add 2 new Queries and 2 Methods for UserService

src/main/java/mops/gruppen2/repository/EventRepository.java

@@ -1,9 +1,18 @@
 package mops.gruppen2.repository;
 
 import mops.gruppen2.domain.EventDTO;
+import org.springframework.data.jdbc.repository.query.Query;
 import org.springframework.data.repository.CrudRepository;
+import org.springframework.data.repository.query.Param;
 import org.springframework.stereotype.Repository;
 
+import java.util.List;
+
 @Repository
 public interface EventRepository extends CrudRepository<EventDTO, Long> {
+    @Query("select distinct group_id where user_id =:id")
+    List<Long> findGroup_idsWhereUser_id(@Param("id") Long user_id);
+
+    @Query("select * where group_id =:id")
+    List<EventDTO> findEventDTOByGroup_id(@Param("id") Long group_id);
 }

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

@@ -1,12 +1,13 @@
 package mops.gruppen2.service;
 
-import lombok.EqualsAndHashCode;
+import mops.gruppen2.domain.EventDTO;
 import mops.gruppen2.domain.Exceptions.EventException;
 import mops.gruppen2.domain.Exceptions.GroupDoesNotExistException;
 import mops.gruppen2.domain.Group;
 import mops.gruppen2.domain.event.CreateGroupEvent;
 import mops.gruppen2.domain.event.DeleteGroupEvent;
 import mops.gruppen2.domain.event.Event;
+import mops.gruppen2.repository.EventRepository;
 import org.springframework.stereotype.Service;
 
 import java.util.ArrayList;
@@ -18,9 +19,20 @@ import java.util.Map;
 public class GroupService {
 
     private final EventService eventService;
+    private final EventRepository eventRepository;
 
-    public GroupService(EventService eventService) {
+    public GroupService(EventService eventService, EventRepository eventRepository) {
         this.eventService = eventService;
+        this.eventRepository = eventRepository;
+    }
+
+    public List<Event> getGroupEvents(List<Long> group_ids) {
+        List<EventDTO> eventDTOS = new ArrayList<>();
+        List<Event> events = new ArrayList<>();
+        for (Long group_id: group_ids) {
+            eventDTOS.addAll(eventRepository.findEventDTOByGroup_id(group_id));
+        }
+        return null;
     }
 
     public List<Group> projectEventList(Map<Long, Group> groupMap, List<Event> events) throws EventException {

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

@@ -0,0 +1,25 @@
+package mops.gruppen2.service;
+
+import mops.gruppen2.domain.EventDTO;
+import mops.gruppen2.repository.EventRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+import java.util.Optional;
+
+@Service
+public class UserService {
+
+    final EventRepository eventRepository;
+
+    public UserService(EventRepository eventRepository) {
+        this.eventRepository = eventRepository;
+    }
+
+    public List<Long> getUserGroups(Long user_id) {
+        List<Long> group_ids = eventRepository.findGroup_idsWhereUser_id(user_id);
+
+        return null;
+    }
+}