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Copy pathbase.ts
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110 lines (95 loc) · 2.26 KB
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// Copyright 2018 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
const COL_LABELS = 'ABCDEFGHJKLMNOPQRST';
enum Color {
Empty,
Black,
White,
}
function otherColor(color: Color) {
if (color != Color.White && color != Color.Black) {
throw new Error(`invalid color ${color}`);
}
return color == Color.White ? Color.Black : Color.White;
}
function stonesEqual(a: Color[], b: Color[]) {
if (a.length != b.length) {
throw new Error(
`Expected arrays of equal length, got lengths ${a.length} & ${b.length}`);
}
for (let i = 0; i < a.length; ++i) {
if (a[i] != b[i]) {
return false;
}
}
return true;
}
enum BoardSize {
Nine = 9,
Nineteen = 19,
}
let N = BoardSize.Nineteen;
function setBoardSize(size: number) {
if (size == BoardSize.Nine || size == BoardSize.Nineteen) {
N = size;
} else {
throw new Error(`Unsupported board size ${size}`);
}
}
// Canvas coordinate.
interface Coord {
x: number;
y: number;
}
// Point on the board.
interface Point {
row: number;
col: number;
}
type Move = Point | 'pass' | 'resign';
function moveIsPoint(move: Nullable<Move>): move is Point {
return move != null && move != 'pass' && move != 'resign';
}
function toKgs(move: Move) {
if (move == 'pass' || move == 'resign') {
return move;
}
let row = N - move.row;
let col = COL_LABELS[move.col];
return `${col}${row}`;
}
function movesEqual(a: Nullable<Move>, b: Nullable<Move>) {
if (moveIsPoint(a) && moveIsPoint(b)) {
return a.row == b.row && a.col == b.col;
} else {
return a == b;
}
}
type Nullable<T> = T | null;
export {
BoardSize,
COL_LABELS,
Color,
Coord,
Move,
N,
Nullable,
Point,
moveIsPoint,
movesEqual,
otherColor,
setBoardSize,
stonesEqual,
toKgs,
}