<?php
/**
* User API: WP_User class
*
* @package WordPress
* @subpackage Users
* @since 4.4.0
*/

/**
* Core class used to implement the WP_User object.
*
* @since 2.0.0
*
* @property string $nickname
* @property string $description
* @property string $user_description
* @property string $first_name
* @property string $user_firstname
* @property string $last_name
* @property string $user_lastname
* @property string $user_login
* @property string $user_pass
* @property string $user_nicename
* @property string $user_email
* @property string $user_url
* @property string $user_registered
* @property string $user_activation_key
* @property string $user_status
* @property int $user_level
* @property string $display_name
* @property string $spam
* @property string $deleted
* @property string $locale
* @property string $rich_editing
* @property string $syntax_highlighting
* @property string $use_ssl
*/
#[AllowDynamicProperties]
class WP_User {
/**
* User data container.
*
* @since 2.0.0
* @var stdClass
*/
public $data;

/**
* The user's ID.
*
* @since 2.1.0
* @var int
*/
public $ID = 0;

/**
* Capabilities that the individual user has been granted outside of those inherited from their role.
*
* @since 2.0.0
* @var bool[] Array of key/value pairs where keys represent a capability name
* and boolean values represent whether the user has that capability.
*/
public $caps = array();

/**
* User metadata option name.
*
* @since 2.0.0
* @var string
*/
public $cap_key;

/**
* The roles the user is part of.
*
* @since 2.0.0
* @var string[]
*/
public $roles = array();

/**
* All capabilities the user has, including individual and role based.
*
* @since 2.0.0
* @var bool[] Array of key/value pairs where keys represent a capability name
* and boolean values represent whether the user has that capability.
*/
public $allcaps = array();

/**
* The filter context applied to user data fields.
*
* @since 2.9.0
* @var string
*/
public $filter = null;

/**
* The site ID the capabilities of this user are initialized for.
*
* @since 4.9.0
* @var int
*/
private $site_id = 0;

/**
* @since 3.3.0
* @var array
*/
private static $back_compat_keys;

/**
* Constructor.
*
* Retrieves the userdata and passes it to WP_User::init().
*
* @since 2.0.0
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param int|string|stdClass|WP_User $id User's ID, a WP_User object, or a user object from the DB.
* @param string $name Optional. User's username
* @param int $site_id Optional Site ID, defaults to current site.
*/
public function __construct( $id = 0, $name = '', $site_id = '' ) {
global $wpdb;

if ( ! isset( self::$back_compat_keys ) ) {
$prefix = $wpdb->prefix;

self::$back_compat_keys = array(
'user_firstname' => 'first_name',
'user_lastname' => 'last_name',
'user_description' => 'description',
'user_level' => $prefix . 'user_level',
$prefix . 'usersettings' => $prefix . 'user-settings',
$prefix . 'usersettingstime' => $prefix . 'user-settings-time',
);
}

if ( $id instanceof WP_User ) {
$this->init( $id->data, $site_id );
return;
} elseif ( is_object( $id ) ) {
$this->init( $id, $site_id );
return;
}

if ( ! empty( $id ) && ! is_numeric( $id ) ) {
$name = $id;
$id = 0;
}

if ( $id ) {
$data = self::get_data_by( 'id', $id );
} else {
$data = self::get_data_by( 'login', $name );
}

if ( $data ) {
$this->init( $data, $site_id );
} else {
$this->data = new stdClass();
}
}

/**
* Sets up object properties, including capabilities.
*
* @since 3.3.0
*
* @param object $data User DB row object.
* @param int $site_id Optional. The site ID to initialize for.
*/
public function init( $data, $site_id = '' ) {
if ( ! isset( $data->ID ) ) {
$data->ID = 0;
}
$this->data = $data;
$this->ID = (int) $data->ID;

$this->for_site( $site_id );
}

/**
* Returns only the main user fields.
*
* @since 3.3.0
* @since 4.4.0 Added 'ID' as an alias of 'id' for the `$field` parameter.
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param string $field The field to query against: Accepts 'id', 'ID', 'slug', 'email' or 'login'.
* @param string|int $value The field value.
* @return object|false Raw user object.
*/
public static function get_data_by( $field, $value ) {
global $wpdb;

