Added error checking for post calls

src/main/java/ch/progetto152/services/LocationService.java

@@ -2,6 +2,7 @@ package ch.progetto152.services;
 
 import ch.progetto152.entity.LocationEntity;
 import ch.progetto152.repository.LocationRepository;
+import ch.progetto152.utility.ErrorChecking;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
@@ -10,6 +11,7 @@ import java.util.List;
 @Service
 public class LocationService {
 
+    private ErrorChecking errorChecking = new ErrorChecking();
     private final LocationRepository locationRepository;
 
     @Autowired
@@ -30,7 +32,11 @@ public class LocationService {
     }
 
     public LocationEntity createLocation(LocationEntity Location) {
-        return locationRepository.save(Location);
+        if(errorChecking.checkLocation(Location)) {
+            return locationRepository.save(Location);
+        } else {
+            return null;
+        }
     }
 
     public LocationEntity updateLocation(Long id, LocationEntity Location) {

src/main/java/ch/progetto152/services/UserService.java

@@ -3,6 +3,7 @@ package ch.progetto152.services;
 
 import ch.progetto152.entity.UserEntity;
 import ch.progetto152.repository.UserRepository;
+import ch.progetto152.utility.ErrorChecking;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
@@ -11,6 +12,7 @@ import java.util.List;
 @Service
 public class UserService {
 
+    ErrorChecking errorChecking = new ErrorChecking();
     private final UserRepository userRepository;
 
     @Autowired
@@ -35,7 +37,11 @@ public class UserService {
     }
 
     public UserEntity createUser(UserEntity user) {
-        return userRepository.save(user);
+        if(errorChecking.checkUser(user)) {
+            return userRepository.save(user);
+        } else {
+            return null;
+        }
     }
 
     public UserEntity updateUser(Long id, UserEntity user) {

src/main/java/ch/progetto152/services/WaypointService.java

@@ -2,6 +2,7 @@ package ch.progetto152.services;
 
 import ch.progetto152.entity.WaypointsEntity;
 import ch.progetto152.repository.WaypointRepository;
+import ch.progetto152.utility.ErrorChecking;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
@@ -9,6 +10,8 @@ import java.util.List;
 
 @Service
 public class WaypointService {
+
+    ErrorChecking errorChecking = new ErrorChecking();
     private final WaypointRepository waypointRepository;
 
     @Autowired
@@ -29,7 +32,10 @@ public class WaypointService {
     }
 
     public WaypointsEntity createWaypoint(WaypointsEntity waypoint) {
-        return waypointRepository.save(waypoint);
+        if (errorChecking.checkWaypoint(waypoint)) {
+            return waypointRepository.save(waypoint);
+        }
+        return null;
     }
 
     public WaypointsEntity updateWaypoint(Long id, WaypointsEntity waypoint) {

src/main/java/ch/progetto152/services/WaypointVisitedService.java

@@ -2,6 +2,7 @@ package ch.progetto152.services;
 
 import ch.progetto152.entity.WaypointsVisitedEntity;
 import ch.progetto152.repository.WaypointVisitedRepository;
+import ch.progetto152.utility.ErrorChecking;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
@@ -9,6 +10,8 @@ import java.util.List;
 
 @Service
 public class WaypointVisitedService {
+
+    ErrorChecking errorChecking = new ErrorChecking();
     private final WaypointVisitedRepository waypointVisitedRepository;
 
     @Autowired
@@ -33,7 +36,10 @@ public class WaypointVisitedService {
     }
 
     public WaypointsVisitedEntity createWaypoint(WaypointsVisitedEntity waypoint) {
-        return waypointVisitedRepository.save(waypoint);
+        if (errorChecking.checkWaypointVisited(waypoint)) {
+            return waypointVisitedRepository.save(waypoint);
+        }
+        return null;
     }
 
     public WaypointsVisitedEntity updateWaypoint(Long id, WaypointsVisitedEntity waypoint) {