change AddUserEvent and DeleteUserEvent

src/main/java/mops/gruppen2/domain/event/AddUserEvent.java

@@ -3,6 +3,7 @@ package mops.gruppen2.domain.event;
 import lombok.AllArgsConstructor;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
+import mops.gruppen2.domain.Group;
 import mops.gruppen2.domain.User;
 
 /**
@@ -16,13 +17,6 @@ public class AddUserEvent extends Event {
     String familyname;
     String email;
 
-    public AddUserEvent(Long event_id, Long group_id, String user_id, String givenname, String familyname, String email) {
-        super(event_id, group_id, user_id);
-        this.givenname = givenname;
-        this.familyname = familyname;
-        this.email = email;
-    }
-
     public AddUserEvent(Long group_id, String user_id, String givenname, String familyname, String email) {
         super(group_id, user_id);
         this.givenname = givenname;
@@ -30,10 +24,7 @@ public class AddUserEvent extends Event {
         this.email = email;
     }
 
-    public AddUserEvent(Long event_id, Long group_id, User user) {
-        super(event_id, group_id, user.getUser_id());
-        this.givenname = user.getGivenname();
-        this.familyname = user.getFamilyname();
-        this.email = user.getEmail();
+    public void apply(Group group, User user) {
+        group.getMembers().add(user);
     }
 }

src/main/java/mops/gruppen2/domain/event/DeleteGroupEvent.java

@@ -7,8 +7,8 @@ import lombok.Value;
 @Value
 public class DeleteGroupEvent extends Event {
 
-    public DeleteGroupEvent(long event_id, long group_id, String user_id) {
-        super(event_id, group_id, user_id);
+    public DeleteGroupEvent(long group_id, String user_id) {
+        super(group_id, user_id);
     }
 
 }

src/main/java/mops/gruppen2/domain/event/DeleteUserEvent.java

@@ -1,15 +1,21 @@
 package mops.gruppen2.domain.event;
 
 import lombok.*;
+import mops.gruppen2.domain.Group;
+import mops.gruppen2.domain.User;
 
 /**
  * Entfernt ein einzelnes Mitglied einer Gruppe.
  */
 @Getter
 public class DeleteUserEvent extends Event { 
-    public DeleteUserEvent(Long event_id, Long group_id, String user_id) {
-        super(event_id, group_id, user_id);
+    public DeleteUserEvent(Long group_id, String user_id) {
+        super(group_id, user_id);
     }
 
     public DeleteUserEvent() {}
+
+    public void apply(Group group, User user) {
+        group.getMembers().remove(user);
+    }
 }

src/main/java/mops/gruppen2/domain/event/Event.java

@@ -26,7 +26,6 @@ import lombok.Setter;
 })
 @Setter
 public class Event {
-    Long event_id;
     Long group_id;
     String user_id;