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<?php
/**
* class-groups-user.php
*
* Copyright (c) "kento" Karim Rahimpur www.itthinx.com
*
* This code is released under the GNU General Public License.
* See COPYRIGHT.txt and LICENSE.txt.
*
* This code is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* This header and all notices must be kept intact.
*
* @author Karim Rahimpur
* @package groups
* @since groups 1.0.0
*/
if ( !defined( 'ABSPATH' ) ) {
exit;
}
require_once GROUPS_CORE_LIB . '/interface-i-capable.php';
require_once GROUPS_CORE_LIB . '/class-groups-capability.php';
/**
* User OPM.
*/
class Groups_User implements I_Capable {
/**
* @var string cache group key
*/
const CACHE_GROUP = 'groups';
/**
* @var string cache key prefix
*/
const CAPABILITIES = 'capabilities';
/**
* @var string cache key prefix
*/
const CAPABILITIES_BASE = 'capabilities_base';
/**
* @var string cache key prefix
*/
const CAPABILITY_IDS = 'capability_ids';
/**
* @var string cache key prefix
*/
const CAPABILITY_IDS_BASE = 'capability_ids_base';
/**
* @var string cache key prefix
*/
const GROUP_IDS = 'group_ids';
/**
* @var string cache key prefix
*/
const GROUP_IDS_BASE = 'group_ids_base';
/**
* @var string cache key prefix
*/
const GROUPS = 'groups';
/**
* @var string cache key prefix
*/
const GROUPS_BASE = 'groups_base';
/**
* User object.
*
* @access private - Use $this->get_user() instead as this property will be made private in a future release of Groups
*
* @var WP_User
*/
public $user = null;
/**
* Hook cache clearers to actions that can modify the capabilities.
*/
public static function init() {
add_action( 'groups_created_user_group', array( __CLASS__, 'clear_cache' ) );
add_action( 'groups_updated_user_group', array( __CLASS__, 'clear_cache' ) );
add_action( 'groups_deleted_user_group', array( __CLASS__, 'clear_cache' ) );
add_action( 'groups_created_user_capability', array( __CLASS__, 'clear_cache' ) );
add_action( 'groups_updated_user_capability', array( __CLASS__, 'clear_cache' ) );
add_action( 'groups_deleted_user_capability', array( __CLASS__, 'clear_cache' ) );
add_action( 'groups_created_group_capability', array( __CLASS__, 'clear_cache_for_group' ) );
add_action( 'groups_updated_group_capability', array( __CLASS__, 'clear_cache_for_group' ) );
add_action( 'groups_deleted_group_capability', array( __CLASS__, 'clear_cache_for_group' ) );
}
/**
* Clear cache objects for the user.
*
* @param int $user_id
*/
public static function clear_cache( $user_id ) {
// be lazy, clear the entries so they are rebuilt when requested
Groups_Cache::delete( self::CAPABILITIES . $user_id, self::CACHE_GROUP );
Groups_Cache::delete( self::CAPABILITIES_BASE . $user_id, self::CACHE_GROUP );
Groups_Cache::delete( self::CAPABILITY_IDS . $user_id, self::CACHE_GROUP );
Groups_Cache::delete( self::CAPABILITY_IDS_BASE . $user_id, self::CACHE_GROUP );
Groups_Cache::delete( self::GROUP_IDS . $user_id, self::CACHE_GROUP );
Groups_Cache::delete( self::GROUP_IDS_BASE . $user_id, self::CACHE_GROUP );
Groups_Cache::delete( self::GROUPS . $user_id, self::CACHE_GROUP );
Groups_Cache::delete( self::GROUPS_BASE . $user_id, self::CACHE_GROUP );
}
/**
* Clear cache objects for all users in the group.
*
* @param int $group_id
*/
public static function clear_cache_for_group( $group_id ) {
global $wpdb;
if ( $group = Groups_Group::read( $group_id ) ) {
// not using $group->users, as we don't need a lot of user objects created here
$user_group_table = _groups_get_tablename( 'user_group' );
$users = $wpdb->get_results( $wpdb->prepare(
"SELECT ID FROM $wpdb->users LEFT JOIN $user_group_table ON $wpdb->users.ID = $user_group_table.user_id WHERE $user_group_table.group_id = %d", // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
Groups_Utility::id( $group_id )
) );
if ( $users ) {
foreach( $users as $user ) {
self::clear_cache( $user->ID );
}
}
}
}
/**
* Convenience method equivalent to $this->is_member( $group_id ) without having to instantiate a Groups_User object outside first.
