Bump to version 0.1.0 -> 0.2.0

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

@@ -421,9 +421,9 @@ dependencies = [
 
 [[package]]
 name = "clap"
-version = "4.0.15"
+version = "4.0.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6bf8832993da70a4c6d13c581f4463c2bdda27b9bf1c5498dc4365543abe6d6f"
+checksum = "2ef582e2c00a63a0c0aa1fb4a4870781c4f5729f51196d3537fa7c1c1992eaa3"
 dependencies = [
  "atty",
  "bitflags",
@@ -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"
@@ -965,6 +940,7 @@ dependencies = [
  "futures-channel",
  "futures-core",
  "futures-util",
+ "h2",
  "http",
  "http-body",
  "httparse",
@@ -1044,6 +1020,12 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "ipnet"
+version = "2.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "879d54834c8c76457ef4293a689b2a8c59b076067ad77b15efafbb05f92a592b"
+
 [[package]]
 name = "itoa"
 version = "1.0.4"
@@ -1446,6 +1428,45 @@ version = "0.6.27"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a3f87b73ce11b1619a3c6332f45341e0047173771e8b8b73f87bfeefb7b56244"
 
+[[package]]
+name = "reqwest"
+version = "0.11.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "431949c384f4e2ae07605ccaa56d1d9d2ecdb5cadd4f9577ccfab29f2e5149fc"
+dependencies = [
+ "base64",
+ "bytes",
+ "encoding_rs",
+ "futures-core",
+ "futures-util",
+ "h2",
+ "http",
+ "http-body",
+ "hyper",
+ "hyper-rustls",
+ "ipnet",
+ "js-sys",
+ "log",
+ "mime",
+ "once_cell",
+ "percent-encoding",
+ "pin-project-lite",
+ "rustls",
+ "rustls-pemfile",
+ "serde",
+ "serde_json",
+ "serde_urlencoded",
+ "tokio",
+ "tokio-rustls",
+ "tower-service",
+ "url",
+ "wasm-bindgen",
+ "wasm-bindgen-futures",
+ "web-sys",
+ "webpki-roots",
+ "winreg",
+]
+
 [[package]]
 name = "ring"
 version = "0.16.20"
@@ -1543,7 +1564,7 @@ dependencies = [
 
 [[package]]
 name = "sea_battle_backend"
-version = "0.1.0"
+version = "0.2.0"
 dependencies = [
  "actix",
  "actix-cors",
@@ -1555,6 +1576,7 @@ dependencies = [
  "futures",
  "log",
  "rand",
+ "semver",
  "serde",
  "serde_json",
  "serde_urlencoded",
@@ -1564,6 +1586,32 @@ dependencies = [
  "uuid",
 ]
 
+[[package]]
+name = "sea_battle_cli_player"
+version = "0.2.0"
+dependencies = [
+ "clap",
+ "crossterm",
+ "env_logger",
+ "futures",
+ "hostname",
+ "hyper-rustls",
+ "lazy_static",
+ "log",
+ "num",
+ "num-derive",
+ "num-traits",
+ "reqwest",
+ "rustls",
+ "sea_battle_backend",
+ "serde_json",
+ "serde_urlencoded",
+ "textwrap",
+ "tokio",
+ "tokio-tungstenite",
+ "tui",
+]
+
 [[package]]
 name = "security-framework"
 version = "2.7.0"
@@ -2111,6 +2159,18 @@ dependencies = [
  "wasm-bindgen-shared",
 ]
 
+[[package]]
+name = "wasm-bindgen-futures"
+version = "0.4.33"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "23639446165ca5a5de86ae1d8896b737ae80319560fbaa4c2887b7da6e7ebd7d"
+dependencies = [
+ "cfg-if",
+ "js-sys",
+ "wasm-bindgen",
+ "web-sys",
+]
+
 [[package]]
 name = "wasm-bindgen-macro"
 version = "0.2.83"
@@ -2160,6 +2220,15 @@ dependencies = [
  "untrusted",
 ]
 
+[[package]]
+name = "webpki-roots"
+version = "0.22.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "368bfe657969fb01238bb756d351dcade285e0f6fcbd36dcb23359a5169975be"
+dependencies = [
+ "webpki",
+]
+
 [[package]]
 name = "winapi"
 version = "0.3.9"
@@ -2234,6 +2303,15 @@ version = "0.36.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c811ca4a8c853ef420abd8592ba53ddbbac90410fab6903b3e79972a631f7680"
 
