FINERACT-2308: Allow approval and disbursal above loan applied amount with non multibursal loan product

fineract-loan/src/main/java/org/apache/fineract/portfolio/loanproduct/domain/LoanProduct.java

@@ -410,7 +410,7 @@ public class LoanProduct extends AbstractPersistableCustom<Long> {
         }
 
         if (this.allowApprovedDisbursedAmountsOverApplied) {
-            if (!this.disallowExpectedDisbursements) {
+            if (this.isMultiDisburseLoan() && !this.disallowExpectedDisbursements) {
                 throw new LoanProductGeneralRuleException(
                         "disallowExpectedDisbursements.not.set.allowApprovedDisbursedAmountsOverApplied.cant.be.set",
                         "Disallow Expected Disbursals Not Set - Allow Approved / Disbursed Amounts Over Applied Can't Be Set");

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

@@ -2124,7 +2124,7 @@ public final class LoanApplicationValidator {
     }
 
     private void compareApprovedToProposedPrincipal(Loan loan, BigDecimal approvedLoanAmount) {
-        if (loan.loanProduct().isDisallowExpectedDisbursements() && loan.loanProduct().isAllowApprovedDisbursedAmountsOverApplied()) {
+        if (loan.loanProduct().isAllowApprovedDisbursedAmountsOverApplied()) {
             BigDecimal maxApprovedLoanAmount = getOverAppliedMax(loan);
             if (approvedLoanAmount.compareTo(maxApprovedLoanAmount) > 0) {
                 final String errorMessage = "Loan approved amount can't be greater than maximum applied loan amount calculation.";

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

@@ -37,26 +37,34 @@ public final class LoanDisbursementValidator {
             final BigDecimal totalDisbursed) {
         final BigDecimal capitalizedIncome = loan.getSummary().getTotalCapitalizedIncome();
         if (loan.loanProduct().isDisallowExpectedDisbursements() && loan.loanProduct().isAllowApprovedDisbursedAmountsOverApplied()) {
-            final BigDecimal maxDisbursedAmount = loanApplicationValidator.getOverAppliedMax(loan);
-            if (totalDisbursed.add(capitalizedIncome).compareTo(maxDisbursedAmount) > 0) {
-                final String errorMessage = String.format(
-                        "Loan disbursal amount can't be greater than maximum applied loan amount calculation. "
-                                + "Total disbursed amount: %s  Maximum disbursal amount: %s",
-                        totalDisbursed.stripTrailingZeros().toPlainString(), maxDisbursedAmount.stripTrailingZeros().toPlainString());
-                throw new InvalidLoanStateTransitionException("disbursal",
-                        "amount.can't.be.greater.than.maximum.applied.loan.amount.calculation", errorMessage, disbursedAmount,
-                        maxDisbursedAmount);
-            }
+            validateOverMaximumAmount(loan, totalDisbursed, capitalizedIncome);
         } else {
-            if ((totalDisbursed.compareTo(loan.getApprovedPrincipal()) > 0)
-                    || (totalDisbursed.add(capitalizedIncome).compareTo(loan.getApprovedPrincipal()) > 0)) {
-                final String errorMsg = "Loan can't be disbursed,disburse amount is exceeding approved principal ";
-                throw new LoanDisbursalException(errorMsg, "disburse.amount.must.be.less.than.approved.principal", totalDisbursed,
-                        loan.getApprovedPrincipal());
+            if (loan.loanProduct().isAllowApprovedDisbursedAmountsOverApplied()) {
+                validateOverMaximumAmount(loan, disbursedAmount, capitalizedIncome);
+            } else {
+                if ((totalDisbursed.compareTo(loan.getApprovedPrincipal()) > 0)
+                        || (totalDisbursed.add(capitalizedIncome).compareTo(loan.getApprovedPrincipal()) > 0)) {
+                    final String errorMsg = "Loan can't be disbursed,disburse amount is exceeding approved principal ";
+                    throw new LoanDisbursalException(errorMsg, "disburse.amount.must.be.less.than.approved.principal", totalDisbursed,
+                            loan.getApprovedPrincipal());
+                }
             }
         }
     }
 
