AvaCodeSolutions · payamnj · Mar 6, 2026 · Mar 6, 2026
diff --git a/django_email_learning/jobs/deliver_contents_job.py b/django_email_learning/jobs/deliver_contents_job.py
@@ -62,7 +62,14 @@ def get_delivery_queue(self) -> DeliveryQueueProtocol:
             settings, "DJANGO_EMAIL_LEARNING", {}
         )
         try:
-            return import_string(DJANGO_EMAIL_LEARNING_SETTINGS["DELIVERY_QUEUE"])
+            configured_delivery_queue = import_string(
+                DJANGO_EMAIL_LEARNING_SETTINGS["DELIVERY_QUEUE"]
+            )
+            return (
+                configured_delivery_queue()
+                if isinstance(configured_delivery_queue, type)
+                else configured_delivery_queue
+            )
         except KeyError:
             from django_email_learning.services.defaults.database_delivery_queue import (
                 DatabaseDeliveryQueue,

diff --git a/django_email_learning/models.py b/django_email_learning/models.py
@@ -17,6 +17,7 @@
     MinLengthValidator,
 )
 from django_email_learning.services.email_sender_service import EmailSenderService
+from django_email_learning.services.metrics_service import MetricsService
 from django.core.mail import EmailMultiAlternatives
 from django.template.loader import render_to_string
 from django.core.exceptions import ImproperlyConfigured
@@ -60,6 +61,9 @@ class DeliveryStatus(StrEnum):
     BLOCKED = "blocked"
 
 
+METRIC_SERVICE = MetricsService()
+
+
 def is_domain_or_ip(value: str) -> None:
     """
     Validate if the given value is a valid domain name or IP address.
@@ -557,6 +561,10 @@ def graduate(self) -> None:
                 )
             self.status = EnrollmentStatus.COMPLETED
             self.final_state_at = timezone.now()
+            METRIC_SERVICE.user_completed_course(
+                course_slug=self.course.slug,
+                organization_id=self.course.organization.id,
+            )
             logger.info(
                 f"Learner ID {self.learner.id} has completed the course {self.course.title}."
             )
@@ -609,6 +617,11 @@ def fail(self) -> None:
         self.status = EnrollmentStatus.DEACTIVATED
         self.deactivation_reason = DeactivationReason.FAILED
         self.final_state_at = timezone.now()
+        METRIC_SERVICE.user_enrollment_deactivated(
+            course_slug=self.course.slug,
+            organization_id=self.course.organization.id,
+            reason=DeactivationReason.FAILED,
+        )
         logger.info(
             f"Learner ID {self.learner.id} has failed the course {self.course.title}."
         )

diff --git a/django_email_learning/personalised/api/views.py b/django_email_learning/personalised/api/views.py
@@ -5,6 +5,7 @@
     QuizSubmissionRequest,
     QuestionResponse,
 )
+from django_email_learning.services.metrics_service import MetricsService
 from django_email_learning.services import jwt_service
 from django.utils.translation import gettext as _
 from django_email_learning.models import (
@@ -19,6 +20,8 @@
 import json
 import logging
 
+METRIC_SERVICE = MetricsService()
+
 logger = logging.getLogger(__name__)
 
 
@@ -113,6 +116,12 @@ def post(self, request, *args, **kwargs):  # type: ignore[no-untyped-def]
                 )
                 delivery.repeat_delivery_in_days(1)
 
+        METRIC_SERVICE.quiz_submitted(
+            course_slug=enrolment.course.slug,
+            organization_id=enrolment.course.organization.id,
+            quiz_id=quiz.id,
+            is_passed=passed,
+        )
         return JsonResponse(
             {
                 "score": score,

diff --git a/django_email_learning/ports/metric_recorder_protocol.py b/django_email_learning/ports/metric_recorder_protocol.py
@@ -0,0 +1,34 @@
+from typing import Protocol
+from django_email_learning.models import DeactivationReason
+
+
+class MetricRecorderProtocol(Protocol):
+    def user_enrolled_in_course(self, course_slug: str, organization_id: int) -> None:
+        ...
+
+    def quiz_sent(self, course_slug: str, organization_id: int, quiz_id: int) -> None:
+        ...
+
+    def lesson_sent(
+        self, course_slug: str, organization_id: int, lesson_id: int
+    ) -> None:
+        ...
+
+    def user_enrollment_activated(self, course_slug: str, organization_id: int) -> None:
+        ...
+
+    def user_enrollment_deactivated(
+        self, course_slug: str, organization_id: int, reason: DeactivationReason
+    ) -> None:
+        ...
+
+    def user_completed_course(self, course_slug: str, organization_id: int) -> None:
+        ...
+
+    def quiz_submitted(
+        self, course_slug: str, organization_id: int, quiz_id: int, is_passed: bool
+    ) -> None:
+        ...
+
+    def method_executed(self, method_name: str, execution_time: int) -> None:
+        ...
diff --git a/django_email_learning/services/command_models/enroll_command.py b/django_email_learning/services/command_models/enroll_command.py
@@ -20,6 +20,7 @@
 from django_email_learning.services.utils import mask_email
 from django_email_learning.services.email_sender_service import EmailSenderService
 from django_email_learning.services import jwt_service
+from django_email_learning.services.metrics_service import MetricsService
 from django.core.mail import EmailMultiAlternatives
 from django.template.loader import render_to_string
 from django.utils.translation import gettext as _
@@ -36,6 +37,7 @@ class EnrollCommand(AbstractCommand):
     no_verification: bool = False
 
