[IMP] website_sale_coupon: garbage collect old order coupon

With this commit, when an ecommerce order is judged abandonned (more than 4
days without being touched, and in draft), we remove its coupon so it is
available again.

task-2058666

closes odoo/odoo#37441

Signed-off-by: Jérémy Kersten (jke) <jke@openerp.com>

4 files changed, 112 insertions, 6 deletions

diff --git a/addons/website_sale_coupon/models/__init__.py b/addons/website_sale_coupon/models/__init__.py
index 28c756b4fed..d31916a0b3c 100644
--- a/addons/website_sale_coupon/models/__init__.py
+++ b/addons/website_sale_coupon/models/__init__.py
@@ -1,5 +1,6 @@
 # -*- coding: utf-8 -*-
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
 
+from . import ir_autovacuum
 from . import sale_coupon_program
 from . import sale_order
diff --git a/addons/website_sale_coupon/models/ir_autovacuum.py b/addons/website_sale_coupon/models/ir_autovacuum.py
new file mode 100644
index 00000000000..62b8b18cc48
--- /dev/null
+++ b/addons/website_sale_coupon/models/ir_autovacuum.py
@@ -0,0 +1,13 @@
+# -*- coding: utf-8 -*-
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+from odoo import api, models
+
+
+class AutoVacuum(models.AbstractModel):
+    _inherit = 'ir.autovacuum'
+
+    @api.model
+    def power_on(self, *args, **kwargs):
+        self.env['sale.order']._garbage_collector(*args, **kwargs)
+        return super(AutoVacuum, self).power_on(*args, **kwargs)
diff --git a/addons/website_sale_coupon/models/sale_order.py b/addons/website_sale_coupon/models/sale_order.py
index 574e355455b..e9e07575bb2 100644
--- a/addons/website_sale_coupon/models/sale_order.py
+++ b/addons/website_sale_coupon/models/sale_order.py
@@ -1,5 +1,7 @@
 # -*- coding: utf-8 -*-
-from odoo import models, fields, api
+from datetime import timedelta
+
+from odoo import api, fields, models
 from odoo.http import request
 
 
@@ -50,7 +52,6 @@ class SaleOrder(models.Model):
                     })
                     order.website_order_line -= program_lines
 
-
     def _compute_cart_info(self):
         super(SaleOrder, self)._compute_cart_info()
         for order in self:
@@ -75,3 +76,20 @@ class SaleOrder(models.Model):
             return self.env['sale.order.line']
         free_shipping_product_ids = free_shipping_prgs_ids.mapped('discount_line_product_id')
         return self.order_line.filtered(lambda l: l.product_id in free_shipping_product_ids)
+
+    @api.model
+    def _garbage_collector(self, *args, **kwargs):
+        """Remove/free coupon from abandonned ecommerce order."""
+        ICP = self.env['ir.config_parameter']
+        validity = ICP.get_param('website_sale_coupon.abandonned_coupon_validity', 4)
+        validity = fields.Datetime.to_string(fields.datetime.now() - timedelta(days=int(validity)))
+        coupon_to_reset = self.env['sale.coupon'].search([
+            ('state', '=', 'used'),
+            ('sales_order_id.state', '=', 'draft'),
+            ('sales_order_id.write_date', '<', validity),
+            ('sales_order_id.website_id', '!=', False),
+        ])
+        for coupon in coupon_to_reset:
+            coupon.sales_order_id.applied_coupon_ids -= coupon
+        coupon_to_reset.write({'state': 'new'})
+        coupon_to_reset.mapped('sales_order_id').recompute_coupon_lines()
diff --git a/addons/website_sale_coupon/tests/test_shop_sale_coupon.py b/addons/website_sale_coupon/tests/test_shop_sale_coupon.py
index 76df76157a1..8cb5377ade3 100644
--- a/addons/website_sale_coupon/tests/test_shop_sale_coupon.py
+++ b/addons/website_sale_coupon/tests/test_shop_sale_coupon.py
@@ -1,15 +1,14 @@
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
+from datetime import timedelta
 
