add nuanced impl when querying stopped transactions

apply time window to stop_timestamp column instead of start_timestamp (the case for active transactions)

Author: goekay

src/main/java/de/rwth/idsg/steve/repository/impl/TransactionRepositoryImpl.java

@@ -327,9 +327,16 @@ private void processType(SelectQuery selectQuery, TransactionQueryForm form) {
                 break;
 
             case FROM_TO:
-                selectQuery.addConditions(
-                        TRANSACTION.START_TIMESTAMP.between(form.getFrom().toDateTime(), form.getTo().toDateTime())
-                );
+                DateTime from = form.getFrom().toDateTime();
+                DateTime to = form.getTo().toDateTime();
+
+                if (form.getType() == TransactionQueryForm.QueryType.ACTIVE) {
+                    selectQuery.addConditions(TRANSACTION.START_TIMESTAMP.between(from, to));
+
+                } else if (form.getType() == TransactionQueryForm.QueryType.STOPPED) {
+                    selectQuery.addConditions(TRANSACTION.STOP_TIMESTAMP.between(from, to));
+                }
+
                 break;
 
             default: