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Implement the basic rules of Go #40

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savanni merged 13 commits from feature/go-rules into main 2023-05-04 02:34:40 +00:00
Conversation 0 Commits 13 Files Changed 14 +248 -47
6 changed files with 248 additions and 47 deletions
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34
kifu/kifu-core/Cargo.lock generated
View File

@ -49,6 +49,7 @@ name = "kifu-core"
version = "0.1.0"
dependencies = [
"grid",
"thiserror",
"tokio",
]
@ -209,6 +210,37 @@ dependencies = [
"unicode-ident",
]
[[package]]
name = "syn"
version = "2.0.12"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "79d9531f94112cfc3e4c8f5f02cb2b58f72c97b7efd85f70203cc6d8efda5927"
dependencies = [
"proc-macro2",
"quote",
"unicode-ident",
]
[[package]]
name = "thiserror"
version = "1.0.40"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "978c9a314bd8dc99be594bc3c175faaa9794be04a5a5e153caba6915336cebac"
dependencies = [
"thiserror-impl",
]
[[package]]
name = "thiserror-impl"
version = "1.0.40"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "f9456a42c5b0d803c8cd86e73dd7cc9edd429499f37a3550d286d5e86720569f"
dependencies = [
"proc-macro2",
"quote",
"syn 2.0.12",
]
[[package]]
name = "tokio"
version = "1.26.0"
@ -237,7 +269,7 @@ checksum = "d266c00fde287f55d3f1c3e96c500c362a2b8c695076ec180f27918820bc6df8"
dependencies = [
"proc-macro2",
"quote",
"syn",
"syn 1.0.109",
]
[[package]]

5
kifu/kifu-core/Cargo.toml
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@ -6,5 +6,6 @@ edition = "2021"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
tokio = { version = "1.26", features = [ "full" ] }
grid = { version = "0.9" }
tokio = { version = "1.26", features = [ "full" ] }
grid = { version = "0.9" }
thiserror = { version = "1" }