     def execute(self) -> None:
+        metric_service = MetricsService()
         # Check if the email is blocked
         if BlockedEmail.objects.filter(email=self.email).exists():
             self.logger.info(
@@ -88,6 +90,8 @@ def execute(self) -> None:
             f"Enrollment Successful: Learner ID {learner.id} enrolled in course '{self.course_slug}'. Enrollment ID: {enrollment.id}"
         )
 
+        metric_service.user_enrolled_in_course(self.course_slug, self.organization_id)
+
         if self.no_verification:
             self.logger.info(
                 f"Verification email skipped for Enrollment ID: {enrollment.id} as per command parameter"

diff --git a/django_email_learning/services/command_models/send_lesson_command.py b/django_email_learning/services/command_models/send_lesson_command.py
@@ -3,6 +3,7 @@
 )
 from django_email_learning.models import Lesson, CourseContent
 from django_email_learning.services.email_sender_service import EmailSenderService
+from django_email_learning.services.metrics_service import MetricsService
 from django.core.mail import EmailMultiAlternatives
 from django.template.loader import render_to_string
 from typing import Literal
@@ -18,6 +19,7 @@ class SendLessonCommand(AbstractCommand):
     email: str
 
     def execute(self) -> None:
+        metric_service = MetricsService()
         content = CourseContent.objects.get(id=self.content_id)
         if not content.lesson:
             raise LessonNotFoundError(
@@ -52,3 +54,8 @@ def execute(self) -> None:
         )
 
         email_service.send(email_message)
+        metric_service.lesson_sent(
+            course_slug=content.course.slug,
+            organization_id=content.course.organization.id,
+            lesson_id=lesson.id,
+        )
diff --git a/django_email_learning/services/command_models/send_quiz_command.py b/django_email_learning/services/command_models/send_quiz_command.py
@@ -3,6 +3,7 @@
 )
 from django_email_learning.models import Quiz, CourseContent
 from django_email_learning.services.email_sender_service import EmailSenderService
+from django_email_learning.services.metrics_service import MetricsService
 from django.core.mail import EmailMultiAlternatives
 from django.template.loader import render_to_string
 from typing import Literal
@@ -19,6 +20,7 @@ class SendQuizCommand(AbstractCommand):
     content_id: int
 
     def execute(self) -> None:
+        metric_service = MetricsService()
         content = CourseContent.objects.get(id=self.content_id)
         if not content.quiz:
             raise QuizNotFoundError(
@@ -53,3 +55,8 @@ def execute(self) -> None:
         )
 
         email_service.send(email_message)
+        metric_service.quiz_sent(
+            course_slug=content.course.slug,
+            organization_id=content.course.organization.id,
+            quiz_id=quiz.id,
+        )
diff --git a/django_email_learning/services/command_models/unsubscribe_command.py b/django_email_learning/services/command_models/unsubscribe_command.py
@@ -8,6 +8,7 @@
     DeactivationReason,
 )
 from django.utils import timezone
+from django_email_learning.services.metrics_service import MetricsService
 from django_email_learning.services.command_models.abstract_command import (
     AbstractCommand,
 )
@@ -23,6 +24,7 @@ class UnsubscribeCommand(AbstractCommand):
     organization_id: int
 
