feat: add tracking log for completion events

completion/models.py

@@ -14,12 +14,17 @@
 
 from model_utils.models import TimeStampedModel
 
+from eventtracking import tracker
+
 from . import waffle
 
 log = logging.getLogger(__name__)
 User = auth.get_user_model()
 
 
+BLOCK_COMPLETION_CHANGED_EVENT_TYPE = 'edx.completion.block_completion.changed'
+
+
 def validate_percent(value):
     """
     Verify that the passed value is between 0.0 and 1.0.
@@ -115,17 +120,21 @@ def submit_completion(self, user, block_key, completion):
                     block_key=block_key,
                 )
                 is_new = False
+
             if not is_new and obj.completion != completion:
                 obj.completion = completion
                 obj.full_clean()
                 obj.save(update_fields={'completion', 'modified'})
+
+            obj.emit_tracking_log()
         else:
             # If the feature is not enabled, this method should not be called.
             # Error out with a RuntimeError.
             raise RuntimeError(
                 "BlockCompletion.objects.submit_completion should not be \
                 called when the feature is disabled."
             )
+
         return obj, is_new
 
     @transaction.atomic()
@@ -321,3 +330,20 @@ class Meta:
 
     def __unicode__(self):
         return f'BlockCompletion: {self.user.username}, {self.context_key}, {self.block_key}: {self.completion}'
+
+    def emit_tracking_log(self):
+        """
+        Emit a tracking log when a block completion is created or updated.
+        """
+        tracker.emit(
+            BLOCK_COMPLETION_CHANGED_EVENT_TYPE,
+            {
+                'user_id': self.user.id,
+                'course_id': str(self.context_key),
+                'block_id': str(self.block_key),
+                'block_type': self.block_type,
+                'completion': self.completion,
+                'modified': self.modified,
+                'created': self.created,
+            }
+        )

completion/test_utils.py

@@ -7,7 +7,11 @@
 from datetime import datetime
 
 from django.contrib import auth
+from django.test.utils import override_settings
 from edx_toggles.toggles.testutils import override_waffle_switch
+from eventtracking import tracker
+from django.test import TestCase
+from eventtracking.django import DjangoTracker
 import factory
 from factory.django import DjangoModelFactory
 from opaque_keys.edx.keys import UsageKey
@@ -120,3 +124,50 @@ def override_completion_switch(self, enabled):
         """
         with override_waffle_switch(waffle.ENABLE_COMPLETION_TRACKING_SWITCH, enabled):
             yield
+
+
+IN_MEMORY_BACKEND_CONFIG = {
+    'mem': {
+        'ENGINE': 'completion.test_utils.InMemoryBackend'
+    }
+}
+
+
+class InMemoryBackend:
+    """A backend that simply stores all events in memory"""
+
+    def __init__(self):
+        super().__init__()  # lint-amnesty, pylint: disable=super-with-arguments
+        self.events = []
+
+    def send(self, event):
+        """Store the event in a list"""
+        self.events.append(event)
+
+
+@override_settings(
+    EVENT_TRACKING_BACKENDS=IN_MEMORY_BACKEND_CONFIG
+)
+class EventTrackingTestCase(TestCase):
+    """
+    Supports capturing of emitted events in memory and inspecting them.
+
+    Each test gets a "clean slate" and can retrieve any events emitted during their execution.
+
+    """
+
+    # Make this more robust to the addition of new events that the test doesn't care about.
+
+    def setUp(self):
+        super().setUp()  # lint-amnesty, pylint: disable=super-with-arguments
+
+        self.recreate_tracker()
+
+    def recreate_tracker(self):
+        """
+        Re-initialize the tracking system using updated django settings.
+
+        Use this if you make use of the @override_settings decorator to customize the tracker configuration.
+        """
+        self.tracker = DjangoTracker()
+        tracker.register_tracker(self.tracker)

completion/tests/test_models.py

@@ -12,7 +12,7 @@
 from opaque_keys.edx.keys import CourseKey, UsageKey
 
 from .. import models
-from ..test_utils import CompletionSetUpMixin, UserFactory, submit_completions_for_testing
+from ..test_utils import CompletionSetUpMixin, EventTrackingTestCase, UserFactory, submit_completions_for_testing
 
 
 class PercentValidatorTestCase(TestCase):
@@ -29,7 +29,7 @@ def test_invalid_percent(self):
             self.assertRaises(ValidationError, models.validate_percent, value)
 
