10 files changed, 521 insertions, 0 deletions
diff --git a/planetwars-server/src/db/bots.rs b/planetwars-server/src/db/bots.rs
new file mode 100644
index 0000000..bc9cb11
--- /dev/null
+++ b/planetwars-server/src/db/bots.rs
@@ -0,0 +1,53 @@
+use diesel::prelude::*;
+use serde::{Deserialize, Serialize};
+
+use crate::schema::{bots, code_bundles};
+use chrono;
+
+#[derive(Insertable)]
+#[table_name = "bots"]
+pub struct NewBot<'a> {
+    pub owner_id: i32,
+    pub name: &'a str,
+}
+
+#[derive(Queryable, Debug, PartialEq, Serialize, Deserialize)]
+pub struct Bot {
+    pub id: i32,
+    pub owner_id: i32,
+    pub name: String,
+}
+
+pub fn create_bot(new_bot: &NewBot, conn: &PgConnection) -> QueryResult<Bot> {
+    diesel::insert_into(bots::table)
+        .values(new_bot)
+        .get_result(conn)
+}
+
+pub fn find_bot(id: i32, conn: &PgConnection) -> QueryResult<Bot> {
+    bots::table.find(id).first(conn)
+}
+
+#[derive(Insertable)]
+#[table_name = "code_bundles"]
+pub struct NewCodeBundle<'a> {
+    pub bot_id: i32,
+    pub path: &'a str,
+}
+
+#[derive(Queryable, Serialize, Deserialize, Debug)]
+pub struct CodeBundle {
+    pub id: i32,
+    pub bot_id: i32,
+    pub path: String,
+    pub created_at: chrono::NaiveDateTime,
+}
+
+pub fn create_code_bundle(
+    new_code_bundle: &NewCodeBundle,
+    conn: &PgConnection,
+) -> QueryResult<CodeBundle> {
+    diesel::insert_into(code_bundles::table)
+        .values(new_code_bundle)
+        .get_result(conn)
+}
diff --git a/planetwars-server/src/db/mod.rs b/planetwars-server/src/db/mod.rs
new file mode 100644
index 0000000..947b789
--- /dev/null
+++ b/planetwars-server/src/db/mod.rs
@@ -0,0 +1,3 @@
+pub mod bots;
+pub mod sessions;
+pub mod users;
diff --git a/planetwars-server/src/db/sessions.rs b/planetwars-server/src/db/sessions.rs
new file mode 100644
index 0000000..96f3926
--- /dev/null
+++ b/planetwars-server/src/db/sessions.rs
@@ -0,0 +1,46 @@
+use super::users::User;
+use crate::schema::{sessions, users};
+use base64;
+use diesel::PgConnection;
+use diesel::{insert_into, prelude::*, Insertable, RunQueryDsl};
+use rand::{self, Rng};
+
+#[derive(Insertable)]
+#[table_name = "sessions"]
+struct NewSession {
+    token: String,
+    user_id: i32,
+}
+
+#[derive(Queryable, Debug, PartialEq)]
+pub struct Session {
+    pub id: i32,
+    pub user_id: i32,
+    pub token: String,
+}
+
+pub fn create_session(user: &User, conn: &PgConnection) -> Session {
+    let new_session = NewSession {
+        token: gen_session_token(),
+        user_id: user.id,
+    };
+    let session = insert_into(sessions::table)
+        .values(&new_session)
+        .get_result::<Session>(conn)
+        .unwrap();
+
+    return session;
+}
+
+pub fn find_user_by_session(token: &str, conn: &PgConnection) -> QueryResult<(Session, User)> {
+    sessions::table
+        .inner_join(users::table)
+        .filter(sessions::token.eq(&token))
+        .first::<(Session, User)>(conn)
+}
+
+pub fn gen_session_token() -> String {
+    let mut rng = rand::thread_rng();
+    let token: [u8; 32] = rng.gen();
+    return base64::encode(&token);
+}
diff --git a/planetwars-server/src/db/users.rs b/planetwars-server/src/db/users.rs
new file mode 100644
index 0000000..663f173
--- /dev/null
+++ b/planetwars-server/src/db/users.rs
@@ -0,0 +1,108 @@
+use crate::schema::users;
+use argon2;
+use diesel::{prelude::*, PgConnection};
+use rand::Rng;
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, Deserialize)]
