i need help finding the chess.php file from the book “Build your own ajax web applications” please…
thanks in advance
mike.
Hi Mike and welcome to SitePoint.
That book was originally released in 2006 so a bit of archive digging reveales:
Chess.php
<?php
/*
* Copyright 2006 SitePoint Pty. Ltd, [SitePoint » Web Design, Web Development, Freelancing, Tech News and more](http://www.sitepoint.com)
*
* 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.
*/
define('NEW_GAME', '{"lastMove":{"movePiece": null,"takePieceId":null,"moveTime":null},"pieceList":{"white_r1":{"color":"white","id":"white_r1","pos":[0,0],"origPos":[]},"white_n1":{"color":"white","id":"white_n1","pos":[0,1],"origPos":[]},"white_b1":{"color":"white","id":"white_b1","pos":[0,2],"origPos":[]},"white_q":{"color":"white","id":"white_q","pos":[0,3],"origPos":[]},"white_k":{"color":"white","id":"white_k","pos":[0,4],"origPos":[]},"white_b2":{"color":"white","id":"white_b2","pos":[0,5],"origPos":[]},"white_n2":{"color":"white","id":"white_n2","pos":[0,6],"origPos":[]},"white_r2":{"color":"white","id":"white_r2","pos":[0,7],"origPos":[]},"white_p1":{"color":"white","id":"white_p1","pos":[1,0],"origPos":[]},"white_p2":{"color":"white","id":"white_p2","pos":[1,1],"origPos":[]},"white_p3":{"color":"white","id":"white_p3","pos":[1,2],"origPos":[]},"white_p4":{"color":"white","id":"white_p4","pos":[1,3],"origPos":[]},"white_p5":{"color":"white","id":"white_p5","pos":[1,4],"origPos":[]},"white_p6":{"color":"white","id":"white_p6","pos":[1,5],"origPos":[]},"white_p7":{"color":"white","id":"white_p7","pos":[1,6],"origPos":[]},"white_p8":{"color":"white","id":"white_p8","pos":[1,7],"origPos":[]},"black_r1":{"color":"black","id":"black_r1","pos":[7,0],"origPos":[]},"black_n1":{"color":"black","id":"black_n1","pos":[7,1],"origPos":[]},"black_b1":{"color":"black","id":"black_b1","pos":[7,2],"origPos":[]},"black_q":{"color":"black","id":"black_q","pos":[7,3],"origPos":[]},"black_k":{"color":"black","id":"black_k","pos":[7,4],"origPos":[]},"black_b2":{"color":"black","id":"black_b2","pos":[7,5],"origPos":[]},"black_n2":{"color":"black","id":"black_n2","pos":[7,6],"origPos":[]},"black_r2":{"color":"black","id":"black_r2","pos":[7,7],"origPos":[]},"black_p1":{"color":"black","id":"black_p1","pos":[6,0],"origPos":[]},"black_p2":{"color":"black","id":"black_p2","pos":[6,1],"origPos":[]},"black_p3":{"color":"black","id":"black_p3","pos":[6,2],"origPos":[]},"black_p4":{"color":"black","id":"black_p4","pos":[6,3],"origPos":[]},"black_p5":{"color":"black","id":"black_p5","pos":[6,4],"origPos":[]},"black_p6":{"color":"black","id":"black_p6","pos":[6,5],"origPos":[]},"black_p7":{"color":"black","id":"black_p7","pos":[6,6],"origPos":[]},"black_p8":{"color":"black","id":"black_p8","pos":[6,7],"origPos":[]}}}');
require_once "JSON.php";
$json = new Services_JSON();
$input = implode("\\r\
", file('php://input'));
$cmd = $json->decode($input);
$game = Game::instance();
$resp = new Response();
$out = '';
switch ($cmd->cmdName) {
case 'load':
$out = '{"respStatus":"ok", "respData":'.$game->getFromFile().'}';
break;
case 'wipe':
$game->saveToFile(NEW_GAME);
$out = '{"respStatus":"ok", "respData":'.NEW_GAME.'}';
break;
case 'poll':
$lastMove = $cmd->cmdData;
$game->load();
if (($game->state->lastMove->moveTime > $lastMove->moveTime)||
($lastMove->moveTime && !$game->state->lastMove->moveTime)) {
$out = '{"respStatus":"update", "respData":'.$game->getFromFile().'}';
}
else {
$resp->respStatus = 'nochange';
$out = $json->encode($resp);
}
break;
case 'move':
$move = $cmd->cmdData;
$movePieceId = $move->movePiece->id;
$takePieceId = $move->takePieceId;
$moveTime = date('Y-m-d H:i:s', mktime());
$game->load();
$game->state->pieceList->$movePieceId->pos[0] = $move->movePiece->pos[0];
$game->state->pieceList->$movePieceId->pos[1] = $move->movePiece->pos[1];
if ($takePieceId) {
unset($game->state->pieceList->$takePieceId);
}
$game->state->lastMove->movePiece = $move->movePiece;
$game->state->lastMove->moveTime = $moveTime;
$game->state->lastMove->takePieceId = $takePieceId;
$resp->respStatus = 'ok';
$resp->respData->lastMove = $game->state->lastMove;
$out = $json->encode($resp);
$game->save();
break;
}
header('Content-Type: text/plain');
print $out;
class Game {
function Game() {
$this->json = new Services_JSON();
$this->state = new GameState();
$this->filePath = 'chessboard.txt';
}
function saveToFile($str) {
if (is_writable($this->filePath)) {
file_put_contents($this->filePath, $str) or die('Could not write to file '.$this->filePath);
}
else {
die('File is not writable');
}
}
function getFromFile() {
if (is_readable($this->filePath)) {
$str = file_get_contents($this->filePath) or die('Could not get file contents from '.$this->filePath);
return $str;
}
else {
die('File '.$this->filePath.' is not readable');
}
}
function load() {
$str = $this->getFromFile();
$this->state = $this->json->decode($str);
}
function save() {
$str = $this->json->encode($this->state);
$this->saveToFile($str);
}
function instance() {
static $instance = null;
if($instance === null) {
$instance = new Game();
}
return $instance;
}
}
class Response {
function Response($respStatus = '', $respData = '') {
$this->respStatus = $respStatus;
$this->respData = $respData;
}
}
class GameState {
function GameState($lastMove = null, $pieceList = null) {
$this->lastMove = $lastMove;
$this->pieceList = $pieceList;
}
}
?>
[noparse]
Dont forget to check the errata list: http://www.sitepoint.com/books/ajax1/errata.php
and here is a code archive: http://www.sitepoint.com/books/ajax1/code.php
[/noparse]
thanks, I needed that…