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compare: pavel:799c91fea01d40edad86585573f36feef844e27a
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6279e076ac ... 799c91fea0

Author SHA1 Message Date
Pavel Lutskov
799c91fea0 Prettier index.html 2021-11-14 14:43:32 +01:00
Pavel Lutskov
51e5228145 Implement basic Piece infrastructure 
And the Pawn class
 2021-11-14 14:42:53 +01:00
2 changed files with 171 additions and 9 deletions
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14
frontend/index.html
View File

@@ -1,10 +1,10 @@
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Chess</title>
</head>
<body>
<script type="module" src="main.js"></script>
</body>
<head>
<meta charset="UTF-8" />
<title>Chess</title>
</head>
<body>
<script type="module" src="main.js"></script>
</body>
</html>

166
rs/src/main.rs
View File

@@ -1,3 +1,165 @@
fn main() {
println!("Hello, world!");
use std::marker::PhantomData;
enum Color {
Black,
White,
}
struct Position {
row: Row,
column: Column,
}
impl Position {
fn delta(&self, delta_row_column: (i8, i8)) -> Result<Position, ()> {
let (delta_row, delta_column) = delta_row_column;
Ok(Position {
row: self.row.delta(delta_row)?,
column: self.column.delta(delta_column)?,
})
}
}
#[derive(PartialEq, Clone, Copy)]
enum Row {
_1,
_2,
_3,
_4,
_5,
_6,
_7,
_8,
}
#[derive(PartialEq, Clone, Copy)]
enum Column {
A,
B,
C,
D,
E,
F,
G,
H,
}
trait GridAxis
where
Self: Sized,
Self: Clone,
{
const ALL_VALUES: [Self; 8];
fn new(index: u8) -> Result<Self, ()> {
return Ok(
Self::ALL_VALUES[Self::validate_index(index)? as usize].clone()
);
}
fn validate_index(index: u8) -> Result<u8, ()> {
if index as usize >= Self::ALL_VALUES.len() {
Err(())
} else {
Ok(index)
}
}
fn get_index(&self) -> u8;
fn delta(&self, delta: i8) -> Result<Self, ()> {
let highest = Self::ALL_VALUES.len() as i8 - 1;
if delta > highest
|| delta < -highest
|| (delta < 0 && self.get_index() < delta.abs() as u8)
|| (delta > 0 && self.get_index() + delta as u8 > highest as u8)
{
Err(())
} else {
Ok(Self::new(((self.get_index() as i8) + delta) as u8)?)
}
}
}
impl GridAxis for Row {
const ALL_VALUES: [Row; 8] = [
Row::_1,
Row::_2,
Row::_3,
Row::_4,
Row::_5,
Row::_6,
Row::_7,
Row::_8,
];
fn get_index(&self) -> u8 {
*self as u8
}
}
impl GridAxis for Column {
const ALL_VALUES: [Column; 8] = [
Column::A,
Column::B,
Column::C,
Column::D,
Column::E,
Column::F,
Column::G,
Column::H,
];
fn get_index(&self) -> u8 {
*self as u8
}
}
struct Piece<T> {
position: Position,
color: Color,
piece_type: PhantomData<T>,
}
trait Movement {
fn get_moves(&self) -> Vec<Position>;
fn get_captures(&self) -> Vec<Position>;
}
struct Pawn {}
impl<T> Piece<T> {
fn deltas_to_valid_positions(
&self,
deltas: &Vec<(i8, i8)>,
) -> Vec<Position> {
deltas
.iter()
.filter_map(|&delta_row_column| {
self.position.delta(delta_row_column).ok()
})
.collect()
}
}
impl Piece<Pawn> {
fn get_home_row_direction(&self) -> (Row, i8) {
match self.color {
Color::Black => (Row::_7, -1),
Color::White => (Row::_2, 1),
}
}
}
impl Movement for Piece<Pawn> {
fn get_moves(&self) -> Vec<Position> {
let (home_row, direction) = self.get_home_row_direction();
let deltas: Vec<(i8, i8)> = if self.position.row == home_row {
vec![(1 * direction, 0), (2 * direction, 0)]
} else {
vec![(1 * direction, 0)]
};
self.deltas_to_valid_positions(&deltas)
}
fn get_captures(&self) -> Vec<Position> {
let (_, direction) = self.get_home_row_direction();
let deltas: Vec<(i8, i8)> =
vec![(1 * direction, 1), (1 * direction, -1)];
self.deltas_to_valid_positions(&deltas)
}
}
fn main() {}