[IMP] hr_attendance: Display checked in hours today

Purpose
======
When an empoyee wants to check out, he does not know the number of hours he worked today.

Specification
==========
In the check out view, display how many hours the employee was checked in today.

closes odoo/odoo#33974

Signed-off-by: Yannick Tivisse (yti) <yti@odoo.com>

1 files changed, 24 insertions, 0 deletions

diff --git a/addons/hr_attendance/models/hr_employee.py b/addons/hr_attendance/models/hr_employee.py
index def4f72c2d4..c526230dc93 100644
--- a/addons/hr_attendance/models/hr_employee.py
+++ b/addons/hr_attendance/models/hr_employee.py
@@ -1,6 +1,7 @@
 # -*- coding: utf-8 -*-
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
 
+import pytz
 from datetime import datetime
 from dateutil.relativedelta import relativedelta
 
@@ -14,6 +15,7 @@ class HrEmployeeBase(models.AbstractModel):
     last_attendance_id = fields.Many2one('hr.attendance', compute='_compute_last_attendance_id', store=True)
     attendance_state = fields.Selection(string="Attendance Status", compute='_compute_attendance_state', selection=[('checked_out', "Checked out"), ('checked_in', "Checked in")])
     hours_last_month = fields.Float(compute='_compute_hours_last_month')
+    hours_today = fields.Float(compute='_compute_hours_today')
 
     def _compute_hours_last_month(self):
         for employee in self:
@@ -27,6 +29,28 @@ class HrEmployeeBase(models.AbstractModel):
             ])
             employee.hours_last_month = sum(attendances.mapped('worked_hours'))
 
+    def _compute_hours_today(self):
+        now = fields.Datetime.now()
+        now_utc = pytz.utc.localize(now)
+        for employee in self:
+            # start of day in the employee's timezone might be the previous day in utc
+            tz = pytz.timezone(employee.tz)
+            now_tz = now_utc.astimezone(tz)
+            start_tz = now_tz + relativedelta(hour=0, minute=0)  # day start in the employee's timezone
+            start_naive = start_tz.astimezone(pytz.utc).replace(tzinfo=None)
+
+            attendances = self.env['hr.attendance'].search([
+                ('employee_id', '=', employee.id),
+                ('check_in', '<=', now),
+                '|', ('check_out', '>=', start_naive), ('check_out', '=', False),
+            ])
+
+            worked_hours = 0
+            for attendance in attendances:
+                delta = (attendance.check_out or now) - max(attendance.check_in, start_naive)
+                worked_hours += delta.total_seconds() / 3600.0
+            employee.hours_today = worked_hours
+
     @api.depends('attendance_ids')
     def _compute_last_attendance_id(self):
         for employee in self: