# Project Handover Report for Quadvendor

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## 1. Project Overview

The project is a **Point of Sale (POS)** and **inventory management system**, designed as a **Software as a Service (SaaS)** product. This application is a comprehensive full-stack solution developed using **Ruby on Rails**, currently running **Rails 7** and **Ruby 3.2**. The application leverages several modern technologies and frameworks to ensure robust performance, scalability, and maintainability.

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## 2. Technical Stack

- **Backend Framework:** Ruby on Rails 7
- **Programming Language:** Ruby 3.2
- **Database:** PostgreSQL
- **Caching:** Redis
- **Frontend Framework:** Stimulus JS
- **Views:** ERB templates with Bootstrap 4
- **Charts and Graphs:** Chartkick
- **PDF Generation:** Wicked PDF (Note: Consider replacing due to lack of maintenance)
- **Asset Pipeline:** Webpacker (Note: Consider migrating to Propshaft)

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## 3. Integration with Smartply Connect

The POS project also serves as the **backend application** for a separate e-commerce project called **Smartply Connect**, providing seamless integration and data synchronization between the two platforms.

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## 4. Authentication and Authorization

- **Authentication:** Devise
- **Authorization:** Pundit

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## 5. Business Logic Implementation

**Active Interaction Gem:** Utilized to encapsulate business logic in a modular and testable manner.

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## 6. Email Services

**Mailgun:** Used for handling all email-related functionalities, providing a robust and scalable solution for email delivery.

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## 7. Testing Framework

- **Unit Tests:** Minitest
- **Test Data:** Factory Bot Gem

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## 8. API Serialization

**Jbuilder:** Used for JSON API serialization, facilitating easy and flexible JSON creation.

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## 9. Filtering and Querying

**Allfutures Gem:** Currently used for filtering data (Note: This gem is no longer maintained. Consider replacing it with query objects for better maintainability and performance).

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## 10. Administrative Interface

**Administrate Gem:** Used for building a custom admin dashboard, providing an easy-to-use interface for managing the application’s data.

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## 11. Background Jobs and Scheduling

- **Sidekiq:** Utilized for background job processing, ensuring efficient handling of asynchronous tasks.
- **Sidekiq Scheduler:** Used for managing scheduled and recurring jobs, including Cron jobs.

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## 12. Notifications

**Noticed Gem:** Handles application notifications. Consider upgrading to the recent v2 for enhanced stability and additional features, including support for iOS notifications.

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## 13. Payment Integration

**Payment Gateways:** The application currently integrates with Mpesa and Flutterwave for handling transactions. It is recommended to consider migrating to Pesapal for potentially better service and support.

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## 14. Recommendations and Future Considerations

1. **Migration from Webpacker to Propshaft:** Given that Webpacker is no longer supported and Propshaft is the default for Rails 8, it is advisable to migrate the asset pipeline to Propshaft to ensure future compatibility and support.

2. **Replacing Allfutures Gem:** Since the Allfutures gem is no longer maintained, replacing it with query objects will improve code maintainability and performance.

3. **Upgrading the Noticed Gem:** Moving to the latest version of the Noticed gem will provide additional notification options and greater stability, especially for mobile notifications.

4. **PDF Generation Solution:** Given that Wicked PDF is no longer maintained, it is important to explore alternative solutions for generating PDFs, such as Prawn or PDFKit, to ensure continued support and functionality.

5. **Payment Gateway Migration:** Evaluate the benefits of migrating from Mpesa and Flutterwave to Pesapal for processing payments, considering factors such as transaction fees, reliability, and support.

6. **Review of Business Logic:** Regularly review and refactor the business logic implemented using the Active Interaction gem to ensure it remains efficient and up-to-date with business requirements.

7. **Maintaining Dependencies:** Regularly update gems and dependencies to their latest versions to benefit from security patches, new features, and improved performance.

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## 15. Conclusion

Quadvendor is a robust and feature-rich application built with modern technologies. While the current implementation is stable and functional, addressing the recommendations outlined above will help maintain the application's reliability, performance, and security in the long term. Continuous monitoring and periodic updates are essential to ensure the system evolves with technological advancements and business needs.

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