bbp_get_user_subscriptions_rewrite_id();
		$user_tops_id       = bbp_get_user_topics_rewrite_id();
		$user_reps_id       = bbp_get_user_replies_rewrite_id();
		$user_engs_id       = bbp_get_user_engagements_rewrite_id();

		// Rewrite rule matches used repeatedly below
		$root_rule    = '/([^/]+)/?$';
		$feed_rule    = '/([^/]+)/' . $feed_slug  . '/?$';
		$edit_rule    = '/([^/]+)/' . $edit_slug  . '/?$';
		$paged_rule   = '/([^/]+)/' . $paged_slug . '/?([0-9]{1,})/?$';

		// Search rules (without slug check)
		$search_root_rule  = '/?$';
		$search_paged_rule = '/' . $paged_slug . '/?([0-9]{1,})/?$';

		/** Add ***************************************************************/

		// User profile rules
		$tops_rule       = '/([^/]+)/' . $topic_archive_slug . '/?$';
		$reps_rule       = '/([^/]+)/' . $reply_archive_slug . '/?$';
		$favs_rule       = '/([^/]+)/' . $user_favs_slug     . '/?$';
		$subs_rule       = '/([^/]+)/' . $user_subs_slug     . '/?$';
		$engs_rule       = '/([^/]+)/' . $user_engs_slug     . '/?$';
		$tops_paged_rule = '/([^/]+)/' . $topic_archive_slug . '/' . $paged_slug . '/?([0-9]{1,})/?$';
		$reps_paged_rule = '/([^/]+)/' . $reply_archive_slug . '/' . $paged_slug . '/?([0-9]{1,})/?$';
		$favs_paged_rule = '/([^/]+)/' . $user_favs_slug     . '/' . $paged_slug . '/?([0-9]{1,})/?$';
		$subs_paged_rule = '/([^/]+)/' . $user_subs_slug     . '/' . $paged_slug . '/?([0-9]{1,})/?$';
		$engs_paged_rule = '/([^/]+)/' . $user_engs_slug     . '/' . $paged_slug . '/?([0-9]{1,})/?$';

		// Edit Forum|Topic|Reply|Topic-tag
		add_rewrite_rule( $forum_slug . $edit_rule, 'index.php?' . bbp_get_forum_post_type()  . '=$matches[1]&' . $edit_id . '=1', $priority );
		add_rewrite_rule( $topic_slug . $edit_rule, 'index.php?' . bbp_get_topic_post_type()  . '=$matches[1]&' . $edit_id . '=1', $priority );
		add_rewrite_rule( $reply_slug . $edit_rule, 'index.php?' . bbp_get_reply_post_type()  . '=$matches[1]&' . $edit_id . '=1', $priority );
		add_rewrite_rule( $ttag_slug  . $edit_rule, 'index.php?' . bbp_get_topic_tag_tax_id() . '=$matches[1]&' . $edit_id . '=1', $priority );

		// User Pagination|Edit|View
		add_rewrite_rule( $user_slug . $tops_paged_rule, 'index.php?' . $user_id  . '=$matches[1]&' . $user_tops_id . '=1&' . $paged_id . '=$matches[2]', $priority );
		add_rewrite_rule( $user_slug . $reps_paged_rule, 'index.php?' . $user_id  . '=$matches[1]&' . $user_reps_id . '=1&' . $paged_id . '=$matches[2]', $priority );
		add_rewrite_rule( $user_slug . $favs_paged_rule, 'index.php?' . $user_id  . '=$matches[1]&' . $user_favs_id . '=1&' . $paged_id . '=$matches[2]', $priority );
		add_rewrite_rule( $user_slug . $subs_paged_rule, 'index.php?' . $user_id  . '=$matches[1]&' . $user_subs_id . '=1&' . $paged_id . '=$matches[2]', $priority );
		add_rewrite_rule( $user_slug . $engs_paged_rule, 'index.php?' . $user_id  . '=$matches[1]&' . $user_engs_id . '=1&' . $paged_id . '=$matches[2]', $priority );
		add_rewrite_rule( $user_slug . $tops_rule,       'index.php?' . $user_id  . '=$matches[1]&' . $user_tops_id . '=1',                               $priority );
		add_rewrite_rule( $user_slug . $reps_rule,       'index.php?' . $user_id  . '=$matches[1]&' . $user_reps_id . '=1',                               $priority );
		add_rewrite_rule( $user_slug . $favs_rule,       'index.php?' . $user_id  . '=$matches[1]&' . $user_favs_id . '=1',                               $priority );
		add_rewrite_rule( $user_slug . $subs_rule,       'index.php?' . $user_id  . '=$matches[1]&' . $user_subs_id . '=1',                               $priority );
		add_rewrite_rule( $user_slug . $engs_rule,       'index.php?' . $user_id  . '=$matches[1]&' . $user_engs_id . '=1',                               $priority );
		add_rewrite_rule( $user_slug . $edit_rule,       'index.php?' . $user_id  . '=$matches[1]&' . $edit_id      . '=1',                               $priority );
		add_rewrite_rule( $user_slug . $root_rule,       'index.php?' . $user_id  . '=$matches[1]',                                                       $priority );

