Merge pull request #13684 from edx/student_cleanup/decoupled_dependencies

Decouple student's dependency on badges with django signals

lms/djangoapps/badges/apps.py

@@ -0,0 +1,20 @@
+"""
+Badges Application Configuration
+
+Signal handlers are connected here.
+"""
+
+from django.apps import AppConfig
+
+
+class BadgesConfig(AppConfig):
+    """
+    Application Configuration for Badges.
+    """
+    name = u'badges'
+
+    def ready(self):
+        """
+        Connect signal handlers.
+        """
+        from . import handlers  # pylint: disable=unused-variable

lms/djangoapps/badges/handlers.py

@@ -0,0 +1,17 @@
+"""
+Badges related signal handlers.
+"""
+from django.dispatch import receiver
+
+from lms.djangoapps.badges.events.course_meta import award_enrollment_badge
+from lms.djangoapps.badges.utils import badges_enabled
+from student.models import ENROLL_STATUS_CHANGE, EnrollStatusChange
+
+
+@receiver(ENROLL_STATUS_CHANGE)
+def award_badge_on_enrollment(sender, event=None, user=None, **kwargs):  # pylint: disable=unused-argument
+    """
+    Awards enrollment badge to the given user on new enrollments.
+    """
+    if badges_enabled and event == EnrollStatusChange.enroll:
+        award_enrollment_badge(user)