Support sqlite3, using thread to send emails, etc.

Lighten the project by supporting sqlite3 and also handling email using only python threads

README.md

@@ -51,7 +51,6 @@ If you would like to contribute, simply begin by implementing one from the list
 > The following programs are required to run the project
 
 - [Python3.8+](https://www.python.org/downloads/)
-- [Redis](https://redis.io/docs/latest/operate/oss_and_stack/install/install-redis/)
 
 # Installation
 
@@ -83,18 +82,6 @@ python manage.py createsuperuser
 python manage.py runserver
 ```
 
-Make sure your Redis server is running
-
-```bash
-redis-server
-```
-
-Start the celery worker
-
-```bash
-celery -A config.celery worker -l INFO
-```
-
 Last but not least, go to this address http://127.0.0.1:8000
 
 # References

accounts/signals.py

@@ -1,5 +1,8 @@
-from .tasks import send_new_student_email, send_new_lecturer_email
-from .utils import generate_student_credentials, generate_lecturer_credentials
+from .utils import (
+    generate_student_credentials,
+    generate_lecturer_credentials,
+    send_new_account_email,
+)
 
 
 def post_save_account_receiver(sender, instance=None, created=False, *args, **kwargs):
@@ -13,7 +16,7 @@ def post_save_account_receiver(sender, instance=None, created=False, *args, **kw
             instance.set_password(password)
             instance.save()
             # Send email with the generated credentials
-            send_new_student_email.delay(instance.pk, password)
+            send_new_account_email(instance, password)
 
         if instance.is_lecturer:
             username, password = generate_lecturer_credentials()
@@ -21,4 +24,4 @@ def post_save_account_receiver(sender, instance=None, created=False, *args, **kw
             instance.set_password(password)
             instance.save()
             # Send email with the generated credentials
-            send_new_lecturer_email.delay(instance.pk, password)
+            send_new_account_email(instance, password)

accounts/tasks.py

@@ -1,25 +0,0 @@
-from celery import shared_task
-from django.contrib.auth import get_user_model
-from core.utils import send_html_email
-
-
-@shared_task
-def send_new_student_email(user_pk, password):
-    user = get_user_model().objects.get(pk=user_pk)
-    send_html_email(
-        subject="Your Dj LMS account confirmation and credentials",
-        recipient_list=[user.email],
-        template="accounts/email/new_student_account_confirmation.html",
-        context={"user": user, "password": password},
-    )
-
-
-@shared_task
-def send_new_lecturer_email(user_pk, password):
-    user = get_user_model().objects.get(pk=user_pk)
-    send_html_email(
-        subject="Your Dj LMS account confirmation and credentials",
-        recipient_list=[user.email],
-        template="accounts/email/new_lecturer_account_confirmation.html",
-        context={"user": user, "password": password},
-    )

accounts/utils.py

@@ -1,6 +1,8 @@
 from datetime import datetime
 from django.contrib.auth import get_user_model
 from django.conf import settings
+import threading
+from core.utils import send_html_email
 
 
 def generate_password():
@@ -27,3 +29,34 @@ def generate_student_credentials():
 
 def generate_lecturer_credentials():
     return generate_lecturer_id(), generate_password()
+
+
+class EmailThread(threading.Thread):
+    def __init__(self, subject, recipient_list, template_name, context):
+        self.subject = subject
+        self.recipient_list = recipient_list
+        self.template_name = template_name
+        self.context = context
+        threading.Thread.__init__(self)
+
+    def run(self):
+        send_html_email(
+            subject=self.subject,
+            recipient_list=self.recipient_list,
+            template=self.template_name,
+            context=self.context,
+        )
+
+
+def send_new_account_email(user, password):
+    if user.is_student:
+        template_name = "accounts/email/new_student_account_confirmation.html"
+    else:
+        template_name = "accounts/email/new_lecturer_account_confirmation.html"
+    email = {
+        "subject": "Your Dj LMS account confirmation and credentials",
+        "recipient_list": [user.email],
+        "template_name": template_name,
