add QR/Barcode scan

app/views/foodcourt/orders/app_orders.html.erb

@@ -500,7 +500,7 @@
 </div>
 <div id="sxModal">
   <div id="sxModal-Content">
-    <h3>Card Tap</h3>
+    <h3>Scan OR Tap Card</h3>
   </div>
   <div style="position: absolute; bottom: 0; margin-left: 45%; margin-bottom: 60px;">
       <button type="button" class="btn btn-lg btn-link bg-red waves-effect btn_cancel">Cancel</button>
@@ -519,6 +519,12 @@
     $("#sxModal").attr('data-for', 'member');
     var sale_id = $('#sale_id').text();
     getCardNo();
+
+    onScan.attachTo(document, {
+      onScan: function(sCode) {
+        setCardNo(sCode)
+      }
+    });
   });
 //  $('#pay').on('click', function () {
 //     // var sale_id = $('#sale_id').text();