rust/src/lib.rs


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#[macro_use]
extern crate fatcat_api;
extern crate chrono;
#[macro_use]
extern crate diesel;
extern crate uuid;
extern crate dotenv;
extern crate futures;
#[macro_use]
extern crate hyper;
//extern crate swagger;
#[macro_use]
extern crate error_chain;
extern crate iron;
extern crate r2d2;
extern crate serde_json;

pub mod api_server;
pub mod database_schema;
pub mod database_models;

mod errors {
    error_chain!{}
}

pub use self::errors::*;
use diesel::pg::PgConnection;
use diesel::prelude::*;
use diesel::r2d2::ConnectionManager;
use dotenv::dotenv;
use iron::middleware::AfterMiddleware;
use iron::{Request, Response};
use std::env;

pub type ConnectionPool = r2d2::Pool<ConnectionManager<diesel::pg::PgConnection>>;

/// Establish a direct database connection. Not currently used, but could be helpful for
/// single-threaded tests or utilities.
pub fn establish_connection() -> PgConnection {
    dotenv().ok();

    let database_url = env::var("DATABASE_URL").expect("DATABASE_URL must be set");
    PgConnection::establish(&database_url).expect(&format!("Error connecting to {}", database_url))
}

/// Instantiate a new API server with a pooled database connection
pub fn server() -> Result<api_server::Server> {
    dotenv().ok();
    let database_url = env::var("DATABASE_URL").expect("DATABASE_URL must be set");
    let manager = ConnectionManager::<PgConnection>::new(database_url);
    let pool = r2d2::Pool::builder()
        .build(manager)
        .expect("Failed to create database pool.");
    Ok(api_server::Server { db_pool: pool })
}

/// HTTP header middleware
header! { (XClacksOverhead, "X-Clacks-Overhead") => [String] }

pub struct XClacksOverheadMiddleware;

impl AfterMiddleware for XClacksOverheadMiddleware {
    fn after(&self, _req: &mut Request, mut res: Response) -> iron::IronResult<Response> {
        res.headers
            .set(XClacksOverhead("GNU aaronsw, jpb".to_owned()));
        Ok(res)
    }
}