Merge branch '3036-inv-wrong-time' into 'dev_cooperatic'

INV: save UTC time & display according to locale timezone (+ linting)

See merge request !177

shelfs/models.py

@@ -6,7 +6,7 @@ from products.models import CagetteProducts
 from inventory.models import CagetteInventory
 
 import os
-from datetime import date, datetime
+from datetime import date, datetime, timezone
 from openpyxl import Workbook
 from openpyxl.styles import Alignment, Font
 from statistics import *
@@ -196,7 +196,7 @@ class Shelf(models.Model):
 
     def set_begin_inventory_datetime(self):
         res = {}
-        now = datetime.now().isoformat()
+        now = datetime.now(timezone.utc).isoformat()  # save UTC time
         f = {'ongoing_inv_start_datetime': now}
 
         try:

shelfs/static/js/shelfs_index.js

@@ -29,6 +29,13 @@ function init_datatable() {
                     else {
                         var date = new Date(data);
 
+                        // Get local timezone offset in minutes
+                        const offset = date.getTimezoneOffset();
+
+                        // Add offset to saved time.
+                        // offset is negative if the local time zone is ahead of UTC.
+                        date.setTime(date.getTime() - offset * 60 * 1000);
+
                         return `${date.toLocaleDateString('fr-FR')} ${date.toLocaleTimeString('fr-FR')}`;
                     }
                 }