Skeleton for emails script.

lms/djangoapps/linkedin/management/commands/mailusers.py

+"""
+Send emails to users inviting them to add their course certificates to their
+LinkedIn profiles.
+"""
+
+from itertools import imap
+
+from django.core.management.base import BaseCommand
+from optparse import make_option
+
+from certificates.models import GeneratedCertificate
+from ...models import LinkedIn
+
+
+class Command(BaseCommand):
+    args = ''
+    help = ('Sends emails to edX users that are on LinkedIn who have completed '
+            'course certificates, inviting them to add their certificates to '
+            'their LinkedIn profiles')
+    option_list = BaseCommand.option_list + (
+        make_option(
+            '--grandfather',
+            action='store_true',
+            dest='grandfather',
+            default=False,
+            help="Creates aggregate invitations for all certificates a user "
+                 "has earned to date and sends a 'grandfather' email.  This is "
+                 "intended to be used when the feature is launched to invite "
+                 "all users that have earned certificates to date to add their "
+                 "certificates.  Afterwards the default, one email per "
+                 "certificate mail form will be used."),)
+
+    def handle(self, *args, **options):
+        grandfather = options.get('grandfather', False)
+        accounts = LinkedIn.objects.filter(has_linkedin_account=True)
+        for user in imap(lambda account: account.user, accounts):   # lazy
+            certificates = GeneratedCertificate.objects.filter(user=user)
+            certificates = certificates.filter(status='downloadable')
+            if not certificates:
+                continue
+            if grandfather:
+                send_grandfather_email(user, certificates)
+            else:
+                for certificate in certificates:
+                    send_email(user, certificate)
+
+
+def send_grandfather_email(user, certificates):
+    """
+    Send the 'grandfathered' email informing historical students that they may
+    now post their certificates on their LinkedIn profiles.
+    """
+    print "GRANDFATHER: ", user, certificates
+
+
+def send_email(user, certificate):
+    """
+    Email a user that recently earned a certificate, inviting them to post their
+    certificate on their LinkedIn profile.
+    """
+    print "EMAIL: ", user, certificate

lms/djangoapps/linkedin/models.py

@@ -11,3 +11,4 @@ class LinkedIn(models.Model):
     """
     user = models.OneToOneField(User, primary_key=True)
     has_linkedin_account = models.NullBooleanField(default=None)
+    emailed_courses = models.TextField(default="[]")  # JSON list of course ids