sale_usability: add a wizard to write discount on all lines

The wizard is available under the "Action" menu. It has an option to
apply only on product or service lines.

Add a button "Send ack by email" on confirmed sale.order

sale_usability/__init__.py

@@ -1 +1,2 @@
 from . import models
+from . import wizards

sale_usability/__manifest__.py

@@ -23,6 +23,8 @@
         'views/account_move.xml',
         'views/res_company.xml',
         "views/res_partner.xml",
+        'wizards/sale_invoice_discount_all_lines_view.xml',
+        'security/ir.model.access.csv',
         ],
     'installable': True,
 }

sale_usability/security/ir.model.access.csv

@@ -0,0 +1,3 @@
+id,name,model_id:id,group_id:id,perm_read,perm_write,perm_create,perm_unlink
+access_sale_invoice_discount_all_lines_sale,Full access on sale.invoice.discount.all.lines to Sale user,model_sale_invoice_discount_all_lines,sales_team.group_sale_salesman,1,1,1,1
+access_sale_invoice_discount_all_lines_invoice,Full access on sale.invoice.discount.all.lines to Invoice user,model_sale_invoice_discount_all_lines,account.group_account_invoice,1,1,1,1

sale_usability/views/sale_order.xml

@@ -32,6 +32,9 @@
         <xpath expr="//field[@name='order_line']/tree/field[@name='product_template_id']" position="after">
             <field name="product_barcode" optional="hide"/>
         </xpath>
+        <button name="action_quotation_send" attrs="{'invisible': ['|', ('state', '=', 'draft'), ('invoice_count','&gt;=',1)]}" position="before">
+            <button name="action_quotation_send" type="object" string="Send Order Acknowledgement" attrs="{'invisible': ['|', ('state', 'not in', ('sale', 'done')), ('invoice_count','&gt;=',1)]}"/>
+        </button>
     </field>
 </record>
 

sale_usability/wizards/__init__.py

@@ -0,0 +1 @@
+from . import sale_invoice_discount_all_lines

sale_usability/wizards/sale_invoice_discount_all_lines.py

@@ -0,0 +1,95 @@
+# Copyright 2022 Akretion France (http://www.akretion.com/)
+# @author: Alexis de Lattre <alexis.delattre@akretion.com>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from odoo import api, models, fields, _
+from odoo.tools import float_compare
+from odoo.exceptions import UserError
+
+
+class SaleInvoiceDiscountAllLines(models.TransientModel):
+    _name = 'sale.invoice.discount.all.lines'
+    _description = 'Apply discount on all lines of a sale order or invoice'
+
+    @api.model
+    def default_get(self, fields_list):
+        res = super().default_get(fields_list)
+        if self._context.get('active_id'):
+            if self._context.get('active_model') == 'sale.order':
+                res['sale_id'] = self._context['active_id']
+            elif self._context.get('active_model') == 'account.move':
+                res['move_id'] = self._context['active_id']
+                move = self.env['account.move'].browse(res['move_id'])
+                if move.state != 'draft':
+                    raise UserError(
+                        _("Invoice '%s' is not in draft state.")
+                        % self.move_id.display_name)
+            else:
+                # I don't translate this because it should never happen.
+                raise UserError(
+                    "This wizard can only work on a sale order or an invoice.")
+        else:
+            # I don't translate this because it should never happen.
+            raise UserError("Missing active_id in context. It should never happen.")
+        return res
+
+    sale_id = fields.Many2one(
+        'sale.order', string='Order', readonly=True)
+    move_id = fields.Many2one(
+        'account.move', string='Invoice', readonly=True)
+    discount = fields.Float(
+        string='Discount', digits='Discount', required=True)
+    line_type = fields.Selection([
+        ('all', 'All Lines'),
+        ('products', 'All Product Lines'),
+        ('services', 'All Service Lines'),
+        ], default='all', required=True, string='Apply on')
+
+    def run(self):
+        prec = self.env['decimal.precision'].precision_get('Discount')
+        if float_compare(self.discount, 0, precision_digits=prec) < 0:
+            raise UserError(_("Discount cannot be negative."))
+        if self.sale_id:
+            record = self.sale_id
+            line_obj = self.env['sale.order.line']
+            domain = [('order_id', '=', self.sale_id.id)]
+        elif self.move_id:
+            record = self.move_id
+            if self.move_id.state != 'draft':
+                raise UserError(_(
+                    "Invoice '%s' is not in draft state.") % self.move_id.display_name)
+            line_obj = self.env['account.move.line']
+            domain = [
+                ('move_id', '=', self.move_id.id),
+                ('exclude_from_invoice_tab', '=', False),
+                ]
+        else:
+            # I don't translate this because it should never happen.
+            raise UserError(
+                "The wizard is not linked to a sale order nor an invoice. "
+                "This should never happen.")
+        domain += [('display_type', '=', False)]
+        if self.line_type == 'products':
+            domain += [
+                ('product_id', '!=', False),
+                ('product_id.type', '!=', 'service'),
+                ]
+        elif self.line_type == 'services':
+            domain += [
+                ('product_id', '!=', False),
+                ('product_id.type', '=', 'service'),
+                ]
+        lines = line_obj.search(domain)
+        if not lines:
+            raise UserError(_("There are no lines to apply the discount on."))
+        lines.with_context(check_move_validity=False).write({'discount': self.discount})
+        if self.move_id:
+            self.move_id.with_context(
+                check_move_validity=False)._recompute_dynamic_lines(
+                    recompute_all_taxes=True)
+            self.move_id._check_balanced()
+        record.message_post(body=_(
+            "Applied a {discount}% discount on {line_type}.").format(
+                discount=self.discount,
+                line_type=self._fields['line_type'].convert_to_export(
+                    self.line_type, self)))

