Introduce notifications app and integrate emails

Add a new notifications app (models, serializers, views, admin, tasks, consumers, routing, urls, tests) with Notification.notify for in-app websocket pushes and optional email delivery. Centralize email sending in notifications.tasks.send_email_with_context and re-export it from account.tasks for compatibility. Update account and commerce and advertisement tasks to use Notification.notify/_notify_order and the new email helper; adjust order/notification tasks to consolidate logic. Wire notifications into ASGI routing, settings and URL conf. Misc: handle OSError when importing weasyprint, add tmp/ to .gitignore, add local .claude PowerShell checks, add social.blog skeleton, and remove legacy ews-component test files.

backend/commerce/models.py

@@ -11,7 +11,7 @@ from django.core.validators import MaxValueValidator, MinValueValidator, validat
 
 try:
     from weasyprint import HTML
-except ImportError:
+except (ImportError, OSError):
     HTML = None
 
 import os

backend/commerce/tasks.py

@@ -1,182 +1,157 @@
-from account.tasks import send_email_with_context
 from celery import shared_task
-
 from django.apps import apps
 from django.utils import timezone
 
+from notifications.models import Notification
+from notifications.tasks import send_email_with_context
+
+
+def _notify_order(order, title, text, template_path, action_url=None):
+    """Send in-app notification + email for logged-in users, email-only for guests."""
+    if order.user:
+        Notification.notify(
+            user=order.user,
+            title=title,
+            text=text,
+            notification_type=Notification.Type.ORDER,
+            action_url=action_url or f"/objednavky/{order.id}/",
+            template_path=template_path,
+            email_context={"order": order},
+        )
+    else:
+        send_email_with_context(
+            recipients=order.email,
+            subject=title,
+            template_path=template_path,
+            context={"order": order},
+        )
+
 
 # -- CLEANUP TASKS --
 
-# Delete expired/cancelled orders (older than 24 hours)
 @shared_task
 def delete_expired_orders():
     Order = apps.get_model('commerce', 'Order')
-
-    expired_orders = Order.objects.filter(status=Order.OrderStatus.CANCELLED, created_at__lt=timezone.now() - timezone.timedelta(hours=24))
+    expired_orders = Order.objects.filter(
+        status=Order.OrderStatus.CANCELLED,
+        created_at__lt=timezone.now() - timezone.timedelta(hours=24),
+    )
     count = expired_orders.count()
     expired_orders.delete()
     return count
 
 
-# -- NOTIFICATIONS CARRIER --
+# -- CARRIER NOTIFICATIONS --
 
-# Zásilkovna
 @shared_task
-def notify_zasilkovna_sended(order = None, **kwargs):
+def notify_zasilkovna_sended(order=None, **kwargs):
     if not order:
-        raise ValueError("Order must be provided for notification.")
-    
-    if kwargs:
-        print("Additional kwargs received in notify_zasilkovna_sended:", kwargs)
-    
-    send_email_with_context(
-        recipients=order.email,
-        subject="Your order has been shipped",
+        raise ValueError("Order must be provided.")
+    _notify_order(
+        order,
+        title="Vaše objednávka byla odeslána",
+        text=f"Objednávka #{order.id} byla předána přepravci Zásilkovna.",
         template_path="email/shipping/zasilkovna/zasilkovna_sended.html",
-        context={
-            "order": order,
-        })
+    )
 
 
-# Shop
 @shared_task
-def notify_Ready_to_pickup(order = None, **kwargs):
+def notify_Ready_to_pickup(order=None, **kwargs):
     if not order:
-        raise ValueError("Order must be provided for notification.")
-    
-    if kwargs:
-        print("Additional kwargs received in notify_Ready_to_pickup:", kwargs)
-    
-    send_email_with_context(
-        recipients=order.email,
-        subject="Your order is ready for pickup",
+        raise ValueError("Order must be provided.")
+    _notify_order(
+        order,
+        title="Vaše objednávka je připravena k vyzvednutí",
+        text=f"Objednávka #{order.id} čeká na vyzvednutí na prodejně.",
         template_path="email/shipping/ready_to_pickup/ready_to_pickup.html",
-        context={
-            "order": order,
-        })
+    )
 
 
-# -- NOTIFICATIONS ORDER --
+# -- ORDER NOTIFICATIONS --
 
 @shared_task
-def notify_order_successfuly_created(order = None, **kwargs):
+def notify_order_successfuly_created(order=None, **kwargs):
     if not order:
-        raise ValueError("Order must be provided for notification.")
-    
-    if kwargs:
-        print("Additional kwargs received in notify_order_successfuly_created:", kwargs)
-    
-    send_email_with_context(
-        recipients=order.email,
-        subject="Your order has been successfully created",
+        raise ValueError("Order must be provided.")
+    _notify_order(
+        order,
+        title="Objednávka byla úspěšně vytvořena",
+        text=f"Vaše objednávka #{order.id} byla přijata a čeká na zpracování.",
         template_path="email/order_created.html",
-        context={
-            "order": order,
-        })
+    )
 