+[[package]]
+name = "winreg"
+version = "0.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "80d0f4e272c85def139476380b12f9ac60926689dd2e01d4923222f40580869d"
+dependencies = [
+ "winapi",
+]
+
 [[package]]
 name = "zstd"
 version = "0.11.2+zstd.1.5.2"

rust/Cargo.toml

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

rust/sea_battle_backend/Cargo.toml

@@ -1,12 +1,18 @@
 [package]
 name = "sea_battle_backend"
-version = "0.1.0"
+version = "0.2.0"
 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
 
 [dependencies]
-clap = { version = "4.0.15", features = ["derive"] }
+clap = { version = "4.0.16", features = ["derive"] }
 log = "0.4.17"
 env_logger = "0.9.0"
 serde = { version = "1.0.145", features = ["derive"] }
@@ -20,6 +26,7 @@ uuid = { version = "1.1.2", features = ["v4"] }
 rand = "0.8.5"
 serde_with = "2.0.1"
 tokio = { version = "1", features = ["full"] }
+semver = "1.0.14"
 
 [dev-dependencies]
 #reqwest = { version = "0.11.11", default-features = false, features = ["json", "rustls-tls"] }

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/args.rs

@@ -12,3 +12,14 @@ pub struct Args {
     #[clap(short, long, value_parser)]
     pub cors: Option<String>,
 }
+
+#[cfg(test)]
+mod test {
+    use crate::args::Args;
+
+    #[test]
+    fn verify_cli() {
+        use clap::CommandFactory;
+        Args::command().debug_assert()
+    }
+}

rust/sea_battle_backend/src/consts.rs

@@ -1,5 +1,8 @@
 //! # Project constants
 
+pub const MIN_REQUIRED_VERSION: &str = "0.1.0";
+pub const CURRENT_VERSION: &str = env!("CARGO_PKG_VERSION");
+
 pub const MIN_BOATS_NUMBER: usize = 1;
 pub const MAX_BOATS_NUMBER: usize = 10;
 

rust/sea_battle_backend/src/data/boats_layout.rs

@@ -361,7 +361,7 @@ impl BoatsLayout {
 mod test {
     use crate::data::boats_layout::{BoatDirection, BoatPosition, BoatsLayout, Coordinates};
     use crate::data::game_map::GameMap;
-    use crate::data::{BotType, GameRules, PlayConfiguration, PrintableMap};
+    use crate::data::*;
 
     #[test]
     fn dist_coordinates_eq() {
@@ -488,9 +488,7 @@ mod test {
             map_height: 5,
             boats_str: "1,1".to_string(),
             boats_can_touch: false,
-            player_continue_on_hit: false,
-            strike_timeout: None,
-            bot_type: BotType::Random,
+            ..Default::default()
         };
 
         let mut boats = BoatsLayout(vec![

rust/sea_battle_backend/src/data/mod.rs

@@ -4,6 +4,7 @@ pub use game_map::*;
 pub use game_rules::*;
 pub use play_config::*;
 pub use printable_map::*;
+pub use version::*;
 
 mod boats_layout;
 mod current_game_status;
@@ -11,3 +12,4 @@ mod game_map;
 mod game_rules;
 mod play_config;
 mod printable_map;
+mod version;

rust/sea_battle_backend/src/data/version.rs

@@ -0,0 +1,32 @@
+//! # Version Info
+//!
+//! Contains server version requirements information
+
+use crate::consts;
+use crate::utils::res_utils::Res;
+use semver::Version;
+
+#[derive(serde::Serialize, serde::Deserialize)]
+pub struct VersionInfo {
+    current: String,
+    min_required: String,
+}
+
+impl VersionInfo {
+    pub fn load_static() -> Self {
+        Self {
+            current: consts::CURRENT_VERSION.to_string(),
+            min_required: consts::MIN_REQUIRED_VERSION.to_string(),
+        }
+    }
+
+    /// Check if builtin version is compatible with a remote version or not
+    pub fn is_compatible_with_static_version(&self) -> Res<bool> {
+        let static_version = Self::load_static();
+
+        let local_current = Version::parse(&static_version.current)?;
+        let min_required = Version::parse(&self.min_required)?;
+
+        Ok(min_required <= local_current)
+    }
+}

