new class js -advanced

02_advanced/MATERIAL/advanced-js/lesson_04/examples/chess.js

@@ -0,0 +1,50 @@
+'use strict';
+
+const board2string = (board) => board.map((row) => row.join('')).join('\n');
+
+const execMove = (board, move) => {
+  const originX = fieldToXPosition(originField(move));
+  const originY = fieldToYPosition(originField(move));
+  const targetX = fieldToXPosition(targetField(move));
+  const targetY = fieldToYPosition(targetField(move));
+
+  board[targetY][targetX] = board[originY][originX];
+  board[originY][originX] = emptyBoard()[originY][originX];
+  return board;
+};
+
+const boardInStartPosition = () => [
+  ['♜', '♞', '♝', '♛', '♚', '♝', '♞', '♜'],
+  ['♟', '♟', '♟', '♟', '♟', '♟', '♟', '♟'],
+  ['◻', '▦', '◻', '▦', '◻', '▦', '◻', '▦'],
+  ['▦', '◻', '▦', '◻', '▦', '◻', '▦', '◻'],
+  ['◻', '▦', '◻', '▦', '◻', '▦', '◻', '▦'],
+  ['▦', '◻', '▦', '◻', '▦', '◻', '▦', '◻'],
+  ['♙', '♙', '♙', '♙', '♙', '♙', '♙', '♙'],
+  ['♖', '♘', '♗', '♕', '♔', '♗', '♘', '♖'],
+];
+
+const emptyBoard = () => [
+  ['◻', '▦', '◻', '▦', '◻', '▦', '◻', '▦'],
+  ['▦', '◻', '▦', '◻', '▦', '◻', '▦', '◻'],
+  ['◻', '▦', '◻', '▦', '◻', '▦', '◻', '▦'],
+  ['▦', '◻', '▦', '◻', '▦', '◻', '▦', '◻'],
+  ['◻', '▦', '◻', '▦', '◻', '▦', '◻', '▦'],
+  ['▦', '◻', '▦', '◻', '▦', '◻', '▦', '◻'],
+  ['◻', '▦', '◻', '▦', '◻', '▦', '◻', '▦'],
+  ['▦', '◻', '▦', '◻', '▦', '◻', '▦', '◻'],
+];
+
+const originField = (move) => move.substr(0, 2);
+const targetField = (move) => move.substr(2);
+
+const fieldToXPosition = (field) => letterToChessIndex(field.charAt(0));
+const fieldToYPosition = (field) => numberToChessIndex(field.charAt(1));
+const letterToChessIndex = (letter) => 'abcdefgh'.indexOf(letter);
+const numberToChessIndex = (num) => 8 - num;
+
+console.log(board2string(boardInStartPosition()));
+
+console.log('\n');
+
+console.log(board2string(execMove(boardInStartPosition(), 'e2e4')));