Update READMEs

README.md

@@ -1,5 +1,17 @@
 # SeaBattle
+[![Build Status](https://drone.communiquons.org/api/badges/pierre/SeaBattle/status.svg)](https://drone.communiquons.org/pierre/SeaBattle)
+
 
 Full stack sea battle game.
 
-Current status: working on backend, and then building web ui...
+
+## Implementations
+Current implementations:
+- [x] Rust shell implementations ([server](rust/sea_battle_backend) and [client](rust/sea_battle_cli_player))
+- [ ] web implementation
+- [ ] mobile implementation
+
+## Screenshots
+
+### Shell implementation
+![Shell implementation example](rust/sea_battle_cli_player/img/SeaBattleCli.png)

rust/Cargo.lock

@@ -456,31 +456,6 @@ dependencies = [
  "os_str_bytes",
 ]
 
-[[package]]
-name = "cli_player"
-version = "0.1.0"
-dependencies = [
- "clap",
- "crossterm",
- "env_logger",
- "futures",
- "hostname",
- "hyper-rustls",
- "lazy_static",
- "log",
- "num",
- "num-derive",
- "num-traits",
- "rustls",
- "sea_battle_backend",
- "serde_json",
- "serde_urlencoded",
- "textwrap",
- "tokio",
- "tokio-tungstenite",
- "tui",
-]
-
 [[package]]
 name = "codespan-reporting"
 version = "0.11.1"
@@ -1564,6 +1539,31 @@ dependencies = [
  "uuid",
 ]
 
+[[package]]
+name = "sea_battle_cli_player"
+version = "0.1.0"
+dependencies = [
+ "clap",
+ "crossterm",
+ "env_logger",
+ "futures",
+ "hostname",
+ "hyper-rustls",
+ "lazy_static",
+ "log",
+ "num",
+ "num-derive",
+ "num-traits",
+ "rustls",
+ "sea_battle_backend",
+ "serde_json",
+ "serde_urlencoded",
+ "textwrap",
+ "tokio",
+ "tokio-tungstenite",
+ "tui",
+]
+
 [[package]]
 name = "security-framework"
 version = "2.7.0"

rust/Cargo.toml

@@ -2,5 +2,5 @@
 
 members = [
  "sea_battle_backend",
- "cli_player"
+ "sea_battle_cli_player"
 ]

rust/sea_battle_backend/Cargo.toml

@@ -2,6 +2,12 @@
 name = "sea_battle_backend"
 version = "0.1.0"
 edition = "2021"
+license = "GPL-2.0-or-later"
+description = "A Sea Battle game backend server"
+repository = "https://gitea.communiquons.org/pierre/SeaBattle"
+readme = "README.md"
+authors = ["Pierre Hubert <pierre.git@communiquons.org>"]
+categories = [ "games" ]
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 

rust/sea_battle_backend/README.md

@@ -0,0 +1,30 @@
+# Sea battle backend
+[![Build Status](https://drone.communiquons.org/api/badges/pierre/SeaBattle/status.svg)](https://drone.communiquons.org/pierre/SeaBattle)
+[![Crate](https://img.shields.io/crates/v/sea_battle_backend.svg)](https://crates.io/crates/sea_battle_backend)
+[![Documentation](https://docs.rs/sea_battle_backend/badge.svg)](https://docs.rs/sea_battle_backend/)
+
+A backend HTTP server for the Sea Battle game. The binary included in
+this crate can be used to deploy a server that will allow players to
+connect to play together.
+
+The `actix-web` library is used to spawn HTTP server. The games are encapsulated
+inside websockets.
+
+An official server is running at https://seabattleapi.communiquons.org/
+
+## Installation
+You can install the backend using the following command:
+
+```bash
+cargo install sea_battle_backend
+```
+
+## Usage
+```bash
+sea_battle_backend -l 0.0.0.0:7000
+```
+
+> Note: a reverse-proxy must be used to protect
+
+## Client
+A command-line client is available in the [sea_battle_cli_player](https://crates.io/crates/sea_battle_cli_player) crate.

rust/sea_battle_backend/src/consts.rs

@@ -24,3 +24,6 @@ pub const INVITE_CODE_LENGTH: usize = 5;
 
 pub const MIN_PLAYER_NAME_LENGTH: usize = 1;
 pub const MAX_PLAYER_NAME_LENGTH: usize = 10;
+
+pub const MIN_STRIKE_TIMEOUT: u64 = 5;
+pub const MAX_STRIKE_TIMEOUT: u64 = 90;

rust/sea_battle_backend/src/data/boats_layout.rs

@@ -489,6 +489,7 @@ mod test {
             boats_str: "1,1".to_string(),
             boats_can_touch: false,
             player_continue_on_hit: false,
+            strike_timeout: None,
             bot_type: BotType::Random,
         };
 

rust/sea_battle_backend/src/data/current_game_status.rs

@@ -78,6 +78,7 @@ impl PrintableMap for PrintableCurrentGameMapStatus {
 
 #[derive(Debug, serde::Serialize, serde::Deserialize, Clone, Default)]
 pub struct CurrentGameStatus {
+    pub remaining_time_for_strike: Option<u64>,
     pub rules: GameRules,
     pub your_map: CurrentGameMapStatus,
     pub opponent_map: CurrentGameMapStatus,

rust/sea_battle_backend/src/data/game_rules.rs

@@ -1,6 +1,6 @@
 use crate::consts::*;
 use crate::data::{BotType, PlayConfiguration};
-use serde_with::{serde_as, DisplayFromStr};
+use serde_with::{serde_as, DisplayFromStr, NoneAsEmptyString};
 
 #[serde_as]
 #[derive(serde::Serialize, serde::Deserialize, Debug, Clone, Eq, PartialEq)]
@@ -15,6 +15,8 @@ pub struct GameRules {
     pub boats_can_touch: bool,
     #[serde_as(as = "DisplayFromStr")]
     pub player_continue_on_hit: bool,
+    #[serde_as(as = "NoneAsEmptyString")]
+    pub strike_timeout: Option<u64>,
     pub bot_type: BotType,
 }
 
@@ -36,6 +38,7 @@ impl GameRules {
                 .join(","),
             boats_can_touch: MULTI_PLAYER_BOATS_CAN_TOUCH,
             player_continue_on_hit: MULTI_PLAYER_PLAYER_CAN_CONTINUE_AFTER_HIT,
+            strike_timeout: Some(30),
             bot_type: BotType::Smart,
         }
     }
@@ -50,6 +53,11 @@ impl GameRules {
         self
     }
 
