Implement the player list

This commit is contained in:
Ryan 2022-06-27 17:52:23 -07:00
parent d7d922399a
commit 055dd03ffc
11 changed files with 509 additions and 63 deletions

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@ -39,6 +39,7 @@ sha1 = "0.10"
sha2 = "0.10" sha2 = "0.10"
thiserror = "1" thiserror = "1"
tokio = { version = "1", features = ["full"] } tokio = { version = "1", features = ["full"] }
url = {version = "2.2.2", features = ["serde"] }
uuid = "1" uuid = "1"
vek = "0.15" vek = "0.15"

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@ -54,7 +54,7 @@ impl Config for Game {
fn online_mode(&self) -> bool { fn online_mode(&self) -> bool {
// You'll want this to be true on real servers. // You'll want this to be true on real servers.
false true
} }
async fn server_list_ping(&self, _server: &Server, _remote_addr: SocketAddr) -> ServerListPing { async fn server_list_ping(&self, _server: &Server, _remote_addr: SocketAddr) -> ServerListPing {
@ -104,6 +104,16 @@ impl Config for Game {
client.set_game_mode(GameMode::Creative); client.set_game_mode(GameMode::Creative);
client.set_max_view_distance(32); client.set_max_view_distance(32);
client.teleport([0.0, 200.0, 0.0], 0.0, 0.0); client.teleport([0.0, 200.0, 0.0], 0.0, 0.0);
world.meta.player_list_mut().add_player(
client.uuid(),
client.username().to_string(),
None,
None,
GameMode::Creative,
0,
None,
);
} }
let dist = client.view_distance(); let dist = client.view_distance();

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@ -16,7 +16,7 @@ use crate::packets::play::s2c::{
use crate::protocol::{Encode, Nbt}; use crate::protocol::{Encode, Nbt};
use crate::var_int::VarInt; use crate::var_int::VarInt;
use crate::var_long::VarLong; use crate::var_long::VarLong;
use crate::{BiomeId, BlockPos, DimensionId, Server, Ticks}; use crate::{BiomeId, BlockPos, ChunkPos, DimensionId, Server, Ticks};
pub struct Chunks { pub struct Chunks {
chunks: HashMap<ChunkPos, Chunk>, chunks: HashMap<ChunkPos, Chunk>,
@ -390,55 +390,6 @@ impl From<BlockChangePacket> for S2cPlayPacket {
} }
} }
/// The X and Z position of a chunk in a world.
#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
pub struct ChunkPos {
/// The X position of the chunk.
pub x: i32,
/// The Z position of the chunk.
pub z: i32,
}
impl ChunkPos {
pub const fn new(x: i32, z: i32) -> Self {
Self { x, z }
}
pub fn at(x: f64, z: f64) -> Self {
Self::new((x / 16.0).floor() as i32, (z / 16.0).floor() as i32)
}
}
impl From<(i32, i32)> for ChunkPos {
fn from((x, z): (i32, i32)) -> Self {
ChunkPos { x, z }
}
}
impl Into<(i32, i32)> for ChunkPos {
fn into(self) -> (i32, i32) {
(self.x, self.z)
}
}
impl From<[i32; 2]> for ChunkPos {
fn from([x, z]: [i32; 2]) -> Self {
(x, z).into()
}
}
impl Into<[i32; 2]> for ChunkPos {
fn into(self) -> [i32; 2] {
[self.x, self.z]
}
}
impl From<BlockPos> for ChunkPos {
fn from(pos: BlockPos) -> Self {
Self::new(pos.x.div_euclid(16), pos.z.div_euclid(16))
}
}
/// A 16x16x16 section of blocks, biomes, and light in a chunk. /// A 16x16x16 section of blocks, biomes, and light in a chunk.
#[derive(Clone)] #[derive(Clone)]
struct ChunkSection { struct ChunkSection {

