diff -r 490d5cc509ed -r cf61fcea0001 wp/wp-includes/class-wp-taxonomy.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-includes/class-wp-taxonomy.php	Mon Oct 14 17:39:30 2019 +0200
@@ -0,0 +1,424 @@
+<?php
+/**
+ * Taxonomy API: WP_Taxonomy class
+ *
+ * @package WordPress
+ * @subpackage Taxonomy
+ * @since 4.7.0
+ */
+
+/**
+ * Core class used for interacting with taxonomies.
+ *
+ * @since 4.7.0
+ */
+final class WP_Taxonomy {
+	/**
+	 * Taxonomy key.
+	 *
+	 * @since 4.7.0
+	 * @var string
+	 */
+	public $name;
+
+	/**
+	 * Name of the taxonomy shown in the menu. Usually plural.
+	 *
+	 * @since 4.7.0
+	 * @var string
+	 */
+	public $label;
+
+	/**
+	 * An array of labels for this taxonomy.
+	 *
+	 * @since 4.7.0
+	 * @var object
+	 */
+	public $labels = array();
+
+	/**
+	 * A short descriptive summary of what the taxonomy is for.
+	 *
+	 * @since 4.7.0
+	 * @var string
+	 */
+	public $description = '';
+
+	/**
+	 * Whether a taxonomy is intended for use publicly either via the admin interface or by front-end users.
+	 *
+	 * @since 4.7.0
+	 * @var bool
+	 */
+	public $public = true;
+
+	/**
+	 * Whether the taxonomy is publicly queryable.
+	 *
+	 * @since 4.7.0
+	 * @var bool
+	 */
+	public $publicly_queryable = true;
+
+	/**
+	 * Whether the taxonomy is hierarchical.
+	 *
+	 * @since 4.7.0
+	 * @var bool
+	 */
+	public $hierarchical = false;
+
+	/**
+	 * Whether to generate and allow a UI for managing terms in this taxonomy in the admin.
+	 *
+	 * @since 4.7.0
+	 * @var bool
+	 */
+	public $show_ui = true;
+
+	/**
+	 * Whether to show the taxonomy in the admin menu.
+	 *
+	 * If true, the taxonomy is shown as a submenu of the object type menu. If false, no menu is shown.
+	 *
+	 * @since 4.7.0
+	 * @var bool
+	 */
+	public $show_in_menu = true;
+
+	/**
+	 * Whether the taxonomy is available for selection in navigation menus.
+	 *
+	 * @since 4.7.0
+	 * @var bool
+	 */
+	public $show_in_nav_menus = true;
+
+	/**
+	 * Whether to list the taxonomy in the tag cloud widget controls.
+	 *
+	 * @since 4.7.0
+	 * @var bool
+	 */
+	public $show_tagcloud = true;
+
+	/**
+	 * Whether to show the taxonomy in the quick/bulk edit panel.
+	 *
+	 * @since 4.7.0
+	 * @var bool
+	 */
+	public $show_in_quick_edit = true;
+
+	/**
+	 * Whether to display a column for the taxonomy on its post type listing screens.
+	 *
+	 * @since 4.7.0
+	 * @var bool
+	 */
+	public $show_admin_column = false;
+
+	/**
+	 * The callback function for the meta box display.
+	 *
+	 * @since 4.7.0
+	 * @var bool|callable
+	 */
+	public $meta_box_cb = null;
+
+	/**
+	 * An array of object types this taxonomy is registered for.
+	 *
+	 * @since 4.7.0
+	 * @var array
+	 */
+	public $object_type = null;
+
+	/**
+	 * Capabilities for this taxonomy.
+	 *
+	 * @since 4.7.0
+	 * @var array
+	 */
+	public $cap;
+
+	/**
+	 * Rewrites information for this taxonomy.
+	 *
+	 * @since 4.7.0
+	 * @var array|false
+	 */
+	public $rewrite;
+
+	/**
+	 * Query var string for this taxonomy.
+	 *
+	 * @since 4.7.0
+	 * @var string|false
+	 */
+	public $query_var;
+
+	/**
+	 * Function that will be called when the count is updated.
+	 *
+	 * @since 4.7.0
+	 * @var callable
+	 */
+	public $update_count_callback;
+
+	/**
+	 * Whether this taxonomy should appear in the REST API.
+	 *
+	 * Default false. If true, standard endpoints will be registered with
+	 * respect to $rest_base and $rest_controller_class.
+	 *
+	 * @since 4.7.4
+	 * @var bool $show_in_rest
+	 */
+	public $show_in_rest;
+
+	/**
+	 * The base path for this taxonomy's REST API endpoints.
+	 *
+	 * @since 4.7.4
+	 * @var string|bool $rest_base
+	 */
+	public $rest_base;
+
+	/**
+	 * The controller for this taxonomy's REST API endpoints.
+	 *
+	 * Custom controllers must extend WP_REST_Controller.
+	 *
+	 * @since 4.7.4
+	 * @var string|bool $rest_controller_class
+	 */
+	public $rest_controller_class;
+
+	/**
+	 * Whether it is a built-in taxonomy.
+	 *
+	 * @since 4.7.0
+	 * @var bool
+	 */
+	public $_builtin;
+
+	/**
+	 * Constructor.
+	 *
+	 * @since 4.7.0
+	 *
+	 * @global WP $wp WP instance.
+	 *
+	 * @param string       $taxonomy    Taxonomy key, must not exceed 32 characters.
+	 * @param array|string $object_type Name of the object type for the taxonomy object.
+	 * @param array|string $args        Optional. Array or query string of arguments for registering a taxonomy.
+	 *                                  Default empty array.
+	 */
+	public function __construct( $taxonomy, $object_type, $args = array() ) {
+		$this->name = $taxonomy;
+
+		$this->set_props( $object_type, $args );
+	}
+
+	/**
+	 * Sets taxonomy properties.
+	 *
+	 * @since 4.7.0
+	 *
+	 * @param array|string $object_type Name of the object type for the taxonomy object.
+	 * @param array|string $args        Array or query string of arguments for registering a taxonomy.
+	 */
+	public function set_props( $object_type, $args ) {
+		$args = wp_parse_args( $args );
+
+		/**
+		 * Filters the arguments for registering a taxonomy.
+		 *
+		 * @since 4.4.0
+		 *
+		 * @param array  $args        Array of arguments for registering a taxonomy.
+		 * @param string $taxonomy    Taxonomy key.
+		 * @param array  $object_type Array of names of object types for the taxonomy.
+		 */
+		$args = apply_filters( 'register_taxonomy_args', $args, $this->name, (array) $object_type );
+
+		$defaults = array(
+			'labels'                => array(),
+			'description'           => '',
+			'public'                => true,
+			'publicly_queryable'    => null,
+			'hierarchical'          => false,
+			'show_ui'               => null,
+			'show_in_menu'          => null,
+			'show_in_nav_menus'     => null,
+			'show_tagcloud'         => null,
+			'show_in_quick_edit'    => null,
+			'show_admin_column'     => false,
+			'meta_box_cb'           => null,
+			'capabilities'          => array(),
+			'rewrite'               => true,
+			'query_var'             => $this->name,
+			'update_count_callback' => '',
+			'show_in_rest'          => false,
+			'rest_base'             => false,
+			'rest_controller_class' => false,
+			'_builtin'              => false,
+		);
+
+		$args = array_merge( $defaults, $args );
+
+		// If not set, default to the setting for public.
+		if ( null === $args['publicly_queryable'] ) {
+			$args['publicly_queryable'] = $args['public'];
+		}
+
+		if ( false !== $args['query_var'] && ( is_admin() || false !== $args['publicly_queryable'] ) ) {
+			if ( true === $args['query_var'] ) {
+				$args['query_var'] = $this->name;
+			} else {
+				$args['query_var'] = sanitize_title_with_dashes( $args['query_var'] );
+			}
+		} else {
+			// Force query_var to false for non-public taxonomies.
+			$args['query_var'] = false;
+		}
+
+		if ( false !== $args['rewrite'] && ( is_admin() || '' != get_option( 'permalink_structure' ) ) ) {
+			$args['rewrite'] = wp_parse_args( $args['rewrite'], array(
+				'with_front'   => true,
+				'hierarchical' => false,
+				'ep_mask'      => EP_NONE,
+			) );
+
+			if ( empty( $args['rewrite']['slug'] ) ) {
+				$args['rewrite']['slug'] = sanitize_title_with_dashes( $this->name );
+			}
+		}
+
+		// If not set, default to the setting for public.
