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employee-switching.php
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employee-switching.php
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<?php
/**
* User Switching plugin for WordPress
*
* @package employee-switching
* @link https://github.com/wp-erp/employee-switching
* @author weDevs
* @license GPL v2 or later
*
* Plugin Name: Employee Switching
* Description: Instant switching between user accounts in WordPress
* Version: 1.0
* Plugin URI: https://github.com/wp-erp/employee-switching.git
* Author: weDevs
* Author URI: https://github.com/wp-erp/employee-switching/graphs/contributors
* Text Domain: employee-switching
* Domain Path: /languages/
* Network: true
* Requires PHP: 5.3
*/
/**
* Main container class for the Employee Switching plugin.
*/
class employee_switching {
/**
* The name used to identify the application during a WordPress redirect.
*
* @var string
*/
public static $application = 'WordPress/User Switching';
/**
* Sets up all the filters and actions.
*/
public function init_hooks() {
// Required functionality:
add_filter( 'user_has_cap', array( $this, 'filter_user_has_cap' ), 10, 4 );
add_filter( 'map_meta_cap', array( $this, 'filter_map_meta_cap' ), 10, 4 );
add_filter( 'user_row_actions', array( $this, 'filter_user_row_actions' ), 10, 2 );
add_action( 'plugins_loaded', array( $this, 'action_plugins_loaded' ) );
add_action( 'init', array( $this, 'action_init' ) );
add_action( 'all_admin_notices', array( $this, 'action_admin_notices' ), 1 );
add_action( 'wp_logout', 'user_switching_clear_olduser_cookie' );
add_action( 'wp_login', 'user_switching_clear_olduser_cookie' );
// Nice-to-haves:
add_filter( 'ms_user_row_actions', array( $this, 'filter_user_row_actions' ), 10, 2 );
add_filter( 'login_message', array( $this, 'filter_login_message' ), 1 );
add_filter( 'removable_query_args', array( $this, 'filter_removable_query_args' ) );
add_action( 'wp_meta', array( $this, 'action_wp_meta' ) );
add_action( 'wp_footer', array( $this, 'action_wp_footer' ) );
add_action( 'personal_options', array( $this, 'action_personal_options' ) );
add_action( 'admin_bar_menu', array( $this, 'action_admin_bar_menu' ), 11 );
add_action( 'bp_member_header_actions', array( $this, 'action_bp_button' ), 11 );
add_action( 'bp_directory_members_actions', array( $this, 'action_bp_button' ), 11 );
add_action( 'bbp_template_after_user_details', array( $this, 'action_bbpress_button' ) );
add_filter( 'erp_employee_row_actions', array( $this, 'employee_row_action' ), 10, 2 );
}
/**
* Employee Stwitching
*
* @param array $actions row actions
* @param integer $user_id user id
* @return array
*/
public function employee_row_action( $actions, $user_id ) {
if ( ! current_user_can( 'erp_edit_employee' ) ) {
return;
}
$user = get_userdata( $user_id );
$link = self::maybe_switch_url( $user );
$actions['emmployee_switch'] = '<a href="'.$link.'">'.__( 'Switch To', 'user-switching' ).'</a>';
return $actions;
}
/**
* Defines the names of the cookies used by User Switching.
*/
public function action_plugins_loaded() {
// User Switching's auth_cookie
if ( ! defined( 'USER_SWITCHING_COOKIE' ) ) {
define( 'USER_SWITCHING_COOKIE', 'wordpress_user_sw_' . COOKIEHASH );
}
// User Switching's secure_auth_cookie
if ( ! defined( 'USER_SWITCHING_SECURE_COOKIE' ) ) {
define( 'USER_SWITCHING_SECURE_COOKIE', 'wordpress_user_sw_secure_' . COOKIEHASH );
}
// User Switching's logged_in_cookie
if ( ! defined( 'USER_SWITCHING_OLDUSER_COOKIE' ) ) {
define( 'USER_SWITCHING_OLDUSER_COOKIE', 'wordpress_user_sw_olduser_' . COOKIEHASH );
}
}
/**
* Outputs the 'Switch To' link on the user editing screen if the current user has permission to switch to them.
