Merge "Add support for PHP7 random_bytes in favor of mcrypt_create_iv"
[lhc/web/wiklou.git] / includes / specials / SpecialUserrights.php
index b1f8a17..b33aa7d 100644 (file)
@@ -85,6 +85,8 @@ class UserrightsPage extends SpecialPage {
                $session = $request->getSession();
                $out = $this->getOutput();
 
+               $out->addModules( [ 'mediawiki.special.userrights' ] );
+
                if ( $par !== null ) {
                        $this->mTarget = $par;
                } else {
@@ -117,7 +119,6 @@ class UserrightsPage extends SpecialPage {
                        // Remove session data for the success message
                        $session->remove( 'specialUserrightsSaveSuccess' );
 
-                       $out->addModules( [ 'mediawiki.special.userrights' ] );
                        $out->addModuleStyles( 'mediawiki.notification.convertmessagebox.styles' );
                        $out->addHTML(
                                Html::rawElement(
@@ -169,8 +170,8 @@ class UserrightsPage extends SpecialPage {
                        }
 
                        $targetUser = $this->mFetchedUser;
-                       if ( $targetUser instanceof User ) { // UserRightsProxy doesn't have this method (bug 61252)
-                               $targetUser->clearInstanceCache(); // bug 38989
+                       if ( $targetUser instanceof User ) { // UserRightsProxy doesn't have this method (T63252)
+                               $targetUser->clearInstanceCache(); // T40989
                        }
 
                        if ( $request->getVal( 'conflictcheck-originalgroups' )
@@ -178,18 +179,22 @@ class UserrightsPage extends SpecialPage {
                        ) {
                                $out->addWikiMsg( 'userrights-conflict' );
                        } else {
-                               $this->saveUserGroups(
+                               $status = $this->saveUserGroups(
                                        $this->mTarget,
                                        $request->getVal( 'user-reason' ),
                                        $targetUser
                                );
 
-                               // Set session data for the success message
-                               $session->set( 'specialUserrightsSaveSuccess', 1 );
-
-                               $out->redirect( $this->getSuccessURL() );
+                               if ( $status->isOK() ) {
+                                       // Set session data for the success message
+                                       $session->set( 'specialUserrightsSaveSuccess', 1 );
 
-                               return;
+                                       $out->redirect( $this->getSuccessURL() );
+                                       return;
+                               } else {
+                                       // Print an error message and redisplay the form
+                                       $out->addWikiText( '<div class="error">' . $status->getWikiText() . '</div>' );
+                               }
                        }
                }
 
@@ -203,6 +208,41 @@ class UserrightsPage extends SpecialPage {
                return $this->getPageTitle( $this->mTarget )->getFullURL();
        }
 
+       /**
+        * Returns true if this user rights form can set and change user group expiries.
+        * Subclasses may wish to override this to return false.
+        *
+        * @return bool
+        */
+       public function canProcessExpiries() {
+               return !$this->getConfig()->get( 'DisableUserGroupExpiry' );
+       }
+
+       /**
+        * Converts a user group membership expiry string into a timestamp. Words like
+        * 'existing' or 'other' should have been filtered out before calling this
+        * function.
+        *
+        * @param string $expiry
+        * @return string|null|false A string containing a valid timestamp, or null
+        *   if the expiry is infinite, or false if the timestamp is not valid
+        */
+       public static function expiryToTimestamp( $expiry ) {
+               if ( wfIsInfinity( $expiry ) ) {
+                       return null;
+               }
+
+               $unix = strtotime( $expiry );
+
+               if ( !$unix || $unix === -1 ) {
+                       return false;
+               }
+
+               // @todo FIXME: Non-qualified absolute times are not in users specified timezone
+               // and there isn't notice about it in the ui (see ProtectionForm::getExpiry)
+               return wfTimestamp( TS_MW, $unix );
+       }
+
        /**
         * Save user groups changes in the database.
         * Data comes from the editUserGroupsForm() form function
@@ -210,12 +250,14 @@ class UserrightsPage extends SpecialPage {
         * @param string $username Username to apply changes to.
         * @param string $reason Reason for group change
         * @param User|UserRightsProxy $user Target user object.
-        * @return null
+        * @return Status
         */
-       function saveUserGroups( $username, $reason, $user ) {
+       protected function saveUserGroups( $username, $reason, $user ) {
                $allgroups = $this->getAllGroups();
                $addgroup = [];
+               $groupExpiries = []; // associative array of (group name => expiry)
                $removegroup = [];
+               $existingUGMs = $user->getGroupMemberships();
 
