feat: Add timezone support

ref: #248 #385 #388 nofusscomputing/centurion_erp_ui#4 nofusscomputing/centurion_erp_ui#26

app/app/middleware/timezone.py

@@ -0,0 +1,38 @@
+import zoneinfo
+
+from django.utils import timezone
+
+
+class TimezoneMiddleware:
+    def __init__(self, get_response):
+        self.get_response = get_response
+
+    def __call__(self, request):
+
+        def _activate_tz(tz):
+            timezone.activate(zoneinfo.ZoneInfo(tz))
+            
+        # tzname = request.session.get("django_timezone", None)
+
+        # if tzname:
+
+        #     _activate_tz(tzname)
+
+        # else:
+
+        user = request.user
+
+        if hasattr(user, 'user_settings'):
+
+            tzname = user.user_settings.all()[0].timezone
+
+            # set the cookie
+            # request.session['django_timezone'] = tzname
+
+            _activate_tz(tzname)
+
+        else:
+
+            timezone.deactivate()
+
+        return self.get_response(request)

app/app/settings.py

@@ -135,6 +135,7 @@ MIDDLEWARE = [
     'django.contrib.messages.middleware.MessageMiddleware',
     'django.middleware.clickjacking.XFrameOptionsMiddleware',
     'core.middleware.get_request.RequestMiddleware',
+    'app.middleware.timezone.TimezoneMiddleware',
 ]
 
 

app/settings/forms/user_settings.py

@@ -18,6 +18,7 @@ class UserSettingsForm(CommonModelForm):
 
         fields = [
             'default_organization',
+            'timezone',
         ]
 
         model = UserSettings

app/settings/models/user_settings.py

@@ -1,4 +1,7 @@
+import zoneinfo
+
 from django.contrib.auth.models import User
+from django.conf import settings
 from django.db import models
 from django.db.models.signals import post_save
 from django.dispatch import receiver
@@ -6,6 +9,14 @@ from django.dispatch import receiver
 from access.fields import *
 from access.models import Organization
 
+sorted_timezones = sorted(zoneinfo.available_timezones())
+
+TIMEZONES = tuple(zip(
+    sorted_timezones,
+    sorted_timezones
+))
+
+
 
 class UserSettingsCommonFields(models.Model):
 
@@ -46,6 +57,7 @@ class UserSettings(UserSettingsCommonFields):
         blank= False,
         help_text = 'User this Setting belongs to',
         on_delete=models.CASCADE,
+        related_name='user_settings',
         verbose_name = 'User'
     )
 
@@ -60,6 +72,14 @@ class UserSettings(UserSettingsCommonFields):
         verbose_name = 'Default Organization'
     )
 
+    timezone = models.CharField(
+        default='UTC',
+        choices=TIMEZONES,
+        help_text = 'What Timezone do you wish to have times displayed in',
+        max_length=32,
+        verbose_name = 'Your Timezone',
+    )
+
 
     def get_organization(self):
 

app/settings/templates/settings/user_settings.html.j2

@@ -43,6 +43,11 @@
                 <span>{{ settings.default_organization }}</span>
             </div>
 
+            <div class="detail-view-field">
+                <label>{{ form.timezone.label }}</label>
+                <span>{{ settings.timezone }}</span>
+            </div>
+
         </div>
         <div>
             <input type="button" value="Edit"