*
* @param WP_User $user User object for this screen.
*/
public function action_personal_options( WP_User $user ) {
$link = self::maybe_switch_url( $user );
if ( ! $link ) {
return;
}
?>
<tr>
<th scope="row"><?php echo esc_html_x( 'User Switching', 'User Switching title on user profile screen', 'user-switching' ); ?></th>
<td><a href="<?php echo esc_url( $link ); ?>"><?php esc_html_e( 'Switch To', 'user-switching' ); ?></a></td>
</tr>
<?php
}
/**
* Returns whether or not the current logged in user is being remembered in the form of a persistent browser cookie
* (ie. they checked the 'Remember Me' check box when they logged in). This is used to persist the 'remember me'
* value when the user switches to another user.
*
* @return bool Whether the current user is being 'remembered' or not.
*/
public static function remember() {
/** This filter is documented in wp-includes/pluggable.php */
$cookie_life = apply_filters( 'auth_cookie_expiration', 172800, get_current_user_id(), false );
$current = wp_parse_auth_cookie( '', 'logged_in' );
// Here we calculate the expiration length of the current auth cookie and compare it to the default expiration.
// If it's greater than this, then we know the user checked 'Remember Me' when they logged in.
return ( ( $current['expiration'] - time() ) > $cookie_life );
}
/**
* Loads localisation files and routes actions depending on the 'action' query var.
*/
public function action_init() {
load_plugin_textdomain( 'user-switching', false, dirname( plugin_basename( __FILE__ ) ) . '/languages' );
if ( ! isset( $_REQUEST['action'] ) ) {
return;
}
$current_user = ( is_user_logged_in() ) ? wp_get_current_user() : null;
switch ( $_REQUEST['action'] ) {
// We're attempting to switch to another user:
case 'switch_to_user':
if ( isset( $_REQUEST['user_id'] ) ) {
$user_id = absint( $_REQUEST['user_id'] );
} else {
$user_id = 0;
}
// Check authentication:
if ( ! current_user_can( 'switch_to_user', $user_id ) ) {
wp_die( esc_html__( 'Could not switch users.', 'user-switching' ) );
}
// Check intent:
check_admin_referer( "switch_to_user_{$user_id}" );
// Switch user:
$user = switch_to_user( $user_id, self::remember() );
if ( $user ) {
$redirect_to = self::get_redirect( $user, $current_user );
// Redirect to the dashboard or the home URL depending on capabilities:
$args = array(
'user_switched' => 'true',
);
if ( $redirect_to ) {
wp_safe_redirect( add_query_arg( $args, $redirect_to ), 302, self::$application );
} elseif ( ! current_user_can( 'read' ) ) {
wp_safe_redirect( add_query_arg( $args, home_url() ), 302, self::$application );
} else {
wp_safe_redirect( add_query_arg( $args, admin_url() ), 302, self::$application );
}
exit;
} else {
wp_die( esc_html__( 'Could not switch users.', 'user-switching' ) );
}
break;
// We're attempting to switch back to the originating user:
case 'switch_to_olduser':
// Fetch the originating user data:
$old_user = self::get_old_user();
if ( ! $old_user ) {
wp_die( esc_html__( 'Could not switch users.', 'user-switching' ) );
}
// Check authentication:
if ( ! self::authenticate_old_user( $old_user ) ) {
wp_die( esc_html__( 'Could not switch users.', 'user-switching' ) );
}
// Check intent:
check_admin_referer( "switch_to_olduser_{$old_user->ID}" );
// Switch user:
if ( switch_to_user( $old_user->ID, self::remember(), false ) ) {
if ( ! empty( $_REQUEST['interim-login'] ) ) {
$GLOBALS['interim_login'] = 'success'; // @codingStandardsIgnoreLine
login_header( '', '' );
exit;
}
$redirect_to = self::get_redirect( $old_user, $current_user );
$args = array(
'user_switched' => 'true',
'switched_back' => 'true',
);
if ( $redirect_to ) {
wp_safe_redirect( add_query_arg( $args, $redirect_to ), 302, self::$application );
} else {
wp_safe_redirect( add_query_arg( $args, admin_url( 'users.php' ) ), 302, self::$application );
}
exit;
} else {
wp_die( esc_html__( 'Could not switch users.', 'user-switching' ) );
}
break;
// We're attempting to switch off the current user:
case 'switch_off':
// Check authentication:
if ( ! current_user_can( 'switch_off' ) ) {
/* Translators: "switch off" means to temporarily log out */
wp_die( esc_html__( 'Could not switch off.', 'user-switching' ) );
}
// Check intent:
check_admin_referer( "switch_off_{$current_user->ID}" );
// Switch off:
if ( switch_off_user() ) {
$redirect_to = self::get_redirect( null, $current_user );
$args = array(
'switched_off' => 'true',
);
if ( $redirect_to ) {
wp_safe_redirect( add_query_arg( $args, $redirect_to ), 302, self::$application );
} else {
wp_safe_redirect( add_query_arg( $args, home_url() ), 302, self::$application );
}
exit;
} else {
/* Translators: "switch off" means to temporarily log out */
wp_die( esc_html__( 'Could not switch off.', 'user-switching' ) );
}
break;
}
}
/**
* Fetches the URL to redirect to for a given user (used after switching).