165
kifu/kifu-core/src/board.rs
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@ -1,13 +1,6 @@
use crate::{Color, Size};
use grid::Grid;
use crate::{BoardError, Color, Size};
use std::collections::HashSet;
#[derive(Clone, Debug, PartialEq)]
pub enum Error {
InvalidPosition,
SelfCapture,
}
#[derive(Clone, Debug)]
pub struct Board {
pub size: Size,
@ -16,15 +9,15 @@ pub struct Board {
impl std::fmt::Display for Board {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> Result<(), std::fmt::Error> {
print!(" ");
write!(f, " ")?;
// for c in 'A'..'U' {
for c in 0..19 {
print!("{:2}", c);
write!(f, "{:2}", c)?;
}
println!("");
writeln!(f, "")?;
for row in 0..self.size.height {
print!(" {:2}", row);
write!(f, " {:2}", row)?;
for column in 0..self.size.width {
match self.stone(&Coordinate { column, row }) {
None => write!(f, " .")?,
@ -38,6 +31,26 @@ impl std::fmt::Display for Board {
}
}
impl PartialEq for Board {
fn eq(&self, other: &Self) -> bool {
if self.size != other.size {
return false;
}
for group in self.groups.iter() {
if !other.groups.contains(&group) {
return false;
}
}
for group in other.groups.iter() {
if !self.groups.contains(&group) {
return false;
}
}
return true;
}
}
impl Board {
pub fn new() -> Self {
Self {
@ -49,12 +62,12 @@ impl Board {
}
}
pub fn from_coordinates(coordinates: impl Iterator<Item = (Coordinate, Color)>) -> Self {
let mut s = Self::new();
for (coordinate, color) in coordinates {
s.place_stone(coordinate, color);
}
s
pub fn from_coordinates(
mut coordinates: impl Iterator<Item = (Coordinate, Color)>,
) -> Result<Self, BoardError> {
coordinates.try_fold(Self::new(), |board, (coordinate, color)| {
board.place_stone(coordinate, color)
})
}
}
@ -65,13 +78,11 @@ pub struct Coordinate {
}
impl Board {
pub fn place_stone(&mut self, coordinate: Coordinate, color: Color) -> Result<(), Error> {
pub fn place_stone(mut self, coordinate: Coordinate, color: Color) -> Result<Self, BoardError> {
if let Some(_) = self.stone(&coordinate) {
return Err(Error::InvalidPosition);
return Err(BoardError::InvalidPosition);
}
let old_groups = self.groups.clone();
let mut friendly_group = self
.adjacencies(&coordinate)
.into_iter()
@ -99,11 +110,10 @@ impl Board {
}
if self.liberties(&friendly_group) == 0 {
self.groups = old_groups;
return Err(Error::SelfCapture);
return Err(BoardError::SelfCapture);
}
Ok(())
Ok(self)
}
pub fn stone(&self, coordinate: &Coordinate) -> Option<Color> {
@ -268,7 +278,8 @@ mod test {
(Coordinate { column: 18, row: 1 }, Color::White),
]
.into_iter(),
);
)
.unwrap();
test(board);
}
@ -307,7 +318,8 @@ mod test {
),
]
.into_iter(),
);
)
.unwrap();
assert!(board.group(&Coordinate { column: 18, row: 3 }).is_none());
assert_eq!(
board
@ -494,8 +506,7 @@ mod test {
#[test]
fn it_finds_adjacent_groups() {
with_example_board(|mut board| {
println!("{}", board);
with_example_board(|board| {
let group = board
.group(&Coordinate { column: 0, row: 0 })
.cloned()
@ -512,17 +523,23 @@ mod test {
#[test]
fn surrounding_a_group_removes_it() {
with_example_board(|mut board| {
board.place_stone(Coordinate { column: 10, row: 9 }, Color::Black);
with_example_board(|board| {
let board = board
.place_stone(Coordinate { column: 10, row: 9 }, Color::Black)
.unwrap();
assert!(board.stone(&Coordinate { column: 9, row: 9 }).is_none());
board.place_stone(Coordinate { column: 2, row: 18 }, Color::Black);
let board = board
.place_stone(Coordinate { column: 2, row: 18 }, Color::Black)
.unwrap();
assert!(board.stone(&Coordinate { column: 0, row: 18 }).is_none());
assert!(board.stone(&Coordinate { column: 1, row: 18 }).is_none());
assert!(board.stone(&Coordinate { column: 0, row: 17 }).is_none());
assert!(board.group(&Coordinate { column: 0, row: 18 }).is_none());
board.place_stone(Coordinate { column: 5, row: 18 }, Color::White);
let board = board
.place_stone(Coordinate { column: 5, row: 18 }, Color::White)
.unwrap();
assert!(board.stone(&Coordinate { column: 4, row: 17 }).is_none());
assert!(board.stone(&Coordinate { column: 5, row: 17 }).is_none());
assert!(board.stone(&Coordinate { column: 6, row: 17 }).is_none());
@ -533,16 +550,84 @@ mod test {
#[test]
fn self_capture_is_forbidden() {
with_example_board(|mut board| {
let res = board.place_stone(Coordinate { column: 18, row: 0 }, Color::Black);
assert_eq!(res, Err(Error::SelfCapture));
with_example_board(|board| {
{
let board = board.clone();
let res = board.place_stone(Coordinate { column: 18, row: 0 }, Color::Black);
assert_eq!(res, Err(BoardError::SelfCapture));
}
let res = board.place_stone(Coordinate { column: 5, row: 18 }, Color::Black);
assert_eq!(res, Err(Error::SelfCapture));
{
let board = board.clone();
let res = board.place_stone(Coordinate { column: 5, row: 18 }, Color::Black);
assert_eq!(res, Err(BoardError::SelfCapture));
}
});
}
fn captures_preceed_self_capture() {
assert!(false);
#[test]
fn validate_group_comparisons() {
{
let b1 = Board::from_coordinates(
vec![(Coordinate { column: 7, row: 9 }, Color::White)].into_iter(),
)
.unwrap();
let b2 = Board::from_coordinates(
vec![(Coordinate { column: 7, row: 9 }, Color::White)].into_iter(),
)
.unwrap();
assert_eq!(b1, b2);
}
{
let b1 = Board::from_coordinates(
vec![
(Coordinate { column: 7, row: 9 }, Color::White),
(Coordinate { column: 8, row: 10 }, Color::White),
]
.into_iter(),
)
.unwrap();
let b2 = Board::from_coordinates(
vec![
(Coordinate { column: 8, row: 10 }, Color::White),
(Coordinate { column: 7, row: 9 }, Color::White),
]
.into_iter(),
)
.unwrap();
assert_eq!(b1, b2);
}
}
#[test]
fn two_boards_can_be_compared() {
let board = Board::from_coordinates(
vec![
(Coordinate { column: 7, row: 9 }, Color::White),
(Coordinate { column: 8, row: 8 }, Color::White),
(Coordinate { column: 8, row: 10 }, Color::White),
(Coordinate { column: 9, row: 9 }, Color::White),
(Coordinate { column: 10, row: 9 }, Color::Black),
(Coordinate { column: 9, row: 8 }, Color::Black),
(Coordinate { column: 9, row: 10 }, Color::Black),
]
.into_iter(),
)
.unwrap();
let b1 = board
.clone()
.place_stone(Coordinate { column: 8, row: 9 }, Color::Black)
.unwrap();
let b2 = b1
.clone()
.place_stone(Coordinate { column: 9, row: 9 }, Color::White)
.unwrap();
assert_eq!(board, b2);
}
}

