create default message style per server

apps/home/models.py

@@ -5,6 +5,8 @@ from django.db import models
 from django.utils import timezone
 from django.utils.translation import gettext_lazy as _
 from django.core.exceptions import ValidationError
+from django.db.models.signals import post_save
+from django.dispatch import receiver
 
 log = logging.getLogger(__name__)
 
@@ -145,6 +147,28 @@ class MessageStyle(models.Model):
         return f"{self.server.name} - {self.id}"
 
 
+@receiver(post_save, sender=Server)
+def create_default_items(sender, instance, created, **kwargs):
+    if not created:
+        return
+
+    # Create a default message style, so the user can get straight into creating subscriptions
+    # (subscriptions require a message style to exist)
+    MessageStyle.objects.create(
+        server=instance,
+        name=_("Default Message Style"),
+        colour="3498db",
+        is_embed=True,
+        is_hyperlinked=True,
+        show_author=True,
+        show_timestamp=True,
+        show_images=True,
+        fetch_images=True,
+        title_mutator=None,
+        description_mutator=None
+    )
+
+
 # region Unique Content Rule
 
 class UniqueContentRule(models.Model):