mambax7 /
chess
@@ -49,74 +49,74 @@ discard block |
||
| 49 | 49 | */ |
| 50 | 50 | function xoops_module_pre_update_chess($module, $oldversion) |
| 51 | 51 | { |
| 52 | - global $xoopsDB; |
|
| 53 | - |
|
| 54 | - // For downward-compatiblity, in case this function doesn't get called by the module handler. |
|
| 55 | - $GLOBALS['chess_module_pre_update_called'] = true; |
|
| 56 | - |
|
| 57 | - if ($oldversion < 102) { // old version < 1.02: direct update not supported. |
|
| 58 | - |
|
| 59 | - $docfile = XOOPS_ROOT_PATH . '/modules/chess/docs/INSTALL.TXT'; |
|
| 60 | - chess_set_message($module, sprintf(_MI_CHESS_OLD_VERSION, (string)$oldversion, $docfile), true); |
|
| 61 | - return false; |
|
| 62 | - } elseif ($oldversion >= 107) { // old version >= 1.07: no action needed. |
|
| 63 | - |
|
| 64 | - return true; |
|
| 65 | - } |
|
| 66 | - |
|
| 67 | - // 1.02 <= old version < 1.07: perform update. |
|
| 68 | - |
|
| 69 | - $ratings_table = $xoopsDB->prefix('chess_ratings'); |
|
| 70 | - $challenges_table = $xoopsDB->prefix('chess_challenges'); |
|
| 71 | - $games_table = $xoopsDB->prefix('chess_games'); |
|
| 72 | - |
|
| 73 | - // Check that ratings table does not already exist. |
|
| 74 | - chess_set_message($module, sprintf(_MI_CHESS_RATINGS_TABLE_1, $ratings_table)); |
|
| 75 | - $result = $xoopsDB->query("SHOW TABLES LIKE '$ratings_table'"); |
|
| 76 | - if (!$result) { |
|
| 77 | - $mysql_errno = $xoopsDB->errno(); |
|
| 78 | - $mysql_error = $xoopsDB->error(); |
|
| 79 | - chess_set_message($module, sprintf(_MI_CHESS_RATINGS_TABLE_2, $ratings_table, (string)$mysql_errno, $mysql_error), true); |
|
| 80 | - return false; |
|
| 81 | - } |
|
| 82 | - if ($xoopsDB->getRowsNum($result) > 0) { |
|
| 83 | - chess_set_message($module, sprintf(_MI_CHESS_RATINGS_TABLE_3, $ratings_table), true); |
|
| 84 | - return false; |
|
| 85 | - } |
|
| 86 | - $xoopsDB->freeRecordSet($result); |
|
| 87 | - chess_set_message($module, _MI_CHESS_OK); |
|
| 88 | - |
|
| 89 | - // Check database tables. |
|
| 90 | - chess_set_message($module, _MI_CHESS_CHK_DB_TABLES); |
|
| 91 | - $table_check_messages = chess_check_tables([$challenges_table, $games_table]); |
|
| 92 | - if (!empty($table_check_messages)) { |
|
| 93 | - foreach ($table_check_messages as $message) { |
|
| 94 | - chess_set_message($module, $message, true); |
|
| 95 | - } |
|
| 96 | - return false; |
|
| 97 | - } |
|
| 98 | - chess_set_message($module, _MI_CHESS_OK); |
|
| 99 | - |
|
| 100 | - // Check that values in column pgn_result of games table are in range. |
|
| 101 | - $pgn_result_values = "'*','1-0','0-1','1/2-1/2'"; |
|
| 102 | - chess_set_message($module, sprintf(_MI_CHESS_GAMES_TABLE_1, $games_table)); |
|
| 103 | - $result = $xoopsDB->query("SELECT COUNT(*) FROM `$games_table` WHERE `pgn_result` NOT IN ($pgn_result_values)"); |
|
| 104 | - if (!$result) { |
|
| 105 | - $mysql_errno = $xoopsDB->errno(); |
|
| 106 | - $mysql_error = $xoopsDB->error(); |
|
| 107 | - chess_set_message($module, sprintf(_MI_CHESS_GAMES_TABLE_2, $games_table, (string)$mysql_errno, $mysql_error), true); |
|
| 108 | - return false; |
|
| 109 | - } |
|
| 110 | - [$count] = $xoopsDB->fetchRow($result); |
|
| 111 | - if ($count > 0) { |
|
| 112 | - chess_set_message($module, sprintf(_MI_CHESS_GAMES_TABLE_3, 'pgn_result', $games_table, $pgn_result_values), true); |
|
| 113 | - chess_set_message($module, _MI_CHESS_GAMES_TABLE_4, true); |
|
| 114 | - return false; |
|
| 115 | - } |
|
| 116 | - $xoopsDB->freeRecordSet($result); |
|
| 117 | - chess_set_message($module, _MI_CHESS_OK); |
|
| 118 | - |
|
| 119 | - return true; // successful |
|
| 52 | + global $xoopsDB; |
|
| 53 | + |
|
| 54 | + // For downward-compatiblity, in case this function doesn't get called by the module handler. |
|
| 55 | + $GLOBALS['chess_module_pre_update_called'] = true; |
|
| 56 | + |
|
| 57 | + if ($oldversion < 102) { // old version < 1.02: direct update not supported. |
|
| 58 | + |
|
| 59 | + $docfile = XOOPS_ROOT_PATH . '/modules/chess/docs/INSTALL.TXT'; |
|
| 60 | + chess_set_message($module, sprintf(_MI_CHESS_OLD_VERSION, (string)$oldversion, $docfile), true); |
|
| 61 | + return false; |
|
| 62 | + } elseif ($oldversion >= 107) { // old version >= 1.07: no action needed. |
|
| 63 | + |
|
| 64 | + return true; |
|
| 65 | + } |
|
| 66 | + |
|
| 67 | + // 1.02 <= old version < 1.07: perform update. |
|
| 68 | + |
|
| 69 | + $ratings_table = $xoopsDB->prefix('chess_ratings'); |
|
| 70 | + $challenges_table = $xoopsDB->prefix('chess_challenges'); |
|
| 71 | + $games_table = $xoopsDB->prefix('chess_games'); |
|
| 72 | + |
|
| 73 | + // Check that ratings table does not already exist. |
|
| 74 | + chess_set_message($module, sprintf(_MI_CHESS_RATINGS_TABLE_1, $ratings_table)); |
|
| 75 | + $result = $xoopsDB->query("SHOW TABLES LIKE '$ratings_table'"); |
|
| 76 | + if (!$result) { |
|
| 77 | + $mysql_errno = $xoopsDB->errno(); |
|
| 78 | + $mysql_error = $xoopsDB->error(); |
|
| 79 | + chess_set_message($module, sprintf(_MI_CHESS_RATINGS_TABLE_2, $ratings_table, (string)$mysql_errno, $mysql_error), true); |
|
| 80 | + return false; |
|
| 81 | + } |
|
| 82 | + if ($xoopsDB->getRowsNum($result) > 0) { |
|
| 83 | + chess_set_message($module, sprintf(_MI_CHESS_RATINGS_TABLE_3, $ratings_table), true); |
|
| 84 | + return false; |
|
| 85 | + } |
|
| 86 | + $xoopsDB->freeRecordSet($result); |
|
| 87 | + chess_set_message($module, _MI_CHESS_OK); |
|
| 88 | + |
|
| 89 | + // Check database tables. |
|
| 90 | + chess_set_message($module, _MI_CHESS_CHK_DB_TABLES); |
|
| 91 | + $table_check_messages = chess_check_tables([$challenges_table, $games_table]); |
|
| 92 | + if (!empty($table_check_messages)) { |
|
| 93 | + foreach ($table_check_messages as $message) { |
|
| 94 | + chess_set_message($module, $message, true); |
|
| 95 | + } |
|
| 96 | + return false; |
|
| 97 | + } |
|
| 98 | + chess_set_message($module, _MI_CHESS_OK); |
|
| 99 | + |
|
| 100 | + // Check that values in column pgn_result of games table are in range. |
|
| 101 | + $pgn_result_values = "'*','1-0','0-1','1/2-1/2'"; |
|
| 102 | + chess_set_message($module, sprintf(_MI_CHESS_GAMES_TABLE_1, $games_table)); |
|
| 103 | + $result = $xoopsDB->query("SELECT COUNT(*) FROM `$games_table` WHERE `pgn_result` NOT IN ($pgn_result_values)"); |
|
| 104 | + if (!$result) { |
|
| 105 | + $mysql_errno = $xoopsDB->errno(); |
|
| 106 | + $mysql_error = $xoopsDB->error(); |
|
| 107 | + chess_set_message($module, sprintf(_MI_CHESS_GAMES_TABLE_2, $games_table, (string)$mysql_errno, $mysql_error), true); |
|
| 108 | + return false; |
|
| 109 | + } |
|
| 110 | + [$count] = $xoopsDB->fetchRow($result); |
|
| 111 | + if ($count > 0) { |
|
| 112 | + chess_set_message($module, sprintf(_MI_CHESS_GAMES_TABLE_3, 'pgn_result', $games_table, $pgn_result_values), true); |
|
| 113 | + chess_set_message($module, _MI_CHESS_GAMES_TABLE_4, true); |
|
| 114 | + return false; |
|
| 115 | + } |
|
| 116 | + $xoopsDB->freeRecordSet($result); |
|
| 117 | + chess_set_message($module, _MI_CHESS_OK); |
|
| 118 | + |
|
| 119 | + return true; // successful |
|
| 120 | 120 | } |
| 121 | 121 | |
| 122 | 122 | /** |
@@ -128,25 +128,25 @@ discard block |
||
| 128 | 128 | */ |
| 129 | 129 | function xoops_module_update_chess($module, $oldversion) |
| 130 | 130 | { |
| 131 | - global $xoopsDB; |
|
| 131 | + global $xoopsDB; |
|
| 132 | 132 | |
| 133 | - // Before proceeding, ensure that pre-update processing has been done, and that all the checks pass. |
|
| 134 | - // For downward-compatiblity, in case the "pre_update" function doesn't get called by the module handler. |
|
| 135 | - if (!@$GLOBALS['chess_module_pre_update_called'] && !xoops_module_pre_update_chess($module, $oldversion)) { |
|
| 136 | - return false; |
|
| 137 | - } |
|
| 133 | + // Before proceeding, ensure that pre-update processing has been done, and that all the checks pass. |
|
| 134 | + // For downward-compatiblity, in case the "pre_update" function doesn't get called by the module handler. |
|
| 135 | + if (!@$GLOBALS['chess_module_pre_update_called'] && !xoops_module_pre_update_chess($module, $oldversion)) { |
|
| 136 | + return false; |
|
| 137 | + } |
|
| 138 | 138 | |
| 139 | - if ($oldversion >= 107) { // old version >= 1.07: no action needed. |
|
| 140 | - return true; |
|
| 141 | - } |
|
| 139 | + if ($oldversion >= 107) { // old version >= 1.07: no action needed. |
|
| 140 | + return true; |
|
| 141 | + } |
|
| 142 | 142 | |
| 143 | - $ratings_table = $xoopsDB->prefix('chess_ratings'); |
|
| 144 | - $challenges_table = $xoopsDB->prefix('chess_challenges'); |
|
| 145 | - $games_table = $xoopsDB->prefix('chess_games'); |
|
| 143 | + $ratings_table = $xoopsDB->prefix('chess_ratings'); |
|
| 144 | + $challenges_table = $xoopsDB->prefix('chess_challenges'); |
|
| 145 | + $games_table = $xoopsDB->prefix('chess_games'); |
|
| 146 | 146 | |
| 147 | - $queries = [ |
|
| 147 | + $queries = [ |
|
| 148 | 148 | |
| 149 | - "CREATE TABLE `$ratings_table` ( |
|
| 149 | + "CREATE TABLE `$ratings_table` ( |
|
| 150 | 150 | `player_uid` mediumint(8) unsigned NOT NULL default '0', |
| 151 | 151 | `rating` smallint(6) unsigned NOT NULL default '1200', |
| 152 | 152 | `games_won` smallint(6) unsigned NOT NULL default '0', |
@@ -157,40 +157,40 @@ discard block |
||
| 157 | 157 | KEY `games` (`games_won`,`games_lost`,`games_drawn`) |
| 158 | 158 | ) TYPE=MyISAM", |
| 159 | 159 | |
| 160 | - "ALTER TABLE `$challenges_table` ADD `is_rated` ENUM('1','0') DEFAULT '1' NOT NULL", |
|
| 161 | - "ALTER TABLE `$challenges_table` ADD INDEX `game_type` (`game_type`)", |
|
| 162 | - "ALTER TABLE `$challenges_table` ADD INDEX `player1_uid` (`player1_uid`)", |
|
| 163 | - "ALTER TABLE `$challenges_table` ADD INDEX `player2_uid` (`player2_uid`)", |
|
| 164 | - "ALTER TABLE `$challenges_table` ADD INDEX `create_date` (`create_date`)", |
|
| 165 | - "ALTER TABLE `$challenges_table` ADD INDEX `is_rated` (`is_rated`)", |
|
| 166 | - |
|
| 167 | - "ALTER TABLE `$games_table` CHANGE `pgn_result` `pgn_result` ENUM('*','0-1','1-0','1/2-1/2') DEFAULT '*' NOT NULL", |
|
| 168 | - "ALTER TABLE `$games_table` ADD `is_rated` ENUM('1','0') DEFAULT '1' NOT NULL", |
|
| 169 | - "ALTER TABLE `$games_table` ADD INDEX `white_uid` (`white_uid`)", |
|
| 170 | - "ALTER TABLE `$games_table` ADD INDEX `black_uid` (`black_uid`)", |
|
| 171 | - "ALTER TABLE `$games_table` ADD INDEX `date` (`create_date`,`start_date`,`last_date`)", |
|
| 172 | - "ALTER TABLE `$games_table` ADD INDEX `pgn_result` (`pgn_result`)", |
|
| 173 | - "ALTER TABLE `$games_table` ADD INDEX `suspended_date` (`suspended`(19))", |
|
| 174 | - "ALTER TABLE `$games_table` ADD INDEX `is_rated` (`is_rated`)", |
|
| 175 | - |
|
| 176 | - "UPDATE `$games_table` SET `is_rated` = '0' WHERE `white_uid` = `black_uid`", |
|
| 177 | - ]; |
|
| 178 | - |
|
| 179 | - // Update database tables. |
|
| 180 | - chess_set_message($module, _MI_CHESS_UPDATING_DATABASE); |
|
| 181 | - foreach ($queries as $query) { |
|
| 182 | - chess_set_message($module, "> $query"); |
|
| 183 | - $result = $xoopsDB->query($query); |
|
| 184 | - if (!$result) { |
|
| 185 | - $mysql_errno = $xoopsDB->errno(); |
|
| 186 | - $mysql_error = $xoopsDB->error(); |
|
| 187 | - chess_set_message($module, " ... ($mysql_errno) $mysql_error"); |
|
| 188 | - return false; |
|
| 189 | - } |
|
| 190 | - chess_set_message($module, _MI_CHESS_OK); |
|
| 191 | - } |
|
| 192 | - |
|
| 193 | - /*** |
|
| 160 | + "ALTER TABLE `$challenges_table` ADD `is_rated` ENUM('1','0') DEFAULT '1' NOT NULL", |
|
| 161 | + "ALTER TABLE `$challenges_table` ADD INDEX `game_type` (`game_type`)", |
|
| 162 | + "ALTER TABLE `$challenges_table` ADD INDEX `player1_uid` (`player1_uid`)", |
|
| 163 | + "ALTER TABLE `$challenges_table` ADD INDEX `player2_uid` (`player2_uid`)", |
|
| 164 | + "ALTER TABLE `$challenges_table` ADD INDEX `create_date` (`create_date`)", |
|
| 165 | + "ALTER TABLE `$challenges_table` ADD INDEX `is_rated` (`is_rated`)", |
|
| 166 | + |
|
| 167 | + "ALTER TABLE `$games_table` CHANGE `pgn_result` `pgn_result` ENUM('*','0-1','1-0','1/2-1/2') DEFAULT '*' NOT NULL", |
|
| 168 | + "ALTER TABLE `$games_table` ADD `is_rated` ENUM('1','0') DEFAULT '1' NOT NULL", |
|
| 169 | + "ALTER TABLE `$games_table` ADD INDEX `white_uid` (`white_uid`)", |
|
| 170 | + "ALTER TABLE `$games_table` ADD INDEX `black_uid` (`black_uid`)", |
|
| 171 | + "ALTER TABLE `$games_table` ADD INDEX `date` (`create_date`,`start_date`,`last_date`)", |
|
| 172 | + "ALTER TABLE `$games_table` ADD INDEX `pgn_result` (`pgn_result`)", |
|
| 173 | + "ALTER TABLE `$games_table` ADD INDEX `suspended_date` (`suspended`(19))", |
|
| 174 | + "ALTER TABLE `$games_table` ADD INDEX `is_rated` (`is_rated`)", |
|
| 175 | + |
|
| 176 | + "UPDATE `$games_table` SET `is_rated` = '0' WHERE `white_uid` = `black_uid`", |
|
| 177 | + ]; |
|
| 178 | + |
|
| 179 | + // Update database tables. |
|
| 180 | + chess_set_message($module, _MI_CHESS_UPDATING_DATABASE); |
|
| 181 | + foreach ($queries as $query) { |
|
| 182 | + chess_set_message($module, "> $query"); |
|
| 183 | + $result = $xoopsDB->query($query); |
|
| 184 | + if (!$result) { |
|
| 185 | + $mysql_errno = $xoopsDB->errno(); |
|
| 186 | + $mysql_error = $xoopsDB->error(); |
|
| 187 | + chess_set_message($module, " ... ($mysql_errno) $mysql_error"); |
|
| 188 | + return false; |
|
| 189 | + } |
|
| 190 | + chess_set_message($module, _MI_CHESS_OK); |
|
| 191 | + } |
|
| 192 | + |
|
| 193 | + /*** |
|
| 194 | 194 | * #*#TODO# - Leave this here for now, in case I think of a way to get it to work. |
| 195 | 195 | * # This causes an error about the rating_system module configuration parameter not being defined, |
| 196 | 196 | * # so I added a note in INSTALL.TXT about manually recalculating the ratings after install. |
@@ -201,9 +201,9 @@ discard block |
||
| 201 | 201 | * chess_recalc_ratings(); |
| 202 | 202 | ***/ |
| 203 | 203 | |
| 204 | - chess_set_message($module, _MI_CHESS_UPDATE_SUCCESSFUL); |
|
| 204 | + chess_set_message($module, _MI_CHESS_UPDATE_SUCCESSFUL); |
|
| 205 | 205 | |
| 206 | - return true; // successful |
|
| 206 | + return true; // successful |
|
| 207 | 207 | } |
| 208 | 208 | |
| 209 | 209 | /** |
@@ -214,37 +214,37 @@ discard block |
||
| 214 | 214 | */ |
| 215 | 215 | function chess_check_tables($table_names) |
| 216 | 216 | { |
| 217 | - global $xoopsDB; |
|
| 217 | + global $xoopsDB; |
|
| 218 | 218 | |
| 219 | - $messages = []; |
|
| 219 | + $messages = []; |
|
| 220 | 220 | |
| 221 | - foreach ($table_names as $table_name) { |
|
| 222 | - $query = "CHECK TABLE `$table_name`"; |
|
| 223 | - $result = $xoopsDB->query($query); |
|
| 224 | - if (!$result) { |
|
| 225 | - $mysql_errno = $xoopsDB->errno(); |
|
| 226 | - $mysql_error = $xoopsDB->error(); |
|
| 227 | - $messages[] = $query; |
|
| 228 | - $messages[] = " ... ($mysql_errno) $mysql_error"; |
|
| 229 | - continue; |
|
| 230 | - } |
|
| 221 | + foreach ($table_names as $table_name) { |
|
| 222 | + $query = "CHECK TABLE `$table_name`"; |
|
| 223 | + $result = $xoopsDB->query($query); |
|
| 224 | + if (!$result) { |
|
| 225 | + $mysql_errno = $xoopsDB->errno(); |
|
| 226 | + $mysql_error = $xoopsDB->error(); |
|
| 227 | + $messages[] = $query; |
|
| 228 | + $messages[] = " ... ($mysql_errno) $mysql_error"; |
|
| 229 | + continue; |
|
| 230 | + } |
|
| 231 | 231 | |
| 232 | - // Initialize, in case the real table status fails to get retrieved. |
|
| 233 | - $table_status = '*** STATUS UNKNOWN ***'; |
|
| 232 | + // Initialize, in case the real table status fails to get retrieved. |
|
| 233 | + $table_status = '*** STATUS UNKNOWN ***'; |
|
| 234 | 234 | |
| 235 | - // The query may return multiple rows. Only the last row is normally of interest, so only that row is saved. |
|
| 236 | - while ($row = $xoopsDB->fetchArray($result)) { |
|
| 237 | - $table_status = $row['Msg_text']; |
|
| 238 | - } |
|
