Add/Edit Room: Preferences

- do not allow for Required preference (for a department) unless there is already a required department for the room
  - required preference set directly on a room usually makes no or very little sense and usually only creates confusion when a room is accidentally marked as required (as no other rooms can be used for the department by the course timetabling solver)

JavaSource/org/unitime/timetable/gwt/client/rooms/RoomEdit.java

@@ -885,8 +885,10 @@ else if (!type.isRoom() && iRoom.getBuilding() == null)
 			for (Map.Entry<Long, CheckBox> e: iServices.entrySet())
 				e.getValue().setValue(false);
 			if (iRoom.hasServices())
-				for (EventServiceProviderInterface service: iRoom.getServices())
-					iServices.get(service.getId()).setValue(true);
+				for (EventServiceProviderInterface service: iRoom.getServices()) {
+					CheckBox ch = iServices.get(service.getId());
+					if (ch != null) ch.setValue(true);
+				}
 			if (iProperties.hasEventServiceProviders()) {
 				Long deptId = Long.valueOf(iEventDepartment.getValue(iEventDepartment.getSelectedIndex()));
 				for (EventServiceProviderInterface service: iProperties.getEventServiceProviders()) {

JavaSource/org/unitime/timetable/server/rooms/RoomPropertiesBackend.java

@@ -84,6 +84,7 @@ public RoomPropertiesInterface execute(RoomPropertiesRequest request, SessionCon
 			Session session = SessionDAO.getInstance().get(request.hasSessionId() ? request.getSessionId() : context.getUser().getCurrentAcademicSessionId());
 			response.setAcademicSession(new AcademicSessionInterface(session.getUniqueId(), session.getAcademicTerm() + " " + session.getAcademicYear()));
 			authority = context.getUser().getCurrentAuthority();
+			if (!request.hasSessionId()) request.setSessionId(session.getUniqueId());
 		}
 
 		response.setCanEditDepartments(context.hasPermission(Right.EditRoomDepartments));

JavaSource/org/unitime/timetable/server/rooms/RoomSharingBackend.java

@@ -121,9 +121,18 @@ public RoomSharingModel loadRoomSharing(Location location, boolean includeRoomPr
 		model.setNoteEditable(editable);
 
 		if (includeRoomPreferences) {
+			boolean hasReq = false;
+			if (location != null && location.getRoomDepts() != null)
+				for (RoomDept rd: location.getRoomDepts())
+					if (rd.getPreference() != null && PreferenceLevel.sRequired.equals(rd.getPreference().getPrefProlog())) {
+						hasReq = true;
+						break;
+					}
 			boolean prefEditable = (location == null ? context.getUser().getCurrentAuthority().hasRight(Right.RoomEditPreference) : context.hasPermission(location, Right.RoomEditPreference));
-			for (PreferenceLevel pref: PreferenceLevel.getPreferenceLevelList(false))
-				model.addPreference(new PreferenceInterface(pref.getUniqueId(), PreferenceLevel.prolog2bgColor(pref.getPrefProlog()), pref.getPrefProlog(), pref.getPrefName(), pref.getAbbreviation(), prefEditable));
+			for (PreferenceLevel pref: PreferenceLevel.getPreferenceLevelList(false)) {
+				if (hasReq || !PreferenceLevel.sRequired.equals(pref.getPrefProlog()))
+					model.addPreference(new PreferenceInterface(pref.getUniqueId(), PreferenceLevel.prolog2bgColor(pref.getPrefProlog()), pref.getPrefProlog(), pref.getPrefName(), pref.getAbbreviation(), prefEditable));
+			}
 		}
 
 		boolean deptIndependent = context.getUser().getCurrentAuthority().hasRight(Right.DepartmentIndependent);

WebContent/help/Release-Notes.xml

@@ -36,6 +36,14 @@
 				<line>Date Pattern: Corrected the name of the default date pattern when a date pattern is set on the scheduling subpart.</line>
 			</description>
 		</item>
+		<item>
+			<name>Add/Edit Room</name>
+			<description>
+				<line>Preference: Do not allow for Required preference (for a department) unless there is already a required department for the room.
+					<line>Required preference set directly on a room usually makes no or very little sense and usually only creates confusion when a room is accidentally marked as required (as no other rooms can be used for the department by the course timetabling solver).</line>
+				</line>
+			</description>
+		</item>
 	</category>
 	<category>
 		<title>Student Scheduling</title>