Add warning email and notification

This adds the abandoned changes made to the notification
system and also adds a simple task to check for expiring
bookings and sends out emails and notifications.

Change-Id: I1530d19f41cf93626bb642e6b269f9ec55860b81
Signed-off-by: Brandon Lo <lobrandon1217@gmail.com>

1 files changed, 27 insertions, 0 deletions

diff --git a/src/notifier/models.py b/src/notifier/models.py
index 49189e8..382d3a9 100644
--- a/src/notifier/models.py
+++ b/src/notifier/models.py
@@ -9,6 +9,7 @@
 
 from django.db import models
 from account.models import UserProfile
+from booking.models import Booking
 
 
 class Notification(models.Model):
@@ -23,3 +24,29 @@ class Notification(models.Model):
 
     def to_preview_html(self):
         return "<h3>" + self.title + "</h3>"  # TODO - template?
+
+
+class Emailed(models.Model):
+    """
+    A simple record to remember who has already gotten an email
+    to avoid resending
+    """
+    begin_booking = models.OneToOneField(
+        Booking,
+        null=True,
+        on_delete=models.CASCADE,
+        related_name="begin_mail"
+    )
+    almost_end_booking = models.OneToOneField(
+        Booking,
+        null=True,
+        on_delete=models.CASCADE,
+        related_name="warning_mail"
+    )
+    end_booking = models.OneToOneField(
+        Booking,
+        null=True,
+        on_delete=models.CASCADE,
+        related_name="over_mail"
+    )
+