50
src/chunk_pos.rs Normal file
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@ -0,0 +1,50 @@
use crate::BlockPos;
/// The X and Z position of a chunk in a world.
#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
pub struct ChunkPos {
/// The X position of the chunk.
pub x: i32,
/// The Z position of the chunk.
pub z: i32,
}
impl ChunkPos {
pub const fn new(x: i32, z: i32) -> Self {
Self { x, z }
}
pub fn at(x: f64, z: f64) -> Self {
Self::new((x / 16.0).floor() as i32, (z / 16.0).floor() as i32)
}
}
impl From<(i32, i32)> for ChunkPos {
fn from((x, z): (i32, i32)) -> Self {
ChunkPos { x, z }
}
}
impl Into<(i32, i32)> for ChunkPos {
fn into(self) -> (i32, i32) {
(self.x, self.z)
}
}
impl From<[i32; 2]> for ChunkPos {
fn from([x, z]: [i32; 2]) -> Self {
(x, z).into()
}
}
impl Into<[i32; 2]> for ChunkPos {
fn into(self) -> [i32; 2] {
[self.x, self.z]
}
}
impl From<BlockPos> for ChunkPos {
fn from(pos: BlockPos) -> Self {
Self::new(pos.x.div_euclid(16), pos.z.div_euclid(16))
}
}

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@ -630,8 +630,12 @@ impl<'a> ClientMut<'a> {
.map(|(id, pos)| (ident!("{LIBRARY_NAMESPACE}:dimension_{}", id.0), pos)), .map(|(id, pos)| (ident!("{LIBRARY_NAMESPACE}:dimension_{}", id.0), pos)),
}); });
meta.player_list()
.initial_packets(|pkt| self.send_packet(pkt));
self.teleport(self.position(), self.yaw(), self.pitch()); self.teleport(self.position(), self.yaw(), self.pitch());
} else if self.0.old_game_mode != self.0.new_game_mode { } else {
if self.0.old_game_mode != self.0.new_game_mode {
self.0.old_game_mode = self.0.new_game_mode; self.0.old_game_mode = self.0.new_game_mode;
self.send_packet(ChangeGameState { self.send_packet(ChangeGameState {
reason: ChangeGameStateReason::ChangeGameMode, reason: ChangeGameStateReason::ChangeGameMode,
@ -639,6 +643,9 @@ impl<'a> ClientMut<'a> {
}); });
} }
meta.player_list().packets(|pkt| self.send_packet(pkt));
}
// Update the players spawn position (compass position) // Update the players spawn position (compass position)
if self.0.modified_spawn_position { if self.0.modified_spawn_position {
self.0.modified_spawn_position = false; self.0.modified_spawn_position = false;

View file

@ -394,7 +394,7 @@ impl Entity {
EntityMeta::Giant(_) => [3.6, 12.0, 3.6], EntityMeta::Giant(_) => [3.6, 12.0, 3.6],
EntityMeta::GlowItemFrame(_) => todo!("account for rotation"), EntityMeta::GlowItemFrame(_) => todo!("account for rotation"),
EntityMeta::GlowSquid(_) => [0.8, 0.8, 0.8], EntityMeta::GlowSquid(_) => [0.8, 0.8, 0.8],
EntityMeta::Goat(e) => [1.3, 0.9, 1.3], // TODO: baby size? EntityMeta::Goat(_) => [1.3, 0.9, 1.3], // TODO: baby size?
EntityMeta::Guardian(_) => [0.85, 0.85, 0.85], EntityMeta::Guardian(_) => [0.85, 0.85, 0.85],
EntityMeta::Hoglin(_) => [1.39648, 1.4, 1.39648], // TODO: baby size? EntityMeta::Hoglin(_) => [1.39648, 1.4, 1.39648], // TODO: baby size?
EntityMeta::Horse(_) => [1.39648, 1.6, 1.39648], // TODO: baby size? EntityMeta::Horse(_) => [1.39648, 1.6, 1.39648], // TODO: baby size?

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@ -13,6 +13,7 @@ mod block_pos;
mod bvh; mod bvh;
mod byte_angle; mod byte_angle;
pub mod chunk; pub mod chunk;
mod chunk_pos;
pub mod client; pub mod client;
mod codec; mod codec;
pub mod config; pub mod config;
@ -20,6 +21,7 @@ pub mod dimension;
pub mod entity; pub mod entity;
pub mod ident; pub mod ident;
mod packets; mod packets;
mod player_list;
mod protocol; mod protocol;
pub mod server; pub mod server;
mod slotmap; mod slotmap;
@ -34,7 +36,8 @@ pub use async_trait::async_trait;
pub use biome::{Biome, BiomeId}; pub use biome::{Biome, BiomeId};
pub use block::BlockState; pub use block::BlockState;
pub use block_pos::BlockPos; pub use block_pos::BlockPos;
pub use chunk::{Chunk, ChunkPos, Chunks, ChunksMut}; pub use chunk::{Chunk, Chunks, ChunksMut};
pub use chunk_pos::ChunkPos;
pub use client::{Client, ClientMut, Clients, ClientsMut}; pub use client::{Client, ClientMut, Clients, ClientsMut};
pub use config::Config; pub use config::Config;
pub use dimension::{Dimension, DimensionId}; pub use dimension::{Dimension, DimensionId};

