.gitignore

@@ -1,4 +1,5 @@
-/target
+target/
 /Cargo.lock
 .idea/
 pkg/
+.nvmrc

Cargo.toml

@@ -1,22 +1,8 @@
-[package]
-name = "word_grid"
-version = "0.1.0"
-edition = "2021"
-authors = ["Joel Therrien"]
-repository = "https://git.joeltherrien.ca/joel/WordGrid"
-license = "AGPL-3"
-description = "A (WIP) package for playing 'WordGrid'."
+[workspace]
+members = ["wordgrid", "wasm", "server"]
+resolver = "2"
 
-[lib]
-crate-type = ["cdylib"]
-
-[dependencies]
-csv = "1.2.2"
+[workspace.dependencies]
+serde_json = "1.0.132"
+serde = { version = "1.0.213", features = ["derive"] }
 rand = {version = "0.8.5", features = ["small_rng"]}
-getrandom = {version = "0.2", features = ["js"]}
-wasm-bindgen = { version = "0.2.87", features = ["serde-serialize"] }
-serde_json = "1.0"
-serde = { version = "=1.0.171", features = ["derive"] }
-serde-wasm-bindgen = "0.4.5"
-tsify = { version = "0.4.5", features = ["js"] }
-

Dockerfile

@@ -0,0 +1,45 @@
+FROM docker.io/library/ubuntu:latest as build-stage
+LABEL authors="joel"
+
+ENV DEBIAN_FRONTEND noninteractive
+
+RUN apt-get update
+RUN apt-get upgrade -y
+RUN apt-get install --no-install-recommends -y rustup npm
+
+RUN rustup default stable
+RUN apt-get install --no-install-recommends -y gcc
+RUN apt-get install --no-install-recommends -y gcc-multilib
+
+RUN cargo install wasm-pack
+
+RUN mkdir /build
+WORKDIR /build/
+
+COPY Cargo.toml Cargo.lock /build/
+COPY --exclude=*/target/* wordgrid /build/wordgrid/
+COPY --exclude=*/target/* --exclude=*/pkg/* wasm /build/wasm/
+COPY --exclude=*/target/* server /build/server/
+COPY --exclude=*/node_modules/* --exclude=*/dist/* ui /build/ui/
+COPY resources /build/resources/
+
+RUN cd wasm && ~/.cargo/bin/wasm-pack build --target=web
+RUN cd ui && npm install
+RUN cd ui && npm run build
+RUN cd server && cargo build --release
+
+
+FROM docker.io/library/ubuntu:latest as final-image
+LABEL authors="joel"
+
+WORKDIR /srv/
+COPY --from=build-stage /build/ui/dist /srv/static
+COPY --from=build-stage /build/target/release/server server
+RUN cp /srv/static/*.csv dictionary.csv
+RUN echo '{"dictionary_path": "dictionary.csv", "static_path": "static"}' > config.json
+
+ENV ROCKET_ADDRESS=0.0.0.0
+ENV ROCKET_PORT=8000
+
+ENTRYPOINT ["./server"]
+EXPOSE 8000

resources/dictionary.csv

@@ -209609,7 +209609,6 @@ RUBYING,0.0
 RUBYLIKE,0.0
 RUBYTHROAT,0.0
 RUBYTHROATS,0.0
-RUC,-1.0
 RUCHE,0.329741454406077
 RUCHED,0.329741454406077
 RUCHES,0.0

server/Cargo.toml

@@ -0,0 +1,15 @@
+[package]
+name = "server"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+itertools = "0.13.0"
+rocket = { version = "0.5.1", features = ["json"] }
+word_grid = { path="../wordgrid" }
+serde_json = { workspace = true }
+serde = { workspace = true }
+uuid = { version = "1.11.0", features = ["serde", "v4"] }
+ws = { package = "rocket_ws", version = "0.1.1" }
+rand = { workspace = true }
+#futures = "0.3.30"

server/config.json

@@ -0,0 +1,4 @@
+{
+	"dictionary_path": "../resources/dictionary.csv",
+	"static_path": "../ui/dist"
+}

server/src/lib.rs

@@ -0,0 +1,130 @@
+use rocket::serde::{Deserialize, Serialize};
+use rocket::tokio::sync::broadcast::Sender;
+use rocket::tokio::sync::RwLock;
+use std::collections::HashMap;
+use std::sync::Weak;
+use word_grid::api::{APIGame, ApiState, Update};
+use word_grid::game::{Error, PlayedTile};
+use word_grid::player_interaction::ai::Difficulty;
+use ws::frame::{CloseCode, CloseFrame};
+
+pub fn escape_characters(x: &str) -> String {
+    let x = x
+        .replace("&", "&")
+        .replace("<", "&lt;")
+        .replace(">", "&gt;");
+
+    x
+}
+
+#[derive(Clone, Debug, Serialize, PartialEq)]
+pub struct Player {
+    pub name: String,
+}
+
+#[derive(Clone, Serialize, Debug)]
+pub struct PartyInfo {
+    pub ais: Vec<Difficulty>,
+    pub players: Vec<Player>,
+}
+
+impl PartyInfo {
+    fn new(host: Player) -> Self {
+        Self {
+            ais: Vec::new(),
+            players: vec![host],
+        }
+    }
+}
+
+pub struct Room {
+    pub party_info: PartyInfo,
+    pub game: Option<APIGame>,
+    pub sender: Sender<(Option<Player>, InnerRoomMessage)>,
+}
+
+impl Room {
+    pub fn new(host: Player) -> Self {
+        Self {
+            party_info: PartyInfo::new(host),
+            game: None,
+            sender: Sender::new(5),
+        }
+    }
+}
+
+#[derive(Clone, Serialize, Debug)]
+#[serde(tag = "type")]
+pub enum RoomEvent {
+    PlayerJoined { player: Player },
+    PlayerLeft { player: Player },
+    AIJoined { difficulty: Difficulty },
+    AILeft { index: usize },
+}
+
+#[derive(Clone, Serialize, Debug)]
+#[serde(tag = "type")]
+pub enum GameEvent {
+    TurnAction { state: ApiState, committed: bool },
+}
+
+#[derive(Clone, Serialize, Debug)]
+#[serde(tag = "type")]
+pub enum ServerToClientMessage {
+    RoomChange { event: RoomEvent, info: PartyInfo },
+    GameEvent { event: GameEvent },
+    GameError { error: Error },
+    Invalid { reason: String },
+}
+
+#[derive(Deserialize, Debug)]
+#[serde(tag = "type")]
+pub enum GameMove {
+    Pass,
+    Exchange {
+        tiles: Vec<bool>,
+    },
+    Play {
+        played_tiles: Vec<Option<PlayedTile>>,
+        commit_move: bool,
+    },
+    AddToDictionary {
+        word: String,
+    },
+}
+
+#[derive(Deserialize, Debug)]
+#[serde(tag = "type")]
+pub enum ClientToServerMessage {
+    Load,
+    StartGame,
+    GameMove { r#move: GameMove },
+    AddAI { difficulty: Difficulty },
+    RemoveAI { index: usize },
+}
+
+#[derive(Clone, Debug)]
+pub enum InnerRoomMessage {
+    PassThrough(ServerToClientMessage),
+    GameEvent(Option<Update>),
+}
+
+pub type RoomMap = HashMap<String, Weak<RwLock<Room>>>;
+
+pub fn reject_websocket_with_reason(
+    ws: ws::WebSocket,
+    close_code: CloseCode,
+    reason: String,
+) -> ws::Channel<'static> {
+    ws.channel(move |mut stream| {
+        Box::pin(async move {
+            let closeframe = CloseFrame {
+                code: close_code,
+                reason: reason.into(),
+            };
+            let _ = stream.close(Some(closeframe)).await;
+
+            Ok(())
+        })
+    })
+}

server/src/main.rs

@@ -0,0 +1,419 @@
+#[macro_use]
+extern crate rocket;
+
+use itertools::Itertools;
+use rand::prelude::SmallRng;
+use rand::SeedableRng;
+use rocket::fs::FileServer;
+use rocket::futures::{SinkExt, StreamExt};
+use rocket::serde::Deserialize;
+use rocket::tokio::sync::broadcast::Sender;
+use rocket::tokio::sync::{Mutex, RwLock};
+use rocket::tokio::time::interval;
+use rocket::{tokio, State};
+use server::{
+    escape_characters, reject_websocket_with_reason, ClientToServerMessage, GameEvent, GameMove,
+    InnerRoomMessage, Player, Room, RoomEvent, RoomMap, ServerToClientMessage,
+};
+use std::fs;
+use std::sync::{Arc, OnceLock};
+use std::time::Duration;
+use tokio::select;
+use word_grid::api::{APIGame, Update};
+use word_grid::dictionary::{Dictionary, DictionaryImpl};
+use word_grid::game::Game;
+use ws::frame::CloseCode;
+use ws::stream::DuplexStream;
+use ws::Message;
+
+async fn incoming_message_handler<E: std::fmt::Display>(
+    message: Option<Result<Message, E>>,
+    sender: &Sender<(Option<Player>, InnerRoomMessage)>,
+    player: &Player,
+    room: &Arc<RwLock<Room>>,
+    stream: &mut DuplexStream,
+) -> bool {
+    match message {
+        None => {
+            panic!("Not sure when this happens")
+        }
+        Some(message) => {
+            match message {
+                Ok(message) => {
+                    if matches!(message, Message::Ping(_)) || matches!(message, Message::Pong(_)) {
+                        return false;
+                    }
+                    let message = message.to_text().unwrap();
+                    if message.len() == 0 {
+                        println!("Received message of length zero");
+                        println!("Player {player:#?} is leaving");
+                        let mut room = room.write().await;
+
+                        let new_vec = room
+                            .party_info
+                            .players
+                            .iter()
+                            .filter(|p| !p.name.eq(&player.name))
+                            .map(|p| p.clone())
+                            .collect_vec();
+                        room.party_info.players = new_vec;
+
+                        let event = ServerToClientMessage::RoomChange {
+                            event: RoomEvent::PlayerLeft {
+                                player: player.clone(),
+                            },
+                            info: room.party_info.clone(),
+                        };
+                        sender
+                            .send((None, InnerRoomMessage::PassThrough(event)))
+                            .unwrap();
+
+                        // TODO - handle case where there are no players left
+
+                        return true;
+                    }
+
+                    println!("Received {message}");
+                    let message: ClientToServerMessage = serde_json::from_str(message).unwrap();
+
+                    // TODO
+                    println!("Received {message:#?} from client {}", player.name);
+                    match message {
+                        ClientToServerMessage::Load => {
+                            return !game_load(player, None, room, stream).await
+                        }
+                        ClientToServerMessage::StartGame => {
+                            let mut room = room.write().await;
+                            if room.game.is_some() {
+                                eprintln!(
+                                    "Player {} is trying to start an already started game",
+                                    player.name
+                                );
+                            } else {
+                                let rng = SmallRng::from_entropy();
+                                let dictionary = DICTIONARY.get().unwrap().clone();
+                                let player_names = room
+                                    .party_info
+                                    .players
+                                    .iter()
+                                    .map(|p| p.name.clone())
+                                    .collect_vec();
+                                let game = Game::new_specific(
+                                    rng,
+                                    dictionary,
+                                    player_names,
+                                    room.party_info.ais.clone(),
+                                );
+                                let game = APIGame::new(game);
+                                room.game = Some(game);
+
+                                sender
+                                    .send((None, InnerRoomMessage::GameEvent(None)))
+                                    .unwrap();
+                            }
+                        }
+                        ClientToServerMessage::GameMove { r#move } => {
+                            let mut room = room.write().await;
+                            if room.game.is_none() {
+                                let event = ServerToClientMessage::Invalid {
+                                    reason: format!("Game hasn't been started yet"),
+                                };
+                                let event = serde_json::to_string(&event).unwrap();
+                                let _ = stream.send(event.into()).await;
+                            } else {
+                                let game = room.game.as_mut().unwrap();
+                                let result = match r#move {
+                                    GameMove::Pass => game.pass(&player.name),
+                                    GameMove::Exchange { tiles } => {
+                                        game.exchange(&player.name, tiles)
+                                    }
+                                    GameMove::Play {
+                                        played_tiles,
+                                        commit_move,
+                                    } => {
+                                        let result =
+                                            game.play(&player.name, played_tiles, commit_move);
+                                        if result.is_ok() & !commit_move {
+                                            let event = ServerToClientMessage::GameEvent {
+                                                event: GameEvent::TurnAction {
+                                                    state: result.unwrap(),
+                                                    committed: false,
+                                                },
+                                            };
+                                            let event = serde_json::to_string(&event).unwrap();
+                                            let _ = stream.send(event.into()).await;
+                                            return false;
+                                        }
+                                        result
+                                    }
+                                    GameMove::AddToDictionary { word } => {
+                                        game.add_to_dictionary(&player.name, &word)
+                                    }
+                                };
+                                match result {
+                                    Ok(event) => {
+                                        sender
+                                            .send((None, InnerRoomMessage::GameEvent(event.update)))
+                                            .unwrap();
+                                    }
+                                    Err(error) => {
+                                        let event = ServerToClientMessage::GameError { error };
+                                        let event = serde_json::to_string(&event).unwrap();
+                                        let _ = stream.send(event.into()).await;
+                                    }
+                                }
+                            }
+                        }
+                        ClientToServerMessage::AddAI { difficulty } => {
+                            let mut room = room.write().await;
+                            room.party_info.ais.push(difficulty.clone());
+
+                            let event = ServerToClientMessage::RoomChange {
+                                event: RoomEvent::AIJoined { difficulty },
+                                info: room.party_info.clone(),
+                            };
+                            sender
+                                .send((None, InnerRoomMessage::PassThrough(event)))
+                                .unwrap();
+                        }
+                        ClientToServerMessage::RemoveAI { index } => {
+                            let mut room = room.write().await;
+                            if index < room.party_info.ais.len() {
+                                room.party_info.ais.remove(index);
+                                let event = ServerToClientMessage::RoomChange {
+                                    event: RoomEvent::AILeft { index },
+                                    info: room.party_info.clone(),
+                                };
+                                sender
+                                    .send((None, InnerRoomMessage::PassThrough(event)))
+                                    .unwrap();
+                            } else {
+                                let event = ServerToClientMessage::Invalid {
+                                    reason: format!("{index} is out of bounds"),
+                                };
+                                let event = serde_json::to_string(&event).unwrap();
+                                let _ = stream.send(event.into()).await;
+                            }
+                        }
+                    }
+                }
+                Err(e) => {
+                    println!("Received some kind of error {e}")
+                }
+            }
+        }
+    }
+
+    false
+}
+
+async fn game_load(
+    player: &Player,
+    update: Option<Update>,
+    room: &Arc<RwLock<Room>>,
+    stream: &mut DuplexStream,
+) -> bool {
+    // The game object was modified; we need to trigger a load from this player's perspective
+    let mut room = room.write().await;
+
+    let mut state = room.game.as_mut().unwrap().load(&player.name).unwrap();
+    state.update = update;
+    let event = ServerToClientMessage::GameEvent {
+        event: GameEvent::TurnAction {
+            state,
+            committed: true,
+        },
+    };
+
+    let text = serde_json::to_string(&event).unwrap();
+    let x = stream.send(text.into()).await;
+
+    x.is_ok()
+}
+
+async fn outgoing_message_handler<E: std::fmt::Debug>(
+    message: Result<(Option<Player>, InnerRoomMessage), E>,
+    _sender: &Sender<(Option<Player>, InnerRoomMessage)>,
+    player: &Player,
+    room: &Arc<RwLock<Room>>,
+    stream: &mut DuplexStream,
+) -> bool {
+    let (target, message) = message.unwrap();
+    println!("Inner room message - {:#?}", message);
+    if target.is_none() || target.unwrap() == *player {
+        match message {
+            InnerRoomMessage::PassThrough(event) => {
+                let text = serde_json::to_string(&event).unwrap();
+                let x = stream.send(text.into()).await;
+                x.is_err()
+            }
+            InnerRoomMessage::GameEvent(update) => !game_load(player, update, room, stream).await,
+        }
+    } else {
+        false
+    }
+}
+
+#[get("/room/<id>?<player_name>")]
+async fn room(
+    id: &str,
+    player_name: &str,
+    ws: ws::WebSocket,
+    rooms: &State<Mutex<RoomMap>>,
+) -> ws::Channel<'static> {
+    let id = escape_characters(id);
+    let player_name = escape_characters(player_name);
+
+    let mut rooms = rooms.lock().await;
+    let room = rooms.get(&id);
+
+    let player = Player {
+        name: player_name.to_string(),
+    };
+
+    fn make_join_event(room: &Room, player: &Player) -> ServerToClientMessage {
+        ServerToClientMessage::RoomChange {
+            event: RoomEvent::PlayerJoined {
+                player: player.clone(),
+            },
+            info: room.party_info.clone(),
+        }
+    }
+
+    let (room, mut receiver, sender, trigger_game_load) =
+        if room.is_none_or(|x| x.strong_count() == 0) {
+            println!("Creating new room");
+            let room = Room::new(player.clone());
+            let event = make_join_event(&room, &player);
+
+            let sender = room.sender.clone();
+            let receiver = sender.subscribe();
+
+            let arc = Arc::new(RwLock::new(room));
+
+            rooms.insert(id.to_string(), Arc::downgrade(&arc));
+            sender
+                .send((None, InnerRoomMessage::PassThrough(event)))
+                .unwrap();
+
+            (arc, receiver, sender, false)
+        } else {
+            let a = room.unwrap();
+            let b = a.clone();
+            let c = b.upgrade();
+            let d = c.unwrap();
+
+            let mut trigger_game_load = false;
+
+            // need to add player to group
+            let (sender, event) = {
+                let mut room = d.write().await;
+
+                // check if player is already in the room. If they are, don't allow the new connection
+                if room.party_info.players.contains(&player) {
+                    return reject_websocket_with_reason(
+                        ws,
+                        CloseCode::Protocol,
+                        format!("{} is already in the room", player.name),
+                    );
+                }
+
+                if let Some(game) = &room.game {
+                    if game
+                        .0
+                        .player_states
+                        .get_player_state(&player.name)
+                        .is_none()
+                    {
+                        // Game is in progress and our new player isn't a member
+                        return reject_websocket_with_reason(
+                            ws,
+                            CloseCode::Protocol,
+                            "The game is already in-progress".to_string(),
+                        );
+                    }
+                    trigger_game_load = true;
+                }
+
+                room.party_info.players.push(player.clone());
+                let sender = room.sender.clone();
+                let event = make_join_event(&room, &player);
+
+                (sender, event)
+            };
+            let receiver = sender.subscribe();
+            sender
+                .send((None, InnerRoomMessage::PassThrough(event)))
+                .unwrap();
+
+            (d, receiver, sender, trigger_game_load)
+        };
+
+    if trigger_game_load {
+        sender
+            .send((Some(player.clone()), InnerRoomMessage::GameEvent(None)))
+            .unwrap();
+    }
+
+    ws.channel(move |mut stream| {
+        Box::pin(async move {
+            let mut interval = interval(Duration::from_secs(10));
+            loop {
+                let incoming_message = stream.next();
+                let room_message = receiver.recv();
+                let ping_tick = interval.tick();
+
+                select! {
+                    // Rust formatter can't reach into this macro, hence we broke out the logic
+                    // into sub-functions
+                    message = incoming_message => {
+                        if incoming_message_handler(message, &sender, &player, &room, &mut stream).await {
+                            println!("incoming returned true");
+                            return Ok(())
+                        }
+                    },
+                    message = room_message => {
+                        if outgoing_message_handler(message, &sender, &player, &room, &mut stream).await {
+                            println!("outgoing returned true");
+                            return Ok(())
+                        }
+
+                    },
+                    _ = ping_tick => {
+                        // send keep-alive
+                        let message = Message::Ping(Vec::new());
+                        let result = stream.send(message.into()).await;
+                        // if it fails, disconnect
+                        if let Err(e) = result {
+                            println!("Failed to send ping for player {player:#?}; disconnecting");
+                            println!("Received error {e}");
+                            return Ok(())
+                        }
+                    }
+                }
+            }
+        })
+    })
+}
+
+#[derive(Debug, Deserialize)]
+struct Config {
+    dictionary_path: String,
+    static_path: String,
+}
+
+pub static DICTIONARY: OnceLock<DictionaryImpl> = OnceLock::new();
+
+#[launch]
+fn rocket() -> _ {
+    let config_str = fs::read_to_string("config.json").unwrap();
+    let config: Config = serde_json::from_str(&config_str).unwrap();
+
+    let dictionary = DictionaryImpl::create_from_path(&config.dictionary_path);
+    DICTIONARY.set(dictionary).unwrap();
+
+    rocket::build()
+        .manage(Mutex::new(RoomMap::new()))
+        .mount("/", FileServer::from(config.static_path))
+        .mount("/", routes![room])
+}

src/lib.rs

@@ -1,21 +0,0 @@
-use wasm_bindgen::prelude::wasm_bindgen;
-
-pub mod constants;
-pub mod board;
-pub mod dictionary;
-pub mod player_interaction;
-pub mod game;
-pub mod wasm;
-
-
-#[wasm_bindgen]
-extern {
-    pub fn alert(s: &str);
-}
-
-
-#[wasm_bindgen]
-pub fn greet(name: &str) {
-    alert(&format!("Hello, {}!", name));
-}
-

