OO-2753 include info message when catalog entries are available

src/main/java/org/olat/repository/_i18n/LocalStrings_de.properties

@@ -373,6 +373,7 @@ new.wiki=Wiki erstellen
 new.wiki.intro=Neues Wiki erstellen
 no.lifecycle=Keine Einschr\u00E4nkung
 no.catalog.entries=Diese Resource wurde noch nicht im Katalog registriert. \r\n\r\n Verwenden Sie den "In Katalog einf\u00FCgen" Button in der Toolbar, um die Resource auf einer bestimmten Katalog-Ebenen hinzuzuf\u00FCgen. Der Katalog erlaubt es dem Benutzer je nach Zugriffskonfiguration nach bestimmten Eintr\u00E4gen zu suchen. Sie k\u00F6nnen die Resource auf mehreren Katalog-Ebenen hinzuf\u00FCgen.
+info.catalog.entries=Verwenden Sie den "In Katalog einf\u00FCgen" Button in der Toolbar, um die Resource auf einer bestimmten Katalog-Ebenen hinzuzuf\u00FCgen. Der Katalog erlaubt es dem Benutzer je nach Zugriffskonfiguration nach bestimmten Eintr\u00E4gen zu suchen. Sie k\u00F6nnen die Resource auf mehreren Katalog-Ebenen hinzuf\u00FCgen.
 nomembers=XXX No members
 notification.mail.added.body=*** Das ist eine automatisch generierte Nachricht. Bitte antworten Sie nicht auf diese Nachricht *** \n\nSie wurden von {0} {1} ({2}) in einen Kurs eingeladen\: \n\nKursname\: $coursename\nBeschreibung\: $coursedescription\n\nBei Fragen kontaktieren Sie bitte {0} {1} ({2}).
 notification.mail.added.subject=Kurs $coursename 

src/main/java/org/olat/repository/_i18n/LocalStrings_en.properties

@@ -369,7 +369,8 @@ new.test.intro=Create new test
 new.wiki=Create wiki
 new.wiki.intro=Create new wiki
 no.lifecycle=No limitation
-no.catalog.entries=This resource has not been added to the catalog yet. \r\n\r\n Use the "Add to catalog" button in the toolbar above to add the resource to a specific level in the catalog. The catalog allows users to browse for available resources depending on th resource access configuration. You can add the resource to multiple catalog levels. 
+no.catalog.entries=This resource has not been added to the catalog yet. \r\n\r\n Use the "Add to catalog" button in the toolbar above to add the resource to a specific level in the catalog. The catalog allows users to browse for available resources depending on th resource access configuration. You can add the resource to multiple catalog levels.
+info.catalog.entries=Use the "Add to catalog" button in the toolbar above to add the resource to a specific level in the catalog. The catalog allows users to browse for available resources depending on th resource access configuration. You can add the resource to multiple catalog levels. 
 nomembers=XXX No members
 notification.mail.added.body=*** This is an automatically generated message. Please do not answer to this message *** \r\n\r\nYou have been added by {0} {1} ({2}) to a course\:\r\n\r\nCourse name\: $coursename\r\nDescription\: $coursedescription\r\n\r\nIf you have questions regarding this action, please contact {0} {1} ({2}).
 notification.mail.added.subject=Course $coursename

src/main/java/org/olat/repository/ui/author/CatalogSettingsController.java

@@ -29,6 +29,7 @@ import org.olat.core.gui.components.form.flexible.FormItemContainer;
 import org.olat.core.gui.components.form.flexible.elements.FlexiTableElement;
 import org.olat.core.gui.components.form.flexible.impl.FormBasicController;
 import org.olat.core.gui.components.form.flexible.impl.FormEvent;
+import org.olat.core.gui.components.form.flexible.impl.FormLayoutContainer;
 import org.olat.core.gui.components.form.flexible.impl.elements.table.DefaultFlexiColumnModel;
 import org.olat.core.gui.components.form.flexible.impl.elements.table.DefaultFlexiTableDataModel;
 import org.olat.core.gui.components.form.flexible.impl.elements.table.FlexiTableColumnModel;
@@ -62,12 +63,14 @@ public class CatalogSettingsController extends FormBasicController {
 	private FlexiTableElement tableEl;
 	private CategoriesListModel model;
 	private TooledStackedPanel stackPanel;
+	private FormLayoutContainer catalog;
 
 	private CloseableModalController cmc;
 	private Controller catalogAdddController;
 	
 	private RepositoryEntry entry;
-	
+	protected String velocity_root;
+
 	@Autowired
 	private CatalogManager catalogManager;
 	
@@ -77,6 +80,7 @@ public class CatalogSettingsController extends FormBasicController {
 		setTranslator(Util.createPackageTranslator(RepositoryService.class, getLocale(), getTranslator()));
 		this.entry = entry;
 		this.stackPanel = stackPanel;
+		this.velocity_root = Util.getPackageVelocityRoot(this.getClass());
 		
 		initForm(ureq);
 		stackPanel.pushController(translate("details.categoriesheader"), this);
@@ -91,6 +95,11 @@ public class CatalogSettingsController extends FormBasicController {
 
 	@Override
 	protected void initForm(FormItemContainer formLayout, Controller listener, UserRequest ureq) {
+		String catalogPage = velocity_root + "/catalog_info.html";
+		catalog = FormLayoutContainer.createCustomFormLayout("info", getTranslator(), catalogPage);
+		catalog.setRootForm(mainForm);
+		formLayout.add(catalog);
+		
 		FlexiTableColumnModel columnsModel = FlexiTableDataModelFactory.createFlexiTableColumnModel();
 		columnsModel.addFlexiColumnModel(new DefaultFlexiColumnModel("catalog.path", 0));
 		columnsModel.addFlexiColumnModel(new DefaultFlexiColumnModel("remove", translate("remove"), "remove"));
@@ -101,7 +110,10 @@ public class CatalogSettingsController extends FormBasicController {
 		tableEl.setCustomizeColumns(false);
 		tableEl.setVisible(true);
 		if (catalogEntries.size() == 0) {
+			catalog.contextPut("hasContent", false);
 			tableEl.setEmtpyTableMessageKey("no.catalog.entries");
+		} else {
+			catalog.contextPut("hasContent", true);
 		}
 	}
 	
@@ -190,6 +202,12 @@ public class CatalogSettingsController extends FormBasicController {
 	private void updateTable() {
 		List<CatalogEntry> catalogEntries = catalogManager.getCatalogCategoriesFor(entry);
 		model.setObjects(catalogEntries);
+		if (catalogEntries.size() == 0) {
+			catalog.contextPut("hasContent", false);
+			tableEl.setEmtpyTableMessageKey("no.catalog.entries");
+		} else {
+			catalog.contextPut("hasContent", true);
+		}
 		tableEl.reset();
 	}
 

src/main/java/org/olat/repository/ui/author/_content/catalog_info.html

+#if ($hasContent)
+<div class="o_info">
+$r.translate("info.catalog.entries")
+</div>
+#end
\ No newline at end of file