+    public void validateOverMaximumAmount(final Loan loan, final BigDecimal totalDisbursed, final BigDecimal capitalizedIncome) {
+        final BigDecimal maxDisbursedAmount = loanApplicationValidator.getOverAppliedMax(loan);
+        if (totalDisbursed.add(capitalizedIncome).compareTo(maxDisbursedAmount) > 0) {
+            final String errorMessage = String.format(
+                    "Loan disbursal amount can't be greater than maximum applied loan amount calculation. "
+                            + "Total disbursed amount: %s  Maximum disbursal amount: %s",
+                    totalDisbursed.stripTrailingZeros().toPlainString(), maxDisbursedAmount.stripTrailingZeros().toPlainString());
+            throw new InvalidLoanStateTransitionException("disbursal",
+                    "amount.can't.be.greater.than.maximum.applied.loan.amount.calculation", errorMessage, totalDisbursed,
+                    maxDisbursedAmount);
+        }
+    }
+
     public void validateDisburseAmountNotExceedingApprovedAmount(final Loan loan, final BigDecimal diff,
             final BigDecimal principalDisbursed) {
         if (!loan.loanProduct().isMultiDisburseLoan() && diff.compareTo(BigDecimal.ZERO) < 0) {

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

@@ -146,10 +146,10 @@ public class LoanDisbursementService {
                     disbursementDetails.updatePrincipal(principalDisbursed);
                 }
             }
+            BigDecimal totalAmount = BigDecimal.ZERO;
             if (loan.loanProduct().isMultiDisburseLoan()) {
                 Collection<LoanDisbursementDetails> loanDisburseDetails = loan.getDisbursementDetails();
                 BigDecimal setPrincipalAmount = BigDecimal.ZERO;
-                BigDecimal totalAmount = BigDecimal.ZERO;
                 for (LoanDisbursementDetails disbursementDetails : loanDisburseDetails) {
                     if (disbursementDetails.actualDisbursementDate() != null) {
                         setPrincipalAmount = setPrincipalAmount.add(disbursementDetails.principal());
@@ -157,12 +157,11 @@ public class LoanDisbursementService {
                     totalAmount = totalAmount.add(disbursementDetails.principal());
                 }
                 loan.getLoanRepaymentScheduleDetail().setPrincipal(setPrincipalAmount);
-                loanDisbursementValidator.compareDisbursedToApprovedOrProposedPrincipal(loan, disburseAmount.getAmount(), totalAmount);
             } else {
                 loan.getLoanRepaymentScheduleDetail()
                         .setPrincipal(loan.getLoanRepaymentScheduleDetail().getPrincipal().minus(diff).getAmount());
             }
-            loanDisbursementValidator.validateDisburseAmountNotExceedingApprovedAmount(loan, diff, principalDisbursed);
+            loanDisbursementValidator.compareDisbursedToApprovedOrProposedPrincipal(loan, disburseAmount.getAmount(), totalAmount);
         }
         return disburseAmount;
     }

integration-tests/src/test/java/org/apache/fineract/integrationtests/AdvancedPaymentAllocationLoanRepaymentScheduleTest.java

@@ -5946,6 +5946,61 @@ public class AdvancedPaymentAllocationLoanRepaymentScheduleTest extends BaseLoan
         });
     }
 