+pub struct Credentials<'a> {
+    pub username: &'a str,
+    pub password: &'a str,
+}
+
+#[derive(Insertable)]
+#[table_name = "users"]
+pub struct NewUser<'a> {
+    pub username: &'a str,
+    pub password_hash: &'a [u8],
+    pub password_salt: &'a [u8],
+}
+
+#[derive(Queryable, Debug)]
+pub struct User {
+    pub id: i32,
+    pub username: String,
+    pub password_salt: Vec<u8>,
+    pub password_hash: Vec<u8>,
+}
+
+// TODO: make this configurable somewhere
+fn argon2_config() -> argon2::Config<'static> {
+    argon2::Config {
+        variant: argon2::Variant::Argon2i,
+        version: argon2::Version::Version13,
+        mem_cost: 4096,
+        time_cost: 3,
+        lanes: 1,
+        thread_mode: argon2::ThreadMode::Sequential,
+        // TODO: set a secret
+        secret: &[],
+        ad: &[],
+        hash_length: 32,
+    }
+}
+
+pub fn create_user(credentials: &Credentials, conn: &PgConnection) -> QueryResult<User> {
+    let argon_config = argon2_config();
+
+    let salt: [u8; 32] = rand::thread_rng().gen();
+    let hash = argon2::hash_raw(credentials.password.as_bytes(), &salt, &argon_config).unwrap();
+    let new_user = NewUser {
+        username: &credentials.username,
+        password_salt: &salt,
+        password_hash: &hash,
+    };
+    diesel::insert_into(users::table)
+        .values(&new_user)
+        .get_result::<User>(conn)
+}
+
+pub fn authenticate_user(credentials: &Credentials, db_conn: &PgConnection) -> Option<User> {
+    users::table
+        .filter(users::username.eq(&credentials.username))
+        .first::<User>(db_conn)
+        .optional()
+        .unwrap()
+        .and_then(|user| {
+            let password_matches = argon2::verify_raw(
+                credentials.password.as_bytes(),
+                &user.password_salt,
+                &user.password_hash,
+                &argon2_config(),
+            )
+            .unwrap();
+
+            if password_matches {
+                return Some(user);
+            } else {
+                return None;
+            }
+        })
+}
+
+#[test]
+fn test_argon() {
+    let credentials = Credentials {
+        username: "piepkonijn",
+        password: "geheim123",
+    };
+    let argon_config = argon2_config();
+
+    let salt: [u8; 32] = rand::thread_rng().gen();
+    let hash = argon2::hash_raw(credentials.password.as_bytes(), &salt, &argon_config).unwrap();
+    let new_user = NewUser {
+        username: &credentials.username,
+        password_hash: &hash,
+        password_salt: &salt,
+    };
+
+    let password_matches = argon2::verify_raw(
+        credentials.password.as_bytes(),
+        &new_user.password_salt,
+        &new_user.password_hash,
+        &argon2_config(),
+    )
+    .unwrap();
+
+    assert!(password_matches);
+}
diff --git a/planetwars-server/src/lib.rs b/planetwars-server/src/lib.rs
new file mode 100644
index 0000000..665523f
--- /dev/null
+++ b/planetwars-server/src/lib.rs
@@ -0,0 +1,85 @@
+#![feature(proc_macro_hygiene, decl_macro)]
+
+#[macro_use]
+extern crate diesel;
+
+pub mod db;
+pub mod routes;
+pub mod schema;
+
+use std::ops::Deref;
+
+use axum;
+use bb8::PooledConnection;
+use bb8_diesel::{self, DieselConnectionManager};
+use diesel::PgConnection;
+
+use axum::{
+    async_trait,
+    extract::{Extension, FromRequest, RequestParts},
+    http::StatusCode,
+    routing::{get, post},
+    AddExtensionLayer, Router,
+};
+
+async fn index_handler() -> &'static str {
+    "Hello, world!"
