System Requirements Document (SRD) for winter-pdf

1. Introduction

The winter-pdf project is a PDF-to-Word conversion application designed to provide users with a seamless and efficient way to transform PDF documents into editable Word files. This tool is tailored for users in India (IN), ensuring locale-specific considerations such as timezone (IST) and potential language support for regional documents. The system aims to deliver high-quality conversions with minimal user effort, leveraging modern technologies and APIs.

2. System Overview

The winter-pdf application will serve as a lightweight, user-friendly platform for converting PDF files into Word documents. The system will focus on accuracy, speed, and ease of use, ensuring that users can upload their files and receive editable Word documents in just a few clicks. The application will utilize advanced APIs and libraries to handle the conversion process while maintaining the integrity of the original document's formatting.

Key features include:

• Direct file uploads from the user's device.
• High-fidelity PDF-to-Word conversion.
• Support for various document sizes and formats.
• A clean, intuitive user interface.

3. Functional Requirements

• As a User, I should be able to upload a PDF file for conversion.
• As a User, I should be able to download the converted Word document.
• As a User, I should receive a notification once the conversion is complete.
• As a User, I should be able to view a progress bar during the conversion process.
• As a User, I should be able to convert password-protected PDFs by entering the password.
• As a User, I should be able to see a history of my recent conversions.
• As a User, I should be able to delete my uploaded files after conversion.
• As a User, I should be able to access the application on both web and mobile platforms.

4. User Personas

4.1 Regular User

• Description: Individuals who need to convert PDF files to Word documents for personal or professional use.
• Goals: Quick and accurate conversions with minimal hassle.
• Pain Points: Loss of formatting during conversion, slow processing times.

4.2 Administrator

• Description: System administrators responsible for maintaining the application.
• Goals: Ensure system uptime, monitor user activity, and manage backend operations.
• Pain Points: Debugging issues, ensuring API reliability.

5. Visuals Colors and Theme

Color Palette

The winter-pdf application will feature a modern and professional aesthetic with a winter-inspired theme. Below is the unique color palette:

• Background: #F5F9FF (Soft Winter Blue)
• Surface: #FFFFFF (Pure White)
• Text: #2C3E50 (Deep Charcoal)
• Accent: #3498DB (Frosty Blue)
• Muted: #BDC3C7 (Light Gray)

This palette ensures a clean and calming user experience, reflecting the simplicity and efficiency of the application.

6. Signature Design Concept

The winter-pdf homepage will feature an interactive snowflake animation that reacts to user interactions.

Concept Details:

• Visuals: The homepage will display a large, dynamic snowflake in the center of the screen. Each branch of the snowflake represents a feature (e.g., Upload, History, Settings).
• Interactions: Hovering over a branch will cause it to glow and expand slightly, revealing a tooltip with the feature name. Clicking on a branch will smoothly transition the user to the corresponding section of the app.
• Animations: Subtle snowfall will occur in the background, creating a serene winter atmosphere. The snowflake will rotate gently when idle, adding a sense of motion and life to the page.
• Transitions: Smooth fade-ins and slide animations will be used for page transitions, enhancing the overall user experience.

This design concept ensures that the winter-pdf application leaves a lasting impression on users while maintaining a functional and intuitive interface.

7. Non-Functional Requirements

• The system should process conversions within 10 seconds for files under 10MB.
• The application should support concurrent users without performance degradation.
• The system should ensure data privacy by automatically deleting uploaded files after 24 hours.
• The application should be responsive and accessible on both desktop and mobile devices.
• The system should support PDF files in multiple languages, including Indian regional languages.

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

AI Tools

• Langchain
• Litellm for LLM Routing

Orchestration

• Docker
• docker-compose
• Kubernetes

9. Assumptions and Constraints

Assumptions

• Users will primarily upload PDF files from their local devices.
• The majority of users will require English-language support, with optional support for Indian regional languages.
• The system will operate in the IST timezone.

Constraints

• File size limit for uploads will be capped at 50MB.
• Conversion accuracy may vary for highly complex PDFs with intricate formatting.
• The application will require an active internet connection for API-based conversions.

10. Glossary

• PDF: Portable Document Format, a file format used to present documents.
• Word Document: A file format used by Microsoft Word, typically with a .docx extension.
• API: Application Programming Interface, a set of tools for building software applications.
• IST: Indian Standard Time, the time zone used in India.
• Responsive Design: An approach to web design that ensures a site works well on various devices and screen sizes.