IAS/connectfour2.php

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2016-06-15 00:45:35 +02:00
<?php
/*
Bot for connectfour https://botsarena.tinad.fr/connectFour
by Gnieark https://blog-du-grouik.tinad.fr/ june 2016
GNU GPL License
+--+--+--+--+--+--+--+
5 | | | | | | | |
+--+--+--+--+--+--+--+
4 | | | | | | | |
+--+--+--+--+--+--+--+
3 | | | | | | | |
+--+--+--+--+--+--+--+
2 | | | | | | | |
+--+--+--+--+--+--+--+
1 | | | | | | | |
+--+--+--+--+--+--+--+
0 | | | | | | | |
+--+--+--+--+--+--+--+
0 1 2 3 4 5 6
*/
header('Access-Control-Allow-Origin: *');
header('Access-Control-Allow-Methods: GET, POST');
header('Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept');
function can_win($line,$myChar){
//retourne la position du caractere a remplacer dans la ligne pour gagner
if (strpos("+".$myChar.$myChar.$myChar,$line) !== false ){
return strpos("+".$myChar.$myChar.$myChar,$line);
}
if (strpos($myChar.$myChar.$myChar."+",$line) !== false ){
return strpos($myChar.$myChar.$myChar."+",$line) + 3;
}
return false;
}
function can_loose($line,$hisChar){
//je pourrai perdre aux 2 prochains tours de jeu
// retourne la place du caractere à remplacer pour éviter ça
if (strpos("+".$hisChar.$hisChar.$hisChar,$line) !== false ){
return strpos("+".$hisChar.$hisChar.$hisChar,$line);
}
if (strpos($hisChar.$hisChar.$hisChar."+",$line) !== false ){
return strpos($hisChar.$hisChar.$hisChar."+",$line) + 3;
}
if (strpos("+".$hisChar.$hisChar."+",$line) !== false ){
return strpos("+".$hisChar.$hisChar."+",$line);
}
return false;
}
//replace "" by " ", it will simplify my code.
$in=str_replace('""','"_"',file_get_contents('php://input'));
$params=json_decode($in, TRUE);
switch($params['action']){
case "init":
echo '{"name":"Gnieark"}';
break;
case "play-turn":
//find $opponent and clean grid
for($x = 0; $x < 7 ; $x++){
for($y = 0; $y < 6 ; $y++){
//find opponent
if(($params['board'][$y][$x] <> "_" ) && ($params['board'][$y][$x] <> $params['you'] )){
$opponent= $params['board'][$y][$x];
}
//tester si la case est jouable (s'il y a un support en dessous)
if (($params['board'][$y][$x] == "_" )
AND (($y==0) OR ($params['board'][$y - 1][$x] <> "_"))
){
//la case est jouable, je la marque par un "+"
$params['board'][$y][$x] = "+";
}
}
}
if((!isset($opponent)) && ($params['you'] == "X")){
$opponent="O";
}elseif(!isset($opponent)){
$opponent="X";
}
//transformer la grille en lignes horizontales, verticales et diagonales
//verticales
for($x = 0; $x <7; $x ++){
$colStr="";
for($y = 0; $y <6; $y ++){
$colStr.= $params['board'][$y][$x];
}
if(can_win($colStr,$params['you']) !== false){
echo '{"play":'.$x.'}';
die;
}
if (can_loose($colStr,$opponent) !== false){
$colForNoLose = $x;
}
}
//horizontales
for($y = 0; $y <6; $y ++){
$lnStr="";
for($x = 0; $x <7; $x ++){
$lnStr.= $params['board'][$y][$x];
}
if(can_win($lnStr,$params['you']) !== false){
echo '{"play":'.can_win($lnStr,$params['you']).'}';
die;
}
if (can_loose($lnStr,$opponent) !== false){
$colForNoLose = can_loose($lnStr,$opponent);
}
}
//tester seulement les diagonales >= 4 cases
for ($k = 0; $k < 4; $k ++){
//diagonale /
$diagStr="";
for($x=$k , $y=0; isset($params['board'][$y][$x]); $x++, $y++){
$diagStr.=$params['board'][$y][$x];
}
if(can_win($diagStr,$params['you']) !== false){
echo '{"play":'.$x.'}';
die;
}
if (can_loose($diagStr,$opponent) !== false){
$colForNoLose = $x;
}
//diagonale \
$diagStr="";
for($x=$k , $y=5; isset($params['board'][$y][$x]); $x++, $y--){
$diagStr.=$params['board'][$y][$x];
}
if(can_win($diagStr,$params['you']) !== false){
echo '{"play":'.$x.'}';
die;
}
if (can_loose($diagStr,$opponent) !== false){
$colForNoLose = $x;
}
}
for ($k = 0; $k < 3; $k ++){
//diagonale /
$diagStr="";
for($x = 0, $y = $k ; isset($params['board'][$y][$x]); $x++, $y++){
$diagStr.=$params['board'][$y][$x];
}
if(can_win($diagStr,$params['you']) !== false){
echo '{"play":'.$x.'}';
die;
}
if (can_loose($diagStr,$opponent) !== false){
$colForNoLose = $x;
}
}
for ($k = 3 ; $k < 6 ; $k++){
//diagonales \
$diagStr="";
for($x=0 , $y=$k isset($params['board'][$y][$x]); $x++, $y--){
$diagStr.=$params['board'][$y][$x];
}
if(can_win($diagStr,$params['you']) !== false){
echo '{"play":'.$x.'}';
die;
}
if (can_loose($diagStr,$opponent) !== false){
$colForNoLose = $x;
}
}
//si j'arrive là, je ne gagne pas à ce tour
if(isset($colForNoLose)){
echo '{"play":'.$colForNoLose.'}';
die;
}
//still there? random
$colAvailable=array();
//dont play on full colomns
for($i=0;$i<7;$i++){
if(($grid[5][$i] == "+") OR ($grid[5][$i] == "_")){
$colAvailable[]=$i;
}
}
shuffle($colAvailable);
echo '{"play":'.$colAvailable[0].'}';
//echo '{"play":"'.better_col($params['board'],$params['you'],$opponent,0).'"}';
break;
default:
break;
}