     def execute(self) -> None:
+        metric_service = MetricsService()
         try:
             course = Course.objects.get(
                 slug=self.course_slug, organization_id=self.organization_id
@@ -66,3 +68,8 @@ def execute(self) -> None:
             deactivation_reason=DeactivationReason.CANCELED,
             final_state_at=timezone.now(),
         )
+        metric_service.user_enrollment_deactivated(
+            course_slug=course.slug,
+            organization_id=course.organization.id,
+            reason=DeactivationReason.CANCELED,
+        )
diff --git a/django_email_learning/services/command_models/verify_enrollment_command.py b/django_email_learning/services/command_models/verify_enrollment_command.py
@@ -11,6 +11,7 @@
     InvalidVerificationCodeError,
 )
 from django_email_learning.services.email_sender_service import EmailSenderService
+from django_email_learning.services.metrics_service import MetricsService
 from django.core.mail import EmailMultiAlternatives
 from django.template.loader import render_to_string
 from django.utils.translation import gettext as _
@@ -24,6 +25,7 @@ class VerifyEnrollmentCommand(AbstractCommand):
     verification_code: str = Field(..., pattern=r"^\d{6}$")
 
     def execute(self) -> None:
+        metric_service = MetricsService()
         try:
             enrollment = Enrollment.objects.get(
                 id=self.enrollment_id, status=EnrollmentStatus.UNVERIFIED
@@ -58,6 +60,9 @@ def execute(self) -> None:
         self.logger.info(
             f"Content Delivery Scheduled: First content delivery scheduled for Enrollment ID {self.enrollment_id}"
         )
+        metric_service.user_enrollment_activated(
+            enrollment.course.slug, enrollment.course.organization.id
+        )
 
         # Send confirmation email
         email_service = EmailSenderService()

diff --git a/django_email_learning/services/defaults/log_based_metric_recorder.py b/django_email_learning/services/defaults/log_based_metric_recorder.py
@@ -0,0 +1,78 @@
+from django_email_learning.ports.metric_recorder_protocol import MetricRecorderProtocol
+from django_email_learning.models import DeactivationReason
+import logging
+
+logger = logging.getLogger(__name__)
+
+
+class LogBasedMetricRecorder(MetricRecorderProtocol):
+    def user_enrolled_in_course(self, course_slug: str, organization_id: int) -> None:
+        logger.info(
+            "User enrolled",
+            extra={"course_slug": course_slug, "organization_id": organization_id},
+        )
+
+    def quiz_sent(self, course_slug: str, organization_id: int, quiz_id: int) -> None:
+        logger.info(
+            "Quiz sent",
+            extra={
+                "course_slug": course_slug,
+                "organization_id": organization_id,
+                "quiz_id": quiz_id,
+            },
+        )
+
+    def lesson_sent(
+        self, course_slug: str, organization_id: int, lesson_id: int
+    ) -> None:
+        logger.info(
+            "Lesson sent",
+            extra={
+                "course_slug": course_slug,
+                "organization_id": organization_id,
+                "lesson_id": lesson_id,
+            },
+        )
+
+    def user_enrollment_activated(self, course_slug: str, organization_id: int) -> None:
+        logger.info(
+            "User enrollment activated",
+            extra={"course_slug": course_slug, "organization_id": organization_id},
+        )
+
+    def user_enrollment_deactivated(
+        self, course_slug: str, organization_id: int, reason: DeactivationReason
+    ) -> None:
+        logger.info(
+            "User enrollment deactivated",
+            extra={
+                "course_slug": course_slug,
+                "organization_id": organization_id,
+                "reason": reason,
+            },
+        )
+
+    def user_completed_course(self, course_slug: str, organization_id: int) -> None:
+        logger.info(
+            "User completed course",
+            extra={"course_slug": course_slug, "organization_id": organization_id},
+        )
+
+    def quiz_submitted(
+        self, course_slug: str, organization_id: int, quiz_id: int, is_passed: bool
+    ) -> None:
+        logger.info(
+            "Quiz submitted",
+            extra={
+                "course_slug": course_slug,
+                "organization_id": organization_id,
+                "quiz_id": quiz_id,
+                "is_passed": is_passed,
+            },
+        )
+
+    def method_executed(self, method_name: str, execution_time: int) -> None:
+        logger.info(
+            "Method executed",
+            extra={"method_name": method_name, "execution_time": execution_time},
+        )
diff --git a/django_email_learning/services/email_sender_service.py b/django_email_learning/services/email_sender_service.py
@@ -9,9 +9,14 @@ def __init__(self) -> None:
             settings, "DJANGO_EMAIL_LEARNING", {}
         )
         try:
-            self.email_sender = import_string(
+            configured_email_sender = import_string(
                 DJANGO_EMAIL_LEARNING_SETTINGS["EMAIL_SENDER"]
             )
+            self.email_sender = (
+                configured_email_sender()
+                if isinstance(configured_email_sender, type)
+                else configured_email_sender
+            )
         except KeyError:
             from django_email_learning.services.defaults.email_sender import (
                 DjangoEmailSender,