Add basic API module

api/admin.py

@@ -0,0 +1,3 @@
+from django.contrib import admin
+
+# Register your models here.

api/apps.py

@@ -0,0 +1,6 @@
+from django.apps import AppConfig
+
+
+class ApiConfig(AppConfig):
+    default_auto_field = 'django.db.models.BigAutoField'
+    name = 'api'

api/models.py

@@ -0,0 +1,3 @@
+from django.db import models
+
+# Create your models here.

api/tests.py

@@ -0,0 +1,3 @@
+from django.test import TestCase
+
+# Create your tests here.

api/urls.py

@@ -0,0 +1,6 @@
+from django.urls import path
+from api.views import AvailabilityView
+
+urlpatterns = [
+    path('availability/', AvailabilityView.as_view(), name="availability")
+]

api/views.py

@@ -0,0 +1,9 @@
+from django.views.generic import View
+from django.http import JsonResponse
+
+from buyer.models import Card
+
+class AvailabilityView(View):
+    def get(self, request):
+        cards = len(Card.objects.filter(delivered__isnull=True))
+        return JsonResponse({"cards": cards})

susioma/urls.py

@@ -19,5 +19,6 @@ from django.urls import include, path
 urlpatterns = [
     path('admin/', admin.site.urls),
     path('accounts/', include('django.contrib.auth.urls')),
+    path('api/', include('api.urls')),
     path('', include('frontend.urls')),
 ]