implement websites.models.Website.delete

- implement delete method and let it call these tasks:
  - disable_web_vhost
  - delete_web_vhost_config
  - delete_file_website_hierarchy
  - delete_web_php_fpm_pool_config if this was the last website of the
    user

gnuviechadmin/websites/models.py

@@ -13,10 +13,14 @@ from osusers.models import User as OsUser
 
 from fileservertasks.tasks import (
     create_file_website_hierarchy,
+    delete_file_website_hierarchy,
 )
 from webtasks.tasks import (
     create_web_php_fpm_pool_config,
     create_web_vhost_config,
+    delete_web_php_fpm_pool_config,
+    delete_web_vhost_config,
+    disable_web_vhost,
     enable_web_vhost,
 )
 
@@ -61,3 +65,15 @@ class Website(models.Model):
                 self.osuser.username, fqdn, self.wildcard).get()
             enable_web_vhost.delay(fqdn).get()
         return super(Website, self).save(*args, **kwargs)
+
+    @transaction.atomic
+    def delete(self, *args, **kwargs):
+        fqdn = self.get_fqdn()
+        osuser = self.osuser
+        disable_web_vhost.delay(fqdn).get()
+        delete_web_vhost_config.delay(fqdn).get()
+        delete_file_website_hierarchy.delay(osuser.username, fqdn).get()
+        deleted = super(Website, self).delete(*args, **kwargs)
+        if not Website.objects.filter(osuser=osuser):
+            delete_web_php_fpm_pool_config.delay(osuser.username).get()
+        return deleted