Resolve "removing creator of project might remove project background in projects created by user"

Closes #1527 (closed)

rest-api/src/main/java/lcsb/mapviewer/api/users/UserRestImpl.java

 package lcsb.mapviewer.api.users;
 
 import java.io.IOException;
-import java.util.*;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Set;
+import java.util.TreeMap;
 
 import javax.mail.MessagingException;
 
@@ -17,17 +27,33 @@ import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 import org.springframework.util.MultiValueMap;
 
-import lcsb.mapviewer.api.*;
+import lcsb.mapviewer.api.BaseRestImpl;
+import lcsb.mapviewer.api.OperationNotAllowedException;
+import lcsb.mapviewer.api.UpdateConflictException;
 import lcsb.mapviewer.common.Configuration;
 import lcsb.mapviewer.common.exception.InvalidArgumentException;
 import lcsb.mapviewer.common.exception.InvalidStateException;
 import lcsb.mapviewer.model.map.MiriamType;
-import lcsb.mapviewer.model.map.layout.ProjectBackground;
 import lcsb.mapviewer.model.security.Privilege;
 import lcsb.mapviewer.model.security.PrivilegeType;
-import lcsb.mapviewer.model.user.*;
-import lcsb.mapviewer.model.user.annotator.*;
-import lcsb.mapviewer.services.*;
+import lcsb.mapviewer.model.user.AnnotatorParamDefinition;
+import lcsb.mapviewer.model.user.ConfigurationElementType;
+import lcsb.mapviewer.model.user.User;
+import lcsb.mapviewer.model.user.UserAnnotationSchema;
+import lcsb.mapviewer.model.user.UserClassAnnotators;
+import lcsb.mapviewer.model.user.UserClassRequiredAnnotations;
+import lcsb.mapviewer.model.user.UserClassValidAnnotations;
+import lcsb.mapviewer.model.user.UserGuiPreference;
+import lcsb.mapviewer.model.user.annotator.AnnotatorConfigParameter;
+import lcsb.mapviewer.model.user.annotator.AnnotatorData;
+import lcsb.mapviewer.model.user.annotator.AnnotatorInputParameter;
+import lcsb.mapviewer.model.user.annotator.AnnotatorOutputParameter;
+import lcsb.mapviewer.model.user.annotator.AnnotatorParameter;
+import lcsb.mapviewer.model.user.annotator.BioEntityField;
+import lcsb.mapviewer.services.InvalidTokenException;
+import lcsb.mapviewer.services.ObjectExistsException;
+import lcsb.mapviewer.services.ObjectNotFoundException;
+import lcsb.mapviewer.services.QueryException;
 import lcsb.mapviewer.services.interfaces.IProjectBackgroundService;
 import lcsb.mapviewer.services.utils.EmailSender;
 
@@ -98,58 +124,58 @@ public class UserRestImpl extends BaseRestImpl {
       String column = string.toLowerCase();
       Object value;
       switch (column) {
-      case "id":
-      case "idobject":
-        value = user.getId();
-        break;
-      case "name":
-        value = user.getName();
-        break;
-      case "surname":
-        value = user.getSurname();
-        break;
-      case "login":
-        value = user.getLogin();
-        break;
-      case "email":
-        value = user.getEmail();
-        break;
-      case "mincolor":
-        value = user.getMinColor();
-        break;
-      case "maxcolor":
-        value = user.getMaxColor();
-        break;
-      case "neutralcolor":
-        value = user.getNeutralColor();
-        break;
-      case "simplecolor":
-        value = user.getSimpleColor();
-        break;
-      case "removed":
-        value = user.isRemoved();
-        break;
-      case "termsofuseconsent":
-        value = user.isTermsOfUseConsent();
-        break;
-      case "connectedtoldap":
-        value = user.isConnectedToLdap();
-        break;
-      case "ldapaccountavailable":
-        if (ldapAvailable == null) {
-          ldapAvailable = false;
-        }
-        value = ldapAvailable;
-        break;
-      case "privileges":
-        value = preparePrivileges(user);
-        break;
-      case "preferences":
-        value = preparePreferences(user);
-        break;
-      default:
-        value = "Unknown column";
-        break;
+        case "id":
+        case "idobject":
+          value = user.getId();
+          break;
+        case "name":
+          value = user.getName();
+          break;
+        case "surname":
+          value = user.getSurname();
+          break;
+        case "login":
+          value = user.getLogin();
+          break;
+        case "email":
+          value = user.getEmail();
+          break;
+        case "mincolor":
+          value = user.getMinColor();
+          break;
+        case "maxcolor":
+          value = user.getMaxColor();
+          break;
+        case "neutralcolor":
+          value = user.getNeutralColor();
+          break;
+        case "simplecolor":
+          value = user.getSimpleColor();
+          break;
+        case "removed":
+          value = user.isRemoved();
+          break;
+        case "termsofuseconsent":
+          value = user.isTermsOfUseConsent();
+          break;
+        case "connectedtoldap":
+          value = user.isConnectedToLdap();
+          break;
+        case "ldapaccountavailable":
+          if (ldapAvailable == null) {
+            ldapAvailable = false;
+          }
+          value = ldapAvailable;
+          break;
+        case "privileges":
+          value = preparePrivileges(user);
+          break;
+        case "preferences":
+          value = preparePreferences(user);
+          break;
+        default:
+          value = "Unknown column";
+          break;
       }
       result.put(string, value);
     }
@@ -750,10 +776,6 @@ public class UserRestImpl extends BaseRestImpl {
     } else if (user.getLogin().equals(Configuration.ANONYMOUS_LOGIN)) {
       throw new OperationNotAllowedException("guest account cannot be removed");
     }
-    List<ProjectBackground> backgrounds = projectBackgroundService.getProjectBackgroundsByUser(user);
-    for (ProjectBackground background : backgrounds) {
-      projectBackgroundService.removeProjectBackground(background, null);
-    }
     getUserService().deleteUser(user);
     return okStatus();
   }