| 235 | + // The query may return multiple rows. Only the last row is normally of interest, so only that row is saved. |
|
| 236 | + while ($row = $xoopsDB->fetchArray($result)) { |
|
| 237 | + $table_status = $row['Msg_text']; |
|
| 238 | + } |
|
| 239 | 239 | |
| 240 | - $xoopsDB->freeRecordSet($result); |
|
| 240 | + $xoopsDB->freeRecordSet($result); |
|
| 241 | 241 | |
| 242 | - if ('OK' != $table_status) { |
|
| 243 | - $messages[] = " ... $table_name: $table_status"; |
|
| 244 | - } |
|
| 245 | - } |
|
| 242 | + if ('OK' != $table_status) { |
|
| 243 | + $messages[] = " ... $table_name: $table_status"; |
|
| 244 | + } |
|
| 245 | + } |
|
| 246 | 246 | |
| 247 | - return $messages; |
|
| 247 | + return $messages; |
|
| 248 | 248 | } |
| 249 | 249 | |
| 250 | 250 | /** |
@@ -259,12 +259,12 @@ discard block |
||
| 259 | 259 | */ |
| 260 | 260 | function chess_load_lang_file($filename, $module = '', $default = 'english') |
| 261 | 261 | { |
| 262 | - $lang = $GLOBALS['xoopsConfig']['language']; |
|
| 263 | - $path = XOOPS_ROOT_PATH . (empty($module) ? '/' : "/modules/$module/") . 'language'; |
|
| 264 | - if (!($ret = @include_once("$path/$lang/$filename.php"))) { |
|
| 265 | - $ret = include_once("$path/$default/$filename.php"); |
|
| 266 | - } |
|
| 267 | - return $ret; |
|
| 262 | + $lang = $GLOBALS['xoopsConfig']['language']; |
|
| 263 | + $path = XOOPS_ROOT_PATH . (empty($module) ? '/' : "/modules/$module/") . 'language'; |
|
| 264 | + if (!($ret = @include_once("$path/$lang/$filename.php"))) { |
|
| 265 | + $ret = include_once("$path/$default/$filename.php"); |
|
| 266 | + } |
|
| 267 | + return $ret; |
|
| 268 | 268 | } |
| 269 | 269 | |
| 270 | 270 | /** |
@@ -276,14 +276,14 @@ discard block |
||
| 276 | 276 | */ |
| 277 | 277 | function chess_set_message($module, $text = '', $error = false) |
| 278 | 278 | { |
| 279 | - $text = $error ? "<span style='color:#ff0000;background-color:#ffffff;font-weight:bold;'>$text</span>" : $text; |
|
| 280 | - |
|
| 281 | - // For downward compatibility with XOOPS versions that don't have the method XoopsModule::setMessage. |
|
| 282 | - if (is_object($module) && method_exists($module, 'setMessage')) { |
|
| 283 | - $module->setMessage($text); |
|
| 284 | - } else { |
|
| 285 | - echo "<code>$text</code><br />\n"; |
|
| 286 | - } |
|
| 279 | + $text = $error ? "<span style='color:#ff0000;background-color:#ffffff;font-weight:bold;'>$text</span>" : $text; |
|
| 280 | + |
|
| 281 | + // For downward compatibility with XOOPS versions that don't have the method XoopsModule::setMessage. |
|
| 282 | + if (is_object($module) && method_exists($module, 'setMessage')) { |
|
| 283 | + $module->setMessage($text); |
|
| 284 | + } else { |
|
| 285 | + echo "<code>$text</code><br />\n"; |
|
| 286 | + } |
|
| 287 | 287 | } |
| 288 | 288 | |
| 289 | 289 | ?> |
@@ -54,986 +54,986 @@ discard block |
||
| 54 | 54 | */ |
| 55 | 55 | class ChessGame |
| 56 | 56 | { |
| 57 | - /** |
|
| 58 | - * Indicates whether object is valid. |
|
| 59 | - * |
|
| 60 | - * If empty string (''), indicates this is a valid object; otherwise contains an error message. |
|
| 61 | - * Should be checked after creating an instance of this class. |
|
| 62 | - * |
|
| 63 | - * @var string $error |
|
| 64 | - */ |
|
| 65 | - |
|
| 66 | - public $error; |
|
| 67 | - /** |
|
| 68 | - * gamestate |
|
| 69 | - * |
|
| 70 | - * The game state is represented as an array with the following elements: |
|
| 71 | - * |
|
| 72 | - * - 'fen_piece_placement' |
|
| 73 | - * - 'fen_active_color' |
|
| 74 | - * - 'fen_castling_availability' |
|
| 75 | - * - 'fen_en_passant_target_square' |
|
| 76 | - * - 'fen_halfmove_clock' |
|
| 77 | - * - 'fen_fullmove_number' |
|
| 78 | - * - 'pgn_result' |
|
| 79 | - * - 'pgn_fen' |
|
| 80 | - * - 'pgn_movetext' |
|
| 81 | - * |
|
| 82 | - * The elements prefixed with 'fen_' are standard Forsyth-Edwards Notation (FEN) elements, |
|
| 83 | - * and the elements prefixed with 'pgn_' are standard Portable Game Notation (PGN) elements. |
|
| 84 | - * |
|
| 85 | - * Each element is a string. |
|
| 86 | - * |
|
| 87 | - * @var array $gamestate |
|
| 88 | - */ |
|
| 89 | - |
|
| 90 | - public $gamestate; |
|
| 91 | - /** |
|
| 92 | - * board |
|
| 93 | - * |
|
| 94 | - * A 64-element array, constructed from fen_piece_placement, is used for handling moves. |
|
| 95 | - * Its indices are related to the standard tile coordinates as follows: |
|
| 96 | - * |
|
| 97 | - * <pre> |
|
| 98 | - * 8 | 56 57 58 59 60 61 62 63 |
|
| 99 | - * 7 | 48 49 50 51 52 53 54 55 |
|
| 100 | - * 6 | 40 41 42 43 44 45 46 47 |
|
| 101 | - * 5 | 32 33 34 35 36 37 38 39 |
|
| 102 | - * 4 | 24 25 26 27 28 29 30 31 |
|
| 103 | - * 3 | 16 17 18 19 20 21 22 23 |
|
| 104 | - * 2 | 8 9 10 11 12 13 14 15 |
|
| 105 | - * 1 | 0 1 2 3 4 5 6 7 |
|
| 106 | - * ------------------------ |
|
| 107 | - * a b c d e f g h |
|
| 108 | - * </pre> |
|
| 109 | - * |
|
| 110 | - * For example, $board[17] is tile b3 and $board[55] is tile h7. |
|
| 111 | - * |
|
| 112 | - * @var array $board |
|
| 113 | - */ |
|
| 114 | - |
|
| 115 | - public $board; |
|
| 116 | - /** |
|
| 117 | - * for auto-completion of moves |
|
| 118 | - * @var string $ac_move |
|
| 119 | - */ |
|
| 120 | - |
|
| 121 | - public $ac_move; |
|
| 122 | - /** |
|
| 123 | - * array of white's pieces |
|
| 124 | - * @var array $w_figures |
|
| 125 | - */ |
|
| 126 | - |
|
| 127 | - public $w_figures; |
|
| 128 | - /** |
|
| 129 | - * array of black's pieces |
|
| 130 | - * @var array $b_figures |
|
| 131 | - */ |
|
| 132 | - |
|
| 133 | - public $b_figures; |
|
| 134 | - /** |
|
| 135 | - * updated by handleMove, not used now but might be used in future |
|
| 136 | - * @var string $last_move |
|
| 137 | - */ |
|
| 138 | - |
|
| 139 | - public $last_move; |
|
| 140 | - /** |
|
| 141 | - * updated by handleMove, not used now but might be used in future |
|
| 142 | - * @var string $captured_piece |
|
| 143 | - */ |
|
| 144 | - |
|
| 145 | - public $captured_piece; |
|
| 146 | - // -------------- |
|
| 147 | - |
|
| 148 | - // PUBLIC METHODS |
|
| 149 | - |
|
| 150 | - // -------------- |
|
| 151 | - |
|
| 152 | - /** |
|
| 153 | - * constructor |
|
| 154 | - * |
|
| 155 | - * If a failure occurs, $this->error is set to a string containing an error message; |
|
| 156 | - * otherwise $this->error is set to an empty string. |
|
| 157 | - * |
|
| 158 | - * Example: |
|
| 159 | - * <pre> |
|
| 160 | - * $chessgame = new ChessGame($fen); |
|
| 161 | - * if (!empty($chessgame->error)) { |
|
| 162 | - * echo "'$fen' invalid: $chessgame->error\n"; |
|
| 163 | - * } |
|
| 164 | - * </pre> |
|
| 165 | - * |
|
| 166 | - * @param mixed $param If $param is an array, an existing game is loaded using $param as the nine-element gamestate array described above. |
|
| 167 | - * If $param is a non-empty string, a new game is created using $param as a FEN setup position. |
|
| 168 | - * Otherwise, a new game is created using the standard starting position. |
|
| 169 | - */ |
|
| 170 | - public function __construct($param = null) |
|
| 171 | - { |
|
| 172 | - // for now |
|
| 173 | - |
|
| 174 | - $this->browsing_mode = 0; |
|
| 175 | - |
|
| 176 | - if (\is_array($param)) { |
|
| 177 | - $this->gamestate = $param; |
|
| 178 | - |
|
| 179 | - $this->error = ''; |
|
| 180 | - } elseif (\is_string($param) && !empty($param)) { |
|
| 181 | - $this->error = $this->init_gamestate($param); |
|
| 182 | - } else { |
|
| 183 | - $this->init_gamestate(); |
|
| 184 | - |
|
| 185 | - $this->error = ''; |
|
| 186 | - } |
|
| 187 | - } |
|
| 188 | - |
|
| 189 | - /** |
|
| 190 | - * Handle a move. |
|
| 191 | - * |
|
| 192 | - * @param string $move |
|
| 193 | - * @return array A two-element array: |
|
| 194 | - * - $move_performed: true if the move was performed and the game state has been updated, false otherwise |
|
| 195 | - * - $move_result_text: text message |
|
| 196 | - */ |
|
| 197 | - public function move($move) |
|
| 198 | - { |
|
| 199 | - empty($this->error) or \trigger_error(_MD_CHESS_ERROR, \E_USER_ERROR); |
|
| 200 | - |
|
| 201 | - return $this->handleMove($move); |
|
| 202 | - } |
|
| 203 | - |
|
| 204 | - /** |
|
| 205 | - * get game state |
|
| 206 | - * |
|
| 207 | - * @return array |
|
| 208 | - */ |
|
| 209 | - public function gamestate() |
|
| 210 | - { |
|
| 211 | - empty($this->error) or \trigger_error(_MD_CHESS_ERROR, \E_USER_ERROR); |
|
| 212 | - |
|
| 213 | - return $this->gamestate; |
|
| 214 | - } |
|
| 215 | - |
|
| 216 | - // ---------------------------------------------------------------- |
|
| 217 | - |
|
| 218 | - // PRIVATE METHODS - intended for use only by methods of this class |
|
| 219 | - |
|
| 220 | - // ---------------------------------------------------------------- |
|
| 221 | - |
|
| 222 | - /** |
|
| 223 | - * Initialize gamestate for a new game. |
|
| 224 | - * |
|
| 225 | - * If a non-empty string $fen is provided, the game is initialized using $fen as a FEN setup position. |
|
| 226 | - * Otherwise the game is initialized using the standard starting position. |
|
| 227 | - * |
|
| 228 | - * @param string $fen |
|
| 229 | - * @return string empty string on success, or error message on failure |
|
| 230 | - * |
|
| 231 | - * @access private |
|
| 232 | - */ |
|
| 233 | - public function init_gamestate($fen = null) |
|
| 234 | - { |
|
| 235 | - $this->gamestate = []; |
|
| 236 | - |
|
| 237 | - if (!empty($fen)) { |
|
| 238 | - $setup = true; |
|
| 239 | - } else { |
|
| 240 | - $setup = false; |
|
| 241 | - |
|
| 242 | - $fen = 'rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1'; |
|
| 243 | - } |
|
| 244 | - |
|
| 245 | - // check that data is not unreasonably short or long |
|
| 246 | - |
|
| 247 | - if (\mb_strlen($fen) < 23 || \mb_strlen($fen) > 100) { |
|
| 248 | - return _MD_CHESS_FENBAD_LENGTH; // invalid length |
|
| 249 | - } |
|
| 250 | - |
|
| 251 | - $fen_data = \explode(' ', $fen); |
|
| 252 | - |
|
| 253 | - if (6 != \count($fen_data)) { |
|
| 254 | - return _MD_CHESS_FENBAD_FIELD_COUNT; // wrong number of fields |
|
| 255 | - } |
|
| 256 | - |
|
| 257 | - $this->gamestate['fen_piece_placement'] = $fen_data[0]; |
|
| 258 | - |
|
| 259 | - $this->gamestate['fen_active_color'] = $fen_data[1]; |
|
| 260 | - |
|
| 261 | - $this->gamestate['fen_castling_availability'] = $fen_data[2]; |
|
| 262 | - |
|
| 263 | - $this->gamestate['fen_en_passant_target_square'] = $fen_data[3]; |
|
| 264 | - |
|
| 265 | - $this->gamestate['fen_halfmove_clock'] = $fen_data[4]; |
|
| 266 | - |
|
| 267 | - $this->gamestate['fen_fullmove_number'] = $fen_data[5]; |
|
| 268 | - |
|
| 269 | - $this->gamestate['pgn_fen'] = $setup ? $fen : null; |
|
| 270 | - |
|
| 271 | - $this->gamestate['pgn_result'] = '*'; |
|
| 272 | - |
|
| 273 | - $this->gamestate['pgn_movetext'] = '*'; |
|
| 274 | - |
|
| 275 | - if (!$this->fen_piece_placement_to_board()) { |
|
| 276 | - return _MD_CHESS_FENBAD_PP_INVALID; // piece_placement invalid |
|
| 277 | - } elseif ('w' != $this->gamestate['fen_active_color'] && 'b' != $this->gamestate['fen_active_color']) { |
|
| 278 | - return _MD_CHESS_FENBAD_AC_INVALID; // active_color invalid |
|
| 279 | - } // Since fen_piece_placement_to_board() checked $fen for the correct number of fields above, $castling_availability is non-empty. |
|
| 280 | - |
|
| 281 | - elseif ('-' != $this->gamestate['fen_castling_availability'] && !\preg_match('/^K?Q?k?q?$/', $this->gamestate['fen_castling_availability'])) { |
|
| 282 | - return _MD_CHESS_FENBAD_CA_INVALID; // castling_availability invalid |
|
| 283 | - } elseif ('-' != $this->gamestate['fen_en_passant_target_square'] && !\preg_match('/^[a-h][36]$/', $this->gamestate['fen_en_passant_target_square'])) { |
|
| 284 | - return _MD_CHESS_FENBAD_EP_INVALID; // en_passant_target_square invalid |
|
| 285 | - } elseif (!\preg_match('/^\d{0,4}$/', $this->gamestate['fen_halfmove_clock'])) { |
|
| 286 | - return _MD_CHESS_FENBAD_HC_INVALID; // halfmove_clock invalid |
|
| 287 | - } elseif (!\preg_match('/^\d{0,4}$/', $this->gamestate['fen_fullmove_number']) || $this->gamestate['fen_fullmove_number'] < 1) { |
|
| 288 | - return _MD_CHESS_FENBAD_FN_INVALID; // fullmove_number invalid |
|
| 289 | - } elseif ($this->insufficient_mating_material()) { |
|
| 290 | - return _MD_CHESS_FENBAD_MATERIAL; // insufficient mating material |
|
| 291 | - } elseif (('w' == $this->gamestate['fen_active_color'] && $this->kingIsUnderAttack('b', 'w')) |
|
| 292 | - || ('b' == $this->gamestate['fen_active_color'] && $this->kingIsUnderAttack('w', 'b'))) { |
|
| 293 | - return _MD_CHESS_FENBAD_IN_CHECK; // player to move cannot have opponent in check |
|
| 294 | - } elseif ((\mb_strstr($this->gamestate['fen_castling_availability'], 'K') && ('wK' != $this->board[4] || 'wR' != $this->board[7])) |
|
| 295 | - || (\mb_strstr($this->gamestate['fen_castling_availability'], 'Q') && ('wK' != $this->board[4] || 'wR' != $this->board[0])) |
|
| 296 | - || (\mb_strstr($this->gamestate['fen_castling_availability'], 'k') && ('bK' != $this->board[60] || 'bR' != $this->board[63])) |
|
| 297 | - || (\mb_strstr($this->gamestate['fen_castling_availability'], 'q') && ('bK' != $this->board[60] || 'bR' != $this->board[56]))) { |
|
| 298 | - return _MD_CHESS_FENBAD_CA_INCONSISTENT; // castling availability inconsistent with piece placement |
|
| 299 | - } elseif (('-' != $this->gamestate['fen_en_passant_target_square'] && 3 == $this->gamestate['fen_en_passant_target_square'][1] && 'b' != $this->gamestate['fen_active_color']) |
|
| 300 | - || ('-' != $this->gamestate['fen_en_passant_target_square'] && 6 == $this->gamestate['fen_en_passant_target_square'][1] && 'w' != $this->gamestate['fen_active_color'])) { |
|
| 301 | - return _MD_CHESS_FENBAD_EP_COLOR; // en passant target square wrong color |
|
| 302 | - } elseif ('-' != $this->gamestate['fen_en_passant_target_square'] && 3 == $this->gamestate['fen_en_passant_target_square'][1] |
|
| 303 | - && 'wP' != $this->board[$this->boardCoordToIndex($this->gamestate['fen_en_passant_target_square'][0] . '4')]) { |
|
| 304 | - return _MD_CHESS_FENBAD_EP_NO_PAWN; // en passant target square for nonexistent pawn |
|
| 305 | - } elseif ('-' != $this->gamestate['fen_en_passant_target_square'] && 6 == $this->gamestate['fen_en_passant_target_square'][1] |
|
| 306 | - && 'bP' != $this->board[$this->boardCoordToIndex($this->gamestate['fen_en_passant_target_square'][0] . '5')]) { |
|
| 307 | - return _MD_CHESS_FENBAD_EP_NO_PAWN; // en passant target square for nonexistent pawn |
|
| 308 | - } |
|
| 309 | - |
|
| 310 | - #echo "In " . __CLASS__ . '::' . __FUNCTION__ . "\n";#*#DEBUG# |
|
| 311 | - |
|
| 312 | - #var_dump('gamestate', $this->gamestate);#*#DEBUG# |
|
| 313 | - |
|
| 314 | - return ''; // successful |
|
| 315 | - } |
|
| 316 | - |
|
| 317 | - /** |
|
| 318 | - * Check whether a path is blocked. |
|
| 319 | - * |
|
| 320 | - * check a series of tiles given a start, an end tile |
|
| 321 | - * which is not included to the check and a position |
|
| 322 | - * change for each iteration. return true if not blocked. |
|
| 323 | - * all values are given for 1dim board. |
|
| 324 | - * |
|
| 325 | - * @param int $start |
|
| 326 | - * @param int $end |
|
| 327 | - * @param int $change |
|
| 328 | - * @return bool |
|
| 329 | - * |
|
| 330 | - * @access private |
|
| 331 | - */ |
|
| 332 | - public function pathIsNotBlocked($start, $end, $change) |
|
| 333 | - { |
|
| 334 | - for ($pos = $start; $pos != $end; $pos += $change) { |
|
| 335 | - #echo "path: $pos: '$this->board[$pos]' "; #*#DEBUG# |
|
| 336 | - |
|
| 337 | - if (!$this->is_empty_tile($pos)) { |
|
| 338 | - return 0; |
|
| 339 | - } |
|
| 340 | - } |
|
| 341 | - |
|
| 342 | - return 1; |
|
| 343 | - } |
|
| 344 | - |
|
| 345 | - /** |
|
| 346 | - * Get path. |
|
| 347 | - * |
|
| 348 | - * get the empty tiles between start and end as an 1dim array. |
|
| 349 | - * whether the path is clear is not checked. |
|
| 350 | - * |
|