*
* @since 2.20.0
*
* @param int|\WP_User $user user ID or user object
* @param int $group_id group ID
*
* @return boolean
*/
public static function user_is_member( $user, $group_id ) {
$is_member = false;
$user_id = null;
if ( is_numeric( $user ) ) {
$user_id = max( 0, intval( $user ) );
} else if ( $user instanceof \WP_User ) {
$user_id = $user->ID;
}
if ( $user_id !== null ) {
$groups_user = new Groups_User( $user_id );
$is_member = $groups_user->is_member( $group_id );
}
return $is_member;
}
/**
* Whether the current user has the capability.
*
* @since 3.0.0
*
* @param string $capability capability name
* @param mixed ...$args optional parameters, typically an object ID
*
* @return boolean
*/
public static function current_user_can( $capability, ...$args ) {
//
// The global $current_user is determined in the privately scoped function _wp_get_current_user() defined in wp-includes/user.php.
// The only call to that function is made in wp_get_current_user(), defined in wp-includes/pluggable.php.
//
// A call to current_user_can() defined in wp-includes/capabilities.php which is using wp_get_current_user()
// which is defined in wp-includes/pluggable.php. The latter is simply wrapping a call to _wp_get_current_user().
// The wp-includes/pluggable.php is loaded after all plugins have been loaded in a loop in wp-settings.php, whereas
// wp-includes/user.php is loaded before. So if a plugin makes use of current_user_can() during the loop in wp-settings.php
// which loads all plugins, the function wp_get_current_user() is not yet defined and a call to current_user_can() ends
// up creating an error. The function wp_get_current_user() can be defined by a plugin in which case the native
// WordPress version is not used. Thus we should not simply load wp-includes/pluggable.php in the "plugin-loading-loop"
// as that would void the ability of overriding the wp_get_current_user() function via a plugin as the standard is loaded
// before that loop ends loading all plugins.
//
// So if wp_get_current_user() is not yet defined, the global $current_user is not yet determined.
// Because of that, a call to current_user_can() should assume the logged out or anonymous user.
// This is the correct way to handle the situation when wp_get_current_user() is not defined yet,
// and we SHOULD NOT load wp-includes/pluggable.php.
//
$user = 0;
if ( function_exists( 'wp_get_current_user' ) ) {
$user = wp_get_current_user();
}
return self::user_can( $user, $capability, ...$args );
}
/**
* Whether the given user has the capability.
*
* @since 3.0.0
*
* @param int|WP_User $user user ID or object
* @param string $capability capability name
* @param mixed ...$args optional parameters, typically an object ID
*
* @return boolean
*/
public static function user_can( $user, $capability, ...$args ) {
// If $user is not an object, user_can() will call get_userdata() which is defined in wp-includes/pluggable.php.
if ( function_exists( 'user_can' ) && function_exists( 'get_userdata' ) ) {
return user_can( $user, $capability, ...$args );
}
// So we will have just the same problem as with current_user_can() unless we avoid getting functions involved which are not yet defined.
// user_can() calls $user->has_cap() to produce the result, same here:
if ( !( $user instanceof WP_User ) ) {
$user = intval( $user );
$user = new WP_User( $user );
if ( $user === 0 ) {
$user->init( new stdClass() );
}
}
if ( $user instanceof WP_User ) {
return $user->has_cap( $capability, ...$args );
}
return false;
}
/**
* Create, if $user_id = 0 an anonymous user is assumed.
*
* @param int $user_id
*/
public function __construct( $user_id = null ) {
if ( $user_id !== null ) {
if ( Groups_Utility::id( $user_id ) ) {
$this->user = get_user_by( 'id', $user_id );
if ( !$this->user ) {
$this->user = new WP_User( 0 );
}
} else {
$this->user = new WP_User( 0 );
}
}
}
/**
* Provide the related WP_User object.
*
* @return WP_User
*/
public function get_user() {
return $this->user;
}
/**
* Set the related WP_User object.
*
* @param WP_User $user the user object
*/
public function set_user( $user ) {
if ( $user instanceof WP_User ) {
$this->user = $user;
}
}
/**
* Provide the ID of the related WP_User object.
*
* @return int|null
*/
public function get_user_id() {
$user_id = null;
if ( $this->user !== null && $this->user instanceof WP_User ) {
$user_id = $this->user->ID;
}
return $user_id;
}
/**
* Provides the capabilities of the object.
*
* @return Groups_Capability[]
*/
public function get_capabilities() {
return $this->capabilities;
}
/**
* Provides the IDs of the capabilities of this object.
