for processing#989, files cannot be renamed to empty string

Author: raclim

client/modules/IDE/components/FileNode.jsx

@@ -67,6 +67,7 @@ export class FileNode extends React.Component {
   validateFileName() {
     const oldFileExtension = this.originalFileName.match(/\.[0-9a-z]+$/i);
     const newFileExtension = this.props.name.match(/\.[0-9a-z]+$/i);
+    const newFileName = this.props.name;
     if (oldFileExtension && !newFileExtension) {
       this.props.updateFileName(this.props.id, this.originalFileName);
     }
@@ -77,6 +78,12 @@ export class FileNode extends React.Component {
     ) {
       this.props.updateFileName(this.props.id, this.originalFileName);
     }
+    if (newFileName === '') {
+      this.props.updateFileName(this.props.id, this.originalFileName);
+    }
+    if (newFileName === newFileExtension[0]) {
+      this.props.updateFileName(this.props.id, this.originalFileName);
+    }
   }
 
   toggleFileOptions(e) {