-from odoo.tests import HttpCase, tagged
+from odoo import fields
+from odoo.tests import HttpCase, tagged, TransactionCase
 from odoo.addons.sale.tests.test_sale_product_attribute_value_config import TestSaleProductAttributeValueSetup
 
 
 @tagged('post_install', '-at_install')
 class TestUi(TestSaleProductAttributeValueSetup, HttpCase):
 
-    post_install = True
-    at_install = False
-
     def setUp(self):
         super(TestUi, self).setUp()
 
@@ -22,3 +21,78 @@ class TestUi(TestSaleProductAttributeValueSetup, HttpCase):
         # pre enable "Show # found" option to avoid race condition...
         self.env.ref("website_sale.search_count_box").write({"active": True})
         self.start_tour("/", 'shop_sale_coupon', login="admin")
+
+
+@tagged('post_install', '-at_install')
+class TestWebsiteSaleCoupon(TransactionCase):
+
+    def setUp(self):
+        super(TestWebsiteSaleCoupon, self).setUp()
+        program = self.env['sale.coupon.program'].create({
+            'name': '10% TEST Discount',
+            'promo_code_usage': 'code_needed',
+            'discount_apply_on': 'on_order',
+            'discount_type': 'percentage',
+            'discount_percentage': 10.0,
+            'program_type': 'coupon_program',
+        })
+
+        self.env['sale.coupon.generate'].with_context(active_id=program.id).create({}).generate_coupon()
+        self.coupon = program.coupon_ids[0]
+
+        self.steve = self.env['res.partner'].create({
+            'name': 'Steve Bucknor',
+            'email': 'steve.bucknor@example.com',
+        })
+        self.empty_order = self.env['sale.order'].create({
+            'partner_id': self.steve.id
+        })
+
+    def test_01_gc_coupon(self):
+        # 1. Simulate a frontend order (website, product)
+        order = self.empty_order
+        order.website_id = self.env['website'].browse(1)
+        self.env['sale.order.line'].create({
+            'product_id': self.env['product.product'].create({
+                'name': 'Product A',
+                'list_price': 100,
+                'sale_ok': True,
+            }).id,
+            'name': 'Product A',
+            'product_uom_qty': 2.0,
+            'order_id': order.id,
+        })
+
+        # 2. Apply the coupon
+        self.env['sale.coupon.apply.code'].with_context(active_id=order.id).create({
+            'coupon_code': self.coupon.code
+        }).process_coupon()
+        order.recompute_coupon_lines()
+
+        self.assertEqual(len(order.applied_coupon_ids), 1, "The coupon should've been applied on the order")
+        self.assertEqual(self.coupon, order.applied_coupon_ids)
+        self.assertEqual(self.coupon.state, 'used')
+
+        # 3. Test recent order -> Should not be removed
+        order._garbage_collector()
+
+        self.assertEqual(len(order.applied_coupon_ids), 1, "The coupon shouldn't have been removed from the order no more than 4 days")
+        self.assertEqual(self.coupon.state, 'used', "Should not have been changed")
+
+        # 4. Test order not older than ICP validity -> Should not be removed
+        ICP = self.env['ir.config_parameter']
+        icp_validity = ICP.create({'key': 'website_sale_coupon.abandonned_coupon_validity', 'value': 5})
+        order.flush()
+        query = """UPDATE %s SET write_date = %%s WHERE id = %%s""" % (order._table,)
+        self.env.cr.execute(query, (fields.Datetime.to_string(fields.datetime.now() - timedelta(days=4, hours=2)), order.id))
+        order._garbage_collector()
+
+        self.assertEqual(len(order.applied_coupon_ids), 1, "The coupon shouldn't have been removed from the order the order is 4 days old but icp validity is 5 days")
+        self.assertEqual(self.coupon.state, 'used', "Should not have been changed (2)")
+
+        # 5. Test order with no ICP and older then 4 default days -> Should be removed
+        icp_validity.unlink()
+        order._garbage_collector()
+
+        self.assertEqual(len(order.applied_coupon_ids), 0, "The coupon should've been removed from the order as more than 4 days")
+        self.assertEqual(self.coupon.state, 'new', "Should have been reset.")