Afeez1131

Notification System — Technical Specification

Author: Afeez Lawal
Scope: Multi-channel notification system (push, SMS, email) for 1M+ users

---

1. Problem Statement

Design a notification system that delivers push, SMS, and email notifications reliably at scale, with no duplicate sends, no missed sends, and graceful degradation when third-party providers fail.

Afeez1131

import os
import glob

def delete_migrations(app_name):
    # Get the path to the migrations folder of the app
    migrations_path = os.path.join(app_name, 'migrations')

    # Check if the migrations folder exists
    if os.path.exists(migrations_path):
        # Find all migration files (except __init__.py) in the migrations folder

Afeez1131

from django.db import models
from django.utils import timezone
from django.core.validators import MinValueValidator, MaxValueValidator

class ThreatCategory(models.Model):
    name = models.CharField(max_length=255)
    abbreviation = models.CharField(max_length=50, blank=True, null=True)
    
    def __str__(self):
        return self.name

Afeez1131

from django.core.management.base import BaseCommand

from rq.registry import FailedJobRegistry
from django_rq.queues import get_queue
from django_rq.utils import get_jobs


class Command(BaseCommand):
    help = 'Delete failed jobs from Django RQ.'

Afeez1131

import math

def custom_round(number):
    # Multiply by 100 and check if the last two digits are >= 45
    decimal_part = (number * 100) % 100
    
    # If the decimal part is >= 45, round up
    if decimal_part >= 45:
        return math.ceil(number)
    else:

Afeez1131

#!/usr/bin/env python
""" Short description of this Python module.

Longer description of this module.

This program is free software: you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation, either version 3 of the License, or (at your option) any later
version.

Afeez1131

import os
import glob

def delete_migrations(app_name):
    # Get the path to the migrations folder of the app
    migrations_path = os.path.join(app_name, 'migrations')

    # Check if the migrations folder exists
    if os.path.exists(migrations_path):
        # Find all migration files (except __init__.py) in the migrations folder

Afeez1131

Form Tests:

1. Empty Form:

   • Test an empty form to ensure it is invalid.
   • Verify that the form errors match the expected errors for required fields.

2. Form with Invalid Data:

   • Test the form with intentionally invalid data.
   • Check that the form is marked as invalid and contains appropriate error messages.

Afeez1131

// Run this in the F12 javascript console in chrome
// if a redirect happens, the page will pause
// this helps because chrome's network tab's
// "preserve log" seems to technically preserve the log
// but you can't actually LOOK at it...
// also the "replay xhr" feature does not work after reload
// even if you "preserve log".

window.addEventListener("beforeunload", function() { debugger; }, false)

Afeez1131

# Byte-compiled / optimized / DLL files
__pycache__/
*.py[cod]
*$py.class

# C extensions
*.so

# Distribution / packaging
.Python