Add Bill template

modules/purchase_trade/sale.py

@@ -598,7 +598,7 @@ class Sale(metaclass=PoolMeta):
             return '\n'.join(periods)
         return ''
     
-    @property
+    @property
     def report_payment_date(self):
         line = self._get_report_first_line()
         if line:
@@ -609,6 +609,51 @@ class Sale(metaclass=PoolMeta):
             if payment_date:
                 payment_date = format_date_en(payment_date)
                 return payment_date
+
+    def _get_report_bill_amount(self):
+        invoices = [
+            invoice for invoice in (self.invoices or [])
+            if getattr(invoice, 'state', None) != 'cancelled'
+        ]
+        if invoices:
+            invoice = sorted(
+                invoices,
+                key=lambda i: (
+                    getattr(i, 'invoice_date', None) or datetime.date.min,
+                    getattr(i, 'id', 0)))[0]
+            return Decimal(str(getattr(invoice, 'total_amount', 0) or 0))
+        return Decimal(str(self.total_amount or 0))
+
+    @property
+    def report_bill_amount(self):
+        return self._get_report_bill_amount()
+
+    @property
+    def report_bill_amount_words(self):
+        value = self._get_report_bill_amount()
+        if self.currency and (self.currency.rec_name or '').upper() == 'USC':
+            return amount_to_currency_words(value, 'USC', 'USC')
+        return amount_to_currency_words(value)
+
+    @property
+    def report_bill_maturity_date(self):
+        maturity_dates = []
+        for invoice in (self.invoices or []):
+            if getattr(invoice, 'state', None) == 'cancelled':
+                continue
+            for line in (invoice.lines_to_pay or []):
+                if getattr(line, 'maturity_date', None):
+                    maturity_dates.append(line.maturity_date)
+        if maturity_dates:
+            return min(maturity_dates)
+
+        if self.lc_date:
+            return self.lc_date
+
+        line = self._get_report_first_line()
+        if line and self.payment_term and self.payment_term.lines:
+            Date = Pool().get('ir.date')
+            return self.payment_term.lines[0].get_date(Date.today(), line)
         
     @property
     def report_shipment(self):