+    pub fn with_strike_timeout(mut self, timeout: u64) -> Self {
+        self.strike_timeout = Some(timeout);
+        self
+    }
+
     /// Set the list of boats for this configuration
     pub fn set_boats_list(&mut self, boats: &[usize]) {
         self.boats_str = boats
@@ -121,6 +129,16 @@ impl GameRules {
             }
         }
 
+        if let Some(timeout) = self.strike_timeout {
+            if timeout < config.min_strike_timeout {
+                errors.push("Strike timeout is too short!");
+            }
+
+            if timeout > config.max_strike_timeout {
+                errors.push("Strike timeout is too long!");
+            }
+        }
+
         errors
     }
 

rust/sea_battle_backend/src/data/play_config.rs

@@ -59,6 +59,8 @@ pub struct PlayConfiguration {
     pub ordinate_alphabet: &'static str,
     pub min_player_name_len: usize,
     pub max_player_name_len: usize,
+    pub min_strike_timeout: u64,
+    pub max_strike_timeout: u64,
 }
 
 impl Default for PlayConfiguration {
@@ -76,6 +78,8 @@ impl Default for PlayConfiguration {
             ordinate_alphabet: ALPHABET,
             min_player_name_len: MIN_PLAYER_NAME_LENGTH,
             max_player_name_len: MAX_PLAYER_NAME_LENGTH,
+            min_strike_timeout: MIN_STRIKE_TIMEOUT,
+            max_strike_timeout: MAX_STRIKE_TIMEOUT,
         }
     }
 }

rust/sea_battle_backend/src/game.rs

@@ -1,4 +1,5 @@
 use std::sync::Arc;
+use std::time::Duration;
 
 use actix::prelude::*;
 use actix::{Actor, Context, Handler};
@@ -6,6 +7,7 @@ use uuid::Uuid;
 
 use crate::bot_player::BotPlayer;
 use crate::data::*;
+use crate::utils::time_utils::time;
 
 pub trait Player {
     fn get_name(&self) -> &str;
@@ -51,6 +53,9 @@ pub trait Player {
     fn opponent_replaced_by_bot(&self);
 }
 
+/// How often strike timeout controller is run
+const STRIKE_TIMEOUT_CONTROL: Duration = Duration::from_secs(1);
+
 fn opponent(index: usize) -> usize {
     match index {
         0 => 1,
@@ -85,6 +90,7 @@ pub struct Game {
     map_0: Option<GameMap>,
     map_1: Option<GameMap>,
     turn: usize,
+    curr_strike_request_started: u64,
 }
 
 impl Game {
@@ -96,6 +102,7 @@ impl Game {
             map_0: None,
             map_1: None,
             turn: 0,
+            curr_strike_request_started: 0,
         }
     }
 
@@ -130,10 +137,14 @@ impl Game {
             self.turn
         );
 
-        self.request_fire();
+        self.request_fire(true);
     }
 
-    fn request_fire(&self) {
+    fn request_fire(&mut self, reset_counter: bool) {
+        if reset_counter {
+            self.curr_strike_request_started = time();
+        }
+
         self.players[self.turn].request_fire(self.get_game_status_for_player(self.turn));
         self.players[opponent(self.turn)]
             .opponent_must_fire(self.get_game_status_for_player(opponent(self.turn)));
@@ -148,6 +159,27 @@ impl Game {
         .unwrap()
     }
 
+    /// Replace user for a fire in case of timeout
+    fn force_fire_in_case_of_timeout(&mut self) {
+        if self.status != GameStatus::Started || self.rules.strike_timeout.is_none() {
+            return;
+        }
+
+        let timeout = self.rules.strike_timeout.unwrap_or_default();
+
+        if time() <= self.curr_strike_request_started + timeout {
+            return;
+        }
+
+        // Determine target of fire
+        let target = self
+            .get_game_status_for_player(self.turn)
+            .find_fire_coordinates_for_bot_type(self.rules.bot_type);
+
+        // Fire as player
+        self.handle_fire(target);
+    }
+
     fn player_map_mut(&mut self, id: usize) -> &mut GameMap {
         match id {
             0 => self.map_0.as_mut(),
@@ -166,7 +198,7 @@ impl Game {
         // Easiest case : player missed his fire
         if result == FireResult::Missed {
             self.turn = opponent(self.turn);
-            self.request_fire();
+            self.request_fire(true);
             return;
         }
 
@@ -188,7 +220,9 @@ impl Game {
             self.turn = opponent(self.turn);
         }
 
-        self.request_fire();
+        self.request_fire(
+            result != FireResult::AlreadyTargetedPosition && result != FireResult::Rejected,
+        );
     }
 
     fn handle_request_rematch(&mut self, player_id: Uuid) {
@@ -223,6 +257,9 @@ impl Game {
     /// Get current game status for a specific player
     fn get_game_status_for_player(&self, id: usize) -> CurrentGameStatus {
         CurrentGameStatus {
+            remaining_time_for_strike: self.rules.strike_timeout.map(|v| {
+                ((self.curr_strike_request_started + v) as i64 - time() as i64).max(0) as u64
+            }),
             rules: self.rules.clone(),
             your_map: self.player_map(id).current_map_status(false),
             opponent_map: self
@@ -234,6 +271,14 @@ impl Game {
 
 impl Actor for Game {
     type Context = Context<Self>;
+
+    fn started(&mut self, ctx: &mut Self::Context) {
+        if self.rules.strike_timeout.is_some() {
+            ctx.run_interval(STRIKE_TIMEOUT_CONTROL, |act, _ctx| {
+                act.force_fire_in_case_of_timeout();
+            });
+        }
+    }
 }
 
 #[derive(Message)]
@@ -387,7 +432,7 @@ impl Handler<PlayerLeftGame> for Game {
 
             // Re-do current action
             if self.status == GameStatus::Started {
-                self.request_fire();
+                self.request_fire(true);
             } else if self.status == GameStatus::WaitingForBoatsDisposition {
                 self.players[offline_player].query_boats_layout(&self.rules);
             }

rust/sea_battle_backend/src/human_player_ws.rs

@@ -152,6 +152,7 @@ impl Actor for HumanPlayerWS {
     fn started(&mut self, ctx: &mut Self::Context) {
         // Check player name length
         if self.name.len() < MIN_PLAYER_NAME_LENGTH || self.name.len() > MAX_PLAYER_NAME_LENGTH {
+            log::error!("Close connection due to invalid user name!");
             ctx.stop();
             return;
         }

rust/sea_battle_backend/src/server.rs

@@ -163,6 +163,7 @@ pub async fn start_server(args: Args) -> std::io::Result<()> {
 
