System Requirements Document (SRD)

Project Name: jolly-chat

1. Introduction

The jolly-chat project aims to develop a full-featured chat application tailored for users in India, providing seamless real-time messaging, robust user authentication, and efficient contact management capabilities. Designed to rival popular messaging platforms like WhatsApp Messenger, jolly-chat will focus on delivering a secure, intuitive, and feature-rich experience for its users.

This document outlines the system requirements for jolly-chat, ensuring clarity and alignment for all stakeholders involved in its development.

2. System Overview

jolly-chat is envisioned as a modern, scalable, and user-friendly chat application that supports:

• Real-time messaging with multimedia support (text, images, videos, and voice notes).
• Secure user authentication and account management.
• Contact management, including syncing, adding, and organizing contacts.
• Group chats, broadcast messages, and status updates.
• End-to-end encryption for privacy and security.

The system will cater to a diverse user base, ensuring compatibility across web and mobile platforms. It will leverage cutting-edge technologies to provide a fast, reliable, and engaging communication experience.

3. Functional Requirements

As User:

• I should be able to register and log in securely using my phone number or email.
• I should be able to send and receive real-time messages, including text, images, videos, and voice notes.
• I should be able to create, join, and manage group chats.
• I should be able to update my profile picture, status, and personal information.
• I should be able to search and add contacts to my contact list.
• I should be able to block or report users for inappropriate behavior.
• I should be able to view and manage my chat history.
• I should be able to sync my contacts with the app.
• I should be able to set custom notifications for specific chats.
• I should be able to archive or delete chats.

As Admin:

• I should be able to manage user accounts, including banning or unbanning users.
• I should be able to monitor flagged content or reported users.
• I should be able to send announcements or notifications to all users.
• I should be able to view analytics and usage statistics.

4. User Personas

1. Regular User

• Description: Everyday users who use the app for personal communication.
• Goals: Seamless messaging, privacy, and ease of use.
• Pain Points: Security concerns, app crashes, or slow performance.

2. Admin

• Description: System administrators responsible for maintaining the platform.
• Goals: Ensure smooth operation, manage users, and address issues promptly.
• Pain Points: Lack of tools for monitoring and managing the system effectively.

5. Visuals Colors and Theme

Color Palette for jolly-chat:

• Background: #F5F9FF (Soft Sky Blue)
• Surface: #FFFFFF (Pure White)
• Text: #2C3E50 (Deep Charcoal)
• Accent: #FF6F61 (Vibrant Coral)
• Muted Tones: #B0BEC5 (Cool Gray)

Theme Direction:

The theme will emphasize a clean, modern, and friendly interface with a focus on usability and accessibility. The vibrant coral accent will be used sparingly to highlight key actions and notifications, while the soft sky blue background will create a calming and inviting atmosphere.

6. Signature Design Concept

Interactive Chat Universe

The homepage of jolly-chat will feature an interactive galaxy map where each star represents a feature or section of the app. Users can hover over stars to see animated tooltips explaining the feature (e.g., "Real-Time Messaging," "Group Chats," "End-to-End Encryption").

• Animation: Stars will gently pulse and shimmer, creating a dynamic and engaging effect.
• Transitions: Clicking on a star will zoom into a specific feature, transitioning smoothly to a detailed explanation or demo.
• Micro-Interactions: Subtle sound effects and haptic feedback (on mobile) will enhance the experience.
• Color Shifts: The galaxy background will subtly change hues based on the time of day, providing a personalized touch.

This concept will make the app's landing page unforgettable, drawing users into the jolly-chat universe.

7. Non-Functional Requirements

• Performance: The system must support at least 10,000 concurrent users with minimal latency.
• Scalability: The architecture should allow for seamless scaling to accommodate future growth.
• Security: All communications must be end-to-end encrypted. User data must be stored securely and comply with local data protection laws (e.g., India's IT Act).
• Availability: The system should maintain 99.9% uptime.
• Localization: The app should support multiple languages, with Hindi and English as defaults.
• Cross-Platform Compatibility: The app must work seamlessly on Android, iOS, and web browsers.

8. Tech Stack

Frontend:

• React for Web
• React Native for Mobile App

Backend:

• Python
• FastAPI

Database:

• MySQL (with Alembic for migrations)

AI Models:

• GPT 5.4 for user-friendly responses
• Claude 4.6 Opas for academic or coding work

AI Tools:

• Litellm for LLM Routing
• Langchain

Orchestration:

• Docker (local)
• Kubernetes (server-side)

9. Assumptions and Constraints

• Assumptions:

  • Users will have access to stable internet connections.
  • The majority of users will access the app via mobile devices.
  • The app will initially target users in India, with potential for global expansion.

• Constraints:

  • Compliance with India's data protection regulations is mandatory.
  • The app must be lightweight to ensure compatibility with low-end devices.

10. Glossary

• Real-Time Messaging: Instant communication between users without noticeable delay.
• End-to-End Encryption: A security measure ensuring that only the sender and recipient can read the messages.
• LLM Routing: A method for directing queries to the most appropriate large language model.
• Orchestration: The automated configuration, coordination, and management of computer systems and software.