*
* @return int[]
*/
public function get_capability_ids() {
return $this->capability_ids;
}
/**
* Provides the capabilities of the object, those of the user's roles and those of the object's groups, including from ancestor groups.
*
* @return Groups_Capability[]
*/
public function get_capabilities_deep() {
return $this->capabilities_deep;
}
/**
* Provides the IDs of the capabilities of object, those of the user's roles and those of the object's groups, including from ancestor groups.
*
* @return int[]
*/
public function get_capability_ids_deep() {
return $this->capability_ids_deep;
}
/**
* Provides the groups this object relates to.
*
* @return Groups_Group[]
*/
public function get_groups() {
return $this->groups;
}
/**
* Provides the groups that this object relates to and includes their ancestors.
*
* @return Groups_Group[]
*/
public function get_groups_deep() {
return $this->groups_deep;
}
/**
* Provides the IDs of the groups that this object relates to.
*
* @return int[]
*/
public function get_group_ids() {
return $this->group_ids;
}
/**
* Provide the IDs of the groups that this object relates to and from ancestor groups.
*/
public function get_group_ids_deep() {
return $this->group_ids_deep;
}
/**
* Retrieve a user property.
*
* Must be "capabilities", "groups" or a property of the WP_User class.
*
* @param string $name property's name
*/
public function __get( $name ) {
global $wpdb;
$result = null;
if ( $this->user !== null ) {
switch ( $name ) {
case 'capability_ids' :
$cached = Groups_Cache::get( self::CAPABILITY_IDS_BASE . $this->user->ID, self::CACHE_GROUP );
if ( $cached !== null ) {
$result = $cached->value;
unset( $cached );
} else {
$user_capability_table = _groups_get_tablename( 'user_capability' );
$rows = $wpdb->get_results( $wpdb->prepare(
"SELECT capability_id FROM $user_capability_table WHERE user_id = %d", // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
Groups_Utility::id( $this->user->ID )
) );
if ( $rows ) {
$result = array();
foreach ( $rows as $row ) {
$result[] = $row->capability_id;
}
}
Groups_Cache::set( self::CAPABILITY_IDS_BASE . $this->user->ID, $result, self::CACHE_GROUP );
}
break;
case 'capability_ids_deep' :
if ( $this->user !== null ) {
$cached = Groups_Cache::get( self::CAPABILITY_IDS . $this->user->ID, self::CACHE_GROUP );
if ( $cached !== null ) {
$capability_ids = $cached->value;
unset( $cached );
} else {
$this->init_cache( $capability_ids );
}
$result = $capability_ids;
}
break;
case 'group_ids' :
$cached = Groups_Cache::get( self::GROUP_IDS_BASE . $this->user->ID, self::CACHE_GROUP );
if ( $cached !== null ) {
$result = $cached->value;
unset( $cached );
} else {
$user_group_table = _groups_get_tablename( 'user_group' );
$rows = $wpdb->get_results( $wpdb->prepare(
"SELECT group_id FROM $user_group_table WHERE user_id = %d", // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
Groups_Utility::id( $this->user->ID )
) );
if ( $rows ) {
$result = array();
foreach( $rows as $row ) {
$result[] = $row->group_id;
}
}
Groups_Cache::set( self::GROUP_IDS_BASE . $this->user->ID, $result, self::CACHE_GROUP );
}
break;
case 'group_ids_deep' :
if ( $this->user !== null ) {
$cached = Groups_Cache::get( self::GROUP_IDS . $this->user->ID, self::CACHE_GROUP );
if ( $cached !== null ) {
$group_ids = $cached->value;
unset( $cached );
} else {
$this->init_cache( $capability_ids, $capabilities, $group_ids );
}
$result = $group_ids;
}
break;
case 'capabilities' :
$cached = Groups_Cache::get( self::CAPABILITIES_BASE . $this->user->ID, self::CACHE_GROUP );
if ( $cached !== null ) {
$result = $cached->value;
unset( $cached );
} else {
$user_capability_table = _groups_get_tablename( 'user_capability' );
$rows = $wpdb->get_results( $wpdb->prepare(
"SELECT capability_id FROM $user_capability_table WHERE user_id = %d", // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
Groups_Utility::id( $this->user->ID )
) );
if ( $rows ) {
$result = array();
foreach ( $rows as $row ) {