*
* @param WP_User $new_user Optional. The new user's WP_User object.
* @param WP_User $old_user Optional. The old user's WP_User object.
* @return string The URL to redirect to.
*/
protected static function get_redirect( WP_User $new_user = null, WP_User $old_user = null ) {
if ( ! empty( $_REQUEST['redirect_to'] ) ) {
$redirect_to = self::remove_query_args( wp_unslash( $_REQUEST['redirect_to'] ) );
$requested_redirect_to = wp_unslash( $_REQUEST['redirect_to'] );
} else {
$redirect_to = '';
$requested_redirect_to = '';
}
if ( ! $new_user ) {
/** This filter is documented in wp-login.php */
$redirect_to = apply_filters( 'logout_redirect', $redirect_to, $requested_redirect_to, $old_user );
} else {
/** This filter is documented in wp-login.php */
$redirect_to = apply_filters( 'login_redirect', $redirect_to, $requested_redirect_to, $new_user );
}
return $redirect_to;
}
/**
* Displays the 'Switched to {user}' and 'Switch back to {user}' messages in the admin area.
*/
public function action_admin_notices() {
$user = wp_get_current_user();
$old_user = self::get_old_user();
if ( $old_user ) {
?>
<div id="user_switching" class="updated notice is-dismissible">
<p><span class="dashicons dashicons-admin-users" style="color:#56c234" aria-hidden="true"></span>
<?php
$message = '';
$just_switched = isset( $_GET['user_switched'] );
if ( $just_switched ) {
$message = esc_html( sprintf(
/* Translators: 1: user display name; 2: username; */
__( 'Switched to %1$s (%2$s).', 'user-switching' ),
$user->display_name,
$user->user_login
) );
}
$switch_back_url = add_query_arg( array(
'redirect_to' => urlencode( self::current_url() ),
), self::switch_back_url( $old_user ) );
$message .= sprintf(
' <a href="%s">%s</a>.',
esc_url( $switch_back_url ),
esc_html( sprintf(
/* Translators: 1: user display name; 2: username; */
__( 'Switch back to %1$s (%2$s)', 'user-switching' ),
$old_user->display_name,
$old_user->user_login
) )
);
/**
* Filters the contents of the message that's displayed to switched users in the admin area.
*
* @since 1.1.0
*
* @param string $message The message displayed to the switched user.
* @param WP_User $user The current user object.
* @param WP_User $old_user The old user object.
* @param string $switch_back_url The switch back URL.
* @param bool $just_switched Whether the user made the switch on this page request.
*/
$message = apply_filters( 'user_switching_switched_message', $message, $user, $old_user, $switch_back_url, $just_switched );
// phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
echo $message;
?>
</p>
</div>
<?php
} elseif ( isset( $_GET['user_switched'] ) ) {
?>
<div id="user_switching" class="updated notice is-dismissible">
<p>
<?php
if ( isset( $_GET['switched_back'] ) ) {
echo esc_html( sprintf(
/* Translators: 1: user display name; 2: username; */
__( 'Switched back to %1$s (%2$s).', 'user-switching' ),
$user->display_name,
$user->user_login
) );
} else {
echo esc_html( sprintf(
/* Translators: 1: user display name; 2: username; */
__( 'Switched to %1$s (%2$s).', 'user-switching' ),
$user->display_name,
$user->user_login
) );
}
?>
</p>
</div>
<?php
}
}
/**
* Validates the old user cookie and returns its user data.
