FINERACT-2107: Interest Refund - Transaction Amount Recalculation

fineract-loan/src/main/java/org/apache/fineract/portfolio/loanaccount/domain/Loan.java

@@ -141,6 +141,7 @@ import org.apache.fineract.portfolio.loanproduct.domain.InterestRecalculationCom
 import org.apache.fineract.portfolio.loanproduct.domain.LoanProduct;
 import org.apache.fineract.portfolio.loanproduct.domain.LoanProductRelatedDetail;
 import org.apache.fineract.portfolio.loanproduct.domain.LoanRescheduleStrategyMethod;
+import org.apache.fineract.portfolio.loanproduct.domain.LoanSupportedInterestRefundTypes;
 import org.apache.fineract.portfolio.loanproduct.domain.RecalculationFrequencyType;
 import org.apache.fineract.portfolio.loanproduct.domain.RepaymentStartDateType;
 import org.apache.fineract.portfolio.loanproduct.service.LoanEnumerations;
@@ -5452,6 +5453,11 @@ public class Loan extends AbstractAuditableWithUTCDateTimeCustom<Long> {
         }
     }
 
+    public List<LoanTransactionType> getSupportedInterestRefundTransactionTypes() {
+        return getLoanProductRelatedDetail().getSupportedInterestRefundTypes().stream()
+                .map(LoanSupportedInterestRefundTypes::getTransactionType).toList();
+    }
+
     public LoanTransaction getLastUserTransaction() {
         return getLoanTransactions().stream() //
                 .filter(LoanTransaction::isNotReversed) //

fineract-loan/src/main/java/org/apache/fineract/portfolio/loanaccount/domain/LoanTransaction.java

@@ -1052,6 +1052,10 @@ public class LoanTransaction extends AbstractAuditableWithUTCDateTimeCustom<Long
         return getTypeOf().isInterestRefund();
     }
 
+    public void updateAmount(BigDecimal bigDecimal) {
+        this.amount = bigDecimal;
+    }
+
     // TODO missing hashCode(), equals(Object obj), but probably OK as long as
     // this is never stored in a Collection.
 }

fineract-loan/src/main/java/org/apache/fineract/portfolio/loanaccount/service/InterestRefundService.java

@@ -18,15 +18,23 @@
  */
 package org.apache.fineract.portfolio.loanaccount.service;
 
-import java.math.BigDecimal;
 import java.time.LocalDate;
+import java.util.List;
+import org.apache.fineract.organisation.monetary.domain.MonetaryCurrency;
+import org.apache.fineract.organisation.monetary.domain.Money;
 import org.apache.fineract.portfolio.loanaccount.domain.Loan;
+import org.apache.fineract.portfolio.loanaccount.domain.LoanTransaction;
+import org.apache.fineract.portfolio.loanaccount.domain.transactionprocessor.LoanRepaymentScheduleTransactionProcessor;
+import org.springframework.transaction.annotation.Propagation;
+import org.springframework.transaction.annotation.Transactional;
 
 public interface InterestRefundService {
 
     boolean canHandle(Loan loan);
 
-    BigDecimal calculateInterestRefundAmount(Long loanId, BigDecimal relatedRefundTransactionAmount,
-            LocalDate relatedRefundTransactionDate);
+    @Transactional(readOnly = true, propagation = Propagation.REQUIRES_NEW)
+    Money totalInterestByTransactions(LoanRepaymentScheduleTransactionProcessor processor, Long loanId,
+            LocalDate relatedRefundTransactionDate, List<LoanTransaction> newTransactions, List<Long> oldTransactionIds);
 
+    Money getTotalInterestRefunded(List<LoanTransaction> loanTransactions, MonetaryCurrency currency);
 }

fineract-loan/src/main/java/org/apache/fineract/portfolio/loanaccount/service/InterestRefundServiceDelegate.java

@@ -1,35 +0,0 @@
-/**
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements. See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership. The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied. See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-package org.apache.fineract.portfolio.loanaccount.service;
-
-import java.util.List;
-import lombok.RequiredArgsConstructor;
-import org.apache.fineract.portfolio.loanaccount.domain.Loan;
-import org.springframework.stereotype.Service;
-
-@Service
-@RequiredArgsConstructor
-public class InterestRefundServiceDelegate {
-
-    private final List<InterestRefundService> interestRefundService;
-
-    public InterestRefundService lookupInterestRefundService(final Loan loan) {
-        return interestRefundService.stream().filter(iRS -> iRS.canHandle(loan)).findFirst().orElse(null);
-    }
-}