add repository logic. add service logic. it works now

src/main/java/ua/com/dxrkness/model/Freight.java

@@ -1,4 +1,4 @@
 package ua.com.dxrkness.model;
 
-public record Freight() {
+public record Freight(long id) implements Identifiable {
 }

src/main/java/ua/com/dxrkness/model/Identifiable.java

@@ -0,0 +1,5 @@
+package ua.com.dxrkness.model;
+
+public interface Identifiable {
+    long id();
+}

src/main/java/ua/com/dxrkness/model/Route.java

@@ -1,4 +1,6 @@
 package ua.com.dxrkness.model;
 
-public record Route() {
+import java.util.List;
+
+public record Route(long id, Vehicle vehicle, List<Freight> freights) implements Identifiable {
 }

src/main/java/ua/com/dxrkness/model/Vehicle.java

@@ -1,4 +1,4 @@
 package ua.com.dxrkness.model;
 
-public record Vehicle() {
+public record Vehicle(long id) implements Identifiable {
 }

src/main/java/ua/com/dxrkness/repository/CrudRepository.java

@@ -0,0 +1,45 @@
+package ua.com.dxrkness.repository;
+
+import ua.com.dxrkness.model.Identifiable;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+
+abstract class CrudRepository<T extends Identifiable> {
+    protected final List<T> STORAGE = new ArrayList<>();
+
+    public List<T> getAll() {
+        return new ArrayList<>(STORAGE); // defensive copy
+    }
+
+    public Optional<T> getById(long id) {
+        return STORAGE.stream().filter(el -> el.id() == id).findFirst();
+    }
+
+    public T add(T toAdd) {
+        STORAGE.add(toAdd);
+        return toAdd;
+    }
+
+    public T update(long id, T newT) {
+        for (int i = 0; i < STORAGE.size(); i++) {
+            if (STORAGE.get(i).id() == id) {
+                STORAGE.set(i, newT);
+                break;
+            }
+        }
+        return newT;
+    }
+
+    public Optional<T> delete(long id) {
+        T deleted = null;
+        for (int i = 0; i < STORAGE.size(); i++) {
+            if (STORAGE.get(i).id() == id) {
+                deleted = STORAGE.remove(i);
+                break;
+            }
+        }
+        return Optional.ofNullable(deleted);
+    }
+}

src/main/java/ua/com/dxrkness/repository/FreightRepository.java

@@ -0,0 +1,8 @@
+package ua.com.dxrkness.repository;
+
+import org.springframework.stereotype.Repository;
+import ua.com.dxrkness.model.Freight;
+
+@Repository
+public final class FreightRepository extends CrudRepository<Freight> {
+}

src/main/java/ua/com/dxrkness/repository/RouteRepository.java

@@ -0,0 +1,21 @@
+package ua.com.dxrkness.repository;
+
+import org.springframework.stereotype.Repository;
+import ua.com.dxrkness.model.Route;
+
+import java.util.Optional;
+
+@Repository
+public final class RouteRepository extends CrudRepository<Route> {
+    public Optional<Route> getByFreightId(long freightId) {
+        return STORAGE.stream()
+                .filter(route -> route.freights().stream().anyMatch(freight -> freight.id() == freightId))
+                .findAny();
+    }
+
+    public Optional<Route> getByVehicleId(long vehicleId) {
+        return STORAGE.stream()
+                .filter(route -> route.vehicle().id() == vehicleId)
+                .findAny();
+    }
+}

src/main/java/ua/com/dxrkness/repository/VehicleRepository.java

@@ -0,0 +1,8 @@
+package ua.com.dxrkness.repository;
+
+import org.springframework.stereotype.Repository;
+import ua.com.dxrkness.model.Vehicle;
+
+@Repository
+public final class VehicleRepository extends CrudRepository<Vehicle> {
+}

src/main/java/ua/com/dxrkness/service/FreightService.java

@@ -2,15 +2,36 @@ package ua.com.dxrkness.service;
 
 import org.springframework.stereotype.Service;
 import ua.com.dxrkness.model.Freight;
+import ua.com.dxrkness.repository.FreightRepository;
 
 import java.util.List;
 import java.util.Optional;
 
