mail_usability: add intermediary level to notify_email parameter of res.partner

mail_usability/__init__.py

@@ -1 +1,3 @@
 # -*- coding: utf-8 -*-
+
+from . import mail

mail_usability/__manifest__.py

@@ -20,6 +20,7 @@ Small usability improvements on mails:
 
 * remove 'sent by' in notification footer
 
+* add a new entry *All Messages Except Notifications* to the field *Receive Inbox Notifications by Email* of partners (becomes the default value)
     """,
     'author': 'Akretion',
     'website': 'http://www.akretion.com',

mail_usability/mail.py

@@ -0,0 +1,43 @@
+# -*- coding: utf-8 -*-
+# Copyright (C) 2016-2017 Akretion (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 models, fields, api
+
+
+class ResPartner(models.Model):
+    _inherit = 'res.partner'
+
+    notify_email = fields.Selection(
+        selection_add=[
+            ('all_except_notification', 'All Messages Except Notifications')],
+        default='all_except_notification')
+
+    @api.multi
+    def _notify(
+            self, message, force_send=False, send_after_commit=True,
+            user_signature=True):
+        if message.message_type == 'notification':
+            message_sudo = message.sudo()
+            email_channels = message.channel_ids.filtered(
+                lambda channel: channel.email_send)
+            bad_email = message_sudo.author_id and\
+                message_sudo.author_id.email or message.email_from
+            self.sudo().search([
+                '|',
+                ('id', 'in', self.ids),
+                ('channel_ids', 'in', email_channels.ids),
+                ('email', '!=', bad_email),
+                ('notify_email', '=', 'always')])._notify_by_email(
+                    message, force_send=force_send,
+                    send_after_commit=send_after_commit,
+                    user_signature=user_signature)
+            self._notify_by_chat(message)
+            return True
+        else:
+            return super(ResPartner, self)._notify(
+                message, force_send=force_send,
+                send_after_commit=send_after_commit,
+                user_signature=user_signature)