 #[cfg(test)]
 mod test {
+    use crate::data::GameRules;
     use crate::server::BotPlayQuery;
 
     #[test]
@@ -177,4 +178,20 @@ mod test {
 
         assert_eq!(query, des)
     }
+
+    #[test]
+    fn simple_bot_request_serialize_deserialize_no_timeout() {
+        let query = BotPlayQuery {
+            rules: GameRules {
+                strike_timeout: None,
+                ..Default::default()
+            },
+            player_name: "Player".to_string(),
+        };
+
+        let string = serde_urlencoded::to_string(&query).unwrap();
+        let des = serde_urlencoded::from_str(&string).unwrap();
+
+        assert_eq!(query, des)
+    }
 }

rust/sea_battle_backend/src/test/bot_client.rs

@@ -39,7 +39,7 @@ pub struct BotClient {
     requested_rules: GameRules,
     layout: Option<BoatsLayout>,
     number_plays: usize,
-    server_msg_callback: Option<Box<dyn FnMut(&ServerMessage)>>,
+    server_msg_callback: Option<Box<dyn FnMut(&mut ServerMessage)>>,
     play_as_bot_type: BotType,
 }
 
@@ -81,7 +81,7 @@ impl BotClient {
 
     pub fn with_server_msg_callback<F>(mut self, cb: F) -> Self
     where
-        F: FnMut(&ServerMessage) + 'static,
+        F: FnMut(&mut ServerMessage) + 'static,
     {
         self.server_msg_callback = Some(Box::new(cb));
         self
@@ -152,7 +152,7 @@ impl BotClient {
         };
 
         while let Some(chunk) = socket.next().await {
-            let message = match chunk? {
+            let mut message = match chunk? {
                 Message::Text(message) => {
                     log::trace!("TEXT message from server: {}", message);
 
@@ -182,7 +182,7 @@ impl BotClient {
             };
 
             if let Some(cb) = &mut self.server_msg_callback {
-                (cb)(&message)
+                (cb)(&mut message)
             }
 
             match message {

rust/sea_battle_backend/src/test/bot_linear_play.rs

@@ -9,7 +9,7 @@ use crate::test::play_utils::check_no_replay_on_hit;
 use crate::test::{bot_client, TestPort};
 use crate::utils::network_utils::wait_for_port;
 
-fn check_strikes_are_linear(msg: &ServerMessage) {
+fn check_strikes_are_linear(msg: &mut ServerMessage) {
     if let ServerMessage::RequestFire { status } = msg {
         let mut in_fire_location = true;
         for y in 0..status.rules.map_height {

rust/sea_battle_backend/src/test/bot_random_play.rs

@@ -1,13 +1,16 @@
 use tokio::task;
 
 use crate::args::Args;
+use crate::consts::MIN_STRIKE_TIMEOUT;
 use crate::data::{BoatsLayout, GameRules};
+use crate::human_player_ws::ServerMessage;
 use crate::server::start_server;
 use crate::test::bot_client;
 use crate::test::bot_client::ClientEndResult;
 use crate::test::play_utils::check_no_replay_on_hit;
 use crate::test::TestPort;
 use crate::utils::network_utils::wait_for_port;
+use crate::utils::time_utils::time;
 
 #[tokio::test]
 async fn invalid_port() {
@@ -201,3 +204,37 @@ async fn full_game_no_replay_on_hit() {
         })
         .await;
 }
+
+#[tokio::test]
+async fn check_fire_time_out() {
+    let _ = env_logger::builder().is_test(true).try_init();
+
+    let local_set = task::LocalSet::new();
+    local_set
+        .run_until(async move {
+            task::spawn_local(start_server(Args::for_test(TestPort::RandomCheckTimeout)));
+            wait_for_port(TestPort::RandomCheckTimeout.port()).await;
+
+            let start = time();
+
+            let mut did_skip_one = false;
+            let res = bot_client::BotClient::new(TestPort::RandomCheckTimeout.as_url())
+                .with_rules(
+                    GameRules::random_players_rules().with_strike_timeout(MIN_STRIKE_TIMEOUT),
+                )
+                .with_server_msg_callback(move |msg| {
+                    if matches!(msg, ServerMessage::RequestFire { .. }) && !did_skip_one {
+                        *msg = ServerMessage::OpponentReplacedByBot;
+                        did_skip_one = true;
+                    }
+                })
+                .run_client()
+                .await
+                .unwrap();
+
+            assert!(matches!(res, ClientEndResult::Finished { .. }));
+
+            assert!(time() - start >= MIN_STRIKE_TIMEOUT);
+        })
+        .await;
+}

rust/sea_battle_backend/src/test/mod.rs

@@ -10,6 +10,7 @@ enum TestPort {
     RandomBotInvalidBoatsLayoutLenOfABoat,
     RandomBotFullGameMultipleRematch,
     RandomBotNoReplayOnHit,
+    RandomCheckTimeout,
     LinearBotFullGame,
     LinearBotNoReplayOnHit,
     IntermediateBotFullGame,

rust/sea_battle_backend/src/test/play_utils.rs

@@ -1,7 +1,7 @@
 use crate::human_player_ws::ServerMessage;
 
 /// Make sure player can not replay after successful hit
-pub fn check_no_replay_on_hit(msg: &ServerMessage) {
+pub fn check_no_replay_on_hit(msg: &mut ServerMessage) {
     if let ServerMessage::OpponentMustFire { status } | ServerMessage::RequestFire { status } = msg
     {
         let diff =

rust/sea_battle_backend/src/utils/mod.rs

@@ -1,12 +1,4 @@
-use std::error::Error;
-use std::fmt::Display;
-use std::io::ErrorKind;
-
 pub mod network_utils;
+pub mod res_utils;
 pub mod string_utils;
-
-pub type Res<E = ()> = Result<E, Box<dyn Error>>;
-
-pub fn boxed_error<D: Display>(msg: D) -> Box<dyn Error> {
-    Box::new(std::io::Error::new(ErrorKind::Other, msg.to_string()))
-}
+pub mod time_utils;

rust/sea_battle_backend/src/utils/res_utils.rs

@@ -0,0 +1,9 @@
+use std::error::Error;
+use std::fmt::Display;
+use std::io::ErrorKind;
+
+pub type Res<E = ()> = Result<E, Box<dyn Error>>;
+
+pub fn boxed_error<D: Display>(msg: D) -> Box<dyn Error> {
+    Box::new(std::io::Error::new(ErrorKind::Other, msg.to_string()))
+}

