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<?php
/**
* class-groups-user-group.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;
}
/**
* User Group OPM.
*/
class Groups_User_Group {
/**
* @var object persisted object
*
* @access private - do not access this property directly, the visibility will be made private in the future
*/
public $user_group = null;
/**
* Hook into appropriate actions.
*
* @see wp_delete_user()
* @see remove_user_from_blog()
*/
public static function init() {
// when a user is deleted, it must be removed from all groups it
// belongs to - triggered by wp_delete_user() and wpmu_delete_user()
add_action( 'deleted_user', array( __CLASS__, 'deleted_user' ) );
// when a user is removed from a blog, the user must be removed
// from all groups in that blog that it belongs to
add_action( 'remove_user_from_blog', array( __CLASS__, 'remove_user_from_blog' ), 10, 2 );
}
/**
* Create by user and group id.
* Must have been persisted.
*
* @param int $user_id
* @param int $group_id
*/
public function __construct( $user_id, $group_id ) {
$this->user_group = self::read( $user_id, $group_id );
}
/**
* Provide the user ID related to this object.
*
* @return int|null
*/
public function get_user_id() {
return $this->user_id;
}
/**
* Provide the group ID related to this object.
*
* @return int|null
*/
public function get_group_id() {
return $this->group_id;
}
/**
* Retrieve a property by name.
*
* Possible properties:
* - user_id
* - group_id
*
* @param string $name property's name
*
* @return mixed property value, will return null if property does not exist
*/
public function __get( $name ) {
$result = null;
if ( $this->user_group !== null ) {
switch( $name ) {
case 'user_id' :
case 'group_id' :
$result = $this->user_group->$name;
break;
}
}
return $result;
}
/**
* Persist a user-group relation.
*
* As of Groups 2.2.0, this is not invoked when entries for existing users are created on
* plugin activation, thus the 'groups_created_user_group' action is not called for these.
*
* @param array $map attributes - must provide user_id and group_id
*
* @return true on success, otherwise false
*/
public static function create( $map ) {
global $wpdb;
$result = false;
$group_id = isset( $map['group_id'] ) ? $map['group_id'] : null;
$user_id = isset( $map['user_id'] ) ? $map['user_id'] : null;
// avoid nonsense requests
if ( !empty( $group_id ) ) {
// make sure user and group exist
if (
( false !== Groups_Utility::id( $user_id ) ) &&
( $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(ID) FROM $wpdb->users WHERE ID = %d", $user_id ) ) > 0 ) &&
( $group = Groups_Group::read( $group_id ) )
) {
// only allow to add users to groups if they belong to the
// group's blog or we have the anonymous user
if ( is_user_member_of_blog( Groups_Utility::id( $user_id ) ) || ( Groups_Utility::id( $user_id ) === 0 ) ) {
$user_group_table = _groups_get_tablename( 'user_group' );
// don't try to create duplicate entries
// also it would raise an error for duplicate PK
if ( 0 === intval( $wpdb->get_var( $wpdb->prepare(
"SELECT COUNT(*) FROM $user_group_table WHERE user_id = %d AND group_id = %d", // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
Groups_Utility::id( $user_id ),
Groups_Utility::id( $group_id ) ) ) )
) {
$data = array(
'user_id' => Groups_Utility::id( $user_id ),
'group_id' => Groups_Utility::id( $group_id )
);
$formats = array( '%d', '%d' );
if ( $wpdb->insert( $user_group_table, $data, $formats ) ) {
$result = true;
do_action( 'groups_created_user_group', $user_id, $group_id );
}
}
}
}
}
return $result;
}
/**
* Retrieve a user-group relation.
*
* @param int $user_id user's id
* @param int $group_id group's id
*
* @return object upon success, otherwise false
*/
public static function read( $user_id, $group_id ) {
global $wpdb;
$result = false;
$user_group_table = _groups_get_tablename( 'user_group' );
$user_group = $wpdb->get_row( $wpdb->prepare(
"SELECT * FROM $user_group_table WHERE user_id = %d AND group_id = %d", // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
Groups_Utility::id( $user_id ),
Groups_Utility::id( $group_id )
) );
if ( $user_group !== null ) {
$result = $user_group;
}
return $result;
}
/**
* Update user-group relation.