+}
+
+type ConnectionPool = bb8::Pool<DieselConnectionManager<PgConnection>>;
+
+pub async fn app() -> Router {
+    let database_url = "postgresql://planetwars:planetwars@localhost/planetwars";
+    let manager = DieselConnectionManager::<PgConnection>::new(database_url);
+    let pool = bb8::Pool::builder().build(manager).await.unwrap();
+
+    let app = Router::new()
+        .route("/", get(index_handler))
+        .route("/users/register", post(routes::users::register))
+        .route("/users/login", post(routes::users::login))
+        .route("/users/me", get(routes::users::current_user))
+        .route("/bots", post(routes::bots::create_bot))
+        .route("/bots/:bot_id", get(routes::bots::get_bot))
+        .route("/bots/:bot_id/upload", post(routes::bots::upload_bot_code))
+        .layer(AddExtensionLayer::new(pool));
+    app
+}
+
+// we can also write a custom extractor that grabs a connection from the pool
+// which setup is appropriate depends on your application
+pub struct DatabaseConnection(PooledConnection<'static, DieselConnectionManager<PgConnection>>);
+
+impl Deref for DatabaseConnection {
+    type Target = PooledConnection<'static, DieselConnectionManager<PgConnection>>;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
+#[async_trait]
+impl<B> FromRequest<B> for DatabaseConnection
+where
+    B: Send,
+{
+    type Rejection = (StatusCode, String);
+
+    async fn from_request(req: &mut RequestParts<B>) -> Result<Self, Self::Rejection> {
+        let Extension(pool) = Extension::<ConnectionPool>::from_request(req)
+            .await
+            .map_err(internal_error)?;
+
+        let conn = pool.get_owned().await.map_err(internal_error)?;
+
+        Ok(Self(conn))
+    }
+}
+
+/// Utility function for mapping any error into a `500 Internal Server Error`
+/// response.
+fn internal_error<E>(err: E) -> (StatusCode, String)
+where
+    E: std::error::Error,
+{
+    (StatusCode::INTERNAL_SERVER_ERROR, err.to_string())
+}
diff --git a/planetwars-server/src/main.rs b/planetwars-server/src/main.rs
new file mode 100644
index 0000000..9bd283e
--- /dev/null
+++ b/planetwars-server/src/main.rs
@@ -0,0 +1,16 @@
+use std::net::SocketAddr;
+
+extern crate planetwars_server;
+extern crate tokio;
+
+#[tokio::main]
+async fn main() {
+    let app = planetwars_server::app().await;
+
+    let addr = SocketAddr::from(([127, 0, 0, 1], 9000));
+
+    axum::Server::bind(&addr)
+        .serve(app.into_make_service())
+        .await
+        .unwrap();
+}
diff --git a/planetwars-server/src/routes/bots.rs b/planetwars-server/src/routes/bots.rs
new file mode 100644
index 0000000..da09669
--- /dev/null
+++ b/planetwars-server/src/routes/bots.rs
@@ -0,0 +1,75 @@
+use axum::extract::{Path, RawBody};
+use axum::http::StatusCode;
+use axum::Json;
+use rand::Rng;
+use serde::{Deserialize, Serialize};
+use std::io::Cursor;
+use std::path;
+
+use crate::db::bots::{self, CodeBundle};
+use crate::db::users::User;
+use crate::DatabaseConnection;
+use bots::Bot;
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct BotParams {
+    name: String,
+}
+
+pub async fn create_bot(
+    conn: DatabaseConnection,
+    user: User,
+    params: Json<BotParams>,
+) -> (StatusCode, Json<Bot>) {
+    let bot_params = bots::NewBot {
+        owner_id: user.id,
+        name: &params.name,
+    };
+    let bot = bots::create_bot(&bot_params, &conn).unwrap();
+    (StatusCode::CREATED, Json(bot))
+}
+
+// TODO: handle errors
+pub async fn get_bot(conn: DatabaseConnection, Path(bot_id): Path<i32>) -> Json<Bot> {
+    let bot = bots::find_bot(bot_id, &conn).unwrap();
+    Json(bot)
+}
+
+// TODO: proper error handling
+pub async fn upload_bot_code(
+    conn: DatabaseConnection,
+    user: User,
+    Path(bot_id): Path<i32>,
+    RawBody(body): RawBody,
+) -> (StatusCode, Json<CodeBundle>) {
+    // TODO: put in config somewhere
+    let data_path = "./data/bots";
+
+    let bot = bots::find_bot(bot_id, &conn).expect("Bot not found");
+
+    assert_eq!(user.id, bot.owner_id);
+
+    // generate a random filename
+    let token: [u8; 16] = rand::thread_rng().gen();
+    let name = base64::encode(&token);
+
+    let path = path::Path::new(data_path).join(name);
+    // let capped_buf = data.open(10usize.megabytes()).into_bytes().await.unwrap();
+    // assert!(capped_buf.is_complete());
+    // let buf = capped_buf.into_inner();