$result[] = new Groups_Capability( $row->capability_id );
}
}
Groups_Cache::set( self::CAPABILITIES_BASE . $this->user->ID, $result, self::CACHE_GROUP );
}
break;
case 'capabilities_deep' :
if ( $this->user !== null ) {
$cached = Groups_Cache::get( self::CAPABILITIES . $this->user->ID, self::CACHE_GROUP );
if ( $cached !== null ) {
$capabilities = $cached->value;
unset( $cached );
} else {
$this->init_cache( $capability_ids, $capabilities );
}
$result = $capabilities;
}
break;
case 'groups' :
$cached = Groups_Cache::get( self::GROUPS_BASE . $this->user->ID, self::CACHE_GROUP );
if ( $cached !== null ) {
$result = $cached->value;
unset( $cached );
} else {
$user_group_table = _groups_get_tablename( 'user_group' );
$rows = $wpdb->get_results( $wpdb->prepare(
"SELECT group_id FROM $user_group_table WHERE user_id = %d", // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
Groups_Utility::id( $this->user->ID )
) );
if ( $rows ) {
$result = array();
foreach( $rows as $row ) {
$result[] = new Groups_Group( $row->group_id );
}
}
Groups_Cache::set( self::GROUPS_BASE . $this->user->ID, $result, self::CACHE_GROUP );
}
break;
case 'groups_deep' :
$cached = Groups_Cache::get( self::GROUPS . $this->user->ID, self::CACHE_GROUP );
if ( $cached !== null ) {
$result = $cached->value;
unset( $cached );
} else {
$result = array();
foreach( $this->group_ids_deep as $group_id ) {
$result[] = new Groups_Group( $group_id );
}
Groups_Cache::set( self::GROUPS . $this->user->ID, $result, self::CACHE_GROUP );
}
break;
default:
$result = $this->user->$name;
}
}
return $result;
}
/**
* @see I_Capable::can()
*/
public function can( $capability, $object = null, $args = null ) {
$result = false;
if ( $this->user !== null ) {
if ( _groups_admin_override( $this->user->ID ) ) {
$result = true;
} else {
// determine capability id
$capability_id = null;
if ( is_numeric( $capability ) ) {
$capability_id = Groups_Utility::id( $capability );
$cached = Groups_Cache::get( self::CAPABILITY_IDS . $this->user->ID, self::CACHE_GROUP );
if ( $cached !== null ) {
$capability_ids = $cached->value;
unset( $cached );
} else {
$this->init_cache( $capability_ids );
}
$result = in_array( $capability_id, $capability_ids );
} else if ( is_string( $capability ) ) {
$cached = Groups_Cache::get( self::CAPABILITIES . $this->user->ID, self::CACHE_GROUP );
if ( $cached !== null ) {
$capabilities = $cached->value;
unset( $cached );
} else {
$this->init_cache( $capability_ids, $capabilities );
}
$result = in_array( $capability, $capabilities );
}
}
}
/**
* Filter whether the user has the capability.
*
* @since 3.0.0 $object
* @since 3.0.0 $args
*
* @param boolean $result
* @param Groups_User $group_user
* @param string $capability
* @param mixed $object
* @param mixed $args
*
* @return boolean
*/
$result = apply_filters_ref_array( 'groups_user_can', array( $result, &$this, $capability, $object, $args ) );
return $result;
}
/**
* Returns true if the user belongs to the group.
*
* @param int $group_id
*
* @return boolean
*/
public function is_member( $group_id ) {
$result = false;
if ( $this->user !== null ) {
if ( isset( $this->user->ID ) ) {
$user_group = Groups_User_Group::read(
Groups_Utility::id( $this->user->ID ),
Groups_Utility::id( $group_id )
);
$result = $user_group !== false;
unset( $user_group );
}
}
/**
* Allow to modify the result of whether the user belongs to a given group.
*
* @since 2.20.0
*
* @param $result boolean whether the user belongs to the group
* @param $this \Groups_User the Groups user object
* @param int $group_id the group ID
*
* @return boolean $filtered_result
*/
$filtered_result = apply_filters( 'groups_user_is_member', $result, $this, $group_id );
if ( is_bool( $result ) ) {
$result = $filtered_result;
}
return $result;
}
/**
* Builds the cache entries for user groups and capabilities if needed.
* The cache entries are built only if they do not already exist.
* If you want them rebuilt, delete them before calling.
