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IAS/connectfourLearn.php

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<?php
/*
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* Bot for connectfour https://botsarena.tinad.fr/connectFour
* by Gnieark https://blog-du-grouik.tinad.fr/ june 2016
* GNU GPL License
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*/
header('Access-Control-Allow-Origin: *');
header('Access-Control-Allow-Methods: GET, POST');
header('Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept');
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header('Content-Type: application/json');
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//connexion mysql
require_once("config.php");
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if (!$lnMySQL=mysqli_connect($config['mysql_host'], $config['mysql_user'], $config['mysql_pass'])) {
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error(500,'database connexion failed');
die;
}
mysqli_select_db($lnMySQL,$config['mysql_database']);
mysqli_set_charset($lnMySQL, 'utf8');
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//purge old games
mysqli_query($lnMySQL,"DELETE FROM battleship_current WHERE time < (NOW() - INTERVAL 10 MINUTE)");
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trace
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$trace = "";
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function hash_map($map,$me,$opponent){
$hashMap = "";
foreach($map as $line){
foreach ($line as $cell){
switch($cell){
case $me:
$hashMap.="1";
break;
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case $opponent:
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$hashMap.="2";
break;
default:
$hashMap.="0";
break;
}
}
}
base 16
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return base_convert($hashMap, 3, 16);
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}
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function remenber_previous_lap_is_a_bullshit(){
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global $params, $lnMySQL,$trace;
$trace.="|I Learn it";
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mysqli_query($lnMySQL,
"INSERT INTO battleshipLearn(map, dont_play_col)
SELECT battleship_current.map, battleship_current.play_at
FROM battleship_current
WHERE battleship_current.game_id='".mysqli_real_escape_string($lnMySQL,$params['game-id'])."'
AND battleship_current.player_index='".mysqli_real_escape_string($lnMySQL,$params['player-index'])."';"
);
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}
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function play($map,$colToPlay,$me,$opponent,$gameid,$player_index){
trace
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global $lnMySQL,$trace;
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//save the lap on the database and then send the play response
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mysqli_query($lnMySQL,
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"INSERT INTO battleship_current (game_id,player_index,map,play_at) VALUES
('".mysqli_real_escape_string($lnMySQL,$gameid)."',
'".mysqli_real_escape_string($lnMySQL,$player_index)."',
'".hash_map($map,$me,$opponent)."',
'".$colToPlay."')
ON DUPLICATE KEY UPDATE
map='".hash_map($map,$me,$opponent)."',
play_at='".$colToPlay."';");
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//echo '{"play":'.$colToPlay.',"comment":"'.$trace.'"}';
echo '{"play":'.$colToPlay.',"comment":13}';
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die;
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}
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function can_win($line,$myChar,$depth=0){
//retourne la position du caractere a remplacer dans la ligne pour gagner
$arr=array();
if($depth == 0){
if (strpos($line,"+".$myChar.$myChar.$myChar) !== false ){
$arr[] = strpos($line,"+".$myChar.$myChar.$myChar);
}
if (strpos($line,$myChar."+".$myChar.$myChar) !== false ){
$arr[] = strpos($line,$myChar."+".$myChar.$myChar) + 1;
}
if (strpos($line,$myChar.$myChar."+".$myChar) !== false ){
$arr[] = strpos($line,$myChar.$myChar."+".$myChar) + 2;
}
if (strpos($line,$myChar.$myChar.$myChar."+") !== false ){
$arr[] = strpos($line,$myChar.$myChar.$myChar."+") + 3;
}
}else{
if (strpos($line,"+".$myChar.$myChar."+") !== false ){
$arr[] = strpos($line,"+".$myChar.$myChar."+");
$arr[] = strpos($line,"+".$myChar.$myChar."+") + 3;
}
if (strpos($line,"+".$myChar."+".$myChar) !== false ){
$arr[] = strpos($line,"+".$myChar."+".$myChar);
$arr[] = strpos($line,"+".$myChar."+".$myChar) + 2;
}
if (strpos($line,$myChar."+".$myChar."+") !== false ){
$arr[] = strpos($line,$myChar."+".$myChar."+") + 1;
$arr[] = strpos($line,$myChar."+".$myChar."+") + 3;
}
}
return $arr;
}
function can_loose($line,$hisChar,$depth=0){
//je pourrai perdre aux 2 prochains tours de jeu
// retourne la place du caractere à remplacer pour éviter ça
$arr=array();
if ($depth == 0){
if (strpos($line,"+".$hisChar.$hisChar.$hisChar) !== false ){
$arr[] = strpos($line,"+".$hisChar.$hisChar.$hisChar);
}
if (strpos($line,$hisChar."+".$hisChar.$hisChar) !== false ){
$arr[] = strpos($line,$hisChar."+".$hisChar.$hisChar) + 1;
}
if (strpos($line,$hisChar.$hisChar."+".$hisChar) !== false ){
$arr[] = strpos($line,$hisChar.$hisChar."+".$hisChar) + 2;
}
if (strpos($line,$hisChar.$hisChar.$hisChar."+") !== false ){
$arr[] = strpos($line,$hisChar.$hisChar.$hisChar."+") + 3;
}
}else{
if (strpos($line,"+".$hisChar.$hisChar."+") !== false ){
$arr[] = strpos($line,"+".$hisChar.$hisChar."+");
$arr[] = strpos($line,"+".$hisChar.$hisChar."+") +3;
}
if(strpos($line,"+".$hisChar."+".$hisChar."+") !== false ){
$arr[] = strpos($line,"+".$hisChar."+".$hisChar."+");
$arr[] = strpos($line,"+".$hisChar."+".$hisChar."+") + 2;
$arr[] = strpos($line,"+".$hisChar."+".$hisChar."+") + 4;
}
}
return $arr;
}
function array_merge_and_increment_rigth ($arr1,$arr2,$incr){
foreach($arr2 as $v){
$arr1[] = $v + $incr;
}
return $arr1;
}
function analize($line,$me,$opponent,$isVertical,$decalageX){
/*
* Etudie les lignes fournies
* Joue si une case est gagnante
* Sinon, "peuple" des variables
* qui permettront de prendre une décision
*/
static $colForNoLose = array();
static $colForNoLose1 = array();
static $canWinDepth1 = array();
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global $params;
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if(count(can_win($line,$me,0)) > 0){
if($isVertical){
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play($params['board'],$decalageX,$me,$opponent,$params['game-id'],$params['player-index']);
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}else{
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play($params['board'],(can_win($line,$me,0)[0] + $decalageX),$me,$opponent,$params['game-id'],$params['player-index']);
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}
die;
}
if (count(can_loose($line,$opponent,0)) > 0){
if($isVertical){
$colForNoLose[] = $decalageX;
}else{
$colForNoLose = array_merge_and_increment_rigth($colForNoLose ,can_loose($line,$opponent,0),$decalageX);
}
}
if (count(can_loose($line,$opponent,1)) > 0 ){
if($isVertical){
$colForNoLose1[] = $decalageX;
}else{
$colForNoLose1 = array_merge_and_increment_rigth($colForNoLose1 ,can_loose($line,$opponent,1),$decalageX);
}
}
if(count(can_win($line,$opponent,1)) > 0){
if($isVertical){
$canWinDepth1[] = $decalageX;
}else{
$canWinDepth1= array_merge_and_increment_rigth($canWinDepth1, can_win($line,$me,1), $decalageX);
}
}
return array(
'colForNoLose' => $colForNoLose,
'colForNoLose1' => $colForNoLose1,
'canWinDepth1' => $canWinDepth1
);
}
function should_opponent_win_if_i_play_at($map,$me,$opponent,$colToPlay){
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//j'ouvre l'a possibilité à l'adversaire de jouer au dessus de mon pion
// est-ce une connerie?
if(($map[4][$colToPlay] == $me) OR ($map[4][$colToPlay] == $opponent)){
//top of the grid
return false;
}
for($y = 0; (($map[$y][$colToPlay] <> "+") && ($map[$y][$colToPlay] <> "-")); $y++){
}
$map[$y][$colToPlay] = $me;
$map[$y +1][$colToPlay] = "$opponent";
$y++;
if(isset($map[$y +1][$colToPlay])){
$map[$y +1][$colToPlay] = "+";
}
//tester les lignes qui passent pas $y+1,$colToPlay
$loseStr = $opponent.$opponent.$opponent.$opponent;
//horizontale
$line="";
for($x=0; $x < 7; $x++){
$line.=$map[$y][$x];
}
if(strpos($line,$loseStr) !== false){
return true;
}
//diagonal /
$line="";
if($colToPlay > $y){
$kx=$colToPlay - $y;
$ky = 0;
}else{
$kx = 0;
$ky = $y - $colToPlay;
}
while(isset($map[$ky][$kx])){
$line.=$map[$ky][$kx];
$kx++;
$ky++;
}
if(strpos($line,$loseStr) !== false){
return true;
}
//diagional \
$line = "";
$kx = $colToPlay;
$ky = $y;
while(isset($map[$ky -1][$kx +1])){
$kx++;
$ky--;
}
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while(isset($map[$ky][$kx])){
$line.=$map[$ky][$kx];
$kx--;
$ky++;
}
if(strpos($line,$loseStr) !== false){
return true;
}
return false;
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}
//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 "+"
if($y == 0){
$params['board'][$y][$x] = "+";
}elseif(($params['board'][$y -1 ][$x] !== "-") AND ($params['board'][$y -1 ][$x] !== "+")){
$params['board'][$y][$x] = "+";
}else{}
}
}
}
if((!isset($opponent)) && ($params['you'] == "X")){
$opponent="O";
}elseif(!isset($opponent)){
$opponent="X";
}
//transformer la grille en lignes horizontales, verticales et diagonales
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//verticales
for($x = 0; $x <7; $x ++){
$colStr="";
for($y = 0; $y <6; $y ++){
$colStr.= $params['board'][$y][$x];
}
$choice = analize($colStr,$params['you'],$opponent,true,$x);
}
//horizontales
for($y = 0; $y <6; $y ++){
$lnStr="";
for($x = 0; $x <7; $x ++){
$lnStr.= $params['board'][$y][$x];
}
$choice = analize($lnStr,$params['you'],$opponent,false,0);
}
//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];
}
$choice = analize($diagStr,$params['you'],$opponent,false,$k);
//diagonale \
$diagStr="";
for($x=$k , $y=5; isset($params['board'][$y][$x]); $x++, $y--){
$diagStr.=$params['board'][$y][$x];
}
$choice = analize($diagStr,$params['you'],$opponent,false,$k);
}
for ($k = 0; $k < 3; $k ++){
//diagonale /
$diagStr="";
for($x = 0, $y = $k ; isset($params['board'][$y][$x]); $x++, $y++){
$diagStr.=$params['board'][$y][$x];
}
$choice = analize($diagStr,$params['you'],$opponent,false,0);
}
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];
}
$choice = analize($diagStr,$params['you'],$opponent,false,0);
}
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//si j'arrive là, je ne gagne pas à ce tour
//liste des cases possible moins celles à éviter
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//Est-ce que cette combinaison est sauvegardée comme perdante?
$rs = mysqli_query($lnMySQL,"SELECT dont_play_col FROM battleshipLearn WHERE map='".hash_map($params['board'],$params['you'],$opponent)."'");
$learnedCells = array();
while($r = mysqli_fetch_row($rs)){
$learnedCells[] = $r[0];
}
trace
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$colAvailable=array();
for($i=0;$i<7;$i++){
if((($params['board'][5][$i] == "+") OR ($params['board'][5][$i] == "-"))
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AND (!should_opponent_win_if_i_play_at($params['board'],$params['you'],$opponent,$i))
AND (!in_array($i,$learnedCells)))
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{
$colAvailable[]=$i;
}
}
if(count($colAvailable) == 0){
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$trace.="|no colsAvailable";
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//on risque de perdre au prochain tour
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remenber_previous_lap_is_a_bullshit();
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for($i=0;$i<7;$i++){
if(($params['board'][5][$i] == "+") OR ($params['board'][5][$i] == "-")){
$colAvailable[]=$i;
}
}
}
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if(count(array_unique($choice['colForNoLose'])) > 1){
//opponent has to places to win
remenber_previous_lap_is_a_bullshit();
}
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$trace.="|learnedCells:".implode(",",$learnedCells)."|colAva:".implode(",",$colAvailable)."|colforNoLose:".implode(",",$choice['colForNoLose'])."|col for no loose depth1:".implode(",",$choice['colForNoLose1']);
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if(count($choice['colForNoLose']) > 0){
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//intersection entre $choice['colForNoLose'] et $colAvailable
$intersection = array_intersect($choice['colForNoLose'],$colAvailable);
if(count($intersection) > 0){
shuffle($intersection);
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play($params['board'],$intersection[0],$params['you'],$opponent,$params['game-id'],$params['player-index']);
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die;
}else{
//on pourra perdre au prochain tour, tant pis
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remenber_previous_lap_is_a_bullshit();
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shuffle($choice['colForNoLose']);
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play($params['board'],$choice['colForNoLose'][0],$params['you'],$opponent,$params['game-id'],$params['player-index']);
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die;
}
}
.
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.
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$colForNoLose1 = array_unique($choice['colForNoLose1']);
$canWinDepth1 = array_unique($choice['canWinDepth1']);
$intersection = array_intersect($colForNoLose1,$colAvailable,$canWinDepth1);
if(count($intersection) > 0){
shuffle($intersection);
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play($params['board'],$intersection[0],$params['you'],$opponent,$params['game-id'],$params['player-index']);
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die;
}
$intersection = array_intersect($colForNoLose1,$colAvailable);
if(count($intersection) > 0){
shuffle($intersection);
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play($params['board'],$intersection[0],$params['you'],$opponent,$params['game-id'],$params['player-index']);
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die;
}
$intersection = array_intersect($colForNoLose1,$canWinDepth1);
if(count($intersection) > 0){
shuffle($intersection);
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play($params['board'],$intersection[0],$params['you'],$opponent,$params['game-id'],$params['player-index']);
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die;
}
//still there? random
shuffle($colAvailable);
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play($params['board'],$colAvailable[0],$params['you'],$opponent,$params['game-id'],$params['player-index']);
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break;
default:
break;
.
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}
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