code-scanner-driver 0.1.0

# code-scanner-driver


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A lightweight Rust driver for **barcode scanners** and **keyboard-emulated input**, featuring:

- **GTIN validation** (GTIN-8/12/13/14)
- **Async streaming using Tokio**
- **Burst detection** for grouping fast keystrokes into scan events
- **Cross-platform global keyboard listener** via `rdev`
- Supports all USB/HID scanners that behave like a keyboard

---

## Features


- **Scanner input detection**  
  Groups rapid keystrokes into a single scan event.

- **GTIN validation**  
  Checks GTIN-8 / GTIN-12 / GTIN-13 / GTIN-14 via checksum.

- **Async stream API**  
  Uses `tokio_stream` for ergonomic event consumption.

- **Global keyboard hook**  
  Powered by `rdev`, works across platforms.


---

## Installation


Add to your `Cargo.toml`:

```toml
[dependencies]
code-scanner-driver = "0.1"
```

---

## Quick Start


```rust
use code_scanner_driver::ScannerStream;
use tokio_stream::StreamExt;

#[tokio::main]

async fn main() {
  let mut stream = ScannerStream::new().unwrap();
  println!("Listening for scans...");

  while let Some(event) = stream.next().await {
    println!("Scan received: {:?}", event);
  }
}
```

---

## GTIN Validation Example


```rust
use code_scanner_driver::validate_gtin;

let code = "5901234123457";

match validate_gtin(code) {
  Some(kind) => println!("{} is a valid {}", code, kind),
  None => println!("{} is NOT a valid GTIN", code),
}
```


### Supported formats:

- GTIN-8
- GTIN-12
- GTIN-13
- GTIN-14