integra 0.0.9

Integra is a sleek, elegant, performant web framework for Rust, harnessing the power of the hyper library.
Documentation 
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use hyper::{Body, Request, Response, Method};
use hyper::service::Service;
use std::collections::HashMap;
use std::sync::{Arc};
use std::convert::Infallible;
use std::future::Future;
use std::pin::Pin;
use std::task::Context;
use tokio::macros::support::Poll;
use std::sync::Mutex;

pub struct ServiceWithRouter {
    pub router: Arc<Router>,
}

impl Service<Request<Body>> for ServiceWithRouter {
    type Response = Response<Body>;
    type Error = Infallible;
    type Future = Pin<Box<dyn Future<Output = Result<Self::Response, Self::Error>> + Send>>;

    fn poll_ready(&mut self, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
        Poll::Ready(Ok(()))
    }

    fn call(&mut self, req: Request<Body>) -> Self::Future {
        let router = Arc::clone(&self.router);
        Box::pin(async move {
            if let Some(handler) = router.get_handler(&req) {
                Ok(handler.call(req).await)
            } else {
                Ok(Response::new(Body::from("Not Found")))
            }
        })
    }
}

pub trait Handler: Send + Sync {
    fn call(&self, req: Request<Body>) -> Pin<Box<dyn Future<Output = Response<Body>> + Send>>;
}

impl<F, Fut> Handler for F
where
    F: Fn(Request<Body>) -> Fut + Send + Sync,
    Fut: Future<Output = Response<Body>> + Send + 'static,
{
    fn call(&self, req: Request<Body>) -> Pin<Box<dyn Future<Output = Response<Body>> + Send>> {
        Box::pin(self(req))
    }
}

pub struct Route {
    method: Method,
    path: String,
    handler: Arc<dyn Handler>,
}

impl Route {
    pub fn get<H: Handler + 'static>(path: &str, handler: H) -> Self {
        let handler = Arc::new(handler);
        Route {
            method: Method::GET,
            path: path.to_string(),
            handler,
        }
    }
}

impl Clone for Route {
    fn clone(&self) -> Self {
        Route {
            method: self.method.clone(),
            path: self.path.clone(),
            handler: self.handler.clone(),
        }
    }
}

impl Clone for Router {
    fn clone(&self) -> Self {
        let routes = self.routes.lock().unwrap();
        let param_routes = self.param_routes.lock().unwrap();
        Router {
            routes: Mutex::new(routes.clone()),
            param_routes: Mutex::new(param_routes.clone())
        }
    }
}


pub struct Router {
    routes: Mutex<HashMap<(Method, String), Arc<dyn Handler>>>,
    param_routes: Mutex<HashMap<(Method, String), Arc<dyn Handler>>>,
}

impl Router {
    pub fn new() -> Self {
        Router {
            routes: Mutex::new(HashMap::new()),
            param_routes: Mutex::new(HashMap::new()),
        }
    }    

    pub fn register(&mut self, route: Route) {
        if route.path.contains("{") && route.path.contains("}") {
            // Use lock() instead of write()
            let mut param_routes = self.param_routes.lock().unwrap();
            param_routes.insert((route.method, route.path), route.handler);
        } else {
            // Use lock() instead of write()
            let mut routes = self.routes.lock().unwrap();
            routes.insert((route.method, route.path), route.handler);
        }
    }

    pub fn get_handler(&self, req: &Request<Body>) -> Option<Arc<dyn Handler>> {
        let path = req.uri().path().to_string();
        let method = req.method().clone();

        // Try to fetch from regular routes first
        {
            let routes = self.routes.lock().unwrap();
            if let Some(handler) = routes.get(&(method.clone(), path.clone())) {
                return Some(handler.clone());
            }
        }

        // If not found, try to fetch from parameterized routes
        {
            let param_routes = self.param_routes.lock().unwrap();
            for ((route_method, route_path), handler) in param_routes.iter() {
                if method == *route_method && route_path_matches(&path, route_path) {
                    return Some(handler.clone());
                }
            }
        }
        
        None
    }
}

fn route_path_matches(request_path: &str, route_path: &str) -> bool {
    let request_segments: Vec<&str> = request_path.split('/').collect();
    let route_segments: Vec<&str> = route_path.split('/').collect();

    if request_segments.len() != route_segments.len() {
        return false;
    }

    for (req_seg, route_seg) in request_segments.iter().zip(route_segments.iter()) {
        if !route_seg.starts_with("{") && req_seg != route_seg {
            return false;
        }
    }
    true
}

// The routes! macro
#[macro_export]
macro_rules! routes {
    ($($route_slice:expr),*) => {{
        let mut router = Router::new();
        $(
            for route in $route_slice {
                router.register(route.clone());
            }
        )*
        router
    }};
}

#[macro_export]
macro_rules! route_collector {
    ($($module_name:ident),*) => {
        routes!(
            $(&$module_name::routes()[..]),*
        )
    };
}