add a couple policies

lms/djangoapps/bulk_email/policies.py

+
+from edx_ace.policy import Policy, PolicyResult
+from edx_ace.channel import ChannelType
+from buil_email.models import Optout
+from courseware.models import CourseScheduleConfiguration
+
+
+class CourseEmailOptout(Policy):
+
+    def check(self, message):
+        course_id = message.context.get('course_id')
+        if not course_id:
+            return PolicyResult(deny=[])
+
+        if Optout.objects.filter(user__username=message.recipient.username, course_id=course_id).exists():
+            return PolicyResult(deny=[ChannelType.EMAIL])
+
+        return PolicyResult(deny=[])
+
+
+class CourseMessageEnabled(Policy):
+
+    def check(self, message):
+        course_id = message.context.get('course_id')
+        if not course_id or message.app_label != 'schedules':
+            return PolicyResult(deny=[])
+
+        schedule_config = CourseScheduleConfiguration.current(course_id)
+        if not schedule_config.enabled:
+            return PolicyResult(deny=[ChannelType.ALL])
+
+        if not schedule_config.recurring_reminder_message_enabled and message.name == 'recurringreminder':
+            return PolicyResult(deny=[ChannelType.ALL])
+
+        if not schedule_config.verified_upgrade_reminder_message_enabled and message.name == 'verifiedupgradedeadlinereminder':
+            return PolicyResult(deny=[ChannelType.ALL])
+
+        return PolicyResult(deny=[])