Merge remote-tracking branch '39001/bug/AC-12432-file-required-validation' into commprs_dec

Author: engcom-Charlie

app/code/Magento/Ui/view/base/web/js/form/element/media.js

@@ -1,6 +1,6 @@
 /**
- * Copyright © Magento, Inc. All rights reserved.
- * See COPYING.txt for license details.
+ * Copyright 2015 Adobe
+ * All Rights Reserved.
  */
 
 /**
@@ -14,6 +14,7 @@ define([
 
     return Abstract.extend({
         defaults: {
+            value: '',
             links: {
                 value: ''
             }
@@ -47,6 +48,16 @@ define([
             this.formId = namespace[0];
 
             return this;
+        },
+
+        /**
+         * Set the file input value
+         *
+         * @param {FileUploader} fileUploader - UI Class
+         * @param {Event} e
+         */
+        setFileValue: function (fileUploader, e) {
+            this.value(e.target.files.length ? e.target.files.length : '');
         }
     });
 });

app/code/Magento/Ui/view/base/web/templates/form/element/media.html

@@ -1,8 +1,8 @@
 <!--
-/**
- * Copyright © Magento, Inc. All rights reserved.
- * See COPYING.txt for license details.
- */
+ /**
+  * Copyright 2011 Adobe
+  * All Rights Reserved.
+  */
 -->
 <input class="admin__control-file" type="file" data-bind="
     hasFocus: focused,
@@ -13,5 +13,5 @@
         id: uid,
         disabled: disabled,
         form: formId
-    }"
-/>
+    }, event:{change: setFileValue}"
+>