FINERACT-2102: Loan Product enableDownPayment overrided in the Loan application

fineract-provider/src/main/java/org/apache/fineract/portfolio/loanaccount/api/LoansApiResourceSwagger.java

@@ -1245,6 +1245,8 @@ final class LoansApiResourceSwagger {
         public String loanScheduleProcessingType;
         @Schema(example = "false")
         public Boolean enableInstallmentLevelDelinquency;
+        @Schema(example = "false")
+        public Boolean enableDownPayment;
     }
 
     @Schema(description = "PostLoansResponse")
@@ -1394,6 +1396,8 @@ final class LoansApiResourceSwagger {
         public String loanScheduleProcessingType;
         @Schema(example = "false")
         public Boolean enableInstallmentLevelDelinquency;
+        @Schema(example = "false")
+        public Boolean enableDownPayment;
 
         static final class PutLoansLoanIdChanges {
 

fineract-provider/src/main/java/org/apache/fineract/portfolio/loanaccount/loanschedule/service/LoanScheduleAssembler.java

@@ -466,7 +466,11 @@ public class LoanScheduleAssembler {
         final boolean isPrincipalCompoundingDisabledForOverdueLoans = this.configurationDomainService
                 .isPrincipalCompoundingDisabledForOverdueLoans();
 
-        final boolean isDownPaymentEnabled = loanProduct.getLoanProductRelatedDetail().isEnableDownPayment();
+        boolean isDownPaymentEnabled = loanProduct.getLoanProductRelatedDetail().isEnableDownPayment();
+        if (this.fromApiJsonHelper.parameterExists(LoanProductConstants.ENABLE_DOWN_PAYMENT, element)) {
+            isDownPaymentEnabled = this.fromApiJsonHelper.extractBooleanNamed(LoanProductConstants.ENABLE_DOWN_PAYMENT, element);
+        }
+
         BigDecimal disbursedAmountPercentageForDownPayment = null;
         boolean isAutoRepaymentForDownPaymentEnabled = false;
         if (isDownPaymentEnabled) {
@@ -1379,6 +1383,22 @@ public class LoanScheduleAssembler {
             changes.put(LoanProductConstants.IS_EQUAL_AMORTIZATION_PARAM, newValue);
             loanProductRelatedDetail.setEqualAmortization(newValue);
         }
+
+        if (command.isChangeInBooleanParameterNamed(LoanProductConstants.ENABLE_DOWN_PAYMENT,
+                loanProductRelatedDetail.isEnableDownPayment())) {
+            final boolean newValue = command.booleanPrimitiveValueOfParameterNamed(LoanProductConstants.ENABLE_DOWN_PAYMENT);
+            changes.put(LoanProductConstants.ENABLE_DOWN_PAYMENT, newValue);
+            loanProductRelatedDetail.setEnableDownPayment(newValue);
+            if (!newValue) {
+                loanProductRelatedDetail.setEnableAutoRepaymentForDownPayment(false);
+                loanProductRelatedDetail.setDisbursedAmountPercentageForDownPayment(null);
+            } else {
+                loanProductRelatedDetail.setEnableAutoRepaymentForDownPayment(
+                        loan.loanProduct().getLoanProductRelatedDetail().isEnableAutoRepaymentForDownPayment());
+                loanProductRelatedDetail.setDisbursedAmountPercentageForDownPayment(
+                        loan.loanProduct().getLoanProductRelatedDetail().getDisbursedAmountPercentageForDownPayment());
+            }
+        }
     }
 
     public Pair<Loan, Map<String, Object>> assembleLoanApproval(AppUser currentUser, JsonCommand command, Long loanId) {
@@ -1446,4 +1466,5 @@ public class LoanScheduleAssembler {
 
         return Pair.of(loan, actualChanges);
     }
+
 }

fineract-provider/src/main/java/org/apache/fineract/portfolio/loanaccount/serialization/LoanApplicationValidator.java