*
* @return false|WP_User False if there's no old user cookie or it's invalid, WP_User object if it's present and valid.
*/
public static function get_old_user() {
$cookie = user_switching_get_olduser_cookie();
if ( ! empty( $cookie ) ) {
$old_user_id = wp_validate_auth_cookie( $cookie, 'logged_in' );
if ( $old_user_id ) {
return get_userdata( $old_user_id );
}
}
return false;
}
/**
* Authenticates an old user by verifying the latest entry in the auth cookie.
*
* @param WP_User $user A WP_User object (usually from the logged_in cookie).
* @return bool Whether verification with the auth cookie passed.
*/
public static function authenticate_old_user( WP_User $user ) {
$cookie = user_switching_get_auth_cookie();
if ( ! empty( $cookie ) ) {
if ( self::secure_auth_cookie() ) {
$scheme = 'secure_auth';
} else {
$scheme = 'auth';
}
$old_user_id = wp_validate_auth_cookie( end( $cookie ), $scheme );
if ( $old_user_id ) {
return ( $user->ID === $old_user_id );
}
}
return false;
}
/**
* Adds a 'Switch back to {user}' link to the account menu, and a `Switch To` link to the user edit menu.
*
* @param WP_Admin_Bar $wp_admin_bar The admin bar object.
*/
public function action_admin_bar_menu( WP_Admin_Bar $wp_admin_bar ) {
if ( ! is_admin_bar_showing() ) {
return;
}
if ( method_exists( $wp_admin_bar, 'get_node' ) ) {
if ( $wp_admin_bar->get_node( 'user-actions' ) ) {
$parent = 'user-actions';
} else {
return;
}
} elseif ( get_option( 'show_avatars' ) ) {
$parent = 'my-account-with-avatar';
} else {
$parent = 'my-account';
}
$old_user = self::get_old_user();
if ( $old_user ) {
$wp_admin_bar->add_menu( array(
'parent' => $parent,
'id' => 'switch-back',
'title' => esc_html( sprintf(
/* Translators: 1: user display name; 2: username; */
__( 'Switch back to %1$s (%2$s)', 'user-switching' ),
$old_user->display_name,
$old_user->user_login
) ),
'href' => add_query_arg( array(
'redirect_to' => urlencode( self::current_url() ),
), self::switch_back_url( $old_user ) ),
) );
}
if ( current_user_can( 'switch_off' ) ) {
$url = self::switch_off_url( wp_get_current_user() );
if ( ! is_admin() ) {
$url = add_query_arg( array(
'redirect_to' => urlencode( self::current_url() ),
), $url );
}
$wp_admin_bar->add_menu( array(
'parent' => $parent,
'id' => 'switch-off',
/* Translators: "switch off" means to temporarily log out */
'title' => esc_html__( 'Switch Off', 'user-switching' ),
'href' => $url,
) );
}
if ( ! is_admin() && is_author() ) {
if ( $old_user ) {
$wp_admin_bar->add_menu( array(
'parent' => 'edit',
'id' => 'author-switch-back',
'title' => esc_html( sprintf(
/* Translators: 1: user display name; 2: username; */
__( 'Switch back to %1$s (%2$s)', 'user-switching' ),
$old_user->display_name,
$old_user->user_login
) ),
'href' => add_query_arg( array(
'redirect_to' => urlencode( self::current_url() ),
), self::switch_back_url( $old_user ) ),
) );
} elseif ( current_user_can( 'switch_to_user', get_queried_object_id() ) ) {
$wp_admin_bar->add_menu( array(
'parent' => 'edit',
'id' => 'author-switch-to',
'title' => esc_html__( 'Switch To', 'user-switching' ),
'href' => add_query_arg( array(
'redirect_to' => urlencode( self::current_url() ),
), self::switch_to_url( get_queried_object() ) ),
) );
}
}
}
/**
* Adds a 'Switch back to {user}' link to the Meta sidebar widget.