rust/sea_battle_backend/src/server.rs

@@ -4,7 +4,7 @@ use actix_web::{web, App, HttpRequest, HttpResponse, HttpServer, Responder};
 use actix_web_actors::ws;
 
 use crate::args::Args;
-use crate::data::{GameRules, PlayConfiguration};
+use crate::data::{BoatsLayout, GameRules, PlayConfiguration, VersionInfo};
 use crate::dispatcher_actor::DispatcherActor;
 use crate::human_player_ws::{HumanPlayerWS, StartMode};
 
@@ -18,11 +18,45 @@ async fn not_found() -> impl Responder {
     HttpResponse::NotFound().json("You missed your strike lol")
 }
 
-/// Get bot configuration
+/// Get version information
+async fn version_information() -> impl Responder {
+    HttpResponse::Ok().json(VersionInfo::load_static())
+}
+
+/// Get game configuration
 async fn game_configuration() -> impl Responder {
     HttpResponse::Ok().json(PlayConfiguration::default())
 }
 
+/// Get default game rules
+async fn default_game_rules() -> impl Responder {
+    HttpResponse::Ok().json(GameRules::random_players_rules())
+}
+
+/// Validate game rules
+async fn validate_game_rules(rules: web::Json<GameRules>) -> impl Responder {
+    HttpResponse::Ok().json(rules.get_errors())
+}
+
+/// Generate random boats layout
+async fn gen_boats_layout(rules: web::Json<GameRules>) -> impl Responder {
+    let errors = rules.get_errors();
+    if !errors.is_empty() {
+        return HttpResponse::BadRequest().json(errors);
+    }
+    match BoatsLayout::gen_random_for_rules(&rules) {
+        Ok(l) => HttpResponse::Ok().json(l),
+        Err(e) => {
+            log::error!(
+                "Failed to generate boats layout for valid game rules: {} ! / Rules: {:?}",
+                e,
+                rules
+            );
+            HttpResponse::InternalServerError().json("Failed to generate random layout!")
+        }
+    }
+}
+
 #[derive(serde::Serialize, serde::Deserialize, Eq, PartialEq, Debug)]
 pub struct BotPlayQuery {
     #[serde(flatten)]
@@ -130,6 +164,7 @@ async fn start_random(
     log::info!("New random play");
     resp
 }
+
 pub async fn start_server(args: Args) -> std::io::Result<()> {
     log::info!("Start to listen on {}", args.listen_address);
 
@@ -148,7 +183,11 @@ pub async fn start_server(args: Args) -> std::io::Result<()> {
         App::new()
             .app_data(web::Data::new(dispatcher_actor.clone()))
             .wrap(cors)
+            .route("/version", web::get().to(version_information))
             .route("/config", web::get().to(game_configuration))
+            .route("/game_rules/default", web::get().to(default_game_rules))
+            .route("/game_rules/validate", web::post().to(validate_game_rules))
+            .route("/generate_boats_layout", web::post().to(gen_boats_layout))
             .route("/play/bot", web::get().to(start_bot_play))
             .route("/play/create_invite", web::get().to(start_create_invite))
             .route("/play/accept_invite", web::get().to(start_accept_invite))

rust/sea_battle_cli_player/Cargo.toml

@@ -1,13 +1,19 @@
 [package]
-name = "cli_player"
-version = "0.1.0"
+name = "sea_battle_cli_player"
+version = "0.2.0"
 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" }
-clap = { version = "4.0.15", features = ["derive"] }
+sea_battle_backend = { path = "../sea_battle_backend", version = "0.2.0" }
+clap = { version = "4.0.16", features = ["derive"] }
 log = "0.4.17"
 env_logger = "0.9.0"
 tui = "0.19.0"
@@ -25,3 +31,4 @@ serde_json = "1.0.85"
 hostname = "0.3.1"
 rustls = "0.20.6"
 hyper-rustls = { version = "0.23.0", features = ["rustls-native-certs"] }
+reqwest = { version = "0.11", features = ["json", "rustls-tls"], default-features = false }