| 351 | - * @param int $start |
|
| 352 | - * @param int $end |
|
| 353 | - * @param int $change |
|
| 354 | - * @return array |
|
| 355 | - * |
|
| 356 | - * @access private |
|
| 357 | - */ |
|
| 358 | - public function getPath($start, $end, $change) |
|
| 359 | - { |
|
| 360 | - $path = []; |
|
| 361 | - |
|
| 362 | - for ($pos = $start; $pos != $end; $pos += $change) { |
|
| 363 | - $path[] = $pos; |
|
| 364 | - } |
|
| 365 | - |
|
| 366 | - return $path; |
|
| 367 | - } |
|
| 368 | - |
|
| 369 | - /** |
|
| 370 | - * get path change |
|
| 371 | - * |
|
| 372 | - * get the change value that must be added to create |
|
| 373 | - * the 1dim path for figure moving from fig_pos to |
|
| 374 | - * dest_pos. it is assumed that the movement is valid! |
|
| 375 | - * no additional checks as in tileIsReachable are |
|
| 376 | - * performed. rook, queen and bishop are the only |
|
| 377 | - * units that can have empty tiles in between. |
|
| 378 | - * |
|
| 379 | - * @param string $fig |
|
| 380 | - * @param int $fig_pos |
|
| 381 | - * @param int $dest_pos |
|
| 382 | - * @return int |
|
| 383 | - * |
|
| 384 | - * @access private |
|
| 385 | - */ |
|
| 386 | - public function getPathChange($fig, $fig_pos, $dest_pos) |
|
| 387 | - { |
|
| 388 | - $change = 0; |
|
| 389 | - |
|
| 390 | - $fy = \floor($fig_pos / 8); |
|
| 391 | - |
|
| 392 | - $fx = $fig_pos % 8; |
|
| 393 | - |
|
| 394 | - $dx = $dest_pos % 8; |
|
| 395 | - |
|
| 396 | - $dy = \floor($dest_pos / 8); |
|
| 397 | - |
|
| 398 | - switch ($fig) { |
|
| 399 | - /* bishop */ case 'B': |
|
| 400 | - $change = $dy < $fy ? -8 : 8; |
|
| 401 | - $change += $dx < $fx ? -1 : 1; |
|
| 402 | - break; |
|
| 403 | - /* rook */ case 'R': |
|
| 404 | - if ($fx == $dx) { |
|
| 405 | - $change = $dy < $fy ? -8 : 8; |
|
| 406 | - } else { |
|
| 407 | - $change = $dx < $fx ? -1 : 1; |
|
| 408 | - } |
|
| 409 | - break; |
|
| 410 | - /* queen */ case 'Q': |
|
| 411 | - if (\abs($fx - $dx) == \abs($fy - $dy)) { |
|
| 412 | - $change = $dy < $fy ? -8 : 8; |
|
| 413 | - |
|
| 414 | - $change += $dx < $fx ? -1 : 1; |
|
| 415 | - } elseif ($fx == $dx) { |
|
| 416 | - $change = $dy < $fy ? -8 : 8; |
|
| 417 | - } else { |
|
| 418 | - $change = $dx < $fx ? -1 : 1; |
|
| 419 | - } |
|
| 420 | - break; |
|
| 421 | - } |
|
| 422 | - |
|
| 423 | - return $change; |
|
| 424 | - } |
|
| 425 | - |
|
| 426 | - /** |
|
| 427 | - * Check whether a tile is reachable. |
|
| 428 | - * |
|
| 429 | - * check whether dest_pos is in reach for unit of fig_type |
|
| 430 | - * at tile fig_pos. it is not checked whether the tile |
|
| 431 | - * itself is occupied but only the tiles in between. |
|
| 432 | - * this function does not check pawns. |
|
| 433 | - * |
|
| 434 | - * @param string $fig |
|
| 435 | - * @param int $fig_pos |
|
| 436 | - * @param int $dest_pos |
|
| 437 | - * @return bool |
|
| 438 | - * |
|
| 439 | - * @access private |
|
| 440 | - */ |
|
| 441 | - public function tileIsReachable($fig, $fig_pos, $dest_pos) |
|
| 442 | - { |
|
| 443 | - if ($fig_pos == $dest_pos) { |
|
| 444 | - return; |
|
| 445 | - } |
|
| 446 | - |
|
| 447 | - $result = 0; |
|
| 448 | - |
|
| 449 | - $fy = \floor($fig_pos / 8); |
|
| 450 | - |
|
| 451 | - $fx = $fig_pos % 8; |
|
| 452 | - |
|
| 453 | - $dy = \floor($dest_pos / 8); |
|
| 454 | - |
|
| 455 | - $dx = $dest_pos % 8; |
|
| 456 | - |
|
| 457 | - /* DEBUG: echo "$fx,$fy --> $dx,$dy: "; */ |
|
| 458 | - |
|
| 459 | - switch ($fig) { |
|
| 460 | - /* knight */ case 'N': |
|
| 461 | - if (1 == \abs($fx - $dx) && 2 == \abs($fy - $dy)) { |
|
| 462 | - $result = 1; |
|
| 463 | - } |
|
| 464 | - if (1 == \abs($fy - $dy) && 2 == \abs($fx - $dx)) { |
|
| 465 | - $result = 1; |
|
| 466 | - } |
|
| 467 | - break; |
|
| 468 | - /* bishop */ case 'B': |
|
| 469 | - if (\abs($fx - $dx) != \abs($fy - $dy)) { |
|
| 470 | - break; |
|
| 471 | - } |
|
| 472 | - if ($dy < $fy) { |
|
| 473 | - $change = -8; |
|
| 474 | - } else { |
|
| 475 | - $change = 8; |
|
| 476 | - } |
|
| 477 | - if ($dx < $fx) { |
|
| 478 | - --$change; |
|
| 479 | - } else { |
|
| 480 | - ++$change; |
|
| 481 | - } |
|
| 482 | - if ($this->pathIsNotBlocked($fig_pos + $change, $dest_pos, $change)) { |
|
| 483 | - $result = 1; |
|
| 484 | - } |
|
| 485 | - break; |
|
| 486 | - /* rook */ case 'R': |
|
| 487 | - if ($fx != $dx && $fy != $dy) { |
|
| 488 | - break; |
|
| 489 | - } |
|
| 490 | - if ($fx == $dx) { |
|
| 491 | - if ($dy < $fy) { |
|
| 492 | - $change = -8; |
|
| 493 | - } else { |
|
| 494 | - $change = 8; |
|
| 495 | - } |
|
| 496 | - } else { |
|
| 497 | - if ($dx < $fx) { |
|
| 498 | - $change = -1; |
|
| 499 | - } else { |
|
| 500 | - $change = 1; |
|
| 501 | - } |
|
| 502 | - } |
|
| 503 | - if ($this->pathIsNotBlocked($fig_pos + $change, $dest_pos, $change)) { |
|
| 504 | - $result = 1; |
|
| 505 | - } |
|
| 506 | - break; |
|
| 507 | - /* queen */ case 'Q': |
|
| 508 | - if (\abs($fx - $dx) != \abs($fy - $dy) && $fx != $dx && $fy != $dy) { |
|
| 509 | - break; |
|
| 510 | - } |
|
| 511 | - if (\abs($fx - $dx) == \abs($fy - $dy)) { |
|
| 512 | - if ($dy < $fy) { |
|
| 513 | - $change = -8; |
|
| 514 | - } else { |
|
| 515 | - $change = 8; |
|
| 516 | - } |
|
| 517 | - |
|
| 518 | - if ($dx < $fx) { |
|
| 519 | - --$change; |
|
| 520 | - } else { |
|
| 521 | - ++$change; |
|
| 522 | - } |
|
| 523 | - } elseif ($fx == $dx) { |
|
| 524 | - if ($dy < $fy) { |
|
| 525 | - $change = -8; |
|
| 526 | - } else { |
|
| 527 | - $change = 8; |
|
| 528 | - } |
|
| 529 | - } else { |
|
| 530 | - if ($dx < $fx) { |
|
| 531 | - $change = -1; |
|
| 532 | - } else { |
|
| 533 | - $change = 1; |
|
| 534 | - } |
|
| 535 | - } |
|
| 536 | - if ($this->pathIsNotBlocked($fig_pos + $change, $dest_pos, $change)) { |
|
| 537 | - $result = 1; |
|
| 538 | - } |
|
| 539 | - break; |
|
| 540 | - /* king */ case 'K': |
|
| 541 | - if (\abs($fx - $dx) > 1 || \abs($fy - $dy) > 1) { |
|
| 542 | - break; |
|
| 543 | - } |
|
| 544 | - $kings = 0; |
|
| 545 | - $adj_tiles = $this->getAdjTiles($dest_pos); |
|
| 546 | - foreach ($adj_tiles as $tile) { |
|
| 547 | - if ('K' == $this->board[$tile][1]) { |
|
| 548 | - $kings++; |
|
| 549 | - } |
|
| 550 | - } |
|
| 551 | - if (2 == $kings) { |
|
| 552 | - break; |
|
| 553 | - } |
|
| 554 | - $result = 1; |
|
| 555 | - break; |
|
| 556 | - } |
|
| 557 | - |
|
| 558 | - /* DEBUG: echo " $result<br>"; */ |
|
| 559 | - |
|
| 560 | - return $result; |
|
| 561 | - } |
|
| 562 | - |
|
| 563 | - /** |
|
| 564 | - * Check whether a pawn can attack a tile. |
|
| 565 | - * |
|
| 566 | - * @param int $fig_pos Position of pawn |
|
| 567 | - * @param int $dest_pos Tile to check |
|
| 568 | - * @return bool True if pawn can attack |
|
| 569 | - * |
|
| 570 | - * @access private |
|
| 571 | - */ |
|
| 572 | - public function checkPawnAttack($fig_pos, $dest_pos) |
|
| 573 | - { |
|
| 574 | - if ('w' == $this->board[$fig_pos][0]) { |
|
| 575 | - if ($fig_pos % 8 > 0 && $dest_pos == $fig_pos + 7) { |
|
| 576 | - return 1; |
|
| 577 | - } |
|
| 578 | - |
|
| 579 | - if ($fig_pos % 8 < 7 && $dest_pos == $fig_pos + 9) { |
|
| 580 | - return 1; |
|
| 581 | - } |
|
| 582 | - } elseif ('b' == $this->board[$fig_pos][0]) { |
|
| 583 | - if ($fig_pos % 8 < 7 && $dest_pos == $fig_pos - 7) { |
|
| 584 | - return 1; |
|
| 585 | - } |
|
| 586 | - |
|
| 587 | - if ($fig_pos % 8 > 0 && $dest_pos == $fig_pos - 9) { |
|
| 588 | - return 1; |
|
| 589 | - } |
|
| 590 | - } |
|
| 591 | - |
|
| 592 | - return 0; |
|
| 593 | - } |
|
| 594 | - |
|
| 595 | - /** |
|
| 596 | - * Check whether a pawn move is legal. |
|
| 597 | - * |
|
| 598 | - * check whether pawn at figpos may move to destpos. |
|
| 599 | - * first move may be two tiles instead of just one. |
|
| 600 | - * again the last tile is not checked but just the path |
|
| 601 | - * in between. |
|
| 602 | - * |
|
| 603 | - * @param int $fig_pos Position of pawn. |
|
| 604 | - * @param int $dest_pos Destination tile. |
|
| 605 | - * @return bool True if move is legal |
|
| 606 | - * |
|
| 607 | - * @access private |
|
| 608 | - */ |
|
| 609 | - public function checkPawnMove($fig_pos, $dest_pos) |
|
| 610 | - { |
|
| 611 | - $first_move = 0; |
|
| 612 | - |
|
| 613 | - if ('w' == $this->board[$fig_pos][0]) { |
|
| 614 | - if ($fig_pos >= 8 && $fig_pos <= 15) { |
|
| 615 | - $first_move = 1; |
|
| 616 | - } |
|
| 617 | - |
|
| 618 | - if ($dest_pos == $fig_pos + 8) { |
|
| 619 | - return 1; |
|
| 620 | - } |
|
| 621 | - |
|
| 622 | - if ($first_move && ($dest_pos == $fig_pos + 16)) { |
|
| 623 | - if ($this->is_empty_tile($fig_pos + 8)) { |
|
| 624 | - return 1; |
|
| 625 | - } |
|
| 626 | - } |
|
| 627 | - } elseif ('b' == $this->board[$fig_pos][0]) { |
|
| 628 | - if ($fig_pos >= 48 && $fig_pos <= 55) { |
|
| 629 | - $first_move = 1; |
|
| 630 | - } |
|
| 631 | - |
|
| 632 | - if ($dest_pos == $fig_pos - 8) { |
|
| 633 | - return 1; |
|
| 634 | - } |
|
| 635 | - |
|
| 636 | - if ($first_move && ($dest_pos == $fig_pos - 16)) { |
|
| 637 | - if ($this->is_empty_tile($fig_pos - 8)) { |
|
| 638 | - return 1; |
|
| 639 | - } |
|
| 640 | - } |
|
| 641 | - } |
|
| 642 | - |
|
| 643 | - return 0; |
|
| 644 | - } |
|
| 645 | - |
|
| 646 | - /** |
|
| 647 | - * Check whether a tile is under attack by the specified player. |
|
| 648 | - * |
|
| 649 | - * @param string $opp Attacking color ('w' or 'b') |
|
| 650 | - * @param int $dest_pos Tile to check |
|
| 651 | - * @return bool |
|
| 652 | - * |
|
| 653 | - * @access private |
|
| 654 | - */ |
|
| 655 | - public function tileIsUnderAttack($opp, $dest_pos) |
|
| 656 | - { |
|
| 657 | - #var_dump('tileIsUnderAttack, opp', $opp, 'dest_pos', $dest_pos, 'board', $board);#*#DEBUG# |
|
| 658 | - |
|
| 659 | - for ($i = 0; $i < 64; $i++) { |
|
| 660 | - if ($this->board[$i][0] == $opp) { |
|
| 661 | - if (('P' == $this->board[$i][1] && $this->checkPawnAttack($i, $dest_pos)) |
|
| 662 | - || ('P' != $this->board[$i][1] |
|
| 663 | - && $this->tileIsReachable($this->board[$i][1], $i, $dest_pos))) { |
|
| 664 | - /*DEBUG: echo "attack test: $i: ",$opp,"P<br>"; */ |
|
| 665 | - |
|
| 666 | - return 1; |
|
| 667 | - } |
|
| 668 | - } |
|
| 669 | - } |
|
| 670 | - |
|
| 671 | - return 0; |
|
| 672 | - } |
|
| 673 | - |
|
| 674 | - /** |
|
| 675 | - * Check whether a player's king can be attacked by his opponent. |
|
| 676 | - * |
|
| 677 | - * @param string $player Player's color ('w' or 'b') |
|
| 678 | - * @param string $opp Opponent's color ('w' or 'b') |
|
| 679 | - * @return bool |
|
| 680 | - * |
|
| 681 | - * @access private |
|
| 682 | - */ |
|
| 683 | - public function kingIsUnderAttack($player, $opp) |
|
| 684 | - { |
|
| 685 | - #var_dump('kingIsUnderAttack, player', $player, 'opp', $opp, 'board', $board);#*#DEBUG# |
|
| 686 | - |
|
| 687 | - for ($i = 0; $i < 64; $i++) { |
|
| 688 | - if ($this->board[$i][0] == $player && 'K' == $this->board[$i][1]) { |
|
| 689 | - $king_pos = $i; |
|
| 690 | - |
|
| 691 | - break; |
|
| 692 | - } |
|
| 693 | - } |
|
| 694 | - |
|
| 695 | - /*DEBUG: echo "$player king is at $king_pos<br>"; */ |
|
| 696 | - |
|
| 697 | - return $this->tileIsUnderAttack($opp, $king_pos); |
|
| 698 | - } |
|
| 699 | - |
|
| 700 | - /** |
|
| 701 | - * Check whether player's king is checkmated by his opponent. |
|
| 702 | - * |
|
| 703 | - * @param string $player Player's color ('w' or 'b') |
|
| 704 | - * @param string $opp Opponent's color ('w' or 'b') |
|
| 705 | - * @return bool |
|
| 706 | - * |
|
| 707 | - * @access private |
|
| 708 | - */ |
|
| 709 | - public function isCheckMate($player, $opp) |
|
| 710 | - { |
|
| 711 | - for ($i = 0; $i < 64; $i++) { |
|
| 712 | - if ($this->board[$i][0] == $player && 'K' == $this->board[$i][1]) { |
|
| 713 | - $king_pos = $i; |
|
| 714 | - |
|
| 715 | - $king_x = $i % 8; |
|
| 716 | - |
|
| 717 | - $king_y = \floor($i / 8); |
|
| 718 | - |
|
| 719 | - break; |
|
| 720 | - } |
|
| 721 | - } |
|
| 722 | - |
|
| 723 | - /* test adjacent tiles while king is temporarly removed */ |
|
| 724 | - |
|
| 725 | - $adj_tiles = $this->getAdjTiles($king_pos); |
|
| 726 | - |
|
| 727 | - $contents = $this->board[$king_pos]; |
|
| 728 | - |
|
| 729 | - $this->clear_tile($king_pos); |
|
| 730 | - |
|
| 731 | - foreach ($adj_tiles as $dest_pos) { |
|
| 732 | - if ($this->board[$dest_pos][0] == $player) { |
|
| 733 | - continue; |
|
| 734 | - } |
|
| 735 | - |
|
| 736 | - if ($this->tileIsUnderAttack($opp, $dest_pos)) { |
|
| 737 | - continue; |
|
| 738 | - } |
|
| 739 | - |
|
| 740 | - $this->board[$king_pos] = $contents; |
|
| 741 | - |
|
| 742 | - return 0; |
|
| 743 | - } |
|
| 744 | - |
|
| 745 | - $this->board[$king_pos] = $contents; |
|
| 746 | - |
|
| 747 | - /* DEBUG: echo "King cannot escape by itself! "; */ |
|
| 748 | - |
|
| 749 | - /* get all figures that attack the king */ |
|
| 750 | - |
|
| 751 | - $attackers = []; |
|
| 752 | - |
|
| 753 | - $count = 0; |
|
| 754 | - |
|
| 755 | - for ($i = 0; $i < 64; $i++) { |
|
| 756 | - if ($this->board[$i][0] == $opp) { |
|
| 757 | - if (('P' == $this->board[$i][1] && $this->checkPawnAttack($i, $king_pos)) |
|
| 758 | - || ('P' != $this->board[$i][1] |
|
| 759 | - && $this->tileIsReachable($this->board[$i][1], $i, $king_pos))) { |
|
| 760 | - $attackers[$count++] = $i; |
|
| 761 | - } |
|
| 762 | - } |
|
| 763 | - } |
|
| 57 | + /** |
|
| 58 | + * Indicates whether object is valid. |
|
| 59 | + * |
|
| 60 | + * If empty string (''), indicates this is a valid object; otherwise contains an error message. |
|
| 61 | + * Should be checked after creating an instance of this class. |
|
| 62 | + * |
|
| 63 | + * @var string $error |
|
| 64 | + */ |
|
| 65 | + |
|
| 66 | + public $error; |
|
| 67 | + /** |
|
| 68 | + * gamestate |
|
| 69 | + * |
|
| 70 | + * The game state is represented as an array with the following elements: |
|
| 71 | + * |
|
| 72 | + * - 'fen_piece_placement' |
|
| 73 | + * - 'fen_active_color' |
|
| 74 | + * - 'fen_castling_availability' |
|
| 75 | + * - 'fen_en_passant_target_square' |
|
| 76 | + * - 'fen_halfmove_clock' |
|
| 77 | + * - 'fen_fullmove_number' |
|
| 78 | + * - 'pgn_result' |
|
| 79 | + * - 'pgn_fen' |
|
| 80 | + * - 'pgn_movetext' |
|
| 81 | + * |
|
| 82 | + * The elements prefixed with 'fen_' are standard Forsyth-Edwards Notation (FEN) elements, |
|
| 83 | + * and the elements prefixed with 'pgn_' are standard Portable Game Notation (PGN) elements. |
|
| 84 | + * |
|
| 85 | + * Each element is a string. |
|
| 86 | + * |
|
| 87 | + * @var array $gamestate |
|
| 88 | + */ |
|
| 89 | + |
|
| 90 | + public $gamestate; |
|
| 91 | + /** |
|
| 92 | + * board |
|
| 93 | + * |
|
| 94 | + * A 64-element array, constructed from fen_piece_placement, is used for handling moves. |
|
| 95 | + * Its indices are related to the standard tile coordinates as follows: |
|
| 96 | + * |
|
| 97 | + * <pre> |
|
| 98 | + * 8 | 56 57 58 59 60 61 62 63 |
|
| 99 | + * 7 | 48 49 50 51 52 53 54 55 |
|
| 100 | + * 6 | 40 41 42 43 44 45 46 47 |
|
| 101 | + * 5 | 32 33 34 35 36 37 38 39 |
|
| 102 | + * 4 | 24 25 26 27 28 29 30 31 |
|
| 103 | + * 3 | 16 17 18 19 20 21 22 23 |
|
| 104 | + * 2 | 8 9 10 11 12 13 14 15 |
|
| 105 | + * 1 | 0 1 2 3 4 5 6 7 |
|
| 106 | + * ------------------------ |
|
| 107 | + * a b c d e f g h |
|
| 108 | + * </pre> |
|
| 109 | + * |
|
| 110 | + * For example, $board[17] is tile b3 and $board[55] is tile h7. |
|
| 111 | + * |
|
| 112 | + * @var array $board |
|
| 113 | + */ |
|
| 114 | + |
|
| 115 | + public $board; |
|
| 116 | + /** |
|
| 117 | + * for auto-completion of moves |
|
| 118 | + * @var string $ac_move |
|
| 119 | + */ |
|
| 120 | + |
|
| 121 | + public $ac_move; |
|
| 122 | + /** |
|
| 123 | + * array of white's pieces |
|
| 124 | + * @var array $w_figures |
|
| 125 | + */ |
|
| 126 | + |
|
| 127 | + public $w_figures; |
|
| 128 | + /** |
|
| 129 | + * array of black's pieces |
|
| 130 | + * @var array $b_figures |
|
| 131 | + */ |
|
| 132 | + |
|
| 133 | + public $b_figures; |
|
| 134 | + /** |
|