*/
public function action_wp_meta() {
$old_user = self::get_old_user();
if ( $old_user instanceof WP_User ) {
$link = sprintf(
/* Translators: 1: user display name; 2: username; */
__( 'Switch back to %1$s (%2$s)', 'user-switching' ),
$old_user->display_name,
$old_user->user_login
);
$url = add_query_arg( array(
'redirect_to' => urlencode( self::current_url() ),
), self::switch_back_url( $old_user ) );
echo '<li id="user_switching_switch_on"><a href="' . esc_url( $url ) . '">' . esc_html( $link ) . '</a></li>';
}
}
/**
* Adds a 'Switch back to {user}' link to the WordPress footer if the admin toolbar isn't showing.
*/
public function action_wp_footer() {
if ( is_admin_bar_showing() || did_action( 'wp_meta' ) ) {
return;
}
$old_user = self::get_old_user();
if ( $old_user instanceof WP_User ) {
$link = sprintf(
/* Translators: 1: user display name; 2: username; */
__( 'Switch back to %1$s (%2$s)', 'user-switching' ),
$old_user->display_name,
$old_user->user_login
);
$url = add_query_arg( array(
'redirect_to' => urlencode( self::current_url() ),
), self::switch_back_url( $old_user ) );
echo '<p id="user_switching_switch_on"><a href="' . esc_url( $url ) . '">' . esc_html( $link ) . '</a></p>';
}
}
/**
* Adds a 'Switch back to {user}' link to the WordPress login screen.
*
* @param string $message The login screen message.
* @return string The login screen message.
*/
public function filter_login_message( $message ) {
$old_user = self::get_old_user();
if ( $old_user instanceof WP_User ) {
$link = sprintf(
/* Translators: 1: user display name; 2: username; */
__( 'Switch back to %1$s (%2$s)', 'user-switching' ),
$old_user->display_name,
$old_user->user_login
);
$url = self::switch_back_url( $old_user );
if ( ! empty( $_REQUEST['interim-login'] ) ) {
$url = add_query_arg( array(
'interim-login' => '1',
), $url );
} elseif ( ! empty( $_REQUEST['redirect_to'] ) ) {
$url = add_query_arg( array(
'redirect_to' => urlencode( wp_unslash( $_REQUEST['redirect_to'] ) ),
), $url );
}
$message .= '<p class="message" id="user_switching_switch_on">';
$message .= '<span class="dashicons dashicons-admin-users" style="color:#56c234" aria-hidden="true"></span> ';
$message .= '<a href="' . esc_url( $url ) . '" onclick="window.location.href=\'' . esc_url( $url ) . '\';return false;">' . esc_html( $link ) . '</a>';
$message .= '</p>';
}
return $message;
}
/**
* Adds a 'Switch To' link to each list of user actions on the Users screen.
*
* @param string[] $actions The actions to display for this user row.
* @param WP_User $user The user object displayed in this row.
* @return string[] The actions to display for this user row.
*/
public function filter_user_row_actions( array $actions, WP_User $user ) {
$link = self::maybe_switch_url( $user );
if ( ! $link ) {
return $actions;
}
$actions['switch_to_user'] = '<a href="' . esc_url( $link ) . '">' . esc_html__( 'Switch To', 'user-switching' ) . '</a>';
return $actions;
}
/**
* Adds a 'Switch To' link to each member's profile page and profile listings in BuddyPress.
*/
public function action_bp_button() {
$user = null;
if ( bp_is_user() ) {
$user = get_userdata( bp_displayed_user_id() );
} elseif ( bp_is_members_directory() ) {
$user = get_userdata( bp_get_member_user_id() );
}
if ( ! $user ) {
return;
}
$link = self::maybe_switch_url( $user );
if ( ! $link ) {
return;
}
$link = add_query_arg( array(
'redirect_to' => urlencode( bp_core_get_user_domain( $user->ID ) ),
), $link );
$components = array_keys( buddypress()->active_components );
echo bp_get_button( array(
'id' => 'user_switching',
'component' => reset( $components ),
'link_href' => esc_url( $link ),
'link_text' => esc_html__( 'Switch To', 'user-switching' ),
'wrapper_id' => 'user_switching_switch_to',
) );
}
/**
* Adds a 'Switch To' link to each member's profile page in bbPress.
