Community Alert

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  It's just Screenshot from VScode of just backend code working properly

Inspiration

 Frustrated by discovering local emergencies too late. Wanted instant, hyper-local alerts for things like    road closures, power outages, and safety hazards.

What it does

    Real-time backend that lets users report local incidents and instantly alerts only nearby people via             WebSocket. REST API for integration. Think "digital neighborhood watch.

How we built it

Rust + Actix Web 4.0
 WebSocket for real-time alerts
In-memory storage with DashMap
Custom geospatial distance calculations
Async/await throughout

Challenges we ran into

WebSocket session management across threads
Geospatial filtering performance
Race conditions in concurrent data access
Type system complexities in Rust

Accomplishments that we're proud of

 Sub-second alert delivery
 Zero unsafe Rust code
 Both WebSocket + REST APIs working
 No database dependency
 Clean, maintainable architecture

What we learned

Rust's ownership model prevents entire classes of bugs Actix Web's actor system for WebSocket management Spatial indexing techniques Real-time system design patterns

What's next for Community Alert

User authentication (JWT) Incident verification (crowd-sourced) Database persistence Mobile app frontend Admin dashboard Deployment to cloud

Built With

• actix
• cargo
• chrono
• dashmap
• linux
• rust
• web4.0