adds Slack notification for when an OrganizationInvitation is created…

… (initially sent)

apps/organizations/apps.py

@@ -1,9 +1,37 @@
+# Third Party (PyPI) Imports
+import rollbar
+
 # Django Imports
 from django.apps import AppConfig
+from django.conf import settings
 from django.db.models import signals
 
 # HTK Imports
 from htk.app_config import HtkAppConfig
+from htk.decorators.classes import disable_for_loaddata
+from htk.utils import (
+    htk_setting,
+    resolve_model_dynamically,
+)
+
+
+# isort: off
+
+
+@disable_for_loaddata
+def organization_invitation_created(sender, instance, created, **kwargs):
+    """Signal handler for when a new OrganizationInvitation object is created"""
+    if created:
+        invitation = instance
+
+        if not settings.TEST and htk_setting('HTK_SLACK_NOTIFICATIONS_ENABLED'):
+            try:
+                from htk.utils.notifications import slack_notify
+
+                msg = invitation.build_notification_message__created()
+                slack_notify(msg)
+            except:
+                rollbar.report_exc_info()
 
 
 class HtkOrganizationAppConfig(HtkAppConfig):
@@ -12,4 +40,12 @@ class HtkOrganizationAppConfig(HtkAppConfig):
     verbose_name = 'Organizations'
 
     def ready(self):
-        pass
+        OrganizationInvitation = resolve_model_dynamically(
+            htk_setting('HTK_ORGANIZATION_INVITATION_MODEL')
+        )
+
+        signals.post_save.connect(
+            organization_invitation_created,
+            sender=OrganizationInvitation,
+            dispatch_uid='htk_organization_invitation_created',
+        )

apps/organizations/models.py

@@ -317,6 +317,21 @@ def status(self) -> str:
 
         return status
 
+    ##
+    # Notifications
+
+    def build_notification_message__created(self):
+        """Builds a message that will be displayed as an internal Slack notification
+        when this invitation object is created.
+        """
+        msg = '{invited_by_name} ({invited_by_username}) has sent an invitation for organization {organization_name} to {email}'.format(
+            invited_by_name=self.invited_by.profile.get_full_name(),
+            invited_by_username=self.invited_by.username,
+            organization_name=self.organization.name,
+            email=self.email,
+        )
+        return msg
+
 
 class BaseAbstractOrganizationTeam(HtkBaseModel):
     name = models.CharField(max_length=128)