@@ -169,7 +169,7 @@ public final class LoanApplicationValidator {
             LoanApiConstants.daysInYearTypeParameterName, LoanApiConstants.fixedPrincipalPercentagePerInstallmentParamName,
             LoanApiConstants.DISALLOW_EXPECTED_DISBURSEMENTS, LoanApiConstants.FRAUD_ATTRIBUTE_NAME,
             LoanProductConstants.LOAN_SCHEDULE_PROCESSING_TYPE, LoanProductConstants.FIXED_LENGTH,
-            LoanProductConstants.ENABLE_INSTALLMENT_LEVEL_DELINQUENCY));
+            LoanProductConstants.ENABLE_INSTALLMENT_LEVEL_DELINQUENCY, LoanProductConstants.ENABLE_DOWN_PAYMENT));
     public static final String LOANAPPLICATION_UNDO = "loanapplication.undo";
 
     private final FromJsonHelper fromApiJsonHelper;
@@ -741,6 +741,8 @@ public final class LoanApplicationValidator {
                 }
             }
 
+            loanScheduleValidator.validateDownPaymentAttribute(loanProduct.getLoanProductRelatedDetail().isEnableDownPayment(), element);
+
             checkForProductMixRestrictions(element);
             validateSubmittedOnDate(element, submittedOnDate, loanProduct);
             validateDisbursementDetails(loanProduct, element);
@@ -1396,6 +1398,8 @@ public final class LoanApplicationValidator {
                 }
             }
 
+            loanScheduleValidator.validateDownPaymentAttribute(loanProduct.getLoanProductRelatedDetail().isEnableDownPayment(), element);
+
             validateDisbursementDetails(loanProduct, element);
             validateSubmittedOnDate(element, loan.getSubmittedOnDate(), loanProduct);
             validateClientOrGroup(client, group, productId);

fineract-provider/src/main/java/org/apache/fineract/portfolio/loanaccount/serialization/LoanScheduleValidator.java

@@ -30,6 +30,7 @@ import java.util.Map;
 import java.util.Set;
 import org.apache.commons.lang3.StringUtils;
 import org.apache.fineract.infrastructure.core.data.ApiParameterError;
+import org.apache.fineract.infrastructure.core.exception.GeneralPlatformDomainRuleException;
 import org.apache.fineract.infrastructure.core.exception.InvalidJsonException;
 import org.apache.fineract.infrastructure.core.exception.PlatformApiDataValidationException;
 import org.apache.fineract.infrastructure.core.serialization.FromJsonHelper;
@@ -71,7 +72,8 @@ public final class LoanScheduleValidator {
             LoanApiConstants.repaymentFrequencyDayOfWeekTypeParameterName, LoanApiConstants.isTopup, LoanApiConstants.loanIdToClose,
             LoanApiConstants.datatables, LoanApiConstants.isEqualAmortizationParam, LoanProductConstants.RATES_PARAM_NAME,
             LoanApiConstants.daysInYearTypeParameterName, LoanApiConstants.fixedPrincipalPercentagePerInstallmentParamName,
-            LoanProductConstants.FIXED_LENGTH, LoanProductConstants.ENABLE_INSTALLMENT_LEVEL_DELINQUENCY));
+            LoanProductConstants.FIXED_LENGTH, LoanProductConstants.ENABLE_INSTALLMENT_LEVEL_DELINQUENCY,
+            LoanProductConstants.ENABLE_DOWN_PAYMENT));
 
     private final FromJsonHelper fromApiJsonHelper;
 
@@ -176,4 +178,15 @@ public final class LoanScheduleValidator {
             dataValidationErrors.add(error);
         }
     }
+
+    public void validateDownPaymentAttribute(final boolean isDownPaymentEnabledInLoanProduct, final JsonElement element) {
+        final Boolean inputIsDownPaymentEnabled = this.fromApiJsonHelper.extractBooleanNamed(LoanProductConstants.ENABLE_DOWN_PAYMENT,
+                element);
+        if (!isDownPaymentEnabledInLoanProduct && Boolean.TRUE.equals(inputIsDownPaymentEnabled)) {
+            throw new GeneralPlatformDomainRuleException("error.msg.downpayment.is.not.enabled.in.loan.product",
+                    "The Loan can not override the downpayment flag because in the Loan Product the downpayment is disabled",
+                    inputIsDownPaymentEnabled);
+        }
+    }
+
 }