 
-class SubmitCompletionTestCase(CompletionSetUpMixin, TestCase):
+class SubmitCompletionTestCase(CompletionSetUpMixin, EventTrackingTestCase, TestCase):
     """
     Test that BlockCompletion.objects.submit_completion has the desired
     semantics.
@@ -41,7 +41,7 @@ def setUp(self):
         self.set_up_completion()
 
     def test_changed_value(self):
-        with self.assertNumQueries(6):  # Get, update, 2 * savepoints, 2 * exists checks
+        with self.assertNumQueries(7):  # 2 * Get, update, 2 * savepoints, 2 * exists checks
             completion, isnew = models.BlockCompletion.objects.submit_completion(
                 user=self.user,
                 block_key=self.block_key,
@@ -53,7 +53,7 @@ def test_changed_value(self):
         self.assertEqual(models.BlockCompletion.objects.count(), 1)
 
     def test_unchanged_value(self):
-        with self.assertNumQueries(3):  # Get + 2 * savepoints
+        with self.assertNumQueries(4):  # 2 * Get + 2 * savepoints
             completion, isnew = models.BlockCompletion.objects.submit_completion(
                 user=self.user,
                 block_key=self.block_key,

requirements/base.in

@@ -9,3 +9,4 @@ edx-drf-extensions>=1.11.0
 edx-toggles>=1.2.0
 pytz
 XBlock>=1.2.2
+event-tracking

requirements/dev.txt

@@ -4,6 +4,8 @@
 #
 #    make upgrade
 #
+amqp==5.1.1
+    # via kombu
 appdirs==1.4.4
     # via fs
 asgiref==3.7.2
@@ -12,8 +14,16 @@ astroid==2.15.6
     # via
     #   pylint
     #   pylint-celery
+backports-zoneinfo[tzdata]==0.2.1
+    # via
+    #   celery
+    #   kombu
+billiard==4.1.0
+    # via celery
 build==1.0.3
     # via pip-tools
+celery==5.3.4
+    # via event-tracking
 certifi==2023.7.22
     # via requests
 cffi==1.15.1
@@ -26,13 +36,23 @@ charset-normalizer==3.2.0
     # via requests
 click==8.1.7
     # via
+    #   celery
+    #   click-didyoumean
     #   click-log
+    #   click-plugins
+    #   click-repl
     #   code-annotations
     #   edx-django-utils
     #   edx-lint
     #   pip-tools
+click-didyoumean==0.3.0
+    # via celery
 click-log==0.4.0
     # via edx-lint
+click-plugins==1.1.1
+    # via celery
+click-repl==0.3.0
+    # via celery
 code-annotations==1.5.0
     # via
     #   edx-lint
@@ -64,6 +84,7 @@ django==3.2.21
     #   edx-drf-extensions
     #   edx-i18n-tools
     #   edx-toggles
+    #   event-tracking
 django-crum==0.7.9
     # via
     #   edx-django-utils
@@ -88,6 +109,7 @@ edx-django-utils==5.7.0
     # via
     #   edx-drf-extensions
     #   edx-toggles
+    #   event-tracking
 edx-drf-extensions==8.9.2
     # via -r requirements/base.in
 edx-i18n-tools==1.1.0
@@ -102,6 +124,8 @@ edx-opaque-keys[django]==2.5.0
     #   edx-drf-extensions
 edx-toggles==5.1.0
     # via -r requirements/base.in
+event-tracking==2.2.0
+    # via -r requirements/base.in
 exceptiongroup==1.1.3
     # via pytest
 factory-boy==3.3.0
@@ -143,6 +167,8 @@ jinja2==3.1.2
     #   diff-cover
 keyring==24.2.0
     # via twine
+kombu==5.3.2
+    # via celery
 lazy-object-proxy==1.9.0
     # via astroid
 lxml==4.9.3
@@ -189,6 +215,8 @@ pluggy==1.3.0
     #   tox
 polib==1.2.0
     # via edx-i18n-tools
+prompt-toolkit==3.0.39
+    # via click-repl
 psutil==5.9.5
     # via edx-django-utils
 py==1.11.0
@@ -223,7 +251,9 @@ pylint-plugin-utils==0.8.2
     #   pylint-celery
     #   pylint-django
 pymongo==3.13.0
-    # via edx-opaque-keys
+    # via
+    #   edx-opaque-keys
+    #   event-tracking
 pynacl==1.5.0
     # via edx-django-utils
 pyproject-hooks==1.0.0
@@ -238,6 +268,7 @@ pytest-django==4.5.2
     # via -r requirements/test.in
 python-dateutil==2.8.2
     # via
+    #   celery
     #   edx-drf-extensions
     #   faker
     #   freezegun
@@ -249,6 +280,7 @@ pytz==2023.3.post1
     #   -r requirements/base.in
     #   django
     #   djangorestframework
+    #   event-tracking
     #   xblock
 pyyaml==6.0.1
     # via
@@ -276,6 +308,7 @@ six==1.16.0
     # via
     #   edx-drf-extensions
     #   edx-lint
+    #   event-tracking
     #   fs
     #   python-dateutil
     #   tox
@@ -317,14 +350,26 @@ typing-extensions==4.7.1
     #   edx-opaque-keys
     #   faker
     #   filelock
+    #   kombu
     #   pylint
     #   rich
+tzdata==2023.3
+    # via
+    #   backports-zoneinfo
+    #   celery
 urllib3==2.0.4
     # via
     #   requests
     #   twine
+vine==5.0.0
+    # via
+    #   amqp
+    #   celery
+    #   kombu
 virtualenv==20.24.5
     # via tox
+wcwidth==0.2.6
+    # via prompt-toolkit
 web-fragments==2.1.0
     # via xblock
 webob==1.8.7