                // This could possibly create a highly unlikely race condition if permissions are changed between
                //  when the form is loaded and when the form is saved. Ignoring it for the moment.
@@ -224,45 +266,103 @@ class UserrightsPage extends SpecialPage {
                        // Later on, this gets filtered for what can actually be removed
                        if ( $this->getRequest()->getCheck( "wpGroup-$group" ) ) {
                                $addgroup[] = $group;
+
+                               if ( $this->canProcessExpiries() ) {
+                                       // read the expiry information from the request
+                                       $expiryDropdown = $this->getRequest()->getVal( "wpExpiry-$group" );
+                                       if ( $expiryDropdown === 'existing' ) {
+                                               continue;
+                                       }
+
+                                       if ( $expiryDropdown === 'other' ) {
+                                               $expiryValue = $this->getRequest()->getVal( "wpExpiry-$group-other" );
+                                       } else {
+                                               $expiryValue = $expiryDropdown;
+                                       }
+
+                                       // validate the expiry
+                                       $groupExpiries[$group] = self::expiryToTimestamp( $expiryValue );
+
+                                       if ( $groupExpiries[$group] === false ) {
+                                               return Status::newFatal( 'userrights-invalid-expiry', $group );
+                                       }
+
+                                       // not allowed to have things expiring in the past
+                                       if ( $groupExpiries[$group] && $groupExpiries[$group] < wfTimestampNow() ) {
+                                               return Status::newFatal( 'userrights-expiry-in-past', $group );
+                                       }
+
+                                       // if the user can only add this group (not remove it), the expiry time
+                                       // cannot be brought forward (T156784)
+                                       if ( !$this->canRemove( $group ) &&
+                                               isset( $existingUGMs[$group] ) &&
+                                               ( $existingUGMs[$group]->getExpiry() ?: 'infinity' ) >
+                                                       ( $groupExpiries[$group] ?: 'infinity' )
+                                       ) {
+                                               return Status::newFatal( 'userrights-cannot-shorten-expiry', $group );
+                                       }
+                               }
                        } else {
                                $removegroup[] = $group;
                        }
                }
 
-               $this->doSaveUserGroups( $user, $addgroup, $removegroup, $reason );
+               $this->doSaveUserGroups( $user, $addgroup, $removegroup, $reason, [], $groupExpiries );
+
+               return Status::newGood();
        }
 
        /**
-        * Save user groups changes in the database.
+        * Save user groups changes in the database. This function does not throw errors;
+        * instead, it ignores groups that the performer does not have permission to set.
         *
         * @param User|UserRightsProxy $user
         * @param array $add Array of groups to add
         * @param array $remove Array of groups to remove
         * @param string $reason Reason for group change
         * @param array $tags Array of change tags to add to the log entry
+        * @param array $groupExpiries Associative array of (group name => expiry),
+        *   containing only those groups that are to have new expiry values set
         * @return array Tuple of added, then removed groups
         */
-       function doSaveUserGroups( $user, $add, $remove, $reason = '', $tags = [] ) {
+       function doSaveUserGroups( $user, $add, $remove, $reason = '', $tags = [],
+               $groupExpiries = [] ) {
+
                // Validate input set...
                $isself = $user->getName() == $this->getUser()->getName();
                $groups = $user->getGroups();
+               $ugms = $user->getGroupMemberships();
                $changeable = $this->changeableGroups();
                $addable = array_merge( $changeable['add'], $isself ? $changeable['add-self'] : [] );
                $removable = array_merge( $changeable['remove'], $isself ? $changeable['remove-self'] : [] );
 