sale_usability/wizards/sale_invoice_discount_all_lines_view.xml

@@ -0,0 +1,52 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  Copyright 2022 Akretion France (http://www.akretion.com/)
+  @author: Alexis de Lattre <alexis.delattre@akretion.com>
+  License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+-->
+
+<odoo>
+
+<record id="sale_invoice_discount_all_lines_form" model="ir.ui.view">
+    <field name="model">sale.invoice.discount.all.lines</field>
+    <field name="arch"  type="xml">
+        <form>
+            <group name="main">
+                <field name="sale_id" attrs="{'invisible': [('sale_id', '=', False)]}"/>
+                <field name="move_id" attrs="{'invisible': [('move_id', '=', False)]}"/>
+                <label for="discount"/>
+                <div name="discount">
+                    <field name="discount" class="oe_inline"/> %%
+                </div>
+                <field name="line_type"/>
+            </group>
+            <footer>
+                <button name="run" type="object"
+                    class="btn-primary" string="Apply"/>
+                <button special="cancel" string="Cancel" class="btn-default"/>
+            </footer>
+        </form>
+    </field>
+</record>
+
+<record id="account_move_discount_all_lines_action" model="ir.actions.act_window">
+    <field name="name">Discount on all lines</field>
+    <field name="res_model">sale.invoice.discount.all.lines</field>
+    <field name="view_mode">form</field>
+    <field name="target">new</field>
+    <field name="groups_id" eval="[(4, ref('account.group_account_invoice'))]"/>
+    <field name="binding_model_id" ref="account.model_account_move" />
+    <field name="binding_view_types">form</field>
+</record>
+
+<record id="sale_order_discount_all_lines_action" model="ir.actions.act_window">
+    <field name="name">Discount on all lines</field>
+    <field name="res_model">sale.invoice.discount.all.lines</field>
+    <field name="view_mode">form</field>
+    <field name="target">new</field>
+    <field name="groups_id" eval="[(4, ref('sales_team.group_sale_salesman'))]"/>
+    <field name="binding_model_id" ref="sale.model_sale_order" />
+    <field name="binding_view_types">form</field>
+</record>
+
+</odoo>