CIRC-2019 Renewal by override, flag block on loan

  - For the client (UI) to know up-front to display override modal.

(cherry picked from commit 94196ff)

src/main/java/org/folio/circulation/domain/LoanRepresentation.java

@@ -6,6 +6,8 @@
 import static org.folio.circulation.domain.representations.LoanProperties.LOST_ITEM_POLICY;
 import static org.folio.circulation.domain.representations.LoanProperties.OVERDUE_FINE_POLICY;
 import static org.folio.circulation.domain.representations.LoanProperties.PATRON_GROUP_ID_AT_CHECKOUT;
+import static org.folio.circulation.domain.representations.LoanProperties.REMINDERS;
+
 import static org.folio.circulation.support.json.JsonPropertyWriter.write;
 
 import java.lang.invoke.MethodHandles;
@@ -59,6 +61,15 @@ public JsonObject extendedLoan(Loan loan) {
       extendedRepresentation.remove(BORROWER);
     }
 
+    if (loan.getOverdueFinePolicy().isReminderFeesPolicy()
+      && loan.getLastReminderFeeBilledNumber() != null) {
+      extendedRepresentation.getJsonObject(REMINDERS)
+        .put("renewalBlocked",
+          !loan.getOverdueFinePolicy()
+            .getRemindersPolicy().getAllowRenewalOfItemsWithReminderFees());
+    }
+
+
     addPolicy(extendedRepresentation, loan.getLoanPolicy(), LOAN_POLICY);
     addPolicy(extendedRepresentation, loan.getOverdueFinePolicy(), OVERDUE_FINE_POLICY);
     addPolicy(extendedRepresentation, loan.getLostItemPolicy(), LOST_ITEM_POLICY);