Add a simple mail queue in the database

Adds a function to call that will render a complete MIME message, and
write the resulting text to a database table.

Then there is a cron job that runs at regular intervals (every 5 mins or so)
and sends all the queued emails.

This brings in two important functions:
 * The ability to "send" emails from regular web views without the risk of ending
   up blocking on the SMTP server.
 * The abilitty to "transactionally send email" - meaning that mail sen this way
   will just disappear if the transaction (normally managed by django) that's open
   when it was sent ends up rolling back. This prevents re-sending email over and
   over again when some later step in the process fails.

1 files changed, 11 insertions, 0 deletions

diff --git a/postgresqleu/mailqueue/models.py b/postgresqleu/mailqueue/models.py
new file mode 100644
index 00000000..f2e7d198
--- /dev/null
+++ b/postgresqleu/mailqueue/models.py
@@ -0,0 +1,11 @@
+from django.db import models
+
+class QueuedMail(models.Model):
+	sender = models.EmailField(max_length=100, null=False, blank=False)
+	receiver = models.EmailField(max_length=100, null=False, blank=False)
+	# We store the raw MIME message, so if there are any attachments or
+	# anything, we just push them right in there!
+	fullmsg = models.TextField(null=False, blank=False)
+
+	def __unicode__(self):
+		return "%s: %s -> %s" % (self.pk, self.sender, self.receiver)