rust/sea_battle_backend/src/utils/time_utils.rs

@@ -0,0 +1,9 @@
+use std::time::{SystemTime, UNIX_EPOCH};
+
+/// Get the current time since epoch
+pub fn time() -> u64 {
+    SystemTime::now()
+        .duration_since(UNIX_EPOCH)
+        .unwrap()
+        .as_secs()
+}

rust/sea_battle_cli_player/Cargo.toml

@@ -1,12 +1,18 @@
 [package]
-name = "cli_player"
+name = "sea_battle_cli_player"
 version = "0.1.0"
 edition = "2021"
+license = "GPL-2.0-or-later"
+description = "A Sea Battle game shell client"
+repository = "https://gitea.communiquons.org/pierre/SeaBattle"
+readme = "README.md"
+authors = ["Pierre Hubert <pierre.git@communiquons.org>"]
+categories = [ "games" ]
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-sea_battle_backend = { path = "../sea_battle_backend" }
+sea_battle_backend = { path = "../sea_battle_backend", version = "0.1.0" }
 clap = { version = "4.0.15", features = ["derive"] }
 log = "0.4.17"
 env_logger = "0.9.0"
@@ -24,4 +30,4 @@ futures = "0.3.23"
 serde_json = "1.0.85"
 hostname = "0.3.1"
 rustls = "0.20.6"
-hyper-rustls = { version = "0.23.0", features = ["rustls-native-certs"] }
+hyper-rustls = { version = "0.23.0", features = ["rustls-native-certs"] }

rust/sea_battle_cli_player/README.md

@@ -0,0 +1,41 @@
+# Sea battle cli player
+[![Build Status](https://drone.communiquons.org/api/badges/pierre/SeaBattle/status.svg)](https://drone.communiquons.org/pierre/SeaBattle)
+[![Crate](https://img.shields.io/crates/v/sea_battle_cli_player.svg)](https://crates.io/crates/sea_battle_cli_player)
+[![Documentation](https://docs.rs/sea_battle_cli_player/badge.svg)](https://docs.rs/sea_battle_cli_player/)
+
+![](img/SeaBattleCli.png)
+
+A sea battle shell client player for the [sea_battle_backend](https://crates.io/crates/sea_battle_backend) crate, based on the [tui](https://crates.io/crates/tui) library.
+
+## Available play modes
+* 🤖 Play against bot (this mode does not require any Internet connection, a local server is automatically spawn)
+* 🎲 Play against a random player
+* ➕ Create play invite (online). In this mode, the server returns an invitation code to give to the opponent
+* 🎫 Accept play invite (online)
+
+For the 🤖 bot and ➕ create invite modes, game rules can be customized before starting the game.
+
+## Installation
+You can install the backend using the following command:
+
+```bash
+cargo install sea_battle_cli_player
+```
+
+## Usage
+Simply launch using:
+```bash
+sea_battle_cli_player
+```
+
+
+## Offline LAN
+If you want to run a local server to play offline LAN games, the cli player can also act as the server:
+```bash
+RUST_LOG=info sea_battle_cli_player -s -l 0.0.0.0:7000
+```
+
+Then all the players must specify the address of this server to use it instead of the default official one:
+```bash
+sea_battle_cli_player -r http://IP_OF_TARGET:7000
+```

rust/sea_battle_cli_player/src/client.rs

@@ -5,8 +5,10 @@ use futures::{SinkExt, StreamExt};
 use hyper_rustls::ConfigBuilderExt;
 use sea_battle_backend::data::GameRules;
 use sea_battle_backend::human_player_ws::{ClientMessage, ServerMessage};
-use sea_battle_backend::server::{BotPlayQuery, PlayRandomQuery};
-use sea_battle_backend::utils::{boxed_error, Res};
+use sea_battle_backend::server::{
+    AcceptInviteQuery, BotPlayQuery, CreateInviteQuery, PlayRandomQuery,
+};
+use sea_battle_backend::utils::res_utils::{boxed_error, Res};
 use std::fmt::Display;
 use std::sync::mpsc::TryRecvError;
 use std::sync::{mpsc, Arc};
@@ -61,6 +63,38 @@ impl Client {
         .await
     }
 
+    /// Start a play by creating an invite
+    pub async fn start_create_invite<D: Display>(rules: &GameRules, player_name: D) -> Res<Self> {
+        Self::connect_url(
+            &cli_args().remote_server_uri,
+            &format!(
+                "/play/create_invite?{}",
+                serde_urlencoded::to_string(&CreateInviteQuery {
+                    rules: rules.clone(),
+                    player_name: player_name.to_string()
+                })
+                .unwrap()
+            ),
+        )
+        .await
+    }
+
+    /// Start a play by accepting an invite
+    pub async fn start_accept_invite<D: Display>(code: String, player_name: D) -> Res<Self> {
+        Self::connect_url(
+            &cli_args().remote_server_uri,
+            &format!(
+                "/play/accept_invite?{}",
+                serde_urlencoded::to_string(&AcceptInviteQuery {
+                    code,
+                    player_name: player_name.to_string()
+                })
+                .unwrap()
+            ),
+        )
+        .await
+    }
+
     /// Do connect to a server, returning
     async fn connect_url(server: &str, uri: &str) -> Res<Self> {
         let mut ws_url = server.replace("http", "ws");

rust/sea_battle_cli_player/src/main.rs

@@ -12,18 +12,22 @@ use env_logger::Env;
 use tui::backend::{Backend, CrosstermBackend};
 use tui::Terminal;
 
-use cli_player::cli_args::{cli_args, TestDevScreen};
-use cli_player::client::Client;
-use cli_player::server::run_server;
-use cli_player::ui_screens::configure_game_rules::GameRulesConfigurationScreen;
-use cli_player::ui_screens::game_screen::GameScreen;
-use cli_player::ui_screens::input_screen::InputScreen;
-use cli_player::ui_screens::popup_screen::PopupScreen;
-use cli_player::ui_screens::select_play_mode_screen::{SelectPlayModeResult, SelectPlayModeScreen};
-use cli_player::ui_screens::*;
-use sea_battle_backend::consts::{MAX_PLAYER_NAME_LENGTH, MIN_PLAYER_NAME_LENGTH};
+use sea_battle_backend::consts::{
+    INVITE_CODE_LENGTH, MAX_PLAYER_NAME_LENGTH, MIN_PLAYER_NAME_LENGTH,
+};
 use sea_battle_backend::data::GameRules;
-use sea_battle_backend::utils::Res;
+use sea_battle_backend::utils::res_utils::Res;
+use sea_battle_cli_player::cli_args::{cli_args, TestDevScreen};
+use sea_battle_cli_player::client::Client;
+use sea_battle_cli_player::server::run_server;
+use sea_battle_cli_player::ui_screens::configure_game_rules::GameRulesConfigurationScreen;
+use sea_battle_cli_player::ui_screens::game_screen::GameScreen;
+use sea_battle_cli_player::ui_screens::input_screen::InputScreen;
+use sea_battle_cli_player::ui_screens::popup_screen::PopupScreen;
+use sea_battle_cli_player::ui_screens::select_play_mode_screen::{
+    SelectPlayModeResult, SelectPlayModeScreen,
+};
+use sea_battle_cli_player::ui_screens::*;
 
 /// Test code screens
 async fn run_dev<B: Backend>(
@@ -72,8 +76,8 @@ async fn run_dev<B: Backend>(
     ))?
 }
 
-/// Ask the user to specify its username
-fn query_username<B: Backend>(terminal: &mut Terminal<B>) -> Res<String> {
+/// Ask the user to specify the name he should be identified with
+fn query_player_name<B: Backend>(terminal: &mut Terminal<B>) -> Res<String> {
     let mut hostname = hostname::get()?.to_string_lossy().to_string();
     if hostname.len() > MAX_PLAYER_NAME_LENGTH {
         hostname = hostname[0..MAX_PLAYER_NAME_LENGTH].to_string();
@@ -103,29 +107,49 @@ async fn run_app<B: Backend>(terminal: &mut Terminal<B>) -> Res {
         let choice = SelectPlayModeScreen::default().show(terminal)?;
 
         if let ScreenResult::Ok(c) = choice {
-            if c.need_user_name() && username.is_empty() {
-                username = query_username(terminal)?;
+            if c.need_player_name() && username.is_empty() {
+                username = query_player_name(terminal)?;
+            }
+
+            if c.need_custom_rules() {
+                rules = match GameRulesConfigurationScreen::new(rules.clone()).show(terminal)? {
+                    ScreenResult::Ok(r) => r,
+                    ScreenResult::Canceled => continue,
+                }
             }
         }
 
+        PopupScreen::new("🔌 Connecting...").show_once(terminal)?;
+
         let client = match choice {
             ScreenResult::Ok(SelectPlayModeResult::PlayRandom) => {
-                PopupScreen::new("Connecting...").show_once(terminal)?;
-
                 Client::start_random_play(&username).await?
             }
 
             // Play against bot
             ScreenResult::Ok(SelectPlayModeResult::PlayAgainstBot) => {
-                // First, ask for custom rules
-                rules = match GameRulesConfigurationScreen::new(rules.clone()).show(terminal)? {
-                    ScreenResult::Ok(r) => r,
-                    ScreenResult::Canceled => continue,
+                Client::start_bot_play(&rules).await?
+            }
+
+            // Create invite
+            ScreenResult::Ok(SelectPlayModeResult::CreateInvite) => {
+                Client::start_create_invite(&rules, &username).await?
+            }
+
+            // Join invite
+            ScreenResult::Ok(SelectPlayModeResult::AcceptInvite) => {
+                let code = match InputScreen::new("Invite code")
+                    .set_min_length(INVITE_CODE_LENGTH)
+                    .set_max_length(INVITE_CODE_LENGTH)
+                    .show(terminal)?
+                    .value()
+                {
+                    None => continue,
+                    Some(v) => v,
                 };
 
-                // Then connect to server
-                PopupScreen::new("Connecting...").show_once(terminal)?;
-                Client::start_bot_play(&rules).await?
+                PopupScreen::new("🔌 Connecting...").show_once(terminal)?;
+                Client::start_accept_invite(code, &username).await?
             }
 
             ScreenResult::Canceled | ScreenResult::Ok(SelectPlayModeResult::Exit) => return Ok(()),

rust/sea_battle_cli_player/src/ui_screens/configure_game_rules.rs

@@ -5,6 +5,9 @@ use std::time::{Duration, Instant};
 
 use crossterm::event;
 use crossterm::event::{Event, KeyCode};
+use sea_battle_backend::consts::{
+    MAX_BOATS_NUMBER, MAX_MAP_HEIGHT, MAX_MAP_WIDTH, MAX_STRIKE_TIMEOUT,
+};
 use tui::backend::Backend;
 use tui::layout::{Constraint, Direction, Layout, Margin};
 use tui::style::{Color, Style};
@@ -14,6 +17,7 @@ use tui::{Frame, Terminal};
 use sea_battle_backend::data::GameRules;
 
 use crate::constants::{HIGHLIGHT_COLOR, TICK_RATE};
+use crate::ui_screens::popup_screen::show_screen_too_small_popup;
 use crate::ui_screens::select_bot_type_screen::SelectBotTypeScreen;
 use crate::ui_screens::utils::centered_rect_size;
 use crate::ui_screens::ScreenResult;
@@ -26,6 +30,7 @@ enum EditingField {
     MapWidth = 0,
     MapHeight,
     BoatsList,
+    StrikeTimeout,
     BoatsCanTouch,
     PlayerContinueOnHit,
     BotType,
@@ -58,7 +63,7 @@ impl GameRulesConfigurationScreen {
                 .checked_sub(last_tick.elapsed())
                 .unwrap_or_else(|| Duration::from_secs(0));
 
-            if crossterm::event::poll(timeout)? {
+            if event::poll(timeout)? {
                 let mut cursor_pos = self.curr_field as i32;
 
                 if let Event::Key(key) = event::read()? {
@@ -114,24 +119,46 @@ impl GameRulesConfigurationScreen {
                             {
                                 self.rules.remove_last_boat();
                             }
+
+                            if self.curr_field == EditingField::StrikeTimeout {
+                                match self.rules.strike_timeout.unwrap_or(0) / 10 {
+                                    0 => self.rules.strike_timeout = None,
+                                    v => self.rules.strike_timeout = Some(v),
+                                }
+                            }
                         }
 
                         KeyCode::Char(c) if ('0'..='9').contains(&c) => {
                             let val = c.to_string().parse::<usize>().unwrap_or_default();
 
-                            if self.curr_field == EditingField::MapWidth {
+                            if self.curr_field == EditingField::MapWidth
+                                && self.rules.map_width <= MAX_MAP_WIDTH
+                            {
                                 self.rules.map_width *= 10;
                                 self.rules.map_width += val;
                             }
 
