Vision Document
9Line Spaces System
Table of Contents
Summary - Page 1
Introduction - Page 2
Problem Description - Page 2
Descriptions of Stakeholders and Users - Page 2
User Summary - Page 2
Product Overview - Page 3
Product Perspective - Page 3
Assumptions and Dependencies - Page 3
Main Product Capabilities/Requirements - Page 4
Main Non-Functional Requirements (NFR) of the Product - Page 5
Chosen Technology Stack - Page 5
Proposal Development Phases - Page 6
Introduction
This document aims to collect, analyze, and define high-level system needs and resources. It focuses on the necessary resources for involved users and the reasons behind these needs. Details on how the system satisfies these needs will be described in the use case and supplementary specifications.
The 9line Spaces system is a space booking platform that allows users to schedule the use of spaces (such as pools, party halls, etc.) on specific dates and times, implementing a clean architecture (Clean Architecture) with Domain Driven Design (DDD).
Problem Description
The current space booking process is entirely manual, relying on traditional methods such as phone calls, emails, and physical calendars. This approach demands significant effort and repetitive work from space owners and users. New bookings are created manually each time, but there are no clear strategies for storing and retrieving saved information, leading to a higher possibility of errors during the booking process, double bookings, and lack of centralized management.
The absence of a digital platform results in:
Difficulty in managing multiple spaces
Lack of real-time availability information
Manual scheduling conflicts
No automated notifications
Limited user experience
Difficulty in tracking and analyzing usage patterns
Descriptions of Stakeholders and Users
This section provides a profile of the main users involved in the project and the key problems the proposed solution aims to address. It does not detail specific user requests or requirements, as those are captured in separate stakeholder request artifacts. Instead, it provides the foundation and justification for why the requirements are necessary.
User Summary
Administrator
User with the highest degree of permission within the system.
- Manage users - Manage all spaces - Monitor system performance - Configure system settings - Manage roles and permissions
Manager
User responsible for managing specific spaces and their bookings.
- Manage spaces - Approve/reject appointments - Manage space information - View space analytics - Handle user inquiries
User
End user who books spaces for personal or business use.
- Browse available spaces - Make appointments - Rate spaces - Manage personal bookings - Receive notifications
Product Overview
This section provides a high-level view of the product's features, exposing its main capabilities, interfaces with other systems, and configurations.
The image below demonstrates, at a high level of abstraction, the proposed solution's architecture including the system's main components.
Image 1 - Overview
┌─────────────────┐ ┌─────────────────┐ ┌─────────────────┐
│ Web Client │ │ Mobile App │ │ Admin Panel │
│ (React/Next) │ │ (React Native)│ │ (Next.js) │
└─────────────────┘ └─────────────────┘ └─────────────────┘
│ │ │
└───────────────────────┼───────────────────────┘
│
┌─────────────────┐
│ API Gateway │
│ (Express.js) │
└─────────────────┘
│
┌─────────────────┐
│ Core Modules │
│ - Users │
│ - Spaces │
│ - Appointments│
│ - Ratings │
│ - RBAC │
│ - Notifications│
└─────────────────┘
│
┌───────────────────────┼───────────────────────┐
│ │ │
┌─────────────────┐ ┌─────────────────┐ ┌─────────────────┐
│ PostgreSQL │ │ Redis │ │ External │
│ Database │ │ Cache │ │ Services │
└─────────────────┘ └─────────────────┘ └─────────────────┘Product Perspective
The proposed solution aims to automate the space booking and management process, including all tasks and subtasks related to space scheduling. The solution's objective is to maximize the replacement of manual work and automate repetitive tasks, integrating all functionalities into a single tool and allowing access through network communication.
End-users will access the system's functionalities through a browser or mobile application, without needing to install any software on their machine. The system provides a seamless experience across multiple platforms.
Assumptions and Dependencies
The proposed solution considers the existence of an infrastructure capable of accommodating the developed system, which can be a proprietary infrastructure or use cloud deployment platforms.
Regarding the client application, its only dependency will be internet access, as without it, interaction between the client application and the rest of the system will not be possible.
The system depends on external services for:
Email notifications (SMTP services)
SMS notifications (SMS gateway services)
Push notifications (Firebase/APNS)
Payment processing (if applicable)
Maps and geolocation services
Main Product Capabilities/Requirements
The correct communication with external services (specifically notification services) is essential for the development of the respective functionality. The existence of interfaces for this communication is essential for the development of the respective functionality.
The main functionalities necessary for the proposed solution are listed below:
FT 01 - User Authentication/Authorization
Only duly authorized users should be able to access the functionalities provided by the system. The system implements JWT-based authentication with role-based access control.
