purchase_usability: add py3o_lines_layout()

purchase_usability/models/purchase_order.py

@@ -42,3 +42,32 @@ class PurchaseOrder(models.Model):
                     self.env, po.amount_untaxed, currency_obj=po.currency_id)
             result.append((po.id, name))
         return result
+
+    # for report
+    def py3o_lines_layout(self):
+        self.ensure_one()
+        res = []
+        has_sections = False
+        subtotal = 0.0
+        for line in self.order_line:
+            if line.display_type == 'line_section':
+                # insert line
+                if has_sections:
+                    res.append({'subtotal': subtotal})
+                subtotal = 0.0  # reset counter
+                has_sections = True
+            else:
+                if not line.display_type:
+                    subtotal += line.price_subtotal
+            res.append({'line': line})
+        if has_sections:  # insert last subtotal line
+            res.append({'subtotal': subtotal})
+        # res:
+        # [
+        #    {'line': sale_order_line(1) with display_type=='line_section'},
+        #    {'line': sale_order_line(2) without display_type},
+        #    {'line': sale_order_line(3) without display_type},
+        #    {'line': sale_order_line(4) with display_type=='line_note'},
+        #    {'subtotal': 8932.23},
+        # ]
+        return res