refactoring Events for better journal

Signed-off-by: Stephan Richter <s.richter@srsoftware.de>

core/src/main/java/de/srsoftware/umbrella/core/model/Task.java

@@ -27,7 +27,7 @@ public class Task implements Mappable {
 	private boolean noIndex, showClosed;
 	private final Map<Long, Member> members;
 	private final Set<String> dirtyFields = new HashSet<>();
-
+	private final Set<String> tags = new HashSet<>();
 
 	public Task (long id, long projectId, Long parentTaskId, String name, String description, int status, Double estimatedTime, LocalDate start, LocalDate dueDate, boolean showClosed, boolean noIndex, Map<Long,Member> members, int priority){
 		this.id = id;
@@ -218,6 +218,16 @@ public class Task implements Mappable {
 		return status;
 	}
 
+	public Task tags(Collection<String> newValue){
+		tags.clear();
+		tags.addAll(newValue);
+		return this;
+	}
+
+	public Set<String> tags(){
+		return tags;
+	}
+
 	@Override
 	public Map<String, Object> toMap() {
 		var map = new HashMap<String,Object>();
@@ -240,7 +250,7 @@ public class Task implements Mappable {
 		map.put(REQUIRED_TASKS_IDS,requiredTasksIds);
 		map.put(SHOW_CLOSED,showClosed);
 		map.put(TOTAL_PRIO,totalPrio());
-
+		map.put(TAGS,tags);
 		return map;
 	}