allow and check for regex in email suppression

app/marketing/migrations/0004_auto_20190801_1303.py

@@ -0,0 +1,18 @@
+# Generated by Django 2.2.3 on 2019-08-01 13:03
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('marketing', '0003_auto_20190720_1709'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='emailsupressionlist',
+            name='email',
+            field=models.TextField(max_length=255),
+        ),
+    ]

app/marketing/models.py

@@ -342,7 +342,7 @@ def __str__(self):
 
 class EmailSupressionList(SuperModel):
 
-    email = models.EmailField(max_length=255)
+    email = models.TextField(max_length=255)
     metadata = JSONField(default=dict, blank=True)
     comments = models.TextField(max_length=5000, blank=True)
 

app/marketing/utils.py

@@ -27,7 +27,7 @@
 
 import requests
 from mailchimp3 import MailChimp
-from marketing.models import AccountDeletionRequest, LeaderboardRank
+from marketing.models import AccountDeletionRequest, EmailSupressionList, LeaderboardRank
 from slackclient import SlackClient
 from slackclient.exceptions import SlackClientError
 
@@ -201,6 +201,12 @@ def should_suppress_notification_email(email, email_type):
 
 
 def get_or_save_email_subscriber(email, source, send_slack_invite=True, profile=None):
+    # Prevent syncing for those who match the suppression list
+    suppressions = EmailSupressionList.objects.all()
+    for suppression in suppressions:
+        if re.match(suppression, email):
+            return None
+
     from marketing.models import EmailSubscriber
     defaults = {'source': source, 'email': email}