+    // UC155: Validate allowApprovedDisbursedAmountsOverApplied setting on Non MultiDisbursement Loan Product
+    // 1. Create a Loan product with allowApprovedDisbursedAmountsOverApplied in true using overAppliedCalculationType
+    // flat amount
+    // 2. Submit Loan with 1,000
+    // 3. Approve the Loan with 1,300
+    // 4. Disburse the Loan with 1,450
+    @Test
+    public void uc155() {
+        final String operationDate = "1 January 2024";
+        AtomicLong createdLoanId = new AtomicLong();
+        runAt(operationDate, () -> {
+            Long clientId = clientHelper.createClient(ClientHelper.defaultClientCreationRequest()).getClientId();
+            PostLoanProductsRequest product = createOnePeriod30DaysLongNoInterestPeriodicAccrualProductWithAdvancedPaymentAllocation()
+                    .interestRatePerPeriod(12.0).interestCalculationPeriodType(RepaymentFrequencyType.DAYS).numberOfRepayments(4)//
+                    .repaymentEvery(1)//
+                    .repaymentFrequencyType(1L)//
+                    .allowPartialPeriodInterestCalcualtion(false)//
+                    .installmentAmountInMultiplesOf(null)//
+                    .multiDisburseLoan(false)//
+                    .disallowExpectedDisbursements(null)//
+                    .allowApprovedDisbursedAmountsOverApplied(true)//
+                    .overAppliedCalculationType("flat")//
+                    .overAppliedNumber(500)//
+            ;//
+            PostLoanProductsResponse loanProductResponse = loanProductHelper.createLoanProduct(product);
+            PostLoansRequest applicationRequest = applyLoanRequest(clientId, loanProductResponse.getResourceId(), operationDate, 1000.0, 4)
+                    .transactionProcessingStrategyCode("advanced-payment-allocation-strategy")//
+                    .interestRatePerPeriod(BigDecimal.valueOf(12.0));
+
+            PostLoansResponse loanResponse = loanTransactionHelper.applyLoan(applicationRequest);
+            createdLoanId.set(loanResponse.getLoanId());
+
+            loanTransactionHelper.approveLoan(loanResponse.getLoanId(), new PostLoansLoanIdRequest()
+                    .approvedLoanAmount(BigDecimal.valueOf(1300)).dateFormat(DATETIME_PATTERN).approvedOnDate(operationDate).locale("en"));
+            GetLoansLoanIdResponse loanDetails = loanTransactionHelper.getLoanDetails(createdLoanId.get());
+            assertTrue(loanDetails.getStatus().getWaitingForDisbursal());
+            assertEquals("1300.000000", loanDetails.getApprovedPrincipal().toString());
+
+            CallFailedRuntimeException callFailedRuntimeException = Assertions.assertThrows(CallFailedRuntimeException.class,
+                    () -> loanTransactionHelper.disburseLoan(loanResponse.getLoanId(),
+                            new PostLoansLoanIdRequest().actualDisbursementDate(operationDate).dateFormat(DATETIME_PATTERN).locale("en")
+                                    .transactionAmount(BigDecimal.valueOf(1550.0))));
+
+            Assertions.assertTrue(callFailedRuntimeException.getMessage()
+                    .contains("Loan disbursal amount can't be greater than maximum applied loan amount calculation"));
+
+            loanTransactionHelper.disburseLoan(loanResponse.getLoanId(), new PostLoansLoanIdRequest().actualDisbursementDate(operationDate)
+                    .dateFormat(DATETIME_PATTERN).locale("en").transactionAmount(BigDecimal.valueOf(1450.0)));
+
+            loanDetails = loanTransactionHelper.getLoanDetails(createdLoanId.get());
+            assertTrue(loanDetails.getStatus().getActive());
+            assertEquals("1450.000000", loanDetails.getSummary().getPrincipalOutstanding().toString());
+        });
+    }
+
     private Long applyAndApproveLoanProgressiveAdvancedPaymentAllocationStrategyMonthlyRepayments(Long clientId, Long loanProductId,
             Integer numberOfRepayments, String loanDisbursementDate, double amount) {
         LOG.info("------------------------------APPLY AND APPROVE LOAN ---------------------------------------");