+        "context": {"user": user, "password": password},
+    }
+    EmailThread(**email).start()

accounts/views.py

@@ -283,6 +283,7 @@ def staff_add_view(request):
         form = StaffAddForm(request.POST)
         first_name = request.POST.get("first_name")
         last_name = request.POST.get("last_name")
+        email = request.POST.get("email")
 
         if form.is_valid():
 
@@ -293,7 +294,9 @@ def staff_add_view(request):
                 + first_name
                 + " "
                 + last_name
-                + " has been created.",
+                + " has been created. An email with account credentials will be sent to "
+                + email
+                + " within a minute",
             )
             return redirect("lecturer_list")
     else:

config/__init__.py

@@ -1,5 +0,0 @@
-# This will make sure the app is always imported when
-# Django starts so that shared_task will use this app.
-from .celery import app as celery_app
-
-__all__ = ("celery_app",)

config/celery.py

@@ -1,22 +0,0 @@
-import os
-
-from celery import Celery
-
-# Set the default Django settings module for the 'celery' program.
-os.environ.setdefault("DJANGO_SETTINGS_MODULE", "config.settings")
-
-app = Celery("config")
-
-# Using a string here means the worker doesn't have to serialize
-# the configuration object to child processes.
-# - namespace='CELERY' means all celery-related configuration keys
-#   should have a `CELERY_` prefix.
-app.config_from_object("django.conf:settings", namespace="CELERY")
-
-# Load task modules from all registered Django apps.
-app.autodiscover_tasks()
-
-
-@app.task(bind=True, ignore_result=True)
-def debug_task(self):
-    print(f"Request: {self.request!r}")

config/settings.py

@@ -237,15 +237,3 @@ STATICFILES_STORAGE = "whitenoise.storage.CompressedManifestStaticFilesStorage"
 
 STUDENT_ID_PREFIX = config("STUDENT_ID_PREFIX", "ugr")
 LECTURER_ID_PREFIX = config("LECTURER_ID_PREFIX", "lec")
-
-CACHES = {
-    "default": {
-        "BACKEND": "django.core.cache.backends.redis.RedisCache",
-        "LOCATION": "redis://127.0.0.1:6379",
-    }
-}
-
-# celery setting.
-CELERY_BROKER_URL = "redis://localhost:6379/0"
-CELERY_CACHE_BACKEND = "default"
-CELERY_BROKER_CONNECTION_RETRY_ON_STARTUP = True

requirements/base.txt

@@ -24,11 +24,6 @@ django-jet-reboot==1.3.5
 # Environment variable
 python-decouple==3.8
 
-# Celery/redis
-celery==5.4.0
-redis==5.0.4
-hiredis==2.3.2
-
 # Payments
 stripe==5.5.0
 gopay==2.0.1

templates/core/index.html

@@ -40,19 +40,7 @@
 </div>
 {% endif %}
 
-{% if messages %}
-{% for message in messages %}
-{% if message.tags == 'error' %}
-<div class="alert alert-danger">
-    <i class="fas fa-exclamation-circle"></i>{{ message }}
-</div>
-{% else %}
-<div class="alert alert-success">
-    <i class="fas fa-check-circle"></i>{{ message }}
-</div>
-{% endif %}
-{% endfor %}
-{% endif %}
+{% include 'snippets/messages.html' %}
 
 <div>
     <div class="title-1">News &amp; Events</div>

templates/snippets/messages.html

@@ -2,16 +2,16 @@
 {% if messages %}
     {% for message in messages %}
         {% if message.tags == 'error' %}
-            <div class="alert py-2 alert-danger">
-                <i class="fas fa-exclamation-circle me-2"></i>{{ message }}
+            <div class="alert py-2 alert-danger d-flex align-items-center">
+                <i class="fas fa-exclamation-circle me-2" style="min-width: 35px;"></i><span>{{ message }}</span>
             </div>
         {% elif message.tags == 'warning' %}
-            <div class="alert py-2 alert-warning">
-                <i class="fas fa-exclamation-circle me-2"></i>{{ message }}
+            <div class="alert py-2 alert-warning d-flex align-items-center">
+                <i class="fas fa-exclamation-circle me-2" style="min-width: 35px;"></i><span>{{ message }}</span>
             </div>
         {% else %}
-            <div class="alert py-2 alert-success">
-                <i class="fas fa-check-circle me-2"></i>{{ message }}
+            <div class="alert py-2 alert-success d-flex align-items-center">
+                <i class="fas fa-check-circle me-2" style="min-width: 35px;"></i><span>{{ message }}</span>
             </div>
         {% endif %}
     {% endfor %}