// 'ID' is an alias of 'id'.
if ( 'ID' === $field ) {
$field = 'id';
}

if ( 'id' === $field ) {
// Make sure the value is numeric to avoid casting objects, for example, to int 1.
if ( ! is_numeric( $value ) ) {
return false;
}
$value = (int) $value;
if ( $value < 1 ) {
return false;
}
} else {
$value = trim( $value );
}

if ( ! $value ) {
return false;
}

switch ( $field ) {
case 'id':
$user_id = $value;
$db_field = 'ID';
break;
case 'slug':
$user_id = wp_cache_get( $value, 'userslugs' );
$db_field = 'user_nicename';
break;
case 'email':
$user_id = wp_cache_get( $value, 'useremail' );
$db_field = 'user_email';
break;
case 'login':
$value = sanitize_user( $value );
$user_id = wp_cache_get( $value, 'userlogins' );
$db_field = 'user_login';
break;
default:
return false;
}

if ( false !== $user_id ) {
$user = wp_cache_get( $user_id, 'users' );
if ( $user ) {
return $user;
}
}

$user = $wpdb->get_row(
$wpdb->prepare(
"SELECT * FROM $wpdb->users WHERE $db_field = %s LIMIT 1",
$value
)
);
if ( ! $user ) {
return false;
}

update_user_caches( $user );

return $user;
}

/**
* Magic method for checking the existence of a certain custom field.
*
* @since 3.3.0
*
* @param string $key User meta key to check if set.
* @return bool Whether the given user meta key is set.
*/
public function __isset( $key ) {
if ( 'id' === $key ) {
_deprecated_argument(
'WP_User->id',
'2.1.0',
sprintf(
/* translators: %s: WP_User->ID */
__( 'Use %s instead.' ),
'<code>WP_User->ID</code>'
)
);
$key = 'ID';
}

if ( isset( $this->data->$key ) ) {
return true;
}

if ( isset( self::$back_compat_keys[ $key ] ) ) {
$key = self::$back_compat_keys[ $key ];
}

return metadata_exists( 'user', $this->ID, $key );
}

/**
* Magic method for accessing custom fields.
*
* @since 3.3.0
*
* @param string $key User meta key to retrieve.
* @return mixed Value of the given user meta key (if set). If `$key` is 'id', the user ID.
*/
public function __get( $key ) {
if ( 'id' === $key ) {
_deprecated_argument(
'WP_User->id',
'2.1.0',
sprintf(
/* translators: %s: WP_User->ID */
__( 'Use %s instead.' ),
'<code>WP_User->ID</code>'
)
);
return $this->ID;
}

if ( isset( $this->data->$key ) ) {
$value = $this->data->$key;
} else {
if ( isset( self::$back_compat_keys[ $key ] ) ) {
$key = self::$back_compat_keys[ $key ];
}
$value = get_user_meta( $this->ID, $key, true );
}

if ( $this->filter ) {
$value = sanitize_user_field( $key, $value, $this->ID, $this->filter );
}

return $value;
}

/**
* Magic method for setting custom user fields.
*
* This method does not update custom fields in the database. It only stores
* the value on the WP_User instance.
*
* @since 3.3.0
*
* @param string $key User meta key.
* @param mixed $value User meta value.
*/
public function __set( $key, $value ) {
if ( 'id' === $key ) {
_deprecated_argument(
'WP_User->id',
'2.1.0',
sprintf(
/* translators: %s: WP_User->ID */
__( 'Use %s instead.' ),
'<code>WP_User->ID</code>'
)
);
$this->ID = $value;
return;
}

$this->data->$key = $value;
}

/**
* Magic method for unsetting a certain custom field.
*
* @since 4.4.0
*
* @param string $key User meta key to unset.
*/
public function __unset( $key ) {
if ( 'id' === $key ) {
_deprecated_argument(
'WP_User->id',
'2.1.0',
sprintf(
/* translators: %s: WP_User->ID */
__( 'Use %s instead.' ),
'<code>WP_User->ID</code>'
)
);
}

if ( isset( $this->data->$key ) ) {
unset( $this->data->$key );
}

if ( isset( self::$back_compat_keys[ $key ] ) ) {
unset( self::$back_compat_keys[ $key ] );
}
}

/**
* Determines whether the user exists in the database.
*
* @since 3.4.0
*
* @return bool True if user exists in the database, false if not.
*/
public function exists() {
return ! empty( $this->ID );
}

