Created first Api implementation

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

@@ -1,14 +1,18 @@
 package mops.gruppen2.repository;
 
 import mops.gruppen2.domain.EventDTO;
-import mops.gruppen2.domain.event.Event;
 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 * FROM event WHERE event_id > ?#{[0]}")
+    @Query("SELECT * FROM event WHERE event_id > @status")
     public Iterable<EventDTO> findNewEventSinceStatus(@Param("status") Long status);
+
+    @Query("SELECT * FROM event WHERE group_id IN @groupIds ")
+    public Iterable<EventDTO> findAllEventsOfGroups(@Param("groupIds") List<Long> groupIds);
 }

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

@@ -55,9 +55,11 @@ public class EventService {
 
 
     public List<Event> getNewEvents(Long status){
-        Iterable<EventDTO> eventDTOS = eventStore.findNewEventSinceStatus(status);
+        Iterable<EventDTO> newEventDTOS = eventStore.findNewEventSinceStatus(status);
+        List<Long> groupIdsThatChanged = this.getAllGroupIds(newEventDTOS);
 
-        return translateEventDTOs(eventDTOS);
+        Iterable<EventDTO> groupEventDTOS = eventStore.findAllEventsOfGroups(groupIdsThatChanged);
+        return translateEventDTOs(groupEventDTOS);
     }
 
     private List<Event> translateEventDTOs(Iterable<EventDTO> eventDTOS){
@@ -74,4 +76,15 @@ public class EventService {
         return events;
     }
 
+    private List<Long> getAllGroupIds(Iterable<EventDTO> eventDTOS){
+        List<Long> idsOfChangedGroups = new ArrayList<>();
+        for (EventDTO eventDTO : eventDTOS){
+            if (!idsOfChangedGroups.contains(eventDTO.getGroup_id())) {
+                idsOfChangedGroups.add(eventDTO.getGroup_id());
+
+            }
+        }
+        return idsOfChangedGroups;
+    }
+
 }

src/test/java/mops/gruppen2/service/EventServiceTest.java

@@ -10,6 +10,7 @@ import org.junit.jupiter.api.Test;
 import java.util.ArrayList;
 import java.util.List;
 
+import static org.assertj.core.api.Assertions.assertThat;
 import static org.junit.jupiter.api.Assertions.*;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.when;
@@ -37,4 +38,26 @@ class EventServiceTest {
         when(eventRepositoryMock.findAll()).thenReturn(eventDTOS);
         assertEquals(eventDTO1.getGroup_id()+1, eventService.checkGroup());
     }
+
+    @Test
+    void checkGetAllGroupIdsWithRepeadedId(){
+        ArrayList<EventDTO> eventDTOS = new ArrayList<>();
+
+        EventDTO eventDTO1 = new EventDTO();
+        eventDTO1.setGroup_id(1L);
+        eventDTOS.add(eventDTO1);
+
+        EventDTO eventDTO2 = new EventDTO();
+        eventDTO2.setGroup_id(2L);
+        eventDTOS.add(eventDTO2);
+
+        EventDTO eventDTO3 = new EventDTO();
+        eventDTO3.setGroup_id(1L);
+        eventDTOS.add(eventDTO3);
+
+        List<Long> groupIds = eventService.getAllGroupIds(eventDTOS);
+
+        assertThat(groupIds.size()).isEqualTo(2);
+
+    }
 }