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/cli_args.rs

@@ -20,7 +20,7 @@ pub struct CliArgs {
         value_parser,
         default_value = "https://seabattleapi.communiquons.org"
     )]
-    pub remote_server_uri: String,
+    pub remote_server: String,
 
     /// Local server listen address
     #[clap(short, long, default_value = "127.0.0.1:5679")]
@@ -61,3 +61,14 @@ lazy_static::lazy_static! {
 pub fn cli_args() -> &'static CliArgs {
     &ARGS
 }
+
+#[cfg(test)]
+mod test {
+    use crate::cli_args::CliArgs;
+
+    #[test]
+    fn verify_cli() {
+        use clap::CommandFactory;
+        CliArgs::command().debug_assert()
+    }
+}

rust/sea_battle_cli_player/src/client.rs

@@ -3,10 +3,13 @@ use crate::server;
 use futures::stream::{SplitSink, SplitStream};
 use futures::{SinkExt, StreamExt};
 use hyper_rustls::ConfigBuilderExt;
-use sea_battle_backend::data::GameRules;
+use sea_battle_backend::data::*;
 use sea_battle_backend::human_player_ws::{ClientMessage, ServerMessage};
-use sea_battle_backend::server::{BotPlayQuery, PlayRandomQuery};
+use sea_battle_backend::server::{
+    AcceptInviteQuery, BotPlayQuery, CreateInviteQuery, PlayRandomQuery,
+};
 use sea_battle_backend::utils::res_utils::{boxed_error, Res};
+use std::error::Error;
 use std::fmt::Display;
 use std::sync::mpsc::TryRecvError;
 use std::sync::{mpsc, Arc};
@@ -16,6 +19,11 @@ use tokio_tungstenite::{MaybeTlsStream, WebSocketStream};
 
 type WsStream = WebSocketStream<MaybeTlsStream<TcpStream>>;
 
+pub enum GetRemoteVersionError {
+    ConnectionFailed,
+    Other(Box<dyn Error>),
+}
+
 /// Connection client
 ///
 /// This structure acts as a wrapper around websocket connection that handles automatically parsing
@@ -26,6 +34,24 @@ pub struct Client {
 }
 
 impl Client {
+    /// Get remote server version
+    pub async fn get_server_version() -> Result<VersionInfo, GetRemoteVersionError> {
+        let url = format!("{}/version", cli_args().remote_server);
+        log::debug!("Getting remote information from {} ...", url);
+
+        let res = match reqwest::get(url).await {
+            Ok(r) => r,
+            Err(e) if e.is_timeout() || e.is_connect() => {
+                return Err(GetRemoteVersionError::ConnectionFailed)
+            }
+            Err(e) => return Err(GetRemoteVersionError::Other(Box::new(e))),
+        };
+
+        res.json()
+            .await
+            .map_err(|e| GetRemoteVersionError::Other(Box::new(e)))
+    }
+
     /// Start to play against a bot
     ///
     /// When playing against a bot, local server is always used
@@ -49,7 +75,7 @@ impl Client {
     /// Start to play against a random player
     pub async fn start_random_play<D: Display>(player_name: D) -> Res<Self> {
         Self::connect_url(
-            &cli_args().remote_server_uri,
+            &cli_args().remote_server,
             &format!(
                 "/play/random?{}",
                 serde_urlencoded::to_string(&PlayRandomQuery {
@@ -61,6 +87,38 @@ 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,
+            &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,
+            &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/lib.rs

@@ -2,7 +2,7 @@ extern crate core;
 
 pub mod cli_args;
 pub mod client;
-pub mod constants;
+pub mod consts;
 pub mod server;
 pub mod ui_screens;
 pub mod ui_widgets;

