barcode-utils/src/main.rs

use reqwest::Client;
use serde::Deserialize;
use serial::prelude::*;
use std::io;
use std::str::from_utf8;
use std::time::Duration;

struct BookData {
  title: String,
  authors: Vec<String>,
  thumbnail: String,
  description: String,
}
#[allow(unused)]
#[derive(Debug, Deserialize)]
struct BookRoot {
  items: Vec<Item>,
}

#[allow(unused)]
#[derive(Debug, Deserialize)]
struct Item {
  volumeinfo: VolumeInfo,
}

#[allow(unused)]
#[derive(Debug, Deserialize)]
struct VolumeInfo {
  title: String,
  authors: Option<Vec<String>>,
  description: Option<String>,
  imagelinks: Option<ImageLinks>,
}

#[allow(unused)]
#[derive(Debug, Deserialize)]
struct ImageLinks {
  thumbnail: Option<String>,
}

#[tokio::main]
async fn main() {
  let mut port = serial::open("/dev/ttyACM0").unwrap();
  interact(&mut port).await.unwrap();
}

async fn interact<T: SerialPort>(port: &mut T) -> io::Result<()> {
  port.reconfigure(&|settings| {
    settings.set_baud_rate(serial::Baud9600)?;
    settings.set_char_size(serial::Bits8);
    settings.set_parity(serial::ParityNone);
    settings.set_stop_bits(serial::Stop1);
    settings.set_flow_control(serial::FlowNone);
    Ok(())
  })?;

  port.set_timeout(Duration::from_millis(1000000000))?;
  loop {
    let buf: &mut [u8; 14] = &mut [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0];
    port.read_exact(buf).unwrap();
    let barcode_id = from_utf8(buf).unwrap();
    println!("{}", &barcode_id);
    if barcode_id.starts_with("978") {
      get_book_data(barcode_id.to_string()).await;
    }
  }
}

async fn get_book_data(isbn: String) {
  let lookup_url = format!(
    "https://www.googleapis.com/books/v1/volumes?q=isbn:{}",
    isbn
  );
  let cleint = Client::new();
  let book_data = cleint
    .get(lookup_url)
    .send()
    .await
    .unwrap()
    .json::<BookRoot>()
    .await
    .unwrap();
  println!("{:?}", book_data);
}