*
* @param array $capability_ids carries the capability ids for the user on return, but only if cache entries have been built; will provide an empty array by default
* @param array $capabilities carries the capabilities for the user on return, but only if cache entries have been built; will provide an empty array by default
* @param array $group_ids carries the group ids for the user on return, but only if cache entries have been built; will provide an empty array by default
*/
private function init_cache( &$capability_ids = null, &$capabilities = null, &$group_ids = null ) {
global $wpdb;
$capabilities = array();
$capability_ids = array();
$group_ids = array();
if ( ( $this->user !== null ) && ( Groups_Cache::get( self::GROUP_IDS . $this->user->ID, self::CACHE_GROUP ) === null ) ) {
$group_table = _groups_get_tablename( 'group' );
$capability_table = _groups_get_tablename( 'capability' );
$group_capability_table = _groups_get_tablename( 'group_capability' );
$user_group_table = _groups_get_tablename( 'user_group' );
$user_capability_table = _groups_get_tablename( 'user_capability' );
$limit = $wpdb->get_var( "SELECT COUNT(*) FROM $group_table" ); // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
if ( $limit === null ) {
$limit = 1;
}
// note that limits by blog_id for multisite are
// enforced when a user is added to a blog
$user_groups = $wpdb->get_results( $wpdb->prepare(
"SELECT group_id FROM $user_group_table WHERE user_id = %d", // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
Groups_Utility::id( $this->user->ID )
) );
// get all capabilities directly assigned (those granted through
// groups are added below
$user_capabilities = $wpdb->get_results( $wpdb->prepare(
"SELECT c.capability_id, c.capability FROM $user_capability_table uc LEFT JOIN $capability_table c ON c.capability_id = uc.capability_id WHERE user_id = %d", // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
Groups_Utility::id( $this->user->ID )
) );
if ( $user_capabilities ) {
foreach( $user_capabilities as $user_capability ) {
$capabilities[] = $user_capability->capability;
$capability_ids[] = $user_capability->capability_id;
}
}
if ( apply_filters( 'groups_user_add_role_capabilities', true ) ) {
// Get all capabilities from the WP_User object.
$role_caps = $this->user->get_role_caps();
if ( !empty( $role_caps ) && is_array( $role_caps ) ) {
$caps = array();
foreach( $role_caps as $role_cap => $has ) {
if ( $has && !in_array( $role_cap, $capabilities ) ) {
$caps[] = $role_cap;
}
}
if ( !empty( $caps ) ) {
// Retrieve the capabilities and only add those that are
// recognized. Note that this also effectively filters out
// all roles and that this is desired.
if ( $role_capabilities = $wpdb->get_results( "SELECT capability_id, capability FROM $capability_table c WHERE capability IN ('" . implode( "','", esc_sql( $caps ) ) . "')" ) ) { // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
foreach( $role_capabilities as $role_capability ) {
$capabilities[] = $role_capability->capability;
$capability_ids[] = $role_capability->capability_id;
}
}
}
}
}
// Get all groups the user belongs to directly or through
// inheritance along with their capabilities.
if ( $user_groups ) {
foreach( $user_groups as $user_group ) {
$group_ids[] = Groups_Utility::id( $user_group->group_id );
}
if ( count( $group_ids ) > 0 ) {
$iterations = 0;
$old_group_ids_count = 0;
while( ( $iterations < $limit ) && ( count( $group_ids ) !== $old_group_ids_count ) ) {
$iterations++;
$old_group_ids_count = count( $group_ids );
$id_list = implode( ',', $group_ids );
$parent_group_ids = $wpdb->get_results(
"SELECT parent_id FROM $group_table WHERE parent_id IS NOT NULL AND group_id IN ($id_list)" // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
);
if ( $parent_group_ids ) {
foreach( $parent_group_ids as $parent_group_id ) {
$parent_group_id = Groups_Utility::id( $parent_group_id->parent_id );
if ( !in_array( $parent_group_id, $group_ids ) ) {
$group_ids[] = $parent_group_id;
}
}
}
}
$id_list = implode( ',', $group_ids );
$rows = $wpdb->get_results(
"SELECT $group_capability_table.capability_id, $capability_table.capability FROM $group_capability_table LEFT JOIN $capability_table ON $group_capability_table.capability_id = $capability_table.capability_id WHERE group_id IN ($id_list)" // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
);
if ( count( $rows ) > 0 ) {
foreach ( $rows as $row ) {
if ( !in_array( $row->capability_id, $capability_ids ) ) {
$capabilities[] = $row->capability;
$capability_ids[] = $row->capability_id;
}
}
}
}
}
Groups_Cache::set( self::CAPABILITIES . $this->user->ID, $capabilities, self::CACHE_GROUP );
Groups_Cache::set( self::CAPABILITY_IDS . $this->user->ID, $capability_ids, self::CACHE_GROUP );
Groups_Cache::set( self::GROUP_IDS . $this->user->ID, $group_ids, self::CACHE_GROUP );
}
}
}
Groups_User::init();