*/
public function action_bbpress_button() {
$user = get_userdata( bbp_get_user_id() );
if ( ! $user ) {
return;
}
$link = self::maybe_switch_url( $user );
if ( ! $link ) {
return;
}
$link = add_query_arg( array(
'redirect_to' => urlencode( bbp_get_user_profile_url( $user->ID ) ),
), $link );
?>
<ul id="user_switching_switch_to">
<li><a href="<?php echo esc_url( $link ); ?>"><?php esc_html_e( 'Switch To', 'user-switching' ); ?></a></li>
</ul>
<?php
}
/**
* Filters the list of query arguments which get removed from admin area URLs in WordPress.
*
* @link https://core.trac.wordpress.org/ticket/23367
*
* @param string[] $args List of removable query arguments.
* @return string[] Updated list of removable query arguments.
*/
public function filter_removable_query_args( array $args ) {
return array_merge( $args, array(
'user_switched',
'switched_off',
'switched_back',
) );
}
/**
* Returns the switch to or switch back URL for a given user.
*
* @param WP_User $user The user to be switched to.
* @return string|false The required URL, or false if there's no old user or the user doesn't have the required capability.
*/
public static function maybe_switch_url( WP_User $user ) {
$old_user = self::get_old_user();
if ( $old_user && ( $old_user->ID === $user->ID ) ) {
return self::switch_back_url( $old_user );
} elseif ( current_user_can( 'switch_to_user', $user->ID ) ) {
return self::switch_to_url( $user );
} else {
return false;
}
}
/**
* Returns the nonce-secured URL needed to switch to a given user ID.
*
* @param WP_User $user The user to be switched to.
* @return string The required URL.
*/
public static function switch_to_url( WP_User $user ) {
return wp_nonce_url( add_query_arg( array(
'action' => 'switch_to_user',
'user_id' => $user->ID,
'nr' => 1,
), wp_login_url() ), "switch_to_user_{$user->ID}" );
}
/**
* Returns the nonce-secured URL needed to switch back to the originating user.
*
* @param WP_User $user The old user.
* @return string The required URL.
*/
public static function switch_back_url( WP_User $user ) {
return wp_nonce_url( add_query_arg( array(
'action' => 'switch_to_olduser',
'nr' => 1,
), wp_login_url() ), "switch_to_olduser_{$user->ID}" );
}
/**
* Returns the nonce-secured URL needed to switch off the current user.
*
* @param WP_User $user The user to be switched off.
* @return string The required URL.
*/
public static function switch_off_url( WP_User $user ) {
return wp_nonce_url( add_query_arg( array(
'action' => 'switch_off',
'nr' => 1,
), wp_login_url() ), "switch_off_{$user->ID}" );
}
/**
* Returns the current URL.
*
* @return string The current URL.
*/
public static function current_url() {
return ( is_ssl() ? 'https://' : 'http://' ) . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI']; // @codingStandardsIgnoreLine
}
/**
* Removes a list of common confirmation-style query args from a URL.
*
* @param string $url A URL.
* @return string The URL with query args removed.
*/
public static function remove_query_args( $url ) {
if ( function_exists( 'wp_removable_query_args' ) ) {
$url = remove_query_arg( wp_removable_query_args(), $url );
}
return $url;
}
/**
* Returns whether or not User Switching's equivalent of the 'logged_in' cookie should be secure.
*
* This is used to set the 'secure' flag on the old user cookie, for enhanced security.
*
* @link https://core.trac.wordpress.org/ticket/15330
*
* @return bool Should the old user cookie be secure?
*/
public static function secure_olduser_cookie() {
return ( is_ssl() && ( 'https' === parse_url( home_url(), PHP_URL_SCHEME ) ) );
}
/**
* Returns whether or not User Switching's equivalent of the 'auth' cookie should be secure.