| 135 | + * updated by handleMove, not used now but might be used in future |
|
| 136 | + * @var string $last_move |
|
| 137 | + */ |
|
| 138 | + |
|
| 139 | + public $last_move; |
|
| 140 | + /** |
|
| 141 | + * updated by handleMove, not used now but might be used in future |
|
| 142 | + * @var string $captured_piece |
|
| 143 | + */ |
|
| 144 | + |
|
| 145 | + public $captured_piece; |
|
| 146 | + // -------------- |
|
| 147 | + |
|
| 148 | + // PUBLIC METHODS |
|
| 149 | + |
|
| 150 | + // -------------- |
|
| 151 | + |
|
| 152 | + /** |
|
| 153 | + * constructor |
|
| 154 | + * |
|
| 155 | + * If a failure occurs, $this->error is set to a string containing an error message; |
|
| 156 | + * otherwise $this->error is set to an empty string. |
|
| 157 | + * |
|
| 158 | + * Example: |
|
| 159 | + * <pre> |
|
| 160 | + * $chessgame = new ChessGame($fen); |
|
| 161 | + * if (!empty($chessgame->error)) { |
|
| 162 | + * echo "'$fen' invalid: $chessgame->error\n"; |
|
| 163 | + * } |
|
| 164 | + * </pre> |
|
| 165 | + * |
|
| 166 | + * @param mixed $param If $param is an array, an existing game is loaded using $param as the nine-element gamestate array described above. |
|
| 167 | + * If $param is a non-empty string, a new game is created using $param as a FEN setup position. |
|
| 168 | + * Otherwise, a new game is created using the standard starting position. |
|
| 169 | + */ |
|
| 170 | + public function __construct($param = null) |
|
| 171 | + { |
|
| 172 | + // for now |
|
| 173 | + |
|
| 174 | + $this->browsing_mode = 0; |
|
| 175 | + |
|
| 176 | + if (\is_array($param)) { |
|
| 177 | + $this->gamestate = $param; |
|
| 178 | + |
|
| 179 | + $this->error = ''; |
|
| 180 | + } elseif (\is_string($param) && !empty($param)) { |
|
| 181 | + $this->error = $this->init_gamestate($param); |
|
| 182 | + } else { |
|
| 183 | + $this->init_gamestate(); |
|
| 184 | + |
|
| 185 | + $this->error = ''; |
|
| 186 | + } |
|
| 187 | + } |
|
| 188 | + |
|
| 189 | + /** |
|
| 190 | + * Handle a move. |
|
| 191 | + * |
|
| 192 | + * @param string $move |
|
| 193 | + * @return array A two-element array: |
|
| 194 | + * - $move_performed: true if the move was performed and the game state has been updated, false otherwise |
|
| 195 | + * - $move_result_text: text message |
|
| 196 | + */ |
|
| 197 | + public function move($move) |
|
| 198 | + { |
|
| 199 | + empty($this->error) or \trigger_error(_MD_CHESS_ERROR, \E_USER_ERROR); |
|
| 200 | + |
|
| 201 | + return $this->handleMove($move); |
|
| 202 | + } |
|
| 203 | + |
|
| 204 | + /** |
|
| 205 | + * get game state |
|
| 206 | + * |
|
| 207 | + * @return array |
|
| 208 | + */ |
|
| 209 | + public function gamestate() |
|
| 210 | + { |
|
| 211 | + empty($this->error) or \trigger_error(_MD_CHESS_ERROR, \E_USER_ERROR); |
|
| 212 | + |
|
| 213 | + return $this->gamestate; |
|
| 214 | + } |
|
| 215 | + |
|
| 216 | + // ---------------------------------------------------------------- |
|
| 217 | + |
|
| 218 | + // PRIVATE METHODS - intended for use only by methods of this class |
|
| 219 | + |
|
| 220 | + // ---------------------------------------------------------------- |
|
| 221 | + |
|
| 222 | + /** |
|
| 223 | + * Initialize gamestate for a new game. |
|
| 224 | + * |
|
| 225 | + * If a non-empty string $fen is provided, the game is initialized using $fen as a FEN setup position. |
|
| 226 | + * Otherwise the game is initialized using the standard starting position. |
|
| 227 | + * |
|
| 228 | + * @param string $fen |
|
| 229 | + * @return string empty string on success, or error message on failure |
|
| 230 | + * |
|
| 231 | + * @access private |
|
| 232 | + */ |
|
| 233 | + public function init_gamestate($fen = null) |
|
| 234 | + { |
|
| 235 | + $this->gamestate = []; |
|
| 236 | + |
|
| 237 | + if (!empty($fen)) { |
|
| 238 | + $setup = true; |
|
| 239 | + } else { |
|
| 240 | + $setup = false; |
|
| 241 | + |
|
| 242 | + $fen = 'rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1'; |
|
| 243 | + } |
|
| 244 | + |
|
| 245 | + // check that data is not unreasonably short or long |
|
| 246 | + |
|
| 247 | + if (\mb_strlen($fen) < 23 || \mb_strlen($fen) > 100) { |
|
| 248 | + return _MD_CHESS_FENBAD_LENGTH; // invalid length |
|
| 249 | + } |
|
| 250 | + |
|
| 251 | + $fen_data = \explode(' ', $fen); |
|
| 252 | + |
|
| 253 | + if (6 != \count($fen_data)) { |
|
| 254 | + return _MD_CHESS_FENBAD_FIELD_COUNT; // wrong number of fields |
|
| 255 | + } |
|
| 256 | + |
|
| 257 | + $this->gamestate['fen_piece_placement'] = $fen_data[0]; |
|
| 258 | + |
|
| 259 | + $this->gamestate['fen_active_color'] = $fen_data[1]; |
|
| 260 | + |
|
| 261 | + $this->gamestate['fen_castling_availability'] = $fen_data[2]; |
|
| 262 | + |
|
| 263 | + $this->gamestate['fen_en_passant_target_square'] = $fen_data[3]; |
|
| 264 | + |
|
| 265 | + $this->gamestate['fen_halfmove_clock'] = $fen_data[4]; |
|
| 266 | + |
|
| 267 | + $this->gamestate['fen_fullmove_number'] = $fen_data[5]; |
|
| 268 | + |
|
| 269 | + $this->gamestate['pgn_fen'] = $setup ? $fen : null; |
|
| 270 | + |
|
| 271 | + $this->gamestate['pgn_result'] = '*'; |
|
| 272 | + |
|
| 273 | + $this->gamestate['pgn_movetext'] = '*'; |
|
| 274 | + |
|
| 275 | + if (!$this->fen_piece_placement_to_board()) { |
|
| 276 | + return _MD_CHESS_FENBAD_PP_INVALID; // piece_placement invalid |
|
| 277 | + } elseif ('w' != $this->gamestate['fen_active_color'] && 'b' != $this->gamestate['fen_active_color']) { |
|
| 278 | + return _MD_CHESS_FENBAD_AC_INVALID; // active_color invalid |
|
| 279 | + } // Since fen_piece_placement_to_board() checked $fen for the correct number of fields above, $castling_availability is non-empty. |
|
| 280 | + |
|
| 281 | + elseif ('-' != $this->gamestate['fen_castling_availability'] && !\preg_match('/^K?Q?k?q?$/', $this->gamestate['fen_castling_availability'])) { |
|
| 282 | + return _MD_CHESS_FENBAD_CA_INVALID; // castling_availability invalid |
|
| 283 | + } elseif ('-' != $this->gamestate['fen_en_passant_target_square'] && !\preg_match('/^[a-h][36]$/', $this->gamestate['fen_en_passant_target_square'])) { |
|
| 284 | + return _MD_CHESS_FENBAD_EP_INVALID; // en_passant_target_square invalid |
|
| 285 | + } elseif (!\preg_match('/^\d{0,4}$/', $this->gamestate['fen_halfmove_clock'])) { |
|
| 286 | + return _MD_CHESS_FENBAD_HC_INVALID; // halfmove_clock invalid |
|
| 287 | + } elseif (!\preg_match('/^\d{0,4}$/', $this->gamestate['fen_fullmove_number']) || $this->gamestate['fen_fullmove_number'] < 1) { |
|
| 288 | + return _MD_CHESS_FENBAD_FN_INVALID; // fullmove_number invalid |
|
| 289 | + } elseif ($this->insufficient_mating_material()) { |
|
| 290 | + return _MD_CHESS_FENBAD_MATERIAL; // insufficient mating material |
|
| 291 | + } elseif (('w' == $this->gamestate['fen_active_color'] && $this->kingIsUnderAttack('b', 'w')) |
|
| 292 | + || ('b' == $this->gamestate['fen_active_color'] && $this->kingIsUnderAttack('w', 'b'))) { |
|
| 293 | + return _MD_CHESS_FENBAD_IN_CHECK; // player to move cannot have opponent in check |
|
| 294 | + } elseif ((\mb_strstr($this->gamestate['fen_castling_availability'], 'K') && ('wK' != $this->board[4] || 'wR' != $this->board[7])) |
|
| 295 | + || (\mb_strstr($this->gamestate['fen_castling_availability'], 'Q') && ('wK' != $this->board[4] || 'wR' != $this->board[0])) |
|
| 296 | + || (\mb_strstr($this->gamestate['fen_castling_availability'], 'k') && ('bK' != $this->board[60] || 'bR' != $this->board[63])) |
|
| 297 | + || (\mb_strstr($this->gamestate['fen_castling_availability'], 'q') && ('bK' != $this->board[60] || 'bR' != $this->board[56]))) { |
|
| 298 | + return _MD_CHESS_FENBAD_CA_INCONSISTENT; // castling availability inconsistent with piece placement |
|
| 299 | + } elseif (('-' != $this->gamestate['fen_en_passant_target_square'] && 3 == $this->gamestate['fen_en_passant_target_square'][1] && 'b' != $this->gamestate['fen_active_color']) |
|
| 300 | + || ('-' != $this->gamestate['fen_en_passant_target_square'] && 6 == $this->gamestate['fen_en_passant_target_square'][1] && 'w' != $this->gamestate['fen_active_color'])) { |
|
| 301 | + return _MD_CHESS_FENBAD_EP_COLOR; // en passant target square wrong color |
|
| 302 | + } elseif ('-' != $this->gamestate['fen_en_passant_target_square'] && 3 == $this->gamestate['fen_en_passant_target_square'][1] |
|
| 303 | + && 'wP' != $this->board[$this->boardCoordToIndex($this->gamestate['fen_en_passant_target_square'][0] . '4')]) { |
|
| 304 | + return _MD_CHESS_FENBAD_EP_NO_PAWN; // en passant target square for nonexistent pawn |
|
| 305 | + } elseif ('-' != $this->gamestate['fen_en_passant_target_square'] && 6 == $this->gamestate['fen_en_passant_target_square'][1] |
|
| 306 | + && 'bP' != $this->board[$this->boardCoordToIndex($this->gamestate['fen_en_passant_target_square'][0] . '5')]) { |
|
| 307 | + return _MD_CHESS_FENBAD_EP_NO_PAWN; // en passant target square for nonexistent pawn |
|
| 308 | + } |
|
| 309 | + |
|
| 310 | + #echo "In " . __CLASS__ . '::' . __FUNCTION__ . "\n";#*#DEBUG# |
|
| 311 | + |
|
| 312 | + #var_dump('gamestate', $this->gamestate);#*#DEBUG# |
|
| 313 | + |
|
| 314 | + return ''; // successful |
|
| 315 | + } |
|
| 316 | + |
|
| 317 | + /** |
|
| 318 | + * Check whether a path is blocked. |
|
| 319 | + * |
|
| 320 | + * check a series of tiles given a start, an end tile |
|
| 321 | + * which is not included to the check and a position |
|
| 322 | + * change for each iteration. return true if not blocked. |
|
| 323 | + * all values are given for 1dim board. |
|
| 324 | + * |
|
| 325 | + * @param int $start |
|
| 326 | + * @param int $end |
|
| 327 | + * @param int $change |
|
| 328 | + * @return bool |
|
| 329 | + * |
|
| 330 | + * @access private |
|
| 331 | + */ |
|
| 332 | + public function pathIsNotBlocked($start, $end, $change) |
|
| 333 | + { |
|
| 334 | + for ($pos = $start; $pos != $end; $pos += $change) { |
|
| 335 | + #echo "path: $pos: '$this->board[$pos]' "; #*#DEBUG# |
|
| 336 | + |
|
| 337 | + if (!$this->is_empty_tile($pos)) { |
|
| 338 | + return 0; |
|
| 339 | + } |
|
| 340 | + } |
|
| 341 | + |
|
| 342 | + return 1; |
|
| 343 | + } |
|
| 344 | + |
|
| 345 | + /** |
|
| 346 | + * Get path. |
|
| 347 | + * |
|
| 348 | + * get the empty tiles between start and end as an 1dim array. |
|
| 349 | + * whether the path is clear is not checked. |
|
| 350 | + * |
|
| 351 | + * @param int $start |
|
| 352 | + * @param int $end |
|
| 353 | + * @param int $change |
|
| 354 | + * @return array |
|
| 355 | + * |
|
| 356 | + * @access private |
|
| 357 | + */ |
|
| 358 | + public function getPath($start, $end, $change) |
|
| 359 | + { |
|
| 360 | + $path = []; |
|
| 361 | + |
|
| 362 | + for ($pos = $start; $pos != $end; $pos += $change) { |
|
| 363 | + $path[] = $pos; |
|
| 364 | + } |
|
| 365 | + |
|
| 366 | + return $path; |
|
| 367 | + } |
|
| 368 | + |
|
| 369 | + /** |
|
| 370 | + * get path change |
|
| 371 | + * |
|
| 372 | + * get the change value that must be added to create |
|
| 373 | + * the 1dim path for figure moving from fig_pos to |
|
| 374 | + * dest_pos. it is assumed that the movement is valid! |
|
| 375 | + * no additional checks as in tileIsReachable are |
|
| 376 | + * performed. rook, queen and bishop are the only |
|
| 377 | + * units that can have empty tiles in between. |
|
| 378 | + * |
|
| 379 | + * @param string $fig |
|
| 380 | + * @param int $fig_pos |
|
| 381 | + * @param int $dest_pos |
|
| 382 | + * @return int |
|
| 383 | + * |
|
| 384 | + * @access private |
|
| 385 | + */ |
|
| 386 | + public function getPathChange($fig, $fig_pos, $dest_pos) |
|
| 387 | + { |
|
| 388 | + $change = 0; |
|
| 389 | + |
|
| 390 | + $fy = \floor($fig_pos / 8); |
|
| 391 | + |
|
| 392 | + $fx = $fig_pos % 8; |
|
| 393 | + |
|
| 394 | + $dx = $dest_pos % 8; |
|
| 395 | + |
|
| 396 | + $dy = \floor($dest_pos / 8); |
|
| 397 | + |
|
| 398 | + switch ($fig) { |
|
| 399 | + /* bishop */ case 'B': |
|
| 400 | + $change = $dy < $fy ? -8 : 8; |
|
| 401 | + $change += $dx < $fx ? -1 : 1; |
|
| 402 | + break; |
|
| 403 | + /* rook */ case 'R': |
|
| 404 | + if ($fx == $dx) { |
|
| 405 | + $change = $dy < $fy ? -8 : 8; |
|
| 406 | + } else { |
|
| 407 | + $change = $dx < $fx ? -1 : 1; |
|
| 408 | + } |
|
| 409 | + break; |
|
| 410 | + /* queen */ case 'Q': |
|
| 411 | + if (\abs($fx - $dx) == \abs($fy - $dy)) { |
|
| 412 | + $change = $dy < $fy ? -8 : 8; |
|
| 413 | + |
|
| 414 | + $change += $dx < $fx ? -1 : 1; |
|
| 415 | + } elseif ($fx == $dx) { |
|
| 416 | + $change = $dy < $fy ? -8 : 8; |
|
| 417 | + } else { |
|
| 418 | + $change = $dx < $fx ? -1 : 1; |
|
| 419 | + } |
|
| 420 | + break; |
|
| 421 | + } |
|
| 422 | + |
|
| 423 | + return $change; |
|
| 424 | + } |
|
| 425 | + |
|
| 426 | + /** |
|
| 427 | + * Check whether a tile is reachable. |
|
| 428 | + * |
|
| 429 | + * check whether dest_pos is in reach for unit of fig_type |
|
| 430 | + * at tile fig_pos. it is not checked whether the tile |
|
| 431 | + * itself is occupied but only the tiles in between. |
|
| 432 | + * this function does not check pawns. |
|
| 433 | + * |
|
| 434 | + * @param string $fig |
|
| 435 | + * @param int $fig_pos |
|
| 436 | + * @param int $dest_pos |
|
| 437 | + * @return bool |
|
| 438 | + * |
|
| 439 | + * @access private |
|
| 440 | + */ |
|
| 441 | + public function tileIsReachable($fig, $fig_pos, $dest_pos) |
|
| 442 | + { |
|
| 443 | + if ($fig_pos == $dest_pos) { |
|
| 444 | + return; |
|
| 445 | + } |
|
| 446 | + |
|
| 447 | + $result = 0; |
|
| 448 | + |
|
| 449 | + $fy = \floor($fig_pos / 8); |
|
| 450 | + |
|
| 451 | + $fx = $fig_pos % 8; |
|
| 452 | + |
|
| 453 | + $dy = \floor($dest_pos / 8); |
|
| 454 | + |
|
| 455 | + $dx = $dest_pos % 8; |
|
| 456 | + |
|
| 457 | + /* DEBUG: echo "$fx,$fy --> $dx,$dy: "; */ |
|
| 458 | + |
|
| 459 | + switch ($fig) { |
|
| 460 | + /* knight */ case 'N': |
|
| 461 | + if (1 == \abs($fx - $dx) && 2 == \abs($fy - $dy)) { |
|
| 462 | + $result = 1; |
|
| 463 | + } |
|
| 464 | + if (1 == \abs($fy - $dy) && 2 == \abs($fx - $dx)) { |
|
| 465 | + $result = 1; |
|
| 466 | + } |
|
| 467 | + break; |
|
| 468 | + /* bishop */ case 'B': |
|
| 469 | + if (\abs($fx - $dx) != \abs($fy - $dy)) { |
|
| 470 | + break; |
|
| 471 | + } |
|
| 472 | + if ($dy < $fy) { |
|
| 473 | + $change = -8; |
|
| 474 | + } else { |
|
| 475 | + $change = 8; |
|
| 476 | + } |
|
| 477 | + if ($dx < $fx) { |
|
| 478 | + --$change; |
|
| 479 | + } else { |
|
| 480 | + ++$change; |
|
| 481 | + } |
|
| 482 | + if ($this->pathIsNotBlocked($fig_pos + $change, $dest_pos, $change)) { |
|
| 483 | + $result = 1; |
|
| 484 | + } |
|
| 485 | + break; |
|
| 486 | + /* rook */ case 'R': |
|
| 487 | + if ($fx != $dx && $fy != $dy) { |
|
| 488 | + break; |
|
| 489 | + } |
|
| 490 | + if ($fx == $dx) { |
|
| 491 | + if ($dy < $fy) { |
|
| 492 | + $change = -8; |
|
| 493 | + } else { |
|
| 494 | + $change = 8; |
|
| 495 | + } |
|
| 496 | + } else { |
|
| 497 | + if ($dx < $fx) { |
|
| 498 | + $change = -1; |
|
| 499 | + } else { |
|
| 500 | + $change = 1; |
|
| 501 | + } |
|
| 502 | + } |
|
| 503 | + if ($this->pathIsNotBlocked($fig_pos + $change, $dest_pos, $change)) { |
|
| 504 | + $result = 1; |
|
| 505 | + } |
|
| 506 | + break; |
|
| 507 | + /* queen */ case 'Q': |
|
| 508 | + if (\abs($fx - $dx) != \abs($fy - $dy) && $fx != $dx && $fy != $dy) { |
|
| 509 | + break; |
|
| 510 | + } |
|
| 511 | + if (\abs($fx - $dx) == \abs($fy - $dy)) { |
|
| 512 | + if ($dy < $fy) { |
|
| 513 | + $change = -8; |
|
| 514 | + } else { |
|
| 515 | + $change = 8; |
|
| 516 | + } |
|
| 517 | + |
|
| 518 | + if ($dx < $fx) { |
|
| 519 | + --$change; |
|
| 520 | + } else { |
|
| 521 | + ++$change; |
|
| 522 | + } |
|
| 523 | + } elseif ($fx == $dx) { |
|
| 524 | + if ($dy < $fy) { |
|
| 525 | + $change = -8; |
|
| 526 | + } else { |
|
| 527 | + $change = 8; |
|
| 528 | + } |
|
| 529 | + } else { |
|
| 530 | + if ($dx < $fx) { |
|
| 531 | + $change = -1; |
|
| 532 | + } else { |
|
| 533 | + $change = 1; |
