Implement Telegram notifications

Some refactoring

INSTALL.md

@@ -35,3 +35,13 @@ The application is then available at [http://localhost:8000/].
 If you want to make your Kumify instance available through a network, you will need to set up something like gunicorn and nginx. How this works is beyond the scope of this document. To prepare your static files for this, make sure ```STATIC_ROOT``` is set to the correct location in localsettings.py if you don't use S3, then run:
 
 ```python3 manage.py collectstatic```
+
+### Cron job
+
+In order to use scheduled tasks, you need to make sure that the ```/cron/``` endpoint is called at regular intervals. Every five minutes should work fine. Use a command like ```curl http://localhost:8000/cron/```, for example.
+
+### Telegram webhook
+
+If you wish to receive incoming messages through the Telegram gateway, your server must be reachable from the Internet. Configure a public IP/domain name as well as an HTTPS certificate, then run:
+
+```python3 manage.py telegramwebhook```

cronhandler/admin.py

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

cronhandler/apps.py

@@ -0,0 +1,5 @@
+from django.apps import AppConfig
+
+
+class CronhandlerConfig(AppConfig):
+    name = 'cronhandler'

cronhandler/models.py

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

cronhandler/signals.py

@@ -0,0 +1,3 @@
+from django.dispatch import Signal
+
+cron = Signal()

cronhandler/tests.py

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

cronhandler/urls.py

@@ -0,0 +1,9 @@
+from .views import CronHandlerView
+
+from django.urls import path
+
+app_name = "cron"
+
+urlpatterns = [
+    path('', CronHandlerView.as_view(), name="cronhandler"),
+]

cronhandler/views.py

@@ -0,0 +1,8 @@
+from django.views.generic import View
+from django.http import HttpResponse
+
+from .signals import cron
+
+class CronHandlerView(View):
+    def get(self, *args, **kwargs):
+        return HttpResponse()