                $remove = array_unique(
                        array_intersect( (array)$remove, $removable, $groups ) );
-               $add = array_unique( array_diff(
-                       array_intersect( (array)$add, $addable ),
-                       $groups )
-               );
+               $add = array_intersect( (array)$add, $addable );
+
+               // add only groups that are not already present or that need their expiry updated,
+               // UNLESS the user can only add this group (not remove it) and the expiry time
+               // is being brought forward (T156784)
+               $add = array_filter( $add,
+                       function( $group ) use ( $groups, $groupExpiries, $removable, $ugms ) {
+                               if ( isset( $groupExpiries[$group] ) &&
+                                       !in_array( $group, $removable ) &&
+                                       isset( $ugms[$group] ) &&
+                                       ( $ugms[$group]->getExpiry() ?: 'infinity' ) >
+                                               ( $groupExpiries[$group] ?: 'infinity' )
+                               ) {
+                                       return false;
+                               }
+                               return !in_array( $group, $groups ) || array_key_exists( $group, $groupExpiries );
+                       } );
 
                Hooks::run( 'ChangeUserGroups', [ $this->getUser(), $user, &$add, &$remove ] );
 
-               $oldGroups = $user->getGroups();
+               $oldGroups = $groups;
+               $oldUGMs = $user->getGroupMemberships();
                $newGroups = $oldGroups;
 
-               // Remove then add groups
+               // Remove groups, then add new ones/update expiries of existing ones
                if ( $remove ) {
                        foreach ( $remove as $index => $group ) {
                                if ( !$user->removeGroup( $group ) ) {
@@ -273,13 +373,15 @@ class UserrightsPage extends SpecialPage {
                }
                if ( $add ) {
                        foreach ( $add as $index => $group ) {
-                               if ( !$user->addGroup( $group ) ) {
+                               $expiry = isset( $groupExpiries[$group] ) ? $groupExpiries[$group] : null;
+                               if ( !$user->addGroup( $group, $expiry ) ) {
                                        unset( $add[$index] );
                                }
                        }
                        $newGroups = array_merge( $newGroups, $add );
                }
                $newGroups = array_unique( $newGroups );
+               $newUGMs = $user->getGroupMemberships();
 
                // Ensure that caches are cleared
                $user->invalidateCache();
@@ -292,25 +394,59 @@ class UserrightsPage extends SpecialPage {
 
                wfDebug( 'oldGroups: ' . print_r( $oldGroups, true ) . "\n" );
                wfDebug( 'newGroups: ' . print_r( $newGroups, true ) . "\n" );
+               wfDebug( 'oldUGMs: ' . print_r( $oldUGMs, true ) . "\n" );
+               wfDebug( 'newUGMs: ' . print_r( $newUGMs, true ) . "\n" );
                // Deprecated in favor of UserGroupsChanged hook
                Hooks::run( 'UserRights', [ &$user, $add, $remove ], '1.26' );
 
-               if ( $newGroups != $oldGroups ) {
-                       $this->addLogEntry( $user, $oldGroups, $newGroups, $reason, $tags );
+               // Only add a log entry if something actually changed
+               if ( $newGroups != $oldGroups || $newUGMs != $oldUGMs ) {
+                       $this->addLogEntry( $user, $oldGroups, $newGroups, $reason, $tags, $oldUGMs, $newUGMs );
                }
 