View file

@ -1131,6 +1131,13 @@ pub mod play {
} }
} }
def_struct! {
PlayerListHeaderFooter 0x60 {
header: Text,
footer: Text,
}
}
def_struct! { def_struct! {
EntityTeleport 0x63 { EntityTeleport 0x63 {
entity_id: VarInt, entity_id: VarInt,
@ -1219,6 +1226,8 @@ pub mod play {
EntityPosition, EntityPosition,
EntityPositionAndRotation, EntityPositionAndRotation,
EntityRotation, EntityRotation,
ChatMessage,
PlayerInfo,
PlayerPositionAndLook, PlayerPositionAndLook,
DestroyEntities, DestroyEntities,
EntityHeadLook, EntityHeadLook,
@ -1230,6 +1239,7 @@ pub mod play {
EntityMetadata, EntityMetadata,
EntityVelocity, EntityVelocity,
TimeUpdate, TimeUpdate,
PlayerListHeaderFooter,
EntityTeleport, EntityTeleport,
} }
} }

385
src/player_list.rs Normal file
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@ -0,0 +1,385 @@
use std::collections::hash_map::Entry;
use std::collections::{HashMap, HashSet};
use std::ops::Deref;
use bitfield_struct::bitfield;
use serde::{Deserialize, Serialize};
use url::Url;
use uuid::Uuid;
use crate::client::GameMode;
use crate::packets::login::s2c::Property;
use crate::packets::play::s2c::{
PlayerInfo, PlayerInfoAddPlayer, PlayerListHeaderFooter, S2cPlayPacket,
};
use crate::var_int::VarInt;
use crate::Text;
pub struct PlayerList {
entries: HashMap<Uuid, PlayerListEntry>,
removed: HashSet<Uuid>,
header: Text,
footer: Text,
modified_header_or_footer: bool,
}
impl PlayerList {
pub(crate) fn new() -> Self {
Self {
entries: HashMap::new(),
removed: HashSet::new(),
header: Text::default(),
footer: Text::default(),
modified_header_or_footer: false,
}
}
pub fn header(&self) -> &Text {
&self.header
}
pub fn footer(&self) -> &Text {
&self.footer
}
pub fn entries(&self) -> impl Iterator<Item = (Uuid, &PlayerListEntry)> + '_ {
self.entries.iter().map(|(k, v)| (*k, v))
}
pub(crate) fn initial_packets(&self, mut packet: impl FnMut(S2cPlayPacket)) {
let add_player: Vec<_> = self
.entries
.iter()
.map(|(&uuid, e)| PlayerInfoAddPlayer {
uuid,
username: e.username.clone().into(),
properties: {
let mut properties = Vec::new();
if e.skin().is_some() || e.cape().is_some() {
let textures = PlayerTextures {
skin: e.skin().cloned().map(TextureUrl::new),
cape: e.cape().cloned().map(TextureUrl::new),
};
properties.push(Property {
name: "textures".into(),
value: base64::encode(serde_json::to_string(&textures).unwrap()),
signature: None,
});
}
properties
},
game_mode: e.game_mode,
ping: VarInt(e.ping),
display_name: e.display_name.clone(),
sig_data: None,
})
.collect();
if !add_player.is_empty() {
packet(PlayerInfo::AddPlayer(add_player).into());
}
if self.header != Text::default() || self.footer != Text::default() {
packet(
PlayerListHeaderFooter {
header: self.header.clone(),
footer: self.footer.clone(),
}
.into(),
);
}
}
pub(crate) fn packets(&self, mut packet: impl FnMut(S2cPlayPacket)) {
if !self.removed.is_empty() {
packet(PlayerInfo::RemovePlayer(self.removed.iter().cloned().collect()).into());
}
let mut add_player = Vec::new();
let mut game_mode = Vec::new();
let mut ping = Vec::new();
let mut display_name = Vec::new();
for (&uuid, e) in self.entries.iter() {
if e.flags.created_this_tick() {
let mut properties = Vec::new();
if e.skin().is_some() || e.cape().is_some() {
let textures = PlayerTextures {
skin: e.skin().cloned().map(TextureUrl::new),
cape: e.cape().cloned().map(TextureUrl::new),
};
properties.push(Property {
name: "textures".into(),
value: base64::encode(serde_json::to_string(&textures).unwrap()),
signature: None,
});
}
add_player.push(PlayerInfoAddPlayer {
uuid,
username: e.username.clone().into(),
properties,
game_mode: e.game_mode,
ping: VarInt(e.ping),
display_name: e.display_name.clone(),
sig_data: None,
});
continue;
}
if e.flags.modified_game_mode() {
game_mode.push((uuid, e.game_mode));
}
if e.flags.modified_ping() {
ping.push((uuid, VarInt(e.ping)));
}
if e.flags.modified_display_name() {
display_name.push((uuid, e.display_name.clone()));
}
}
if !add_player.is_empty() {
packet(PlayerInfo::AddPlayer(add_player).into());
}
if !game_mode.is_empty() {
packet(PlayerInfo::UpdateGameMode(game_mode).into());
}
if !ping.is_empty() {
packet(PlayerInfo::UpdateLatency(ping).into());
}
if !display_name.is_empty() {
packet(PlayerInfo::UpdateDisplayName(display_name).into());
}
if self.modified_header_or_footer {
packet(
PlayerListHeaderFooter {
header: self.header.clone(),
footer: self.footer.clone(),
}
.into(),
);
}
}
}
pub struct PlayerListMut<'a>(pub(crate) &'a mut PlayerList);
impl<'a> Deref for PlayerListMut<'a> {
type Target = PlayerList;
fn deref(&self) -> &Self::Target {
&self.0
}
}
impl<'a> PlayerListMut<'a> {
pub fn reborrow(&mut self) -> PlayerListMut {
PlayerListMut(self.0)
}
pub fn add_player(
&mut self,
uuid: Uuid,
username: impl Into<String>,
skin: Option<Url>,
cape: Option<Url>,
game_mode: GameMode,
ping: i32,
display_name: impl Into<Option<Text>>,
) {
match self.0.entries.entry(uuid) {
Entry::Occupied(mut oe) => {
let mut entry = PlayerListEntryMut(oe.get_mut());
let username = username.into();
if entry.username() != username
|| entry.skin() != skin.as_ref()
|| entry.cape() != cape.as_ref()
{
self.0.removed.insert(*oe.key());
oe.insert(PlayerListEntry {
username,
textures: PlayerTextures {
skin: skin.map(TextureUrl::new),
cape: cape.map(TextureUrl::new),
},
game_mode,
ping,
display_name: display_name.into(),
flags: EntryFlags::new().with_created_this_tick(true),
});
} else {
entry.set_game_mode(game_mode);
entry.set_ping(ping);
entry.set_display_name(display_name);
}
}
Entry::Vacant(ve) => {
ve.insert(PlayerListEntry {
username: username.into(),
textures: PlayerTextures {
skin: skin.map(TextureUrl::new),
cape: cape.map(TextureUrl::new),
},
game_mode,
ping,
display_name: display_name.into(),
flags: EntryFlags::new().with_created_this_tick(true),
});
}
}
}
pub fn remove_player(&mut self, uuid: Uuid) -> bool {
if self.0.entries.remove(&uuid).is_some() {
self.0.removed.insert(uuid);
true
} else {
false
}
}
pub fn set_header(&mut self, header: impl Into<Text>) {
let header = header.into();
if self.0.header != header {
self.0.header = header;
self.0.modified_header_or_footer = true;
}
}
pub fn set_footer(&mut self, footer: impl Into<Text>) {
let footer = footer.into();
if self.0.footer != footer {
self.0.footer = footer;
self.0.modified_header_or_footer = true;
}
}
pub fn entries_mut(&mut self) -> impl Iterator<Item = (Uuid, PlayerListEntryMut)> + '_ {
self.0
.entries
.iter_mut()
.map(|(k, v)| (*k, PlayerListEntryMut(v)))
}
pub(crate) fn update(&mut self) {
for e in self.0.entries.values_mut() {
e.flags = EntryFlags(0);
}
self.0.removed.clear();
self.0.modified_header_or_footer = false;
}
}
pub struct PlayerListEntry {
username: String,
textures: PlayerTextures,
game_mode: GameMode,
ping: i32,
display_name: Option<Text>,
flags: EntryFlags,
}
impl PlayerListEntry {
pub fn username(&self) -> &str {
&self.username
}
pub fn skin(&self) -> Option<&Url> {
self.textures.skin.as_ref().map(|t| &t.url)
}
pub fn cape(&self) -> Option<&Url> {
self.textures.cape.as_ref().map(|t| &t.url)
}
pub fn game_mode(&self) -> GameMode {
self.game_mode
}
pub fn ping(&self) -> i32 {
self.ping
}
pub fn display_name(&self) -> Option<&Text> {
self.display_name.as_ref()
}
}
pub struct PlayerListEntryMut<'a>(&'a mut PlayerListEntry);
impl<'a> Deref for PlayerListEntryMut<'a> {
type Target = PlayerListEntry;
fn deref(&self) -> &Self::Target {
&self.0
}
}
impl<'a> PlayerListEntryMut<'a> {
pub fn reborrow(&mut self) -> PlayerListEntryMut {
PlayerListEntryMut(self.0)
}
pub fn set_game_mode(&mut self, game_mode: GameMode) {
if self.0.game_mode != game_mode {
self.0.game_mode = game_mode;
self.0.flags.set_modified_game_mode(true);
}
}
pub fn set_ping(&mut self, ping: i32) {
if self.0.ping != ping {
self.0.ping = ping;
self.0.flags.set_modified_ping(true);
}
}
pub fn set_display_name(&mut self, display_name: impl Into<Option<Text>>) {
let display_name = display_name.into();
if self.0.display_name != display_name {
self.0.display_name = display_name;
self.0.flags.set_modified_display_name(true);
}
}
}
#[bitfield(u8)]
struct EntryFlags {
created_this_tick: bool,
modified_game_mode: bool,
modified_ping: bool,
modified_display_name: bool,
#[bits(4)]
_pad: u8,
}
#[derive(Clone, PartialEq, Debug, Serialize, Deserialize)]
#[serde(rename_all = "UPPERCASE")]
pub(crate) struct PlayerTextures {
#[serde(default, skip_serializing_if = "Option::is_none")]
skin: Option<TextureUrl>,
#[serde(default, skip_serializing_if = "Option::is_none")]
cape: Option<TextureUrl>,
}
#[derive(Clone, PartialEq, Debug, Serialize, Deserialize)]
struct TextureUrl {
url: Url,
}
impl TextureUrl {
fn new(url: Url) -> Self {
Self { url }
}
}

