Merge remote-tracking branch 'origin/event-db'

# Conflicts:
#	src/main/java/mops/gruppen2/domain/Aggregate.java
#	src/main/java/mops/gruppen2/service/GroupService.java
#	src/test/java/mops/gruppen2/domain/GroupTest.java

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

@@ -0,0 +1,51 @@
+package mops.gruppen2.service;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import mops.gruppen2.domain.EventDTO;
+import mops.gruppen2.domain.event.Event;
+import mops.gruppen2.repository.EventRepository;
+import org.springframework.stereotype.Service;
+
+@Service
+public class EventService {
+    private final SerializationService serializationService;
+    private final EventRepository eventStore;
+
+    public EventService(SerializationService serializationService, EventRepository eventStore) {
+        this.serializationService = serializationService;
+        this.eventStore = eventStore;
+    }
+
+
+    public void saveEvent(Event event){
+        EventDTO eventDTO = getDTO(event);
+        eventStore.save(eventDTO);
+
+    }
+
+    public EventDTO getDTO(Event event){
+        EventDTO eventDTO = new EventDTO();
+        eventDTO.setGroup_id(event.getGroup_id());
+        eventDTO.setUser_id(event.getUser_id());
+        try {
+            eventDTO.setEvent_payload(serializationService.serializeEvent(event));
+        } catch (JsonProcessingException e) {
+            e.printStackTrace();
+        }
+        return  eventDTO;
+    }
+
+    public Long checkGroup() {
+        Long tmpId = 1L;
+        Iterable<EventDTO> eventDTOS = eventStore.findAll();
+        for (EventDTO event : eventDTOS) {
+            if (event.getGroup_id() == null) {
+                return tmpId;
+            }
+            if (tmpId <= event.getGroup_id()) {
+                tmpId++;
+            }
+        }
+        return tmpId;
+    }
+}

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

@@ -13,7 +13,6 @@ public class GroupService {
     /**
      * Konstruiert eine vollständige Gruppe aus Events, welche dieselbe Gruppe betreffen.
      *
-     * @param event Initiales CreateGroup-Event
      * @param eventList Die restlichen Events für diese Gruppe
      * @return Gruppe auf aktuellem Stand
      */

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

@@ -1,5 +1,12 @@
 package mops.gruppen2.service;
 
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import mops.gruppen2.domain.EventDTO;
+import mops.gruppen2.domain.event.Event;
+import mops.gruppen2.repository.EventRepository;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.stereotype.Service;
 
 /**
@@ -7,4 +14,21 @@ import org.springframework.stereotype.Service;
  */
 @Service
 public class SerializationService {
+
+    private final EventRepository eventStore;
+    private final Logger log = LoggerFactory.getLogger(SerializationService.class);
+
+    public SerializationService(EventRepository eventStore) {
+        this.eventStore = eventStore;
+    }
+
+    public String serializeEvent(Event event) throws JsonProcessingException {
+        ObjectMapper mapper = new ObjectMapper();
+        return mapper.writeValueAsString(event);
+    }
+  
+    public Event deserializeEvent(String json) throws JsonProcessingException {
+        ObjectMapper mapper = new ObjectMapper();
+        return mapper.readValue(json, Event.class);
+    }
 }