                return [ $add, $remove ];
        }
 
+       /**
+        * Serialise a UserGroupMembership object for storage in the log_params section
+        * of the logging table. Only keeps essential data, removing redundant fields.
+        *
+        * @param UserGroupMembership|null $ugm May be null if things get borked
+        * @return array
+        */
+       protected static function serialiseUgmForLog( $ugm ) {
+               if ( !$ugm instanceof UserGroupMembership ) {
+                       return null;
+               }
+               return [ 'expiry' => $ugm->getExpiry() ];
+       }
+
        /**
         * Add a rights log entry for an action.
-        * @param User $user
+        * @param User|UserRightsProxy $user
         * @param array $oldGroups
         * @param array $newGroups
         * @param array $reason
-        * @param array $tags
+        * @param array $tags Change tags for the log entry
+        * @param array $oldUGMs Associative array of (group name => UserGroupMembership)
+        * @param array $newUGMs Associative array of (group name => UserGroupMembership)
         */
-       function addLogEntry( $user, $oldGroups, $newGroups, $reason, $tags ) {
+       protected function addLogEntry( $user, $oldGroups, $newGroups, $reason, $tags,
+               $oldUGMs, $newUGMs ) {
+
+               // make sure $oldUGMs and $newUGMs are in the same order, and serialise
+               // each UGM object to a simplified array
+               $oldUGMs = array_map( function( $group ) use ( $oldUGMs ) {
+                       return isset( $oldUGMs[$group] ) ?
+                               self::serialiseUgmForLog( $oldUGMs[$group] ) :
+                               null;
+               }, $oldGroups );
+               $newUGMs = array_map( function( $group ) use ( $newUGMs ) {
+                       return isset( $newUGMs[$group] ) ?
+                               self::serialiseUgmForLog( $newUGMs[$group] ) :
+                               null;
+               }, $newGroups );
+
                $logEntry = new ManualLogEntry( 'rights', 'rights' );
                $logEntry->setPerformer( $this->getUser() );
                $logEntry->setTarget( $user->getUserPage() );
@@ -318,6 +454,8 @@ class UserrightsPage extends SpecialPage {
                $logEntry->setParameters( [
                        '4::oldgroups' => $oldGroups,
                        '5::newgroups' => $newGroups,
+                       'oldmetadata' => $oldUGMs,
+                       'newmetadata' => $newUGMs,
                ] );
                $logid = $logEntry->insert();
                if ( count( $tags ) ) {
@@ -341,8 +479,8 @@ class UserrightsPage extends SpecialPage {
                }
 
                $groups = $user->getGroups();
-
-               $this->showEditUserGroupsForm( $user, $groups );
+               $groupMemberships = $user->getGroupMemberships();
+               $this->showEditUserGroupsForm( $user, $groups, $groupMemberships );
 
                // This isn't really ideal logging behavior, but let's not hide the
                // interwiki logs if we're using them as is.
@@ -475,35 +613,47 @@ class UserrightsPage extends SpecialPage {
         * Show the form to edit group memberships.
         *
         * @param User|UserRightsProxy $user User or UserRightsProxy you're editing
-        * @param array $groups Array of groups the user is in
+        * @param array $groups Array of groups the user is in. Not used by this implementation
+        *   anymore, but kept for backward compatibility with subclasses
+        * @param array $groupMemberships Associative array of (group name => UserGroupMembership
+        *   object) containing the groups the user is in
         */
-       protected function showEditUserGroupsForm( $user, $groups ) {
-               $list = [];
-               $membersList = [];
-               foreach ( $groups as $group ) {
-                       $list[] = self::buildGroupLink( $group );
-                       $membersList[] = self::buildGroupMemberLink( $group );
+       protected function showEditUserGroupsForm( $user, $groups, $groupMemberships ) {
+               $list = $membersList = $tempList = $tempMembersList = [];
+               foreach ( $groupMemberships as $ugm ) {
+                       $linkG = UserGroupMembership::getLink( $ugm, $this->getContext(), 'html' );
+                       $linkM = UserGroupMembership::getLink( $ugm, $this->getContext(), 'html',
+                               $user->getName() );
+                       if ( $ugm->getExpiry() ) {
+                               $tempList[] = $linkG;
+                               $tempMembersList[] = $linkM;
+                       } else {
+                               $list[] = $linkG;
+                               $membersList[] = $linkM;
+
+                       }
                }
 
