Implement converting prices (#79)

Reviewed-on: #79

games/apps.py

@@ -1,6 +1,33 @@
+from datetime import timedelta
+
 from django.apps import AppConfig
+from django.core.management import call_command
+from django.db.models.signals import post_migrate
+from django.utils.timezone import now
 
 
 class GamesConfig(AppConfig):
     default_auto_field = "django.db.models.BigAutoField"
     name = "games"
+
+    def ready(self):
+        post_migrate.connect(schedule_tasks, sender=self)
+
+
+def schedule_tasks(sender, **kwargs):
+    from django_q.models import Schedule
+    from django_q.tasks import schedule
+
+    if not Schedule.objects.filter(name="Update converted prices").exists():
+        schedule(
+            "games.tasks.convert_prices",
+            name="Update converted prices",
+            schedule_type=Schedule.MINUTES,
+            next_run=now() + timedelta(seconds=30),
+        )
+
+    from games.models import ExchangeRate
+
+    if not ExchangeRate.objects.exists():
+        print("ExchangeRate table is empty. Loading fixture...")
+        call_command("loaddata", "exchangerates.yaml")