 
 @shared_task
-def notify_order_payed(order = None, **kwargs):
+def notify_order_payed(order=None, **kwargs):
     if not order:
-        raise ValueError("Order must be provided for notification.")
-    
-    if kwargs:
-        print("Additional kwargs received in notify_order_payed:", kwargs)
-    
-    send_email_with_context(
-        recipients=order.email,
-        subject="Your order has been paid",
+        raise ValueError("Order must be provided.")
+    _notify_order(
+        order,
+        title="Platba objednávky přijata",
+        text=f"Platba za objednávku #{order.id} byla úspěšně přijata.",
         template_path="email/order_paid.html",
-        context={
-            "order": order,
-        })
+    )
 
 
 @shared_task
-def notify_about_missing_payment(order = None, **kwargs):
+def notify_about_missing_payment(order=None, **kwargs):
     if not order:
-        raise ValueError("Order must be provided for notification.")
-    
-    if kwargs:
-        print("Additional kwargs received in notify_about_missing_payment:", kwargs)
-    
-    send_email_with_context(
-        recipients=order.email,
-        subject="Payment missing for your order",
+        raise ValueError("Order must be provided.")
+    _notify_order(
+        order,
+        title="Nezaplacená objednávka",
+        text=f"Objednávka #{order.id} dosud nebyla zaplacena. Dokončete platbu co nejdříve.",
         template_path="email/order_missing_payment.html",
-        context={
-            "order": order,
-        })
+    )
 
 
-# -- NOTIFICATIONS REFUND --
+# -- REFUND NOTIFICATIONS --
 
 @shared_task
-def notify_refund_items_arrived(order = None, **kwargs):
+def notify_refund_items_arrived(order=None, **kwargs):
     if not order:
-        raise ValueError("Order must be provided for notification.")
-    
-    if kwargs:
-        print("Additional kwargs received in notify_refund_items_arrived:", kwargs)
-    
-    send_email_with_context(
-        recipients=order.email,
-        subject="Your refund items have arrived",
+        raise ValueError("Order must be provided.")
+    _notify_order(
+        order,
+        title="Vrácené zboží přijato",
+        text=f"Vrácené zboží k objednávce #{order.id} bylo přijato. Reklamace bude zpracována.",
         template_path="email/order_refund_items_arrived.html",
-        context={
-            "order": order,
-        })
+    )
 
 
-# Refund accepted, returning money
 @shared_task
-def notify_refund_accepted(order = None, **kwargs):
+def notify_refund_accepted(order=None, **kwargs):
     if not order:
-        raise ValueError("Order must be provided for notification.")
-    
-    if kwargs:
-        print("Additional kwargs received in notify_refund_accepted:", kwargs)
-    
-    send_email_with_context(
-        recipients=order.email,
-        subject="Your refund has been accepted",
+        raise ValueError("Order must be provided.")
+    _notify_order(
+        order,
+        title="Vrácení peněz schváleno",
+        text=f"Vaše reklamace k objednávce #{order.id} byla schválena. Peníze budou vráceny.",
         template_path="email/order_refund_accepted.html",
-        context={
-            "order": order,
-        })
+    )
 
 
-# -- NOTIFICATIONS ORDER STATUS --
+# -- ORDER STATUS NOTIFICATIONS --
 
 @shared_task
-def notify_order_cancelled(order = None, **kwargs):
+def notify_order_cancelled(order=None, **kwargs):
     if not order:
-        raise ValueError("Order must be provided for notification.")
-    
-    if kwargs:
-        print("Additional kwargs received in notify_order_cancelled:", kwargs)
-    
-    send_email_with_context(
-        recipients=order.email,
-        subject="Your order has been cancelled",
+        raise ValueError("Order must be provided.")
+    _notify_order(
+        order,
+        title="Objednávka zrušena",
+        text=f"Objednávka #{order.id} byla zrušena.",
         template_path="email/order_cancelled.html",
-        context={
-            "order": order,
-        })
+    )
 
 
 @shared_task
-def notify_order_completed(order = None, **kwargs):
+def notify_order_completed(order=None, **kwargs):
     if not order:
-        raise ValueError("Order must be provided for notification.")
-    
-    if kwargs:
-        print("Additional kwargs received in notify_order_completed:", kwargs)
-    
-    send_email_with_context(
-        recipients=order.email,
-        subject="Your order has been completed",
+        raise ValueError("Order must be provided.")
+    _notify_order(
+        order,
+        title="Objednávka dokončena",
+        text=f"Vaše objednávka #{order.id} byla úspěšně dokončena. Děkujeme za nákup!",
         template_path="email/order_completed.html",
-        context={
-            "order": order,
-        })
+    )