-                            if self.curr_field == EditingField::MapHeight {
+                            if self.curr_field == EditingField::MapHeight
+                                && self.rules.map_height <= MAX_MAP_HEIGHT
+                            {
                                 self.rules.map_height *= 10;
                                 self.rules.map_height += val;
                             }
 
-                            if self.curr_field == EditingField::BoatsList {
+                            if self.curr_field == EditingField::BoatsList
+                                && self.rules.boats_list().len() < MAX_BOATS_NUMBER
+                            {
                                 self.rules.add_boat(val);
                             }
+
+                            if self.curr_field == EditingField::StrikeTimeout {
+                                let mut timeout = self.rules.strike_timeout.unwrap_or(0);
+                                if timeout <= MAX_STRIKE_TIMEOUT {
+                                    timeout *= 10;
+                                    timeout += val as u64;
+                                    self.rules.strike_timeout = Some(timeout);
+                                }
+                            }
                         }
 
                         _ => {}
@@ -153,19 +180,29 @@ impl GameRulesConfigurationScreen {
     }
 
     fn ui<B: Backend>(&mut self, f: &mut Frame<B>) {
-        let area = centered_rect_size(50, 20, &f.size());
+        let (w, h) = (50, 23);
 
-        let block = Block::default().title("Game rules").borders(Borders::ALL);
+        if f.size().width < w || f.size().height < h {
+            show_screen_too_small_popup(f);
+            return;
+        }
+
+        let area = centered_rect_size(w, h, &f.size());
+
+        let block = Block::default()
+            .title("📓 Game rules")
+            .borders(Borders::ALL);
         f.render_widget(block, area);
 
         let chunks = Layout::default()
             .direction(Direction::Vertical)
             .constraints([
-                Constraint::Length(3),
-                Constraint::Length(3),
-                Constraint::Length(3),
-                Constraint::Length(1),
-                Constraint::Length(1),
+                Constraint::Length(3), // Map width
+                Constraint::Length(3), // Map height
+                Constraint::Length(3), // Boats list
+                Constraint::Length(3), // Strike timeout
+                Constraint::Length(1), // Boats can touch
+                Constraint::Length(1), // Player continue on hit
                 Constraint::Length(3), // Bot type
                 Constraint::Length(1), // Margin
                 Constraint::Length(1), // Buttons
@@ -203,6 +240,13 @@ impl GameRulesConfigurationScreen {
         );
         f.render_widget(editor, chunks[EditingField::BoatsList as usize]);
 
+        let editor = TextEditorWidget::new(
+            "Strike timeout (0 to disable)",
+            &self.rules.strike_timeout.unwrap_or(0).to_string(),
+            self.curr_field == EditingField::StrikeTimeout,
+        );
+        f.render_widget(editor, chunks[EditingField::StrikeTimeout as usize]);
+
         let editor = CheckboxWidget::new(
             "Boats can touch",
             self.rules.boats_can_touch,

rust/sea_battle_cli_player/src/ui_screens/game_screen.rs

@@ -12,14 +12,17 @@ use tui::{Frame, Terminal};
 
 use sea_battle_backend::data::{Coordinates, CurrentGameMapStatus, CurrentGameStatus};
 use sea_battle_backend::human_player_ws::{ClientMessage, ServerMessage};
-use sea_battle_backend::utils::Res;
+use sea_battle_backend::utils::res_utils::Res;
+use sea_battle_backend::utils::time_utils::time;
 
 use crate::client::Client;
 use crate::constants::*;
 use crate::ui_screens::confirm_dialog_screen::confirm;
-use crate::ui_screens::popup_screen::PopupScreen;
+use crate::ui_screens::popup_screen::{show_screen_too_small_popup, PopupScreen};
 use crate::ui_screens::set_boats_layout_screen::SetBoatsLayoutScreen;
-use crate::ui_screens::utils::{centered_rect_size, centered_text};
+use crate::ui_screens::utils::{
+    centered_rect_size, centered_rect_size_horizontally, centered_text,
+};
 use crate::ui_screens::ScreenResult;
 use crate::ui_widgets::button_widget::ButtonWidget;
 use crate::ui_widgets::game_map_widget::{ColoredCells, GameMapWidget};
@@ -52,21 +55,21 @@ impl GameStatus {
 
     pub fn status_text(&self) -> &str {
         match self {
-            GameStatus::Connecting => "Connecting...",
-            GameStatus::WaitingForAnotherPlayer => "Waiting for another player...",
-            GameStatus::OpponentConnected => "Opponent connected!",
-            GameStatus::WaitingForOpponentBoatsConfig => "Waiting for ### boats configuration",
-            GameStatus::OpponentReady => "### is ready!",
-            GameStatus::Starting => "Game is starting...",
-            GameStatus::MustFire => "You must fire!",
-            GameStatus::OpponentMustFire => "### must fire!",
-            GameStatus::WonGame => "You won the game!",
-            GameStatus::LostGame => "### won the game. You loose.",
-            GameStatus::RematchRequestedByOpponent => "Rematch requested by ###",
-            GameStatus::RematchRequestedByPlayer => "Rematch requested by you",
-            GameStatus::RematchAccepted => "Rematch accepted!",
-            GameStatus::RematchRejected => "Rematch rejected!",
-            GameStatus::OpponentLeftGame => "Opponent left game!",
+            GameStatus::Connecting => "🔌 Connecting...",
+            GameStatus::WaitingForAnotherPlayer => "🕑 Waiting for another player...",
+            GameStatus::OpponentConnected => "✅ Opponent connected!",
+            GameStatus::WaitingForOpponentBoatsConfig => "🕑 Waiting for ### boats configuration",
+            GameStatus::OpponentReady => "✅ ### is ready!",
+            GameStatus::Starting => "🕑 Game is starting...",
+            GameStatus::MustFire => "🚨 You must fire!",
+            GameStatus::OpponentMustFire => "💣 ### must fire!",
+            GameStatus::WonGame => "🎉 You win the game!",
+            GameStatus::LostGame => "😿 ### wins the game. You loose.",
+            GameStatus::RematchRequestedByOpponent => "❓ Rematch requested by ###",
+            GameStatus::RematchRequestedByPlayer => "❓ Rematch requested by you",
+            GameStatus::RematchAccepted => "✅ Rematch accepted!",
+            GameStatus::RematchRejected => "❌ Rematch rejected!",
+            GameStatus::OpponentLeftGame => "⛔ Opponent left game!",
         }
     }
 }
@@ -82,10 +85,10 @@ enum Buttons {
 impl Buttons {
     pub fn text(&self) -> &str {
         match self {
-            Buttons::RequestRematch => "Request rematch",
-            Buttons::AcceptRematch => "Accept rematch",
-            Buttons::RejectRematch => "Reject rematch",
-            Buttons::QuitGame => "Quit game",
+            Buttons::RequestRematch => "❓ Request rematch",
+            Buttons::AcceptRematch => "✅ Accept rematch",
+            Buttons::RejectRematch => "❌ Reject rematch",
+            Buttons::QuitGame => "❌ Quit game",
         }
     }
 }
@@ -95,6 +98,7 @@ pub struct GameScreen {
     invite_code: Option<String>,
     status: GameStatus,
     opponent_name: Option<String>,
+    game_last_update: u64,
     game: CurrentGameStatus,
     curr_shoot_position: Coordinates,
     last_opponent_fire_position: Coordinates,
@@ -108,6 +112,7 @@ impl GameScreen {
             invite_code: None,
             status: GameStatus::Connecting,
             opponent_name: None,
+            game_last_update: 0,
             game: Default::default(),
             curr_shoot_position: Coordinates::new(0, 0),
             last_opponent_fire_position: Coordinates::invalid(),
@@ -133,7 +138,7 @@ impl GameScreen {
                 .unwrap_or_else(|| Duration::from_secs(0));
 