2
kifu/kifu-core/src/lib.rs
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@ -2,7 +2,7 @@ mod api;
pub use api::{CoreApp, Request, Response};
mod types;
pub use types::{Color, Size};
pub use types::{BoardError, Color, Size};
pub mod ui;
mod board;

88
kifu/kifu-core/src/types.rs
View File

@ -3,6 +3,17 @@ use crate::{
board::{Board, Coordinate},
};
use std::time::Duration;
use thiserror::Error;
#[derive(Debug, PartialEq, Error)]
pub enum BoardError {
#[error("Position is invalid")]
InvalidPosition,
#[error("Self-capture is forbidden")]
SelfCapture,
#[error("Ko")]
Ko,
}
#[derive(Clone, Copy, Debug, PartialEq, Hash, Eq)]
pub enum Color {
@ -80,6 +91,8 @@ pub struct Player {
pub struct GameState {
pub board: Board,
pub past_positions: Vec<Board>,
pub conversation: Vec<String>,
pub current_player: Color,
@ -94,6 +107,7 @@ impl GameState {
fn new() -> GameState {
GameState {
board: Board::new(),
past_positions: vec![],
conversation: vec![],
current_player: Color::Black,
white_player: Player {
@ -109,11 +123,79 @@ impl GameState {
}
}
fn place_stone(&mut self, coordinate: Coordinate) {
self.board.place_stone(coordinate, self.current_player);
fn place_stone(&mut self, coordinate: Coordinate) -> Result<(), BoardError> {
let board = self.board.clone();
let new_board = board.place_stone(coordinate, self.current_player)?;
println!("past positions: {}", self.past_positions.len());
if self.past_positions.contains(&new_board) {
return Err(BoardError::Ko);
}
self.past_positions.push(self.board.clone());
self.board = new_board;
match self.current_player {
Color::White => self.current_player = Color::Black,
Color::Black => self.current_player = Color::White,
}
};
Ok(())
}
}
#[cfg(test)]
mod test {
use super::*;
#[test]
fn current_player_changes_after_move() {
let mut state = GameState::new();
assert_eq!(state.current_player, Color::Black);
state.place_stone(Coordinate { column: 9, row: 9 }).unwrap();
assert_eq!(state.current_player, Color::White);
}
#[test]
fn current_player_remains_the_same_after_self_capture() {
let mut state = GameState::new();
state.board = Board::from_coordinates(
vec![
(Coordinate { column: 17, row: 0 }, Color::White),
(Coordinate { column: 17, row: 1 }, Color::White),
(Coordinate { column: 18, row: 1 }, Color::White),
]
.into_iter(),
)
.unwrap();
state.current_player = Color::Black;
assert_eq!(
state.place_stone(Coordinate { column: 18, row: 0 }),
Err(BoardError::SelfCapture)
);
assert_eq!(state.current_player, Color::Black);
}
#[test]
fn ko_rules_are_enforced() {
let mut state = GameState::new();
state.board = Board::from_coordinates(
vec![
(Coordinate { column: 7, row: 9 }, Color::White),
(Coordinate { column: 8, row: 8 }, Color::White),
(Coordinate { column: 8, row: 10 }, Color::White),
(Coordinate { column: 9, row: 9 }, Color::White),
(Coordinate { column: 10, row: 9 }, Color::Black),
(Coordinate { column: 9, row: 8 }, Color::Black),
(Coordinate { column: 9, row: 10 }, Color::Black),
]
.into_iter(),
)
.unwrap();
state.place_stone(Coordinate { column: 8, row: 9 }).unwrap();
assert_eq!(
state.place_stone(Coordinate { column: 9, row: 9 }),
Err(BoardError::Ko)
);
}
}

1
kifu/kifu-gtk/Cargo.lock generated
View File

@ -667,6 +667,7 @@ name = "kifu-core"
version = "0.1.0"
dependencies = [
"grid",
"thiserror",
"tokio",
]