*
* As the relation has no properties that could be updated, this method does nothing and will return false.
*
* @param array $map
*
* @return true on success, otherwise false
*/
public static function update( $map ) {
$result = false;
// @since 2.20.0 do not process
if ( false ) {
$group_id = isset( $map['group_id'] ) ? $map['group_id'] : null;
$user_id = isset( $map['user_id'] ) ? $map['user_id'] : null;
if ( $group_id !== null && $user_id !== null ) {
// make sure user and group exist
if ( ( false !== Groups_Utility::id( $user_id ) ) && get_user_by( 'id', $user_id ) && Groups_Group::read( $group_id ) ) {
$result = true;
do_action( 'groups_updated_user_group', $user_id, $group_id );
}
}
}
return $result;
}
/**
* Remove user-group relation.
*
* @param int $user_id
* @param int $group_id
*
* @return true if successful, false otherwise
*/
public static function delete( $user_id, $group_id ) {
global $wpdb;
$result = false;
// avoid nonsense requests
if ( !empty( $group_id ) ) {
// to allow deletion of an entry after a user has been deleted,
// we don't check if the user exists
$user_group_table = _groups_get_tablename( 'user_group' );
// get rid of it
$rows = $wpdb->query( $wpdb->prepare(
"DELETE FROM $user_group_table WHERE user_id = %d AND group_id = %d", // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
Groups_Utility::id( $user_id ),
Groups_Utility::id( $group_id )
) );
// must have affected a row, otherwise no great success
$result = ( $rows !== false ) && ( $rows > 0 );
if ( $result ) {
do_action( 'groups_deleted_user_group', $user_id, $group_id );
}
}
return $result;
}
/**
* Hooks into the deleted_user action to remove the deleted user from
* all groups it belongs to.
*
* @param int $user_id
*/
public static function deleted_user( $user_id ) {
global $wpdb;
$user_group_table = _groups_get_tablename( 'user_group' );
$rows = $wpdb->get_results( $wpdb->prepare(
"SELECT * FROM $user_group_table WHERE user_id = %d", // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
Groups_Utility::id( $user_id )
) );
if ( $rows ) {
foreach( $rows as $row ) {
// don't optimize that in preference of a standard deletion
// process (trigger actions ...)
self::delete( $row->user_id, $row->group_id );
}
}
}
/**
* Hooks into the remove_user_from_blog action to remove the user
* from groups that belong to that blog.
*
* Note that this is preemptive as there is no
* removed_user_from_blog action.
*
* @param int $user_id
* @param int $blog_id
*/
public static function remove_user_from_blog( $user_id, $blog_id ) {
if ( is_multisite() ) {
Groups_Controller::switch_to_blog( $blog_id );
}
global $wpdb;
$group_table = _groups_get_tablename( 'group' );
$user_group_table = _groups_get_tablename( 'user_group' );
// We can end up here while a blog is being deleted, in that case,
// the tables have already been deleted.
if ( ( $wpdb->get_var( "SHOW TABLES LIKE '" . $group_table . "'" ) == $group_table ) && // phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared
( $wpdb->get_var( "SHOW TABLES LIKE '" . $user_group_table . "'" ) == $user_group_table ) // phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared
) {
$rows = $wpdb->get_results( $wpdb->prepare(
"SELECT * FROM $user_group_table LEFT JOIN $group_table ON $user_group_table.group_id = $group_table.group_id WHERE $user_group_table.user_id = %d", // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
Groups_Utility::id( $user_id )
) );
if ( $rows ) {
foreach( $rows as $row ) {
// don't optimize that, favour standard deletion
self::delete( $row->user_id, $row->group_id );
}
}
}
if ( is_multisite() ) {
Groups_Controller::restore_current_blog();
}
}
}
Groups_User_Group::init();