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_utils::Res;
+use sea_battle_cli_player::cli_args::{cli_args, TestDevScreen};
+use sea_battle_cli_player::client::{Client, GetRemoteVersionError};
+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>(
@@ -31,10 +35,10 @@ async fn run_dev<B: Backend>(
     d: TestDevScreen,
 ) -> Result<(), Box<dyn Error>> {
     let res = match d {
-        TestDevScreen::Popup => popup_screen::PopupScreen::new("Welcome there!!")
+        TestDevScreen::Popup => PopupScreen::new("Welcome there!!")
             .show(terminal)?
             .as_string(),
-        TestDevScreen::Input => input_screen::InputScreen::new("What it your name ?")
+        TestDevScreen::Input => InputScreen::new("What it your name ?")
             .set_title("A custom title")
             .show(terminal)?
             .as_string(),
@@ -46,9 +50,9 @@ async fn run_dev<B: Backend>(
         TestDevScreen::SelectBotType => select_bot_type_screen::SelectBotTypeScreen::default()
             .show(terminal)?
             .as_string(),
-        TestDevScreen::SelectPlayMode => select_play_mode_screen::SelectPlayModeScreen::default()
-            .show(terminal)?
-            .as_string(),
+        TestDevScreen::SelectPlayMode => {
+            SelectPlayModeScreen::default().show(terminal)?.as_string()
+        }
         TestDevScreen::SetBoatsLayout => {
             let rules = GameRules {
                 boats_can_touch: true,
@@ -60,7 +64,7 @@ async fn run_dev<B: Backend>(
                 .as_string()
         }
         TestDevScreen::ConfigureGameRules => {
-            configure_game_rules::GameRulesConfigurationScreen::new(GameRules::default())
+            GameRulesConfigurationScreen::new(GameRules::default())
                 .show(terminal)?
                 .as_string()
         }
@@ -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();
@@ -95,44 +99,99 @@ async fn run_app<B: Backend>(terminal: &mut Terminal<B>) -> Res {
         return run_dev(terminal, d).await;
     }
 
+    let mut checked_online_compatibility = false;
+
     let mut rules = GameRules::default();
 
     let mut username = "".to_string();
 
     loop {
+        terminal.clear()?;
         let choice = SelectPlayModeScreen::default().show(terminal)?;
 
         if let ScreenResult::Ok(c) = choice {
-            if c.need_user_name() && username.is_empty() {
-                username = query_username(terminal)?;
+            // Check compatibility
+            if c.is_online_play_mode() && !checked_online_compatibility {
+                PopupScreen::new("🖥 Checking remote server version...").show_once(terminal)?;
+                let valid_version = match Client::get_server_version().await {
+                    Ok(v) => v.is_compatible_with_static_version().unwrap_or(false),
+                    Err(GetRemoteVersionError::ConnectionFailed) => {
+                        PopupScreen::new("❌ Could not connect to remote server!")
+                            .show(terminal)?;
+                        continue;
+                    }
+                    Err(GetRemoteVersionError::Other(e)) => {
+                        log::error!("Could not load remote server information! {:?}", e);
+                        false
+                    }
+                };
+
+                if !valid_version {
+                    PopupScreen::new("❌ Unfortunately, it seems that your version of Sea Battle Cli player is too old to be used online...\n\nPlease update it before trying to play online...").show(terminal)?;
+                    continue;
+                }
+
+                checked_online_compatibility = true;
+            }
+
+            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?
+                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(()),
         };
 
-        // Display game screen
-        GameScreen::new(client).show(terminal).await?;
+        match client {
+            Ok(client) => {
+                // Display game screen
+                GameScreen::new(client).show(terminal).await?;
+            }
+            Err(e) => {
+                log::error!("Failed to connect to server: {}", e);
+                PopupScreen::new("❌ Failed to connect to server!").show(terminal)?;
+            }
+        };
     }
 }
 

rust/sea_battle_cli_player/src/ui_screens/configure_game_rules.rs

@@ -16,7 +16,8 @@ use tui::{Frame, Terminal};
 
 use sea_battle_backend::data::GameRules;
 
-use crate::constants::{HIGHLIGHT_COLOR, TICK_RATE};
+use crate::consts::{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;
@@ -62,13 +63,13 @@ 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()? {
                     match key.code {
                         // Quit app
-                        KeyCode::Char('q') => return Ok(ScreenResult::Canceled),
+                        KeyCode::Char('q') | KeyCode::Esc => return Ok(ScreenResult::Canceled),
 
                         // Navigate between fields
                         KeyCode::Up | KeyCode::Left => cursor_pos -= 1,
@@ -179,9 +180,18 @@ impl GameRulesConfigurationScreen {
     }
 
     fn ui<B: Backend>(&mut self, f: &mut Frame<B>) {
-        let area = centered_rect_size(50, 23, &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()

rust/sea_battle_cli_player/src/ui_screens/confirm_dialog_screen.rs

@@ -9,7 +9,7 @@ use tui::text::*;
 use tui::widgets::*;
 use tui::{Frame, Terminal};
 