src/wasm.rs

@@ -1,213 +0,0 @@
-use serde::{Deserialize, Serialize};
-use serde_wasm_bindgen::Error;
-use tsify::Tsify;
-use wasm_bindgen::JsValue;
-use wasm_bindgen::prelude::wasm_bindgen;
-use crate::board::{CellType, Letter};
-use crate::game::{Game, GameState, PlayedTile};
-use crate::player_interaction::ai::Difficulty;
-
-#[wasm_bindgen]
-pub struct GameWasm(Game);
-
-#[derive(Serialize, Deserialize, Tsify)]
-#[tsify(from_wasm_abi)]
-pub enum ResponseType {
-    OK,
-    ERR,
-}
-
-#[derive(Serialize, Deserialize, Tsify)]
-#[tsify(from_wasm_abi)]
-pub struct MyResult<E: Serialize> {
-    response_type: ResponseType,
-    value: E,
-    game_state: Option<GameState>,
-}
-
-
-
-
-#[wasm_bindgen]
-impl GameWasm {
-
-    #[wasm_bindgen(constructor)]
-    pub fn new(seed: u64, dictionary_text: &str, ai_difficulty: JsValue) -> GameWasm {
-
-        let difficulty: Difficulty = serde_wasm_bindgen::from_value(ai_difficulty).unwrap();
-
-        GameWasm(Game::new(seed, dictionary_text, vec!["Player".to_string()], vec![difficulty]))
-    }
-
-    pub fn get_tray(&self, name: &str) -> Result<JsValue, Error> {
-        let tray = self.0.player_states.get_tray(name);
-
-        serde_wasm_bindgen::to_value(&tray)
-    }
-
-    pub fn get_board_cell_types(&self) -> Result<JsValue, Error> {
-        let board = self.0.get_board();
-
-        let cell_types: Vec<CellType> = board.cells.iter().map(|cell| -> CellType {
-            cell.cell_type.clone()
-        }).collect();
-
-        serde_wasm_bindgen::to_value(&cell_types)
-    }
-
-    pub fn get_board_letters(&self) -> Result<JsValue, Error> {
-        let board = self.0.get_board();
-
-        let letters: Vec<Option<Letter>> = board.cells.iter().map(|cell| -> Option<Letter> {
-            cell.value.clone()
-        }).collect();
-
-        serde_wasm_bindgen::to_value(&letters)
-    }
-
-    pub fn receive_play(&mut self, tray_tile_locations: JsValue, commit_move: bool) -> Result<JsValue, Error> {
-        let tray_tile_locations: Vec<Option<PlayedTile>> = serde_wasm_bindgen::from_value(tray_tile_locations)?;
-
-        let result = self.0.receive_play(tray_tile_locations, commit_move);
-
-        match result {
-            Ok((x, game_state)) => {
-                serde_wasm_bindgen::to_value(&MyResult {
-                    response_type: ResponseType::OK,
-                    value: x,
-                    game_state: Some(game_state)
-                })
-            },
-            Err(e) => {
-                serde_wasm_bindgen::to_value(&MyResult {
-                    response_type: ResponseType::ERR,
-                    value: e,
-                    game_state: None,
-                })
-            }
-        }
-
-
-    }
-
-    pub fn get_scores(&self) -> Result<JsValue, JsValue> {
-
-        #[derive(Serialize, Deserialize, Tsify)]
-        #[tsify(from_wasm_abi)]
-        pub struct PlayerAndScore {
-            name: String,
-            score: u32,
-        }
-
-        let scores: Vec<PlayerAndScore> = self.0.player_states.0.iter()
-            .map(|player_state| {
-                PlayerAndScore {
-                    name: player_state.player.get_name().to_string(),
-                    score: player_state.score,
-                }
-            })
-            .collect();
-
-        Ok(serde_wasm_bindgen::to_value(&scores)?)
-
-    }
-
-    pub fn exchange_tiles(&mut self, tray_tile_locations: JsValue) -> Result<JsValue, Error>{
-
-        let tray_tile_locations: Vec<bool> = serde_wasm_bindgen::from_value(tray_tile_locations)?;
-
-        match self.0.exchange_tiles(tray_tile_locations) {
-            Ok((_, turn_action, state)) => {
-                serde_wasm_bindgen::to_value(&MyResult {
-                    response_type: ResponseType::OK,
-                    value: turn_action,
-                    game_state: Some(state),
-                })
-            },
-            Err(e) => {
-                serde_wasm_bindgen::to_value(&MyResult {
-                    response_type: ResponseType::ERR,
-                    value: e,
-                    game_state: None,
-                })
-            }
-        }
-
-
-    }
-
-    pub fn add_word(&mut self, word: String) {
-        self.0.add_word(word);
-    }
-
-    pub fn skip_turn(&mut self) -> Result<JsValue, Error>{
-        let result = self.0.pass();
-        match result {
-            Ok(game_state) => {
-                Ok(serde_wasm_bindgen::to_value(&MyResult {
-                    response_type: ResponseType::OK,
-                    value: "Turn passed",
-                    game_state: Some(game_state),
-                })?)
-            },
-            Err(e) => {
-                Ok(serde_wasm_bindgen::to_value(&MyResult {
-                    response_type: ResponseType::ERR,
-                    value: e,
-                    game_state: None,
-                })?)
-            }
-        }
-    }
-
-    pub fn advance_turn(&mut self) -> Result<JsValue, Error> {
-        let result = self.0.advance_turn();
-
-        match result {
-            Ok((turn_advance_result, game_state)) => {
-                Ok(serde_wasm_bindgen::to_value(&MyResult {
-                    response_type: ResponseType::OK,
-                    value: turn_advance_result,
-                    game_state: Some(game_state),
-                })?)
-            },
-            Err(e) => {
-                Ok(serde_wasm_bindgen::to_value(&MyResult {
-                    response_type: ResponseType::ERR,
-                    value: e,
-                    game_state: None,
-                })?)
-            }
-        }
-
-
-    }
-
-    pub fn get_current_player(&self) -> String {
-        self.0.current_player_name()
-    }
-
-    pub fn get_remaining_tiles(&self) -> usize {
-        self.0.get_remaining_tiles()
-    }
-
-    pub fn get_player_tile_count(&self, player: &str) -> Result<JsValue, Error> {
-        match self.0.get_player_tile_count(player) {
-            Ok(count) => {
-                Ok(serde_wasm_bindgen::to_value(&MyResult{
-                    response_type: ResponseType::OK,
-                    value: count,
-                    game_state: None,
-                })?)
-            },
-            Err(msg) => {
-                Ok(serde_wasm_bindgen::to_value(&MyResult{
-                    response_type: ResponseType::OK,
-                    value: msg,
-                    game_state: None,
-                })?)
-            }
-        }
-    }
-
-}

ui/package.json

@@ -2,13 +2,13 @@
   "dependencies": {
     "react": "^18.2.0",
     "react-dom": "^18.2.0",
-    "word_grid": "file:../pkg"
+    "word_grid": "file:../wasm/pkg"
   },
   "devDependencies": {
     "@parcel/transformer-less": "^2.9.3",
     "@types/react": "^18.2.18",
     "@types/react-dom": "^18.2.7",
-    "parcel": "^2.9.3",
+    "parcel": "^2.12.0",
     "process": "^0.11.10"
   },
   "scripts": {

ui/src/Game.tsx

@@ -1,16 +1,5 @@
 import * as React from "react";
-import {useEffect, useMemo, useReducer, useRef, useState} from "react";
-import {
-    GameState,
-    GameWasm,
-    MyResult,
-    PlayedTile,
-    PlayerAndScore,
-    ScoreResult,
-    Tray,
-    TurnAction,
-    TurnAdvanceResult
-} from "../../pkg/word_grid";
+import {useEffect, useReducer, useRef, useState} from "react";
 import {
     Direction,
     GRID_LENGTH,
@@ -28,58 +17,75 @@ import {
 } from "./utils";
 import {TileExchangeModal} from "./TileExchange";
 import {Grid, Scores, TileTray} from "./UI";
+import {API, APIState, GameState, TurnAction, Tray, PlayedTile, Letter} from "./api";
 
 function addLogInfo(existingLog: React.JSX.Element[], newItem: React.JSX.Element) {
-    newItem = React.cloneElement(newItem, { key:  existingLog.length })
+    newItem = React.cloneElement(newItem, {key: existingLog.length})
     existingLog.push(newItem);
     return existingLog.slice();
 }
 
 export function Game(props: {
-    wasm: GameWasm,
+    api: API,
     settings: Settings,
     end_game_fn: () => void,
 }) {
 
-    const cellTypes = useMemo(() => {
-        return props.wasm.get_board_cell_types();
-    }, []);
-
-    const [isGameOver, setGameOver] = useState<boolean>(false);
+    const [api_state, setAPIState] = useState<APIState>(undefined);
     const [confirmedScorePoints, setConfirmedScorePoints] = useState<number>(-1);
+    const currentTurnNumber = useRef<number>(-1);
+    const historyProcessedNumber = useRef<number>(0);
+
+    let isGameOver = false;
+    if (api_state != null) {
+        isGameOver = api_state.public_information.game_state.type === "Ended";
+    }
+
+
+    function waitForUpdate() {
+        const result = props.api.load(true);
+
+        result.then(
+            (state) => {
+                setAPIState(state);
+            }
+        )
+            .catch((error) => {
+                console.log("waitForUpdate() failed")
+                console.log(error);
+            });
+    }
 
     const [boardLetters, setBoardLetters] = useState<HighlightableLetterData[]>(() => {
         const newLetterData = [] as HighlightableLetterData[];
-        for(let i=0; i<GRID_LENGTH * GRID_LENGTH; i++) {
-            newLetterData.push(undefined);
+        for (let i = 0; i < GRID_LENGTH * GRID_LENGTH; i++) {
+            newLetterData.push(null);
         }
         return newLetterData;
 
     });
 
     function adjustGridArrow(existing: GridArrowData, update: GridArrowDispatchAction): GridArrowData {
-        console.log({update});
-
-        if(update.action == GridArrowDispatchActionType.CLEAR) {
+        if (update.action == GridArrowDispatchActionType.CLEAR) {
             return null;
         } else if (update.action == GridArrowDispatchActionType.CYCLE) {
             // if there's nothing where the user clicked, we create a right arrow.
-            if(existing == null || existing.position != update.position) {
+            if (existing == null || existing.position != update.position) {
                 return {
                     direction: Direction.RIGHT, position: update.position
                 }
                 // if there's a right arrow, we shift to downwards
-            } else if(existing.direction == Direction.RIGHT) {
+            } else if (existing.direction == Direction.RIGHT) {
                 return {
                     direction: Direction.DOWN, position: existing.position
                 }
                 // if there's a down arrow, we clear it
-            } else if (existing.direction == Direction.DOWN){
+            } else if (existing.direction == Direction.DOWN) {
                 return null;
             }
 
         } else if (update.action == GridArrowDispatchActionType.SHIFT) {
-            if(existing == null) {
+            if (existing == null) {
                 // no arrow to shift
                 return null;
             } else {
@@ -88,7 +94,7 @@ export function Game(props: {
 
                 // we loop because we want to skip over letters that are already set
                 while (current_x < GRID_LENGTH && current_y < GRID_LENGTH) {
-                    if(existing.direction == Direction.RIGHT) {
+                    if (existing.direction == Direction.RIGHT) {
                         current_x += 1;
                     } else {
                         current_y += 1;
@@ -103,7 +109,7 @@ export function Game(props: {
                         }
                     }
 
-                    if(current_x < GRID_LENGTH && current_y < GRID_LENGTH && boardLetters[new_position] == null && !tray_letter_at_position) {
+                    if (current_x < GRID_LENGTH && current_y < GRID_LENGTH && boardLetters[new_position] == null && !tray_letter_at_position) {
                         return {
                             direction: existing.direction,
                             position: new_position,
@@ -119,38 +125,36 @@ export function Game(props: {
     }
 
     function exchangeFunction(selectedArray: Array<boolean>) {
+        const result = props.api.exchange(selectedArray);
 
-        const result: MyResult<TurnAction | string> = props.wasm.exchange_tiles(selectedArray);
-
-        if(result.response_type === "ERR") {
-            logDispatch(<div><em>{(result.value as string)}</em></div>);
-        } else {
-            handlePlayerAction(result.value as TurnAction, props.settings.playerName);
-            setTurnCount(turnCount + 1);
-
-            if(result.game_state.type === "Ended") {
-                endGame(result.game_state);
-            }
-        }
+        result
+            .then(
+                (api_state) => {
+                    setAPIState(api_state);
+                })
+            .catch((error) => {
+                console.error({error});
+                logDispatch(<div>{error}</div>);
+            });
 
     }
 
-    function addWordFn(word: string) {
-        props.wasm.add_word(word);
-    }
-
-
     const [gridArrow, gridArrowDispatch] = useReducer(adjustGridArrow, null);
     const [logInfo, logDispatch] = useReducer(addLogInfo, []);
 
+    useEffect(() => {
+        props.api.load(false)
+            .then((api_state) => {
+                setAPIState(api_state);
+            });
+    }, []);
 
     function movePlayableLetters(playerLetters: PlayableLetterData[], update: TileDispatchAction) {
+        if (update.action === TileDispatchActionType.RETRIEVE) {
 
-        if(update.action === TileDispatchActionType.RETRIEVE) {
+            let tray: Tray = api_state.tray;
 
-            let tray: Tray = props.wasm.get_tray("Player");
-
-            if(update.override) {
+            if (update.override) {
                 playerLetters = [];
             }
 
@@ -160,13 +164,13 @@ export function Game(props: {
             let startIndex = matchCoordinate(playerLetters, update.start);
             let endIndex = matchCoordinate(playerLetters, update.end);
 
-            if(startIndex != null) {
+            if (startIndex != null) {
                 let startLetter = playerLetters[startIndex];
                 startLetter.location = update.end.location;
                 startLetter.index = update.end.index;
             }
 
-            if(endIndex != null) {
+            if (endIndex != null) {
                 let endLetter = playerLetters[endIndex];
                 endLetter.location = update.start.location;
                 endLetter.index = update.start.index;
@@ -178,7 +182,7 @@ export function Game(props: {
         } else if (update.action === TileDispatchActionType.SET_BLANK) {
             const blankLetter = playerLetters[update.blankIndex];
 
-            if(blankLetter.text !== update.newBlankValue) {
+            if (blankLetter.text !== update.newBlankValue) {
                 blankLetter.text = update.newBlankValue;
                 if (blankLetter.location == LocationType.GRID) {
                     setConfirmedScorePoints(-1);
@@ -190,7 +194,7 @@ export function Game(props: {
             return mergeTrays(playerLetters, playerLetters);
         } else if (update.action === TileDispatchActionType.MOVE_TO_ARROW) {
             // let's verify that the arrow is defined, otherwise do nothing
-            if(gridArrow != null) {
+            if (gridArrow != null) {
                 const end_position = {
                     location: LocationType.GRID,
                     index: gridArrow.position,
@@ -215,35 +219,6 @@ export function Game(props: {
     }
 
     const [playerLetters, trayDispatch] = useReducer(movePlayableLetters, []);
-
-    const [turnCount, setTurnCount] = useState<number>(1);
-    const playerAndScores: PlayerAndScore[] = useMemo(() => {
-        return props.wasm.get_scores();
-    }, [turnCount, isGameOver]);
-
-
-
-    useEffect(() => {
-        const newLetterData = props.wasm.get_board_letters() as HighlightableLetterData[];
-
-        // we need to go through and set 'highlight' field to either true or false
-        // it will always be false if the player that just went was the AI
-        // TODO - build in support for multiple other players
-        for(let i=0; i<newLetterData.length; i++) {
-            const newLetter = newLetterData[i];
-            if(boardLetters[i] === undefined && newLetter !== undefined && playerTurnName == props.settings.playerName) {
-                newLetter.highlight = true;
-            } else if(newLetter !== undefined) {
-                newLetter.highlight = false;
-            }
-        }
-        setBoardLetters(newLetterData);
-    }, [turnCount]);
-
-    const playerTurnName = useMemo(() => {
-        return props.wasm.get_current_player();
-    }, [turnCount]);
-
     const logDivRef = useRef(null);
 
     const [isTileExchangeOpen, setIsTileExchangeOpen] = useState<boolean>(false);
@@ -255,65 +230,52 @@ export function Game(props: {
         }
     }, [logInfo]);
 
-    const remainingTiles = useMemo(() => {
-        return props.wasm.get_remaining_tiles();
-    }, [turnCount, isGameOver]);
-
-    const remainingAITiles = useMemo(() => {
-        let result = props.wasm.get_player_tile_count(props.settings.aiName) as MyResult<number | String>;
-        if(result.response_type == "OK") {
-            return result.value as number;
-        } else {
-            console.error(result.value);
-            return -1;
-        }
-
-    }, [turnCount, isGameOver]);
-
     function handlePlayerAction(action: TurnAction, playerName: string) {
 
-        if (action.type == "PlayTiles"){
+        if (action.type == "PlayTiles") {
             const result = action.result;
             result.words.sort((a, b) => b.score - a.score);
-            for(let word of result.words) {
+            for (let word of result.words) {
                 logDispatch(<div>{playerName} received {word.score} points for playing '{word.word}.'</div>);
             }
-            logDispatch(<div>{playerName} received a total of <strong>{result.total} points</strong> for their turn.</div>);
-        } else if(action.type == "ExchangeTiles") {
-            logDispatch(<div>{playerName} exchanged {action.tiles_exchanged} tile{action.tiles_exchanged > 1 ? 's' : ''} for their turn.</div>);
-        }
-        else if(action.type == "Pass"){
+            logDispatch(<div>{playerName} received a total of <strong>{result.total} points</strong> for their turn.
+            </div>);
+        } else if (action.type == "ExchangeTiles") {
+            logDispatch(
+                <div>{playerName} exchanged {action.tiles_exchanged} tile{action.tiles_exchanged > 1 ? 's' : ''} for
+                    their turn.</div>);
+        } else if (action.type == "Pass") {
             logDispatch(<div>{playerName} passed.</div>);
+        } else if (action.type == "AddToDictionary") {
+            logDispatch(<div>{playerName} added {action.word} to the dictionary.</div>)
+        } else {
+            console.error("Received unknown turn action: ", action);
         }
 
-        // Clear any on-screen arrows
-        gridArrowDispatch({action: GridArrowDispatchActionType.CLEAR});
     }
 
     function endGame(state: GameState) {
 
-        if(state.type != "InProgress") {
-
-            setGameOver(true);
+        if (state.type != "InProgress") {
             logDispatch(<h4>Scoring</h4>);
 
-            const scores = props.wasm.get_scores() as PlayerAndScore[];
+            const scores = api_state.public_information.players;
             let pointsBonus = 0;
-            for(const playerAndScore of scores) {
+            for (const playerAndScore of scores) {
                 const name = playerAndScore.name;
 
-                if(name == state.finisher) {
+                if (name == state.finisher) {
                     // we'll do the finisher last
                     continue
                 }
 
-                const letters = state.remaining_tiles.get(name);
-                if(letters.length == 0) {
+                const letters = state.remaining_tiles[name];
+                if (letters.length == 0) {
                     logDispatch(<div>{name} has no remaining tiles.</div>);
                 } else {
                     let pointsLost = 0;
                     let letterListStr = '';
-                    for(let i=0; i<letters.length; i++) {
+                    for (let i = 0; i < letters.length; i++) {
                         const letter = letters[i];
                         const letterText = letter.is_blank ? 'a blank' : letter.text;
                         pointsLost += letter.points;
@@ -321,13 +283,13 @@ export function Game(props: {
                         letterListStr += letterText;
 
                         // we're doing a list of 3 or more so add commas
-                        if(letters.length > 2) {
-                            if(i == letters.length - 2) {
+                        if (letters.length > 2) {
+                            if (i == letters.length - 2) {
                                 letterListStr += ', and ';
                             } else if (i < letters.length - 2) {
                                 letterListStr += ', ';
                             }
-                        } else if (i == 0 && letters.length == 2){
+                        } else if (i == 0 && letters.length == 2) {
                             // list of 2
                             letterListStr += ' and ';
                         }
@@ -338,7 +300,7 @@ export function Game(props: {
                 }
             }
 
-            if(state.finisher != null) {
+            if (state.finisher != null) {
                 logDispatch(<div>{state.finisher} receives {pointsBonus} bonus for completing first.</div>);
             }
 
@@ -348,15 +310,14 @@ export function Game(props: {
                 .at(0);
 
             const playersAtHighest = scores.filter((score) => score.score == highestScore);
-            let endGameMsg: string = '';
+            let endGameMsg: string;
 
-            if(playersAtHighest.length > 1 && state.finisher == null) {
+            if (playersAtHighest.length > 1 && state.finisher == null) {
                 endGameMsg = "Tie game!";
             } else if (playersAtHighest.length > 1 && state.finisher != null) {
                 // if there's a tie then the finisher gets the win
                 endGameMsg = `${playersAtHighest[0].name} won by finishing first!`;
-            }
-            else {
+            } else {
                 endGameMsg = `${playersAtHighest[0].name} won!`;
             }
             logDispatch(<h4>Game over - {endGameMsg}</h4>);
@@ -367,34 +328,83 @@ export function Game(props: {
 
