Add first attempt at food stamp support

definitely does not work right yet, will have to circle back

wuttapos/controls/txnitem.py

@@ -66,7 +66,8 @@ class WuttaTxnItem(WuttaControl):
 
         self.sales_total = ft.TextSpan(style=self.sales_total_style)
 
-        self.tax_flag = ft.TextSpan(style=self.major_style)
+        self.fs_flag = ft.TextSpan(style=self.minor_style)
+        self.tax_flag = ft.TextSpan(style=self.minor_style)
 
         # set initial text display values
         self.refresh(update=False)
@@ -85,9 +86,9 @@ class WuttaTxnItem(WuttaControl):
                 ),
                 ft.Text(
                     spans=[
-                        self.sales_total,
+                        self.fs_flag,
-                        ft.TextSpan("   "),
                         self.tax_flag,
+                        self.sales_total,
                     ],
                 ),
 
@@ -135,7 +136,8 @@ class WuttaTxnItem(WuttaControl):
             self.quantity.text = self.app.render_quantity(self.row.quantity)
             self.txn_price.text = self.app.render_currency(self.row.txn_price)
             self.sales_total.text = self.app.render_currency(self.row.sales_total)
-            self.tax_flag.text = f"T{self.row.tax_code}" if self.row.tax_code else ""
+            self.fs_flag.text = "FS   " if self.row.foodstamp_eligible else ""
+            self.tax_flag.text = f"T{self.row.tax_code}   " if self.row.tax_code else ""
 
             if self.row.void:
                 self.sales_total_style.color = None

wuttapos/views/pos.py

@@ -150,7 +150,20 @@ class POSView(WuttaView):
             total = self.app.render_currency(batch.tender_total)
             self.subtotals.spans.append(ft.TextSpan(total, style=bold))
 
-        self.txn_balance.value = self.app.render_currency(batch.get_balance() or 0)
+        self.fs_balance.spans.clear()
+
+        fs_balance = batch.get_fs_balance()
+        if fs_balance:
+            self.fs_balance.spans.append(ft.TextSpan("FS  ", style=reg))
+            total = self.app.render_currency(fs_balance)
+            self.fs_balance.spans.append(ft.TextSpan(total, style=bold))
+
+        self.balances.spans.clear()
+
+        self.balances.spans.append(ft.TextSpan("    ", style=reg))
+        total = self.app.render_currency(batch.get_balance() or 0)
+        self.balances.spans.append(
+            ft.TextSpan(total, style=ft.TextStyle(size=40, weight=ft.FontWeight.BOLD)))
 
         self.totals_row.bgcolor = 'orange'
 
@@ -173,8 +186,15 @@ class POSView(WuttaView):
             key = self.app.get_product_key_field()
             item_entry = str(getattr(product, key) or '') or uuid
 
+        try:
             row = handler.process_entry(batch, product or entry, quantity=quantity,
                                         item_entry=item_entry, user=user)
+        except Exception as error:
+            session.rollback()
+            self.show_snackbar(f"ERROR: {error}", bgcolor='yellow')
+            row = None
+
+        else:
 
             if row:
                 session.commit()
@@ -197,6 +217,7 @@ class POSView(WuttaView):
 
             session.commit()
             self.refresh_totals(batch)
+
         session.close()
         self.page.update()
         return bool(row)
@@ -562,6 +583,7 @@ class POSView(WuttaView):
         handler = self.get_batch_handler()
         self.tender_cash = handler.get_tender(session, 'cash')
         self.tender_check = handler.get_tender(session, 'check')
+        self.tender_foodstamp = handler.get_tender(session, 'foodstamp')
         session.expunge_all()
         session.close()
 
@@ -577,14 +599,19 @@ class POSView(WuttaView):
         )
 
         self.subtotals = ft.Text(spans=[])
-
+        self.fs_balance = ft.Text(spans=[])
-        self.txn_balance = ft.Text("", size=40, weight=ft.FontWeight.BOLD)
+        self.balances = ft.Text(spans=[])
 
         self.totals_row = ft.Container(
             ft.Row(
                 [
                     self.subtotals,
-                    self.txn_balance,
+                    ft.Row(
+                        [
+                            self.fs_balance,
+                            self.balances,
+                        ],
+                    ),
                 ],
                 alignment=ft.MainAxisAlignment.SPACE_BETWEEN,
             ),
@@ -705,6 +732,12 @@ class POSView(WuttaView):
                         ],
                         spacing=0,
                     ),
+                    ft.Row(
+                        [
+                            self.make_foodstamp_button(),
+                        ],
+                        spacing=0,
+                    ),
                 ],
                 spacing=0,
             ),
@@ -782,6 +815,7 @@ class POSView(WuttaView):
                                     self.context_menu,
                                     self.suspend_menu,
                                 ],
+                                vertical_alignment=ft.CrossAxisAlignment.START,
                             ),
                         ],
                     ),
@@ -829,23 +863,16 @@ class POSView(WuttaView):
         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 = {
+            'font_size': self.default_font_size,
             '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)
+        return self.make_button(info['tender_name'], **kw)
 
     def make_cash_button(self, **kwargs):
         cash = self.tender_cash or {'tender_code': 'CA',
@@ -857,6 +884,12 @@ class POSView(WuttaView):
                                       'tender_name': "Check"}
         return self.make_tender_button(check, **kwargs)
 
+    def make_foodstamp_button(self, **kwargs):
+        foodstamp = self.tender_foodstamp or {'tender_code': 'FS',
+                                              'tender_name': "Food Stamps"}
+        kwargs.setdefault('font_size', 34)
+        return self.make_tender_button(foodstamp, **kwargs)
+
     def make_suspend_button(self, **kwargs):
         return self.make_button("SUSPEND", bgcolor='purple',
                                 font_size=self.default_font_size,
@@ -1622,7 +1655,8 @@ class POSView(WuttaView):
         self.items.controls.clear()
 
         self.subtotals.spans.clear()
-        self.txn_balance.value = None
+        self.fs_balance.spans.clear()
+        self.balances.spans.clear()
         self.totals_row.bgcolor = None
 
         self.page.session.set('txn_display', None)