-use crate::constants::*;
+use crate::consts::*;
 use crate::ui_screens::utils::centered_rect_size;
 use crate::ui_screens::ScreenResult;
 use crate::ui_widgets::button_widget::ButtonWidget;
@@ -18,6 +18,7 @@ use crate::ui_widgets::button_widget::ButtonWidget;
 pub fn confirm<B: Backend>(terminal: &mut Terminal<B>, msg: &str) -> bool {
     matches!(
         ConfirmDialogScreen::new(msg)
+            .set_can_escape(true)
             .show(terminal)
             .unwrap_or(ScreenResult::Canceled),
         ScreenResult::Ok(true)
@@ -28,7 +29,7 @@ pub struct ConfirmDialogScreen<'a> {
     title: &'a str,
     msg: &'a str,
     is_confirm: bool,
-    can_cancel: bool,
+    can_escape: bool,
 }
 
 impl<'a> ConfirmDialogScreen<'a> {
@@ -37,10 +38,15 @@ impl<'a> ConfirmDialogScreen<'a> {
             title: "Confirmation Request",
             msg,
             is_confirm: true,
-            can_cancel: false,
+            can_escape: false,
         }
     }
 
+    pub fn set_can_escape(mut self, v: bool) -> Self {
+        self.can_escape = v;
+        self
+    }
+
     pub fn show<B: Backend>(
         mut self,
         terminal: &mut Terminal<B>,
@@ -56,7 +62,7 @@ impl<'a> ConfirmDialogScreen<'a> {
             if event::poll(timeout)? {
                 if let Event::Key(key) = event::read()? {
                     match key.code {
-                        KeyCode::Esc | KeyCode::Char('q') if self.can_cancel => {
+                        KeyCode::Esc | KeyCode::Char('q') if self.can_escape => {
                             return Ok(ScreenResult::Canceled)
                         }
 

rust/sea_battle_cli_player/src/ui_screens/game_screen.rs

@@ -16,11 +16,13 @@ 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::consts::*;
 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};
@@ -53,21 +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 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!",
+            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!",
         }
     }
 }
@@ -83,10 +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",
         }
     }
 }
@@ -136,7 +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
@@ -145,7 +147,7 @@ impl GameScreen {
 
                     match key.code {
                         // Leave game
-                        KeyCode::Char('q')
+                        KeyCode::Char('q') | KeyCode::Esc
                             if confirm(terminal, "Do you really want to leave game?") =>
                         {
                             self.client.close_connection().await;
@@ -241,7 +243,7 @@ impl GameScreen {
                     }
 
                     ServerMessage::InvalidInviteCode => {
-                        PopupScreen::new("Invalid invite code!").show(terminal)?;
+                        PopupScreen::new("❌ Invalid invite code!").show(terminal)?;
                         return Ok(ScreenResult::Ok(()));
                     }
 
@@ -364,6 +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);
             }
@@ -475,7 +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));
                 }
             }
 
@@ -544,7 +547,7 @@ impl GameScreen {
 
         // 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();
         }
 
@@ -570,15 +573,17 @@ impl GameScreen {
         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),
-                ])
+                .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() {

rust/sea_battle_cli_player/src/ui_screens/input_screen.rs

@@ -10,7 +10,7 @@ use tui::layout::*;
 use tui::widgets::*;
 use tui::{Frame, Terminal};
 
-use crate::constants::*;
+use crate::consts::*;
 use crate::ui_screens::utils::*;
 use crate::ui_screens::ScreenResult;
 use crate::ui_widgets::button_widget::ButtonWidget;
@@ -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

@@ -9,11 +9,17 @@ use tui::text::*;
 use tui::widgets::*;
 use tui::{Frame, Terminal};
 
-use crate::constants::*;
+use crate::consts::*;
 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,
@@ -46,7 +52,7 @@ impl<'a> PopupScreen<'a> {
             if event::poll(timeout)? {
                 if let Event::Key(key) = event::read()? {
                     match key.code {
-                        KeyCode::Char('q') => return Ok(ScreenResult::Canceled),
+                        KeyCode::Char('q') | KeyCode::Esc => return Ok(ScreenResult::Canceled),
                         KeyCode::Enter => {
                             return Ok(ScreenResult::Ok(()));
                         }

rust/sea_battle_cli_player/src/ui_screens/select_bot_type_screen.rs

@@ -11,7 +11,7 @@ use tui::{Frame, Terminal};
 
 use sea_battle_backend::data::{BotDescription, BotType, PlayConfiguration};
 