                $autoList = [];
                $autoMembersList = [];
                if ( $user instanceof User ) {
                        foreach ( Autopromote::getAutopromoteGroups( $user ) as $group ) {
-                               $autoList[] = self::buildGroupLink( $group );
-                               $autoMembersList[] = self::buildGroupMemberLink( $group );
+                               $autoList[] = UserGroupMembership::getLink( $group, $this->getContext(), 'html' );
+                               $autoMembersList[] = UserGroupMembership::getLink( $group, $this->getContext(),
+                                       'html', $user->getName() );
                        }
                }
 
                $language = $this->getLanguage();
                $displayedList = $this->msg( 'userrights-groupsmember-type' )
                        ->rawParams(
-                               $language->listToText( $list ),
-                               $language->listToText( $membersList )
+                               $language->commaList( array_merge( $tempList, $list ) ),
+                               $language->commaList( array_merge( $tempMembersList, $membersList ) )
                        )->escaped();
                $displayedAutolist = $this->msg( 'userrights-groupsmember-type' )
                        ->rawParams(
-                               $language->listToText( $autoList ),
-                               $language->listToText( $autoMembersList )
+                               $language->commaList( $autoList ),
+                               $language->commaList( $autoMembersList )
                        )->escaped();
 
                $grouplist = '';
@@ -532,7 +682,8 @@ class UserrightsPage extends SpecialPage {
                        Linker::TOOL_LINKS_EMAIL /* Add "send e-mail" link */
                );
 
-               list( $groupCheckboxes, $canChangeAny ) = $this->groupCheckboxes( $groups, $user );
+               list( $groupCheckboxes, $canChangeAny ) =
+                       $this->groupCheckboxes( $groupMemberships, $user );
                $this->getOutput()->addHTML(
                        Xml::openElement(
                                'form',
@@ -598,26 +749,6 @@ class UserrightsPage extends SpecialPage {
                );
        }
 
-       /**
-        * Format a link to a group description page
-        *
-        * @param string $group
-        * @return string
-        */
-       private static function buildGroupLink( $group ) {
-               return User::makeGroupLinkHTML( $group, User::getGroupName( $group ) );
-       }
-
-       /**
-        * Format a link to a group member description page
-        *
-        * @param string $group
-        * @return string
-        */
-       private static function buildGroupMemberLink( $group ) {
-               return User::makeGroupLinkHTML( $group, User::getGroupMember( $group ) );
-       }
-
        /**
         * Returns an array of all groups that may be edited
         * @return array Array of groups that may be edited.
@@ -629,8 +760,8 @@ class UserrightsPage extends SpecialPage {
        /**
         * Adds a table with checkboxes where you can select what groups to add/remove
         *
-        * @todo Just pass the username string?
-        * @param array $usergroups Groups the user belongs to
+        * @param array $usergroups Associative array of (group name as string =>
+        *   UserGroupMembership object) for groups the user belongs to
         * @param User $user
         * @return Array with 2 elements: the XHTML table element with checkxboes, and
         * whether any groups are changeable
@@ -639,28 +770,42 @@ class UserrightsPage extends SpecialPage {
                $allgroups = $this->getAllGroups();
                $ret = '';
 