*
* This is used to determine whether to set a secure auth cookie or not.
*
* @return bool Should the auth cookie be secure?
*/
public static function secure_auth_cookie() {
return ( is_ssl() && ( 'https' === parse_url( wp_login_url(), PHP_URL_SCHEME ) ) );
}
/**
* Filters a user's capabilities so they can be altered at runtime.
*
* This is used to:
* - Grant the 'switch_to_user' capability to the user if they have the ability to edit the user they're trying to
* switch to (and that user is not themselves).
* - Grant the 'switch_off' capability to the user if they can edit other users.
*
* Important: This does not get called for Super Admins. See filter_map_meta_cap() below.
*
* @param bool[] $user_caps Array of key/value pairs where keys represent a capability name and boolean values
* represent whether the user has that capability.
* @param string[] $required_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.
* }
* @param WP_User $user Concerned user object.
* @return bool[] Concerned user's capabilities.
*/
public function filter_user_has_cap( array $user_caps, array $required_caps, array $args, WP_User $user ) {
if ( 'switch_to_user' === $args[0] ) {
if ( array_key_exists( 'switch_users', $user_caps ) ) {
$user_caps['switch_to_user'] = $user_caps['switch_users'];
return $user_caps;
}
$user_caps['switch_to_user'] = ( user_can( $user->ID, 'edit_user', $args[2] ) && ( $args[2] !== $user->ID ) );
} elseif ( 'switch_off' === $args[0] ) {
if ( array_key_exists( 'switch_users', $user_caps ) ) {
$user_caps['switch_off'] = $user_caps['switch_users'];
return $user_caps;
}
$user_caps['switch_off'] = user_can( $user->ID, 'edit_users' );
}
return $user_caps;
}
/**
* Filters the required primitive capabilities for the given primitive or meta capability.
*
* This is used to:
* - Add the 'do_not_allow' capability to the list of required capabilities when a Super Admin is trying to switch
* to themselves.
*
* It affects nothing else as Super Admins can do everything by default.
*
* @param string[] $required_caps Required primitive capabilities for the requested capability.
* @param string $cap Capability or meta capability being checked.
* @param int $user_id Concerned user ID.
* @param array $args {
* Arguments that accompany the requested capability check.
*
* @type mixed ...$0 Optional second and further parameters.
* }
* @return string[] Required capabilities for the requested action.
*/
public function filter_map_meta_cap( array $required_caps, $cap, $user_id, array $args ) {
if ( ( 'switch_to_user' === $cap ) && ( $args[0] === $user_id ) ) {
$required_caps[] = 'do_not_allow';
}
return $required_caps;
}
/**
* Singleton instantiator.
*
* @return user_switching User Switching instance.
*/
public static function get_instance() {
static $instance;
if ( ! isset( $instance ) ) {
$instance = new employee_switching();
}
return $instance;
}
/**
* Private class constructor. Use `get_instance()` to get the instance.
*/
final private function __construct() {}
}
if ( ! function_exists( 'user_switching_set_olduser_cookie' ) ) {
/**
* Sets authorisation cookies containing the originating user information.
*
* @since 1.4.0 The `$token` parameter was added.
*
* @param int $old_user_id The ID of the originating user, usually the current logged in user.
* @param bool $pop Optional. Pop the latest user off the auth cookie, instead of appending the new one. Default false.
* @param string $token Optional. The old user's session token to store for later reuse. Default empty string.
*/
function user_switching_set_olduser_cookie( $old_user_id, $pop = false, $token = '' ) {
$secure_auth_cookie = employee_switching::secure_auth_cookie();
$secure_olduser_cookie = employee_switching::secure_olduser_cookie();
$expiration = time() + 172800; // 48 hours
$auth_cookie = user_switching_get_auth_cookie();
$olduser_cookie = wp_generate_auth_cookie( $old_user_id, $expiration, 'logged_in', $token );
if ( $secure_auth_cookie ) {
$auth_cookie_name = USER_SWITCHING_SECURE_COOKIE;
$scheme = 'secure_auth';
} else {
$auth_cookie_name = USER_SWITCHING_COOKIE;
$scheme = 'auth';
}
if ( $pop ) {
array_pop( $auth_cookie );
} else {
array_push( $auth_cookie, wp_generate_auth_cookie( $old_user_id, $expiration, $scheme, $token ) );
}
$auth_cookie = json_encode( $auth_cookie );
/**
* Fires immediately before the User Switching authentication cookie is set.
