MIFOSX-565: written off loans reverse their write off transaction when undoing or adjusting transaction on closed-written off loan, closed-rescheduled loans switch to active when transactions is undone.

mifosng-provider/src/main/java/org/mifosplatform/portfolio/loanaccount/domain/Loan.java

@@ -1753,6 +1753,17 @@ public class Loan extends AbstractPersistable<Long> {
         }
 
         transactionForAdjustment.reverse();
+
+        if (isClosedWrittenOff()) {
+            // find write off transaction and reverse it
+            LoanTransaction writeOffTransaction = findWriteOffTransaction();
+            writeOffTransaction.reverse();
+        }
+
+        if (isClosedObligationsMet() || isClosedWrittenOff() || isClosedWithOutsandingAmountMarkedForReschedule()) {
+            this.loanStatus = LoanStatus.ACTIVE.getValue();
+        }
+
         if (newTransactionDetail.isRepayment() || newTransactionDetail.isInterestWaiver()) {
             changedTransactionDetail = handleRepaymentOrWaiverTransaction(newTransactionDetail, loanLifecycleStateMachine,
                     transactionForAdjustment);
@@ -1761,6 +1772,18 @@ public class Loan extends AbstractPersistable<Long> {
         return changedTransactionDetail;
     }
 
+    private LoanTransaction findWriteOffTransaction() {
+
+        LoanTransaction writeOff = null;
+        for (LoanTransaction transaction : this.loanTransactions) {
+            if (!transaction.isReversed() && transaction.isWriteOff()) {
+                writeOff = transaction;
+            }
+        }
+
+        return writeOff;
+    }
+
     private boolean isOverPaid() {
         return calculateTotalOverpayment().isGreaterThanZero();
     }
@@ -1984,6 +2007,18 @@ public class Loan extends AbstractPersistable<Long> {
         return status().isClosed() || this.isCancelled();
     }
 
+    private boolean isClosedObligationsMet() {
+        return status().isClosedObligationsMet();
+    }
+
+    private boolean isClosedWrittenOff() {
+        return status().isClosedWrittenOff();
+    }
+
+    private boolean isClosedWithOutsandingAmountMarkedForReschedule() {
+        return status().isClosedWithOutsandingAmountMarkedForReschedule();
+    }
+
     private boolean isCancelled() {
         return this.isRejected() || this.isWithdrawn();
     }