+               // Get the list of preset expiry times from the system message
+               $expiryOptionsMsg = $this->msg( 'userrights-expiry-options' )->inContentLanguage();
+               $expiryOptions = $expiryOptionsMsg->isDisabled() ?
+                       [] :
+                       explode( ',', $expiryOptionsMsg->text() );
+
                // Put all column info into an associative array so that extensions can
                // more easily manage it.
                $columns = [ 'unchangeable' => [], 'changeable' => [] ];
 
                foreach ( $allgroups as $group ) {
-                       $set = in_array( $group, $usergroups );
+                       $set = isset( $usergroups[$group] );
+                       // Users who can add the group, but not remove it, can only lengthen
+                       // expiries, not shorten them. So they should only see the expiry
+                       // dropdown if the group currently has a finite expiry
+                       $canOnlyLengthenExpiry = ( $set && $this->canAdd( $group ) &&
+                                !$this->canRemove( $group ) && $usergroups[$group]->getExpiry() );
                        // Should the checkbox be disabled?
-                       $disabled = !(
+                       $disabledCheckbox = !(
                                ( $set && $this->canRemove( $group ) ) ||
                                ( !$set && $this->canAdd( $group ) ) );
+                       // Should the expiry elements be disabled?
+                       $disabledExpiry = $disabledCheckbox && !$canOnlyLengthenExpiry;
                        // Do we need to point out that this action is irreversible?
-                       $irreversible = !$disabled && (
+                       $irreversible = !$disabledCheckbox && (
                                ( $set && !$this->canAdd( $group ) ) ||
                                ( !$set && !$this->canRemove( $group ) ) );
 
                        $checkbox = [
                                'set' => $set,
-                               'disabled' => $disabled,
+                               'disabled' => $disabledCheckbox,
+                               'disabled-expiry' => $disabledExpiry,
                                'irreversible' => $irreversible
                        ];
 
-                       if ( $disabled ) {
+                       if ( $disabledCheckbox && $disabledExpiry ) {
                                $columns['unchangeable'][$group] = $checkbox;
                        } else {
                                $columns['changeable'][$group] = $checkbox;
@@ -691,18 +836,110 @@ class UserrightsPage extends SpecialPage {
                        foreach ( $column as $group => $checkbox ) {
                                $attr = $checkbox['disabled'] ? [ 'disabled' => 'disabled' ] : [];
 
