require collection name

gui/griffon-app/controllers/com/muwire/gui/CollectionWizardController.groovy

@@ -36,6 +36,11 @@ class CollectionWizardController {
     void review() {
         model.timestamp = System.currentTimeMillis()
         model.root = view.nameTextField.text
+        if (model.root == null || model.root.trim().length() == 0) {
+            view.warnMissingName()
+            return
+        }
+        model.root = model.root.trim()
         model.comment = view.commentTextArea.text
         if (model.comment == null)
             model.comment = ""

gui/griffon-app/i18n/messages.properties

@@ -535,6 +535,8 @@ COLLECTION_DESCRIPTION=Enter description for this collection
 COLLECTION_TOTAL_FILES=Number of files
 COLLECTION_TOTAL_SIZE=Total size
 COLLECTION_REVIEW_TITLE=This is what the collection will look like
+COLLECTION_NAME_WARNING=The collection name cannot be blank.  Please select a name for this collection.
+COLLECTION_NAME_WARNING_TITLE=Missing collection name
 
 ## Collections tool
 COLLECTION_TOOL_TITLE=Collections in your repository

gui/griffon-app/views/com/muwire/gui/CollectionWizardView.groovy

@@ -12,6 +12,7 @@ import griffon.metadata.ArtifactProviderFor
 import net.i2p.data.DataHelper
 
 import javax.swing.JDialog
+import javax.swing.JOptionPane
 import javax.swing.JTree
 import javax.swing.SwingConstants
 import javax.swing.border.TitledBorder
@@ -108,6 +109,11 @@ class CollectionWizardView {
         mainPanel.getLayout().show(mainPanel, "configuration")
     }
     
+    void warnMissingName() {
+        JOptionPane.showMessageDialog(dialog, trans("COLLECTION_NAME_WARNING"), 
+            trans("COLLECTION_NAME_WARNING_TITLE"), JOptionPane.WARNING_MESSAGE)
+    }
+    
     void mvcGroupInit(Map<String,String> args) {
         filesTable.setDefaultRenderer(Long.class, new SizeRenderer())