System Design: Google Calendar

Creating a calendar application like Google Calendar involves careful planning, architecture, and optimization. Let’s walk through the RADIO method (Requirements, Architecture, Data model, Interface, Optimization) to design a simplified version of a Google Calendar-like app. 🚀

google calendar

1. Requirements 📋

Functional Requirements:

1. Authentication: Support OAuth 2.0 or Custom Login API for user authentication. 🔐
2. Calendar View: Provide multiple views such as Day, Week, Month, and Year. 🗓️
3. Event Management: CRUD (Create, Read, Update, Delete) operations for events. ✍️
4. RSVP: Allow users to RSVP to events. 🎟️
5. Push Notifications: Notify users of upcoming events. 🔔

Non-Functional Requirements:

1. Responsive Design: Ensure the app works seamlessly on mobile and desktop. 📱💻
2. Accessibility: Design for accessibility, ensuring users with disabilities can interact easily. ♿
3. Offline Support: Implement offline support using PWA (Progressive Web App) and Service Workers. 📶
4. Web Security: Prevent XSS (Cross-Site Scripting) and other vulnerabilities. 🛡️
5. Logging & Monitoring: Use tools like Sentry for error tracking and A/B testing for feature experimentation. 📊
6. Globalization: Support multiple languages and regions. 🌍
7. Performance: Focus on pagination, caching, and optimizing large datasets.

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2. Architecture 🏛️

Rendering:

• CSR (Client-Side Rendering) will be used to enhance the app’s responsiveness and interactivity. ⚡

Framework:

• We’ll use ReactJS to build the app due to its component-based structure and state management capabilities. ⚛️

CSS & Preprocessing: