runtime: runtime::Handle,

) -> anyhow::Result<(Executor, Arc<OwnedResources>, World)> {

let mut executor = systems::build_executor();

let mut event_handlers = event_handlers::build_event_handlers();

let mut world = World::new();

let mut resources = OwnedResources::new();

executor.set_up(&mut resources, &mut world);

event_handlers.set_up(&mut resources, &mut world);

println!("Loading configuration");

let config = load_config()

.await

.context("Failed to load configuration file `feather.toml`")?;

set_up_logging(&config).context("Failed to initialize logging")?;

log::info!("Loading world save");

let level = load_level(&config)

.await

.context("Failed to load level file (is your world directory corrupted?)")?;

let cworker_handle = create_cworker_handle(&config, &level);

let mut game = Game {

chunk_map: Default::default(),

tick_count: 0,

chunk_holders: Default::default(),

config: Arc::clone(&config),

level,

chunk_entities: Default::default(),

time: Default::default(),

running_tasks: RunningTasks::new(runtime),

event_handlers: Arc::new(event_handlers),

resources: Arc::new(Default::default()), // we override this momentarily

rng: Default::default(),

bump: Default::default(),

player_count: Arc::new(Default::default()),

};

let packet_buffers = Arc::new(PacketBuffers::new());

log::info!("Queueing spawn chunks for loading");

load_spawn_chunks(&mut game, &mut world, &cworker_handle);

log::info!("Creating RSA keypair");

feather_server_network::init();

log::info!("Initializing block ID mappings");

feather_core::blocks::init();

log::info!("Starting networking task");

let networking_handle =

create_networking_handle(Arc::clone(&config), &game, Arc::clone(&packet_buffers))

.await

.context("Failed to start the networking task")?;

let resources = create_resources(

resources,

game,

cworker_handle,

networking_handle,

packet_buffers,

);

Ok((executor, resources, world))

const PATH: &str = "feather.toml";

match File::open(PATH).await {

Ok(mut file) => Config::load_from_file(&mut file).await,

Err(e) if e.kind() == io::ErrorKind::NotFound => {

println!("Missing configuration file; creating a default one for you.");

let mut file = File::create(PATH).await?;

file.write_all(DEFAULT_CONFIG_STR.as_bytes()).await?;

let config = Config::default();

Ok(config)

}

Err(e) => Err(e.into()),

}

.map(Arc::new)

use log::Level::*;

let level = match config.log.level.as_str() {

"error" => Error,

"warn" => Warn,

"info" => Info,

"debug" => Debug,

"trace" => Trace,

x => anyhow::bail!(

"invalid logging level {} (please check your config file)",

x

),

};

simple_logger::init_with_level(level).map_err(Into::into)

const LEVEL_FILE_NAME: &str = "level.dat";

let world_dir = Path::new(&config.world.name);

// Create world directory (silently fail if it already exists)

let _ = tokio::fs::create_dir(world_dir).await;

let mut level_path = PathBuf::new();

level_path.push(world_dir);

level_path.push(LEVEL_FILE_NAME);

match File::open(&level_path).await {

Ok(mut file) => LevelData::load_from_file(&mut file).await,

Err(e) if e.kind() == io::ErrorKind::NotFound => {

log::info!("World save not found; creating it");

let level = generate_level(config);

let mut file = File::create(&level_path).await?;

level.save_to_file(&mut file).await?;

Ok(level)

}

Err(e) => Err(e.into()),

}

let seed = seed_for_config(config);

let world_name = &config.world.name;

log::info!("Using seed {} for world '{}'", seed, world_name);

// TODO: Generate spawn position properly

LevelData {

allow_commands: false,

border_center_x: 0.0,

border_center_z: 0.0,

border_damage_per_block: 0.0,

border_safe_zone: 0.0,

border_size: 0.0,

clear_weather_time: 0,

data_version: 0,

day_time: 0,

difficulty: 0,

difficulty_locked: 0,

game_type: 0,

hardcore: false,

initialized: false,

last_played: 0,

raining: false,

rain_time: 0,

seed,

spawn_x: 0,

spawn_y: 100,

spawn_z: 0,

thundering: false,

thunder_time: 0,

time: 0,

version: Default::default(),

generator_name: config.world.generator.to_string(),

generator_options: None,

}

let seed_raw = &config.world.seed;

// Empty seed: random

// Seed is valid i64: parse

// Seed is something else: hash

if seed_raw.is_empty() {

rand::thread_rng().gen()

} else {

match seed_raw.parse::<i64>() {

Ok(seed_int) => seed_int,

Err(_) => hash_seed(seed_raw.as_str()),

}

}

// use FxHash instead of DefaultHasher because

// it's deterministic

let mut hasher = FxHasher::default();

seed_raw.hash(&mut hasher);

hasher.finish() as i64

let generator: Arc<dyn WorldGenerator> = match level.generator_type() {

LevelGeneratorType::Flat => Arc::new(SuperflatWorldGenerator {

options: level.clone().generator_options.unwrap_or_default(),

}),

LevelGeneratorType::Default => {

Arc::new(ComposableGenerator::default_with_seed(level.seed as u64))

}

_ => Arc::new(EmptyWorldGenerator {}),

};

let (tx, rx) = chunk_worker::start(Path::new(&config.world.name), generator);

ChunkWorkerHandle {

sender: tx,

receiver: rx,

}

config: Arc<Config>,

game: &Game,

packet_buffers: Arc<PacketBuffers>,

) -> anyhow::Result<NetworkIoManager> {

let server_icon = load_server_icon()

.await

.context("failed to load server icon `server-icon.png` (is it corrupted?)")?;

let addr = format!("{}:{}", config.server.address, config.server.port);

let socket = TcpListener::bind(&addr)

.await

.context("failed to bind to port (is another server instance already running?)")?;

log::info!("Listening on {}", addr);

Ok(NetworkIoManager::start(

socket,

config,

Arc::clone(&game.player_count),

Arc::new(server_icon),

packet_buffers,

))

match File::open("server-icon.png").await {

Ok(mut file) => {

let mut buf = vec![];

file.read_to_end(&mut buf).await?;

let encoded = base64::encode(&buf);

Ok(Some(format!("data:image/png;base64,{}", encoded)))

}

Err(e) if e.kind() == io::ErrorKind::NotFound => Ok(None),

Err(e) => Err(e.into()),

}

let view_distance = i32::from(game.config.server.view_distance);

// Create an entity for the server and

// add chunk holders using it.

let server_entity = EntityBuilder::new().build().spawn_in(world);

let offset_x = game.level.spawn_x / 16;

let offset_z = game.level.spawn_z / 16;

for x in -view_distance..=view_distance {

for z in -view_distance..=view_distance {

let chunk = ChunkPosition::new(x + offset_x, z + offset_z);

feather_server_chunk::load_chunk(cworker_handle, chunk);

game.chunk_holders.insert_holder(chunk, server_entity);

}

}

resources: OwnedResources,

game: Game,

cworker_handle: ChunkWorkerHandle,

networking_handle: NetworkIoManager,

packet_buffers: Arc<PacketBuffers>,

) -> Arc<OwnedResources> {

let resources = {

let resources = resources

.with(game)

.with(cworker_handle)

.with(networking_handle)

.with(packet_buffers);

Arc::new(resources)

};

resources.get_mut::<Game>().resources = Arc::clone(&resources);

resources