Disable the generate button if the ID field is empty

CHANGELOG.md

@@ -94,8 +94,10 @@ Note that this project **does not** adhere to [Semantic Versioning](http://semve
 - We fixed an issue where an exception was thrown when adding a save action without a selected formatter in the library properties [#6069](https://github.com/JabRef/jabref/issues/6069)
 - We fixed an issue where JabRef's icon was missing in the Export to clipboard Dialog. [#6286](https://github.com/JabRef/jabref/issues/6286)
 - We fixed an issue when an "Abstract field" was duplicating text, when importing from RIS file (Neurons) [#6065](https://github.com/JabRef/jabref/issues/6065)
+- We fixed an issue where adding the addition of a new entry was not completely validated [#6370](https://github.com/JabRef/jabref/issues/6370)
 - We fixed an issue where the blue and red text colors in the Merge entries dialog were not quite visible [#6334](https://github.com/JabRef/jabref/issues/6334)
 
+
 ### Removed
 
 - Ampersands are no longer escaped by default in the `bib` file. If you want to keep the current behaviour, you can use the new "Escape Ampersands" formatter as a save action. [#5869](https://github.com/JabRef/jabref/issues/5869)

src/main/java/org/jabref/gui/EntryTypeView.java

@@ -19,6 +19,7 @@
 import org.jabref.Globals;
 import org.jabref.gui.util.BaseDialog;
 import org.jabref.gui.util.ControlHelper;
+import org.jabref.gui.util.IconValidationDecorator;
 import org.jabref.gui.util.ViewModelListCellFactory;
 import org.jabref.logic.importer.IdBasedFetcher;
 import org.jabref.logic.l10n.Localization;
@@ -33,6 +34,7 @@
 import org.jabref.preferences.JabRefPreferences;
 
 import com.airhacks.afterburner.views.ViewLoader;
+import de.saxsys.mvvmfx.utils.validation.visualization.ControlsFxVisualizer;
 import org.fxmisc.easybind.EasyBind;
 
 /**
@@ -59,6 +61,7 @@ public class EntryTypeView extends BaseDialog<EntryType> {
 
     private EntryType type;
     private EntryTypeViewModel viewModel;
+    private final ControlsFxVisualizer visualizer = new ControlsFxVisualizer();
 
     public EntryTypeView(BasePanel basePanel, DialogService dialogService, JabRefPreferences preferences) {
         this.basePanel = basePanel;
@@ -80,7 +83,7 @@ public EntryTypeView(BasePanel basePanel, DialogService dialogService, JabRefPre
         Button btnGenerate = (Button) this.getDialogPane().lookupButton(generateButton);
 
         btnGenerate.textProperty().bind(EasyBind.map(viewModel.searchingProperty(), searching -> (searching) ? Localization.lang("Searching...") : Localization.lang("Generate")));
-        btnGenerate.disableProperty().bind(viewModel.searchingProperty());
+        btnGenerate.disableProperty().bind(viewModel.idFieldValidationStatus().validProperty().not().or(viewModel.searchingProperty()));
 
         EasyBind.subscribe(viewModel.searchSuccesfulProperty(), value -> {
             if (value) {
@@ -112,6 +115,7 @@ private void addEntriesToPane(FlowPane pane, Collection<? extends BibEntryType>
 
     @FXML
     public void initialize() {
+        visualizer.setDecoration(new IconValidationDecorator());
         viewModel = new EntryTypeViewModel(prefs, basePanel, dialogService);
 
         idBasedFetchers.itemsProperty().bind(viewModel.fetcherItemsProperty());
@@ -160,7 +164,10 @@ public void initialize() {
             }
         }
 
-        Platform.runLater(() -> idTextField.requestFocus());
+        Platform.runLater(() -> {
+            idTextField.requestFocus();
+            visualizer.initVisualization(viewModel.idFieldValidationStatus(), idTextField, true);
+        });
     }
 
     public EntryType getChoice() {

src/main/java/org/jabref/gui/EntryTypeViewModel.java

@@ -1,6 +1,7 @@
 package org.jabref.gui;
 
 import java.util.Optional;
+import java.util.function.Predicate;
 
 import javafx.beans.property.BooleanProperty;
 import javafx.beans.property.ListProperty;
@@ -27,6 +28,10 @@
 import org.jabref.model.strings.StringUtil;
 import org.jabref.preferences.JabRefPreferences;
 
+import de.saxsys.mvvmfx.utils.validation.FunctionBasedValidator;
+import de.saxsys.mvvmfx.utils.validation.ValidationMessage;
+import de.saxsys.mvvmfx.utils.validation.ValidationStatus;
+import de.saxsys.mvvmfx.utils.validation.Validator;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -44,6 +49,7 @@ public class EntryTypeViewModel {
     private Task<Optional<BibEntry>> fetcherWorker = new FetcherWorker();
     private final BasePanel basePanel;
     private final DialogService dialogService;
+    private final Validator idFieldValidator;
 
     public EntryTypeViewModel(JabRefPreferences preferences, BasePanel basePanel, DialogService dialogService) {
         this.basePanel = basePanel;
@@ -52,6 +58,9 @@ public EntryTypeViewModel(JabRefPreferences preferences, BasePanel basePanel, Di
         fetchers.addAll(WebFetchers.getIdBasedFetchers(preferences.getImportFormatPreferences()));
         selectedItemProperty.setValue(getLastSelectedFetcher());
 
+        Predicate<String> notEmpty = input -> (input != null) && !input.trim().isEmpty();
+        idFieldValidator = new FunctionBasedValidator<>(idText, notEmpty, ValidationMessage.error(Localization.lang("Required field \"%0\" is empty.", Localization.lang("ID"))));
+
     }
 
     public BooleanProperty searchSuccesfulProperty() {
@@ -66,6 +75,8 @@ public ObjectProperty<IdBasedFetcher> selectedItemProperty() {
         return selectedItemProperty;
     }
 
+    public ValidationStatus idFieldValidationStatus() { return idFieldValidator.getValidationStatus(); }
+
     public StringProperty idTextProperty() {
         return idText;
     }