[IMP] hr: display warning when user is not linked to employee

On user form view, when no employee is linked to the user, we want
to display a message to the HR Officer (only) with the possibility
to create the employee profile with prefilled information.

Task-1916925

closes odoo/odoo#29659

Signed-off-by: Jérome Maes (jem) <jem@openerp.com>

addons/hr/models/res_users.py

@@ -48,6 +48,16 @@ class User(models.Model):
     additional_note = fields.Text(related='employee_id.additional_note', readonly=False, related_sudo=False)
     barcode = fields.Char(related='employee_id.barcode', readonly=False, related_sudo=False)
     pin = fields.Char(related='employee_id.pin', readonly=False, related_sudo=False)
+    employee_warning = fields.Char("Missing employee warning", compute='_compute_employee_warning')
+
+    @api.depends('groups_id', 'employee_ids', 'active')
+    def _compute_employee_warning(self):
+        """ Fill warning only for active internal user (employee) not linked to hr.employee """
+        for user in self:
+            if not user.employee_ids and not user.share and user.active:
+                user.employee_warning = _("Don't forget to create the linked employee.")
+            else:
+                user.employee_warning = False
 
     def __init__(self, pool, cr):
         """ Override of __init__ to add access rights.
@@ -163,3 +173,16 @@ class User(models.Model):
     def _compute_company_employee(self):
         for user in self:
             user.employee_id = self.env['hr.employee'].search([('id', 'in', user.employee_ids.ids), ('company_id', '=', user.company_id.id)], limit=1)
+
+    @api.multi
+    def action_create_employee(self):
+        self.ensure_one()
+        form_view = self.env.ref('hr.view_employee_form')
+        return {
+            'name': _('Create Employee'),
+            'type': 'ir.actions.act_window',
+            'res_model': 'hr.employee',
+            'views': [(form_view.id, 'form')],
+            'target': 'new',
+            'context': {'default_user_id': self.id}
+        }

addons/hr/views/res_users.xml

@@ -148,5 +148,19 @@
             <field name="view_mode">form</field>
             <field name="view_id" ref="hr.res_users_view_form_profile"/>
         </record>
+
+        <record id="res_users_view_form" model="ir.ui.view">
+            <field name="name">res.users.form.inherit</field>
+            <field name="model">res.users</field>
+            <field name="inherit_id" ref="base.view_users_form"/>
+            <field name="arch" type="xml">
+                <xpath expr="//field[@name='image']" position="before">
+                    <div groups="hr.group_hr_user" class="alert alert-danger text-center" role="alert" attrs="{'invisible': [('employee_warning', '=', False)]}">
+                        <a class="close" data-dismiss="alert" href="#">x</a>
+                        <field name="employee_warning" nolabel="1" class="oe_inline"/> <button class="oe_inline oe_link p-0" type="object" name="action_create_employee">Click here to create it.</button>.
+                    </div>
+                </xpath>
+            </field>
+        </record>
     </data>
 </odoo>