add badges in group lists

Co-authored-by: [Mahgs] <maxoerter@gmx.de>
Co-authored-by: Christoph <tobi@urpost.de>

src/main/java/mops/gruppen2/service/GroupService.java

@@ -11,6 +11,7 @@ import mops.gruppen2.security.Account;
 import org.springframework.stereotype.Service;
 
 import java.util.ArrayList;
+import java.util.Comparator;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -84,6 +85,8 @@ public class GroupService {
 
         List<Group> visibleGroups = projectEventList(groupEvents);
 
+        sortByGroupType(visibleGroups);
+
         return visibleGroups.parallelStream()
                             .filter(group -> group.getType() != null)
                             .filter(group -> !eventService.userInGroup(group.getId(), userId))
@@ -132,4 +135,20 @@ public class GroupService {
                                         group.getDescription().toLowerCase().contains(search.toLowerCase()))
                 .collect(Collectors.toList());
     }
+
+    public void sortByGroupType(List<Group> groups) {
+        groups.sort(new Comparator<Group>() {
+            @Override
+            public int compare(Group g1, Group g2) {
+                if (g1.getType() == GroupType.LECTURE) {
+                    return -1;
+                }
+                if (g2.getType() == GroupType.LECTURE) {
+                    return 0;
+                }
+
+                return 1;
+            }
+        });
+    }
 }

src/main/java/mops/gruppen2/service/UserService.java

@@ -35,6 +35,9 @@ public class UserService {
                 newGroups.add(group);
             }
         }
+
+        groupService.sortByGroupType(newGroups);
+
         return newGroups;
     }