more game logic

master
Ondřej Hruška 5 years ago
parent 109220a3f9
commit 82f2713dca
Signed by: MightyPork
GPG Key ID: 2C5FD5035250423D
  1. 319
      Cargo.lock
  2. 2
      Cargo.toml
  3. 221
      src/game.rs
  4. 158
      src/main.rs

319
Cargo.lock generated

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@ -24,18 +156,70 @@ dependencies = [
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@ -8,3 +8,5 @@ edition = "2018"
[dependencies]
rand = "0.7.3"
rustyline = "6.1.2"
failure = "0.1.8"

@ -9,7 +9,16 @@ struct Board([Bin; 24]);
impl Board {
fn can_bear_off(&self, color : Color) -> bool {
for i in (HOME_MAX)+1..=BOARD_MAX {
// this range covers the non-home area of the board
let range = if color == Color::White {
// White's home is low indices
6..=23
} else {
// Black's home is high indices
0..=17
};
for i in range {
match (self.0)[i as usize].as_color() {
Some(c) if c == color => {
return false;
@ -67,10 +76,18 @@ impl Board {
#[derive(Debug,Clone,Copy,PartialEq,Eq)]
pub enum Color {
/// Black, home area 18..=23
Black,
/// White, home area 0..=5
White,
}
impl Display for Color {
fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
write!(f, "{:?}", self) // re-use the debug renderer
}
}
impl Color {
fn opposite(self) -> Color {
match self {
@ -111,8 +128,20 @@ impl Bin {
Color::White => Bin::White(1),
}
},
Bin::Black(n) => Bin::Black(*n + 1),
Bin::White(n) => Bin::White(*n + 1),
Bin::Black(n) => {
if color == Color::Black {
Bin::Black(*n + 1)
} else {
Bin::White(1)
}
},
Bin::White(n) => {
if color == Color::White {
Bin::White(*n + 1)
} else {
Bin::Black(1)
}
}
});
}
@ -147,19 +176,17 @@ struct Player {
#[derive(Debug, Clone)]
pub struct State {
move_number : usize,
turn : Color,
board: Board,
roll: Roll,
player : Player,
other : Player,
black : Player,
white : Player,
}
#[derive(Debug,Clone,Copy)]
pub enum Move {
InBoard {
from: u8,
to : u8
},
InBoard(u8, u8),
Enter(u8),
BearOff(u8)
}
@ -256,6 +283,7 @@ impl State {
pub fn start(turn : Option<Color>) -> Self {
// The state is laid out for the white player
let mut state = State {
move_number: 0,
turn: Color::White,
board: Board([
// 1 .. 12 (bottom row, right to left)
@ -286,26 +314,68 @@ impl State {
Bin::White(2), // black player's home side
]),
roll: Roll::new(),
player: Player { born_off: 0, to_place: 0 },
other: Player { born_off: 0, to_place: 0 }
black: Player { born_off: 0, to_place: 0 },
white: Player { born_off: 0, to_place: 0 }
};
if turn.map(|c| c == Color::Black).unwrap_or_else(|| OsRng.gen()) {
// flip the board so black starts
state.switch_sides_mut();
state.turn = Color::Black;
}
state
}
pub fn check_move(&self, mv : Move) -> Result<(), Error> {
pub fn turn(&self) -> (usize, Color) {
(self.move_number, self.turn)
}
fn player(&self) -> &Player {
match self.turn {
Color::Black => &self.black,
Color::White => &self.white,
}
}
fn player_mut(&mut self) -> &mut Player {
match self.turn {
Color::Black => &mut self.black,
Color::White => &mut self.white,
}
}
fn other(&self) -> &Player {
match self.turn {
Color::Black => &self.white,
Color::White => &self.black,
}
}
fn other_mut(&mut self) -> &mut Player {
match self.turn {
Color::Black => &mut self.white,
Color::White => &mut self.black,
}
}
pub fn apply_move(&self, turn : Color, mv : Move) -> Result<Self, Error> {
if turn != self.turn {
return Err(Error::NotYourTurn);
}
print!("{} plays move: ", turn);
let mut next = self.clone();
match mv {
Move::InBoard{from, to} => {
if to > from {
// can only go lower
Move::InBoard(from, to) => {
println!("In-board {} -> {}", from, to);
if (self.turn == Color::White && to >= from) || (self.turn == Color::Black && to <= from) {
return Err(Error::MalformedMove);
}
if self.player.to_place != 0 {
if self.player().to_place != 0 {
return Err(Error::NotAllPlaced);
}
@ -317,15 +387,27 @@ impl State {
return Err(Error::TargetOccupied);
}