+		if ( null === $args['show_ui'] ) {
+			$args['show_ui'] = $args['public'];
+		}
+
+		// If not set, default to the setting for show_ui.
+		if ( null === $args['show_in_menu'] || ! $args['show_ui'] ) {
+			$args['show_in_menu'] = $args['show_ui'];
+		}
+
+		// If not set, default to the setting for public.
+		if ( null === $args['show_in_nav_menus'] ) {
+			$args['show_in_nav_menus'] = $args['public'];
+		}
+
+		// If not set, default to the setting for show_ui.
+		if ( null === $args['show_tagcloud'] ) {
+			$args['show_tagcloud'] = $args['show_ui'];
+		}
+
+		// If not set, default to the setting for show_ui.
+		if ( null === $args['show_in_quick_edit'] ) {
+			$args['show_in_quick_edit'] = $args['show_ui'];
+		}
+
+		$default_caps = array(
+			'manage_terms' => 'manage_categories',
+			'edit_terms'   => 'manage_categories',
+			'delete_terms' => 'manage_categories',
+			'assign_terms' => 'edit_posts',
+		);
+
+		$args['cap'] = (object) array_merge( $default_caps, $args['capabilities'] );
+		unset( $args['capabilities'] );
+
+		$args['object_type'] = array_unique( (array) $object_type );
+
+		// If not set, use the default meta box
+		if ( null === $args['meta_box_cb'] ) {
+			if ( $args['hierarchical'] ) {
+				$args['meta_box_cb'] = 'post_categories_meta_box';
+			} else {
+				$args['meta_box_cb'] = 'post_tags_meta_box';
+			}
+		}
+
+		$args['name'] = $this->name;
+
+		foreach ( $args as $property_name => $property_value ) {
+			$this->$property_name = $property_value;
+		}
+
+		$this->labels = get_taxonomy_labels( $this );
+		$this->label = $this->labels->name;
+	}
+
+	/**
+	 * Adds the necessary rewrite rules for the taxonomy.
+	 *
+	 * @since 4.7.0
+	 *
+	 * @global WP $wp Current WordPress environment instance.
+	 */
+	public function add_rewrite_rules() {
+		/* @var WP $wp */
+		global $wp;
+
+		// Non-publicly queryable taxonomies should not register query vars, except in the admin.
+		if ( false !== $this->query_var && $wp ) {
+			$wp->add_query_var( $this->query_var );
+		}
+
+		if ( false !== $this->rewrite && ( is_admin() || '' != get_option( 'permalink_structure' ) ) ) {
+			if ( $this->hierarchical && $this->rewrite['hierarchical'] ) {
+				$tag = '(.+?)';
+			} else {
+				$tag = '([^/]+)';
+			}
+
+			add_rewrite_tag( "%$this->name%", $tag, $this->query_var ? "{$this->query_var}=" : "taxonomy=$this->name&term=" );
+			add_permastruct( $this->name, "{$this->rewrite['slug']}/%$this->name%", $this->rewrite );
+		}
+	}
+
+	/**
+	 * Removes any rewrite rules, permastructs, and rules for the taxonomy.
+	 *
+	 * @since 4.7.0
+	 *
+	 * @global WP $wp Current WordPress environment instance.
+	 */
+	public function remove_rewrite_rules() {
+		/* @var WP $wp */
+		global $wp;
+
+		// Remove query var.
+		if ( false !== $this->query_var ) {
+			$wp->remove_query_var( $this->query_var );
+		}
+
+		// Remove rewrite tags and permastructs.
+		if ( false !== $this->rewrite ) {
+			remove_rewrite_tag( "%$this->name%" );
+			remove_permastruct( $this->name );
+		}
+	}
+
+	/**
+	 * Registers the ajax callback for the meta box.
+	 *
+	 * @since 4.7.0
+	 */
+	public function add_hooks() {
+		add_filter( 'wp_ajax_add-' . $this->name, '_wp_ajax_add_hierarchical_term' );
+	}
+
+	/**
+	 * Removes the ajax callback for the meta box.
+	 *
+	 * @since 4.7.0
+	 */
+	public function remove_hooks() {
+		remove_filter( 'wp_ajax_add-' . $this->name, '_wp_ajax_add_hierarchical_term' );
+	}
+}