OO-4868: enhance the XML listing with all available tasks files

src/main/java/org/olat/course/nodes/gta/manager/GTAManagerImpl.java

@@ -188,6 +188,22 @@ public class GTAManagerImpl implements GTAManager {
 			if(taskDefinitionsList != null && taskDefinitionsList.getTasks() != null) {
 				taskDefinitions.addAll(taskDefinitionsList.getTasks());
 			}
+			
+			File tasksFolder = getTasksDirectory(courseEnv, cNode);
+			String[] taskFiles = tasksFolder.list(SystemFilenameFilter.FILES_ONLY);
+			if(taskFiles != null) {
+				for(String taskFile:taskFiles) {
+					boolean found = false;
+					for(TaskDefinition taskDefinition:taskDefinitions) {
+						if(taskFile.equalsIgnoreCase(taskDefinition.getFilename())) {
+							found = true;
+						}
+					}
+					if(!found) {
+						taskDefinitions.add(TaskDefinition.fromFile(taskFile));
+					}
+				}
+			}
 		} else {
 			syncWithTaskList(courseEnv, cNode, () -> {
 				ModuleConfiguration config = cNode.getModuleConfiguration();

src/main/java/org/olat/course/nodes/gta/model/TaskDefinition.java

@@ -35,6 +35,17 @@ public class TaskDefinition implements Serializable {
 	private String description;
 	private String filename;
 	
+	public TaskDefinition() {
+		//
+	}
+	
+	public static TaskDefinition fromFile(String filename) {
+		TaskDefinition def = new TaskDefinition();
+		def.setFilename(filename);
+		def.setTitle(filename);
+		return def;
+	}
+	
 	public String getTitle() {
 		return title;
 	}