Add stub logic to kick drawer for "no sale" and based on txn tenders

wuttapos/views/pos.py

@@ -619,7 +619,7 @@ class POSView(WuttaView):
                         [
                             meta_button("Adjust\nPrice", font_size=30, bgcolor='yellow',
                                         on_click=self.adjust_price_click),
-                            meta_button("TODO", bgcolor='blue', on_click=self.not_supported),
+                            meta_button("NO SALE", bgcolor='yellow', on_click=self.nosale_click),
                         ],
                         spacing=0,
                     ),
@@ -958,6 +958,22 @@ class POSView(WuttaView):
         dlg.open = True
         self.page.update()
 
+    def nosale_click(self, e):
+        session = self.app.make_session()
+        batch = self.get_current_batch(session, create=False)
+        session.close()
+
+        if batch:
+            self.show_snackbar("TRANSACTION IN PROGRESS", bgcolor='yellow')
+            self.page.update()
+            return
+
+        self.kick_drawer()
+
+    def kick_drawer(self):
+        self.show_snackbar("TODO: Drawer Kick", bgcolor='yellow')
+        self.page.update()
+
     def add_row_item(self, row):
 
         # TODO: row types ugh
@@ -1065,7 +1081,7 @@ class POSView(WuttaView):
 
         # nothing to void if no batch
         if not batch:
-            self.show_snackbar("No transaction", bgcolor='yellow')
+            self.show_snackbar("NO TRANSACTION", bgcolor='yellow')
             self.reset()
             return
 
@@ -1202,10 +1218,6 @@ class POSView(WuttaView):
         # tender / execute batch
         try:
 
-            # TODO: still need support for the following:
-            # - if balance remains, update display (i.e. show this tender)
-            # - if this tender overpays, how to handle change back?
-
             # apply tender amount to batch
             # nb. this *may* execute the batch!
             # nb. we negate the amount supplied by user
@@ -1273,6 +1285,13 @@ class POSView(WuttaView):
                     # txn finalized but no change back; clear screen
                     self.clear_all()
 
+                # kick drawer if accepting any tender which requires
+                # that, or if we are giving change back
+                first_row = rows[0]
+                if ((first_row.tender and first_row.tender.kick_drawer)
+                    or last_row.row_type == self.enum.POS_ROW_TYPE_CHANGE_BACK):
+                    self.kick_drawer()
+
         finally:
             session.close()