FINERACT-2311: Buy down fee - final amortization

- early repayment
- write off
- charge-off

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

@@ -1755,8 +1755,9 @@ public class Loan extends AbstractAuditableWithUTCDateTimeCustom<Long> {
 
     public LoanTransaction getLastUserTransaction() {
         return getLoanTransactions().stream() //
-                .filter(t -> t.isNotReversed()
-                        && !(t.isAccrual() || t.isAccrualAdjustment() || t.isIncomePosting() || t.isCapitalizedIncomeAmortization())) //
+                .filter(t -> t.isNotReversed() && !(t.isAccrual() || t.isAccrualAdjustment() || t.isIncomePosting()
+                        || t.isCapitalizedIncomeAmortization() || t.isCapitalizedIncomeAmortizationAdjustment()
+                        || t.isBuyDownFeeAmortization() || t.isBuyDownFeeAmortizationAdjustment())) //
                 .reduce((first, second) -> second) //
                 .orElse(null);
     }

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

@@ -706,6 +706,10 @@ public class LoanTransaction extends AbstractAuditableWithUTCDateTimeCustom<Long
         return LoanTransactionType.CAPITALIZED_INCOME_AMORTIZATION.equals(getTypeOf()) && isNotReversed();
     }
 
+    public boolean isCapitalizedIncomeAmortizationAdjustment() {
+        return LoanTransactionType.CAPITALIZED_INCOME_AMORTIZATION_ADJUSTMENT.equals(getTypeOf()) && isNotReversed();
+    }
+
     public boolean isCapitalizedIncomeAdjustment() {
         return LoanTransactionType.CAPITALIZED_INCOME_ADJUSTMENT.equals(getTypeOf()) && isNotReversed();
     }
@@ -998,4 +1002,16 @@ public class LoanTransaction extends AbstractAuditableWithUTCDateTimeCustom<Long
     public boolean isBuyDownFee() {
         return LoanTransactionType.BUY_DOWN_FEE.equals(this.typeOf);
     }
+
+    public boolean isBuyDownFeeAdjustment() {
+        return LoanTransactionType.BUY_DOWN_FEE_ADJUSTMENT.equals(this.typeOf);
+    }
+
+    public boolean isBuyDownFeeAmortization() {
+        return LoanTransactionType.BUY_DOWN_FEE_AMORTIZATION.equals(this.typeOf);
+    }
+
+    public boolean isBuyDownFeeAmortizationAdjustment() {
+        return LoanTransactionType.BUY_DOWN_FEE_AMORTIZATION_ADJUSTMENT.equals(this.typeOf);
+    }
 }

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

@@ -20,9 +20,16 @@ package org.apache.fineract.portfolio.loanaccount.service;
 
 import java.time.LocalDate;
 import org.apache.fineract.portfolio.loanaccount.domain.Loan;
+import org.apache.fineract.portfolio.loanaccount.domain.LoanTransaction;
 import org.springframework.lang.NonNull;
 
 public interface LoanBuyDownFeeAmortizationProcessingService {
 
     void processBuyDownFeeAmortizationTillDate(@NonNull Loan loan, @NonNull LocalDate tillDate, boolean addJournal);
+
+    void processBuyDownFeeAmortizationOnLoanClosure(@NonNull Loan loan, boolean addJournal);
+
+    void processBuyDownFeeAmortizationOnLoanChargeOff(@NonNull Loan loan, @NonNull LoanTransaction chargeOffTransaction);
+
+    void processBuyDownFeeAmortizationOnLoanUndoChargeOff(@NonNull LoanTransaction loanTransaction);
 }