piece display change and move constant to types.ts

src/lib/chess/types.ts

@@ -10,3 +10,35 @@ export enum Piece {
   WHITE = 8,
   BLACK = 16,
 }
+
+export const CHAR_TO_PIECE: Record<string, number> = {
+  "-": Piece.EMPTY,
+  "K": Piece.WHITE | Piece.KING,
+  "Q": Piece.WHITE | Piece.QUEEN,
+  "R": Piece.WHITE | Piece.ROOK,
+  "B": Piece.WHITE | Piece.BISHOP,
+  "N": Piece.WHITE | Piece.KNIGHT,
+  "P": Piece.WHITE | Piece.PAWN,
+  "k": Piece.BLACK | Piece.KING,
+  "q": Piece.BLACK | Piece.QUEEN,
+  "r": Piece.BLACK | Piece.ROOK,
+  "b": Piece.BLACK | Piece.BISHOP,
+  "n": Piece.BLACK | Piece.KNIGHT,
+  "p": Piece.BLACK | Piece.PAWN,
+};
+
+export const PIECE_TO_CHAR: Record<number, string> = {
+  [Piece.EMPTY]: "-",
+  [Piece.WHITE | Piece.KING]: "K",
+  [Piece.WHITE | Piece.QUEEN]: "Q",
+  [Piece.WHITE | Piece.ROOK]: "R",
+  [Piece.WHITE | Piece.BISHOP]: "B",
+  [Piece.WHITE | Piece.KNIGHT]: "N",
+  [Piece.WHITE | Piece.PAWN]: "P",
+  [Piece.BLACK | Piece.KING]: "k",
+  [Piece.BLACK | Piece.QUEEN]: "q",
+  [Piece.BLACK | Piece.ROOK]: "r",
+  [Piece.BLACK | Piece.BISHOP]: "b",
+  [Piece.BLACK | Piece.KNIGHT]: "n",
+  [Piece.BLACK | Piece.PAWN]: "p",
+}

src/lib/chess/utils.ts

@@ -1,24 +1,6 @@
-import { Piece } from "./types";
-
-// export function fen2array(fen: string): Int8Array<ArrayBuffer> {
-// }
+import { CHAR_TO_PIECE, Piece } from "./types";
 
 export const startFEN = "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0";
-const CHAR_TO_PIECE: Record<string, number> = {
-  "-": Piece.EMPTY,
-  "K": Piece.WHITE | Piece.KING,
-  "Q": Piece.WHITE | Piece.QUEEN,
-  "R": Piece.WHITE | Piece.ROOK,
-  "B": Piece.WHITE | Piece.BISHOP,
-  "N": Piece.WHITE | Piece.KNIGHT,
-  "P": Piece.WHITE | Piece.PAWN,
-  "k": Piece.BLACK | Piece.KING,
-  "q": Piece.BLACK | Piece.QUEEN,
-  "r": Piece.BLACK | Piece.ROOK,
-  "b": Piece.BLACK | Piece.BISHOP,
-  "n": Piece.BLACK | Piece.KNIGHT,
-  "p": Piece.BLACK | Piece.PAWN,
-};
 
 export class Board {
   public board = new Int8Array(8 ** 2);

src/routes/+page.svelte

@@ -1,4 +1,5 @@
 <script lang="ts">
+  import { PIECE_TO_CHAR } from "$lib/chess/types";
   import { Board, startFEN } from "$lib/chess/utils";
 
   const board = new Board();
@@ -18,7 +19,7 @@
       {index % 2 === Math.floor(index / 8) % 2 ? 'bg-orange-200 text-stone-800' : 'bg-amber-800 text-stone-200'}
     ">
       <span class="absolute top-0 left-0">{showIndex ? index : ''}</span>
-      {#if square}<img src="assets/{square}.svg" alt="p{square}" class="h-18 aspect-square"/>{/if}
+      {#if square}<img src="assets/{PIECE_TO_CHAR[square]}.svg" alt="{PIECE_TO_CHAR[square]}" class="h-18 aspect-square"/>{/if}
     </div>
   {/each}
 </div>