let needed = from - to;
let needed = (from as i8 - to as i8).abs() as u8;
if !self.roll.have_equal(needed) {
return Err(Error::NoMatchingRoll);
}
Ok(())
let old_color = next.board.apply_move_mut(from, to);
next.roll.remove_mut(needed);
if let Some(c) = old_color {
if c != self.turn {
println!("{} stone at position {} is hit.", c, to);
// hit opposite color
next.other_mut().to_place += 1;
}
}
},
Move::Enter(pos) => {
if self.player.to_place == 0 {
println!("Enter -> {}", pos);
if self.player().to_place == 0 {
return Err(Error::NothingToPlace);
}
@ -333,7 +415,11 @@ impl State {
return Err(Error::MalformedMove);
}
let needed = 24 - pos;
let needed = if self.turn == Color::White {
24 - pos
} else {
pos + 1
};
if !self.roll.have_equal(needed) {
return Err(Error::NoMatchingRoll);
@ -343,14 +429,27 @@ impl State {
return Err(Error::TargetOccupied);
}
Ok(())
let old_color = next.board.apply_enter_mut(pos, self.turn);
next.roll.remove_mut(needed);
next.player_mut().to_place -= 1;
if let Some(c) = old_color {
if c != self.turn {
println!("{} stone at position {} is hit.", c, pos);
// hit opposite color
next.other_mut().to_place += 1;
}
}
},
Move::BearOff(pos) => {
if pos > HOME_MAX {
println!("Bear off -> {}", pos);
if (self.turn == Color::White && pos > HOME_MAX) || (self.turn == Color::Black && pos < 18) {
return Err(Error::MalformedMove);
}
if self.player.to_place != 0 {
if self.player().to_place != 0 {
return Err(Error::NotAllPlaced);
}
@ -364,66 +463,14 @@ impl State {
// TODO must always bear off the highest possible, if multiple checkers are available
}
Ok(())
},
}
}
pub fn apply_move(&self, turn : Color, mv : Move) -> Result<Self, Error> {
if turn != self.turn {
return Err(Error::NotYourTurn);
}
self.check_move(mv)?;
print!("{:?} plays move: ", turn);
let mut next = self.clone();
match mv {
Move::InBoard { from, to } => {
println!("In-board {} -> {}", from, to);
let old_color = next.board.apply_move_mut(from, to);
let needed = from - to; // move is always downward
next.roll.remove_mut(needed);
if let Some(c) = old_color {
if c != self.turn {
println!("{:?} stone at position {} is hit.", c, to);
// hit opposite color
next.other.to_place += 1;
}
}
},
Move::Enter(pos) => {
println!("Enter -> {}", pos);
let old_color = next.board.apply_enter_mut(pos, self.turn);
let needed = 24 - pos;
next.roll.remove_mut(needed);
next.player.to_place -= 1;
if let Some(c) = old_color {
if c != self.turn {
println!("{:?} stone at position {} is hit.", c, pos);
// hit opposite color
next.other.to_place += 1;
}
}
},
Move::BearOff(pos) => {
println!("Bear off -> {}", pos);
let needed = next.roll.get_equal_or_greater(pos + 1).unwrap();
next.roll.remove_mut(needed);
},
}
if next.roll.remaining_moves.is_empty() {
next.switch_sides_mut();
next.turn = self.turn.opposite();
next.move_number += 1;
next.roll_mut();
// TODO check if any moves are possible with this roll, if not, auto-switch again
@ -441,17 +488,11 @@ impl State {
fn roll_mut(&mut self) {
self.roll = Roll::new();
}
fn switch_sides_mut(&mut self) {
self.board.0.reverse();
mem::swap(&mut self.player, &mut self.other);
self.turn = self.turn.opposite();
}
}
impl Display for State {
fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
write!(f, "\n# {:?} turn, roll ({},{}), moves to play: [{}]\n",
write!(f, "\n# {} turn, roll ({},{}), moves to play: [{}]\n",
self.turn,
self.roll.dice.0,
self.roll.dice.1,
@ -460,14 +501,16 @@ impl Display for State {
write!(f, "# bearing off? {}, born off: {}, to place: {}\n",
if self.board.can_bear_off(self.turn) { "YES" } else { "no" },
self.player.born_off,
self.player.to_place
self.player().born_off,
self.player().to_place
)?;
f.write_str("White <- ")?;
for n in 0..=23 {
write!(f, "{:02} ", n)?;
write!(f, "{:02} ", n+1)?;
}
f.write_char('\n')?;
f.write_str(" -> Black\n")?;
f.write_str(" ")?;
for n in 0..=23 {
match self.board.0[n] {