             // Handle terminal events
-            if crossterm::event::poll(timeout)? {
+            if event::poll(timeout)? {
                 let event = event::read()?;
 
                 // Keyboard event
@@ -238,7 +243,7 @@ impl GameScreen {
                     }
 
                     ServerMessage::InvalidInviteCode => {
-                        PopupScreen::new("Invalid invite code!").show(terminal)?;
+                        PopupScreen::new("❌ Invalid invite code!").show(terminal)?;
                         return Ok(ScreenResult::Ok(()));
                     }
 
@@ -288,11 +293,13 @@ impl GameScreen {
 
                     ServerMessage::OpponentMustFire { status } => {
                         self.status = GameStatus::OpponentMustFire;
+                        self.game_last_update = time();
                         self.game = status;
                     }
 
                     ServerMessage::RequestFire { status } => {
                         self.status = GameStatus::MustFire;
+                        self.game_last_update = time();
                         self.game = status;
                     }
 
@@ -303,11 +310,13 @@ impl GameScreen {
                     }
 
                     ServerMessage::LostGame { status } => {
+                        self.game_last_update = time();
                         self.game = status;
                         self.status = GameStatus::LostGame;
                     }
 
                     ServerMessage::WonGame { status } => {
+                        self.game_last_update = time();
                         self.game = status;
                         self.status = GameStatus::WonGame;
                     }
@@ -357,6 +366,7 @@ impl GameScreen {
                 buttons.push(Buttons::RejectRematch);
             } else if self.status != GameStatus::OpponentLeftGame
                 && self.status != GameStatus::RematchRejected
+                && self.status != GameStatus::RematchRequestedByPlayer
             {
                 buttons.push(Buttons::RequestRematch);
             }
@@ -468,7 +478,7 @@ impl GameScreen {
         if !self.status.can_show_game_maps() {
             if self.status == GameStatus::WaitingForAnotherPlayer {
                 if let Some(code) = &self.invite_code {
-                    status_text.push_str(&format!("\n Invite code: {}", code));
+                    status_text.push_str(&format!("\n\n🎫 Invite code: {}", code));
                 }
             }
 
@@ -476,6 +486,17 @@ impl GameScreen {
             return HashMap::default();
         }
 
+        // Add timeout (if required)
+        let mut timeout_str = String::new();
+        if self.status == GameStatus::MustFire || self.status == GameStatus::OpponentMustFire {
+            if let Some(remaining) = self.game.remaining_time_for_strike {
+                let timeout = self.game_last_update + remaining;
+                if time() < timeout {
+                    timeout_str = format!(" {} seconds left", timeout - time());
+                }
+            }
+        }
+
         // Draw main ui (default play UI)
         let player_map = self
             .player_map(&self.game.your_map, false)
@@ -519,19 +540,22 @@ impl GameScreen {
 
         let buttons_width = buttons.iter().fold(0, |a, b| a + b.estimated_size().0 + 4);
 
-        let max_width = max(maps_width, status_text.len() as u16).max(buttons_width);
-        let total_height = 3 + maps_height + 3;
+        let max_width = max(maps_width, status_text.len() as u16)
+            .max(buttons_width)
+            .max(timeout_str.len() as u16);
+        let total_height = 3 + 1 + maps_height + 3;
 
         // Check if frame is too small
         if max_width > f.size().width || total_height > f.size().height {
-            PopupScreen::new("Screen too small!").show_in_frame(f);
+            show_screen_too_small_popup(f);
             return HashMap::default();
         }
 
         let chunks = Layout::default()
             .direction(Direction::Vertical)
             .constraints([
-                Constraint::Length(3),
+                Constraint::Length(2),
+                Constraint::Length(2),
                 Constraint::Length(maps_height),
                 Constraint::Length(3),
             ])
@@ -541,25 +565,31 @@ impl GameScreen {
         let paragraph = Paragraph::new(status_text.as_str());
         f.render_widget(paragraph, centered_text(&status_text, &chunks[0]));
 
+        // Render timeout
+        let paragraph = Paragraph::new(timeout_str.as_str());
+        f.render_widget(paragraph, centered_text(&timeout_str, &chunks[1]));
+
         // Render maps
         if show_both_maps {
             let maps_chunks = Layout::default()
                 .direction(Direction::Horizontal)
-                .constraints([
-                    Constraint::Length(player_map_size.0),
-                    Constraint::Length(3),
-                    Constraint::Length(opponent_map_size.0),
-                ])
-                .split(chunks[1]);
+                .constraints([Constraint::Percentage(50), Constraint::Percentage(50)])
+                .split(chunks[2]);
 