-                               $member = User::getGroupMember( $group, $user->getName() );
+                               $member = UserGroupMembership::getGroupMemberName( $group, $user->getName() );
                                if ( $checkbox['irreversible'] ) {
                                        $text = $this->msg( 'userrights-irreversible-marker', $member )->text();
+                               } elseif ( $checkbox['disabled'] && !$checkbox['disabled-expiry'] ) {
+                                       $text = $this->msg( 'userrights-no-shorten-expiry-marker', $member )->text();
                                } else {
                                        $text = $member;
                                }
                                $checkboxHtml = Xml::checkLabel( $text, "wpGroup-" . $group,
                                        "wpGroup-" . $group, $checkbox['set'], $attr );
-                               $ret .= "\t\t" . ( $checkbox['disabled']
-                                       ? Xml::tags( 'span', [ 'class' => 'mw-userrights-disabled' ], $checkboxHtml )
-                                       : $checkboxHtml
-                               ) . "<br />\n";
+                               $ret .= "\t\t" . ( ( $checkbox['disabled'] && $checkbox['disabled-expiry'] )
+                                       ? Xml::tags( 'div', [ 'class' => 'mw-userrights-disabled' ], $checkboxHtml )
+                                       : Xml::tags( 'div', [], $checkboxHtml )
+                               ) . "\n";
+
+                               if ( $this->canProcessExpiries() ) {
+                                       $uiUser = $this->getUser();
+                                       $uiLanguage = $this->getLanguage();
+
+                                       $currentExpiry = isset( $usergroups[$group] ) ?
+                                               $usergroups[$group]->getExpiry() :
+                                               null;
+
+                                       // If the user can't modify the expiry, print the current expiry below
+                                       // it in plain text. Otherwise provide UI to set/change the expiry
+                                       if ( $checkbox['set'] &&
+                                               ( $checkbox['irreversible'] || $checkbox['disabled-expiry'] )
+                                       ) {
+                                               if ( $currentExpiry ) {
+                                                       $expiryFormatted = $uiLanguage->userTimeAndDate( $currentExpiry, $uiUser );
+                                                       $expiryFormattedD = $uiLanguage->userDate( $currentExpiry, $uiUser );
+                                                       $expiryFormattedT = $uiLanguage->userTime( $currentExpiry, $uiUser );
+                                                       $expiryHtml = $this->msg( 'userrights-expiry-current' )->params(
+                                                               $expiryFormatted, $expiryFormattedD, $expiryFormattedT )->text();
+                                               } else {
+                                                       $expiryHtml = $this->msg( 'userrights-expiry-none' )->text();
+                                               }
+                                               $expiryHtml .= "<br />\n";
+                                       } else {
+                                               $expiryHtml = Xml::element( 'span', null,
+                                                       $this->msg( 'userrights-expiry' )->text() );
+                                               $expiryHtml .= Xml::openElement( 'span' );
+
+                                               // add a form element to set the expiry date
+                                               $expiryFormOptions = new XmlSelect(
+                                                       "wpExpiry-$group",
+                                                       "mw-input-wpExpiry-$group", // forward compatibility with HTMLForm
+                                                       $currentExpiry ? 'existing' : 'infinite'
+                                               );
+                                               if ( $checkbox['disabled-expiry'] ) {
+                                                       $expiryFormOptions->setAttribute( 'disabled', 'disabled' );
+                                               }
+
+                                               if ( $currentExpiry ) {
+                                                       $timestamp = $uiLanguage->userTimeAndDate( $currentExpiry, $uiUser );
+                                                       $d = $uiLanguage->userDate( $currentExpiry, $uiUser );
+                                                       $t = $uiLanguage->userTime( $currentExpiry, $uiUser );
+                                                       $existingExpiryMessage = $this->msg( 'userrights-expiry-existing',
+                                                               $timestamp, $d, $t );
+                                                       $expiryFormOptions->addOption( $existingExpiryMessage->text(), 'existing' );
+                                               }
+
+                                               $expiryFormOptions->addOption(
+                                                       $this->msg( 'userrights-expiry-none' )->text(),
+                                                       'infinite'
+                                               );
+                                               $expiryFormOptions->addOption(
+                                                       $this->msg( 'userrights-expiry-othertime' )->text(),
+                                                       'other'
+                                               );
+                                               foreach ( $expiryOptions as $option ) {
+                                                       if ( strpos( $option, ":" ) === false ) {
+                                                               $displayText = $value = $option;
+                                                       } else {
+                                                               list( $displayText, $value ) = explode( ":", $option );
+                                                       }
+                                                       $expiryFormOptions->addOption( $displayText, htmlspecialchars( $value ) );
+                                               }
+
+                                               // Add expiry dropdown
+                                               $expiryHtml .= $expiryFormOptions->getHTML() . '<br />';
+
+                                               // Add custom expiry field
+                                               $attribs = [ 'id' => "mw-input-wpExpiry-$group-other" ];
+                                               if ( $checkbox['disabled-expiry'] ) {
+                                                       $attribs['disabled'] = 'disabled';
+                                               }
+                                               $expiryHtml .= Xml::input( "wpExpiry-$group-other", 30, '', $attribs );
+
+                                               // If the user group is set but the checkbox is disabled, mimic a
+                                               // checked checkbox in the form submission
+                                               if ( $checkbox['set'] && $checkbox['disabled'] ) {
+                                                       $expiryHtml .= Html::hidden( "wpGroup-$group", 1 );
+                                               }
+
+                                               $expiryHtml .= Xml::closeElement( 'span' );
+                                       }
+
+                                       $divAttribs = [
+                                               'id' => "mw-userrights-nested-wpGroup-$group",
+                                               'class' => 'mw-userrights-nested',
+                                       ];
+                                       $ret .= "\t\t\t" . Xml::tags( 'div', $divAttribs, $expiryHtml ) . "\n";
+                               }
                        }
                        $ret .= "\t</td>\n";
                }