integrace api, stripe, vytvoření commecre app

backend/commerce/admin.py

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+from django.contrib import admin
+from .models import Carrier, Order
+# Register your models here.
+
+
+@admin.register(Carrier)
+class CarrierAdmin(admin.ModelAdmin):
+    list_display = ("name", "price", "api_id")
+    search_fields = ("name", "api_id")
+
+
+@admin.register(Order)
+class OrderAdmin(admin.ModelAdmin):
+    list_display = ("id", "product", "carrier", "quantity", "total_price", "status", "created_at")
+    list_filter = ("status", "created_at")
+    search_fields = ("stripe_session_id",)
+    readonly_fields = ("total_price", "status", "stripe_session_id", "created_at", "updated_at")

backend/commerce/apps.py

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+from django.apps import AppConfig
+
+
+class CommerceConfig(AppConfig):
+    default_auto_field = 'django.db.models.BigAutoField'
+    name = 'commerce'

backend/commerce/models.py

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+from django.db import models
+
+class Product(models.Model):
+    name = models.CharField(max_length=200)
+    description = models.TextField(blank=True)
+    price = models.DecimalField(max_digits=10, decimal_places=2)
+    currency = models.CharField(max_length=10, default="czk")
+    stock = models.PositiveIntegerField(default=0)
+    is_active = models.BooleanField(default=True)
+    default_carrier = models.ForeignKey(
+        "Carrier", on_delete=models.SET_NULL, null=True, blank=True, related_name="default_for_products"
+    )
+    created_at = models.DateTimeField(auto_now_add=True)
+
+    @property
+    def available(self):
+        return self.is_active and self.stock > 0
+
+    def __str__(self):
+        return f"{self.name} ({self.price} {self.currency.upper()})"
+
+
+# Dopravci a způsoby dopravy
+from django.db import models
+
+class Carrier(models.Model):
+    name = models.CharField(max_length=100)  # název dopravce (Zásilkovna, Česká pošta…)
+    base_price = models.DecimalField(max_digits=10, decimal_places=2, default=0)  # základní cena dopravy
+    delivery_time = models.CharField(max_length=100, blank=True)  # např. "2–3 pracovní dny"
+    is_active = models.BooleanField(default=True)
+
+    # pole pro logo
+    logo = models.ImageField(upload_to="carriers/", blank=True, null=True)
+
+    # pole pro propojení s externím API (např. ID služby u Zásilkovny)
+    external_id = models.CharField(max_length=50, blank=True, null=True)
+
+    def __str__(self):
+        return f"{self.name} ({self.base_price} Kč)"
+

backend/commerce/serializers.py

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+from rest_framework import serializers
+from .models import Carrier
+
+class CarrierSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = Carrier
+        fields = [
+            "id", "name", "base_price", "delivery_time",
+            "is_active", "logo", "external_id"
+        ]
+
+
+from rest_framework import serializers
+from .models import Product, Carrier, Order
+
+
+class ProductSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = Product
+        fields = "__all__"
+
+
+class CarrierSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = Carrier
+        fields = "__all__"

backend/commerce/tests.py

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+from django.test import TestCase
+
+# Create your tests here.

backend/commerce/views.py

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+from django.shortcuts import render
+
+# Create your views here.