|
| 534 | + } |
|
| 535 | + } |
|
| 536 | + if ($this->pathIsNotBlocked($fig_pos + $change, $dest_pos, $change)) { |
|
| 537 | + $result = 1; |
|
| 538 | + } |
|
| 539 | + break; |
|
| 540 | + /* king */ case 'K': |
|
| 541 | + if (\abs($fx - $dx) > 1 || \abs($fy - $dy) > 1) { |
|
| 542 | + break; |
|
| 543 | + } |
|
| 544 | + $kings = 0; |
|
| 545 | + $adj_tiles = $this->getAdjTiles($dest_pos); |
|
| 546 | + foreach ($adj_tiles as $tile) { |
|
| 547 | + if ('K' == $this->board[$tile][1]) { |
|
| 548 | + $kings++; |
|
| 549 | + } |
|
| 550 | + } |
|
| 551 | + if (2 == $kings) { |
|
| 552 | + break; |
|
| 553 | + } |
|
| 554 | + $result = 1; |
|
| 555 | + break; |
|
| 556 | + } |
|
| 557 | + |
|
| 558 | + /* DEBUG: echo " $result<br>"; */ |
|
| 559 | + |
|
| 560 | + return $result; |
|
| 561 | + } |
|
| 562 | + |
|
| 563 | + /** |
|
| 564 | + * Check whether a pawn can attack a tile. |
|
| 565 | + * |
|
| 566 | + * @param int $fig_pos Position of pawn |
|
| 567 | + * @param int $dest_pos Tile to check |
|
| 568 | + * @return bool True if pawn can attack |
|
| 569 | + * |
|
| 570 | + * @access private |
|
| 571 | + */ |
|
| 572 | + public function checkPawnAttack($fig_pos, $dest_pos) |
|
| 573 | + { |
|
| 574 | + if ('w' == $this->board[$fig_pos][0]) { |
|
| 575 | + if ($fig_pos % 8 > 0 && $dest_pos == $fig_pos + 7) { |
|
| 576 | + return 1; |
|
| 577 | + } |
|
| 578 | + |
|
| 579 | + if ($fig_pos % 8 < 7 && $dest_pos == $fig_pos + 9) { |
|
| 580 | + return 1; |
|
| 581 | + } |
|
| 582 | + } elseif ('b' == $this->board[$fig_pos][0]) { |
|
| 583 | + if ($fig_pos % 8 < 7 && $dest_pos == $fig_pos - 7) { |
|
| 584 | + return 1; |
|
| 585 | + } |
|
| 586 | + |
|
| 587 | + if ($fig_pos % 8 > 0 && $dest_pos == $fig_pos - 9) { |
|
| 588 | + return 1; |
|
| 589 | + } |
|
| 590 | + } |
|
| 591 | + |
|
| 592 | + return 0; |
|
| 593 | + } |
|
| 594 | + |
|
| 595 | + /** |
|
| 596 | + * Check whether a pawn move is legal. |
|
| 597 | + * |
|
| 598 | + * check whether pawn at figpos may move to destpos. |
|
| 599 | + * first move may be two tiles instead of just one. |
|
| 600 | + * again the last tile is not checked but just the path |
|
| 601 | + * in between. |
|
| 602 | + * |
|
| 603 | + * @param int $fig_pos Position of pawn. |
|
| 604 | + * @param int $dest_pos Destination tile. |
|
| 605 | + * @return bool True if move is legal |
|
| 606 | + * |
|
| 607 | + * @access private |
|
| 608 | + */ |
|
| 609 | + public function checkPawnMove($fig_pos, $dest_pos) |
|
| 610 | + { |
|
| 611 | + $first_move = 0; |
|
| 612 | + |
|
| 613 | + if ('w' == $this->board[$fig_pos][0]) { |
|
| 614 | + if ($fig_pos >= 8 && $fig_pos <= 15) { |
|
| 615 | + $first_move = 1; |
|
| 616 | + } |
|
| 617 | + |
|
| 618 | + if ($dest_pos == $fig_pos + 8) { |
|
| 619 | + return 1; |
|
| 620 | + } |
|
| 621 | + |
|
| 622 | + if ($first_move && ($dest_pos == $fig_pos + 16)) { |
|
| 623 | + if ($this->is_empty_tile($fig_pos + 8)) { |
|
| 624 | + return 1; |
|
| 625 | + } |
|
| 626 | + } |
|
| 627 | + } elseif ('b' == $this->board[$fig_pos][0]) { |
|
| 628 | + if ($fig_pos >= 48 && $fig_pos <= 55) { |
|
| 629 | + $first_move = 1; |
|
| 630 | + } |
|
| 631 | + |
|
| 632 | + if ($dest_pos == $fig_pos - 8) { |
|
| 633 | + return 1; |
|
| 634 | + } |
|
| 635 | + |
|
| 636 | + if ($first_move && ($dest_pos == $fig_pos - 16)) { |
|
| 637 | + if ($this->is_empty_tile($fig_pos - 8)) { |
|
| 638 | + return 1; |
|
| 639 | + } |
|
| 640 | + } |
|
| 641 | + } |
|
| 642 | + |
|
| 643 | + return 0; |
|
| 644 | + } |
|
| 645 | + |
|
| 646 | + /** |
|
| 647 | + * Check whether a tile is under attack by the specified player. |
|
| 648 | + * |
|
| 649 | + * @param string $opp Attacking color ('w' or 'b') |
|
| 650 | + * @param int $dest_pos Tile to check |
|
| 651 | + * @return bool |
|
| 652 | + * |
|
| 653 | + * @access private |
|
| 654 | + */ |
|
| 655 | + public function tileIsUnderAttack($opp, $dest_pos) |
|
| 656 | + { |
|
| 657 | + #var_dump('tileIsUnderAttack, opp', $opp, 'dest_pos', $dest_pos, 'board', $board);#*#DEBUG# |
|
| 658 | + |
|
| 659 | + for ($i = 0; $i < 64; $i++) { |
|
| 660 | + if ($this->board[$i][0] == $opp) { |
|
| 661 | + if (('P' == $this->board[$i][1] && $this->checkPawnAttack($i, $dest_pos)) |
|
| 662 | + || ('P' != $this->board[$i][1] |
|
| 663 | + && $this->tileIsReachable($this->board[$i][1], $i, $dest_pos))) { |
|
| 664 | + /*DEBUG: echo "attack test: $i: ",$opp,"P<br>"; */ |
|
| 665 | + |
|
| 666 | + return 1; |
|
| 667 | + } |
|
| 668 | + } |
|
| 669 | + } |
|
| 670 | + |
|
| 671 | + return 0; |
|
| 672 | + } |
|
| 673 | + |
|
| 674 | + /** |
|
| 675 | + * Check whether a player's king can be attacked by his opponent. |
|
| 676 | + * |
|
| 677 | + * @param string $player Player's color ('w' or 'b') |
|
| 678 | + * @param string $opp Opponent's color ('w' or 'b') |
|
| 679 | + * @return bool |
|
| 680 | + * |
|
| 681 | + * @access private |
|
| 682 | + */ |
|
| 683 | + public function kingIsUnderAttack($player, $opp) |
|
| 684 | + { |
|
| 685 | + #var_dump('kingIsUnderAttack, player', $player, 'opp', $opp, 'board', $board);#*#DEBUG# |
|
| 686 | + |
|
| 687 | + for ($i = 0; $i < 64; $i++) { |
|
| 688 | + if ($this->board[$i][0] == $player && 'K' == $this->board[$i][1]) { |
|
| 689 | + $king_pos = $i; |
|
| 690 | + |
|
| 691 | + break; |
|
| 692 | + } |
|
| 693 | + } |
|
| 694 | + |
|
| 695 | + /*DEBUG: echo "$player king is at $king_pos<br>"; */ |
|
| 696 | + |
|
| 697 | + return $this->tileIsUnderAttack($opp, $king_pos); |
|
| 698 | + } |
|
| 699 | + |
|
| 700 | + /** |
|
| 701 | + * Check whether player's king is checkmated by his opponent. |
|
| 702 | + * |
|
| 703 | + * @param string $player Player's color ('w' or 'b') |
|
| 704 | + * @param string $opp Opponent's color ('w' or 'b') |
|
| 705 | + * @return bool |
|
| 706 | + * |
|
| 707 | + * @access private |
|
| 708 | + */ |
|
| 709 | + public function isCheckMate($player, $opp) |
|
| 710 | + { |
|
| 711 | + for ($i = 0; $i < 64; $i++) { |
|
| 712 | + if ($this->board[$i][0] == $player && 'K' == $this->board[$i][1]) { |
|
| 713 | + $king_pos = $i; |
|
| 714 | + |
|
| 715 | + $king_x = $i % 8; |
|
| 716 | + |
|
| 717 | + $king_y = \floor($i / 8); |
|
| 718 | + |
|
| 719 | + break; |
|
| 720 | + } |
|
| 721 | + } |
|
| 722 | + |
|
| 723 | + /* test adjacent tiles while king is temporarly removed */ |
|
| 724 | + |
|
| 725 | + $adj_tiles = $this->getAdjTiles($king_pos); |
|
| 726 | + |
|
| 727 | + $contents = $this->board[$king_pos]; |
|
| 728 | + |
|
| 729 | + $this->clear_tile($king_pos); |
|
| 730 | + |
|
| 731 | + foreach ($adj_tiles as $dest_pos) { |
|
| 732 | + if ($this->board[$dest_pos][0] == $player) { |
|
| 733 | + continue; |
|
| 734 | + } |
|
| 735 | + |
|
| 736 | + if ($this->tileIsUnderAttack($opp, $dest_pos)) { |
|
| 737 | + continue; |
|
| 738 | + } |
|
| 739 | + |
|
| 740 | + $this->board[$king_pos] = $contents; |
|
| 741 | + |
|
| 742 | + return 0; |
|
| 743 | + } |
|
| 744 | + |
|
| 745 | + $this->board[$king_pos] = $contents; |
|
| 746 | + |
|
| 747 | + /* DEBUG: echo "King cannot escape by itself! "; */ |
|
| 748 | + |
|
| 749 | + /* get all figures that attack the king */ |
|
| 750 | + |
|
| 751 | + $attackers = []; |
|
| 752 | + |
|
| 753 | + $count = 0; |
|
| 754 | + |
|
| 755 | + for ($i = 0; $i < 64; $i++) { |
|
| 756 | + if ($this->board[$i][0] == $opp) { |
|
| 757 | + if (('P' == $this->board[$i][1] && $this->checkPawnAttack($i, $king_pos)) |
|
| 758 | + || ('P' != $this->board[$i][1] |
|
| 759 | + && $this->tileIsReachable($this->board[$i][1], $i, $king_pos))) { |
|
| 760 | + $attackers[$count++] = $i; |
|
| 761 | + } |
|
| 762 | + } |
|
| 763 | + } |
|
| 764 | 764 | |
| 765 | - /* DEBUG: |
|
| 765 | + /* DEBUG: |
|
| 766 | 766 | for( $i = 0; $i < $count; $i++ ) |
| 767 | 767 | echo "Attacker: $attackers[$i] "; |
| 768 | 768 | echo "Attackercount: ",count($attackers), " "; */ |
| 769 | 769 | |
| 770 | - /* if more than one there is no chance to escape */ |
|
| 770 | + /* if more than one there is no chance to escape */ |
|
| 771 | 771 | |
| 772 | - if ($count > 1) { |
|
| 773 | - return 1; |
|
| 774 | - } |
|
| 772 | + if ($count > 1) { |
|
| 773 | + return 1; |
|
| 774 | + } |
|
| 775 | 775 | |
| 776 | - /* check whether attacker can be killed by own figure */ |
|
| 776 | + /* check whether attacker can be killed by own figure */ |
|
| 777 | 777 | |
| 778 | - $dest_pos = $attackers[0]; |
|
| 778 | + $dest_pos = $attackers[0]; |
|
| 779 | 779 | |
| 780 | - for ($i = 0; $i < 64; $i++) { |
|
| 781 | - if ($this->board[$i][0] == $player) { |
|
| 782 | - if (('P' == $this->board[$i][1] && $this->checkPawnAttack($i, $dest_pos)) |
|
| 783 | - || ('P' != $this->board[$i][1] && 'K' != $this->board[$i][1] |
|
| 784 | - && $this->tileIsReachable($this->board[$i][1], $i, $dest_pos)) |
|
| 785 | - || ('K' == $this->board[$i][1] |
|
| 786 | - && $this->tileIsReachable($this->board[$i][1], $i, $dest_pos) |
|
| 787 | - && !$this->tileIsUnderAttack($opp, $dest_pos))) { |
|
| 788 | - /* DEBUG: echo "candidate: $i "; */ |
|
| 780 | + for ($i = 0; $i < 64; $i++) { |
|
| 781 | + if ($this->board[$i][0] == $player) { |
|
| 782 | + if (('P' == $this->board[$i][1] && $this->checkPawnAttack($i, $dest_pos)) |
|
| 783 | + || ('P' != $this->board[$i][1] && 'K' != $this->board[$i][1] |
|
| 784 | + && $this->tileIsReachable($this->board[$i][1], $i, $dest_pos)) |
|
| 785 | + || ('K' == $this->board[$i][1] |
|
| 786 | + && $this->tileIsReachable($this->board[$i][1], $i, $dest_pos) |
|
| 787 | + && !$this->tileIsUnderAttack($opp, $dest_pos))) { |
|
| 788 | + /* DEBUG: echo "candidate: $i "; */ |
|
| 789 | 789 | |
| 790 | - $can_kill_atk = 0; |
|
| 790 | + $can_kill_atk = 0; |
|
| 791 | 791 | |
| 792 | - $contents_def = $this->board[$i]; |
|
| 792 | + $contents_def = $this->board[$i]; |
|
| 793 | 793 | |
| 794 | - $contents_atk = $this->board[$dest_pos]; |
|
| 794 | + $contents_atk = $this->board[$dest_pos]; |
|
| 795 | 795 | |
| 796 | - $this->board[$dest_pos] = $this->board[$i]; |
|
| 796 | + $this->board[$dest_pos] = $this->board[$i]; |
|
| 797 | 797 | |
| 798 | - $this->clear_tile($i); |
|
| 798 | + $this->clear_tile($i); |
|
| 799 | 799 | |
| 800 | - if (!$this->tileIsUnderAttack($opp, $king_pos)) { |
|
| 801 | - $can_kill_atk = 1; |
|
| 802 | - } |
|
| 800 | + if (!$this->tileIsUnderAttack($opp, $king_pos)) { |
|
| 801 | + $can_kill_atk = 1; |
|
| 802 | + } |
|
| 803 | 803 | |
| 804 | - $this->board[$i] = $contents_def; |
|
| 804 | + $this->board[$i] = $contents_def; |
|
| 805 | 805 | |
| 806 | - $this->board[$dest_pos] = $contents_atk; |
|
| 806 | + $this->board[$dest_pos] = $contents_atk; |
|
| 807 | 807 | |
| 808 | - if ($can_kill_atk) { |
|
| 809 | - /* DEBUG: echo "$i can kill attacker"; */ |
|
| 808 | + if ($can_kill_atk) { |
|
| 809 | + /* DEBUG: echo "$i can kill attacker"; */ |
|
| 810 | 810 | |
| 811 | - return 0; |
|
| 812 | - } |
|
| 813 | - } |
|
| 814 | - } |
|
| 815 | - } |
|
| 811 | + return 0; |
|
| 812 | + } |
|
| 813 | + } |
|
| 814 | + } |
|
| 815 | + } |
|
| 816 | 816 | |
| 817 | - /* check whether own unit can block the way */ |
|
| 817 | + /* check whether own unit can block the way */ |
|
| 818 | 818 | |
| 819 | - /* if attacking unit is a knight there |
|
| 819 | + /* if attacking unit is a knight there |
|
| 820 | 820 | * is no way to block the path */ |
| 821 | 821 | |
| 822 | - if ('N' == $this->board[$dest_pos][1]) { |
|
| 823 | - return 1; |
|
| 824 | - } |
|
| 822 | + if ('N' == $this->board[$dest_pos][1]) { |
|
| 823 | + return 1; |
|
| 824 | + } |
|
| 825 | 825 | |
| 826 | - /* if enemy is adjacent to king there is no |
|
| 826 | + /* if enemy is adjacent to king there is no |
|
| 827 | 827 | * way either */ |
| 828 | 828 | |
| 829 | - $dest_x = $dest_pos % 8; |
|
| 829 | + $dest_x = $dest_pos % 8; |
|
| 830 | 830 | |
| 831 | - $dest_y = \floor($dest_pos / 8); |
|
| 831 | + $dest_y = \floor($dest_pos / 8); |
|
| 832 | 832 | |
| 833 | - if (\abs($dest_x - $king_x) <= 1 && \abs($dest_y - $king_y) <= 1) { |
|
| 834 | - return 1; |
|
| 835 | - } |
|
| 833 | + if (\abs($dest_x - $king_x) <= 1 && \abs($dest_y - $king_y) <= 1) { |
|
| 834 | + return 1; |
|
| 835 | + } |
|
| 836 | 836 | |
| 837 | - /* get the list of tiles between king and attacking |
|
| 837 | + /* get the list of tiles between king and attacking |
|
| 838 | 838 | * unit that can be blocked to stop the attack */ |
| 839 | 839 | |
| 840 | - $change = $this->getPathChange($this->board[$dest_pos][1], $dest_pos, $king_pos); |
|
| 841 | - |
|
| 842 | - /* DEBUG: echo "path change: $change "; */ |
|
| 843 | - |
|
| 844 | - $path = $this->getPath($dest_pos + $change, $king_pos, $change); |
|
| 845 | - |
|
| 846 | - /* DEBUG: foreach( $path as $tile ) echo "tile: $tile "; */ |
|
| 847 | - |
|
| 848 | - foreach ($path as $pos) { |
|
| 849 | - for ($i = 0; $i < 64; $i++) { |
|
| 850 | - if ($this->board[$i][0] == $player) { |
|
| 851 | - if (('P' == $this->board[$i][1] && $this->checkPawnMove($i, $pos)) |
|
| 852 | - || ('P' != $this->board[$i][1] && 'K' != $this->board[$i][1] |
|
| 853 | - && $this->tileIsReachable($this->board[$i][1], $i, $pos))) { |
|
| 854 | - /* DEBUG: echo "$i can block "; */ |
|
| 855 | - |
|
| 856 | - return 0; |
|
| 857 | - } |
|
| 858 | - } |
|
| 859 | - } |
|
| 860 | - } |
|
| 861 | - |
|
| 862 | - return 1; |
|
| 863 | - } |
|
| 864 | - |
|
| 865 | - /** |
|
| 866 | - * Check whether player is stalemated. |
|
| 867 | - * |
|
| 868 | - * @param string $player Color of player who has the move ('w' or 'b') |
|
| 869 | - * @param string $opp Opponent's color ('w' or 'b') |
|
| 870 | - * @return bool |
|
| 871 | - * |
|
| 872 | - * @todo recognize when move is not possible because of check |
|
| 873 | - * |
|
| 874 | - * @access private |
|
| 875 | - */ |
|
| 876 | - public function isStaleMate($player, $opp) |
|
| 877 | - { |
|
| 878 | - for ($i = 0; $i < 64; $i++) { |
|
| 879 | - if ($this->board[$i][0] == $player) { |
|
| 880 | - switch ($this->board[$i][1]) { |
|
| 881 | - case 'K': |
|
| 882 | - $adj_tiles = $this->getAdjTiles($i); |
|
| 883 | - foreach ($adj_tiles as $pos) { |
|
| 884 | - if ($this->board[$pos][0] == $player) { |
|
| 885 | - continue; |
|
| 886 | - } |
|
| 887 | - |
|
| 888 | - if ($this->tileIsUnderAttack($opp, $pos)) { |
|
| 889 | - continue; |
|
| 890 | - } |
|
| 891 | - |
|
| 892 | - return 0; |
|
| 893 | - } |
|
| 894 | - /* DEBUG: echo "King cannot escape by itself! "; */ |
|
| 895 | - break; |
|
| 896 | - case 'P': |
|
| 897 | - if ('w' == $player) { |
|
| 898 | - if ($this->is_empty_tile($i + 8)) { |
|
| 899 | - return 0; |
|
| 900 | - } |
|
| 901 | - |
|
| 902 | - if ($i % 8 > 0 && $this->board[$i + 7][0] != $player) { |
|
| 903 | - return 0; |
|
| 904 | - } |
|
| 905 | - |
|
| 906 | - if ($i % 8 < 7 && $this->board[$i + 9][0] != $player) { |
|
| 907 | - return 0; |
|
| 908 | - } |
|
| 909 | - } else { |
|
| 910 | - if ($this->is_empty_tile($i - 8)) { |
|
| 911 | - return 0; |
|
| 912 | - } |
|
| 913 | - |
|
| 914 | - if ($i % 8 > 0 && $this->board[$i - 9][0] != $player) { |
|
| 915 | - return 0; |
|
| 916 | - } |
|
| 917 | - |
|
| 918 | - if ($i % 8 < 7 && $this->board[$i - 7][0] != $player) { |
|
| 919 | - return 0; |
|
| 920 | - } |
|
| 921 | - } |
|
| 922 | - break; |
|
| 923 | - case 'B': |
|
| 924 | - if ($i - 9 >= 0 && $this->board[$i - 9][0] != $player) { |
|
| 925 | - return 0; |
|
| 926 | - } |
|
| 927 | - if ($i - 7 >= 0 && $this->board[$i - 7][0] != $player) { |
|
| 928 | - return 0; |
|
| 929 | - } |
|
| 930 | - if ($i + 9 <= 63 && $this->board[$i + 9][0] != $player) { |
|
| 931 | - return 0; |
|
| 932 | - } |
|
| 933 | - if ($i + 7 <= 63 && $this->board[$i + 7][0] != $player) { |
|
| 934 | - return 0; |
|
| 935 | - } |
|
| 936 | - break; |
|
| 937 | - case 'R': |
|
| 938 | - if ($i - 8 >= 0 && $this->board[$i - 8][0] != $player) { |
|
| 939 | - return 0; |
|
| 940 | - } |
|
| 941 | - if ($i - 1 >= 0 && $this->board[$i - 1][0] != $player) { |
|
| 942 | - return 0; |
