297 lines
6.8 KiB
PHP
297 lines
6.8 KiB
PHP
<?php
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/**
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* User API: WP_Roles class
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*
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* @package WordPress
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* @subpackage Users
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* @since 4.4.0
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*/
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/**
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* Core class used to implement a user roles API.
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*
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* The role option is simple, the structure is organized by role name that store
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* the name in value of the 'name' key. The capabilities are stored as an array
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* in the value of the 'capability' key.
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*
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* array (
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* 'rolename' => array (
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* 'name' => 'rolename',
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* 'capabilities' => array()
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* )
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* )
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*
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* @since 2.0.0
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*/
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class WP_Roles {
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/**
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* List of roles and capabilities.
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*
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* @since 2.0.0
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* @access public
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* @var array
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*/
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public $roles;
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/**
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* List of the role objects.
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*
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* @since 2.0.0
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* @access public
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* @var array
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*/
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public $role_objects = array();
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/**
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* List of role names.
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*
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* @since 2.0.0
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* @access public
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* @var array
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*/
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public $role_names = array();
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/**
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* Option name for storing role list.
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*
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* @since 2.0.0
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* @access public
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* @var string
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*/
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public $role_key;
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/**
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* Whether to use the database for retrieval and storage.
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*
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* @since 2.1.0
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* @access public
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* @var bool
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*/
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public $use_db = true;
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/**
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* Constructor
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*
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* @since 2.0.0
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*/
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public function __construct() {
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$this->_init();
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}
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/**
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* Make private/protected methods readable for backward compatibility.
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*
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* @since 4.0.0
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* @access public
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*
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* @param callable $name Method to call.
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* @param array $arguments Arguments to pass when calling.
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* @return mixed|false Return value of the callback, false otherwise.
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*/
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public function __call( $name, $arguments ) {
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if ( '_init' === $name ) {
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return call_user_func_array( array( $this, $name ), $arguments );
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}
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return false;
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}
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/**
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* Set up the object properties.
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*
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* The role key is set to the current prefix for the $wpdb object with
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* 'user_roles' appended. If the $wp_user_roles global is set, then it will
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* be used and the role option will not be updated or used.
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*
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* @since 2.1.0
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* @access protected
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*
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* @global wpdb $wpdb WordPress database abstraction object.
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* @global array $wp_user_roles Used to set the 'roles' property value.
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*/
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protected function _init() {
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global $wpdb, $wp_user_roles;
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$this->role_key = $wpdb->get_blog_prefix() . 'user_roles';
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if ( ! empty( $wp_user_roles ) ) {
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$this->roles = $wp_user_roles;
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$this->use_db = false;
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} else {
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$this->roles = get_option( $this->role_key );
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}
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if ( empty( $this->roles ) )
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return;
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$this->role_objects = array();
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$this->role_names = array();
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foreach ( array_keys( $this->roles ) as $role ) {
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$this->role_objects[$role] = new WP_Role( $role, $this->roles[$role]['capabilities'] );
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$this->role_names[$role] = $this->roles[$role]['name'];
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}
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}
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/**
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* Reinitialize the object
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*
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* Recreates the role objects. This is typically called only by switch_to_blog()
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* after switching wpdb to a new site ID.
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*
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* @since 3.5.0
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* @access public
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*
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* @global wpdb $wpdb WordPress database abstraction object.
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*/
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public function reinit() {
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// There is no need to reinit if using the wp_user_roles global.
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if ( ! $this->use_db )
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return;
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global $wpdb;
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// Duplicated from _init() to avoid an extra function call.
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$this->role_key = $wpdb->get_blog_prefix() . 'user_roles';
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$this->roles = get_option( $this->role_key );
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if ( empty( $this->roles ) )
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return;
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$this->role_objects = array();
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$this->role_names = array();
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foreach ( array_keys( $this->roles ) as $role ) {
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$this->role_objects[$role] = new WP_Role( $role, $this->roles[$role]['capabilities'] );
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$this->role_names[$role] = $this->roles[$role]['name'];
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}
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}
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/**
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* Add role name with capabilities to list.
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*
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* Updates the list of roles, if the role doesn't already exist.
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*
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* The capabilities are defined in the following format `array( 'read' => true );`
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* To explicitly deny a role a capability you set the value for that capability to false.
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*
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* @since 2.0.0
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* @access public
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*
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* @param string $role Role name.
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* @param string $display_name Role display name.
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* @param array $capabilities List of role capabilities in the above format.
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* @return WP_Role|void WP_Role object, if role is added.
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*/
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public function add_role( $role, $display_name, $capabilities = array() ) {
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if ( empty( $role ) || isset( $this->roles[ $role ] ) ) {
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return;
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}
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$this->roles[$role] = array(
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'name' => $display_name,
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'capabilities' => $capabilities
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);
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if ( $this->use_db )
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update_option( $this->role_key, $this->roles );
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$this->role_objects[$role] = new WP_Role( $role, $capabilities );
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$this->role_names[$role] = $display_name;
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return $this->role_objects[$role];
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}
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/**
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* Remove role by name.
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*
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* @since 2.0.0
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* @access public
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*
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* @param string $role Role name.
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*/
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public function remove_role( $role ) {
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if ( ! isset( $this->role_objects[$role] ) )
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return;
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unset( $this->role_objects[$role] );
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unset( $this->role_names[$role] );
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unset( $this->roles[$role] );
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if ( $this->use_db )
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update_option( $this->role_key, $this->roles );
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if ( get_option( 'default_role' ) == $role )
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update_option( 'default_role', 'subscriber' );
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}
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/**
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* Add capability to role.
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*
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* @since 2.0.0
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* @access public
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*
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* @param string $role Role name.
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* @param string $cap Capability name.
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* @param bool $grant Optional, default is true. Whether role is capable of performing capability.
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*/
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public function add_cap( $role, $cap, $grant = true ) {
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if ( ! isset( $this->roles[$role] ) )
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return;
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$this->roles[$role]['capabilities'][$cap] = $grant;
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if ( $this->use_db )
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update_option( $this->role_key, $this->roles );
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}
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/**
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* Remove capability from role.
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*
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* @since 2.0.0
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* @access public
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*
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* @param string $role Role name.
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* @param string $cap Capability name.
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*/
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public function remove_cap( $role, $cap ) {
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if ( ! isset( $this->roles[$role] ) )
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return;
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unset( $this->roles[$role]['capabilities'][$cap] );
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if ( $this->use_db )
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update_option( $this->role_key, $this->roles );
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}
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/**
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* Retrieve role object by name.
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*
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* @since 2.0.0
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* @access public
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*
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* @param string $role Role name.
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* @return WP_Role|null WP_Role object if found, null if the role does not exist.
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*/
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public function get_role( $role ) {
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if ( isset( $this->role_objects[$role] ) )
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return $this->role_objects[$role];
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else
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return null;
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}
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/**
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* Retrieve list of role names.
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*
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* @since 2.0.0
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* @access public
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*
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* @return array List of role names.
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*/
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public function get_names() {
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return $this->role_names;
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}
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/**
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* Whether role name is currently in the list of available roles.
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*
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* @since 2.0.0
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* @access public
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*
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* @param string $role Role name to look up.
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* @return bool
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*/
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public function is_role( $role ) {
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return isset( $this->role_names[$role] );
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}
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}
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