0035623: [SER-QA 2673] In a paid ticket, when trying to add a new payment, providers are executed before rejecting the payment

# HG changeset patch
# User Adrián Romero <adrianromero@openbravo.com>
# Date 1490618490 -7200
#      Mon Mar 27 14:41:30 2017 +0200
# Node ID cca0185e736bd1966f1d1928d3968450c662aa85
# Parent  04341a94f07842da70842bbfd6ca3d53112bff0f
Fixes issue 0035623: [SER-QA 2673] In a paid ticket, when trying to add a new payment, providers are executed before rejecting the payment

diff --git a/web/org.openbravo.retail.posterminal/js/pointofsale/view/keyboard-toolbars.js b/web/org.openbravo.retail.posterminal/js/pointofsale/view/keyboard-toolbars.js
--- a/web/org.openbravo.retail.posterminal/js/pointofsale/view/keyboard-toolbars.js
+++ b/web/org.openbravo.retail.posterminal/js/pointofsale/view/keyboard-toolbars.js
@@ -77,6 +77,13 @@
       OB.UTIL.showWarning(OB.I18N.getLabel('OBPOS_CannotAddPayments'));
       return;
     }
+
+    // Checks to be done BEFORE payment provider is invoked.
+    if (this.receipt.get('isPaid') && !this.receipt.get('doCancelAndReplace') && this.receipt.getPrePaymentQty() === OB.DEC.sub(this.receipt.getTotal(), this.receipt.getCredit()) && !this.receipt.isNewReversed()) {
+      OB.UTIL.showWarning(OB.I18N.getLabel('OBPOS_CannotIntroducePayment'));
+      return;
+    }
+
     if (options && options.percentaje) {
       var pending = this.model.getPending();
       if (mulrate && mulrate !== '1') {