+    let buf = hyper::body::to_bytes(body).await.unwrap();
+
+    zip::ZipArchive::new(Cursor::new(buf))
+        .unwrap()
+        .extract(&path)
+        .unwrap();
+
+    let bundle = bots::NewCodeBundle {
+        bot_id: bot.id,
+        path: path.to_str().unwrap(),
+    };
+    let code_bundle =
+        bots::create_code_bundle(&bundle, &conn).expect("Failed to create code bundle");
+
+    (StatusCode::CREATED, Json(code_bundle))
+}
diff --git a/planetwars-server/src/routes/mod.rs b/planetwars-server/src/routes/mod.rs
new file mode 100644
index 0000000..718d7ef
--- /dev/null
+++ b/planetwars-server/src/routes/mod.rs
@@ -0,0 +1,2 @@
+pub mod bots;
+pub mod users;
diff --git a/planetwars-server/src/routes/users.rs b/planetwars-server/src/routes/users.rs
new file mode 100644
index 0000000..fc77d7b
--- /dev/null
+++ b/planetwars-server/src/routes/users.rs
@@ -0,0 +1,94 @@
+use crate::db::users::{Credentials, User};
+use crate::db::{sessions, users};
+use crate::DatabaseConnection;
+use axum::extract::{FromRequest, RequestParts, TypedHeader};
+use axum::headers::authorization::Bearer;
+use axum::headers::Authorization;
+use axum::http::StatusCode;
+use axum::{async_trait, Json};
+use serde::{Deserialize, Serialize};
+
+type AuthorizationHeader = TypedHeader<Authorization<Bearer>>;
+
+#[async_trait]
+impl<B> FromRequest<B> for User
+where
+    B: Send,
+{
+    type Rejection = (StatusCode, String);
+
+    async fn from_request(req: &mut RequestParts<B>) -> Result<Self, Self::Rejection> {
+        let conn = DatabaseConnection::from_request(req).await?;
+        let TypedHeader(Authorization(bearer)) = AuthorizationHeader::from_request(req)
+            .await
+            .map_err(|_| (StatusCode::UNAUTHORIZED, "".to_string()))?;
+
+        let (_session, user) = sessions::find_user_by_session(bearer.token(), &conn)
+            .map_err(|_| (StatusCode::UNAUTHORIZED, "".to_string()))?;
+
+        Ok(user)
+    }
+}
+
+#[derive(Serialize, Deserialize)]
+pub struct UserData {
+    pub user_id: i32,
+    pub username: String,
+}
+
+impl From<User> for UserData {
+    fn from(user: User) -> Self {
+        UserData {
+            user_id: user.id,
+            username: user.username,
+        }
+    }
+}
+
+#[derive(Deserialize)]
+pub struct RegistrationParams {
+    pub username: String,
+    pub password: String,
+}
+
+pub async fn register(
+    conn: DatabaseConnection,
+    params: Json<RegistrationParams>,
+) -> Json<UserData> {
+    let credentials = Credentials {
+        username: &params.username,
+        password: &params.password,
+    };
+    let user = users::create_user(&credentials, &conn).unwrap();
+    Json(user.into())
+}
+
+#[derive(Deserialize)]
+pub struct LoginParams {
+    pub username: String,
+    pub password: String,
+}
+
+pub async fn login(
+    conn: DatabaseConnection,
+    params: Json<LoginParams>,
+) -> Result<String, StatusCode> {
+    let credentials = Credentials {
+        username: &params.username,
+        password: &params.password,
+    };
+    // TODO: handle failures
+    let authenticated = users::authenticate_user(&credentials, &conn);
+
+    match authenticated {
+        None => Err(StatusCode::FORBIDDEN),
+        Some(user) => {
+            let session = sessions::create_session(&user, &conn);
+            Ok(session.token)
+        }
+    }
+}
+
+pub async fn current_user(user: User) -> Json<UserData> {
+    Json(user.into())
+}
diff --git a/planetwars-server/src/schema.rs b/planetwars-server/src/schema.rs
new file mode 100644
index 0000000..bf58434
--- /dev/null
+++ b/planetwars-server/src/schema.rs
@@ -0,0 +1,39 @@
+table! {
+    bots (id) {
+        id -> Int4,
+        owner_id -> Int4,
+        name -> Text,
+    }
+}
+
+table! {
+    code_bundles (id) {
+        id -> Int4,
+        bot_id -> Int4,
+        path -> Text,
+        created_at -> Timestamp,
+    }
+}
+
+table! {
+    sessions (id) {
+        id -> Int4,
+        user_id -> Int4,
+        token -> Varchar,
+    }
+}
+
+table! {
+    users (id) {
+        id -> Int4,
+        username -> Varchar,
+        password_salt -> Bytea,
+        password_hash -> Bytea,
+    }
+}
+
+joinable!(bots -> users (owner_id));
+joinable!(code_bundles -> bots (bot_id));
+joinable!(sessions -> users (user_id));
+
+allow_tables_to_appear_in_same_query!(bots, code_bundles, sessions, users,);