Cleanup tender logic a bit; require amount

wuttapos/views/pos.py

@@ -138,7 +138,7 @@ class POSView(WuttaView):
             session.commit()
             self.add_row_item(row)
             self.items.scroll_to(offset=-1, duration=250)
-            self.txn_total.value = self.app.render_currency(batch.sales_total)
+            self.txn_total.value = self.app.render_currency(batch.get_balance())
             self.reset()
 
         else:
@@ -251,7 +251,16 @@ class POSView(WuttaView):
                         bgcolor='yellow',
                         visible=different,
                     ),
-                    ft.Markdown(info),
+                    ft.Divider(),
+                    ft.Container(
+                        theme_mode=ft.ThemeMode.SYSTEM,
+                        theme=ft.Theme(text_theme=ft.TextTheme(
+                            body_medium=ft.TextStyle(
+                                size=24,
+                                color='black',
+                            ))),
+                        content=ft.Markdown(info),
+                    ),
                 ],
                 height=500,
                 width=500,
@@ -400,7 +409,7 @@ class POSView(WuttaView):
             title=ft.Text("Remove Customer"),
             content=ft.Text("Really remove the customer from this transaction?", size=20),
             actions=[
-                ft.Container(content=ft.Text("Remove",
+                ft.Container(content=ft.Text("Yes, Remove",
                                              size=font_size,
                                              weight=ft.FontWeight.BOLD),
                              height=self.default_button_size,
@@ -711,25 +720,13 @@ class POSView(WuttaView):
                                 border_radius=ft.border_radius.all(5),
                                 bgcolor='orange')
 
-        cash = {
-            'tender_code': self.tender_cash.code if self.tender_cash else 'CA',
-            'tender_name': self.tender_cash.name if self.tender_cash else "Cash",
-        }
-
-        check = {
-            'tender_code': self.tender_check.code if self.tender_check else 'CK',
-            'tender_name': self.tender_check.name if self.tender_check else "Check",
-        }
-
         self.context_menu = ft.Container(
             content=ft.Column(
                 [
                     ft.Row(
                         [
-                            context_button(cash['tender_name'], data=cash,
+                            self.make_cash_button(),
-                                           on_click=self.tender_click),
+                            self.make_check_button(),
-                            context_button(check['tender_name'], data=check,
-                                           on_click=self.tender_click),
                         ],
                         spacing=0,
                     ),
@@ -786,6 +783,41 @@ class POSView(WuttaView):
         kwargs.setdefault('size', 24)
         return ft.Text(*args, **kwargs)
 
+    def make_tender_button(self, tender, **kwargs):
+        if isinstance(tender, self.model.Tender):
+            info = {'tender_code': tender.code,
+                    'tender_name': tender.name}
+        else:
+            info = tender
+
+        font_size = kwargs.pop('font_size', self.default_font_size)
+        text = ft.Text(info['tender_name'],
+                       size=font_size,
+                       weight=ft.FontWeight.BOLD)
+
+        kw = {
+            'height': self.default_button_size,
+            'width': self.default_button_size * 2,
+            'on_click': self.tender_click,
+            'alignment': ft.alignment.center,
+            'border': ft.border.all(1, 'black'),
+            'border_radius': ft.border_radius.all(5),
+            'bgcolor': 'orange',
+        }
+        kw.update(kwargs)
+        kw['data'] = info
+        return ft.Container(content=text, **kw)
+
+    def make_cash_button(self, **kwargs):
+        cash = self.tender_cash or {'tender_code': 'CA',
+                                    'tender_name': "Cash"}
+        return self.make_tender_button(cash, **kwargs)
+
+    def make_check_button(self, **kwargs):
+        check = self.tender_check or {'tender_code': 'CK',
+                                      'tender_name': "Check"}
+        return self.make_tender_button(check, **kwargs)
+
     def get_current_user(self, session):
         uuid = self.page.session.get('user_uuid')
         if uuid:
@@ -820,7 +852,7 @@ class POSView(WuttaView):
                 self.add_row_item(row)
             self.items.scroll_to(offset=-1, duration=100)
 
-            self.txn_total.value = self.app.render_currency(batch.sales_total)
+            self.txn_total.value = self.app.render_currency(batch.get_balance())
 
         else:
             self.page.session.set('txn_display', None)
@@ -954,9 +986,10 @@ class POSView(WuttaView):
         user = self.get_current_user(session)
         batch = self.get_current_batch(session, user=user, create=False)
 
+        # nothing to do if no transaction
         if not batch:
             session.close()
-            self.page.snack_bar = ft.SnackBar(ft.Text(f"NO TRANSACTION",
+            self.page.snack_bar = ft.SnackBar(ft.Text("NO TRANSACTION",
                                                       color='black',
                                                       size=20,
                                                       weight=ft.FontWeight.BOLD),
@@ -966,9 +999,38 @@ class POSView(WuttaView):
             self.reset()
             return
 
+        # nothing to do if zero sales
         if not batch.get_balance():
             session.close()
-            self.page.snack_bar = ft.SnackBar(ft.Text(f"NO SALES",
+            self.page.snack_bar = ft.SnackBar(ft.Text("NO SALES",
+                                                      color='black',
+                                                      size=20,
+                                                      weight=ft.FontWeight.BOLD),
+                                              bgcolor='yellow',
+                                              duration=1500)
+            self.page.snack_bar.open = True
+            self.reset()
+            return
+
+        # nothing to do if no amount provided
+        if not self.main_input.value:
+            session.close()
+            self.page.snack_bar = ft.SnackBar(ft.Text("MUST SPECIFY AMOUNT",
+                                                      color='black',
+                                                      size=20,
+                                                      weight=ft.FontWeight.BOLD),
+                                              bgcolor='yellow',
+                                              duration=1500)
+            self.page.snack_bar.open = True
+            self.reset()
+            return
+
+        # nothing to do if amount not valid
+        try:
+            amount = decimal.Decimal(self.main_input.value)
+        except:
+            session.close()
+            self.page.snack_bar = ft.SnackBar(ft.Text(f"AMOUNT NOT VALID: {self.main_input.value}",
                                                       color='black',
                                                       size=20,
                                                       weight=ft.FontWeight.BOLD),
@@ -981,13 +1043,16 @@ class POSView(WuttaView):
         # tender / execute batch
         code = e.control.data['tender_code']
         tender = handler.get_tender(session, code)
-        amount = -batch.get_balance()
         try:
 
-            # TODO: should prompt user for amount
+            # TODO: still need support for the following:
-            # TODO: also should display the tender item somehow,
+            # - if balance remains, update display (i.e. show this tender)
-            # unless that finalized txn in which case..??
+            # - if this tender overpays, how to handle change back?
-            row = handler.apply_tender(batch, user, tender or code, amount)
+
+            # apply tender amount to batch
+            # nb. this *may* execute the batch!
+            # nb. we negate the amount supplied by user
+            rows = handler.apply_tender(batch, user, tender or code, -amount)
 
         except Exception as error:
             session.rollback()
@@ -1003,13 +1068,18 @@ class POSView(WuttaView):
 
         else:
             session.commit()
+
+            # TODO: maybe shouldn't clear screen so immediately?
+            if batch.executed:
+                self.clear_all()
+
+            else:
+                # update screen to reflect new balance
+                self.txn_total.value = self.app.render_currency(batch.get_balance())
+
         finally:
             session.close()
 
-        # TODO: maybe shouldn't clear screen so immediately?
-        if batch.executed:
-            self.clear_all()
-
         self.reset()
 
     def clear_all(self):