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@ -36,6 +36,7 @@ use crate::packets::play::c2s::C2sPlayPacket;
use crate::packets::play::s2c::S2cPlayPacket; use crate::packets::play::s2c::S2cPlayPacket;
use crate::packets::status::c2s::{Ping, Request}; use crate::packets::status::c2s::{Ping, Request};
use crate::packets::status::s2c::{Pong, Response}; use crate::packets::status::s2c::{Pong, Response};
use crate::player_list::PlayerTextures;
use crate::protocol::{BoundedArray, BoundedString}; use crate::protocol::{BoundedArray, BoundedString};
use crate::util::valid_username; use crate::util::valid_username;
use crate::var_int::VarInt; use crate::var_int::VarInt;
@ -396,6 +397,8 @@ fn do_update_loop(server: Server, mut worlds: WorldsMut) -> ShutdownResult {
world.chunks.par_iter_mut().for_each(|(_, mut chunk)| { world.chunks.par_iter_mut().for_each(|(_, mut chunk)| {
chunk.apply_modifications(); chunk.apply_modifications();
}); });
world.meta.update();
}); });
// Sleep for the remainder of the tick. // Sleep for the remainder of the tick.
@ -585,7 +588,7 @@ async fn handle_login(
ensure!(valid_username(&username), "invalid username '{username}'"); ensure!(valid_username(&username), "invalid username '{username}'");
let (uuid, _skin_blob) = if server.0.online_mode { let (uuid, textures) = if server.0.online_mode {
let my_verify_token: [u8; 16] = rand::random(); let my_verify_token: [u8; 16] = rand::random();
c.0.write_packet(&EncryptionRequest { c.0.write_packet(&EncryptionRequest {
@ -666,12 +669,12 @@ async fn handle_login(
let uuid = Uuid::parse_str(&data.id).context("failed to parse player's UUID")?; let uuid = Uuid::parse_str(&data.id).context("failed to parse player's UUID")?;
let skin_blob = match data.properties.iter().find(|p| p.name == "textures") { let textures = match data.properties.into_iter().find(|p| p.name == "textures") {
Some(p) => base64::decode(&p.value).context("failed to parse skin blob")?, Some(p) => decode_textures(p.value).context("failed to decode skin blob")?,
None => bail!("failed to find skin blob in auth response"), None => bail!("failed to find skin blob in auth response"),
}; };
(uuid, Some(skin_blob)) (uuid, Some(textures))
} else { } else {
// Derive the player's UUID from a hash of their username. // Derive the player's UUID from a hash of their username.
let uuid = Uuid::from_slice(&Sha256::digest(&username)[..16]).unwrap(); let uuid = Uuid::from_slice(&Sha256::digest(&username)[..16]).unwrap();
@ -710,6 +713,17 @@ async fn handle_login(
Ok(Some(npd)) Ok(Some(npd))
} }
fn decode_textures(encoded: String) -> anyhow::Result<PlayerTextures> {
#[derive(Debug, Deserialize)]
struct Textures {
textures: PlayerTextures,
}
let bytes = base64::decode(encoded)?;
let textures: Textures = serde_json::from_slice(&bytes)?;
Ok(textures.textures)
}
async fn handle_play(server: &Server, c: Codec, ncd: NewClientData) -> anyhow::Result<()> { async fn handle_play(server: &Server, c: Codec, ncd: NewClientData) -> anyhow::Result<()> {
let (reply_tx, reply_rx) = oneshot::channel(); let (reply_tx, reply_rx) = oneshot::channel();

