[Refactor] Move invitation code to the Event model

calsocial/__init__.py

@@ -255,7 +255,7 @@ class CalendarSocialApp(Flask):
         """
 
         from .forms import InviteForm
-        from .models import db, Event, Invitation, Notification, NotificationAction
+        from .models import db, Event
 
         try:
             event = Event.query.filter(Event.event_uuid == event_uuid).one()
@@ -267,15 +267,7 @@ class CalendarSocialApp(Flask):
         form = InviteForm(event)
 
         if form.validate_on_submit():
-            invite = Invitation(event=event, sender=current_user.profile)
-            form.populate_obj(invite)
-            db.session.add(invite)
-
-            notification = Notification(profile=form.invitee.data,
-                                        actor=current_user.profile,
-                                        item=event,
-                                        action=NotificationAction.invite)
-            db.session.add(notification)
+            event.invite(current_user.profile, invitee=form.invitee.data)
 
             db.session.commit()
 

calsocial/models.py

@@ -417,6 +417,23 @@ class Event(db.Model):
 
         return url_for('event_details', event_uuid=self.event_uuid)
 
+    def invite(self, inviter, invited):
+        """Invite ``invited`` to the event
+
+        The invitation will arrive from ``inviter``.
+        """
+
+        invite = Invitation(event=self, sender=inviter, invitee=invited)
+        db.session.add(invite)
+
+        notification = Notification(profile=invited,
+                                    actor=inviter,
+                                    item=self,
+                                    action=NotificationAction.invite)
+        db.session.add(notification)
+
+        return invite
+
 
 class UserSetting(db.Model):  # pylint: disable=too-few-public-methods
     """Database model for user settings