|
| 943 | - } |
|
| 944 | - if ($i + 8 <= 63 && $this->board[$i + 8][0] != $player) { |
|
| 945 | - return 0; |
|
| 946 | - } |
|
| 947 | - if ($i + 1 <= 63 && $this->board[$i + 1][0] != $player) { |
|
| 948 | - return 0; |
|
| 949 | - } |
|
| 950 | - break; |
|
| 951 | - case 'Q': |
|
| 952 | - $adj_tiles = $this->getAdjTiles($i); |
|
| 953 | - foreach ($adj_tiles as $pos) { |
|
| 954 | - if ($this->board[$pos][0] != $player) { |
|
| 955 | - return 0; |
|
| 956 | - } |
|
| 957 | - } |
|
| 958 | - break; |
|
| 959 | - case 'N': |
|
| 960 | - if ($i - 17 >= 0 && $this->board[$i - 17][0] != $player) { |
|
| 961 | - return 0; |
|
| 962 | - } |
|
| 963 | - if ($i - 15 >= 0 && $this->board[$i - 15][0] != $player) { |
|
| 964 | - return 0; |
|
| 965 | - } |
|
| 966 | - if ($i - 6 >= 0 && $this->board[$i - 6][0] != $player) { |
|
| 967 | - return 0; |
|
| 968 | - } |
|
| 969 | - if ($i + 10 <= 63 && $this->board[$i + 10][0] != $player) { |
|
| 970 | - return 0; |
|
| 971 | - } |
|
| 972 | - if ($i + 17 <= 63 && $this->board[$i + 17][0] != $player) { |
|
| 973 | - return 0; |
|
| 974 | - } |
|
| 975 | - if ($i + 15 <= 63 && $this->board[$i + 15][0] != $player) { |
|
| 976 | - return 0; |
|
| 977 | - } |
|
| 978 | - if ($i + 6 <= 63 && $this->board[$i + 6][0] != $player) { |
|
| 979 | - return 0; |
|
| 980 | - } |
|
| 981 | - if ($i - 10 >= 0 && $this->board[$i - 10][0] != $player) { |
|
| 982 | - return 0; |
|
| 983 | - } |
|
| 984 | - break; |
|
| 985 | - } |
|
| 986 | - } |
|
| 987 | - } |
|
| 988 | - |
|
| 989 | - return 1; |
|
| 990 | - } |
|
| 991 | - |
|
| 992 | - /** |
|
| 993 | - * Generate informational text message with parameters. |
|
| 994 | - * |
|
| 995 | - * Example: |
|
| 996 | - * <pre> |
|
| 997 | - * echo move_msg('cannot find {$param[1]} pawn in column {$param[2]}', 'b', 'e'); |
|
| 998 | - * - prints: "cannot find b pawn in column e" |
|
| 999 | - * </pre> |
|
| 1000 | - * |
|
| 1001 | - * @param string $text |
|
| 1002 | - * @return string |
|
| 1003 | - * |
|
| 1004 | - * @access private |
|
| 1005 | - */ |
|
| 1006 | - public function move_msg($text) |
|
| 1007 | - { |
|
| 1008 | - $param = \func_get_args(); |
|
| 1009 | - |
|
| 1010 | - #var_dump('move_msg, text', $text, 'param', $param);#*#DEBUG# |
|
| 1011 | - |
|
| 1012 | - return eval("return \"$text\";"); |
|
| 1013 | - } |
|
| 1014 | - |
|
| 1015 | - /** |
|
| 1016 | - * Translate Standard Algebraic Notation (SAN) into a full move description. |
|
| 1017 | - * |
|
| 1018 | - * The completed move is placed in $this->ac_move. |
|
| 1019 | - * |
|
| 1020 | - * @param string $player 'w' or 'b' |
|
| 1021 | - * @param string $move |
|
| 1022 | - * <pre> |
|
| 1023 | - * [a-h][1-8|a-h][RNBQK] pawn move/attack |
|
| 1024 | - * [PRNBQK][a-h][1-8] figure move |
|
| 1025 | - * [PRNBQK][:x][a-h][1-8] figure attack |
|
| 1026 | - * [PRNBQK][1-8|a-h][a-h][1-8] ambigous figure move |
|
| 1027 | - * [a-h][:x][a-h][1-8][[RNBQK] ambigous pawn attack |
|
| 1028 | - * [PRNBQK][1-8|a-h][:x][a-h][1-8] ambigous figure attack |
|
| 1029 | - * </pre> |
|
| 1030 | - * @return string Empty string if successful, otherwise error message |
|
| 1031 | - * |
|
| 1032 | - * @access private |
|
| 1033 | - */ |
|
| 1034 | - public function completeMove($player, $move) |
|
| 1035 | - { |
|
| 1036 | - /* |
|
| 840 | + $change = $this->getPathChange($this->board[$dest_pos][1], $dest_pos, $king_pos); |
|
| 841 | + |
|
| 842 | + /* DEBUG: echo "path change: $change "; */ |
|
| 843 | + |
|
| 844 | + $path = $this->getPath($dest_pos + $change, $king_pos, $change); |
|
| 845 | + |
|
| 846 | + /* DEBUG: foreach( $path as $tile ) echo "tile: $tile "; */ |
|
| 847 | + |
|
| 848 | + foreach ($path as $pos) { |
|
| 849 | + for ($i = 0; $i < 64; $i++) { |
|
| 850 | + if ($this->board[$i][0] == $player) { |
|
| 851 | + if (('P' == $this->board[$i][1] && $this->checkPawnMove($i, $pos)) |
|
| 852 | + || ('P' != $this->board[$i][1] && 'K' != $this->board[$i][1] |
|
| 853 | + && $this->tileIsReachable($this->board[$i][1], $i, $pos))) { |
|
| 854 | + /* DEBUG: echo "$i can block "; */ |
|
| 855 | + |
|
| 856 | + return 0; |
|
| 857 | + } |
|
| 858 | + } |
|
| 859 | + } |
|
| 860 | + } |
|
| 861 | + |
|
| 862 | + return 1; |
|
| 863 | + } |
|
| 864 | + |
|
| 865 | + /** |
|
| 866 | + * Check whether player is stalemated. |
|
| 867 | + * |
|
| 868 | + * @param string $player Color of player who has the move ('w' or 'b') |
|
| 869 | + * @param string $opp Opponent's color ('w' or 'b') |
|
| 870 | + * @return bool |
|
| 871 | + * |
|
| 872 | + * @todo recognize when move is not possible because of check |
|
| 873 | + * |
|
| 874 | + * @access private |
|
| 875 | + */ |
|
| 876 | + public function isStaleMate($player, $opp) |
|
| 877 | + { |
|
| 878 | + for ($i = 0; $i < 64; $i++) { |
|
| 879 | + if ($this->board[$i][0] == $player) { |
|
| 880 | + switch ($this->board[$i][1]) { |
|
| 881 | + case 'K': |
|
| 882 | + $adj_tiles = $this->getAdjTiles($i); |
|
| 883 | + foreach ($adj_tiles as $pos) { |
|
| 884 | + if ($this->board[$pos][0] == $player) { |
|
| 885 | + continue; |
|
| 886 | + } |
|
| 887 | + |
|
| 888 | + if ($this->tileIsUnderAttack($opp, $pos)) { |
|
| 889 | + continue; |
|
| 890 | + } |
|
| 891 | + |
|
| 892 | + return 0; |
|
| 893 | + } |
|
| 894 | + /* DEBUG: echo "King cannot escape by itself! "; */ |
|
| 895 | + break; |
|
| 896 | + case 'P': |
|
| 897 | + if ('w' == $player) { |
|
| 898 | + if ($this->is_empty_tile($i + 8)) { |
|
| 899 | + return 0; |
|
| 900 | + } |
|
| 901 | + |
|
| 902 | + if ($i % 8 > 0 && $this->board[$i + 7][0] != $player) { |
|
| 903 | + return 0; |
|
| 904 | + } |
|
| 905 | + |
|
| 906 | + if ($i % 8 < 7 && $this->board[$i + 9][0] != $player) { |
|
| 907 | + return 0; |
|
| 908 | + } |
|
| 909 | + } else { |
|
| 910 | + if ($this->is_empty_tile($i - 8)) { |
|
| 911 | + return 0; |
|
| 912 | + } |
|
| 913 | + |
|
| 914 | + if ($i % 8 > 0 && $this->board[$i - 9][0] != $player) { |
|
| 915 | + return 0; |
|
| 916 | + } |
|
| 917 | + |
|
| 918 | + if ($i % 8 < 7 && $this->board[$i - 7][0] != $player) { |
|
| 919 | + return 0; |
|
| 920 | + } |
|
| 921 | + } |
|
| 922 | + break; |
|
| 923 | + case 'B': |
|
| 924 | + if ($i - 9 >= 0 && $this->board[$i - 9][0] != $player) { |
|
| 925 | + return 0; |
|
| 926 | + } |
|
| 927 | + if ($i - 7 >= 0 && $this->board[$i - 7][0] != $player) { |
|
| 928 | + return 0; |
|
| 929 | + } |
|
| 930 | + if ($i + 9 <= 63 && $this->board[$i + 9][0] != $player) { |
|
| 931 | + return 0; |
|
| 932 | + } |
|
| 933 | + if ($i + 7 <= 63 && $this->board[$i + 7][0] != $player) { |
|
| 934 | + return 0; |
|
| 935 | + } |
|
| 936 | + break; |
|
| 937 | + case 'R': |
|
| 938 | + if ($i - 8 >= 0 && $this->board[$i - 8][0] != $player) { |
|
| 939 | + return 0; |
|
| 940 | + } |
|
| 941 | + if ($i - 1 >= 0 && $this->board[$i - 1][0] != $player) { |
|
| 942 | + return 0; |
|
| 943 | + } |
|
| 944 | + if ($i + 8 <= 63 && $this->board[$i + 8][0] != $player) { |
|
| 945 | + return 0; |
|
| 946 | + } |
|
| 947 | + if ($i + 1 <= 63 && $this->board[$i + 1][0] != $player) { |
|
| 948 | + return 0; |
|
| 949 | + } |
|
| 950 | + break; |
|
| 951 | + case 'Q': |
|
| 952 | + $adj_tiles = $this->getAdjTiles($i); |
|
| 953 | + foreach ($adj_tiles as $pos) { |
|
| 954 | + if ($this->board[$pos][0] != $player) { |
|
| 955 | + return 0; |
|
| 956 | + } |
|
| 957 | + } |
|
| 958 | + break; |
|
| 959 | + case 'N': |
|
| 960 | + if ($i - 17 >= 0 && $this->board[$i - 17][0] != $player) { |
|
| 961 | + return 0; |
|
| 962 | + } |
|
| 963 | + if ($i - 15 >= 0 && $this->board[$i - 15][0] != $player) { |
|
| 964 | + return 0; |
|
| 965 | + } |
|
| 966 | + if ($i - 6 >= 0 && $this->board[$i - 6][0] != $player) { |
|
| 967 | + return 0; |
|
| 968 | + } |
|
| 969 | + if ($i + 10 <= 63 && $this->board[$i + 10][0] != $player) { |
|
| 970 | + return 0; |
|
| 971 | + } |
|
| 972 | + if ($i + 17 <= 63 && $this->board[$i + 17][0] != $player) { |
|
| 973 | + return 0; |
|
| 974 | + } |
|
| 975 | + if ($i + 15 <= 63 && $this->board[$i + 15][0] != $player) { |
|
| 976 | + return 0; |
|
| 977 | + } |
|
| 978 | + if ($i + 6 <= 63 && $this->board[$i + 6][0] != $player) { |
|
| 979 | + return 0; |
|
| 980 | + } |
|
| 981 | + if ($i - 10 >= 0 && $this->board[$i - 10][0] != $player) { |
|
| 982 | + return 0; |
|
| 983 | + } |
|
| 984 | + break; |
|
| 985 | + } |
|
| 986 | + } |
|
| 987 | + } |
|
| 988 | + |
|
| 989 | + return 1; |
|
| 990 | + } |
|
| 991 | + |
|
| 992 | + /** |
|
| 993 | + * Generate informational text message with parameters. |
|
| 994 | + * |
|
| 995 | + * Example: |
|
| 996 | + * <pre> |
|
| 997 | + * echo move_msg('cannot find {$param[1]} pawn in column {$param[2]}', 'b', 'e'); |
|
| 998 | + * - prints: "cannot find b pawn in column e" |
|
| 999 | + * </pre> |
|
| 1000 | + * |
|
| 1001 | + * @param string $text |
|
| 1002 | + * @return string |
|
| 1003 | + * |
|
| 1004 | + * @access private |
|
| 1005 | + */ |
|
| 1006 | + public function move_msg($text) |
|
| 1007 | + { |
|
| 1008 | + $param = \func_get_args(); |
|
| 1009 | + |
|
| 1010 | + #var_dump('move_msg, text', $text, 'param', $param);#*#DEBUG# |
|
| 1011 | + |
|
| 1012 | + return eval("return \"$text\";"); |
|
| 1013 | + } |
|
| 1014 | + |
|
| 1015 | + /** |
|
| 1016 | + * Translate Standard Algebraic Notation (SAN) into a full move description. |
|
| 1017 | + * |
|
| 1018 | + * The completed move is placed in $this->ac_move. |
|
| 1019 | + * |
|
| 1020 | + * @param string $player 'w' or 'b' |
|
| 1021 | + * @param string $move |
|
| 1022 | + * <pre> |
|
| 1023 | + * [a-h][1-8|a-h][RNBQK] pawn move/attack |
|
| 1024 | + * [PRNBQK][a-h][1-8] figure move |
|
| 1025 | + * [PRNBQK][:x][a-h][1-8] figure attack |
|
| 1026 | + * [PRNBQK][1-8|a-h][a-h][1-8] ambigous figure move |
|
| 1027 | + * [a-h][:x][a-h][1-8][[RNBQK] ambigous pawn attack |
|
| 1028 | + * [PRNBQK][1-8|a-h][:x][a-h][1-8] ambigous figure attack |
|
| 1029 | + * </pre> |
|
| 1030 | + * @return string Empty string if successful, otherwise error message |
|
| 1031 | + * |
|
| 1032 | + * @access private |
|
| 1033 | + */ |
|
| 1034 | + public function completeMove($player, $move) |
|
| 1035 | + { |
|
| 1036 | + /* |
|
| 1037 | 1037 | * [a-h][1-8|a-h][RNBQK] pawn move/attack |
| 1038 | 1038 | * [PRNBQK][a-h][1-8] figure move |
| 1039 | 1039 | * [PRNBQK][:x][a-h][1-8] figure attack |
@@ -1042,1298 +1042,1298 @@ discard block |
||
| 1042 | 1042 | * [PRNBQK][1-8|a-h][:x][a-h][1-8] ambigous figure attack |
| 1043 | 1043 | */ |
| 1044 | 1044 | |
| 1045 | - $error = _MD_CHESS_MOVE_UNKNOWN; // "format is totally unknown!" |
|
| 1045 | + $error = _MD_CHESS_MOVE_UNKNOWN; // "format is totally unknown!" |
|
| 1046 | 1046 | |
| 1047 | - $this->ac_move = $move; |
|
| 1047 | + $this->ac_move = $move; |
|
| 1048 | 1048 | |
| 1049 | - if (\mb_strlen($move) >= 6) { |
|
| 1050 | - /* full move: a pawn requires a ? in the end |
|
| 1049 | + if (\mb_strlen($move) >= 6) { |
|
| 1050 | + /* full move: a pawn requires a ? in the end |
|
| 1051 | 1051 | * to automatically choose a queen on last line */ |
| 1052 | 1052 | |
| 1053 | - if (0 === \strpos($move, 'P')) { |
|
| 1054 | - if ($move[\mb_strlen($move) - 1] < 'A' || $move[\mb_strlen($move) - 1] > 'Z') { |
|
| 1055 | - $this->ac_move = "$move?"; |
|
| 1056 | - } |
|
| 1057 | - } |
|
| 1053 | + if (0 === \strpos($move, 'P')) { |
|
| 1054 | + if ($move[\mb_strlen($move) - 1] < 'A' || $move[\mb_strlen($move) - 1] > 'Z') { |
|
| 1055 | + $this->ac_move = "$move?"; |
|
| 1056 | + } |
|
| 1057 | + } |
|
| 1058 | 1058 | |
| 1059 | - return ''; |
|
| 1060 | - } |
|
| 1059 | + return ''; |
|
| 1060 | + } |
|
| 1061 | 1061 | |
| 1062 | - /* allow last letter to be a capital one indicating |
|
| 1062 | + /* allow last letter to be a capital one indicating |
|
| 1063 | 1063 | * the chessmen a pawn is supposed to transform into, |
| 1064 | 1064 | * when entering the last file. we split this character |
| 1065 | 1065 | * to keep the autocompletion process the same. */ |
| 1066 | 1066 | |
| 1067 | - $pawn_upg = '?'; |
|
| 1067 | + $pawn_upg = '?'; |
|
| 1068 | 1068 | |
| 1069 | - if ($move[\mb_strlen($move) - 1] >= 'A' && $move[\mb_strlen($move) - 1] <= 'Z') { |
|
| 1070 | - $pawn_upg = $move[\mb_strlen($move) - 1]; |
|
| 1069 | + if ($move[\mb_strlen($move) - 1] >= 'A' && $move[\mb_strlen($move) - 1] <= 'Z') { |
|
| 1070 | + $pawn_upg = $move[\mb_strlen($move) - 1]; |
|
| 1071 | 1071 | |
| 1072 | - $move = \mb_substr($move, 0, -1); |
|
| 1073 | - } |
|
| 1072 | + $move = \mb_substr($move, 0, -1); |
|
| 1073 | + } |
|
| 1074 | 1074 | |
| 1075 | - // remove trailing '=', if present |
|
| 1075 | + // remove trailing '=', if present |
|
| 1076 | 1076 | |
| 1077 | - if ('=' == $move[mb_strlen($move) - 1]) { |
|
| 1078 | - $move = \mb_substr($move, 0, -1); |
|
| 1079 | - } |
|
| 1077 | + if ('=' == $move[mb_strlen($move) - 1]) { |
|
| 1078 | + $move = \mb_substr($move, 0, -1); |
|
| 1079 | + } |
|
| 1080 | 1080 | |
| 1081 | - if ('P' == $pawn_upg || 'K' == $pawn_upg) { |
|
| 1082 | - return _MD_CHESS_MOVE_PAWN_MAY_BECOME; |
|
| 1083 | - } // "A pawn may only become either a knight, a bishop, a rook or a queen!" |
|
| 1081 | + if ('P' == $pawn_upg || 'K' == $pawn_upg) { |
|
| 1082 | + return _MD_CHESS_MOVE_PAWN_MAY_BECOME; |
|
| 1083 | + } // "A pawn may only become either a knight, a bishop, a rook or a queen!" |
|
| 1084 | 1084 | |
| 1085 | - if ($move[0] >= 'a' && $move[0] <= 'h') { |
|
| 1086 | - /* pawn move. either it's 2 or for characters as |
|
| 1085 | + if ($move[0] >= 'a' && $move[0] <= 'h') { |
|
| 1086 | + /* pawn move. either it's 2 or for characters as |
|
| 1087 | 1087 | * listed above */ |
| 1088 | 1088 | |
| 1089 | - if (4 == mb_strlen($move)) { |
|
| 1090 | - if ('x' != $move[1]) { |
|
| 1091 | - return _MD_CHESS_MOVE_USE_X; |
|
| 1092 | - } // "use x to indicate an attack" |
|
| 1089 | + if (4 == mb_strlen($move)) { |
|
| 1090 | + if ('x' != $move[1]) { |
|
| 1091 | + return _MD_CHESS_MOVE_USE_X; |
|
| 1092 | + } // "use x to indicate an attack" |
|
| 1093 | 1093 | |
| 1094 | - $dest_x = $move[2]; |
|
| 1094 | + $dest_x = $move[2]; |
|
| 1095 | 1095 | |
| 1096 | - $dest_y = $move[3]; |
|
| 1096 | + $dest_y = $move[3]; |
|
| 1097 | 1097 | |
| 1098 | - $src_x = $move[0]; |
|
| 1098 | + $src_x = $move[0]; |
|
| 1099 | 1099 | |
| 1100 | - if ('w' == $player) { |
|
| 1101 | - $src_y = $dest_y - 1; |
|
| 1102 | - } else { |
|
| 1103 | - $src_y = $dest_y + 1; |
|
| 1104 | - } |
|
| 1100 | + if ('w' == $player) { |
|
| 1101 | + $src_y = $dest_y - 1; |
|
| 1102 | + } else { |
|
| 1103 | + $src_y = $dest_y + 1; |
|
| 1104 | + } |
|
| 1105 | 1105 | |
| 1106 | - $this->ac_move = \sprintf( |
|
| 1107 | - 'P%s%dx%s%d%s', |
|
| 1108 | - $src_x, |
|
| 1109 | - $src_y, |
|
| 1110 | - $dest_x, |
|
| 1111 | - $dest_y, |
|
| 1112 | - $pawn_upg |
|
| 1113 | - ); |
|
| 1106 | + $this->ac_move = \sprintf( |
|
| 1107 | + 'P%s%dx%s%d%s', |
|
| 1108 | + $src_x, |
|
| 1109 | + $src_y, |
|
| 1110 | + $dest_x, |
|
| 1111 | + $dest_y, |
|
| 1112 | + $pawn_upg |
|
| 1113 | + ); |
|
| 1114 | 1114 | |
| 1115 | - return ''; |
|
| 1116 | - } elseif (2 == mb_strlen($move)) { |
|
| 1117 | - $fig = \sprintf('%sP', $player); |
|
| 1115 | + return ''; |
|
| 1116 | + } elseif (2 == mb_strlen($move)) { |
|
| 1117 | + $fig = \sprintf('%sP', $player); |
|
| 1118 | 1118 | |
| 1119 | - if ($move[1] >= '1' && $move[1] <= '8') { |
|
| 1120 | - /* pawn move */ |
|
| 1119 | + if ($move[1] >= '1' && $move[1] <= '8') { |
|
| 1120 | + /* pawn move */ |
|
| 1121 | 1121 | |
| 1122 | - $pos = $this->boardCoordToIndex($move); |
|
| 1122 | + $pos = $this->boardCoordToIndex($move); |
|
| 1123 | 1123 | |
| 1124 | - if (64 == $pos) { |
|
| 1125 | - return $this->move_msg(_MD_CHESS_MOVE_COORD_INVALID, $move); |
|
| 1126 | - } // "coordinate $move is invalid" |
|
| 1124 | + if (64 == $pos) { |
|
| 1125 | + return $this->move_msg(_MD_CHESS_MOVE_COORD_INVALID, $move); |
|
| 1126 | + } // "coordinate $move is invalid" |
