Enh: Added virtual profile fields to display users e-mail address and username

protected/humhub/docs/CHANGELOG_DEV.md

@@ -18,3 +18,4 @@ HumHub Change Log
 - Enh: Added `humhub\modules\ui\form\widgets\JsInputWidget:emptyResult()` helper to manage render state of JsInputWidget
 - Enh: Added `humhub\modules\ui\form\widgets\JsInputWidget:field` in order to access ActiveField instances within JsInputWidget
 - Enh #4216: Added `humhub\modules\ui\filter\widgets\DropdownFilterInput` in order to support dropdown stream filters
+- Enh: Added virtual profile fields to display users e-mail address and username

protected/humhub/modules/user/models/fieldtype/BaseType.php

@@ -85,6 +85,7 @@ class BaseType extends Model
             Checkbox::class => Yii::t('UserModule.profile', 'Checkbox'),
             CheckboxList::class => Yii::t('UserModule.profile', 'Checkbox List'),
             UserEmail::class => Yii::t('UserModule.profile', 'E-mail address of the user'),
+            UserName::class => Yii::t('UserModule.profile', 'Username'),
         ], $this->fieldTypes);
 
         return $fieldTypes;

protected/humhub/modules/user/models/fieldtype/UserName.php

@@ -0,0 +1,33 @@
+<?php
+
+/**
+ * @link https://www.humhub.org/
+ * @copyright Copyright (c) 2020 HumHub GmbH & Co. KG
+ * @license https://www.humhub.com/licences
+ */
+
+namespace humhub\modules\user\models\fieldtype;
+
+use humhub\libs\Html;
+
+/**
+ * UserName is a virtual profile field
+ * that displays the current user name of the user.
+ *
+ * @since 1.6
+ */
+class UserName extends BaseTypeVirtual
+{
+
+    /**
+     * @inheritDoc
+     */
+    public function getVirtualUserValue($user, $raw = true)
+    {
+        if (empty($user->username)) {
+            return '';
+        }
+
+        return Html::encode($user->username);
+    }
+}