     }
 
-    function runAI() {
-        const result: MyResult<TurnAdvanceResult> = props.wasm.advance_turn();
-        if(result.response_type === "OK" && result.value.type == "AIMove") {
-            handlePlayerAction(result.value.action, props.settings.aiName);
-            if(result.game_state.type === "Ended") {
-                endGame(result.game_state);
+    function updateBoardLetters(newLetters: Array<Letter>) {
+        const newLetterData = newLetters as HighlightableLetterData[];
+
+        for (let i = 0; i < newLetterData.length; i++) {
+            const newLetter = newLetterData[i];
+            if (newLetter != null) {
+                newLetter.highlight = false;
+            }
         }
 
-        } else {
-            // this would be quite surprising
-            console.error({result});
+        // loop through the histories backwards until we reach our player
+        for (let j = api_state.public_information.history.length - 1; j >= 0; j--) {
+            const update = api_state.public_information.history[j];
+            if (update.player == props.settings.playerName) {
+                break
+            }
+            if (update.type.type === "PlayTiles") {
+                for (let i of update.type.locations) {
+                    newLetterData[i].highlight = true;
+                }
+            }
         }
 
-        setTurnCount(turnCount + 1);
+        setBoardLetters(newLetterData);
     }
 
     useEffect(() => {
+        if (api_state) {
+            console.log("In state: ", api_state.public_information.current_turn_number);
+            console.log("In ref: ", currentTurnNumber.current);
+            console.debug(api_state);
+            if(currentTurnNumber.current < api_state.public_information.current_turn_number){
+                // We only clear everything if there's a chance the board changed
+                // We may have gotten a dictionary update event which doesn't count
+                gridArrowDispatch({action: GridArrowDispatchActionType.CLEAR});
                 trayDispatch({action: TileDispatchActionType.RETRIEVE});
                 setConfirmedScorePoints(-1);
-        if(!isGameOver){
-            logDispatch(<h4>Turn {turnCount}</h4>);
-            logDispatch(<div>{playerTurnName}'s turn</div>);
-            if(playerTurnName != props.settings.playerName && !isGameOver) {
-                runAI();
+                updateBoardLetters(api_state.public_information.board);
             }
-        }
-    }, [turnCount]);
 
+            for (let i = historyProcessedNumber.current; i < api_state.public_information.history.length; i++) {
+                const update = api_state.public_information.history[i];
+                if (update.turn_number > currentTurnNumber.current) {
+                    currentTurnNumber.current = update.turn_number;
+                    logDispatch(<h4>Turn {update.turn_number + 1}</h4>);
+                    const playerAtTurn = api_state.public_information.players[(update.turn_number) % api_state.public_information.players.length].name;
+                    logDispatch(<div>{playerAtTurn}'s turn</div>);
+
+                }
+                handlePlayerAction(update.type, update.player);
+
+            }
+            historyProcessedNumber.current = api_state.public_information.history.length;
+
+            if (!isGameOver) {
+                if(api_state.public_information.current_turn_number > currentTurnNumber.current){
+                    logDispatch(<h4>Turn {api_state.public_information.current_turn_number + 1}</h4>);
+                    logDispatch(<div>{api_state.public_information.current_player}'s turn</div>);
+                    currentTurnNumber.current = api_state.public_information.current_turn_number;
+                }
+            } else {
+                endGame(api_state.public_information.game_state);
+            }
+
+            if(api_state.public_information.current_player != props.settings.playerName) {
+                waitForUpdate();
+            }
+        }
+    }, [api_state]);
+
+    if(api_state == null){
+        return <div>Still loading</div>;
+    }
+
+    const playerAndScores = api_state.public_information.players;
+    const remainingTiles = api_state.public_information.remaining_tiles;
+    const isPlayersTurn = api_state.public_information.current_player == props.settings.playerName;
 
     return <>
         <TileExchangeModal
@@ -405,7 +415,7 @@ export function Game(props: {
         />
         <div className="board-log">
             <Grid
-                cellTypes={cellTypes}
+                cellTypes={api_state.public_information.cell_types}
                 playerLetters={playerLetters}
                 boardLetters={boardLetters}
                 tileDispatch={trayDispatch}
@@ -431,32 +441,29 @@ export function Game(props: {
                 <div>
                     {remainingTiles} letters remaining
                 </div>
-                <div>
-                    {props.settings.aiName} has {remainingAITiles} tiles
-                </div>
                 <button
-                    disabled={remainingTiles == 0 || isGameOver}
+                    disabled={remainingTiles == 0 || isGameOver || !isPlayersTurn}
                     onClick={() => {
                         trayDispatch({action: TileDispatchActionType.RETURN}); // want all tiles back on tray for tile exchange
                         setIsTileExchangeOpen(true);
-                    }}>Open Tile Exchange</button>
+                    }}>Open Tile Exchange
+                </button>
             </div>
-        
             <TileTray letters={playerLetters} trayLength={props.settings.trayLength} trayDispatch={trayDispatch}/>
             <div className="player-controls">
                 <button
                     className="check"
-                    disabled={isGameOver}
-                    onClick={() => {
+                    disabled={isGameOver || !isPlayersTurn}
+                    onClick={async () => {
                         const playedTiles = playerLetters.map((i) => {
-                        if (i === undefined) {
+                            if (i == null) {
                                 return null;
                             }
 
                             if (i.location === LocationType.GRID) {
                                 let result: PlayedTile = {
                                     index: i.index,
-                                character: undefined
+                                    character: null
                                 };
                                 if (i.is_blank) {
                                     result.character = i.text;
@@ -468,38 +475,47 @@ export function Game(props: {
                             return null;
                         });
 
-                    const result: MyResult<{ type: "PlayTiles"; result: ScoreResult } | string> = props.wasm.receive_play(playedTiles, confirmedScorePoints > -1);
-                    console.log({result});
+                        const committing = confirmedScorePoints > -1;
+                        const result = props.api.play(playedTiles, committing);
 
-                    if(result.response_type === "ERR") {
-                        const message = result.value as string;
-                        if (message.endsWith("is not a valid word")) {
-                            // extract out word
-                            const word = message.split(" ")[0];
-                            logDispatch(<AddWordButton word={word} addWordFn={addWordFn} />);
-                        } else {
-                            logDispatch(<div><em>{message}</em></div>);
+                        result
+                            .then(
+                                (api_state) => {
+                                    console.log("Testing45")
+                                    console.log({api_state});
+
+                                    const play_tiles: TurnAction = api_state.update.type;
+                                    if (play_tiles.type == "PlayTiles") {
+                                        setConfirmedScorePoints(play_tiles.result.total);
+
+                                        if (committing) {
+                                            setAPIState(api_state);
                                         }
 
                                     } else {
-
-                        const score_result = (result.value as { type: "PlayTiles"; result: ScoreResult }).result;
-                        const total_points = score_result.total;
-
-
-                        if (confirmedScorePoints > -1) {
-                            handlePlayerAction({type: "PlayTiles", result: score_result}, props.settings.playerName);
-                            setTurnCount(turnCount + 1);
+                                        console.error("Inaccessible branch!!!")
                                     }
-
-                        if (result.game_state.type === "Ended") {
-                            endGame(result.game_state);
                                 }
+                            )
+                            .catch((error) => {
+                                console.error({error});
 
-                        setConfirmedScorePoints(total_points);
+                                if (error.endsWith(" is not a valid word")) {
+                                    const word = error.split(' ')[0];
+                                    // For whatever reason I can't pass props.api.add_to_dictionary directly
+                                    logDispatch(<AddWordButton word={word}
+                                                               addWordFn={(word) => {
+                                                                   props.api.add_to_dictionary(word)
+                                                                       .then((api_state) => {
+                                                                           setAPIState(api_state);
+                                                                       })
+                                                               }}/>);
+                                } else {
+                                    logDispatch(<div>{error}</div>);
                                 }
 
 
+                            });
 
                     }}>{confirmedScorePoints > -1 ? `Score ${confirmedScorePoints} points` : "Check"}</button>
                 <button
@@ -507,31 +523,35 @@ export function Game(props: {
                     disabled={isGameOver}
                     onClick={() => {
                         trayDispatch({action: TileDispatchActionType.RETURN});
-                }}>Return Tiles</button>
+                    }}>Return Tiles
+                </button>
                 <button
                     className="pass"
-                    disabled={isGameOver}
+                    disabled={isGameOver || !isPlayersTurn}
                     onClick={() => {
                         if (window.confirm("Are you sure you want to pass?")) {
-                        const result = props.wasm.skip_turn() as MyResult<string>;
-                        handlePlayerAction({type: "Pass"}, props.settings.playerName);
-                        setTurnCount(turnCount + 1);
+                            const result = props.api.pass();
 
-                        if (result.game_state.type === "Ended") {
-                            endGame(result.game_state);
+                            result
+                                .then(
+                                    (api_state) => {
+                                        setAPIState(api_state);
+                                    })
+                                .catch((error) => {
+                                    console.error({error});
+                                    logDispatch(<div>{error}</div>);
+                                });
                         }
-                    }
-                }}>Pass</button>
+                    }}>Pass
+                </button>
 
             </div>
         </div>
-
-
     </>;
 
 }
 
-function AddWordButton(props: {word: string, addWordFn: (x: string) => void}) {
+function AddWordButton(props: { word: string, addWordFn: (x: string) => void }) {
     const [isClicked, setIsClicked] = useState<boolean>(false);
 
     if (!isClicked) {
@@ -549,7 +569,7 @@ function AddWordButton(props: {word: string, addWordFn: (x: string) => void}) {
         </div>;
     } else {
         return <div>
-            <em>{props.word} was added to dictionary.</em>
+            <em>Adding {props.word} to dictionary.</em>
         </div>;
     }
 

ui/src/Menu.tsx

@@ -1,8 +1,10 @@
 import * as React from "react";
 import {useState} from "react";
-import {Difficulty, GameWasm} from '../../pkg/word_grid';
 import {Settings} from "./utils";
 import {Game} from "./Game";
+import {API, Difficulty} from "./api";
+import {WasmAPI} from "./wasm_api";
+import {AISelection} from "./UI";
 
 export function Menu(props: {settings: Settings, dictionary_text: string}) {
 
@@ -22,46 +24,12 @@ export function Menu(props: {settings: Settings, dictionary_text: string}) {
 
         return <dialog open>
             <div className="new-game">
-                <div className="grid">
-                    <label htmlFor="proportion-dictionary">AI's proportion of dictionary:</label>
-                    <input type="number"
-                           name="proportion-dictionary"
-                           value={proportionDictionary}
-                           onInput={(e) => {
-                               setProportionDictionary(parseInt(e.currentTarget.value));
-                           }}
-                           min={1}
-                           max={100}/>
-                    <label htmlFor="randomness">Level of randomness in AI:</label>
-                    <input type="number"
-                           name="randomness"
-                           value={aiRandomness}
-                           onInput={(e) => {
-                               setAIRandomness(parseInt(e.currentTarget.value));
-                           }}
-                           min={0}
-                           max={100}/>
-                </div>
-                <details>
-                    <ul>
-                        <li>
-                            "AI's proportion of dictionary" controls what percent of the total AI dictionary
-                            the AI can form words with. At 100%, it has access to its entire dictionary -
-                            although this dictionary is still less than what the player has access to.</li>
-                        <li>
-                            <div>
-                                "Level of randomness in AI" controls the degree to which the AI picks the optimal move
-                                for each of its turns. At 0, it always picks the highest scoring move it can do using the
-                                dictionary it has access to. At 1, it picks from its available moves at random.
-                            </div>
-                            <div>
-                                Note that "Level of randomness in AI" is now mapped on a log scale.
-                                Your current setting is equivalent to {(100*processedAIRandomness).toFixed(1)}% on the previous scale.
-                            </div>
-                        </li>
-
-                    </ul>
-                </details>
+                <AISelection
+                    aiRandomness={aiRandomness}
+                    setAIRandomness={setAIRandomness}
+                    proportionDictionary={proportionDictionary}
+                    setProportionDictionary={setProportionDictionary}
+                />
                 <div className="selection-buttons">
                     <button onClick={() => {
                         const seed = new Date().getTime();
@@ -70,8 +38,8 @@ export function Menu(props: {settings: Settings, dictionary_text: string}) {
                             proportion: processedProportionDictionary,
                             randomness: processedAIRandomness,
                         };
-                        const game_wasm = new GameWasm(BigInt(seed), props.dictionary_text, difficulty);
-                        const game = <Game settings={props.settings} wasm={game_wasm} key={seed} end_game_fn={() => setGame(null)}/>
+                        const game_wasm: API = new WasmAPI(BigInt(seed), props.dictionary_text, difficulty);
+                        const game = <Game settings={props.settings} api={game_wasm} key={seed} end_game_fn={() => setGame(null)}/>
                         setGame(game);
                     }}>New Game</button>
                 </div>

ui/src/TileExchange.tsx

@@ -1,8 +1,8 @@
 import {addNTimes, PlayableLetterData} from "./utils";
 import {useEffect, useState} from "react";
 import {Modal} from "./Modal";
-import {Letter as LetterData} from "../../pkg/word_grid";
 import * as React from "react";
+import {Letter} from "./api";
 
 export function TileExchangeModal(props: {
     playerLetters: PlayableLetterData[],
@@ -105,7 +105,7 @@ function TilesExchangedTray(props: {
 }
 
 function DummyExchangeTile(props: {
-    letter: LetterData,
+    letter: Letter,
     isSelected: boolean,
     onClick: () => void,
 }){

ui/src/UI.tsx

@@ -1,8 +1,6 @@
 import * as React from "react";
 import {ChangeEvent, JSX} from "react";
-import {PlayerAndScore} from "../../pkg/word_grid";
 import {
-    CellType,
     cellTypeToDetails,
     CoordinateData,
     GridArrowData,
@@ -14,15 +12,16 @@ import {
     TileDispatch,
     TileDispatchActionType,
 } from "./utils";
+import {APIPlayer, CellType} from "./api";
 
 
 export function TileSlot(props: {
-        tile?: React.JSX.Element | undefined,
+        tile?: React.JSX.Element | null,
         location: CoordinateData,
         tileDispatch: TileDispatch,
         arrowDispatch?: GridArrowDispatch,
 }): React.JSX.Element {
-    let isDraggable = props.tile !== undefined;
+    let isDraggable = props.tile != null;
 
     function onDragStart(e: React.DragEvent<HTMLDivElement>) {
         e.dataTransfer.effectAllowed = "move";
@@ -49,7 +48,7 @@ export function TileSlot(props: {
     } else if(props.location.location == LocationType.TRAY && props.tile != null && props.tile.props.data.text != ' ' && props.tile.props.data.text != '') {
         onClick = () => {
             props.tileDispatch({
-                action: TileDispatchActionType.MOVE_TO_ARROW, end: undefined, start: props.location,
+                action: TileDispatchActionType.MOVE_TO_ARROW, end: null, start: props.location,
             });
         }
     }
@@ -181,7 +180,7 @@ export function Grid(props: {
         const {className, text} = cellTypeToDetails(ct);
 
         let tileElement: JSX.Element;
-        if (props.boardLetters[i] !== undefined) {
+        if (props.boardLetters[i] != null) {
             tileElement = <Letter data={props.boardLetters[i]} />;
         } else {
             tileElement = <>
@@ -234,11 +233,12 @@ export function Grid(props: {
     </div>
 }
 
-export function Scores(props: {playerScores: Array<PlayerAndScore>}){
+export function Scores(props: {playerScores: Array<APIPlayer>}){
     let elements = props.playerScores.map((ps) => {
         return <div key={ps.name}>
             <h3>{ps.name}</h3>
-            <span>{ps.score}</span>
+            <div>{ps.score}</div>
+            <div>({ps.tray_tiles} tiles remaining)</div>
         </div>;
     });
 
@@ -246,3 +246,61 @@ export function Scores(props: {playerScores: Array<PlayerAndScore>}){
         {elements}
     </div>
 }
+
+export function AISelection(props: {
+    aiRandomness: number,
+    setAIRandomness: (x: number) => void,
+    proportionDictionary: number,
+    setProportionDictionary: (x: number) => void,
+}) {
+
+
+    // Can change log scale to control shape of curve using following equation:
+    // aiRandomness = log(1 + x*(n-1))/log(n) when x, the user input, ranges between 0 and 1
+    const logBase: number = 10000;
+    const processedAIRandomness = Math.log(1 + (logBase - 1)*props.aiRandomness/100) / Math.log(logBase);
+    //const processedProportionDictionary = 1.0 - props.proportionDictionary / 100;
+
+        return  <>
+                <div className="ai-grid">
+                    <label htmlFor="proportion-dictionary">AI's proportion of dictionary:</label>
+                    <input type="number"
+                           name="proportion-dictionary"
+                           value={props.proportionDictionary}
+                           onInput={(e) => {
+                               props.setProportionDictionary(e.currentTarget.valueAsNumber);
+                           }}
+                           min={1}
+                           max={100}/>
+                    <label htmlFor="randomness">Level of randomness in AI:</label>
+                    <input type="number"
+                           name="randomness"
+                           value={props.aiRandomness}
+                           onInput={(e) => {
+                               props.setAIRandomness(e.currentTarget.valueAsNumber);
+                           }}
+                           min={0}
+                           max={100}/>
+                </div>
+                <details>
+                    <ul>
+                        <li>
+                            "AI's proportion of dictionary" controls what percent of the total AI dictionary
+                            the AI can form words with. At 100%, it has access to its entire dictionary -
+                            although this dictionary is still less than what the player has access to.</li>
+                        <li>
+                            <div>
+                                "Level of randomness in AI" controls the degree to which the AI picks the optimal move
+                                for each of its turns. At 0, it always picks the highest scoring move it can do using the
+                                dictionary it has access to. At 1, it picks from its available moves at random.
+                            </div>
+                            <div>
+                                Note that "Level of randomness in AI" is now mapped on a log scale.
+                                Your current setting is equivalent to {(100*processedAIRandomness).toFixed(1)}% on the previous scale.
+                            </div>
+                        </li>
+
+                    </ul>
+                </details>
+            </>
+}

ui/src/api.ts

@@ -0,0 +1,91 @@
+export interface Tray {
+    letters: (Letter | null)[];
+}
+
+export interface ScoreResult {
+    words: WordResult[];
+    total: number;
+}
+
+export interface WordResult {
+    word: string;
+    score: number;
+}
+
+export interface PlayedTile {
+    index: number;
+    character?: string;
+}
+
+export interface Difficulty {
+    proportion: number;
+    randomness: number;
+}
+
+export interface Letter {
+    text: string;
+    points: number;
+    ephemeral: boolean;
+    is_blank: boolean;
+}
+
+
+export type TurnAction = { type: "Pass" } | { type: "ExchangeTiles"; tiles_exchanged: number } | { type: "PlayTiles"; result: ScoreResult; locations: number[] } | {type: "AddToDictionary"; word: string;};
+
+export enum CellType {
+    Normal = "Normal",
+    DoubleWord = "DoubleWord",
+    DoubleLetter = "DoubleLetter",
+    TripleLetter = "TripleLetter",
+    TripleWord = "TripleWord",
+    Start = "Start",
+}
+
+export type GameState = { type: "InProgress" } | { type: "Ended"; finisher?: string; remaining_tiles: {[id: string]: Letter[]} };
+
+export interface APIPlayer {
+    name: string;
+    tray_tiles: number;
+    score: number
+}
+
+export interface PublicInformation {
+    game_state: GameState;
+    board: Array<Letter>;
+    cell_types: Array<CellType>;
+    current_player: string;
+    players: Array<APIPlayer>;
+    remaining_tiles: number;
+    history: Array<Update>;
+    current_turn_number: number;
+}
+
+export interface Update {
+    type: TurnAction,
+    player: string;
+    turn_number: number;
+}
+
+export interface APIState {
+    public_information: PublicInformation;
+    tray: Tray;
+    update?: Update;
+}
+
+export interface Result<A, B> {
+    "Ok"?: A;
+    "Err"?: B;
+}
+
+export function is_ok<A, B>(result: Result<A, B>): boolean {
+    return result["Ok"] != null;
+}
+
+export interface API {
+    exchange: (selection: Array<boolean>) => Promise<APIState>;
+    pass: () => Promise<APIState>;
+    play: (tiles: Array<PlayedTile>, commit: boolean) => Promise<APIState>;
+    add_to_dictionary: (word: string) => Promise<APIState>;
+    load: (wait: boolean) => Promise<APIState>;
+
+}

ui/src/index.html

@@ -1,13 +1,13 @@
-<!doctype html>
-<html lang="en-US">
-  <head>
-    <meta charset="utf-8" />
-    <link rel="stylesheet" href="style.less" />
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
     <title>Word Grid</title>
-  </head>
-  <body>
-	  <script src="index.tsx" type="module"></script>
-      <div id="root"></div>
-  </body>
+</head>
+<body>
+    <ul>
+        <li><a href="singleplayer.html">Singleplayer</a></li>
+        <li><a href="multiplayer.html">Multiplayer</a></li>
+    </ul>
+</body>
 </html>
-

ui/src/multiplayer.html

@@ -0,0 +1,12 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <link rel="stylesheet" href="style.less" />
+    <title>Word Grid</title>
+</head>
+<body>
+  <script src="multiplayer.tsx" type="module"></script>
+  <div id="root"></div>
+</body>
+</html>

ui/src/multiplayer.tsx

@@ -0,0 +1,167 @@
+import * as React from "react";
+import {useState} from "react";
+import {createRoot} from "react-dom/client";
+import {AISelection} from "./UI";
+import {ClientToServerMessage, WSAPI, PartyInfo, ServerToClientMessage} from "./ws_api";
+import {Game} from "./Game";
+
+const LOGBASE = 10000;
+
+function unprocessAIRandomness(processedAIRandomness: number): string {
+    const x = 100 * (LOGBASE ** processedAIRandomness - 1) / (LOGBASE - 1)
+    return x.toFixed(0)
+}
+
+function unprocessedAIProportion(processedProportion: number): string {
+    return (100 * (1 - processedProportion)).toFixed(0);
+}
+
+export function Menu(): React.JSX.Element {
+
+    const [roomName, setRoomName] = useState<string>("");
+    const [socket, setSocket] = useState<WebSocket>(null);
+    const [partyInfo, setPartyInfo] = useState<PartyInfo>(null);
+    const [playerName, setPlayerName] = useState<string>("");
+
+    const [aiRandomness, setAIRandomness] = useState<number>(6);
+    const [proportionDictionary, setProportionDictionary] = useState<number>(7);
+    const [game, setGame] = useState<React.JSX.Element>(null);
+
+    const validSettings = roomName.length > 0 && !roomName.includes("/") && playerName.length > 0 && !playerName.includes("?") && !playerName.includes("&");
+
+    // Can change log scale to control shape of curve using following equation:
+    // aiRandomness = log(1 + x*(n-1))/log(n) when x, the user input, ranges between 0 and 1
+    const processedAIRandomness = Math.log(1 + (LOGBASE - 1) * aiRandomness / 100) / Math.log(LOGBASE);
+    const processedProportionDictionary = 1.0 - proportionDictionary / 100;
+
+    if (game) {
+        return game;
+    } else if (socket != null && partyInfo == null) {
+        return <div><p>Connecting to {roomName}</p></div>
+    } else if (partyInfo != null) {
+        const players = partyInfo.players.map((x) => {
+            return <li key={x.name}>{x.name}</li>;
+        });
+        const ais = partyInfo.ais.map((x, i) => {
+            return <li key={i} className="side-grid">
+                <span>Proportion: {unprocessedAIProportion(x.proportion)} / Randomness: {unprocessAIRandomness(x.randomness)}</span>
+                <button onClick={() => {
+                    const event = {
+                        type: "RemoveAI",
+                        index: i
+                    };
+                    socket.send(JSON.stringify(event));
+                }
+                }>Delete
+                </button>
+            </li>
+        });
+
+
+        return <dialog open className="multiplayer-lobby">
+            <p>Connected to {roomName}</p>
+            Players: <ol>
+            {players}
+        </ol>
+            AIs: <ol>
+            {ais}
+        </ol>
+            <details className="multiplayer-ai-details">
+                <summary>Add AI</summary>
+                <AISelection aiRandomness={aiRandomness} setAIRandomness={setAIRandomness}
+                             proportionDictionary={proportionDictionary}
+                             setProportionDictionary={setProportionDictionary}/>
+                <button onClick={() => {
+                    const event = {
+                        type: "AddAI",
+                        difficulty: {
+                            proportion: processedProportionDictionary,
+                            randomness: processedAIRandomness,
+                        }
+                    };
+                    socket.send(JSON.stringify(event));
+                }}>
+                    Add AI
+                </button>
+            </details>
+            <div className="side-grid">
+                <button onClick={() => {
+                    socket.close();
+                    setSocket(null);
+                    setPartyInfo(null);
+                }}>Disconnect
+                </button>
+                <button onClick={() => {
+                    const event: ClientToServerMessage = {
+                        type: "StartGame"
+                    };
+                    socket.send(JSON.stringify(event));
+                }}>Start Game
+                </button>
+            </div>
+
+
+        </dialog>
+
+    } else {
+        return <dialog open>
+            <div className="multiplayer-inputs-grid">
+                <label>
+                    Room Name:
+                    <input type="text" value={roomName} onChange={(e) => {
+                        setRoomName(e.target.value)
+                    }}></input>
+                </label>
+                <label>
+                    Player Name:
+                    <input type="text" value={playerName} onChange={(e) => {
+                        setPlayerName(e.target.value)
+                    }}></input>
+                </label>
+
+                <button
+                    disabled={!validSettings}
+                    onClick={() => {
+                        let socket = new WebSocket(`/room/${roomName}?player_name=${playerName}`)
+                        socket.addEventListener("message", (event) => {
+                            const input: ServerToClientMessage = JSON.parse(event.data);
+                            if (input.type == "RoomChange") {
+                                setPartyInfo(input.info);
+                            } else if (input.type == "GameEvent" && game == null) {
+                                // start game
+                                setGame(<Game api={new WSAPI(socket)} settings={{
+                                    playerName: playerName,
+                                    trayLength: 7,
+                                }} end_game_fn={function (): void {
+                                    socket.close();
+                                    setSocket(null);
+                                    setPartyInfo(null);
+                                    setGame(null);
+                                }}/>);
+                            }
+                            console.log("Message from server ", event.data);
+                        });
+                        socket.addEventListener("close", (event) => {
+                            console.log({event});
+                            setSocket(null);
+                            setPartyInfo(null);
+                            setGame(null);
+                            if (event.reason != null && event.reason.length > 0) {
+                                alert(`Disconnected with reason "${event.reason} & code ${event.code}"`);
+                            }
+                        });
+                        setSocket(socket);
+                    }}>Connect
+                </button>
+            </div>
+        </dialog>;
+    }
+}
+
+async function run() {
+    const root = createRoot(document.getElementById("root"));
+    root.render(<Menu/>);
+
+}
+
+run();

ui/src/singleplayer.html

@@ -0,0 +1,13 @@
+<!doctype html>
+<html lang="en-US">
+  <head>
+    <meta charset="utf-8" />
+    <link rel="stylesheet" href="style.less" />
+    <title>Word Grid</title>
+  </head>
+  <body>
+	  <script src="singleplayer.tsx" type="module"></script>
+      <div id="root"></div>
+  </body>
+</html>
+

ui/src/singleplayer.tsx

@@ -1,4 +1,4 @@
-import init from '../../pkg/word_grid.js';
+import init from 'word_grid';
 import {createRoot} from "react-dom/client";
 import * as React from "react";
 import {Menu} from "./Menu";
@@ -50,8 +50,6 @@ async function run() {
     root.render(<Menu dictionary_text={dictionary_text} settings={{
         trayLength: 7,
         playerName: 'Player',
-        aiName: 'AI',
-    
     }}/>);
 
 }

ui/src/style.less

@@ -204,9 +204,7 @@
 
   .scoring {
     text-align: center;
-    display: grid;
-    grid-template-columns: 1fr 1fr;
-    grid-template-rows: none;
+    display: flex;
 
     span {
       font-size: 20px;
@@ -215,25 +213,49 @@
     div {
       margin-left: 10px;
       margin-right: 10px;
+      flex: 1;
     }
   }
 }
 
+.multiplayer-inputs-grid {
+  display: grid;
+  //grid-template-columns: 3fr 2fr;
+  //grid-column-gap: 1em;
+  grid-row-gap: 0.5em;
 
-dialog {
-  border-radius: 10px;
-  z-index: 1;
+  label {
+    display: grid;
+    grid-template-columns: 3fr 2fr;
+  }
+}
 
-  .new-game {
-    width: 50em;
-
-    .grid {
+.ai-grid{
   display: grid;
   grid-template-columns: 3fr 2fr;
   grid-column-gap: 1em;
   grid-row-gap: 0.5em;
+}
 
+.side-grid {
+  display: grid;
+  grid-template-columns: 1fr 1fr;
+  grid-column-gap: 1em;
+}
+
+.multiplayer-ai-details {
+  button {
+    margin: 1em;
   }
+}
+
+dialog {
+  border-radius: 10px;
+  z-index: 1;
+  width: 50em;
+
+  .new-game {
+    width: 50em;
 
     .selection-buttons {
       display: grid;

ui/src/utils.ts

@@ -1,20 +1,10 @@
-import {Letter as LetterData, Letter} from "../../pkg/word_grid";
 import * as React from "react";
-
-export enum CellType {
-    Normal = "Normal",
-    DoubleWord = "DoubleWord",
-    DoubleLetter = "DoubleLetter",
-    TripleLetter = "TripleLetter",
-    TripleWord = "TripleWord",
-    Start = "Start",
-}
+import {CellType, Letter as LetterData} from "./api";
 
 
 export interface Settings {
     trayLength: number;
     playerName: string;
-    aiName: string;
 }
 
 export enum LocationType {
@@ -68,7 +58,7 @@ export function matchCoordinate(playerLetters: PlayableLetterData[], coords: Coo
     for (let i=0; i<playerLetters.length; i++){
         let letter = playerLetters[i];
 
-        if (letter !== undefined && letter.location === coords.location && letter.index === coords.index) {
+        if (letter != null && letter.location === coords.location && letter.index === coords.index) {
             return i;
         }
     }
@@ -118,7 +108,7 @@ export function addNTimes<T>(array: T[], toAdd: T, times: number) {
     }
 }
 
-export function mergeTrays(existing: PlayableLetterData[], newer: (Letter | undefined)[]): PlayableLetterData[] {
+export function mergeTrays(existing: PlayableLetterData[], newer: (LetterData | null)[]): PlayableLetterData[] {
 
     let trayLength = Math.max(existing.length, newer.length);
 
@@ -129,7 +119,7 @@ export function mergeTrays(existing: PlayableLetterData[], newer: (Letter | unde
     }
 
     existing.filter((x) => {
-        return x !== undefined && x !== null;
+        return x != null;
     }).forEach((x) => {
         if (x.location === LocationType.TRAY) {
             freeSpots[x.index] = null;
@@ -148,9 +138,9 @@ export function mergeTrays(existing: PlayableLetterData[], newer: (Letter | unde
     }
 
     return newer.map((ld, i) => {
-        if (ld !== undefined) {
+        if (ld != null) {
 
-            if (existing[i] !== undefined && existing[i] !== null && existing[i].location === LocationType.TRAY) {
+            if (existing[i] != null && existing[i].location === LocationType.TRAY) {
                 ld["index"] = existing[i].index;
             } else {
                 ld["index"] = firstNotNull();

ui/src/wasm_api.tsx

@@ -0,0 +1,71 @@
+import {API, APIState, Difficulty, PlayedTile, Result, is_ok} from "./api";
+import {WasmAPI as RawAPI} from 'word_grid';
+
+export class WasmAPI implements API{
+    private wasm: RawAPI;
+
+    constructor(seed: bigint, dictionary_text: string, difficulty: Difficulty) {
+        this.wasm = new RawAPI(seed, dictionary_text, difficulty);
+    }
+
+    add_to_dictionary(word: string): Promise<APIState> {
+        return new Promise((resolve, reject) => {
+            let api_state: Result<APIState, any> = this.wasm.add_to_dictionary(word);
+
+            if(is_ok(api_state)) {
+                resolve(api_state.Ok);
+            } else {
+                reject(api_state.Err);
+            }
+        });
+    }
+
+    exchange(selection: Array<boolean>): Promise<APIState> {
+        return new Promise((resolve, reject) => {
+            let api_state: Result<APIState, any> = this.wasm.exchange(selection);
+
+            if(is_ok(api_state)) {
+                resolve(api_state.Ok);
+            } else {
+                reject(api_state.Err);
+            }
+        });
+    }
+
+    load(_wait: boolean): Promise<APIState> {
+        return new Promise((resolve, reject) => {
+            let api_state: Result<APIState, any> = this.wasm.load();
+
+            if(is_ok(api_state)) {
+                resolve(api_state.Ok);
+            } else {
+                reject(api_state.Err);
+            }
+        });
+    }
+
+    pass(): Promise<APIState> {
+        return new Promise((resolve, reject) => {
+            let api_state: Result<APIState, any> = this.wasm.pass();
+
+            if(is_ok(api_state)) {
+                resolve(api_state.Ok);
+            } else {
+                reject(api_state.Err);
+            }
+        });
+    }
+
+    play(tiles: Array<PlayedTile>, commit: boolean): Promise<APIState> {
+        return new Promise((resolve, reject) => {
+            let api_state: Result<APIState, any> = this.wasm.play(tiles, commit);
+
+            if(is_ok(api_state)) {
+                resolve(api_state.Ok);
+            } else {
+                reject(api_state.Err);
+            }
+        });
+    }
+
+}

ui/src/ws_api.tsx

@@ -0,0 +1,211 @@
+import {API, APIState, Difficulty, PlayedTile} from "./api";
+
+export interface Player {
+    name: string
+}
+
+export interface AI {
+    proportion: number
+    randomness: number
+}
+
+export interface PartyInfo {
+    ais: AI[]
+    players: Player[]
+}
+
+export type RoomEvent = {
+    type: "PlayerJoined" | "PlayerLeft"
+    player: Player
+} | {
+    type: "AIJoined",
+    difficulty: Difficulty
+} | {
+    type: "AILeft"
+    index: number
+}
+
+export type GameEvent = {
+    type: "TurnAction"
+    state: APIState
+    committed: boolean
+}
+
+export type ServerToClientMessage = {
+    type: "RoomChange"
+    event: RoomEvent
+    info: PartyInfo
+
+} | {
+    type: "GameEvent"
+    event: GameEvent
+} | {
+    type: "GameError"
+    error: any
+} | {
+    type: "Invalid"
+    reason: string
+}
+
+type GameMove = {
+    type: "Pass"
+} | {
+    type: "Exchange"
+    tiles: Array<boolean>
+} | {
+    type: "Play"
+    played_tiles: Array<PlayedTile>
+    commit_move: boolean
+} | {
+    type: "AddToDictionary"
+    word: string
+}
+
+export type ClientToServerMessage = {
+    type: "Load" | "StartGame"
+} | {
+    type: "GameMove"
+    move: GameMove
+} | {
+    type: "AddAI"
+    difficulty: Difficulty
+} | {
+    type: "RemoveAI"
+    index: number
+}
+
+interface PromiseInput {
+    resolve: (value: GameEvent) => void
+    reject: (error: any) => void
+    type: string // recorded for debug purposes
+}
+
+export class WSAPI implements API{
+    private socket: WebSocket;
+    private currentPromiseInput: PromiseInput | null;
+
+    constructor(socket: WebSocket) {
+        this.socket = socket;
+        this.currentPromiseInput = null;
+        this.socket.addEventListener("message", (event) => {
+            let data: ServerToClientMessage = JSON.parse(event.data);
+            console.log("Message from server ", event.data);
+            if(data.type == "GameEvent") {
+                if(this.currentPromiseInput != null) {
+                    this.currentPromiseInput.resolve(data.event);
+                    this.currentPromiseInput = null;
+                } else {
+                    console.error("Received game data but no promise is queued");
+                    console.error({data});
+                }
+            } else if(data.type == "GameError") {
+                if(this.currentPromiseInput != null) {
+                    this.currentPromiseInput.reject(data.error);
+                    this.currentPromiseInput = null;
+                } else {
+                    console.error("Received error game data but no promise is queued");
+                    console.error({data});
+                }
+            }
+
+        });
+    }
+
+    private register_promise(resolve: (value: GameEvent) => void, reject: (value: any) => void, type: string) {
+        const newPromise = {
+            resolve: resolve,
+            reject: reject,
+            type: type,
+        };
+
+        if(this.currentPromiseInput != null) {
+            console.error("We are setting a new promise before the current one has resolved")
+            console.error("Current promise: ", this.currentPromiseInput);
+            console.error("New promise: ", newPromise);
+
+            // Some of the rejects take statements from the server and log them; maybe don't send this to reject
+            //this.currentPromiseInput.reject("New promise was registered");
+        }
+        this.currentPromiseInput = newPromise;
+    }
+
+    add_to_dictionary(word: string): Promise<APIState> {
+        return new Promise((resolve, reject) => {
+            this.register_promise(resolve, reject, "AddToDictionary");
+            let event: ClientToServerMessage = {
+                type: "GameMove",
+                move: {
+                    type: "AddToDictionary",
+                    word
+                }
+            };
+            this.socket.send(JSON.stringify(event));
+
+        }).then((game_event: GameEvent) => {
+            return game_event.state;
+        });
+    }
+
+    exchange(selection: Array<boolean>): Promise<APIState> {
+        return new Promise((resolve, reject) => {
+            this.register_promise(resolve, reject, "Exchange");
+            let event: ClientToServerMessage = {
+                type: "GameMove",
+                move: {
+                    type: "Exchange",
+                    tiles: selection
+                }
+            };
+            this.socket.send(JSON.stringify(event));
+        }).then((game_event: GameEvent) => {
+            return game_event.state;
+        });
+    }
+
+    load(wait: boolean): Promise<APIState> {
+        return new Promise((resolve, reject) => {
+            this.register_promise(resolve, reject, `Load with wait=${wait}`);
+            if(!wait) {
+                let event: ClientToServerMessage = {
+                    type: "Load"
+                }
+                this.socket.send(JSON.stringify(event));
+            }
+        }).then((game_event: GameEvent) => {
+            return game_event.state;
+        });
+    }
+
+    pass(): Promise<APIState> {
+        return new Promise((resolve, reject) => {
+            this.register_promise(resolve, reject, "Pass");
+            let event: ClientToServerMessage = {
+                type: "GameMove",
+                move: {
+                    type: "Pass",
+                }
+            };
+            this.socket.send(JSON.stringify(event));
+        }).then((game_event: GameEvent) => {
+            return game_event.state;
+        });
+    }
+
+    play(tiles: Array<PlayedTile>, commit: boolean): Promise<APIState> {
+        return new Promise((resolve, reject) => {
+            this.register_promise(resolve, reject, "Play");
+            let event: ClientToServerMessage = {
+                type: "GameMove",
+                move: {
+                    type: "Play",
+                    played_tiles: tiles,
+                    commit_move: commit,
+                }
+            };
+            this.socket.send(JSON.stringify(event));
+        }).then((game_event: GameEvent) => {
+            return game_event.state;
+        });
+    }
+
+}

wasm/Cargo.lock

@@ -0,0 +1,289 @@
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wasm/Cargo.toml

@@ -0,0 +1,14 @@
+[package]
+name = "wasm"
+version = "0.1.0"
+edition = "2021"
+
+[lib]
+crate-type = ["cdylib"]
+
+[dependencies]
+serde-wasm-bindgen = "0.6.5"
+wasm-bindgen = "0.2.92"
+word_grid = { version = "0.1.0", path = "../wordgrid" }
+serde_json = { workspace = true }
+serde = { workspace = true }

wasm/src/lib.rs

@@ -0,0 +1,60 @@
+use wasm_bindgen::prelude::wasm_bindgen;
+use wasm_bindgen::JsValue;
+use word_grid::api::APIGame;
+use word_grid::game::{Game, PlayedTile};
+use word_grid::player_interaction::ai::Difficulty;
+
+const PLAYER_NAME: &str = "Player";
+
+#[wasm_bindgen]
+pub struct WasmAPI(APIGame);
+
+#[wasm_bindgen]
+impl WasmAPI {
+    #[wasm_bindgen(constructor)]
+    pub fn new(seed: u64, dictionary_text: &str, ai_difficulty: JsValue) -> Self {
+        let difficulty: Difficulty = serde_wasm_bindgen::from_value(ai_difficulty).unwrap();
+
+        let game = Game::new(
+            seed,
+            dictionary_text,
+            vec![PLAYER_NAME.to_string()],
+            vec![difficulty],
+        );
+
+        WasmAPI(APIGame::new(game))
+    }
+
+    pub fn exchange(&mut self, selection: JsValue) -> JsValue {
+        let selection: Vec<bool> = serde_wasm_bindgen::from_value(selection).unwrap();
+
+        let result = self.0.exchange(PLAYER_NAME, selection);
+
+        serde_wasm_bindgen::to_value(&result).unwrap()
+    }
+
+    pub fn pass(&mut self) -> JsValue {
+        let result = self.0.pass(PLAYER_NAME);
+
+        serde_wasm_bindgen::to_value(&result).unwrap()
+    }
+
+    pub fn load(&mut self) -> JsValue {
+        let result = self.0.load(PLAYER_NAME);
+        serde_wasm_bindgen::to_value(&result).unwrap()
+    }
+
+    pub fn play(&mut self, tray_tile_locations: JsValue, commit_move: bool) -> JsValue {
+        let tray_tile_locations: Vec<Option<PlayedTile>> =
+            serde_wasm_bindgen::from_value(tray_tile_locations).unwrap();
+
+        let result = self.0.play(PLAYER_NAME, tray_tile_locations, commit_move);
+        serde_wasm_bindgen::to_value(&result).unwrap()
+    }
+
+    pub fn add_to_dictionary(&mut self, word: &str) -> JsValue {
+        let result = self.0.add_to_dictionary(PLAYER_NAME, word);
+
+        serde_wasm_bindgen::to_value(&result).unwrap()
+    }
+}

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+ "proc-macro2",
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+ "wasm-bindgen-backend",
+ "wasm-bindgen-shared",
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+
+[[package]]
+name = "word_grid"
+version = "0.1.0"
+dependencies = [
+ "csv",
+ "getrandom",
+ "rand",
+ "serde",
+ "serde_json",
+]

wordgrid/Cargo.toml

@@ -0,0 +1,15 @@
+[package]
+name = "word_grid"
+version = "0.1.0"
+edition = "2021"
+authors = ["Joel Therrien"]
+repository = "https://git.joeltherrien.ca/joel/WordGrid"
+license = "AGPL-3"
+description = "A (WIP) package for playing 'WordGrid'."
+
+[dependencies]
+csv = "1.3.0"
+getrandom = {version = "0.2", features = ["js"]}
+serde_json = { workspace = true }
+serde = { workspace = true }
+rand = { workspace = true }

wordgrid/src/api.rs

@@ -0,0 +1,241 @@
+use crate::board::{CellType, Letter};
+use crate::game::{
+    Error, Game, GameState, PlayedTile, Player, PlayerState, TurnAction, TurnAdvanceResult,
+};
+use crate::player_interaction::Tray;
+use serde::{Deserialize, Serialize};
+
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub struct ApiPlayer {
+    name: String,
+    tray_tiles: usize,
+    score: u32,
+}
+
+impl ApiPlayer {
+    fn from(player_state: &PlayerState) -> ApiPlayer {
+        ApiPlayer {
+            name: player_state.player.get_name().to_string(),
+            tray_tiles: player_state.tray.count(),
+            score: player_state.score,
+        }
+    }
+}
+
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub struct Update {
+    r#type: TurnAction,
+    player: String,
+    turn_number: usize,
+}
+
+pub type ApiBoard = Vec<Option<Letter>>;
+
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub struct PublicInformation {
+    game_state: GameState,
+    board: ApiBoard,
+    cell_types: Vec<CellType>,
+    current_player: String,
+    players: Vec<ApiPlayer>,
+    remaining_tiles: usize,
+    history: Vec<Update>,
+    current_turn_number: usize,
+}
+
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub struct ApiState {
+    public_information: PublicInformation,
+    tray: Tray,
+    pub update: Option<Update>,
+}
+
+pub struct APIGame(pub Game, Vec<Update>);
+
+impl APIGame {
+    pub fn new(game: Game) -> APIGame {
+        APIGame(game, vec![])
+    }
+
+    fn is_players_turn(&self, player: &str) -> bool {
+        self.0.current_player_name().eq(player)
+    }
+
+    fn player_exists(&self, player: &str) -> bool {
+        self.0.player_states.get_player_state(player).is_some()
+    }
+
+    fn player_exists_and_turn(&self, player: &str) -> Result<(), Error> {
+        if !self.player_exists(&player) {
+            Err(Error::InvalidPlayer(player.to_string()))
+        } else if !self.is_players_turn(&player) {
+            Err(Error::WrongTurn(player.to_string()))
+        } else {
+            Ok(())
+        }
+    }
+
+    fn build_result(
+        &self,
+        tray: Tray,
+        game_state: Option<GameState>,
+        update: Option<Update>,
+    ) -> ApiState {
+        ApiState {
+            public_information: self.build_public_information(game_state, &self.1),
+            tray,
+            update,
+        }
+    }
+
+    fn build_public_information(
+        &self,
+        game_state: Option<GameState>,
+        history: &Vec<Update>,
+    ) -> PublicInformation {
+        let game_state = game_state.unwrap_or_else(|| self.0.get_state());
+
+        let cell_types = self
+            .0
+            .get_board()
+            .cells
+            .iter()
+            .map(|cell| -> CellType { cell.cell_type })
+            .collect::<Vec<CellType>>();
+
+        let board: Vec<Option<Letter>> = self
+            .0
+            .get_board()
+            .cells
+            .iter()
+            .map(|cell| -> Option<Letter> { cell.value.clone() })
+            .collect();
+
+        let players = self
+            .0
+            .player_states
+            .0
+            .iter()
+            .map(|p| ApiPlayer::from(p))
+            .collect::<Vec<ApiPlayer>>();
+
+        PublicInformation {
+            game_state,
+            board,
+            cell_types,
+            current_player: self.0.current_player_name(),
+            players,
+            remaining_tiles: self.0.get_remaining_tiles(),
+            history: history.clone(),
+            current_turn_number: self.0.get_number_turns(),
+        }
+    }
+
+    pub fn exchange(&mut self, player: &str, tray_tiles: Vec<bool>) -> Result<ApiState, Error> {
+        self.player_exists_and_turn(player)?;
+
+        let turn_number = self.0.get_number_turns();
+
+        let (tray, turn_action, game_state) = self.0.exchange_tiles(tray_tiles)?;
+        let update = Update {
+            r#type: turn_action,
+            player: player.to_string(),
+            turn_number,
+        };
+
+        self.1.push(update.clone());
+
+        Ok(self.build_result(tray, Some(game_state), Some(update)))
+    }
+
+    pub fn pass(&mut self, player: &str) -> Result<ApiState, Error> {
+        self.player_exists_and_turn(player)?;
+
+        let turn_number = self.0.get_number_turns();
+
+        let game_state = self.0.pass()?;
+        let tray = self.0.player_states.get_tray(player).unwrap().clone();
+        let update = Update {
+            r#type: TurnAction::Pass,
+            player: player.to_string(),
+            turn_number,
+        };
+        self.1.push(update.clone());
+
+        Ok(self.build_result(tray, Some(game_state), Some(update)))
+    }
+
+    pub fn load(&mut self, player: &str) -> Result<ApiState, Error> {
+        if !self.player_exists(player) {
+            Err(Error::InvalidPlayer(player.to_string()))
+        } else {
+            while self.is_ai_turn() {
+                let turn_number = self.0.get_number_turns();
+                let (result, _) = self.0.advance_turn()?;
+
+                if let TurnAdvanceResult::AIMove { name, action } = result {
+                    self.1.push(Update {
+                        r#type: action,
+                        player: name,
+                        turn_number,
+                    });
+                } else {
+                    unreachable!("We already checked that the current player is AI");
+                }
+            }
+
+            let tray = self.0.player_states.get_tray(player).unwrap().clone();
+            Ok(self.build_result(tray, None, None))
+        }
+    }
+
+    pub fn play(
+        &mut self,
+        player: &str,
+        tray_tile_locations: Vec<Option<PlayedTile>>,
+        commit_move: bool,
+    ) -> Result<ApiState, Error> {
+        self.player_exists_and_turn(&player)?;
+
+        let turn_number = self.0.get_number_turns();
+
+        let (turn_action, game_state) = self.0.receive_play(tray_tile_locations, commit_move)?;
+        let tray = self.0.player_states.get_tray(&player).unwrap().clone();
+        let update = Update {
+            r#type: turn_action,
+            player: player.to_string(),
+            turn_number,
+        };
+        if commit_move {
+            self.1.push(update.clone())
+        }
+
+        Ok(self.build_result(tray, Some(game_state), Some(update)))
+    }
+
+    pub fn add_to_dictionary(&mut self, player: &str, word: &str) -> Result<ApiState, Error> {
+        let word = word.to_uppercase();
+        self.0.add_word(&word);
+
+        let update = Update {
+            r#type: TurnAction::AddToDictionary { word },
+            player: player.to_string(),
+            turn_number: self.0.get_number_turns(),
+        };
+        self.1.push(update.clone());
+        let tray = self.0.player_states.get_tray(&player).unwrap().clone();
+        Ok(self.build_result(tray, None, Some(update)))
+    }
+
+    pub fn is_ai_turn(&self) -> bool {
+        let current_player = self.0.current_player_name();
+        matches!(
+            self.0
+                .player_states
+                .get_player_state(&current_player)
+                .unwrap()
+                .player,
+            Player::AI { .. }
+        )
+    }
+}

wordgrid/src/board.rs

@@ -1,32 +1,31 @@
+use crate::constants::{ALL_LETTERS_BONUS, GRID_LENGTH, TRAY_LENGTH};
+use crate::dictionary::DictionaryImpl;
+use crate::game::Error;
+use serde::{Deserialize, Serialize};
+use std::borrow::BorrowMut;
 use std::collections::HashSet;
 use std::fmt;
 use std::fmt::{Formatter, Write};
-use std::borrow::BorrowMut;
-use serde::{Deserialize, Serialize};
-use tsify::Tsify;
-use crate::constants::{ALL_LETTERS_BONUS, GRID_LENGTH, TRAY_LENGTH};
-use crate::dictionary::DictionaryImpl;
-
 
 #[derive(Clone, Copy)]
 pub enum Direction {
-    Row, Column
+    Row,
+    Column,
 }
 
 impl Direction {
     pub fn invert(&self) -> Self {
         match &self {
-            Direction::Row => {Direction::Column}
-            Direction::Column => {Direction::Row}
+            Direction::Row => Direction::Column,
+            Direction::Column => Direction::Row,
         }
     }
 }
 
 #[derive(Clone, Copy, Debug, Eq, PartialEq, Hash)]
-pub struct Coordinates (pub u8, pub u8);
+pub struct Coordinates(pub u8, pub u8);
 
 impl Coordinates {
-
     pub fn new_from_index(index: usize) -> Self {
         let y = index / GRID_LENGTH as usize;
         let x = index % GRID_LENGTH as usize;
@@ -36,32 +35,35 @@ impl Coordinates {
 
     fn add(&self, direction: Direction, i: i8) -> Option<Self> {
         let proposed = match direction {
-            Direction::Column => {(self.0 as i8, self.1 as i8+i)}
-            Direction::Row => {(self.0 as i8+i, self.1 as i8)}
+            Direction::Column => (self.0 as i8, self.1 as i8 + i),
+            Direction::Row => (self.0 as i8 + i, self.1 as i8),
         };
 
-        if proposed.0 < 0 || proposed.0 >= GRID_LENGTH as i8 || proposed.1 < 0 || proposed.1 >= GRID_LENGTH as i8 {
+        if proposed.0 < 0
+            || proposed.0 >= GRID_LENGTH as i8
+            || proposed.1 < 0
+            || proposed.1 >= GRID_LENGTH as i8
+        {
             None
-        } else{
+        } else {
             Some(Coordinates(proposed.0 as u8, proposed.1 as u8))
         }
     }
 
-    pub fn increment(&self, direction: Direction) -> Option<Self>{
+    pub fn increment(&self, direction: Direction) -> Option<Self> {
         self.add(direction, 1)
     }
 
-    pub fn decrement(&self, direction: Direction) -> Option<Self>{
+    pub fn decrement(&self, direction: Direction) -> Option<Self> {
         self.add(direction, -1)
     }
 
     pub fn map_to_index(&self) -> usize {
-        (self.0 + GRID_LENGTH*self.1) as usize
+        (self.0 + GRID_LENGTH * self.1) as usize
     }
 }
 
-#[derive(Debug, Copy, Clone, Serialize, Deserialize, Tsify, PartialEq, Eq, Hash)]
-#[tsify(from_wasm_abi)]
+#[derive(Debug, Copy, Clone, Serialize, Deserialize, PartialEq, Eq, Hash)]
 pub struct Letter {
     pub text: char,
     pub points: u32,
@@ -81,32 +83,27 @@ impl Letter {
 
     pub fn new(text: Option<char>, points: u32) -> Letter {
         match text {
-            None => {
-                Letter {
+            None => Letter {
                 text: ' ',
                 points,
                 ephemeral: true,
                 is_blank: true,
-                }
-            }
-            Some(text) => {
-                Letter {
+            },
+            Some(text) => Letter {
                 text,
                 points,
                 ephemeral: true,
                 is_blank: false,
-                }
-            }
+            },
         }
     }
 
     pub fn partial_match(&self, other: &Letter) -> bool {
         self == other || (self.is_blank && other.is_blank && self.points == other.points)
     }
-
 }
 
-#[derive(Debug, Copy, Clone, Serialize)]
+#[derive(Debug, Copy, Clone, Serialize, Deserialize)]
 pub enum CellType {
     Normal,
     DoubleWord,
@@ -141,28 +138,25 @@ impl<'a> ToString for Word<'a> {
         }
 
         text
-
     }
 }
 
-impl <'a> Word<'a> {
-
-    pub fn calculate_score(&self) -> u32{
+impl<'a> Word<'a> {
+    pub fn calculate_score(&self) -> u32 {
         let mut multiplier = 1;
         let mut unmultiplied_score = 0;
 
         for cell in self.cells.as_slice() {
             let cell_value = cell.value.unwrap();
             if cell_value.ephemeral {
-                let cell_multiplier =
-                    match cell.cell_type {
-                        CellType::Normal => {1}
+                let cell_multiplier = match cell.cell_type {
+                    CellType::Normal => 1,
                     CellType::DoubleWord => {
                         multiplier *= 2;
                         1
                     }
-                        CellType::DoubleLetter => {2}
-                        CellType::TripleLetter => {3}
+                    CellType::DoubleLetter => 2,
+                    CellType::TripleLetter => 3,
                     CellType::TripleWord => {
                         multiplier *= 3;
                         1
@@ -187,7 +181,6 @@ impl Board {
     pub fn new() -> Self {
         let mut cells = Vec::new();
 
-
         /// Since the board is symmetrical in both directions for the purposes of our logic we can keep our coordinates in one corner
         ///
         /// # Arguments
@@ -200,7 +193,7 @@ impl Board {
                 GRID_LENGTH - x - 1
             } else {
                 x
-            }
+            };
         }
 
         for i_orig in 0..GRID_LENGTH {
@@ -221,12 +214,10 @@ impl Board {
                 }
 
                 // Double letters
-                if (i % 4 == 2) && (j % 4 == 2) && !(
-                    i == 2 && j == 2
-                ) {
+                if (i % 4 == 2) && (j % 4 == 2) && !(i == 2 && j == 2) {
                     typee = CellType::DoubleLetter;
                 }
-                if (i.min(j) == 0 && i.max(j) == 3) || (i.min(j)==3 && i.max(j) == 7) {
+                if (i.min(j) == 0 && i.max(j) == 3) || (i.min(j) == 3 && i.max(j) == 7) {
                     typee = CellType::DoubleLetter;
                 }
 
@@ -245,11 +236,10 @@ impl Board {
                     value: None,
                     coordinates: Coordinates(j_orig, i_orig),
                 })
-
             }
         }
 
-        Board {cells}
+        Board { cells }
     }
 
     pub fn get_cell(&self, coordinates: Coordinates) -> Result<&Cell, &str> {
@@ -261,24 +251,28 @@ impl Board {
         }
     }
 
-    pub fn get_cell_mut(&mut self, coordinates: Coordinates) -> Result<&mut Cell, &str> {
+    pub fn get_cell_mut(&mut self, coordinates: Coordinates) -> Result<&mut Cell, Error> {
         if coordinates.0 >= GRID_LENGTH || coordinates.1 >= GRID_LENGTH {
-            Err("x & y must be within the board's coordinates")
+            Err(Error::Other(
+                "x & y must be within the board's coordinates".to_string(),
+            ))
         } else {
             let index = coordinates.map_to_index();
             Ok(self.cells.get_mut(index).unwrap())
         }
     }
 
-
-    pub fn calculate_scores(&self, dictionary: &DictionaryImpl) -> Result<(Vec<(Word, u32)>, u32), String> {
+    pub fn calculate_scores(
+        &self,
+        dictionary: &DictionaryImpl,
+    ) -> Result<(Vec<(Word, u32)>, u32), Error> {
         let (words, tiles_played) = self.find_played_words()?;
         let mut words_and_scores = Vec::new();
         let mut total_score = 0;
 
         for word in words {
             if !dictionary.contains_key(&word.to_string()) {
-                return Err(format!("{} is not a valid word", word.to_string()));
+                return Err(Error::InvalidWord(word.to_string()));
             }
 
             let score = word.calculate_score();
@@ -293,10 +287,9 @@ impl Board {
         Ok((words_and_scores, total_score))
     }
 
-    pub fn find_played_words(&self) -> Result<(Vec<Word>, u8), &str> {
+    pub fn find_played_words(&self) -> Result<(Vec<Word>, u8), Error> {
         // We don't assume that the move is valid, so let's first establish that
 
-
         // Let's first establish what rows and columns tiles were played in
         let mut rows_played = HashSet::with_capacity(15);
         let mut columns_played = HashSet::with_capacity(15);
@@ -320,9 +313,9 @@ impl Board {
         }
 
         if rows_played.is_empty() {
-            return Err("Tiles need to be played")
+            return Err(Error::NoTilesPlayed);
         } else if rows_played.len() > 1 && columns_played.len() > 1 {
-            return Err("Tiles need to be played on one row or column")
+            return Err(Error::TilesNotStraight);
         }
 
         let direction = if rows_played.len() > 1 {
@@ -335,7 +328,9 @@ impl Board {
         let starting_column = *columns_played.iter().min().unwrap();
 
         let starting_coords = Coordinates(starting_row, starting_column);
-        let main_word = self.find_word_at_position(starting_coords, direction).unwrap();
+        let main_word = self
+            .find_word_at_position(starting_coords, direction)
+            .unwrap();
 
         let mut words = Vec::new();
         let mut observed_tiles_played = 0;
@@ -359,25 +354,25 @@ impl Board {
 
         // there are tiles not part of the main word
         if observed_tiles_played != tiles_played {
-            return Err("Played tiles cannot have empty gap");
+            return Err(Error::TilesHaveGap);
         }
 
         // don't want the case of a single letter word
         if main_word.cells.len() > 1 {
             words.push(main_word);
         } else if words.is_empty() {
-            return Err("All words must be at least one letter");
+            return Err(Error::OneLetterWord);
         }
 
-
-
-
         // need to verify that the play is 'anchored'
         let mut anchored = false;
         'outer: for word in words.as_slice() {
             for cell in word.cells.as_slice() {
                 // either one of the letters
-                if !cell.value.as_ref().unwrap().ephemeral || (cell.coordinates.0 == GRID_LENGTH / 2 && cell.coordinates.1 == GRID_LENGTH / 2){
+                if !cell.value.as_ref().unwrap().ephemeral
+                    || (cell.coordinates.0 == GRID_LENGTH / 2
+                        && cell.coordinates.1 == GRID_LENGTH / 2)
+                {
                     anchored = true;
                     break 'outer;
                 }
@@ -387,23 +382,27 @@ impl Board {
         if anchored {
             Ok((words, tiles_played))
         } else {
-            return Err("Played tiles must be anchored to something")
+            Err(Error::UnanchoredWord)
         }
     }
 
-    pub fn find_word_at_position(&self, mut start_coords: Coordinates, direction: Direction) -> Option<Word> {
+    pub fn find_word_at_position(
+        &self,
+        mut start_coords: Coordinates,
+        direction: Direction,
+    ) -> Option<Word> {
         // let's see how far we can backtrack to the start of the word
         let mut times_moved = 0;
         loop {
             let one_back = start_coords.add(direction, -times_moved);
             match one_back {
-                None => { break }
+                None => break,
                 Some(new_coords) => {
                     let cell = self.get_cell(new_coords).unwrap();
-                    if cell.value.is_some(){
+                    if cell.value.is_some() {
                         times_moved += 1;
                     } else {
-                        break
+                        break;
                     }
                 }
             }
@@ -423,11 +422,11 @@ impl Board {
         loop {
             let position = start_coords.add(direction, cells.len() as i8);
             match position {
-                None => {break}
+                None => break,
                 Some(x) => {
                     let cell = self.get_cell(x).unwrap();
                     match cell.value {
-                        None => {break}
+                        None => break,
                         Some(_) => {
                             cells.push(cell);
                         }
@@ -442,16 +441,16 @@ impl Board {
         })
     }
 
-    pub fn receive_play(&mut self, play: Vec<(Letter, Coordinates)>) -> Result<(), String> {
+    pub fn receive_play(&mut self, play: Vec<(Letter, Coordinates)>) -> Result<(), Error> {
         for (mut letter, coords) in play {
             {
-                let cell = match self.get_cell_mut(coords) {
-                    Ok(cell) => {cell}
-                    Err(e) => {return Err(e.to_string())}
-                };
+                let cell = self.get_cell_mut(coords)?;
 
                 if cell.value.is_some() {
-                    return Err(format!("There's already a letter at {:?}", coords));
+                    return Err(Error::Other(format!(
+                        "There's already a letter at {:?}",
+                        coords
+                    )));
                 }
 
                 letter.ephemeral = true;
@@ -476,7 +475,6 @@ impl Board {
 
 impl fmt::Display for Board {
     fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
-
         let mut str = String::new();
 
         let normal = "\x1b[48;5;174m\x1b[38;5;0m";
@@ -493,57 +491,82 @@ impl fmt::Display for Board {
                 let cell = self.get_cell(coords).unwrap();
 
                 let color = match cell.cell_type {
-                    CellType::Normal => {normal}
-                    CellType::DoubleWord => {double_word}
-                    CellType::DoubleLetter => {double_letter}
-                    CellType::TripleLetter => {triple_letter}
-                    CellType::TripleWord => {triple_word}
-                    CellType::Start => {double_word}
+                    CellType::Normal => normal,
+                    CellType::DoubleWord => double_word,
+                    CellType::DoubleLetter => double_letter,
+                    CellType::TripleLetter => triple_letter,
+                    CellType::TripleWord => triple_word,
+                    CellType::Start => double_word,
                 };
 
                 let content = match &cell.value {
-                    None => {' '}
-                    Some(letter) => {letter.text}
+                    None => ' ',
+                    Some(letter) => letter.text,
                 };
 
-
                 str.write_str(color).unwrap();
                 str.write_char(content).unwrap();
-
-
             }
             str.write_str("\x1b[0m\n").unwrap();
         }
 
         write!(f, "{}", str)
-
     }
 }
 
 #[cfg(test)]
 mod tests {
-    use crate::dictionary::Dictionary;
     use super::*;
+    use crate::dictionary::Dictionary;
 
     #[test]
     fn test_cell_types() {
         let board = Board::new();
 
-        assert!(matches!(board.get_cell(Coordinates(0, 0)).unwrap().cell_type, CellType::TripleWord));
-        assert!(matches!(board.get_cell(Coordinates(1, 0)).unwrap().cell_type, CellType::Normal));
-        assert!(matches!(board.get_cell(Coordinates(0, 1)).unwrap().cell_type, CellType::Normal));
-        assert!(matches!(board.get_cell(Coordinates(1, 1)).unwrap().cell_type, CellType::DoubleWord));
+        assert!(matches!(
+            board.get_cell(Coordinates(0, 0)).unwrap().cell_type,
+            CellType::TripleWord
+        ));
+        assert!(matches!(
+            board.get_cell(Coordinates(1, 0)).unwrap().cell_type,
+            CellType::Normal
+        ));
+        assert!(matches!(
+            board.get_cell(Coordinates(0, 1)).unwrap().cell_type,
+            CellType::Normal
+        ));
+        assert!(matches!(
+            board.get_cell(Coordinates(1, 1)).unwrap().cell_type,
+            CellType::DoubleWord
+        ));
 
-        assert!(matches!(board.get_cell(Coordinates(13, 13)).unwrap().cell_type, CellType::DoubleWord));
-        assert!(matches!(board.get_cell(Coordinates(14, 14)).unwrap().cell_type, CellType::TripleWord));
-        assert!(matches!(board.get_cell(Coordinates(11, 14)).unwrap().cell_type, CellType::DoubleLetter));
+        assert!(matches!(
+            board.get_cell(Coordinates(13, 13)).unwrap().cell_type,
+            CellType::DoubleWord
+        ));
+        assert!(matches!(
+            board.get_cell(Coordinates(14, 14)).unwrap().cell_type,
+            CellType::TripleWord
+        ));
+        assert!(matches!(
+            board.get_cell(Coordinates(11, 14)).unwrap().cell_type,
+            CellType::DoubleLetter
+        ));
 
-        assert!(matches!(board.get_cell(Coordinates(7, 7)).unwrap().cell_type, CellType::Start));
-        assert!(matches!(board.get_cell(Coordinates(8, 6)).unwrap().cell_type, CellType::DoubleLetter));
-        assert!(matches!(board.get_cell(Coordinates(5, 9)).unwrap().cell_type, CellType::TripleLetter));
+        assert!(matches!(
+            board.get_cell(Coordinates(7, 7)).unwrap().cell_type,
+            CellType::Start
+        ));
+        assert!(matches!(
+            board.get_cell(Coordinates(8, 6)).unwrap().cell_type,
+            CellType::DoubleLetter
+        ));
+        assert!(matches!(
+            board.get_cell(Coordinates(5, 9)).unwrap().cell_type,
+            CellType::TripleLetter
+        ));
     }
 
-
     #[test]
     fn test_cell_coordinates() {
         let board = Board::new();
@@ -576,7 +599,6 @@ mod tests {
         board.get_cell_mut(Coordinates(5, 0)).unwrap().value = Some(Letter::new_fixed('O', 0));
         board.get_cell_mut(Coordinates(6, 0)).unwrap().value = Some(Letter::new_fixed('L', 0));
 
-
         board.get_cell_mut(Coordinates(9, 8)).unwrap().value = Some(Letter::new_fixed('G', 0));
         board.get_cell_mut(Coordinates(10, 8)).unwrap().value = Some(Letter::new_fixed('G', 0));
 
@@ -584,7 +606,9 @@ mod tests {
             println!("x is {}", x);
             let first_word = board.find_word_at_position(Coordinates(8, x), Direction::Column);
             match first_word {
-                None => { panic!("Expected to find word JOEL") }
+                None => {
+                    panic!("Expected to find word JOEL")
+                }
                 Some(x) => {
                     assert_eq!(x.coords.0, 8);
                     assert_eq!(x.coords.1, 6);
@@ -596,7 +620,9 @@ mod tests {
 
         let single_letter_word = board.find_word_at_position(Coordinates(8, 9), Direction::Row);
         match single_letter_word {
-            None => { panic!("Expected to find letter L") }
+            None => {
+                panic!("Expected to find letter L")
+            }
             Some(x) => {
                 assert_eq!(x.coords.0, 8);
                 assert_eq!(x.coords.1, 9);
@@ -609,7 +635,9 @@ mod tests {
             println!("x is {}", x);
             let word = board.find_word_at_position(Coordinates(x, 0), Direction::Row);
             match word {
-                None => { panic!("Expected to find word IS") }
+                None => {
+                    panic!("Expected to find word IS")
+                }
                 Some(x) => {
                     assert_eq!(x.coords.0, 0);
                     assert_eq!(x.coords.1, 0);
@@ -623,7 +651,9 @@ mod tests {
             println!("x is {}", x);
             let word = board.find_word_at_position(Coordinates(x, 0), Direction::Row);
             match word {
-                None => { panic!("Expected to find word COOL") }
+                None => {
+                    panic!("Expected to find word COOL")
+                }
                 Some(x) => {
                     assert_eq!(x.coords.0, 3);
                     assert_eq!(x.coords.1, 0);
@@ -638,7 +668,9 @@ mod tests {
 
         let word = board.find_word_at_position(Coordinates(10, 8), Direction::Row);
         match word {
-            None => { panic!("Expected to find word EGG") }
+            None => {
+                panic!("Expected to find word EGG")
+            }
             Some(x) => {
                 assert_eq!(x.coords.0, 8);
                 assert_eq!(x.coords.1, 8);
@@ -659,10 +691,10 @@ mod tests {
             is_blank: false,
         });
 
-        match board.find_played_words() {
-            Ok(_) => {panic!("Expected error")}
-            Err(e) => {assert_eq!(e, "All words must be at least one letter");}
-        }
+        assert!(matches!(
+            board.find_played_words(),
+            Err(Error::OneLetterWord)
+        ));
 
         board.get_cell_mut(Coordinates(7, 7)).unwrap().value = Some(Letter {
             text: 'I',
@@ -726,10 +758,7 @@ mod tests {
         board.get_cell_mut(Coordinates(8, 9)).unwrap().value = Some(make_letter('L', true));
 
         let words = board.find_played_words();
-        match words {
-            Ok(_) => {panic!("Expected the not-anchored error")}
-            Err(x) => {assert_eq!(x, "Played tiles must be anchored to something")}
-        }
+        assert!(matches!(words, Err(Error::UnanchoredWord)));
 
         // Adding anchor
         board.get_cell_mut(Coordinates(7, 6)).unwrap().value = Some(make_letter('I', false));
@@ -746,7 +775,6 @@ mod tests {
         assert!(board.find_played_words().is_ok());
     }
 
-
     #[test]
     fn test_word_finding_with_break() {
         // Verify that if I play my tiles on one row or column but with a break in-between I get an error
@@ -765,21 +793,14 @@ mod tests {
         board.get_cell_mut(Coordinates(8, 6)).unwrap().value = Some(Letter::new_fixed('J', 0));
         board.get_cell_mut(Coordinates(8, 7)).unwrap().value = Some(make_letter('O', true));
         board.get_cell_mut(Coordinates(8, 8)).unwrap().value = Some(make_letter('E', true));
-        board.get_cell_mut(Coordinates(8, 9)).unwrap().value = Some(Letter::new_fixed( 'L', 0));
+        board.get_cell_mut(Coordinates(8, 9)).unwrap().value = Some(Letter::new_fixed('L', 0));
 
         board.get_cell_mut(Coordinates(8, 11)).unwrap().value = Some(make_letter('I', true));
         board.get_cell_mut(Coordinates(8, 12)).unwrap().value = Some(Letter::new_fixed('S', 0));
 
         let words = board.find_played_words();
-        match words {
-            Ok(_) => {panic!("Expected to find an error!")}
-            Err(x) => {
-                assert_eq!(x, "Played tiles cannot have empty gap")
+        assert!(matches!(words, Err(Error::TilesHaveGap)));
     }
-        }
-
-    }
-
 
     #[test]
     fn test_word_finding_whole_board() {
@@ -795,15 +816,12 @@ mod tests {
         }
 
         let words = board.find_played_words();
-        match words {
-            Ok(_) => {panic!("Expected to find no words")}
-            Err(x) => {assert_eq!(x, "Tiles need to be played")}
-        }
+        assert!(matches!(words, Err(Error::NoTilesPlayed)));
 
         board.get_cell_mut(Coordinates(8, 6)).unwrap().value = Some(Letter::new_fixed('J', 8));
         board.get_cell_mut(Coordinates(8, 7)).unwrap().value = Some(make_letter('O', true, 1));
         board.get_cell_mut(Coordinates(8, 8)).unwrap().value = Some(make_letter('E', true, 1));
-        board.get_cell_mut(Coordinates(8, 9)).unwrap().value = Some(Letter::new_fixed( 'L', 1));
+        board.get_cell_mut(Coordinates(8, 9)).unwrap().value = Some(Letter::new_fixed('L', 1));
 
         board.get_cell_mut(Coordinates(0, 0)).unwrap().value = Some(Letter::new_fixed('I', 1));
         board.get_cell_mut(Coordinates(1, 0)).unwrap().value = Some(Letter::new_fixed('S', 1));
@@ -814,7 +832,7 @@ mod tests {
         board.get_cell_mut(Coordinates(6, 0)).unwrap().value = Some(Letter::new_fixed('L', 1));
 
         fn check_board(board: &mut Board, inverted: bool) {
-            let dictionary = DictionaryImpl::create_from_path("resources/dictionary.csv");
+            let dictionary = DictionaryImpl::create_from_path("../resources/dictionary.csv");
             println!("{}", board);
             let words = board.find_played_words();
             match words {
@@ -827,7 +845,9 @@ mod tests {
 
                     assert_eq!(word.calculate_score(), 8 + 1 + 2 + 1);
                 }
-                Err(e) => { panic!("Expected to find a word to play; found error {}", e) }
+                Err(e) => {
+                    panic!("Expected to find a word to play; found error {}", e)
+                }
             }
 
             let maybe_invert = |coords: Coordinates| {
@@ -844,12 +864,21 @@ mod tests {
                 return direction;
             };
 
-            board.get_cell_mut(maybe_invert(Coordinates(9, 8))).unwrap().value = Some(Letter::new_fixed('G', 2));
-            board.get_cell_mut(maybe_invert(Coordinates(10, 8))).unwrap().value = Some(Letter::new_fixed('G', 2));
+            board
+                .get_cell_mut(maybe_invert(Coordinates(9, 8)))
+                .unwrap()
+                .value = Some(Letter::new_fixed('G', 2));
+            board
+                .get_cell_mut(maybe_invert(Coordinates(10, 8)))
+                .unwrap()
+                .value = Some(Letter::new_fixed('G', 2));
 
-            let word = board.find_word_at_position(Coordinates(8, 8), maybe_invert_direction(Direction::Row));
+            let word = board
+                .find_word_at_position(Coordinates(8, 8), maybe_invert_direction(Direction::Row));
             match word {
-                None => {panic!("Expected to find word EGG")}
+                None => {
+                    panic!("Expected to find word EGG")
+                }
                 Some(x) => {
                     assert_eq!(x.coords.0, 8);
                     assert_eq!(x.coords.1, 8);
@@ -857,7 +886,6 @@ mod tests {
                     assert_eq!(x.to_string(), "EGG");
                     assert_eq!(x.calculate_score(), 2 + 2 + 2);
                     assert!(dictionary.is_word_valid(&x));
-
                 }
             }
 
@@ -876,20 +904,29 @@ mod tests {
                     assert_eq!(word.calculate_score(), 8 + 1 + 2 + 1);
                     assert!(!dictionary.is_word_valid(word));
                 }
-                Err(e) => { panic!("Expected to find a word to play; found error {}", e) }
+                Err(e) => {
+                    panic!("Expected to find a word to play; found error {}", e)
+                }
             }
 
             let scores = board.calculate_scores(&dictionary);
             match scores {
-                Ok(_) => {panic!("Expected an error")}
-                Err(e) => {assert_eq!(e, "JOEL is not a valid word")}
+                Ok(_) => {
+                    panic!("Expected an error")
+                }
+                Err(e) => {
+                    if let Error::InvalidWord(w) = e {
+                        assert_eq!(w, "JOEL");
+                    } else {
+                        panic!("Expected an InvalidPlay error")
+                    }
+                }
             }
 
             let mut alt_dictionary = DictionaryImpl::new();
             alt_dictionary.insert("JOEL".to_string(), 0.5);
             alt_dictionary.insert("EGG".to_string(), 0.5);
 
-
             let scores = board.calculate_scores(&alt_dictionary);
             match scores {
                 Ok((words, total_score)) => {
@@ -906,18 +943,19 @@ mod tests {
 
                     assert_eq!(total_score, 18);
                 }
-                Err(e) => {panic!("Wasn't expecting to encounter error {e}")}
+                Err(e) => {
+                    panic!("Wasn't expecting to encounter error {e}")
+                }
             }
-
 
             // replace one of the 'G' in EGG with an ephemeral to trigger an error
-            board.get_cell_mut(maybe_invert(Coordinates(9, 8))).unwrap().value = Some(make_letter('G', true, 2));
+            board
+                .get_cell_mut(maybe_invert(Coordinates(9, 8)))
+                .unwrap()
+                .value = Some(make_letter('G', true, 2));
 
             let words = board.find_played_words();
-            match words {
-                Ok(_) => { panic!("Expected error as we played tiles in multiple rows and columns") }
-                Err(e) => { assert_eq!(e, "Tiles need to be played on one row or column") }
-            }
+            assert!(matches!(words, Err(Error::TilesNotStraight)));
         }
 
         // make a copy of the board now with x and y swapped
@@ -934,7 +972,6 @@ mod tests {
                         cell_new.value = Some(*x);
                     }
                 }
-
             }
         }
 
@@ -943,8 +980,5 @@ mod tests {
 
         println!("Checking inverted board");
         check_board(&mut inverted_board, true);
-
-
     }
-
 }

wordgrid/src/constants.rs

@@ -1,6 +1,6 @@
-use rand::prelude::SliceRandom;
-use rand::{Rng};
 use crate::board::Letter;
+use rand::prelude::SliceRandom;
+use rand::Rng;
 
 pub const GRID_LENGTH: u8 = 15;
 pub const TRAY_LENGTH: u8 = 7;
@@ -49,5 +49,4 @@ pub fn standard_tile_pool<R: Rng>(rng: Option<&mut R>) -> Vec<Letter> {
     }
 
     letters
-
 }

wordgrid/src/dictionary.rs

@@ -1,10 +1,9 @@
+use crate::board::Word;
+use csv::Reader;
 use std::collections::{HashMap, HashSet};
 use std::str::FromStr;
-use csv::Reader;
-use crate::board::Word;
 
 pub trait Dictionary {
-
     fn create_from_reader<T: std::io::Read>(reader: Reader<T>) -> Self;
     fn create_from_path(path: &str) -> Self;
     fn create_from_str(data: &str) -> Self;
@@ -14,8 +13,7 @@ pub trait Dictionary {
 }
 pub type DictionaryImpl = HashMap<String, f64>;
 
-impl Dictionary for DictionaryImpl{
-
+impl Dictionary for DictionaryImpl {
     fn create_from_reader<T: std::io::Read>(mut reader: Reader<T>) -> Self {
         let mut map = HashMap::new();
 
@@ -27,7 +25,6 @@ impl Dictionary for DictionaryImpl{
             let score = f64::from_str(score).unwrap();
 
             map.insert(word, score);
-
         }
 
         map
@@ -57,7 +54,6 @@ impl Dictionary for DictionaryImpl{
         }
 
         map
-
     }
 
     fn substring_set(&self) -> HashSet<&str> {
@@ -65,11 +61,10 @@ impl Dictionary for DictionaryImpl{
 
         for (word, _score) in self.iter() {
             for j in 0..word.len() {
-                for k in (j+1)..(word.len()+1) {
+                for k in (j + 1)..(word.len() + 1) {
                     set.insert(&word[j..k]);
                 }
             }
-
         }
 
         set
@@ -85,10 +80,9 @@ impl Dictionary for DictionaryImpl{
 mod tests {
     use super::*;
 
-
     #[test]
     fn test_dictionary() {
-        let dictionary = HashMap::create_from_path("resources/dictionary.csv");
+        let dictionary = HashMap::create_from_path("../resources/dictionary.csv");
 
         assert_eq!(dictionary.len(), 279429);
 
@@ -96,7 +90,6 @@ mod tests {
         assert!(dictionary.contains_key("AARDVARK"));
 
         assert!((dictionary.get("AARDVARK").unwrap() - 0.5798372).abs() < 0.0001)
-
     }
 
     #[test]
@@ -131,11 +124,8 @@ mod tests {
         assert!(set.contains("JOH"));
         assert!(set.contains("OHN"));
 
-
         assert!(!set.contains("XY"));
         assert!(!set.contains("JH"));
         assert!(!set.contains("JE"));
-
     }
-
 }

wordgrid/src/game.rs

@@ -1,31 +1,90 @@
 use std::collections::HashMap;
+use std::fmt::{Display, Formatter};
 
-use rand::prelude::SliceRandom;
-use rand::rngs::SmallRng;
-use rand::SeedableRng;
-use serde::{Deserialize, Serialize};
-use tsify::Tsify;
 use crate::board::{Board, Coordinates, Letter};
 use crate::constants::{standard_tile_pool, TRAY_LENGTH};
 use crate::dictionary::{Dictionary, DictionaryImpl};
-use crate::player_interaction::ai::{AI, CompleteMove, Difficulty};
+use crate::player_interaction::ai::{Difficulty, AI};
 use crate::player_interaction::Tray;
+use rand::prelude::SliceRandom;
+use rand::rngs::SmallRng;
+use rand::SeedableRng;
+use serde::{Deserialize, Serialize, Serializer};
 
 pub enum Player {
     Human(String),
-    AI{
+    AI {
         name: String,
         difficulty: Difficulty,
         object: AI,
+    },
+}
+
+#[derive(Debug, Clone)]
+pub enum Error {
+    InvalidPlayer(String),
+    WrongTurn(String),
+    Other(String),
+    InvalidWord(String),
+    GameFinished,
+    NoTilesPlayed,
+    TilesNotStraight,
+    TilesHaveGap,
+    OneLetterWord,
+    UnanchoredWord,
+}
+
+impl Display for Error {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        match &self {
+            Error::InvalidPlayer(player) => {
+                write!(f, "{player} doesn't exist")
+            }
+            Error::WrongTurn(player) => {
+                write!(f, "It's not {player}'s turn")
+            }
+            Error::Other(msg) => {
+                write!(f, "Other error: {msg}")
+            }
+            Error::InvalidWord(word) => {
+                write!(f, "{word} is not a valid word")
+            }
+            Error::GameFinished => {
+                write!(f, "Moves cannot be made after a game has finished")
+            }
+            Error::NoTilesPlayed => {
+                write!(f, "Tiles need to be played")
+            }
+            Error::TilesNotStraight => {
+                write!(f, "Tiles need to be played on one row or column")
+            }
+            Error::TilesHaveGap => {
+                write!(f, "Played tiles cannot have empty gap")
+            }
+            Error::OneLetterWord => {
+                write!(f, "All words must be at least two letters")
+            }
+            Error::UnanchoredWord => {
+                write!(f, "Played tiles must be anchored to something")
+            }
+        }
+    }
+}
+
+impl Serialize for Error {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        serializer.serialize_str(&self.to_string())
     }
 }
 
 impl Player {
-
     pub fn get_name(&self) -> &str {
         match &self {
-            Player::Human(name) => {name}
-            Player::AI { name, .. } => {name}
+            Player::Human(name) => name,
+            Player::AI { name, .. } => name,
         }
     }
 }
@@ -33,18 +92,20 @@ impl Player {
 pub struct PlayerState {
     pub player: Player,
     pub score: u32,
-    pub tray: Tray
+    pub tray: Tray,
 }
 
-#[derive(Deserialize, Tsify, Copy, Clone, Debug)]
-#[tsify(from_wasm_abi)]
+#[derive(Deserialize, Copy, Clone, Debug)]
 pub struct PlayedTile {
     pub index: usize,
     pub character: Option<char>, // we only set this if PlayedTile is a blank
 }
 
 impl PlayedTile {
-    pub fn convert_tray(tray_tile_locations: &Vec<Option<PlayedTile>>, tray: &Tray) -> Vec<(Letter, Coordinates)> {
+    pub fn convert_tray(
+        tray_tile_locations: &Vec<Option<PlayedTile>>,
+        tray: &Tray,
+    ) -> Vec<(Letter, Coordinates)> {
         let mut played_letters: Vec<(Letter, Coordinates)> = Vec::new();
         for (i, played_tile) in tray_tile_locations.iter().enumerate() {
             if played_tile.is_some() {
@@ -55,7 +116,9 @@ impl PlayedTile {
                 if letter.is_blank {
                     match played_tile.character {
                         None => {
-                            panic!("You can't play a blank character without providing a letter value")
+                            panic!(
+                                "You can't play a blank character without providing a letter value"
+                            )
                         }
                         Some(x) => {
                             // TODO - check that x is a valid alphabet letter
@@ -64,7 +127,6 @@ impl PlayedTile {
                     }
                 }
                 played_letters.push((letter, coord));
-
             }
         }
 
@@ -72,15 +134,13 @@ impl PlayedTile {
     }
 }
 
-#[derive(Debug, Serialize, Deserialize, Tsify)]
-#[tsify(from_wasm_abi)]
+#[derive(Clone, Debug, Serialize, Deserialize)]
 pub struct WordResult {
     word: String,
     score: u32,
 }
 
-#[derive(Debug, Serialize, Deserialize, Tsify)]
-#[tsify(from_wasm_abi)]
+#[derive(Clone, Debug, Serialize, Deserialize)]
 pub struct ScoreResult {
     words: Vec<WordResult>,
     total: u32,
@@ -88,7 +148,6 @@ pub struct ScoreResult {
 
 pub struct PlayerStates(pub Vec<PlayerState>);
 impl PlayerStates {
-
     fn get_player_name_by_turn_id(&self, id: usize) -> &str {
         let id_mod = id % self.0.len();
         let state = self.0.get(id_mod).unwrap();
@@ -97,37 +156,33 @@ impl PlayerStates {
     }
 
     pub fn get_player_state(&self, name: &str) -> Option<&PlayerState> {
-        self.0.iter()
+        self.0
+            .iter()
             .filter(|state| state.player.get_name().eq(name))
             .nth(0)
-
     }
 
     pub fn get_player_state_mut(&mut self, name: &str) -> Option<&mut PlayerState> {
-        self.0.iter_mut()
+        self.0
+            .iter_mut()
             .filter(|state| state.player.get_name().eq(name))
             .nth(0)
-
     }
 
     pub fn get_tray(&self, name: &str) -> Option<&Tray> {
         let player = self.get_player_state(name)?;
 
         Some(&player.tray)
-
     }
 
     pub fn get_tray_mut(&mut self, name: &str) -> Option<&mut Tray> {
         let player = self.get_player_state_mut(name)?;
 
         Some(&mut player.tray)
-
     }
 }
 
-
-#[derive(Deserialize, Serialize, Tsify, Debug, Clone)]
-#[tsify(from_wasm_abi)]
+#[derive(Deserialize, Serialize, Debug, Clone)]
 #[serde(tag = "type")]
 pub enum GameState {
     InProgress,
@@ -137,7 +192,7 @@ pub enum GameState {
     },
 }
 
-pub struct Game{
+pub struct Game {
     pub tile_pool: Vec<Letter>,
     rng: SmallRng,
     board: Board,
@@ -148,15 +203,17 @@ pub struct Game{
     state: GameState,
 }
 
-
 impl Game {
-    pub fn new(seed: u64, dictionary_text: &str, player_names: Vec<String>, ai_difficulties: Vec<Difficulty>) -> Self {
-        let mut rng = SmallRng::seed_from_u64(seed);
+    pub fn new_specific(
+        mut rng: SmallRng,
+        dictionary: DictionaryImpl,
+        player_names: Vec<String>,
+        ai_difficulties: Vec<Difficulty>,
+    ) -> Self {
         let mut letters = standard_tile_pool(Some(&mut rng));
 
-        let dictionary = DictionaryImpl::create_from_str(dictionary_text);
-
-        let mut player_states: Vec<PlayerState> = player_names.iter()
+        let mut player_states: Vec<PlayerState> = player_names
+            .iter()
             .map(|name| {
                 let mut tray = Tray::new(TRAY_LENGTH);
                 tray.fill(&mut letters);
@@ -174,7 +231,7 @@ impl Game {
             let mut tray = Tray::new(TRAY_LENGTH);
             tray.fill(&mut letters);
             let ai_player_name = if ai_length > 1 {
-                format!("AI {}", i+1)
+                format!("AI {}", i + 1)
             } else {
                 "AI".to_string()
             };
@@ -204,15 +261,27 @@ impl Game {
         }
     }
 
+    pub fn new(
+        seed: u64,
+        dictionary_text: &str,
+        player_names: Vec<String>,
+        ai_difficulties: Vec<Difficulty>,
+    ) -> Self {
+        let rng = SmallRng::seed_from_u64(seed);
+        let dictionary = DictionaryImpl::create_from_str(dictionary_text);
 
+        Self::new_specific(rng, dictionary, player_names, ai_difficulties)
+    }
 
-    pub fn get_board(&self) -> &Board {&self.board}
+    pub fn get_board(&self) -> &Board {
+        &self.board
+    }
 
     pub fn set_board(&mut self, new_board: Board) {
         self.board = new_board;
     }
 
-    fn fill_trays(&mut self){
+    fn fill_trays(&mut self) {
         for state in self.player_states.0.iter_mut() {
             let tray = &mut state.tray;
             tray.fill(&mut self.tile_pool);
@@ -223,14 +292,18 @@ impl Game {
         &self.dictionary
     }
 
-    fn verify_game_in_progress(&self) -> Result<(), String> {
+    fn verify_game_in_progress(&self) -> Result<(), Error> {
         if !matches!(self.state, GameState::InProgress) {
-            return Err("Moves cannot be made after a game has finished".to_string());
+            return Err(Error::GameFinished);
         }
         Ok(())
     }
 
-    pub fn receive_play(&mut self, tray_tile_locations: Vec<Option<PlayedTile>>, commit_move: bool) -> Result<(TurnAction, GameState), String> {
+    pub fn receive_play(
+        &mut self,
+        tray_tile_locations: Vec<Option<PlayedTile>>,
+        commit_move: bool,
+    ) -> Result<(TurnAction, GameState), Error> {
         self.verify_game_in_progress()?;
 
         let player = self.current_player_name();
@@ -238,7 +311,8 @@ impl Game {
         let mut board_instance = self.get_board().clone();
         let mut tray = self.player_states.get_tray(&player).unwrap().clone();
 
-        let played_letters: Vec<(Letter, Coordinates)> = PlayedTile::convert_tray(&tray_tile_locations, &tray);
+        let played_letters: Vec<(Letter, Coordinates)> =
+            PlayedTile::convert_tray(&tray_tile_locations, &tray);
         for (i, played_tile) in tray_tile_locations.iter().enumerate() {
             if played_tile.is_some() {
                 *tray.letters.get_mut(i).unwrap() = None;
@@ -247,17 +321,14 @@ impl Game {
 
         board_instance.receive_play(played_letters)?;
 
-
         let x = board_instance.calculate_scores(self.get_dictionary())?;
         let total_score = x.1;
 
-        let words: Vec<WordResult> = x.0.iter()
-            .map(|(word, score)| {
-                WordResult {
+        let words: Vec<WordResult> =
+            x.0.iter()
+                .map(|(word, score)| WordResult {
                     word: word.to_string(),
-                    score: *score
-                }
-
+                    score: *score,
                 })
                 .collect();
 
@@ -276,28 +347,42 @@ impl Game {
                 // game is over
                 self.end_game(Some(player));
             }
-
         }
 
-        Ok((TurnAction::PlayTiles {
+        let locations = tray_tile_locations
+            .iter()
+            .filter_map(|x| x.as_ref())
+            .map(|x| x.index)
+            .collect::<Vec<usize>>();
+
+        Ok((
+            TurnAction::PlayTiles {
                 result: ScoreResult {
                     words,
                     total: total_score,
                 },
-        }, self.state.clone()))
+                locations,
+            },
+            self.get_state(),
+        ))
     }
 
-    pub fn exchange_tiles(&mut self, tray_tile_locations: Vec<bool>) -> Result<(Tray, TurnAction, GameState), String> {
+    pub fn exchange_tiles(
+        &mut self,
+        tray_tile_locations: Vec<bool>,
+    ) -> Result<(Tray, TurnAction, GameState), Error> {
         self.verify_game_in_progress()?;
 
         let player = self.current_player_name();
         let tray = match self.player_states.get_tray_mut(&player) {
-            None => {return Err(format!("Player {} not found", player))}
-            Some(x) => {x}
+            None => return Err(Error::InvalidPlayer(player)),
+            Some(x) => x,
         };
 
         if tray.letters.len() != tray_tile_locations.len() {
-            return Err("Incoming tray and existing tray have different lengths".to_string());
+            return Err(Error::Other(
+                "Incoming tray and existing tray have different lengths".to_string(),
+            ));
         }
 
         let tile_pool = &mut self.tile_pool;
@@ -321,31 +406,33 @@ impl Game {
 
         let state = self.increment_turn(false);
 
-        Ok((tray, TurnAction::ExchangeTiles { tiles_exchanged }, state.clone()))
-
+        Ok((
+            tray,
+            TurnAction::ExchangeTiles { tiles_exchanged },
+            state.clone(),
+        ))
     }
 
-    pub fn add_word(&mut self, word: String) {
+    pub fn add_word(&mut self, word: &str) {
         let word = word.to_uppercase();
 
         self.dictionary.insert(word, -1.0);
     }
 
-    pub fn pass(&mut self) -> Result<GameState, String> {
+    pub fn pass(&mut self) -> Result<GameState, Error> {
         self.verify_game_in_progress()?;
         Ok(self.increment_turn(false).clone())
     }
 
-    fn increment_turn(&mut self, played: bool) -> &GameState{
+    fn increment_turn(&mut self, played: bool) -> &GameState {
         self.turn_order += 1;
         if !played {
             self.turns_not_played += 1;
 
             // check if game has ended due to passing
-            if self.turns_not_played >= 2*self.player_states.0.len() {
+            if self.turns_not_played >= 2 * self.player_states.0.len() {
                 self.end_game(None);
             }
-
         } else {
             self.turns_not_played = 0;
         }
@@ -354,7 +441,6 @@ impl Game {
     }
 
     fn end_game(&mut self, finisher: Option<String>) {
-
         let mut finished_letters_map = HashMap::new();
         let mut points_forfeit = 0;
 
@@ -376,25 +462,30 @@ impl Game {
         }
 
         if let Some(finisher) = &finisher {
-            let mut state = self.player_states.get_player_state_mut(finisher).unwrap();
+            let state = self.player_states.get_player_state_mut(finisher).unwrap();
             state.score += points_forfeit;
         }
 
         self.state = GameState::Ended {
             finisher,
-            remaining_tiles: finished_letters_map
+            remaining_tiles: finished_letters_map,
         };
     }
 
     pub fn current_player_name(&self) -> String {
-        self.player_states.get_player_name_by_turn_id(self.turn_order).to_string()
+        self.player_states
+            .get_player_name_by_turn_id(self.turn_order)
+            .to_string()
     }
 
-    pub fn advance_turn(&mut self) -> Result<(TurnAdvanceResult, GameState), String> {
+    pub fn advance_turn(&mut self) -> Result<(TurnAdvanceResult, GameState), Error> {
         let current_player = self.current_player_name();
-        let state = self.player_states.get_player_state_mut(&current_player).ok_or("There should be a player available")?;
+        let state = self
+            .player_states
+            .get_player_state_mut(&current_player)
+            .ok_or(Error::InvalidPlayer(current_player.clone()))?;
 
-        if let Player::AI {object, .. } = &mut state.player {
+        if let Player::AI { object, .. } = &mut state.player {
             let tray = &mut state.tray;
 
             let best_move = object.find_best_move(tray, &self.board, &mut self.rng);
@@ -407,105 +498,123 @@ impl Game {
                         match tile_spot {
                             None => {
                                 to_exchange.push(false);
-                            },
+                            }
                             Some(_) => {
                                 to_exchange.push(true);
                             }
                         }
                     }
 
-                    if self.tile_pool.is_empty(){
+                    if self.tile_pool.is_empty() {
                         let game_state = self.increment_turn(false);
-                        Ok((TurnAdvanceResult::AIMove {
+                        Ok((
+                            TurnAdvanceResult::AIMove {
                                 name: current_player,
                                 action: TurnAction::Pass,
-                        }, game_state.clone()))
+                            },
+                            game_state.clone(),
+                        ))
                     } else {
                         let (_, action, game_state) = self.exchange_tiles(to_exchange)?;
-                        Ok((TurnAdvanceResult::AIMove {
+                        Ok((
+                            TurnAdvanceResult::AIMove {
                                 name: current_player,
                                 action,
-                        }, game_state))
+                            },
+                            game_state,
+                        ))
                     }
-
-
                 }
                 Some(best_move) => {
                     let play = best_move.convert_to_play(tray);
                     let (action, game_state) = self.receive_play(play, true)?;
-                    Ok((TurnAdvanceResult::AIMove {
+                    Ok((
+                        TurnAdvanceResult::AIMove {
                             name: current_player,
                             action,
-                    }, game_state))
+                        },
+                        game_state,
+                    ))
                 }
             }
         } else {
-            Ok((TurnAdvanceResult::HumanInputRequired{name: self.current_player_name()}, self.state.clone()))
+            Ok((
+                TurnAdvanceResult::HumanInputRequired {
+                    name: self.current_player_name(),
+                },
+                self.get_state(),
+            ))
         }
-
-
     }
 
     pub fn get_remaining_tiles(&self) -> usize {
         self.tile_pool.len()
     }
 
-    pub fn get_player_tile_count(&self, player: &str) -> Result<usize, String> {
-        let tray = match self.player_states.get_tray(&player) {
-            None => {return Err(format!("Player {} not found", player))}
-            Some(x) => {x}
-        };
-
-        Ok(
-            tray.count()
-        )
+    pub fn get_number_turns(&self) -> usize {
+        self.turn_order
     }
 
+    pub fn get_player_tile_count(&self, player: &str) -> Result<usize, String> {
+        let tray = match self.player_states.get_tray(&player) {
+            None => return Err(format!("Player {} not found", player)),
+            Some(x) => x,
+        };
 
+        Ok(tray.count())
+    }
 
+    pub fn get_state(&self) -> GameState {
+        self.state.clone()
+    }
 }
 
-#[derive(Serialize, Deserialize, Tsify, Debug)]
-#[tsify(from_wasm_abi)]
+#[derive(Serialize, Deserialize, Debug, Clone)]
 #[serde(tag = "type")]
 pub enum TurnAction {
     Pass,
-    ExchangeTiles{
-        tiles_exchanged: usize
+    ExchangeTiles {
+        tiles_exchanged: usize,
     },
-    PlayTiles{
-        result: ScoreResult
+    PlayTiles {
+        result: ScoreResult,
+        locations: Vec<usize>,
+    },
+    AddToDictionary {
+        word: String,
     },
 }
 
-#[derive(Serialize, Deserialize, Tsify, Debug)]
-#[tsify(from_wasm_abi)]
+#[derive(Serialize, Deserialize, Debug)]
 #[serde(tag = "type")]
 pub enum TurnAdvanceResult {
-    HumanInputRequired{
-        name: String
-    },
-    AIMove{
-        name: String,
-        action: TurnAction,
-    }
+    HumanInputRequired { name: String },
+    AIMove { name: String, action: TurnAction },
 }
 
 #[cfg(test)]
 mod tests {
 
-    use std::fs;
     use crate::game::Game;
     use crate::player_interaction::ai::Difficulty;
+    use std::fs;
 
     #[test]
     fn test_game() {
         let seed = 124;
 
-        let dictionary_path = "resources/dictionary.csv";
+        let dictionary_path = "../resources/dictionary.csv";
         let dictionary_string = fs::read_to_string(dictionary_path).unwrap();
 
-        let mut game = Game::new(seed, &dictionary_string, vec!["Player".to_string()], vec![Difficulty{proportion: 0.5, randomness: 0.0}]);
+        let mut game = Game::new(
+            seed,
+            &dictionary_string,
+            vec!["Player".to_string()],
+            vec![Difficulty {
+                proportion: 0.5,
+                randomness: 0.0,
+            }],
+        );
 
         let current_player = game.current_player_name();
         println!("Current player is {current_player}");
@@ -522,7 +631,5 @@ mod tests {
 
         assert_eq!(game.current_player_name(), "Player");
         assert_eq!(0, game.turns_not_played);
-
     }
-
 }

wordgrid/src/lib.rs

@@ -0,0 +1,6 @@
+pub mod api;
+pub mod board;
+pub mod constants;
+pub mod dictionary;
+pub mod game;
+pub mod player_interaction;

wordgrid/src/player_interaction.rs

@@ -1,14 +1,11 @@
-use serde::{Deserialize, Serialize};
-use tsify::Tsify;
 use crate::board::Letter;
-
+use serde::{Deserialize, Serialize};
 
 pub mod ai;
 
-#[derive(Debug, Serialize, Deserialize, Tsify, Clone)]
-#[tsify(from_wasm_abi)]
+#[derive(Debug, Serialize, Deserialize, Clone)]
 pub struct Tray {
-    pub letters: Vec<Option<Letter>>
+    pub letters: Vec<Option<Letter>>,
 }
 
 impl Tray {
@@ -17,9 +14,7 @@ impl Tray {
         for _ in 0..tray_length {
             letters.push(None);
         }
-        Tray {
-            letters
-        }
+        Tray { letters }
     }
 
     pub fn fill(&mut self, standard_tile_pool: &mut Vec<Letter>) {
@@ -37,25 +32,20 @@ impl Tray {
     }
 
     pub fn count(&self) -> usize {
-        self.letters.iter()
-            .filter(|l| l.is_some())
-            .count()
+        self.letters.iter().filter(|l| l.is_some()).count()
     }
-
-
 }
 
 #[cfg(test)]
 mod tests {
     use super::*;
 
-
     #[test]
     fn test_tray() {
         let mut letters = vec![
             Letter::new(Some('E'), 3),
             Letter::new(Some('O'), 2),
-            Letter::new(Some('J'), 1)
+            Letter::new(Some('J'), 1),
         ];
 
         let mut tray = Tray::new(5);
@@ -89,8 +79,5 @@ mod tests {
         assert_eq!(tray.letters.get(2).unwrap().unwrap().text, 'E');
         assert!(tray.letters.get(3).unwrap().is_none());
         assert!(tray.letters.get(4).unwrap().is_none());
-
-
     }
-
 }

wordgrid/src/player_interaction/ai.rs

@@ -1,14 +1,16 @@
-use std::collections::{HashMap, HashSet};
-use rand::Rng;
-use serde::{Deserialize, Serialize};
-use tsify::Tsify;
 use crate::board::{Board, CellType, Coordinates, Direction, Letter};
 use crate::constants::GRID_LENGTH;
 use crate::dictionary::DictionaryImpl;
 use crate::game::PlayedTile;
 use crate::player_interaction::Tray;
+use rand::Rng;
+use serde::{Deserialize, Serialize};
+use std::collections::{HashMap, HashSet};
 
-const ALPHABET: [char; 26] = ['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'];
+const ALPHABET: [char; 26] = [
+    'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S',
+    'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
+];
 
 struct CoordinateLineMapper {
     direction: Direction,
@@ -18,18 +20,13 @@ struct CoordinateLineMapper {
 impl CoordinateLineMapper {
     fn line_to_coord(&self, variable: u8) -> Coordinates {
         match self.direction {
-            Direction::Row => {
-                Coordinates(variable, self.fixed)
-            }
-            Direction::Column => {
-                Coordinates(self.fixed, variable)
-            }
+            Direction::Row => Coordinates(variable, self.fixed),
+            Direction::Column => Coordinates(self.fixed, variable),
         }
     }
 }
 
-#[derive(Copy, Clone, Serialize, Deserialize, Tsify)]
-#[tsify(from_wasm_abi)]
+#[derive(Copy, Clone, Serialize, Deserialize, Debug)]
 pub struct Difficulty {
     pub proportion: f64,
     pub randomness: f64,
@@ -48,7 +45,6 @@ pub struct AI {
 type MoveMap = HashMap<char, u32>;
 type CrossTiles = Vec<Option<MoveMap>>;
 
-
 #[derive(Debug, Eq, PartialEq, Hash)]
 pub struct CompleteMove {
     moves: Vec<MoveComponent>,
@@ -56,10 +52,11 @@ pub struct CompleteMove {
 }
 
 impl CompleteMove {
-
     pub fn convert_to_play(&self, tray: &Tray) -> Vec<Option<PlayedTile>> {
         let mut played_tiles = Vec::with_capacity(tray.letters.len());
-        let mut moves = self.moves.iter()
+        let mut moves = self
+            .moves
+            .iter()
             .map(|m| Some(m.clone()))
             .collect::<Vec<Option<MoveComponent>>>();
 
@@ -88,7 +85,7 @@ impl CompleteMove {
                                     found_match = true;
                                     break;
                                 }
-                            },
+                            }
                             None => {}
                         }
                     }
@@ -127,29 +124,28 @@ struct MoveComponent {
 }
 
 impl AI {
-
-    pub fn new(difficulty: Difficulty, dictionary: &DictionaryImpl) -> Self{
+    pub fn new(difficulty: Difficulty, dictionary: &DictionaryImpl) -> Self {
         let mut ai_dictionary = HashSet::new();
         let mut substrings = HashSet::new();
 
         for (word, score) in dictionary.iter() {
-            if *score >= difficulty.proportion { // TODO - may need to reverse
+            if *score >= difficulty.proportion {
+                // TODO - may need to reverse
 
                 ai_dictionary.insert(word.clone());
                 substrings.insert(word.clone());
 
                 for i in 0..word.len() {
-                    for j in i+1..word.len() {
+                    for j in i + 1..word.len() {
                         substrings.insert(word[i..j].to_string());
                     }
                 }
-
-
             }
         }
 
         let board_view = Board::new();
-        let mut column_cross_tiles = CrossTiles::with_capacity((GRID_LENGTH * GRID_LENGTH) as usize);
+        let mut column_cross_tiles =
+            CrossTiles::with_capacity((GRID_LENGTH * GRID_LENGTH) as usize);
         let mut row_cross_tiles = CrossTiles::with_capacity((GRID_LENGTH * GRID_LENGTH) as usize);
 
         board_view.cells.iter().for_each(|_| {
@@ -168,15 +164,20 @@ impl AI {
         }
     }
 
-    pub fn find_best_move<R: Rng>(&mut self, tray: &Tray, grid: &Board, rng: &mut R) -> Option<CompleteMove>{
+    pub fn find_best_move<R: Rng>(
+        &mut self,
+        tray: &Tray,
+        grid: &Board,
+        rng: &mut R,
+    ) -> Option<CompleteMove> {
         let move_set = self.find_all_moves(tray, grid);
 
         let mut best_move: Option<(CompleteMove, f64)> = None;
 
         for possible_move in move_set {
-            let move_score =
-            if self.difficulty.randomness > 0.0 {
-                (1.0 - self.difficulty.randomness) * (possible_move.score as f64) + self.difficulty.randomness * rng.gen_range(0.0..1.0)
+            let move_score = if self.difficulty.randomness > 0.0 {
+                (1.0 - self.difficulty.randomness) * (possible_move.score as f64)
+                    + self.difficulty.randomness * rng.gen_range(0.0..1.0)
             } else {
                 possible_move.score as f64
             };
@@ -194,10 +195,9 @@ impl AI {
         }
 
         return match best_move {
-            None => {None}
-            Some((best_move, _)) => {Some(best_move)}
+            None => None,
+            Some((best_move, _)) => Some(best_move),
         };
-
     }
 
     fn find_all_moves(&mut self, tray: &Tray, grid: &Board) -> HashSet<CompleteMove> {
@@ -215,15 +215,17 @@ impl AI {
         &self,
         tray: &Tray,
         direction: Direction,
-        all_moves: &mut HashSet<CompleteMove>) {
-
+        all_moves: &mut HashSet<CompleteMove>,
+    ) {
         // If you're building a word in one direction, you need to form valid words in the cross-direction
         let cross_tiles = match direction {
-            Direction::Column => {&self.row_cross_tiles}
-            Direction::Row => {&self.column_cross_tiles}
+            Direction::Column => &self.row_cross_tiles,
+            Direction::Row => &self.column_cross_tiles,
         };
 
-        let tray_letters = tray.letters.iter()
+        let tray_letters = tray
+            .letters
+            .iter()
             .filter(|letter| letter.is_some())
             .map(|letter| letter.unwrap())
             .collect::<Vec<Letter>>();
@@ -234,7 +236,7 @@ impl AI {
 
             let coord_mapper = CoordinateLineMapper {
                 direction,
-                fixed: k
+                fixed: k,
             };
 
             for p in 0..GRID_LENGTH {
@@ -246,13 +248,12 @@ impl AI {
             for l in 0..GRID_LENGTH {
                 let coords = coord_mapper.line_to_coord(l);
 
-                let is_anchored = check_if_anchored(&self.board_view, coords, Direction::Row) ||
-                    check_if_anchored(&self.board_view, coords, Direction::Column);
+                let is_anchored = check_if_anchored(&self.board_view, coords, Direction::Row)
+                    || check_if_anchored(&self.board_view, coords, Direction::Column);
 
-                if is_anchored &&
-                    line_letters.get(l as usize).unwrap().is_none() // it's duplicate work to check here when we'll already check at either free side
+                if is_anchored && line_letters.get(l as usize).unwrap().is_none()
+                // it's duplicate work to check here when we'll already check at either free side
                 {
-
                     self.evaluate_spot_heading_left(
                         &line_letters,
                         &line_cross_letters,
@@ -262,17 +263,11 @@ impl AI {
                         &Vec::new(),
                         1,
                         &MoveScoring::new(),
-
-                        all_moves
-
+                        all_moves,
                     );
-
-                }
-
-
                 }
             }
-
+        }
     }
 
     fn evaluate_spot_heading_left(
@@ -287,10 +282,8 @@ impl AI {
         min_length: usize,
         current_points: &MoveScoring,
 
-        all_moves: &mut HashSet<CompleteMove>
-
+        all_moves: &mut HashSet<CompleteMove>,
     ) {
-
         if line_index < 0 || line_index >= GRID_LENGTH as i8 {
             return;
         }
@@ -300,10 +293,13 @@ impl AI {
             Some(_) => {
                 // there's a letter here; need to take a step left if we can
 
-                if !(line_index >= 1 &&
-                    line_letters.get((line_index-1) as usize).unwrap().is_some() &&
-                    min_length == 1
-                ) {
+                if !(line_index >= 1
+                    && line_letters
+                        .get((line_index - 1) as usize)
+                        .unwrap()
+                        .is_some()
+                    && min_length == 1)
+                {
                     // if-statement is basically saying that if we're at the start of the process (min_length==1) and there's a word still to our left,
                     // just stop. Other versions of the for-loops that call this function will have picked up that case.
                     self.evaluate_spot_heading_left(
@@ -315,9 +311,8 @@ impl AI {
                         current_play,
                         min_length,
                         current_points,
-                        all_moves
+                        all_moves,
                     );
-
                 }
             }
             None => {
@@ -331,10 +326,9 @@ impl AI {
                         min_length,
                         current_points,
                         coord_mapper,
-
                         &available_letters,
                         letter.clone(),
-                        all_moves
+                        all_moves,
                     );
                 }
 
@@ -348,12 +342,10 @@ impl AI {
                     current_play,
                     min_length + 1,
                     current_points,
-                    all_moves
+                    all_moves,
                 );
             }
         }
-
-
     }
 
     fn evaluate_letter_at_spot(
@@ -366,13 +358,10 @@ impl AI {
         current_points: &MoveScoring,
         coord_mapper: &CoordinateLineMapper,
 
-
         available_letters: &Vec<Letter>,
         letter: Letter,
-        all_moves: &mut HashSet<CompleteMove>
-
+        all_moves: &mut HashSet<CompleteMove>,
     ) {
-
         if letter.is_blank {
             // need to loop through alphabet
             for alpha in ALPHABET {
@@ -389,8 +378,7 @@ impl AI {
                     coord_mapper,
                     available_letters,
                     letter,
-                    all_moves
-
+                    all_moves,
                 );
             }
         } else {
@@ -404,10 +392,9 @@ impl AI {
                 coord_mapper,
                 available_letters,
                 letter.clone(),
-                all_moves
+                all_moves,
             );
         }
-
     }
 
     fn evaluate_non_blank_letter_at_spot(
@@ -419,15 +406,12 @@ impl AI {
         min_length: usize,
         current_points: &MoveScoring,
 
-
         coord_mapper: &CoordinateLineMapper,
         available_letters: &Vec<Letter>,
         letter: Letter,
 
         all_moves: &mut HashSet<CompleteMove>,
-
     ) {
-
         // let's now assign the letter to this spot
         let mut line_letters = line_letters.clone();
         *line_letters.get_mut(line_index as usize).unwrap() = Some(letter);
@@ -458,7 +442,11 @@ impl AI {
 
         // making copy
         let mut current_points = current_points.clone();
-        let cell_type = self.board_view.get_cell(coord_mapper.line_to_coord(line_index as u8)).unwrap().cell_type;
+        let cell_type = self
+            .board_view
+            .get_cell(coord_mapper.line_to_coord(line_index as u8))
+            .unwrap()
+            .cell_type;
 
         // first we score cross letters
         if let Some(map) = cross_letters {
@@ -508,7 +496,8 @@ impl AI {
                 current_points.main_scoring += letter.points * 2;
             }
             CellType::TripleLetter => {
-                current_points.main_scoring += letter.points * 3;}
+                current_points.main_scoring += letter.points * 3;
+            }
         };
 
         // finally, while we know that we're in a valid substring we should check if this is a valid word or not
@@ -516,7 +505,8 @@ impl AI {
         if word.len() >= min_length && self.dictionary.contains(&word) {
             let new_move = CompleteMove {
                 moves: current_play.clone(),
-                score: current_points.cross_scoring + current_points.main_scoring*current_points.multiplier,
+                score: current_points.cross_scoring
+                    + current_points.main_scoring * current_points.multiplier,
             };
             all_moves.insert(new_move);
         }
@@ -525,8 +515,7 @@ impl AI {
         let mut new_available_letters = Vec::with_capacity(available_letters.len() - 1);
         let mut skipped_one = false;
 
-        available_letters.iter()
-            .for_each(|in_tray| {
+        available_letters.iter().for_each(|in_tray| {
             if skipped_one || !in_tray.partial_match(&letter) {
                 new_available_letters.push(*in_tray);
             } else {
@@ -539,15 +528,13 @@ impl AI {
         self.evaluate_spot_heading_right(
             &line_letters,
             line_cross_letters,
-            line_index+1,
+            line_index + 1,
             current_play,
             min_length,
             &current_points,
-
             coord_mapper,
             &new_available_letters,
-
-            all_moves
+            all_moves,
         );
     }
 
@@ -560,13 +547,11 @@ impl AI {
         min_length: usize,
         current_points: &MoveScoring,
 
-
         coord_mapper: &CoordinateLineMapper,
         available_letters: &Vec<Letter>,
 
         all_moves: &mut HashSet<CompleteMove>,
     ) {
-
         // out-of-bounds check
         if line_index < 0 || line_index >= GRID_LENGTH as i8 {
             return;
@@ -586,7 +571,7 @@ impl AI {
                     &current_points,
                     coord_mapper,
                     available_letters,
-                    all_moves
+                    all_moves,
                 );
             }
             None => {
@@ -601,10 +586,8 @@ impl AI {
                         current_points,
                         coord_mapper,
                         available_letters,
-
                         letter.clone(),
-                        all_moves
-
+                        all_moves,
                     )
                 }
             }
@@ -625,16 +608,20 @@ impl AI {
         }
 
         let mut check_for_valid_moves = |coords: Coordinates| {
-
             let cell = new.get_cell(coords).unwrap();
             if cell.value.is_none() {
                 let valid_row_moves = self.get_letters_that_make_words(new, Direction::Row, coords);
-                let valid_column_moves = self.get_letters_that_make_words(new, Direction::Column, coords);
+                let valid_column_moves =
+                    self.get_letters_that_make_words(new, Direction::Column, coords);
 
-                let existing_row_moves = self.row_cross_tiles.get_mut(coords.map_to_index()).unwrap();
+                let existing_row_moves =
+                    self.row_cross_tiles.get_mut(coords.map_to_index()).unwrap();
                 *existing_row_moves = valid_row_moves;
 
-                let existing_column_moves = self.column_cross_tiles.get_mut(coords.map_to_index()).unwrap();
+                let existing_column_moves = self
+                    .column_cross_tiles
+                    .get_mut(coords.map_to_index())
+                    .unwrap();
                 *existing_column_moves = valid_column_moves;
             }
         };
@@ -652,10 +639,14 @@ impl AI {
                 check_for_valid_moves(coords);
             }
         });
-
     }
 
-    fn get_letters_that_make_words(&self, new: &Board, direction: Direction, coords: Coordinates) -> Option<MoveMap> {
+    fn get_letters_that_make_words(
+        &self,
+        new: &Board,
+        direction: Direction,
+        coords: Coordinates,
+    ) -> Option<MoveMap> {
         let is_anchored = check_if_anchored(new, coords, direction);
         if !is_anchored {
             return None;
@@ -687,11 +678,9 @@ impl AI {
 
         Some(new_map)
     }
-
 }
 
-fn check_if_anchored(grid: &Board, coords: Coordinates, direction: Direction) -> bool{
-
+fn check_if_anchored(grid: &Board, coords: Coordinates, direction: Direction) -> bool {
     // Middle tile is always considered anchored
     if coords.0 == GRID_LENGTH / 2 && coords.1 == GRID_LENGTH / 2 {
         return true;
@@ -699,7 +688,7 @@ fn check_if_anchored(grid: &Board, coords: Coordinates, direction: Direction) ->
 
     let has_letter = |alt_coord: Option<Coordinates>| -> bool {
         match alt_coord {
-            None => {false}
+            None => false,
             Some(alt_coord) => {
                 let cell = grid.get_cell(alt_coord).unwrap();
                 cell.value.is_some()
@@ -719,7 +708,11 @@ fn find_word_on_line(line_letters: &Vec<Option<Letter>>, line_index: i8) -> Stri
         if start_word < 1 {
             break;
         }
-        if line_letters.get((start_word - 1) as usize).unwrap().is_none() {
+        if line_letters
+            .get((start_word - 1) as usize)
+            .unwrap()
+            .is_none()
+        {
             break;
         }
         start_word -= 1;
@@ -738,7 +731,8 @@ fn find_word_on_line(line_letters: &Vec<Option<Letter>>, line_index: i8) -> Stri
 
     let mut str = String::new();
     line_letters[(start_word as usize)..((end_word + 1) as usize)]
-        .iter().for_each(|letter| {
+        .iter()
+        .for_each(|letter| {
             str.push(letter.unwrap().text);
         });
 
@@ -747,10 +741,10 @@ fn find_word_on_line(line_letters: &Vec<Option<Letter>>, line_index: i8) -> Stri
 
 #[cfg(test)]
 mod tests {
+    use super::*;
+    use crate::dictionary::Dictionary;
     use rand::rngs::SmallRng;
     use rand::SeedableRng;
-    use crate::dictionary::Dictionary;
-    use super::*;
 
     fn set_cell(board: &mut Board, x: u8, y: u8, letter: char, points: u32) {
         let cell = board.get_cell_mut(Coordinates(x, y)).unwrap();
@@ -793,31 +787,31 @@ mod tests {
         dictionary.insert("APPLE".to_string(), 0.9);
 
         let mut tray = Tray::new(7);
-        tray.letters[0] = Some(Letter{
+        tray.letters[0] = Some(Letter {
             text: 'A',
             points: 5,
             ephemeral: false,
             is_blank: false,
         });
-        tray.letters[1] = Some(Letter{
+        tray.letters[1] = Some(Letter {
             text: 'P',
             points: 4,
             ephemeral: false,
             is_blank: false,
         });
-        tray.letters[2] = Some(Letter{
+        tray.letters[2] = Some(Letter {
             text: 'P',
             points: 4,
             ephemeral: false,
             is_blank: false,
         });
-        tray.letters[3] = Some(Letter{
+        tray.letters[3] = Some(Letter {
             text: 'L',
             points: 3,
             ephemeral: false,
             is_blank: false,
         });
-        tray.letters[4] = Some(Letter{
+        tray.letters[4] = Some(Letter {
             text: 'E',
             points: 4,
             ephemeral: false,
@@ -832,14 +826,12 @@ mod tests {
 
         assert_eq!(moves.len(), 10);
 
-        tray.letters[4] = Some(
-            Letter {
+        tray.letters[4] = Some(Letter {
             text: ' ',
             points: 0,
             ephemeral: false,
             is_blank: true,
-            }
-        );
+        });
 
         let moves = ai.find_all_moves(&tray, &board);
 
@@ -857,8 +849,6 @@ mod tests {
         set_cell(&mut board, 7, 9, 'A', 1);
         set_cell(&mut board, 7, 10, 'T', 1);
 
-
-
         let difficulty = Difficulty {
             proportion: 0.0, // restrict yourself to words with this proportion OR HIGHER
             randomness: 0.0,
@@ -869,25 +859,25 @@ mod tests {
         dictionary.insert("SLAM".to_string(), 0.9);
 
         let mut tray = Tray::new(7);
-        tray.letters[0] = Some(Letter{
+        tray.letters[0] = Some(Letter {
             text: 'S',
             points: 1,
             ephemeral: false,
             is_blank: false,
         });
-        tray.letters[1] = Some(Letter{
+        tray.letters[1] = Some(Letter {
             text: 'L',
             points: 1,
             ephemeral: false,
             is_blank: false,
         });
-        tray.letters[6] = Some(Letter{
+        tray.letters[6] = Some(Letter {
             text: 'A',
             points: 1,
             ephemeral: false,
             is_blank: false,
         });
-        tray.letters[3] = Some(Letter{
+        tray.letters[3] = Some(Letter {
             text: 'M',
             points: 3,
             ephemeral: false,
@@ -898,7 +888,10 @@ mod tests {
 
         ai.update_state(&board);
 
-        let end_of_boat = ai.column_cross_tiles.get(Coordinates(7, 11).map_to_index()).unwrap();
+        let end_of_boat = ai
+            .column_cross_tiles
+            .get(Coordinates(7, 11).map_to_index())
+            .unwrap();
         assert!(end_of_boat.is_some());
         assert_eq!(end_of_boat.as_ref().unwrap().len(), 1);
 
@@ -906,7 +899,6 @@ mod tests {
 
         println!("Moves are {:?}", moves);
 
-
         // 3 possible moves -
         //      1. put 'S' at the end of 'BOAT' and form words 'SLAM' and 'BOATS'
         //      2. Put 'S' at end of 'BOAT'
@@ -920,7 +912,6 @@ mod tests {
 
         let play = best_move.convert_to_play(&tray);
         println!("Play is {:?}", play);
-
     }
 
     #[test]
@@ -943,25 +934,30 @@ mod tests {
         let above_cell_coords = Coordinates(7, 6);
         let left_cell_cords = Coordinates(6, 7);
 
-        let row_cross_tiles = ai.row_cross_tiles.get(left_cell_cords.map_to_index()).unwrap();
-        let column_cross_tiles = ai.column_cross_tiles.get(above_cell_coords.map_to_index()).unwrap();
+        let row_cross_tiles = ai
+            .row_cross_tiles
+            .get(left_cell_cords.map_to_index())
+            .unwrap();
+        let column_cross_tiles = ai
+            .column_cross_tiles
+            .get(above_cell_coords.map_to_index())
+            .unwrap();
 
         assert_eq!(row_cross_tiles.as_ref().unwrap().len(), 1);
         assert_eq!(column_cross_tiles.as_ref().unwrap().len(), 1);
 
         let far_off_tiles = ai.row_cross_tiles.get(0).unwrap();
         assert!(far_off_tiles.is_none());
-
     }
 
     #[test]
     fn test_valid_moves() {
         let mut board = Board::new();
 
-        set_cell(&mut board, 7-3, 7+3, 'Z', 1);
-        set_cell(&mut board, 6-3, 8+3, 'A', 1);
-        set_cell(&mut board, 7-3, 8+3, 'A', 1);
-        set_cell(&mut board, 7-3, 9+3, 'Z', 1);
+        set_cell(&mut board, 7 - 3, 7 + 3, 'Z', 1);
+        set_cell(&mut board, 6 - 3, 8 + 3, 'A', 1);
+        set_cell(&mut board, 7 - 3, 8 + 3, 'A', 1);
+        set_cell(&mut board, 7 - 3, 9 + 3, 'Z', 1);
 
         let difficulty = Difficulty {
             proportion: 0.0, // restrict yourself to words with this proportion OR HIGHER
@@ -972,7 +968,7 @@ mod tests {
         dictionary.insert("AA".to_string(), 0.5);
 
         let mut tray = Tray::new(7);
-        tray.letters[0] = Some(Letter{
+        tray.letters[0] = Some(Letter {
             text: 'A',
             points: 1,
             ephemeral: false,
@@ -992,50 +988,52 @@ mod tests {
     fn test_starting_move() {
         let mut board = Board::new();
 
-        let difficulty = Difficulty{proportion: 0.1, randomness: 0.0};
+        let difficulty = Difficulty {
+            proportion: 0.1,
+            randomness: 0.0,
+        };
 
         let mut dictionary = DictionaryImpl::new();
         dictionary.insert("TWEETED".to_string(), 0.2);
 
-
         let mut tray = Tray::new(7);
-        tray.letters[0] = Some(Letter{
+        tray.letters[0] = Some(Letter {
             text: 'I',
             points: 1,
             ephemeral: false,
             is_blank: false,
         });
-        tray.letters[1] = Some(Letter{
+        tray.letters[1] = Some(Letter {
             text: 'R',
             points: 1,
             ephemeral: false,
             is_blank: false,
         });
-        tray.letters[2] = Some(Letter{
+        tray.letters[2] = Some(Letter {
             text: 'W',
             points: 1,
             ephemeral: false,
             is_blank: false,
         });
-        tray.letters[3] = Some(Letter{
+        tray.letters[3] = Some(Letter {
             text: 'I',
             points: 1,
             ephemeral: false,
             is_blank: false,
         });
-        tray.letters[4] = Some(Letter{
+        tray.letters[4] = Some(Letter {
             text: 'T',
             points: 1,
             ephemeral: false,
             is_blank: false,
         });
-        tray.letters[5] = Some(Letter{
+        tray.letters[5] = Some(Letter {
             text: 'E',
             points: 1,
             ephemeral: false,
             is_blank: false,
         });
-        tray.letters[6] = Some(Letter{
+        tray.letters[6] = Some(Letter {
             text: 'D',
             points: 1,
             ephemeral: false,
@@ -1048,7 +1046,5 @@ mod tests {
         println!("Available moves are {:?}", all_moves);
 
         assert!(all_moves.is_empty());
-
     }
-
 }