api-server/src/main.rs

mod dem;


use std::env;
use axum_macros::debug_handler;
use axum::{
    extract::{Path, State}, routing::{get}, Router
};
use dem::{DSC, new_cache};

use tracing::info;



#[tokio::main(flavor = "current_thread")]
async fn main() {
    // initialize tracing
    tracing_subscriber::fmt::init();


    let cache = new_cache(1000);

    // build our application with a route
    let app = Router::new()
        .route("/elevation/:lat/:lon", get(get_elevation))
        .with_state(cache);


    let port = env::var("HTTP_PORT").unwrap_or("3000".to_string());
    let host = format!("[::]:{port}");
    info!("Will start server on {host}");


    let listener = tokio::net::TcpListener::bind(host).await.unwrap();
    axum::serve(listener, app).await.unwrap();
}


#[debug_handler]
async fn get_elevation(State(shared): State<DSC>, Path((lat, lon)): Path<(f64, f64)>) -> String{

    let ele = dem::elevation_from_coordinates(shared, lat, lon);
    let myele = ele.await;
    format!("{myele}")
}