Major refactor of commerce and Stripe integration

Refactored commerce models to support refunds, invoices, and improved carrier/payment logic. Added new serializers and viewsets for products, categories, images, discount codes, and refunds. Introduced Stripe client integration and removed legacy Stripe admin/model code. Updated Dockerfile for PDF generation dependencies. Removed obsolete migration files and updated configuration app initialization. Added invoice template and tasks for order cleanup.

backend/thirdparty/stripe/models.py

@@ -1,25 +1,68 @@
 from django.db import models
+from django.apps import apps
 
 # Create your models here.
 
 #TODO: logika a interakce bude na stripu (třeba aktualizovaní objednávky na zaplacenou apod.)
-    
-class StripePayment(models.Model):
-    STATUS_CHOICES = [
-        ("pending", "Pending"),
-        ("paid", "Paid"),
-        ("failed", "Failed"),
-        ("cancelled", "Cancelled"),
-    ]
 
-    amount = models.DecimalField(max_digits=10, decimal_places=2)
-    currency = models.CharField(max_length=10, default="czk")
-    status = models.CharField(max_length=20, choices=STATUS_CHOICES, default="pending")
+from .client import StripeClient
+    
+class StripeModel(models.Model):
+    class STATUS_CHOICES(models.TextChoices):
+        PENDING = "pending", "Čeká se na platbu"
+        PAID = "paid", "Zaplaceno"
+        FAILED = "failed", "Neúspěšné"
+        CANCELLED = "cancelled", "Zrušeno"
+        REFUNDING = "refunding", "Platba se vrací"
+        REFUNDED = "refunded", "Platba úspěšně vrácena"
+    
+    status = models.CharField(max_length=20, choices=STATUS_CHOICES.choices, default=STATUS_CHOICES.PENDING)
 
     stripe_session_id = models.CharField(max_length=255, blank=True, null=True)
     stripe_payment_intent = models.CharField(max_length=255, blank=True, null=True)
+    stripe_session_url = models.URLField(blank=True, null=True)
     
     created_at = models.DateTimeField(auto_now_add=True)
+    updated_at = models.DateTimeField(auto_now=True, null=True, blank=True)
 
     def __str__(self):
-        return f"Order {self.id} - {self.status}"
+        return f"Order {self.id} - {self.status}"
+    
+    
+    
+    def save(self, *args, **kwargs):
+        #if new
+        if self.pk:
+            Order = apps.get_model('commerce', 'Order')
+            Payment = apps.get_model('commerce', 'Payment')
+
+            order = Order.objects.get(payment=Payment.objects.get(stripe=self))
+
+            session = StripeClient.create_checkout_session(order)# <-- předáme self.StripePayment
+
+            self.stripe_session_id = session.id
+            self.stripe_payment_intent = session.payment_intent
+            self.stripe_session_url = session.url
+
+        else:
+            self.updated_at = models.DateTimeField(auto_now=True)
+        
+        super().save(*args, **kwargs)
+
+    def paid(self):
+        self.status = self.STATUS_CHOICES.PAID
+        self.save()
+
+    def refund(self):
+        StripeClient.refund_order(self.stripe_payment_intent)
+        self.status = self.STATUS_CHOICES.REFUNDING
+        self.save()
+
+    def refund_confirmed(self):
+        self.status = self.STATUS_CHOICES.REFUNDED
+        self.save()
+
+    def cancel(self):
+        StripeClient.cancel_checkout_session(self.stripe_session_id)
+        self.status = self.STATUS_CHOICES.CANCELLED
+        self.save()