[IMP] portal: add portal.mixin for portal access records

This mixin holds the replacement for website_published.mixin
website_url field. This field is called portal_url to avoid confusion
with the website and enforce the new portal use.

It also contains get_share_url method that will be used to generate
the URL to use in emails or various communication for customers.

addons/portal/__init__.py

@@ -2,4 +2,5 @@
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
 
 from . import controllers
+from . import models
 from . import wizard

addons/portal/models/__init__.py

@@ -0,0 +1,4 @@
+# -*- coding: utf-8 -*-
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+from . import portal_mixin

addons/portal/models/portal_mixin.py

@@ -0,0 +1,32 @@
+# -*- coding: utf-8 -*-
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+from werkzeug.urls import url_encode
+
+from odoo import api, fields, models
+
+
+class PortalMixin(models.AbstractModel):
+    _name = "portal.mixin"
+
+    portal_url = fields.Char(
+        'Portal Access URL', compute='_compute_portal_url',
+        help='Customer Portal URL')
+
+    @api.multi
+    def _compute_portal_url(self):
+        for record in self:
+            record.portal_url = '#'
+
+    def get_share_url(self):
+        self.ensure_one()
+        params = {
+            'model': self._name,
+            'res_id': self.id,
+        }
+        if hasattr(self, 'access_token') and self.access_token:
+            params['access_token'] = self.access_token
+        if hasattr(self, 'partner_id') and self.partner_id:
+            params.update(self.partner_id.signup_get_auth_param()[self.partner_id.id])
+
+        return '/mail/view?' + url_encode(params)