feat(matchmaking): initial commit

build/server/Dockerfile

@@ -1,33 +0,0 @@
-################################################################################
-# Create a stage for building the application.
-FROM bryanmylee/godot:4.2.stable as build
-
-ARG SERVER_EXPORT_PRESET_NAME=Server
-
-# Mount the project in the image and build the project.
-RUN --mount=type=bind,source=project,target=project,readonly \
-	<<EOF
-set -e
-/bin/godot --headless --path project --export-release "${SERVER_EXPORT_PRESET_NAME}" ../server
-EOF
-
-################################################################################
-# Create a new stage for running the application that contains the minimal
-# runtime dependencies for the application. This often uses a different base
-# image from the build stage where the necessary files are copied from the build
-# stage.
-FROM debian:bullseye-slim AS final
-
-WORKDIR /app
-
-# Copy the executable from the "build" stage.
-COPY --from=build /build .
-
-# Fix permissions
-RUN chmod +x server
-
-# Expose the port that the application listens on.
-EXPOSE 9000
-
-# Run the application.
-CMD ["./server", "--server", "--headless"]

build/server/README.md

@@ -1,37 +0,0 @@
-# Server Build
-
-## Building the image
-
-Make sure to have Docker installed.
-
-To build the game server image, run the command below from the repository root:
-
-```bash
-docker build --platform linux/x86_64 --tag {custom_tag} -f build/server/Dockerfile .
-```
-
-## Pushing images to Docker Hub
-
-To push the image, run:
-
-```bash
-docker image push {custom_tag}
-```
-
-> To push the image onto the Docker Hub Container Image Library, `{custom_tag}` has to be prefixed by your Docker Hub username e.g. `bryanmylee/server`.
-
-## Pulling images on servers
-
-Run a container with the latest version of the image and it will be pulled automatically.
-
-## Running containers with images
-
-The game server should run on the rang of ports from `19000-19249`, which will be forwarded to `9000-9249` by NGINX. Refer to the [Game Server NGINX configuration](.././../nginx/templates/game_server.nginx).
-
-Certain parts of the application are controlled via environment variables. Pass them into the container with `-e` / `--env`.
-
-```bash
-docker run --detach --name {name} --publish 19000:9000 \
-	--env SERVER_ID=5432 \
-	{custom_tag}
-```

compose.yaml

@@ -39,6 +39,31 @@ services:
     ports:
       - 18000:8000
 
+  matchmaking:
+    platform: linux/amd64
+    image: bryanmylee/multiplayer-base-matchmaking
+    build:
+      context: matchmaking
+      target: final
+    secrets:
+      - postgres-url
+      - game-server-manager-service-key
+      - identity-secret
+      - identity-refresh-secret
+    environment:
+      POSTGRES_URL_FILE: /run/secrets/postgres-url
+      # TODO: use public/private signing for the JWT claims.
+      IDENTITY_SECRET_FILE: /run/secrets/identity-secret
+      IDENTITY_EXPIRES_IN_SECS: 3600
+      REFRESH_SECRET_FILE: /run/secrets/identity-refresh-secret
+      REFRESH_EXPIRES_IN_DAYS: 7
+      GAME_SERVER_MANAGER_SERVICE_KEY_FILE: /run/secrets/game-server-manager-service-key
+    ports:
+      - 18100:8100
+    depends_on:
+      game-server-manager:
+        condition: service_started
+
   game-server-manager:
     platform: linux/amd64
     image: bryanmylee/multiplayer-base-game-server-manager

matchmaking/.env.sample

@@ -0,0 +1,6 @@
+POSTGRES_URL=
+GAME_SERVER_MANAGER_SERVICE_KEY=
+IDENTITY_SECRET=
+IDENTITY_EXPIRES_IN_SECS=
+REFRESH_SECRET=
+REFRESH_EXPIRES_IN_DAYS=

matchmaking/.gitignore

@@ -0,0 +1,2 @@
+target/
+.env

matchmaking/Cargo.lock

@@ -0,0 +1,1632 @@
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matchmaking/Cargo.toml

