[FIX] point_of_sale: Sales Details timezone

The Sales Details report wizard gives the possibility
to print the details of the POS orders between two dates.

The fields in the wizard are of type `date`,
while the orders dates are of type `datetime`.

`00:00:00` and `23:59:59` were naively added
to the `date_start` and `date_end` (respectively) to
handle the case.

But, this doesn't take care of the user time zone:
When a user choose between February 24th and February 25th,
it's within his time zone, and therefore, for the search,
where the datetime are in UTC, adding `00:00:00` isn't enough,
the dates have to be converted from the user time zone
to UTC.

opw-6698831

addons/point_of_sale/report/pos_details.py

@@ -19,7 +19,10 @@
 #
 ##############################################################################
 
+import datetime
+import pytz
 import time
+from openerp import tools
 from openerp.report import report_sxw
 
 class pos_details(report_sxw.rml_parse):
@@ -44,7 +47,22 @@ class pos_details(report_sxw.rml_parse):
         result = {}
         user_ids = form['user_ids'] or self._get_all_users()
         company_id = user_obj.browse(self.cr, self.uid, self.uid).company_id.id
-        pos_ids = pos_obj.search(self.cr, self.uid, [('date_order','>=',form['date_start'] + ' 00:00:00'),('date_order','<=',form['date_end'] + ' 23:59:59'),('user_id','in',user_ids),('state','in',['done','paid','invoiced']),('company_id','=',company_id)])
+        user = self.pool['res.users'].browse(self.cr, self.uid, self.uid) or self.localcontext.get('tz') or 'UTC'
+        tz_name = user.tz
+        user_tz = pytz.timezone(tz_name)
+        between_dates = {}
+        for date_field, delta in {'date_start': {'days': 0}, 'date_end': {'days': 1}}.items():
+            timestamp = datetime.datetime.strptime(form[date_field] + ' 00:00:00', tools.DEFAULT_SERVER_DATETIME_FORMAT) + datetime.timedelta(**delta)
+            timestamp = user_tz.localize(timestamp).astimezone(pytz.utc)
+            between_dates[date_field] = timestamp.strftime(tools.DEFAULT_SERVER_DATETIME_FORMAT)
+
+        pos_ids = pos_obj.search(self.cr, self.uid, [
+            ('date_order', '>=', between_dates['date_start']),
+            ('date_order', '<', between_dates['date_end']),
+            ('user_id', 'in', user_ids),
+            ('state', 'in', ['done', 'paid', 'invoiced']),
+            ('company_id', '=', company_id)
+        ])
         for pos in pos_obj.browse(self.cr, self.uid, pos_ids):
             for pol in pos.lines:
                 result = {