*
* @since 1.4.0
*
* @param string $auth_cookie JSON-encoded array of authentication cookie values.
* @param int $expiration The time when the authentication cookie expires as a UNIX timestamp.
* Default is 48 hours from now.
* @param int $old_user_id User ID.
* @param string $scheme Authentication scheme. Values include 'auth' or 'secure_auth'.
* @param string $token User's session token to use for the latest cookie.
*/
do_action( 'set_user_switching_cookie', $auth_cookie, $expiration, $old_user_id, $scheme, $token );
/**
* Fires immediately before the User Switching old user cookie is set.
*
* @since 1.4.0
*
* @param string $olduser_cookie The old user cookie value.
* @param int $expiration The time when the logged-in authentication cookie expires as a UNIX timestamp.
* Default is 48 hours from now.
* @param int $old_user_id User ID.
* @param string $scheme Authentication scheme. Default 'logged_in'.
* @param string $token User's session token to use for this cookie.
*/
do_action( 'set_olduser_cookie', $olduser_cookie, $expiration, $old_user_id, 'logged_in', $token );
/** This filter is documented in wp-includes/pluggable.php */
if ( ! apply_filters( 'send_auth_cookies', true ) ) {
return;
}
setcookie( $auth_cookie_name, $auth_cookie, $expiration, SITECOOKIEPATH, COOKIE_DOMAIN, $secure_auth_cookie, true );
setcookie( USER_SWITCHING_OLDUSER_COOKIE, $olduser_cookie, $expiration, COOKIEPATH, COOKIE_DOMAIN, $secure_olduser_cookie, true );
}
}
if ( ! function_exists( 'user_switching_clear_olduser_cookie' ) ) {
/**
* Clears the cookies containing the originating user, or pops the latest item off the end if there's more than one.
*
* @param bool $clear_all Optional. Whether to clear the cookies (as opposed to just popping the last user off the end). Default true.
*/
function user_switching_clear_olduser_cookie( $clear_all = true ) {
$auth_cookie = user_switching_get_auth_cookie();
if ( ! empty( $auth_cookie ) ) {
array_pop( $auth_cookie );
}
if ( $clear_all || empty( $auth_cookie ) ) {
/**
* Fires just before the user switching cookies are cleared.
*
* @since 1.4.0
*/
do_action( 'clear_olduser_cookie' );
/** This filter is documented in wp-includes/pluggable.php */
if ( ! apply_filters( 'send_auth_cookies', true ) ) {
return;
}
$expire = time() - 31536000;
setcookie( USER_SWITCHING_COOKIE, ' ', $expire, SITECOOKIEPATH, COOKIE_DOMAIN );
setcookie( USER_SWITCHING_SECURE_COOKIE, ' ', $expire, SITECOOKIEPATH, COOKIE_DOMAIN );
setcookie( USER_SWITCHING_OLDUSER_COOKIE, ' ', $expire, COOKIEPATH, COOKIE_DOMAIN );
} else {
if ( user_switching::secure_auth_cookie() ) {
$scheme = 'secure_auth';
} else {
$scheme = 'auth';
}
$old_cookie = end( $auth_cookie );
$old_user_id = wp_validate_auth_cookie( $old_cookie, $scheme );
if ( $old_user_id ) {
$parts = wp_parse_auth_cookie( $old_cookie, $scheme );
user_switching_set_olduser_cookie( $old_user_id, true, $parts['token'] );
}
}
}
}
if ( ! function_exists( 'user_switching_get_olduser_cookie' ) ) {
/**
* Gets the value of the cookie containing the originating user.
*
* @return string|false The old user cookie, or boolean false if there isn't one.
*/
function user_switching_get_olduser_cookie() {
if ( isset( $_COOKIE[ USER_SWITCHING_OLDUSER_COOKIE ] ) ) {