@@ -0,0 +1,15 @@
+[package]
+name = "matchmaking"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+actix-web = "4.5.1"
+chrono = { version = "0.4.34", default-features = false, features = ["serde", "std"] }
+dotenvy = "0.15.7"
+env_logger = "0.11.1"
+jsonwebtoken = "9.2.0"
+lazy_static = "1.4.0"
+serde = { version = "1.0.196", features = ["derive"] }
+serde_json = "1.0.113"
+uuid = { version = "1.7.0", features = ["v4", "serde", "fast-rng"] }

matchmaking/Dockerfile

@@ -0,0 +1,39 @@
+# syntax=docker/dockerfile:1
+################################################################################
+# Create a stage for building the game server manager.
+ARG RUST_VERSION=1.75.0
+FROM rust:${RUST_VERSION}-slim-bullseye AS build
+ARG APP_NAME=matchmaking
+WORKDIR /app
+
+# Build the application.
+# Leverage a cache mount to /usr/local/cargo/registry/
+# for downloaded dependencies and a cache mount to /app/target/ for 
+# compiled dependencies which will speed up subsequent builds.
+# Leverage a bind mount to the src directory to avoid having to copy the
+# source code into the container. Once built, copy the executable to an
+# output directory before the cache mounted /app/target is unmounted.
+RUN --mount=type=bind,source=src,target=src \
+  --mount=type=bind,source=Cargo.toml,target=Cargo.toml \
+  --mount=type=bind,source=Cargo.lock,target=Cargo.lock \
+  --mount=type=cache,target=/app/target/ \
+  --mount=type=cache,target=/usr/local/cargo/registry/ \
+  <<EOF
+set -e
+cargo build --locked --release
+cp ./target/release/$APP_NAME /bin/server
+EOF
+
+################################################################################
+# Create a new stage for running the application that contains the minimal
+# runtime dependencies for the application.
+FROM debian:bullseye-slim AS final
+
+# Copy the matchking server from the "build" stage.
+COPY --from=build /bin/server /bin/
+
+# Expose the port that the application listens on.
+EXPOSE 8100
+
+# What the container should run when it is started.
+CMD ["/bin/server"]

matchmaking/README.md

@@ -0,0 +1,3 @@
+# Matchmaking
+
+Implements matchmaking.

matchmaking/src/config.rs

@@ -0,0 +1,35 @@
+use std::env;
+
+#[allow(dead_code)]
+fn get_secret_text_or_file(var: &str) -> Option<String> {
+    let secret_text = env::var(var);
+
+    if let Ok(secret_text) = secret_text {
+        Some(secret_text)
+    } else {
+        use std::fs;
+        let Ok(secret_file) = env::var(format!("{var}_FILE")) else {
+            return None;
+        };
+        fs::read_to_string(secret_file).ok()
+    }
+}
+
+fn get_required_secret_text_or_file(var: &str) -> String {
+    let secret_text = env::var(var);
+
+    if let Ok(secret_text) = secret_text {
+        secret_text
+    } else {
+        use std::fs;
+        let secret_file = env::var(format!("{var}_FILE"))
+            .expect(format!("Expected either {var} or {var}_FILE to be set").as_str());
+        fs::read_to_string(secret_file)
+            .expect(format!("The file at {var}_FILE should contain the secret").as_str())
+    }
+}
+
+lazy_static::lazy_static! {
+    pub static ref POSTGRES_URL: String = get_required_secret_text_or_file("POSTGRES_URL");
+    pub static ref GAME_SERVER_MANAGER_SERVICE_KEY: String = get_required_secret_text_or_file("GAME_SERVER_MANAGER_SERVICE_KEY");
+}