/**
* Retrieves the value of a property or meta key.
*
* Retrieves from the users and usermeta table.
*
* @since 3.3.0
*
* @param string $key Property
* @return mixed
*/
public function get( $key ) {
return $this->__get( $key );
}

/**
* Determines whether a property or meta key is set.
*
* Consults the users and usermeta tables.
*
* @since 3.3.0
*
* @param string $key Property.
* @return bool
*/
public function has_prop( $key ) {
return $this->__isset( $key );
}

/**
* Returns an array representation.
*
* @since 3.5.0
*
* @return array Array representation.
*/
public function to_array() {
return get_object_vars( $this->data );
}

/**
* Makes private/protected methods readable for backward compatibility.
*
* @since 4.3.0
*
* @param string $name Method to call.
* @param array $arguments Arguments to pass when calling.
* @return mixed|false Return value of the callback, false otherwise.
*/
public function __call( $name, $arguments ) {
if ( '_init_caps' === $name ) {
return $this->_init_caps( ...$arguments );
}
return false;
}

/**
* Sets up capability object properties.
*
* Will set the value for the 'cap_key' property to current database table
* prefix, followed by 'capabilities'. Will then check to see if the
* property matching the 'cap_key' exists and is an array. If so, it will be
* used.
*
* @since 2.1.0
* @deprecated 4.9.0 Use WP_User::for_site()
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param string $cap_key Optional capability key
*/
protected function _init_caps( $cap_key = '' ) {
global $wpdb;

_deprecated_function( __METHOD__, '4.9.0', 'WP_User::for_site()' );

if ( empty( $cap_key ) ) {
$this->cap_key = $wpdb->get_blog_prefix( $this->site_id ) . 'capabilities';
} else {
$this->cap_key = $cap_key;
}

$this->caps = $this->get_caps_data();

$this->get_role_caps();
}

/**
* Retrieves all of the capabilities of the user's roles, and merges them with
* individual user capabilities.
*
* All of the capabilities of the user's roles are merged with the user's individual
* capabilities. This means that the user can be denied specific capabilities that
* their role might have, but the user is specifically denied.
*
* @since 2.0.0
*
* @return bool[] Array of key/value pairs where keys represent a capability name
* and boolean values represent whether the user has that capability.
*/
public function get_role_caps() {
$switch_site = false;
if ( is_multisite() && get_current_blog_id() !== $this->site_id ) {
$switch_site = true;

switch_to_blog( $this->site_id );
}

$wp_roles = wp_roles();

// Filter out caps that are not role names and assign to $this->roles.
if ( is_array( $this->caps ) ) {
$this->roles = array_filter( array_keys( $this->caps ), array( $wp_roles, 'is_role' ) );
}

// Build $allcaps from role caps, overlay user's $caps.
$this->allcaps = array();
foreach ( (array) $this->roles as $role ) {
$the_role = $wp_roles->get_role( $role );
$this->allcaps = array_merge( (array) $this->allcaps, (array) $the_role->capabilities );
}
$this->allcaps = array_merge( (array) $this->allcaps, (array) $this->caps );

if ( $switch_site ) {
restore_current_blog();
}

return $this->allcaps;
}

/**
* Adds role to user.
*
* Updates the user's meta data option with capabilities and roles.
*
* @since 2.0.0
*
* @param string $role Role name.
*/
public function add_role( $role ) {
if ( empty( $role ) ) {
return;
}

if ( in_array( $role, $this->roles, true ) ) {
return;
}

$this->caps[ $role ] = true;
update_user_meta( $this->ID, $this->cap_key, $this->caps );
$this->get_role_caps();
$this->update_user_level_from_caps();

/**
* Fires immediately after the user has been given a new role.
*
* @since 4.3.0
*
* @param int $user_id The user ID.
* @param string $role The new role.
*/
do_action( 'add_user_role', $this->ID, $role );
}

/**
* Removes role from user.
*
* @since 2.0.0
*
* @param string $role Role name.
*/
public function remove_role( $role ) {
if ( ! in_array( $role, $this->roles, true ) ) {
return;
}

unset( $this->caps[ $role ] );
update_user_meta( $this->ID, $this->cap_key, $this->caps );
$this->get_role_caps();
$this->update_user_level_from_caps();

/**
* Fires immediately after a role as been removed from a user.
*
* @since 4.3.0
*
* @param int $user_id The user ID.
* @param string $role The removed role.
*/
do_action( 'remove_user_role', $this->ID, $role );
}

