FINERACT-2107: Loan transaction Interest Refund GL Entries

fineract-loan/src/main/java/org/apache/fineract/portfolio/loanaccount/data/LoanRefundRequestData.java

@@ -0,0 +1,39 @@
+/**
+ * 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.data;
+
+import java.math.BigDecimal;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+
+@Data
+@AllArgsConstructor
+public class LoanRefundRequestData {
+
+    private final BigDecimal principal;
+    private final BigDecimal interest;
+    private final BigDecimal feeCharges;
+    private final BigDecimal penaltyCharges;
+    private final BigDecimal overpayment;
+
+    public BigDecimal getTotalAmount() {
+        return principal.add(interest).add(feeCharges).add(penaltyCharges);
+    }
+
+}

fineract-loan/src/main/java/org/apache/fineract/portfolio/loanaccount/data/LoanTransactionEnumData.java

@@ -60,6 +60,7 @@ public class LoanTransactionEnumData {
     private final boolean reAge;
     private final boolean reAmortize;
     private final boolean accrualActivity;
+    private final boolean interestRefund;
 
     public LoanTransactionEnumData(final Long id, final String code, final String value) {
         this.id = id;
@@ -94,6 +95,7 @@ public class LoanTransactionEnumData {
         this.accrualActivity = Long.valueOf(32).equals(this.id);
         this.reAge = Long.valueOf(LoanTransactionType.REAGE.getValue()).equals(this.id);
         this.reAmortize = Long.valueOf(LoanTransactionType.REAMORTIZE.getValue()).equals(this.id);
+        this.interestRefund = Long.valueOf(LoanTransactionType.INTEREST_REFUND.getValue()).equals(this.id);
     }
 
     public boolean isRepaymentType() {

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

@@ -27,6 +27,7 @@ import org.apache.fineract.infrastructure.core.data.CommandProcessingResultBuild
 import org.apache.fineract.infrastructure.core.domain.ExternalId;
 import org.apache.fineract.portfolio.delinquency.validator.LoanDelinquencyActionData;
 import org.apache.fineract.portfolio.loanaccount.data.HolidayDetailDTO;
+import org.apache.fineract.portfolio.loanaccount.data.LoanRefundRequestData;
 import org.apache.fineract.portfolio.paymentdetail.domain.PaymentDetail;
 
 public interface LoanAccountDomainService {
@@ -93,4 +94,6 @@ public interface LoanAccountDomainService {
     LoanTransaction creditBalanceRefund(Loan loan, LocalDate transactionDate, BigDecimal transactionAmount, String noteText,
             ExternalId externalId, PaymentDetail paymentDetail);
 
+    LoanTransaction applyInterestRefund(Loan loan, LoanRefundRequestData loanRefundRequest);
+
 }

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

@@ -323,6 +323,13 @@ public class LoanTransaction extends AbstractAuditableWithUTCDateTimeCustom<Long
                 externalId);
     }
 
+    public static LoanTransaction interestRefund(final Loan loan, final Office office, final BigDecimal amount, final BigDecimal principal,
+            final BigDecimal interest, final BigDecimal feeCharges, final BigDecimal penaltyCharges, final PaymentDetail paymentDetail,
+            final LocalDate refundDate, final ExternalId externalId) {
+        return new LoanTransaction(loan, office, LoanTransactionType.INTEREST_REFUND.getValue(), refundDate, amount, principal, interest,
+                feeCharges, penaltyCharges, amount, false, paymentDetail, externalId);
+    }
+
     public static boolean transactionAmountsMatch(final MonetaryCurrency currency, final LoanTransaction loanTransaction,
             final LoanTransaction newLoanTransaction) {
         return loanTransaction.getAmount(currency).isEqualTo(newLoanTransaction.getAmount(currency))