PLT-6924 Added ability to disable file uploads/downloads on old mobile apps (#7117)

webapp/utils/file_utils.jsx

@@ -0,0 +1,24 @@
+// Copyright (c) 2017-present Mattermost, Inc. All Rights Reserved.
+// See License.txt for license information.
+
+import * as UserAgent from 'utils/user_agent';
+
+export function canUploadFiles() {
+    if (window.mm_config.EnableFileAttachments === 'false') {
+        return false;
+    }
+
+    if (UserAgent.isMobileApp() && window.mm_license.IsLicensed === 'true' && window.mm_license.Compliance === 'true') {
+        return window.mm_config.EnableMobileFileUpload !== 'false';
+    }
+
+    return true;
+}
+
+export function canDownloadFiles() {
+    if (UserAgent.isMobileApp() && window.mm_license.IsLicensed === 'true' && window.mm_license.Compliance === 'true') {
+        return window.mm_config.EnableMobileFileDownload !== 'false';
+    }
+
+    return true;
+}