FT 02 - Manage Users
The system provides user management functionalities (create, alter, exclude users) and the ability to personalize different access levels for each user. The system supports three main user types: Administrator, Manager, and User.
FT 03 - Manage Spaces
The functionality to manage all types of spaces (pools, party halls, meeting rooms, etc.), allowing searches, alterations, and removals. Each space includes detailed information such as photos, rules, amenities, and location.
FT 04 - Manage Appointments
The functionality to manage all types of appointments, allowing users to book spaces for specific dates and times. The system includes conflict detection, approval workflows, and change management.
FT 05 - Data Visualization
The functionality to visualize the booking status over different temporal moments (daily, monthly, annual), presenting space usage, revenue, and total values.
FT 06 - Scenario Projection
The functionality to create different scenarios based on space availability and booking patterns, helping managers optimize space utilization.
FT 07 - Manage Bank Accounts
The functionality to control all bank accounts and their configurations related to payment processing and financial management.
FT 08 - Manage Investments
The functionality to register and control investments related to space improvements and maintenance, and to visualize them over different temporal moments.
FT 09 - Manage Events
The functionality to register and control expenses originating from realized and scheduled events, and to visualize them over different temporal moments.
Main Non-Functional Requirements (NFR) of the Product
Performance Requirements
Response Time: API endpoints must respond within 200ms for 95% of requests
Throughput: System must handle 1000 concurrent users
Availability: 99.9% uptime requirement
Scalability: Horizontal scaling capability
Security Requirements
Authentication: JWT-based authentication with refresh tokens
Authorization: Role-based access control (RBAC)
Data Protection: Encryption at rest and in transit
Input Validation: Comprehensive input validation and sanitization
Reliability Requirements
Error Handling: Graceful error handling with meaningful messages
Logging: Structured logging for monitoring and debugging
Health Checks: Comprehensive health check endpoints
Graceful Shutdown: Proper cleanup of resources
Usability Requirements
Responsive Design: Support for desktop, tablet, and mobile devices
Accessibility: WCAG 2.1 AA compliance
Internationalization: Support for multiple languages
User Experience: Intuitive and user-friendly interface
Maintainability Requirements
Code Quality: Clean architecture with domain-driven design
Testing: Comprehensive test coverage (unit, integration, e2e)
Documentation: Complete API documentation with Swagger
Monitoring: Application performance monitoring and alerting
Chosen Technology Stack
Backend
Runtime: Node.js (v18+)
Framework: Express.js
Database: PostgreSQL with Prisma ORM
Cache: Redis
Authentication: JWT
Testing: Vitest
Logging: Winston
Validation: Zod
Frontend
Web Application: Next.js with React
Mobile Application: React Native
Styling: Tailwind CSS
State Management: Zustand/Redux
Testing: Jest and React Testing Library
Infrastructure
Containerization: Docker
Orchestration: Docker Compose
CI/CD: GitHub Actions
Monitoring: Application performance monitoring
Documentation: Swagger/OpenAPI
External Services
Email: SMTP services (SendGrid, AWS SES)
SMS: SMS gateway services
Push Notifications: Firebase Cloud Messaging
Maps: Google Maps API
Payment: Stripe (if applicable)
Proposal Development Phases
Phase 1: Foundation (Weeks 1-4)
Week 1-2: Project setup and architecture definition
Week 3-4: Core infrastructure and database design
Deliverables: Project structure, database schema, basic API setup
Phase 2: Core Features (Weeks 5-12)
Week 5-6: User authentication and authorization
Week 7-8: Space management functionality
Week 9-10: Appointment booking system
Week 11-12: Rating and review system
Deliverables: Core API endpoints, basic frontend, authentication system
Phase 3: Advanced Features (Weeks 13-20)
Week 13-14: RBAC system implementation
Week 15-16: Notification system
Week 17-18: Data visualization and analytics
Week 19-20: Mobile application development
Deliverables: Complete backend, web application, mobile app
Phase 4: Testing and Deployment (Weeks 21-24)
Week 21-22: Comprehensive testing and bug fixes
Week 23-24: Production deployment and monitoring setup
Deliverables: Production-ready system, monitoring, documentation
Phase 5: Optimization and Enhancement (Weeks 25-28)
Week 25-26: Performance optimization
Week 27-28: Additional features and improvements
Deliverables: Optimized system, additional features, user feedback integration
Version: 1.0.0 Last Update: July 2025 Author: Antonio Silva Email: contato@antoniobsilva.com.br
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