matchmaking/src/identity.rs

@@ -0,0 +1,78 @@
+use actix_web::{error, http, web, FromRequest, HttpMessage};
+use chrono::Duration;
+use jsonwebtoken::{DecodingKey, Validation};
+use serde::{Deserialize, Serialize};
+use std::future::{ready, Ready};
+use uuid::Uuid;
+
+#[derive(Clone, Debug)]
+pub struct IdentityConfig {
+    pub secret: String,
+    pub expires_in: Duration,
+    pub refresh_secret: String,
+    pub refresh_expires_in: Duration,
+}
+
+#[derive(Serialize, Deserialize, Clone, Debug)]
+struct IdentityClaims {
+    pub sub: Uuid,
+    pub iat: u64,
+    pub exp: u64,
+}
+
+impl IdentityClaims {
+    pub fn decode(config: &IdentityConfig, token: &str) -> Result<Self, error::Error> {
+        match jsonwebtoken::decode::<Self>(
+            token,
+            &DecodingKey::from_secret(config.secret.as_ref()),
+            &Validation::default(),
+        ) {
+            Ok(payload) => Ok(payload.claims),
+            Err(err) => Err(error::ErrorBadRequest(err)),
+        }
+    }
+}
+
+/// A user's verified identity provided by their server access token.
+#[derive(Debug, Clone)]
+pub struct Identity {
+    pub user_id: Uuid,
+}
+
+impl Identity {
+    pub fn from_user_id(user_id: &Uuid) -> Self {
+        Identity {
+            user_id: user_id.clone(),
+        }
+    }
+}
+
+impl FromRequest for Identity {
+    type Error = error::Error;
+    type Future = Ready<Result<Self, Self::Error>>;
+
+    fn from_request(req: &actix_web::HttpRequest, _: &mut actix_web::dev::Payload) -> Self::Future {
+        let Some(token) = req
+            .headers()
+            .get(http::header::AUTHORIZATION)
+            .and_then(|h| h.to_str().ok())
+            .map(|h| h.split_at(7).1.to_string())
+        else {
+            return ready(Err(error::ErrorUnauthorized("Missing Bearer token")));
+        };
+
+        let config = req
+            .app_data::<web::Data<IdentityConfig>>()
+            .expect("IdentityConfig is available in app data");
+
+        let claims = match IdentityClaims::decode(config, &token) {
+            Ok(claims) => claims,
+            Err(err) => return ready(Err(error::ErrorBadRequest(err))),
+        };
+
+        let identity = Identity::from_user_id(&claims.sub);
+        req.extensions_mut().insert::<Identity>(identity.clone());
+
+        ready(Ok(identity))
+    }
+}

matchmaking/src/lib.rs

@@ -0,0 +1,4 @@
+pub mod config;
+pub mod identity;
+pub mod player;
+pub mod queue;

matchmaking/src/main.rs

@@ -0,0 +1,33 @@
+use actix_web::{get, middleware, web, App, HttpServer, Responder};
+use matchmaking::{player, queue};
+
+#[get("/")]
+async fn hello() -> impl Responder {
+    "MultiplayerBase Matchmaking"
+}
+
+const HOST: &'static str = "0.0.0.0";
+const PORT: u16 = 8100;
+
+#[actix_web::main]
+async fn main() -> std::io::Result<()> {
+    dotenvy::dotenv().ok();
+    std::env::set_var("RUST_LOG", "actix_web=debug,actix_server=info");
+    env_logger::init();
+
+    let queued_players_data = web::Data::new(player::PlayersData::new());
+
+    HttpServer::new(move || {
+        App::new()
+            .wrap(middleware::NormalizePath::new(
+                middleware::TrailingSlash::Always,
+            ))
+            .wrap(middleware::Logger::default())
+            .app_data(queued_players_data.clone())
+            .service(hello)
+            .service(web::scope("/queue").configure(queue::config_service))
+    })
+    .bind((HOST, PORT))?
+    .run()
+    .await
+}

matchmaking/src/player.rs

@@ -0,0 +1,20 @@
+use std::sync::RwLock;
+use uuid::Uuid;
+
+#[derive(Debug)]
+pub struct PlayersData {
+    pub queued: RwLock<Vec<Player>>,
+}
+
+impl PlayersData {
+    pub fn new() -> PlayersData {
+        PlayersData {
+            queued: RwLock::new(vec![]),
+        }
+    }
+}
+
+#[derive(Debug)]
+pub struct Player {
+    pub user_id: Uuid,
+}

matchmaking/src/queue/join.rs

@@ -0,0 +1,22 @@
+use crate::player::PlayersData;
+use crate::{identity::Identity, player::Player};
+use actix_web::{post, web, HttpResponse};
+
+#[post("/join/")]
+async fn join(
+    identity: Identity,
+    players_data: web::Data<PlayersData>,
+) -> actix_web::Result<HttpResponse> {
+    let mut queued = players_data
+        .queued
+        .write()
+        .expect("Failed to get write lock on player queue");
+
+    let player = Player {
+        user_id: identity.user_id,
+    };
+
+    queued.push(player);
+
+    Ok(HttpResponse::Ok().finish())
+}

matchmaking/src/queue/mod.rs

@@ -0,0 +1,7 @@
+mod join;
+
+use actix_web::web;
+
+pub fn config_service(cfg: &mut web::ServiceConfig) {
+    cfg.service(join::join);
+}