-use crate::constants::{HIGHLIGHT_COLOR, TICK_RATE};
+use crate::consts::{HIGHLIGHT_COLOR, TICK_RATE};
 use crate::ui_screens::utils::centered_rect_size;
 use crate::ui_screens::ScreenResult;
 
@@ -49,7 +49,7 @@ impl SelectBotTypeScreen {
             if event::poll(timeout)? {
                 if let Event::Key(key) = event::read()? {
                     match key.code {
-                        KeyCode::Char('q') => return Ok(ScreenResult::Canceled),
+                        KeyCode::Char('q') | KeyCode::Esc => return Ok(ScreenResult::Canceled),
                         KeyCode::Enter => {
                             return Ok(ScreenResult::Ok(self.types[self.curr_selection].r#type));
                         }

rust/sea_battle_cli_player/src/ui_screens/select_play_mode_screen.rs

@@ -1,7 +1,7 @@
 use std::io;
 use std::time::{Duration, Instant};
 
-use crate::constants::{HIGHLIGHT_COLOR, TICK_RATE};
+use crate::consts::{HIGHLIGHT_COLOR, TICK_RATE};
 use crate::ui_screens::utils::centered_rect_size;
 use crate::ui_screens::ScreenResult;
 use crossterm::event;
@@ -17,12 +17,25 @@ 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
+    }
+
+    /// Specify whether a play mode is to be played online or not
+    pub fn is_online_play_mode(&self) -> bool {
         self != &SelectPlayModeResult::PlayAgainstBot && self != &SelectPlayModeResult::Exit
     }
 }
@@ -33,17 +46,25 @@ 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,
     },
 ];
@@ -71,7 +92,7 @@ impl SelectPlayModeScreen {
             if crossterm::event::poll(timeout)? {
                 if let Event::Key(key) = event::read()? {
                     match key.code {
-                        KeyCode::Char('q') => return Ok(ScreenResult::Canceled),
+                        KeyCode::Char('q') | KeyCode::Esc => return Ok(ScreenResult::Canceled),
                         KeyCode::Enter => {
                             return Ok(ScreenResult::Ok(
                                 AVAILABLE_PLAY_MODES[self.curr_selection].value,
@@ -92,7 +113,7 @@ 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

@@ -12,9 +12,9 @@ use tui::{Frame, Terminal};
 
 use sea_battle_backend::data::*;
 
-use crate::constants::*;
+use crate::consts::*;
 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};
@@ -66,7 +66,7 @@ impl<'a> SetBoatsLayoutScreen<'a> {
                 let event = event::read()?;
                 if let Event::Key(key) = &event {
                     match key.code {
-                        KeyCode::Char('q') => {
+                        KeyCode::Char('q') | KeyCode::Esc => {
                             if !self.confirm_on_cancel
                                 || confirm(terminal, "Do you really want to quit?")
                             {
@@ -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/button_widget.rs

@@ -1,6 +1,6 @@
 use std::fmt::Display;
 
-use crate::constants::HIGHLIGHT_COLOR;
+use crate::consts::HIGHLIGHT_COLOR;
 use tui::buffer::Buffer;
 use tui::layout::Rect;
 use tui::style::{Color, Style};

rust/sea_battle_cli_player/src/ui_widgets/checkbox_widget.rs

@@ -1,4 +1,4 @@
-use crate::constants::HIGHLIGHT_COLOR;
+use crate::consts::HIGHLIGHT_COLOR;
 use std::fmt::Display;
 use tui::buffer::Buffer;
 use tui::layout::Rect;

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)
     }

rust/sea_battle_cli_player/src/ui_widgets/text_editor_widget.rs

@@ -1,6 +1,6 @@
 use std::fmt::Display;
 
-use crate::constants::HIGHLIGHT_COLOR;
+use crate::consts::HIGHLIGHT_COLOR;
 use tui::buffer::Buffer;
 use tui::layout::Rect;
 use tui::style::*;