US01: Make it possible for the user to add a horse through the web UI, add additional validations

backend/src/main/java/at/ac/tuwien/sepm/assignment/individual/service/impl/SimpleHorseService.java

@@ -12,6 +12,7 @@ import org.springframework.dao.DataAccessException;
 import org.springframework.stereotype.Service;
 
 import java.lang.invoke.MethodHandles;
+import java.text.SimpleDateFormat;
 
 @Service
 public class SimpleHorseService implements HorseService {
@@ -33,8 +34,8 @@ public class SimpleHorseService implements HorseService {
 
     @Override
     public Horse addHorse(Horse horse) throws ValidationException, DataAccessException {
-        LOGGER.trace("addHorse({})", horse.toString());
         this.validator.validateNewHorse(horse);
+        LOGGER.trace("addHorse({})", horse.toString());
         return horseDao.addHorse(horse);
     }
 }

backend/src/main/java/at/ac/tuwien/sepm/assignment/individual/util/Validator.java

@@ -16,6 +16,9 @@ public class Validator {
     }
 
     public void validateNewHorse(Horse horse) throws ValidationException {
+        if(horse.getName() == null || horse.getScore() == 0 || horse.getBirthday() == null || horse.getDescription() == null){
+            throw new ValidationException("All or some required values missing: name, description, score, birthday");
+        }
         if(horse.getScore() > 5 || horse.getScore() < 1) {
             throw new ValidationException("Score value " + horse.getScore() + " not allowed. The score must be an integer between 1 and 5");
         }