View file

@ -3,6 +3,7 @@ use std::ops::Deref;
use rayon::iter::ParallelIterator; use rayon::iter::ParallelIterator;
use crate::player_list::{PlayerList, PlayerListMut};
use crate::slotmap::{Key, SlotMap}; use crate::slotmap::{Key, SlotMap};
use crate::{ use crate::{
Chunks, ChunksMut, Clients, ClientsMut, DimensionId, Entities, EntitiesMut, Server, Chunks, ChunksMut, Clients, ClientsMut, DimensionId, Entities, EntitiesMut, Server,
@ -66,6 +67,7 @@ impl<'a> WorldsMut<'a> {
meta: WorldMeta { meta: WorldMeta {
dimension: dim, dimension: dim,
is_flat: false, is_flat: false,
player_list: PlayerList::new(),
}, },
}); });
@ -183,6 +185,7 @@ impl<'a> WorldMut<'a> {
pub struct WorldMeta { pub struct WorldMeta {
dimension: DimensionId, dimension: DimensionId,
is_flat: bool, is_flat: bool,
player_list: PlayerList,
// TODO: time, weather // TODO: time, weather
} }
@ -194,6 +197,10 @@ impl WorldMeta {
pub fn is_flat(&self) -> bool { pub fn is_flat(&self) -> bool {
self.is_flat self.is_flat
} }
pub fn player_list(&self) -> &PlayerList {
&self.player_list
}
} }
pub struct WorldMetaMut<'a>(&'a mut WorldMeta); pub struct WorldMetaMut<'a>(&'a mut WorldMeta);
@ -210,4 +217,12 @@ impl<'a> WorldMetaMut<'a> {
pub fn set_flat(&mut self, flat: bool) { pub fn set_flat(&mut self, flat: bool) {
self.0.is_flat = flat; self.0.is_flat = flat;
} }
pub fn player_list_mut(&mut self) -> PlayerListMut {
PlayerListMut(&mut self.0.player_list)
}
pub(crate) fn update(&mut self) {
self.player_list_mut().update();
}
} }