Refactor and streamline premise creation logic.

- Removed redundant HS code checks in `materialCheck` of `PreCalculationCheckService`.
- Introduced `PropertyService` to manage default tariffs in `PremiseCreationService`.
- Adjusted `fillPremise` method to default to `SystemPropertyMappingId.TARIFF_RATE` when no tariff is specified.
- Improved code readability with formatting and added comments for better context.

src/main/java/de/avatic/lcc/service/api/TaxationResolverService.java

@@ -46,6 +46,7 @@ public class TaxationResolverService {
 
     private Map<TaxationResolverRequest, TaxationResolverApiResponse> doRequests(List<TaxationResolverRequest> requests) {
 
+        /* country id -> union type */
         Map<Integer, CustomUnionType> union = requests.stream()
                 .map(TaxationResolverRequest::countryId)
                 .distinct()
@@ -57,8 +58,10 @@ public class TaxationResolverService {
                                 .orElseThrow()
                 ));
 
+
         var byCustomUnion = requests.stream().collect(Collectors.groupingBy(r -> (union.get(r.countryId()))));
 
+        /* split by incomplete hs codes and complete hs codes */
         var filteredRequests = byCustomUnion.getOrDefault(CustomUnionType.NONE, Collections.emptyList()).stream().collect(Collectors.partitioningBy(r -> r.material().getHsCode() != null && r.material().getHsCode().length() < 10));
 
         var joined = Stream.concat(
@@ -293,7 +296,7 @@ public class TaxationResolverService {
                 }
             }
 
-            if (selectedDuty != null && (maxDuty - minDuty < 0.02)) {
+            if (selectedDuty != null && (maxDuty - minDuty <= 0.02)) {
                 return new TaxationResolverResponse(selectedDuty, selectedMeasure, selectedHsCode, request.material(), request.countryId());
             }
 

src/main/java/de/avatic/lcc/service/calculation/PremiseCreationService.java

@@ -7,6 +7,7 @@ import de.avatic.lcc.model.db.premises.Premise;
 import de.avatic.lcc.model.db.premises.PremiseState;
 import de.avatic.lcc.model.db.properties.PackagingProperty;
 import de.avatic.lcc.model.db.properties.PackagingPropertyMappingId;
+import de.avatic.lcc.model.db.properties.SystemPropertyMappingId;
 import de.avatic.lcc.repositories.MaterialRepository;
 import de.avatic.lcc.repositories.NodeRepository;
 import de.avatic.lcc.repositories.packaging.PackagingDimensionRepository;
@@ -14,8 +15,9 @@ import de.avatic.lcc.repositories.packaging.PackagingPropertiesRepository;
 import de.avatic.lcc.repositories.packaging.PackagingRepository;
 import de.avatic.lcc.repositories.premise.PremiseRepository;
 import de.avatic.lcc.repositories.users.UserNodeRepository;
-import de.avatic.lcc.service.api.CustomApiService;
 import de.avatic.lcc.service.access.DestinationService;
+import de.avatic.lcc.service.access.PropertyService;
+import de.avatic.lcc.service.api.CustomApiService;
 import de.avatic.lcc.service.api.TaxationResolverService;
 import de.avatic.lcc.service.transformer.generic.DimensionTransformer;
 import de.avatic.lcc.service.transformer.premise.PremiseTransformer;
@@ -27,7 +29,9 @@ import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
 import java.math.BigDecimal;
-import java.util.*;
+import java.util.Collections;
+import java.util.List;
+import java.util.Optional;
 import java.util.stream.Stream;
 
 @Service
@@ -44,8 +48,9 @@ public class PremiseCreationService {
     private final PackagingPropertiesRepository packagingPropertiesRepository;
     private final AuthorizationService authorizationService;
     private final TaxationResolverService taxationResolverService;
+    private final PropertyService propertyService;
 
-    public PremiseCreationService(PremiseRepository premiseRepository, PremiseTransformer premiseTransformer, DestinationService destinationService, UserNodeRepository userNodeRepository, NodeRepository nodeRepository, MaterialRepository materialRepository, DimensionTransformer dimensionTransformer, PackagingRepository packagingRepository, PackagingDimensionRepository packagingDimensionRepository, PackagingPropertiesRepository packagingPropertiesRepository, CustomApiService customApiService, AuthorizationService authorizationService, TaxationResolverService taxationResolverService) {
+    public PremiseCreationService(PremiseRepository premiseRepository, PremiseTransformer premiseTransformer, DestinationService destinationService, UserNodeRepository userNodeRepository, NodeRepository nodeRepository, MaterialRepository materialRepository, DimensionTransformer dimensionTransformer, PackagingRepository packagingRepository, PackagingDimensionRepository packagingDimensionRepository, PackagingPropertiesRepository packagingPropertiesRepository, CustomApiService customApiService, AuthorizationService authorizationService, TaxationResolverService taxationResolverService, PropertyService propertyService) {
         this.premiseRepository = premiseRepository;
         this.premiseTransformer = premiseTransformer;
         this.destinationService = destinationService;
@@ -59,6 +64,7 @@ public class PremiseCreationService {
 
         this.authorizationService = authorizationService;
         this.taxationResolverService = taxationResolverService;
+        this.propertyService = propertyService;
     }
 
     @Transactional
@@ -66,6 +72,8 @@ public class PremiseCreationService {
         var userId = authorizationService.getUserId();
         userNodeRepository.checkOwner(userSupplierIds, userId);
 
+        Optional<Double> defaultTariff = propertyService.getProperty(SystemPropertyMappingId.TARIFF_RATE);
+
         /* Build all resulting premises */
         List<TemporaryPremise> premises = Stream.concat(
                 supplierIds.stream().flatMap(id -> materialIds.stream().map(materialId -> new TemporaryPremise(materialId, id, null, false))),
@@ -82,13 +90,13 @@ public class PremiseCreationService {
             if (p.getPremise() == null) { // create new
 
                 p.setId(premiseRepository.insert(p.getMaterialId(), p.getSupplierId(), p.getUserSupplierId(), p.getGeoLat(), p.getGeoLng(), p.getCountryId(), userId));
-                fillPremise(p, tariffs, userId);
+                fillPremise(p, tariffs, defaultTariff, userId);
 
             } else if (p.getPremise().getState().equals(PremiseState.DRAFT)) { // recycle
                 p.setId(p.getPremise().getId());
                 if (createEmpty) {
                     // reset to defaults.
-                    fillPremise(p, tariffs, userId);
+                    fillPremise(p, tariffs, defaultTariff, userId);
                     // remove destinations
                     destinationService.deleteAllDestinationsByPremiseId(Collections.singletonList(p.getId()), false);
                 }
@@ -105,7 +113,6 @@ public class PremiseCreationService {
     }
 
 
-
     private void copyPremise(TemporaryPremise p, Integer userId) {
         var old = p.getPremise();
 
@@ -115,7 +122,7 @@ public class PremiseCreationService {
         premiseRepository.setPackagingId(p.getId(), old.getPackagingId());
     }
 
-    private void fillPremise(TemporaryPremise p, List<TaxationResolverService.TaxationResolverResponse> tariffs, Integer userId) {
+    private void fillPremise(TemporaryPremise p, List<TaxationResolverService.TaxationResolverResponse> tariffs, Optional<Double> optTariff, Integer userId) {
 
         if (!p.isUserSupplier()) {
             var packaging = packagingRepository.getByMaterialIdAndSupplierId(p.getMaterialId(), p.getSupplierId());
@@ -135,13 +142,15 @@ public class PremiseCreationService {
             premiseRepository.resetPrice(Collections.singletonList(p.getId()));
         }
 
+        var defaultTariff = optTariff.orElse(null);
+
         tariffs.stream()
                 .filter(r -> r.material().getId().equals(p.getMaterialId()) && r.countryId().equals(p.getCountryId()))
                 .findFirst()
                 .ifPresent(value -> premiseRepository.updateMaterial(Collections.singletonList(
                                 p.getId()),
                         value.actualHsCode(),
-                        value.tariffRate() == null ? null : BigDecimal.valueOf(value.tariffRate()),
+                        value.tariffRate() == null ? (defaultTariff == null ? null : BigDecimal.valueOf(defaultTariff)) : BigDecimal.valueOf(value.tariffRate()),
                         value.tariffRate() == null));
     }
 

src/main/java/de/avatic/lcc/service/precalculation/PreCalculationCheckService.java

@@ -324,14 +324,14 @@ public class PreCalculationCheckService {
 
     private void materialCheck(Premise premise) {
 
-        if (premise.getTariffUnlocked()) {
+//        if (premise.getTariffUnlocked()) {
-            if (premise.getHsCode() == null || premise.getHsCode().length() < 10)
+//            if (premise.getHsCode() == null || premise.getHsCode().length() < 10)
-                throw new PremiseValidationError("Invalid HS code (10 digits expected).");
+//                throw new PremiseValidationError("Invalid HS code (10 digits expected).");
-
+//
-            var isDeclarable = eUTaxationResolverService.validate(premise.getHsCode());
+//            var isDeclarable = eUTaxationResolverService.validate(premise.getHsCode());
-
+//
-            if (!isDeclarable) throw new PremiseValidationError("Invalid HS code (not declarable).");
+//            if (!isDeclarable) throw new PremiseValidationError("Invalid HS code (not declarable).");
-        }
+//        }
 
         if (premise.getTariffRate() == null) {
             throw new PremiseValidationError("Tariff rate not entered.");