-            f.render_widget(player_map, maps_chunks[0]);
-            f.render_widget(opponent_map, maps_chunks[2]);
+            f.render_widget(
+                player_map,
+                centered_rect_size_horizontally(player_map_size.0, &maps_chunks[0]),
+            );
+            f.render_widget(
+                opponent_map,
+                centered_rect_size_horizontally(opponent_map_size.0, &maps_chunks[1]),
+            );
         } else {
             // Render a single map
             if self.can_fire() {
-                f.render_widget(opponent_map, chunks[1]);
+                f.render_widget(opponent_map, chunks[2]);
             } else {
-                f.render_widget(player_map, chunks[1]);
+                f.render_widget(player_map, chunks[2]);
                 drop(opponent_map);
             }
         }
@@ -573,7 +603,7 @@ impl GameScreen {
                         .map(|_| Constraint::Percentage(100 / buttons.len() as u16))
                         .collect::<Vec<_>>(),
                 )
-                .split(chunks[2]);
+                .split(chunks[3]);
 
             for (idx, b) in buttons.into_iter().enumerate() {
                 let target = centered_rect_size(

rust/sea_battle_cli_player/src/ui_screens/input_screen.rs

@@ -125,7 +125,7 @@ impl<'a> InputScreen<'a> {
 
     fn ui<B: Backend>(&mut self, f: &mut Frame<B>) {
         let area = centered_rect_size(
-            (self.msg.len() + 4).max(self.max_len + 4) as u16,
+            (self.msg.len() + 4).max(self.max_len + 4).max(25) as u16,
             7,
             &f.size(),
         );

rust/sea_battle_cli_player/src/ui_screens/popup_screen.rs

@@ -14,6 +14,12 @@ use crate::ui_screens::utils::centered_rect_size;
 use crate::ui_screens::ScreenResult;
 use crate::ui_widgets::button_widget::ButtonWidget;
 
+/// Convenience function to inform user that his terminal window is too small to display the current
+/// screen
+pub fn show_screen_too_small_popup<B: Backend>(f: &mut Frame<B>) {
+    PopupScreen::new("🖵  Screen too small!").show_in_frame(f)
+}
+
 pub struct PopupScreen<'a> {
     title: &'a str,
     msg: &'a str,

rust/sea_battle_cli_player/src/ui_screens/select_play_mode_screen.rs

@@ -17,14 +17,22 @@ pub enum SelectPlayModeResult {
     #[default]
     PlayAgainstBot,
     PlayRandom,
+    CreateInvite,
+    AcceptInvite,
     Exit,
 }
 
 impl SelectPlayModeResult {
     /// Specify whether a selected play mode requires a user name or not
-    pub fn need_user_name(&self) -> bool {
+    pub fn need_player_name(&self) -> bool {
         self != &SelectPlayModeResult::PlayAgainstBot && self != &SelectPlayModeResult::Exit
     }
+
+    /// Specify whether a selected play mode requires a the user to specify its own game rules or
+    /// not
+    pub fn need_custom_rules(&self) -> bool {
+        self == &SelectPlayModeResult::PlayAgainstBot || self == &SelectPlayModeResult::CreateInvite
+    }
 }
 
 #[derive(Debug, Clone)]
@@ -33,17 +41,25 @@ struct PlayModeDescription {
     value: SelectPlayModeResult,
 }
 
-const AVAILABLE_PLAY_MODES: [PlayModeDescription; 3] = [
+const AVAILABLE_PLAY_MODES: [PlayModeDescription; 5] = [
     PlayModeDescription {
-        name: "Play against bot (offline)",
+        name: "🤖 Play against bot (offline)",
         value: SelectPlayModeResult::PlayAgainstBot,
     },
     PlayModeDescription {
-        name: "Play against random player (online)",
+        name: "🎲 Play against random player (online)",
         value: SelectPlayModeResult::PlayRandom,
     },
     PlayModeDescription {
-        name: "Exit app",
+        name: "➕ Create play invite (online)",
+        value: SelectPlayModeResult::CreateInvite,
+    },
+    PlayModeDescription {
+        name: "🎫 Accept play invite (online)",
+        value: SelectPlayModeResult::AcceptInvite,
+    },
+    PlayModeDescription {
+        name: "❌ Exit app",
         value: SelectPlayModeResult::Exit,
     },
 ];
@@ -92,7 +108,7 @@ impl SelectPlayModeScreen {
     }
 
     fn ui<B: Backend>(&mut self, f: &mut Frame<B>) {
-        let area = centered_rect_size(50, 5, &f.size());
+        let area = centered_rect_size(50, 2 + AVAILABLE_PLAY_MODES.len() as u16, &f.size());
 
         // Create a List from all list items and highlight the currently selected one
         let items = AVAILABLE_PLAY_MODES

rust/sea_battle_cli_player/src/ui_screens/set_boats_layout_screen.rs

@@ -14,7 +14,7 @@ use sea_battle_backend::data::*;
 
 use crate::constants::*;
 use crate::ui_screens::confirm_dialog_screen::confirm;
-use crate::ui_screens::popup_screen::PopupScreen;
+use crate::ui_screens::popup_screen::show_screen_too_small_popup;
 use crate::ui_screens::utils::{centered_rect_size, centered_text};
 use crate::ui_screens::ScreenResult;
 use crate::ui_widgets::game_map_widget::{ColoredCells, GameMapWidget};
@@ -229,8 +229,9 @@ impl<'a> SetBoatsLayoutScreen<'a> {
 
         let (w, h) = game_map_widget.estimated_size();
 
-        if f.size().width < w || f.size().height + 3 < h {
-            PopupScreen::new("Screen too small!").show_in_frame(f);
+        if f.size().width < w || f.size().height < h + 3 {
+            // +3 = for errors
+            show_screen_too_small_popup(f);
             drop(game_map_widget);
             return coordinates_mapper;
         }

rust/sea_battle_cli_player/src/ui_screens/utils.rs

@@ -46,6 +46,25 @@ pub fn centered_rect_size(width: u16, height: u16, parent: &Rect) -> Rect {
     }
 }
 
+/// helper function to create a centered rect using up certain container size, only horizontally
+pub fn centered_rect_size_horizontally(width: u16, parent: &Rect) -> Rect {
+    if parent.width < width {
+        return Rect {
+            x: parent.x,
+            y: parent.y,
+            width: parent.width,
+            height: parent.height,
+        };
+    }
+
+    Rect {
+        x: parent.x + (parent.width - width) / 2,
+        y: parent.y,
+        width,
+        height: parent.height,
+    }
+}
+
 /// Get coordinates to render centered text
 pub fn centered_text(text: &str, container: &Rect) -> Rect {
     if text.len() > container.width as usize {

rust/sea_battle_cli_player/src/ui_widgets/game_map_widget.rs

@@ -77,8 +77,8 @@ impl<'a> GameMapWidget<'a> {
     }
 
     pub fn grid_size(&self) -> (u16, u16) {
-        let w = self.rules.map_width as u16 * 2 + 1;
-        let h = self.rules.map_height as u16 * 2 + 1;
+        let w = (self.rules.map_width as u16 * 2) + 2;
+        let h = (self.rules.map_height as u16 * 2) + 2;
 
         (w, h)
     }