|
| 1127 | 1127 | |
| 1128 | - if ('w' == $player) { |
|
| 1129 | - while ($pos >= 0 && $this->board[$pos] != $fig) { |
|
| 1130 | - $pos -= 8; |
|
| 1131 | - } |
|
| 1128 | + if ('w' == $player) { |
|
| 1129 | + while ($pos >= 0 && $this->board[$pos] != $fig) { |
|
| 1130 | + $pos -= 8; |
|
| 1131 | + } |
|
| 1132 | 1132 | |
| 1133 | - if ($pos < 0) { |
|
| 1134 | - $not_found = 1; |
|
| 1135 | - } |
|
| 1136 | - } else { |
|
| 1137 | - while ($pos <= 63 && $this->board[$pos] != $fig) { |
|
| 1138 | - $pos += 8; |
|
| 1139 | - } |
|
| 1133 | + if ($pos < 0) { |
|
| 1134 | + $not_found = 1; |
|
| 1135 | + } |
|
| 1136 | + } else { |
|
| 1137 | + while ($pos <= 63 && $this->board[$pos] != $fig) { |
|
| 1138 | + $pos += 8; |
|
| 1139 | + } |
|
| 1140 | 1140 | |
| 1141 | - if ($pos > 63) { |
|
| 1142 | - $not_found = 1; |
|
| 1143 | - } |
|
| 1144 | - } |
|
| 1141 | + if ($pos > 63) { |
|
| 1142 | + $not_found = 1; |
|
| 1143 | + } |
|
| 1144 | + } |
|
| 1145 | 1145 | |
| 1146 | - $pos = $this->boardIndexToCoord($pos); |
|
| 1146 | + $pos = $this->boardIndexToCoord($pos); |
|
| 1147 | 1147 | |
| 1148 | - if ((isset($not_found) && $not_found) || '' == $pos) { |
|
| 1149 | - return $this->move_msg(_MD_CHESS_MOVE_CANNOT_FIND_PAWN, $player, $move[0]); // "cannot find $player pawn in column $move[0]" |
|
| 1150 | - } |
|
| 1148 | + if ((isset($not_found) && $not_found) || '' == $pos) { |
|
| 1149 | + return $this->move_msg(_MD_CHESS_MOVE_CANNOT_FIND_PAWN, $player, $move[0]); // "cannot find $player pawn in column $move[0]" |
|
| 1150 | + } |
|
| 1151 | 1151 | |
| 1152 | - $this->ac_move = \sprintf('P%s-%s%s', $pos, $move, $pawn_upg); |
|
| 1152 | + $this->ac_move = \sprintf('P%s-%s%s', $pos, $move, $pawn_upg); |
|
| 1153 | 1153 | |
| 1154 | - return ''; |
|
| 1155 | - } |
|
| 1154 | + return ''; |
|
| 1155 | + } |
|
| 1156 | 1156 | |
| 1157 | - /* notation: [a-h][a-h] for pawn attack no longer allowed |
|
| 1157 | + /* notation: [a-h][a-h] for pawn attack no longer allowed |
|
| 1158 | 1158 | * except for history browser */ |
| 1159 | 1159 | |
| 1160 | - if (0 == $this->browsing_mode) { |
|
| 1161 | - return _MD_CHESS_MOVE_USE_NOTATION; |
|
| 1162 | - } // "please use denotation [a-h]x[a-h][1-8] for pawn attacks (see help for more information)" |
|
| 1160 | + if (0 == $this->browsing_mode) { |
|
| 1161 | + return _MD_CHESS_MOVE_USE_NOTATION; |
|
| 1162 | + } // "please use denotation [a-h]x[a-h][1-8] for pawn attacks (see help for more information)" |
|
| 1163 | 1163 | |
| 1164 | - /* pawn attack must be only one pawn in column! */ |
|
| 1164 | + /* pawn attack must be only one pawn in column! */ |
|
| 1165 | 1165 | |
| 1166 | - $pawns = 0; |
|
| 1166 | + $pawns = 0; |
|
| 1167 | 1167 | |
| 1168 | - $start = $this->boardCoordToIndex(\sprintf('%s1', $move[0])); |
|
| 1168 | + $start = $this->boardCoordToIndex(\sprintf('%s1', $move[0])); |
|
| 1169 | 1169 | |
| 1170 | - if (64 == $start) { |
|
| 1171 | - return $this->move_msg(_MD_CHESS_MOVE_COORD_INVALID, $move[0]); |
|
| 1172 | - } // "coordinate $move[0] is invalid" |
|
| 1170 | + if (64 == $start) { |
|
| 1171 | + return $this->move_msg(_MD_CHESS_MOVE_COORD_INVALID, $move[0]); |
|
| 1172 | + } // "coordinate $move[0] is invalid" |
|
| 1173 | 1173 | |
| 1174 | - for ($i = 1; $i <= 8; $i++, $start += 8) { |
|
| 1175 | - if ($this->board[$start] == $fig) { |
|
| 1176 | - $pawns++; |
|
| 1174 | + for ($i = 1; $i <= 8; $i++, $start += 8) { |
|
| 1175 | + if ($this->board[$start] == $fig) { |
|
| 1176 | + $pawns++; |
|
| 1177 | 1177 | |
| 1178 | - $pawn_line = $i; |
|
| 1179 | - } |
|
| 1180 | - } |
|
| 1178 | + $pawn_line = $i; |
|
| 1179 | + } |
|
| 1180 | + } |
|
| 1181 | 1181 | |
| 1182 | - if (0 == $pawns) { |
|
| 1183 | - return $this->move_msg(_MD_CHESS_MOVE_NO_PAWN, $move[0]); |
|
| 1184 | - } // "there is no pawn in column $move[0]" |
|
| 1182 | + if (0 == $pawns) { |
|
| 1183 | + return $this->move_msg(_MD_CHESS_MOVE_NO_PAWN, $move[0]); |
|
| 1184 | + } // "there is no pawn in column $move[0]" |
|
| 1185 | 1185 | |
| 1186 | - elseif ($pawns > 1) { |
|
| 1187 | - return $this->move_msg(_MD_CHESS_MOVE_TWO_PAWNS, $move[0]); |
|
| 1188 | - } // "there is more than one pawn in column $move[0]" |
|
| 1186 | + elseif ($pawns > 1) { |
|
| 1187 | + return $this->move_msg(_MD_CHESS_MOVE_TWO_PAWNS, $move[0]); |
|
| 1188 | + } // "there is more than one pawn in column $move[0]" |
|
| 1189 | 1189 | |
| 1190 | - if ('w' == $player) { |
|
| 1191 | - $dest_line = $pawn_line + 1; |
|
| 1192 | - } else { |
|
| 1193 | - $dest_line = $pawn_line - 1; |
|
| 1194 | - } |
|
| 1190 | + if ('w' == $player) { |
|
| 1191 | + $dest_line = $pawn_line + 1; |
|
| 1192 | + } else { |
|
| 1193 | + $dest_line = $pawn_line - 1; |
|
| 1194 | + } |
|
| 1195 | 1195 | |
| 1196 | - $this->ac_move = \sprintf( |
|
| 1197 | - 'P%s%dx%s%d', |
|
| 1198 | - $move[0], |
|
| 1199 | - $pawn_line, |
|
| 1200 | - $move[1], |
|
| 1201 | - $dest_line |
|
| 1202 | - ); |
|
| 1203 | - |
|
| 1204 | - return ''; |
|
| 1205 | - } |
|
| 1206 | - } else { |
|
| 1207 | - /* figure move */ |
|
| 1208 | - |
|
| 1209 | - $dest_coord = \mb_substr($move, \mb_strlen($move) - 2, 2); |
|
| 1210 | - |
|
| 1211 | - $action = $move[\mb_strlen($move) - 3]; |
|
| 1212 | - |
|
| 1213 | - if ('x' != $action) { |
|
| 1214 | - $action = '-'; |
|
| 1215 | - } |
|
| 1216 | - |
|
| 1217 | - if ('w' == $player) { |
|
| 1218 | - $figures = $this->w_figures; |
|
| 1219 | - } else { |
|
| 1220 | - $figures = $this->b_figures; |
|
| 1221 | - } |
|
| 1222 | - |
|
| 1223 | - $fig_count = 0; |
|
| 1224 | - |
|
| 1225 | - foreach ($figures as $figure) { |
|
| 1226 | - if ($figure[0] == $move[0]) { |
|
| 1227 | - $fig_count++; |
|
| 1228 | - |
|
| 1229 | - if (1 == $fig_count) { |
|
| 1230 | - $pos1 = \mb_substr($figure, 1, 2); |
|
| 1231 | - } else { |
|
| 1232 | - $pos2 = \mb_substr($figure, 1, 2); |
|
| 1233 | - } |
|
| 1234 | - } |
|
| 1235 | - } |
|
| 1236 | - |
|
| 1237 | - if (0 == $fig_count) { |
|
| 1238 | - return $this->move_msg(_MD_CHESS_MOVE_NO_FIGURE, $move[0], $this->getFullFigureName($move[0])); |
|
| 1239 | - } // sprintf("there is no figure %s = %s", $move[0], $this->getFullFigureName($move[0])) |
|
| 1240 | - |
|
| 1241 | - elseif (1 == $fig_count) { |
|
| 1242 | - $this->ac_move = \sprintf( |
|
| 1243 | - '%s%s%s%s', |
|
| 1244 | - $move[0], |
|
| 1245 | - $pos1, |
|
| 1246 | - $action, |
|
| 1247 | - $dest_coord |
|
| 1248 | - ); |
|
| 1249 | - |
|
| 1250 | - return ''; |
|
| 1251 | - } |
|
| 1252 | - |
|
| 1253 | - /* two figures which may cause ambiguity */ |
|
| 1254 | - |
|
| 1255 | - $dest_pos = $this->boardCoordToIndex($dest_coord); |
|
| 1256 | - |
|
| 1257 | - if (64 == $dest_pos) { |
|
| 1258 | - return $this->move_msg(_MD_CHESS_MOVE_COORD_INVALID, $dest_coord); |
|
| 1259 | - } // "coordinate $dest_coord is invalid" |
|
| 1260 | - |
|
| 1261 | - $fig1_can_reach = $this->tileIsReachable( |
|
| 1262 | - $move[0], |
|
| 1263 | - $this->boardCoordToIndex($pos1), |
|
| 1264 | - $dest_pos |
|
| 1265 | - ); |
|
| 1266 | - |
|
| 1267 | - $fig2_can_reach = $this->tileIsReachable( |
|
| 1268 | - $move[0], |
|
| 1269 | - $this->boardCoordToIndex($pos2), |
|
| 1270 | - $dest_pos |
|
| 1271 | - ); |
|
| 1272 | - |
|
| 1273 | - if (!$fig1_can_reach && !$fig2_can_reach) { |
|
| 1274 | - return $this->move_msg(_MD_CHESS_MOVE_NEITHER_CAN_REACH, $move[0], $this->getFullFigureName($move[0]), $dest_coord); |
|
| 1275 | - } // sprintf("neither of the %s = %s can reach %s", $move[0], $this->getFullFigureName($move[0]), $dest_coord) |
|
| 1276 | - |
|
| 1277 | - elseif ($fig1_can_reach && $fig2_can_reach) { |
|
| 1278 | - /* ambiguity - check whether a hint is given */ |
|
| 1279 | - |
|
| 1280 | - if (('-' == $action && 4 == mb_strlen($move)) |
|
| 1281 | - || ('x' == $action && 5 == mb_strlen($move))) { |
|
| 1282 | - $hint = $move[1]; |
|
| 1283 | - } |
|
| 1284 | - |
|
| 1285 | - if (empty($hint)) { |
|
| 1286 | - return $this->move_msg(_MD_CHESS_MOVE_BOTH_CAN_REACH, $move[0], $this->getFullFigureName($move[0]), $dest_coord); |
|
| 1287 | - } // sprintf("both of the %s = %s can reach %s", $move[0], $this->getFullFigureName($move[0]), $dest_coord) |
|
| 1288 | - |
|
| 1289 | - $move_fig1 = 0; |
|
| 1290 | - |
|
| 1291 | - $move_fig2 = 0; |
|
| 1292 | - |
|
| 1293 | - if ($hint >= '1' && $hint <= '8') { |
|
| 1294 | - if ($pos1[1] == $hint && $pos2[1] != $hint) { |
|
| 1295 | - $move_fig1 = 1; |
|
| 1296 | - } |
|
| 1297 | - |
|
| 1298 | - if ($pos2[1] == $hint && $pos1[1] != $hint) { |
|
| 1299 | - $move_fig2 = 1; |
|
| 1300 | - } |
|
| 1301 | - } else { |
|
| 1302 | - if ($pos1[0] == $hint && $pos2[0] != $hint) { |
|
| 1303 | - $move_fig1 = 1; |
|
| 1304 | - } |
|
| 1305 | - |
|
| 1306 | - if ($pos2[0] == $hint && $pos1[0] != $hint) { |
|
| 1307 | - $move_fig2 = 1; |
|
| 1308 | - } |
|
| 1309 | - } |
|
| 1310 | - |
|
| 1311 | - if (!$move_fig1 && !$move_fig2) { |
|
| 1312 | - return _MD_CHESS_MOVE_AMBIGUOUS; |
|
| 1313 | - } // "ambiguity is not properly resolved" |
|
| 1314 | - |
|
| 1315 | - if ($move_fig1) { |
|
| 1316 | - $this->ac_move = \sprintf( |
|
| 1317 | - '%s%s%s%s', |
|
| 1318 | - $move[0], |
|
| 1319 | - $pos1, |
|
| 1320 | - $action, |
|
| 1321 | - $dest_coord |
|
| 1322 | - ); |
|
| 1323 | - } else { |
|
| 1324 | - $this->ac_move = \sprintf( |
|
| 1325 | - '%s%s%s%s', |
|
| 1326 | - $move[0], |
|
| 1327 | - $pos2, |
|
| 1328 | - $action, |
|
| 1329 | - $dest_coord |
|
| 1330 | - ); |
|
| 1331 | - } |
|
| 1332 | - |
|
| 1333 | - return; |
|
| 1334 | - } |
|
| 1335 | - |
|
| 1336 | - if ($fig1_can_reach) { |
|
| 1337 | - $this->ac_move = \sprintf( |
|
| 1338 | - '%s%s%s%s', |
|
| 1339 | - $move[0], |
|
| 1340 | - $pos1, |
|
| 1341 | - $action, |
|
| 1342 | - $dest_coord |
|
| 1343 | - ); |
|
| 1344 | - } else { |
|
| 1345 | - $this->ac_move = \sprintf( |
|
| 1346 | - '%s%s%s%s', |
|
| 1347 | - $move[0], |
|
| 1348 | - $pos2, |
|
| 1349 | - $action, |
|
| 1350 | - $dest_coord |
|
| 1351 | - ); |
|
| 1352 | - } |
|
| 1353 | - |
|
| 1354 | - return ''; |
|
| 1355 | - } |
|
| 1356 | - |
|
| 1357 | - return $error; |
|
| 1358 | - } |
|
| 1359 | - |
|
| 1360 | - /** |
|
| 1361 | - * A hacky function that uses autocomplete to short |
|
| 1362 | - * a full move. if this fails there is no warning |
|
| 1363 | - * but the move is kept unchanged. |
|
| 1364 | - * |
|
| 1365 | - * @param string $player 'w' or 'b' |
|
| 1366 | - * @param string $move |
|
| 1367 | - * @return string new move |
|
| 1368 | - * |
|
| 1369 | - * @access private |
|
| 1370 | - */ |
|
| 1371 | - public function convertFullToChessNotation($player, $move) |
|
| 1372 | - { |
|
| 1373 | - $new_move = $move; |
|
| 1374 | - |
|
| 1375 | - $old_ac_move = $this->ac_move; /* backup required as autocomplete |
|
| 1196 | + $this->ac_move = \sprintf( |
|
| 1197 | + 'P%s%dx%s%d', |
|
| 1198 | + $move[0], |
|
| 1199 | + $pawn_line, |
|
| 1200 | + $move[1], |
|
| 1201 | + $dest_line |
|
| 1202 | + ); |
|
| 1203 | + |
|
| 1204 | + return ''; |
|
| 1205 | + } |
|
| 1206 | + } else { |
|
| 1207 | + /* figure move */ |
|
| 1208 | + |
|
| 1209 | + $dest_coord = \mb_substr($move, \mb_strlen($move) - 2, 2); |
|
| 1210 | + |
|
| 1211 | + $action = $move[\mb_strlen($move) - 3]; |
|
| 1212 | + |
|
| 1213 | + if ('x' != $action) { |
|
| 1214 | + $action = '-'; |
|
| 1215 | + } |
|
| 1216 | + |
|
| 1217 | + if ('w' == $player) { |
|
| 1218 | + $figures = $this->w_figures; |
|
| 1219 | + } else { |
|
| 1220 | + $figures = $this->b_figures; |
|
| 1221 | + } |
|
| 1222 | + |
|
| 1223 | + $fig_count = 0; |
|
| 1224 | + |
|
| 1225 | + foreach ($figures as $figure) { |
|
| 1226 | + if ($figure[0] == $move[0]) { |
|
| 1227 | + $fig_count++; |
|
| 1228 | + |
|
| 1229 | + if (1 == $fig_count) { |
|
| 1230 | + $pos1 = \mb_substr($figure, 1, 2); |
|
| 1231 | + } else { |
|
| 1232 | + $pos2 = \mb_substr($figure, 1, 2); |
|
| 1233 | + } |
|
| 1234 | + } |
|
| 1235 | + } |
|
| 1236 | + |
|
| 1237 | + if (0 == $fig_count) { |
|
| 1238 | + return $this->move_msg(_MD_CHESS_MOVE_NO_FIGURE, $move[0], $this->getFullFigureName($move[0])); |
|
| 1239 | + } // sprintf("there is no figure %s = %s", $move[0], $this->getFullFigureName($move[0])) |
|
| 1240 | + |
|
| 1241 | + elseif (1 == $fig_count) { |
|
| 1242 | + $this->ac_move = \sprintf( |
|
| 1243 | + '%s%s%s%s', |
|
| 1244 | + $move[0], |
|
| 1245 | + $pos1, |
|
| 1246 | + $action, |
|
| 1247 | + $dest_coord |
|
| 1248 | + ); |
|
| 1249 | + |
|
| 1250 | + return ''; |
|
| 1251 | + } |
|
| 1252 | + |
|
| 1253 | + /* two figures which may cause ambiguity */ |
|
| 1254 | + |
|
| 1255 | + $dest_pos = $this->boardCoordToIndex($dest_coord); |
|
| 1256 | + |
|
| 1257 | + if (64 == $dest_pos) { |
|
| 1258 | + return $this->move_msg(_MD_CHESS_MOVE_COORD_INVALID, $dest_coord); |
|
| 1259 | + } // "coordinate $dest_coord is invalid" |
|
| 1260 | + |
|
| 1261 | + $fig1_can_reach = $this->tileIsReachable( |
|
| 1262 | + $move[0], |
|
| 1263 | + $this->boardCoordToIndex($pos1), |
|
| 1264 | + $dest_pos |
|
| 1265 | + ); |
|
| 1266 | + |
|
| 1267 | + $fig2_can_reach = $this->tileIsReachable( |
|
| 1268 | + $move[0], |
|
| 1269 | + $this->boardCoordToIndex($pos2), |
|
| 1270 | + $dest_pos |
|
| 1271 | + ); |
|
| 1272 | + |
|
| 1273 | + if (!$fig1_can_reach && !$fig2_can_reach) { |
|
| 1274 | + return $this->move_msg(_MD_CHESS_MOVE_NEITHER_CAN_REACH, $move[0], $this->getFullFigureName($move[0]), $dest_coord); |
|
| 1275 | + } // sprintf("neither of the %s = %s can reach %s", $move[0], $this->getFullFigureName($move[0]), $dest_coord) |
|
| 1276 | + |
|
| 1277 | + elseif ($fig1_can_reach && $fig2_can_reach) { |
|
| 1278 | + /* ambiguity - check whether a hint is given */ |
|
| 1279 | + |
|
| 1280 | + if (('-' == $action && 4 == mb_strlen($move)) |
|
| 1281 | + || ('x' == $action && 5 == mb_strlen($move))) { |
|
| 1282 | + $hint = $move[1]; |
|
| 1283 | + } |
|
| 1284 | + |
|
| 1285 | + if (empty($hint)) { |
|
| 1286 | + return $this->move_msg(_MD_CHESS_MOVE_BOTH_CAN_REACH, $move[0], $this->getFullFigureName($move[0]), $dest_coord); |
|
| 1287 | + } // sprintf("both of the %s = %s can reach %s", $move[0], $this->getFullFigureName($move[0]), $dest_coord) |
|
| 1288 | + |
|
| 1289 | + $move_fig1 = 0; |
|
| 1290 | + |
|
| 1291 | + $move_fig2 = 0; |
|
| 1292 | + |
|
| 1293 | + if ($hint >= '1' && $hint <= '8') { |
|
| 1294 | + if ($pos1[1] == $hint && $pos2[1] != $hint) { |
|
| 1295 | + $move_fig1 = 1; |
|
| 1296 | + } |
|
| 1297 | + |
|
| 1298 | + if ($pos2[1] == $hint && $pos1[1] != $hint) { |
|
| 1299 | + $move_fig2 = 1; |
|
| 1300 | + } |
|
| 1301 | + } else { |
|
| 1302 | + if ($pos1[0] == $hint && $pos2[0] != $hint) { |
|
| 1303 | + $move_fig1 = 1; |
|
| 1304 | + } |
|
| 1305 | + |
|
| 1306 | + if ($pos2[0] == $hint && $pos1[0] != $hint) { |
|
| 1307 | + $move_fig2 = 1; |
|
| 1308 | + } |
|
| 1309 | + } |
|
| 1310 | + |
|
| 1311 | + if (!$move_fig1 && !$move_fig2) { |
|
| 1312 | + return _MD_CHESS_MOVE_AMBIGUOUS; |
|
| 1313 | + } // "ambiguity is not properly resolved" |
|
| 1314 | + |
|
| 1315 | + if ($move_fig1) { |
|
| 1316 | + $this->ac_move = \sprintf( |
|
| 1317 | + '%s%s%s%s', |
|
| 1318 | + $move[0], |
|
| 1319 | + $pos1, |
|
| 1320 | + $action, |
|
| 1321 | + $dest_coord |
|
| 1322 | + ); |
|
| 1323 | + } else { |
|
| 1324 | + $this->ac_move = \sprintf( |
|
| 1325 | + '%s%s%s%s', |
|
| 1326 | + $move[0], |
|
| 1327 | + $pos2, |
|
| 1328 | + $action, |
|
| 1329 | + $dest_coord |
|
| 1330 | + ); |
|
| 1331 | + } |
|
| 1332 | + |
|
| 1333 | + return; |
|
| 1334 | + } |
|
| 1335 | + |
|
| 1336 | + if ($fig1_can_reach) { |
|
| 1337 | + $this->ac_move = \sprintf( |
|
| 1338 | + '%s%s%s%s', |
|
| 1339 | + $move[0], |
|
| 1340 | + $pos1, |
|
| 1341 | + $action, |
|
| 1342 | + $dest_coord |
|
| 1343 | + ); |
|
| 1344 | + } else { |
|
| 1345 | + $this->ac_move = \sprintf( |
|
| 1346 | + '%s%s%s%s', |
|
| 1347 | + $move[0], |
|
| 1348 | + $pos2, |
|
| 1349 | + $action, |
|
