Restored support to oldest Django versions

pwa/views.py

@@ -1,27 +1,21 @@
-from django.views.generic.base import TemplateView
+from django.http import HttpResponse
+from django.shortcuts import render
 
 from . import app_settings
 
 
-class ServiceWorker(TemplateView):
-    content_type = 'application/javascript'
-    template_name = app_settings.PWA_SERVICE_WORKER_PATH
-    
-    def get_context_data(self, **kwargs):
-        kwargs['PWA_APP_FETCH_URL'] = app_settings.PWA_APP_FETCH_URL
-        return super().get_context_data(**kwargs)
+def service_worker(request):
+    response = HttpResponse(open(app_settings.PWA_SERVICE_WORKER_PATH).read(), content_type='application/javascript')
+    return response
 
 
-class Manifest(TemplateView):
-    content_type = 'application/json'
-    template_name = 'manifest.json'
-    
-    def get_context_data(self, **kwargs):
-        for setting_name in dir(app_settings):
-            if setting_name.startswith('PWA_'):
-                kwargs[setting_name] = getattr(app_settings, setting_name)
-        return super().get_context_data(**kwargs)
+def manifest(request):
+    return render(request, 'manifest.json', {
+        setting_name: getattr(app_settings, setting_name)
+        for setting_name in dir(app_settings)
+        if setting_name.startswith('PWA_')
+    })
 
 
-class OfflineView(TemplateView):
-    template_name = "offline.html"
+def offline(request):
+    return render(request, "offline.html")