@ -1,31 +1,157 @@
use crate::game::{Move, Color, Roll};
use rustyline::error::ReadlineError;
use failure::{Fallible, format_err};
mod game;
fn main() {
let g = game::State::start(Some(Color::Black));
let mut game = game::State::start(None);
let g = g.spoof_roll(Roll::from_dice((3, 5)));
let mut rl = rustyline::Editor::<()>::new();
println!("{}", g);
let mut retry = false;
let mut filled = String::new();
'input: loop {
if !retry {
filled.clear();
}
let g = g.apply_move(Color::Black, Move::InBoard { from: 23, to: 20 }).unwrap();
let g = g.apply_move(Color::Black, Move::InBoard { from: 12, to: 7 }).unwrap();
println!("BOARD:\n{}", game);
// White turn
let g = g.spoof_roll(Roll::from_dice((4, 6)));
println!("{}", g);
let (sn, color) = game.turn();
let cmd = rl.readline_with_initial(&format!("{}> ", color), (&filled, ""));
retry = false;
match cmd {
Ok(line) => {
filled = line;
let g = g.apply_move(Color::White, Move::InBoard { from: 23, to: 17 }).unwrap();
let g = g.apply_move(Color::White, Move::InBoard { from: 7, to: 3 }).unwrap();
let line = filled.trim();
if line.is_empty() {
retry = true;
continue 'input;
}
// Black turn, need to place the hit stone
let g = g.spoof_roll(Roll::from_dice((1, 2)));
println!("{}", g);
match parse_input(line) {
Ok(moves) => {
println!("{:?}", moves);
let mut next = game.clone();
for m in moves {
match next.apply_move(color, m) {
Ok(n) => {
next = n;
println!("{}", next);
}
Err(e) => {
println!("Move failed: {:?}", e);
retry = true;
continue 'input;
}
}
}
if next.turn().0 != sn {
game = next;
} else {
println!("Move NOT complete, reverting.");
retry = true;
}
},
Err(e) => {
println!("Parsing failed: {}", e);
retry = true;
continue 'input;
},
}
},
// Err(ReadlineError::Interrupted) => {
// // just clear the line and retry
// retry = true;
// continue 'input;
// }
Err(_) => {
break 'input;
},
}
}
let g = g.apply_move(Color::Black, Move::Enter(22)).unwrap();
// let g = g.spoof_roll(Roll::from_dice((3, 5)));
//
// println!("{}", g);
//
// let g = g.apply_move(Color::Black, Move::InBoard { from: 0, to: 3 }).unwrap();
// let g = g.apply_move(Color::Black, Move::InBoard { from: 11, to: 16 }).unwrap();
//
// // White turn
// let g = g.spoof_roll(Roll::from_dice((4, 6)));
// println!("{}", g);
//
// let g = g.apply_move(Color::White, Move::InBoard { from: 23, to: 17 }).unwrap();
// let g = g.apply_move(Color::White, Move::InBoard { from: 7, to: 3 }).unwrap();
//
// // Black turn, need to place the hit stone
// let g = g.spoof_roll(Roll::from_dice((1, 2)));
// println!("{}", g);
//
// let g = g.apply_move(Color::Black, Move::Enter(1)).unwrap();
//
// let g = g.apply_move(Color::Black, Move::InBoard { from: 3, to: 4 }).unwrap();
//
// println!("{}", g);
}
fn parse_input(line : &str) -> Fallible<Vec<Move>> {
let line = line.trim();
let mut moves = vec![];
let fragments = line.split(',');
// let mut moves = vec![];
for f in fragments {
if !f.contains('/') {
return Err(format_err!("Bad syntax: \"{}\"", f));
}
let halves : Vec<&str> = f.split('/').collect();
if halves[0].is_empty() && halves[1].is_empty() {
return Err(format_err!("Bad syntax: \"{}\"", f));
}
if halves[0].is_empty() {
let to : u8 = halves[1].parse()?;
if to == 0 || to > 24 {
return Err(format_err!("Out of range: {}", to));
}
moves.push(Move::Enter(to - 1));
continue;
}
if halves[1].is_empty() {
let to : u8 = halves[0].parse()?;
if to == 0 || to > 24 {
return Err(format_err!("Out of range: {}", to));
}
moves.push(Move::BearOff(to - 1));
continue;
}
let from : u8 = halves[0].parse()?;
let to : u8 = halves[1].parse()?;
if from == 0 || from > 24 {
return Err(format_err!("Out of range: {}", to));
}
if to == 0 || to > 24 {
return Err(format_err!("Out of range: {}", to));
}
let g = g.apply_move(Color::Black, Move::InBoard { from: 22, to: 21 }).unwrap();
moves.push(Move::InBoard(from - 1, to - 1));
}
println!("{}", g);
Ok(moves)
}

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