 @Service
-public class FreightService {
-    public List<Freight> getAll() { }
-    public Freight add(Freight freight) { }
-    public Optional<Freight> getById(long id) { }
-    public Freight update(long id, Freight newFreight) { }
-    public Freight delete(long id) { }
+public final class FreightService {
+    private final FreightRepository repo;
+
+    public FreightService(FreightRepository repo) {
+        this.repo = repo;
+    }
+
+    public List<Freight> getAll() {
+        return repo.getAll();
+    }
+
+    public Freight add(Freight freight) {
+        return repo.add(freight);
+    }
+
+    public Optional<Freight> getById(long id) {
+        return repo.getById(id);
+    }
+
+    public Freight update(long id, Freight newFreight) {
+        return repo.update(id, newFreight);
+    }
+
+    public Optional<Freight> delete(long id) {
+        return repo.delete(id);
+    }
 }

src/main/java/ua/com/dxrkness/service/RouteService.java

@@ -2,17 +2,44 @@ package ua.com.dxrkness.service;
 
 import org.springframework.stereotype.Service;
 import ua.com.dxrkness.model.Route;
+import ua.com.dxrkness.repository.RouteRepository;
 
 import java.util.List;
 import java.util.Optional;
 
 @Service
-public class RouteService {
-    public List<Route> getAll() { }
-    public Optional<Route> getById(long id) { }
-    public Route add(Route route) { }
-    public Route getByFreightId(long freightId) { }
-    public Route getByVehicleId(long vehicleId) { }
-    public Route update(long id, Route newRoute) { }
-    public Route delete(long id) { }
+public final class RouteService {
+    private final RouteRepository repo;
+
+    public RouteService(RouteRepository repo) {
+        this.repo = repo;
+    }
+
+    public List<Route> getAll() {
+        return repo.getAll();
+    }
+
+    public Optional<Route> getById(long id) {
+        return repo.getById(id);
+    }
+
+    public Route add(Route route) {
+        return repo.add(route);
+    }
+
+    public Optional<Route> getByFreightId(long freightId) {
+        return repo.getByFreightId(freightId);
+    }
+
+    public Optional<Route> getByVehicleId(long vehicleId) {
+        return repo.getByVehicleId(vehicleId);
+    }
+
+    public Route update(long id, Route newRoute) {
+        return repo.update(id, newRoute);
+    }
+
+    public Optional<Route> delete(long id) {
+        return repo.delete(id);
+    }
 }

src/main/java/ua/com/dxrkness/service/VehicleService.java

@@ -2,19 +2,36 @@ package ua.com.dxrkness.service;
 
 import org.springframework.stereotype.Service;
 import ua.com.dxrkness.model.Vehicle;
+import ua.com.dxrkness.repository.VehicleRepository;
 
 import java.util.List;
 import java.util.Optional;
 
 @Service
-public class VehicleService {
-    public List<Vehicle> getAll() { }
+public final class VehicleService {
+    private final VehicleRepository repo;
 
-    public Vehicle add(Vehicle veh) { }
+    public VehicleService(VehicleRepository repo) {
+        this.repo = repo;
+    }
 
-    public Optional<Vehicle> getById(long id) { }
+    public List<Vehicle> getAll() {
+        return repo.getAll();
+    }
 
-    public Vehicle update(long id, Vehicle newVehicle) { }
+    public Vehicle add(Vehicle veh) {
+        return repo.add(veh);
+    }
 
-    public Vehicle delete(long id) { }
+    public Optional<Vehicle> getById(long id) {
+        return repo.getById(id);
+    }
+
+    public Vehicle update(long id, Vehicle newVehicle) {
+        return repo.update(id, newVehicle);
+    }
+
+    public Optional<Vehicle> delete(long id) {
+        return repo.delete(id);
+    }
 }