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tiennm99
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The POST handler read from gameSessions, an in-memory Map removed in the Redis migration, so every call threw a ReferenceError and returned an opaque 500. Read through getGameSession instead, and answer 400 on a missing sessionId, 404 when the session is gone, 500 on a store error. Parsing the body no longer throws out of the handler on malformed JSON. Log the underlying Mapillary error before returning the generic coverage message, so an API outage is not silently reported as a city without street view.
VNGeoGuessr
A GeoGuessr clone focused on Vietnamese locations with accurate boundary detection and anti-cheat security. Play geolocation guessing games across 5 Vietnamese locations using real street-level imagery.
🎮 Features
- 5 Vietnamese Locations: Ha Noi, Da Nang, Ho Chi Minh, Da Lat, Duc Hoa (Long An)
- 360° Street View: Mapillary panoramic images with PhotoSphere viewer
- Anti-Cheat Security: Server-side session management prevents cheating
- Distance-Based Scoring: 0-5 point system based on accuracy
- Persistent Leaderboards: Redis-powered top 200 player rankings
- Accurate Boundaries: Nominatim API + Turf.js for precise city detection
📚 Documentation
For detailed information about this project, see the documentation in /docs/:
- Project Overview - Project summary and key characteristics
- Features - Complete feature list and game mechanics
- Tech Stack - Technology stack and dependencies
- Development Guidelines - Development setup and coding standards
- Game Flow - Complete gameplay flow documentation
- Project Structure - Codebase organization and architecture
🚀 Getting Started
Prerequisites
- Node.js 18+
- npm 11+
- Redis server (for leaderboards)
Development
# Install dependencies
npm install
# Start development server
npm run dev
# Build for production
npm run build
# Start production server
npm start
# Run linting
npm run lint
Open http://localhost:3000 to play the game.
🏗️ Built With
- Frontend: Next.js 15 + React 19 + Tailwind CSS 4
- Street View: Mapillary API + PhotoSphere Viewer
- Maps: Leaflet + OpenStreetMap
- Geographic Data: Nominatim API + Turf.js
- Storage: Redis (leaderboards) + In-memory sessions
- UI Components: shadcn/ui
🎯 How to Play
- Enter your username
- Select a Vietnamese location
- View the 360° street panorama
- Place your guess on the map
- Earn points based on accuracy (closer = more points)
- Compete for the top 200 leaderboard spots!
📋 Development Notes
- JavaScript Only: No TypeScript files
- Individual Parameters: Functions use separate parameters, not object destructuring
- Server-Side Security: Game coordinates never sent to client
- Session Management: Automatic cleanup after 30 minutes
🤝 Contributing
This project follows specific development guidelines. Please read the Development Guidelines before contributing.