/**
* Sets the role of the user.
*
* This will remove the previous roles of the user and assign the user the
* new one. You can set the role to an empty string and it will remove all
* of the roles from the user.
*
* @since 2.0.0
*
* @param string $role Role name.
*/
public function set_role( $role ) {
if ( 1 === count( $this->roles ) && current( $this->roles ) === $role ) {
return;
}

foreach ( (array) $this->roles as $oldrole ) {
unset( $this->caps[ $oldrole ] );
}

$old_roles = $this->roles;

if ( ! empty( $role ) ) {
$this->caps[ $role ] = true;
$this->roles = array( $role => true );
} else {
$this->roles = array();
}

update_user_meta( $this->ID, $this->cap_key, $this->caps );
$this->get_role_caps();
$this->update_user_level_from_caps();

foreach ( $old_roles as $old_role ) {
if ( ! $old_role || $old_role === $role ) {
continue;
}

/** This action is documented in wp-includes/class-wp-user.php */
do_action( 'remove_user_role', $this->ID, $old_role );
}

if ( $role && ! in_array( $role, $old_roles, true ) ) {
/** This action is documented in wp-includes/class-wp-user.php */
do_action( 'add_user_role', $this->ID, $role );
}

/**
* Fires after the user's role has changed.
*
* @since 2.9.0
* @since 3.6.0 Added $old_roles to include an array of the user's previous roles.
*
* @param int $user_id The user ID.
* @param string $role The new role.
* @param string[] $old_roles An array of the user's previous roles.
*/
do_action( 'set_user_role', $this->ID, $role, $old_roles );
}

/**
* Chooses the maximum level the user has.
*
* Will compare the level from the $item parameter against the $max
* parameter. If the item is incorrect, then just the $max parameter value
* will be returned.
*
* Used to get the max level based on the capabilities the user has. This
* is also based on roles, so if the user is assigned the Administrator role
* then the capability 'level_10' will exist and the user will get that
* value.
*
* @since 2.0.0
*
* @param int $max Max level of user.
* @param string $item Level capability name.
* @return int Max Level.
*/
public function level_reduction( $max, $item ) {
if ( preg_match( '/^level_(10|[0-9])$/i', $item, $matches ) ) {
$level = (int) $matches[1];
return max( $max, $level );
} else {
return $max;
}
}

/**
* Updates the maximum user level for the user.
*
* Updates the 'user_level' user metadata (includes prefix that is the
* database table prefix) with the maximum user level. Gets the value from
* the all of the capabilities that the user has.
*
* @since 2.0.0
*
* @global wpdb $wpdb WordPress database abstraction object.
*/
public function update_user_level_from_caps() {
global $wpdb;
$this->user_level = array_reduce( array_keys( $this->allcaps ), array( $this, 'level_reduction' ), 0 );
update_user_meta( $this->ID, $wpdb->get_blog_prefix() . 'user_level', $this->user_level );
}

/**
* Adds capability and grant or deny access to capability.
*
* @since 2.0.0
*
* @param string $cap Capability name.
* @param bool $grant Whether to grant capability to user.
*/
public function add_cap( $cap, $grant = true ) {
$this->caps[ $cap ] = $grant;
update_user_meta( $this->ID, $this->cap_key, $this->caps );
$this->get_role_caps();
$this->update_user_level_from_caps();
}

/**
* Removes capability from user.
*
* @since 2.0.0
*
* @param string $cap Capability name.
*/
public function remove_cap( $cap ) {
if ( ! isset( $this->caps[ $cap ] ) ) {
return;
}
unset( $this->caps[ $cap ] );
update_user_meta( $this->ID, $this->cap_key, $this->caps );
$this->get_role_caps();
$this->update_user_level_from_caps();
}

/**
* Removes all of the capabilities of the user.
*
* @since 2.1.0
*
* @global wpdb $wpdb WordPress database abstraction object.
*/
public function remove_all_caps() {
global $wpdb;
$this->caps = array();
delete_user_meta( $this->ID, $this->cap_key );
delete_user_meta( $this->ID, $wpdb->get_blog_prefix() . 'user_level' );
$this->get_role_caps();
}

/**
* Returns whether the user has the specified capability.
*
* This function also accepts an ID of an object to check against if the capability is a meta capability. Meta
* capabilities such as `edit_post` and `edit_user` are capabilities used by the `map_meta_cap()` function to
* map to primitive capabilities that a user or role has, such as `edit_posts` and `edit_others_posts`.
*
* Example usage:
*
* $user->has_cap( 'edit_posts' );
* $user->has_cap( 'edit_post', $post->ID );
* $user->has_cap( 'edit_post_meta', $post->ID, $meta_key );
*
* While checking against a role in place of a capability is supported in part, this practice is discouraged as it
* may produce unreliable results.
*
* @since 2.0.0
* @since 5.3.0 Formalized the existing and already documented `...$args` parameter
* by adding it to the function signature.
*
* @see map_meta_cap()
*
* @param string $cap Capability name.
* @param mixed ...$args Optional further parameters, typically starting with an object ID.
* @return bool Whether the user has the given capability, or, if an object ID is passed, whether the user has
* the given capability for that object.
*/
public function has_cap( $cap, ...$args ) {
if ( is_numeric( $cap ) ) {
_deprecated_argument( __FUNCTION__, '2.0.0', __( 'Usage of user levels is deprecated. Use capabilities instead.' ) );
$cap = $this->translate_level_to_cap( $cap );
}

$caps = map_meta_cap( $cap, $this->ID, ...$args );

// Multisite super admin has all caps by definition, Unless specifically denied.
if ( is_multisite() && is_super_admin( $this->ID ) ) {
if ( in_array( 'do_not_allow', $caps, true ) ) {
return false;
}
return true;
}

// Maintain BC for the argument passed to the "user_has_cap" filter.
$args = array_merge( array( $cap, $this->ID ), $args );

/**
* Dynamically filter a user's capabilities.
*
* @since 2.0.0
* @since 3.7.0 Added the `$user` parameter.
*
* @param bool[] $allcaps Array of key/value pairs where keys represent a capability name
* and boolean values represent whether the user has that capability.
* @param string[] $caps Required primitive capabilities for the requested capability.
* @param array $args {
* Arguments that accompany the requested capability check.
*
* @type string $0 Requested capability.
* @type int $1 Concerned user ID.
* @type mixed ...$2 Optional second and further parameters, typically object ID.
* }
* @param WP_User $user The user object.
*/
$capabilities = apply_filters( 'user_has_cap', $this->allcaps, $caps, $args, $this );

// Everyone is allowed to exist.
$capabilities['exist'] = true;

// Nobody is allowed to do things they are not allowed to do.
unset( $capabilities['do_not_allow'] );

// Must have ALL requested caps.
foreach ( (array) $caps as $cap ) {
if ( empty( $capabilities[ $cap ] ) ) {
return false;
}
}

return true;
}

/**
* Converts numeric level to level capability name.
*
* Prepends 'level_' to level number.
*
* @since 2.0.0
*
* @param int $level Level number, 1 to 10.
* @return string
*/
public function translate_level_to_cap( $level ) {
return 'level_' . $level;
}

/**
* Sets the site to operate on. Defaults to the current site.
*
* @since 3.0.0
* @deprecated 4.9.0 Use WP_User::for_site()
*
* @param int $blog_id Optional. Site ID, defaults to current site.
*/
public function for_blog( $blog_id = '' ) {
_deprecated_function( __METHOD__, '4.9.0', 'WP_User::for_site()' );

$this->for_site( $blog_id );
}

/**
* Sets the site to operate on. Defaults to the current site.
*
* @since 4.9.0
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param int $site_id Site ID to initialize user capabilities for. Default is the current site.
*/
public function for_site( $site_id = '' ) {
global $wpdb;

if ( ! empty( $site_id ) ) {
$this->site_id = absint( $site_id );
} else {
$this->site_id = get_current_blog_id();
}

$this->cap_key = $wpdb->get_blog_prefix( $this->site_id ) . 'capabilities';

$this->caps = $this->get_caps_data();

$this->get_role_caps();
}

/**
* Gets the ID of the site for which the user's capabilities are currently initialized.
*
* @since 4.9.0
*
* @return int Site ID.
*/
public function get_site_id() {
return $this->site_id;
}

/**
* Gets the available user capabilities data.
*
* @since 4.9.0
*
* @return bool[] List of capabilities keyed by the capability name,
* e.g. `array( 'edit_posts' => true, 'delete_posts' => false )`.
*/
private function get_caps_data() {
$caps = get_user_meta( $this->ID, $this->cap_key, true );

if ( ! is_array( $caps ) ) {
return array();
}

return $caps;
}
}