Add has_discount on SO + method for py3o report

sale_usability/sale.py

@@ -2,7 +2,9 @@
 #    Copyright (C) 2015 Akretion (http://www.akretion.com)
 #    @author Alexis de Lattre <alexis.delattre@akretion.com>
 
-from odoo import models, fields
+from odoo import models, fields, api
+from odoo.tools import float_is_zero
+from itertools import groupby
 
 
 class SaleOrder(models.Model):
@@ -17,7 +19,60 @@ class SaleOrder(models.Model):
     pricelist_id = fields.Many2one(track_visibility='onchange')
     payment_term_id = fields.Many2one(track_visibility='onchange')
     fiscal_position_id = fields.Many2one(track_visibility='onchange')
+    # for reports
+    has_discount = fields.Boolean(
+        compute='_compute_has_discount', readonly=True)
 
+    @api.multi
+    def _compute_has_discount(self):
+        prec = self.env['decimal.precision'].precision_get('Discount')
+        for order in self:
+            has_discount = False
+            for line in order.order_line:
+                if not float_is_zero(line.discount, precision_digits=prec):
+                    has_discount = True
+                    break
+            order.has_discount = has_discount
+
+    # for report
+    @api.multi
+    def py3o_lines_layout(self):
+        self.ensure_one()
+        res1 = []
+        # [
+        #    {'categ': categ(6), 'lines': [l1, l2], 'subtotal': 23.32},
+        #    {'categ': categ(1), 'lines': [l3, l4, l5], 'subtotal': 12.42},
+        # ]
+        for categ, lines in groupby(self.order_line, lambda l: l.layout_category_id):
+            entry = {'lines': [], 'categ': categ}
+            if categ.subtotal:
+                entry['subtotal'] = 0.0
+            for line in lines:
+                entry['lines'].append(line)
+                if 'subtotal' in entry:
+                    entry['subtotal'] += line.price_subtotal
+            res1.append(entry)
+        res2 = []
+        if len(res1) == 1 and not res1[0]['categ']:
+            # No category at all
+            for l in res1[0]['lines']:
+                res2.append({'line': l})
+        else:
+            # TODO : gérer qd il n'y a pas de categ
+            for ldict in res1:
+                res2.append({'categ': ldict['categ']})
+                for soline in ldict['lines']:
+                    res2.append({'line': soline})
+                if 'subtotal' in ldict:
+                    res2.append({'subtotal': ldict['subtotal']})
+        # res2:
+        # [
+        #    {'categ': categ(1)},
+        #    {'line': sale_order_line(2)},
+        #    {'line': sale_order_line(3)},
+        #    {'subtotal': 8932.23},
+        # ]
+        return res2
 
 class ProcurementGroup(models.Model):
     _inherit = 'procurement.group'