		// Topic-View Pagination|Feed|View
		add_rewrite_rule( $view_slug . $paged_rule, 'index.php?' . $view_id . '=$matches[1]&' . $paged_id . '=$matches[2]', $priority );
		add_rewrite_rule( $view_slug . $feed_rule,  'index.php?' . $view_id . '=$matches[1]&' . $feed_id  . '=$matches[2]', $priority );
		add_rewrite_rule( $view_slug . $root_rule,  'index.php?' . $view_id . '=$matches[1]',                               $priority );

		// Search All
		add_rewrite_rule( $search_slug . $search_paged_rule, 'index.php?' . $paged_id .'=$matches[1]', $priority );
		add_rewrite_rule( $search_slug . $search_root_rule,  'index.php?' . $search_id,                $priority );
	}

	/**
	 * Add permalink structures for new archive-style destinations.
	 *
	 * - Users
	 * - Topic Views
	 * - Search
	 *
	 * @since 2.4.0 bbPress (r4930)
	 */
	public static function add_permastructs() {

		// Get unique ID's
		$user_id     = bbp_get_user_rewrite_id();
		$view_id     = bbp_get_view_rewrite_id();
		$search_id   = bbp_get_search_rewrite_id();

		// Get root slugs
		$user_slug   = bbp_get_user_slug();
		$view_slug   = bbp_get_view_slug();
		$search_slug = bbp_get_search_slug();

		// User Permastruct
		add_permastruct( $user_id, $user_slug . '/%' . $user_id . '%', array(
			'with_front'  => false,
			'ep_mask'     => EP_NONE,
			'paged'       => false,
			'feed'        => false,
			'forcomments' => false,
			'walk_dirs'   => true,
			'endpoints'   => false,
		) );

		// Topic View Permastruct
		add_permastruct( $view_id, $view_slug . '/%' . $view_id . '%', array(
			'with_front'  => false,
			'ep_mask'     => EP_NONE,
			'paged'       => false,
			'feed'        => false,
			'forcomments' => false,
			'walk_dirs'   => true,
			'endpoints'   => false,
		) );

		// Search Permastruct
		add_permastruct( $search_id, $search_slug . '/%' . $search_id . '%', array(
			'with_front'  => false,
			'ep_mask'     => EP_NONE,
			'paged'       => true,
			'feed'        => false,
			'forcomments' => false,
			'walk_dirs'   => true,
			'endpoints'   => false,
		) );
	}
}

/**
 * The main function responsible for returning the one true bbPress Instance
 * to functions everywhere.
 *
 * Use this function like you would a global variable, except without needing
 * to declare the global.
 *
 * Example: <?php $bbp = bbpress(); ?>
 *
 * @since 2.0.0 bbPress (r2464)
 *
 * @return bbPress The one true bbPress Instance
 */
function bbpress() {
	return bbPress::instance();
}

/**
 * Hook bbPress early onto the 'plugins_loaded' action.
 *
 * This gives all other plugins the chance to load before bbPress, to get their
 * actions, filters, and overrides setup without bbPress being in the way.
 */
if ( defined( 'BBPRESS_LATE_LOAD' ) ) {
	add_action( 'plugins_loaded', 'bbpress', (int) BBPRESS_LATE_LOAD );

// "And now here's something we hope you'll really like!"
} else {
	bbpress();
}

endif; // class_exists check