| 1350 | + $dest_coord |
|
| 1351 | + ); |
|
| 1352 | + } |
|
| 1353 | + |
|
| 1354 | + return ''; |
|
| 1355 | + } |
|
| 1356 | + |
|
| 1357 | + return $error; |
|
| 1358 | + } |
|
| 1359 | + |
|
| 1360 | + /** |
|
| 1361 | + * A hacky function that uses autocomplete to short |
|
| 1362 | + * a full move. if this fails there is no warning |
|
| 1363 | + * but the move is kept unchanged. |
|
| 1364 | + * |
|
| 1365 | + * @param string $player 'w' or 'b' |
|
| 1366 | + * @param string $move |
|
| 1367 | + * @return string new move |
|
| 1368 | + * |
|
| 1369 | + * @access private |
|
| 1370 | + */ |
|
| 1371 | + public function convertFullToChessNotation($player, $move) |
|
| 1372 | + { |
|
| 1373 | + $new_move = $move; |
|
| 1374 | + |
|
| 1375 | + $old_ac_move = $this->ac_move; /* backup required as autocomplete |
|
| 1376 | 1376 | will overwrite it */ |
| 1377 | 1377 | |
| 1378 | - /* valid pawn moves are always non-ambigious */ |
|
| 1378 | + /* valid pawn moves are always non-ambigious */ |
|
| 1379 | 1379 | |
| 1380 | - if (0 === \strpos($move, 'P')) { |
|
| 1381 | - /* skip P anycase. for attacks skip source digit |
|
| 1380 | + if (0 === \strpos($move, 'P')) { |
|
| 1381 | + /* skip P anycase. for attacks skip source digit |
|
| 1382 | 1382 | and for moves skip source pos and - */ |
| 1383 | 1383 | |
| 1384 | - if ('-' == $move[3]) { |
|
| 1385 | - $new_move = \mb_substr($move, 4); |
|
| 1386 | - } elseif ('x' == $move[3]) { |
|
| 1387 | - $new_move = \sprintf('%s%s', $move[1], \mb_substr($move, 3)); |
|
| 1388 | - } |
|
| 1389 | - } else { |
|
| 1390 | - /* try to remove the source position and check whether it |
|
| 1384 | + if ('-' == $move[3]) { |
|
| 1385 | + $new_move = \mb_substr($move, 4); |
|
| 1386 | + } elseif ('x' == $move[3]) { |
|
| 1387 | + $new_move = \sprintf('%s%s', $move[1], \mb_substr($move, 3)); |
|
| 1388 | + } |
|
| 1389 | + } else { |
|
| 1390 | + /* try to remove the source position and check whether it |
|
| 1391 | 1391 | * is a non-ambigious move. if it is add one of the components |
| 1392 | 1392 | * and check again */ |
| 1393 | 1393 | |
| 1394 | - if ('-' == $move[3]) { |
|
| 1395 | - $dest = \mb_substr($move, 4); |
|
| 1396 | - } elseif ('x' == $move[3]) { |
|
| 1397 | - $dest = \mb_substr($move, 3); |
|
| 1398 | - } |
|
| 1394 | + if ('-' == $move[3]) { |
|
| 1395 | + $dest = \mb_substr($move, 4); |
|
| 1396 | + } elseif ('x' == $move[3]) { |
|
| 1397 | + $dest = \mb_substr($move, 3); |
|
| 1398 | + } |
|
| 1399 | 1399 | |
| 1400 | - $new_move = \sprintf('%s%s', $move[0], $dest); |
|
| 1400 | + $new_move = \sprintf('%s%s', $move[0], $dest); |
|
| 1401 | 1401 | |
| 1402 | - if ('' != $this->completeMove($player, $new_move)) { |
|
| 1403 | - /* add a component */ |
|
| 1402 | + if ('' != $this->completeMove($player, $new_move)) { |
|
| 1403 | + /* add a component */ |
|
| 1404 | 1404 | |
| 1405 | - $new_move = \sprintf('%s%s%s', $move[0], $move[1], $dest); |
|
| 1405 | + $new_move = \sprintf('%s%s%s', $move[0], $move[1], $dest); |
|
| 1406 | 1406 | |
| 1407 | - if ('' != $this->completeMove($player, $new_move)) { |
|
| 1408 | - /* add other component */ |
|
| 1407 | + if ('' != $this->completeMove($player, $new_move)) { |
|
| 1408 | + /* add other component */ |
|
| 1409 | 1409 | |
| 1410 | - $new_move = \sprintf('%s%s%s', $move[0], $move[2], $dest); |
|
| 1410 | + $new_move = \sprintf('%s%s%s', $move[0], $move[2], $dest); |
|
| 1411 | 1411 | |
| 1412 | - if ('' != $this->completeMove($player, $new_move)) { |
|
| 1413 | - $new_move = $move; |
|
| 1414 | - } /* give up */ |
|
| 1415 | - } |
|
| 1416 | - } |
|
| 1417 | - } |
|
| 1412 | + if ('' != $this->completeMove($player, $new_move)) { |
|
| 1413 | + $new_move = $move; |
|
| 1414 | + } /* give up */ |
|
| 1415 | + } |
|
| 1416 | + } |
|
| 1417 | + } |
|
| 1418 | 1418 | |
| 1419 | - $this->ac_move = $old_ac_move; |
|
| 1419 | + $this->ac_move = $old_ac_move; |
|
| 1420 | 1420 | |
| 1421 | - return $new_move; |
|
| 1422 | - } |
|
| 1421 | + return $new_move; |
|
| 1422 | + } |
|
| 1423 | 1423 | |
| 1424 | - /** |
|
| 1425 | - * Handle a move. |
|
| 1426 | - * |
|
| 1427 | - * check whether it is user's turn and the move is valid. |
|
| 1428 | - * if the move is okay update the game file. |
|
| 1429 | - * |
|
| 1430 | - * @param string $move |
|
| 1431 | - * @return array A two-element array: |
|
| 1432 | - * - $move_performed: true if the move was performed and the game state has been updated, false otherwise |
|
| 1433 | - * - $move_result_text: text message |
|
| 1434 | - * |
|
| 1435 | - * @access private |
|
| 1436 | - */ |
|
| 1437 | - public function handleMove($move) |
|
| 1438 | - { |
|
| 1439 | - /* DEBUG: echo "HANDLE: $move, $comment<br>"; */ |
|
| 1424 | + /** |
|
| 1425 | + * Handle a move. |
|
| 1426 | + * |
|
| 1427 | + * check whether it is user's turn and the move is valid. |
|
| 1428 | + * if the move is okay update the game file. |
|
| 1429 | + * |
|
| 1430 | + * @param string $move |
|
| 1431 | + * @return array A two-element array: |
|
| 1432 | + * - $move_performed: true if the move was performed and the game state has been updated, false otherwise |
|
| 1433 | + * - $move_result_text: text message |
|
| 1434 | + * |
|
| 1435 | + * @access private |
|
| 1436 | + */ |
|
| 1437 | + public function handleMove($move) |
|
| 1438 | + { |
|
| 1439 | + /* DEBUG: echo "HANDLE: $move, $comment<br>"; */ |
|
| 1440 | 1440 | |
| 1441 | - $result = _MD_CHESS_MOVE_UNDEFINED; |
|
| 1441 | + $result = _MD_CHESS_MOVE_UNDEFINED; |
|
| 1442 | 1442 | |
| 1443 | - $move_handled = 0; |
|
| 1443 | + $move_handled = 0; |
|
| 1444 | 1444 | |
| 1445 | - // Use $this->gamestate['fen_piece_placement'] to initialize $this->board, $this->w_figures and $this->b_figures. |
|
| 1445 | + // Use $this->gamestate['fen_piece_placement'] to initialize $this->board, $this->w_figures and $this->b_figures. |
|
| 1446 | 1446 | |
| 1447 | - $this->fen_piece_placement_to_board() || \trigger_error('handleMove, piece_placement invalid', \E_USER_ERROR); |
|
| 1447 | + $this->fen_piece_placement_to_board() || \trigger_error('handleMove, piece_placement invalid', \E_USER_ERROR); |
|
| 1448 | 1448 | |
| 1449 | - // get color of current player |
|
| 1449 | + // get color of current player |
|
| 1450 | 1450 | |
| 1451 | - $cur_player = $this->gamestate['fen_active_color']; /* b or w */ |
|
| 1451 | + $cur_player = $this->gamestate['fen_active_color']; /* b or w */ |
|
| 1452 | 1452 | |
| 1453 | - if ('w' != $cur_player && 'b' != $cur_player) { |
|
| 1454 | - return [false, "handleMove, internal error: player='$cur_player'"]; |
|
| 1455 | - } |
|
| 1453 | + if ('w' != $cur_player && 'b' != $cur_player) { |
|
| 1454 | + return [false, "handleMove, internal error: player='$cur_player'"]; |
|
| 1455 | + } |
|
| 1456 | 1456 | |
| 1457 | - $cur_opp = 'w' == $cur_player ? 'b' : 'w'; |
|
| 1457 | + $cur_opp = 'w' == $cur_player ? 'b' : 'w'; |
|
| 1458 | 1458 | |
| 1459 | - if ('*' != $this->gamestate['pgn_result']) { |
|
| 1460 | - return [false, _MD_CHESS_MOVE_GAME_OVER]; |
|
| 1461 | - } |
|
| 1459 | + if ('*' != $this->gamestate['pgn_result']) { |
|
| 1460 | + return [false, _MD_CHESS_MOVE_GAME_OVER]; |
|
| 1461 | + } |
|
| 1462 | 1462 | |
| 1463 | - // get castling availability flags |
|
| 1463 | + // get castling availability flags |
|
| 1464 | 1464 | |
| 1465 | - $white_may_castle_short = \mb_strstr($this->gamestate['fen_castling_availability'], 'K') ? true : false; |
|
| 1465 | + $white_may_castle_short = \mb_strstr($this->gamestate['fen_castling_availability'], 'K') ? true : false; |
|
| 1466 | 1466 | |
| 1467 | - $white_may_castle_long = \mb_strstr($this->gamestate['fen_castling_availability'], 'Q') ? true : false; |
|
| 1467 | + $white_may_castle_long = \mb_strstr($this->gamestate['fen_castling_availability'], 'Q') ? true : false; |
|
| 1468 | 1468 | |
| 1469 | - $black_may_castle_short = \mb_strstr($this->gamestate['fen_castling_availability'], 'k') ? true : false; |
|
| 1469 | + $black_may_castle_short = \mb_strstr($this->gamestate['fen_castling_availability'], 'k') ? true : false; |
|
| 1470 | 1470 | |
| 1471 | - $black_may_castle_long = \mb_strstr($this->gamestate['fen_castling_availability'], 'q') ? true : false; |
|
| 1471 | + $black_may_castle_long = \mb_strstr($this->gamestate['fen_castling_availability'], 'q') ? true : false; |
|
| 1472 | 1472 | |
| 1473 | - // Castling is supposed to use ohs, not zeros. Allow zeros on input anyway. |
|
| 1473 | + // Castling is supposed to use ohs, not zeros. Allow zeros on input anyway. |
|
| 1474 | 1474 | |
| 1475 | - if ('0-0' == $move) { |
|
| 1476 | - $move = 'O-O'; |
|
| 1477 | - } elseif ('0-0-0' == $move) { |
|
| 1478 | - $move = 'O-O-O'; |
|
| 1479 | - } |
|
| 1475 | + if ('0-0' == $move) { |
|
| 1476 | + $move = 'O-O'; |
|
| 1477 | + } elseif ('0-0-0' == $move) { |
|
| 1478 | + $move = 'O-O-O'; |
|
| 1479 | + } |
|
| 1480 | 1480 | |
| 1481 | - // allow two-step of king to indicate castling |
|
| 1481 | + // allow two-step of king to indicate castling |
|
| 1482 | 1482 | |
| 1483 | - if ('w' == $cur_player && 'Ke1-g1' == $move) { |
|
| 1484 | - $move = 'O-O'; |
|
| 1485 | - } elseif ('w' == $cur_player && 'Ke1-c1' == $move) { |
|
| 1486 | - $move = 'O-O-O'; |
|
| 1487 | - } elseif ('b' == $cur_player && 'Ke8-g8' == $move) { |
|
| 1488 | - $move = 'O-O'; |
|
| 1489 | - } elseif ('b' == $cur_player && 'Ke8-c8' == $move) { |
|
| 1490 | - $move = 'O-O-O'; |
|
| 1491 | - } |
|
| 1483 | + if ('w' == $cur_player && 'Ke1-g1' == $move) { |
|
| 1484 | + $move = 'O-O'; |
|
| 1485 | + } elseif ('w' == $cur_player && 'Ke1-c1' == $move) { |
|
| 1486 | + $move = 'O-O-O'; |
|
| 1487 | + } elseif ('b' == $cur_player && 'Ke8-g8' == $move) { |
|
| 1488 | + $move = 'O-O'; |
|
| 1489 | + } elseif ('b' == $cur_player && 'Ke8-c8' == $move) { |
|
| 1490 | + $move = 'O-O-O'; |
|
| 1491 | + } |
|
| 1492 | 1492 | |
| 1493 | - /* backup full move input for game history before |
|
| 1493 | + /* backup full move input for game history before |
|
| 1494 | 1494 | * splitting figure type apart */ |
| 1495 | 1495 | |
| 1496 | - $history_move = $move; |
|
| 1496 | + $history_move = $move; |
|
| 1497 | 1497 | |
| 1498 | - /* clear last move - won't be saved yet if anything |
|
| 1498 | + /* clear last move - won't be saved yet if anything |
|
| 1499 | 1499 | goes wrong */ |
| 1500 | 1500 | |
| 1501 | - $this->last_move = 'x'; |
|
| 1501 | + $this->last_move = 'x'; |
|
| 1502 | 1502 | |
| 1503 | - $this->piece_captured = 'x'; |
|
| 1503 | + $this->piece_captured = 'x'; |
|
| 1504 | 1504 | |
| 1505 | - /* HANDLE MOVES: |
|
| 1505 | + /* HANDLE MOVES: |
|
| 1506 | 1506 | * --- surrender |
| 1507 | 1507 | * O-O short castling |
| 1508 | 1508 | * O-O-O long castling |
| 1509 | 1509 | * [PRNBQK][a-h][1-8][-:x][a-h][1-8] unshortened move |
| 1510 | 1510 | */ |
| 1511 | 1511 | |
| 1512 | - if ('O-O' == $move) { |
|
| 1513 | - /* short castling */ |
|
| 1512 | + if ('O-O' == $move) { |
|
| 1513 | + /* short castling */ |
|
| 1514 | 1514 | |
| 1515 | - if ('b' == $cur_player) { |
|
| 1516 | - if (!$black_may_castle_short) { |
|
| 1517 | - return [false, _MD_CHESS_MOVE_NO_CASTLE]; // You cannot castle short any longer! |
|
| 1518 | - } |
|
| 1515 | + if ('b' == $cur_player) { |
|
| 1516 | + if (!$black_may_castle_short) { |
|
| 1517 | + return [false, _MD_CHESS_MOVE_NO_CASTLE]; // You cannot castle short any longer! |
|
| 1518 | + } |
|
| 1519 | 1519 | |
| 1520 | - if (!$this->is_empty_tile(61) || !$this->is_empty_tile(62)) { |
|
| 1521 | - return [false, _MD_CHESS_MOVE_NO_CASTLE]; // Cannot castle short because the way is blocked! |
|
| 1522 | - } |
|
| 1520 | + if (!$this->is_empty_tile(61) || !$this->is_empty_tile(62)) { |
|
| 1521 | + return [false, _MD_CHESS_MOVE_NO_CASTLE]; // Cannot castle short because the way is blocked! |
|
| 1522 | + } |
|
| 1523 | 1523 | |
| 1524 | - if ($this->kingIsUnderAttack('b', 'w')) { |
|
| 1525 | - return [false, _MD_CHESS_MOVE_NO_CASTLE]; // You cannot escape check by castling! |
|
| 1526 | - } |
|
| 1524 | + if ($this->kingIsUnderAttack('b', 'w')) { |
|
| 1525 | + return [false, _MD_CHESS_MOVE_NO_CASTLE]; // You cannot escape check by castling! |
|
| 1526 | + } |
|
| 1527 | 1527 | |
| 1528 | - if ($this->tileIsUnderAttack('w', 62) || $this->tileIsUnderAttack('w', 61)) { |
|
| 1529 | - return [false, _MD_CHESS_MOVE_NO_CASTLE]; // A tile the king passes over or into would be under attack after short castling! |
|
| 1530 | - } |
|
| 1528 | + if ($this->tileIsUnderAttack('w', 62) || $this->tileIsUnderAttack('w', 61)) { |
|
| 1529 | + return [false, _MD_CHESS_MOVE_NO_CASTLE]; // A tile the king passes over or into would be under attack after short castling! |
|
| 1530 | + } |
|
| 1531 | 1531 | |
| 1532 | - $this->clear_tile(60); |
|
| 1532 | + $this->clear_tile(60); |
|
| 1533 | 1533 | |
| 1534 | - $this->board[62] = 'bK'; |
|
| 1534 | + $this->board[62] = 'bK'; |
|
| 1535 | 1535 | |
| 1536 | - $this->board[61] = 'bR'; |
|
| 1536 | + $this->board[61] = 'bR'; |
|
| 1537 | 1537 | |
| 1538 | - $this->clear_tile(63); |
|
| 1538 | + $this->clear_tile(63); |
|
| 1539 | 1539 | |
| 1540 | - $black_may_castle_short = false; |
|
| 1540 | + $black_may_castle_short = false; |
|
| 1541 | 1541 | |
| 1542 | - $black_may_castle_long = false; |
|
| 1543 | - } else { |
|
| 1544 | - if (!$white_may_castle_short) { |
|
| 1545 | - return [false, _MD_CHESS_MOVE_NO_CASTLE]; // You cannot castle short any longer! |
|
| 1546 | - } |
|
| 1542 | + $black_may_castle_long = false; |
|
| 1543 | + } else { |
|
| 1544 | + if (!$white_may_castle_short) { |
|
| 1545 | + return [false, _MD_CHESS_MOVE_NO_CASTLE]; // You cannot castle short any longer! |
|
| 1546 | + } |
|
| 1547 | 1547 | |
| 1548 | - if (!$this->is_empty_tile(5) || !$this->is_empty_tile(6)) { |
|
| 1549 | - return [false, _MD_CHESS_MOVE_NO_CASTLE]; // Cannot castle short because the way is blocked! |
|
| 1550 | - } |
|
| 1548 | + if (!$this->is_empty_tile(5) || !$this->is_empty_tile(6)) { |
|
| 1549 | + return [false, _MD_CHESS_MOVE_NO_CASTLE]; // Cannot castle short because the way is blocked! |
|
| 1550 | + } |
|
| 1551 | 1551 | |
| 1552 | - if ($this->kingIsUnderAttack('w', 'b')) { |
|
| 1553 | - return [false, _MD_CHESS_MOVE_NO_CASTLE]; // You cannot escape check by castling! |
|
| 1554 | - } |
|
| 1552 | + if ($this->kingIsUnderAttack('w', 'b')) { |
|
| 1553 | + return [false, _MD_CHESS_MOVE_NO_CASTLE]; // You cannot escape check by castling! |
|
| 1554 | + } |
|
| 1555 | 1555 | |
| 1556 | - if ($this->tileIsUnderAttack('b', 5) || $this->tileIsUnderAttack('b', 6)) { |
|
| 1557 | - return [false, _MD_CHESS_MOVE_NO_CASTLE]; // A tile the king passes over or into would be under attack after short castling! |
|
| 1558 | - } |
|
| 1556 | + if ($this->tileIsUnderAttack('b', 5) || $this->tileIsUnderAttack('b', 6)) { |
|
| 1557 | + return [false, _MD_CHESS_MOVE_NO_CASTLE]; // A tile the king passes over or into would be under attack after short castling! |
|
| 1558 | + } |
|
| 1559 | 1559 | |
| 1560 | - $this->clear_tile(4); |
|
| 1560 | + $this->clear_tile(4); |
|
| 1561 | 1561 | |
| 1562 | - $this->board[6] = 'wK'; |
|
| 1562 | + $this->board[6] = 'wK'; |
|
| 1563 | 1563 | |
| 1564 | - $this->board[5] = 'wR'; |
|
| 1564 | + $this->board[5] = 'wR'; |
|
| 1565 | 1565 | |
| 1566 | - $this->clear_tile(7); |
|
| 1566 | + $this->clear_tile(7); |
|
| 1567 | 1567 | |
| 1568 | - $white_may_castle_short = false; |
|
| 1568 | + $white_may_castle_short = false; |
|
| 1569 | 1569 | |
| 1570 | - $white_may_castle_long = false; |
|
| 1571 | - } |
|
| 1570 | + $white_may_castle_long = false; |
|
| 1571 | + } |
|
| 1572 | 1572 | |
| 1573 | - $result = _MD_CHESS_MOVE_CASTLED_SHORT; |
|
| 1573 | + $result = _MD_CHESS_MOVE_CASTLED_SHORT; |
|
| 1574 | 1574 | |
| 1575 | - $move_handled = 1; |
|
| 1575 | + $move_handled = 1; |
|
| 1576 | 1576 | |
| 1577 | - $this->last_move = 'O-O'; |
|
| 1578 | - } elseif ('O-O-O' == $move) { |
|
| 1579 | - /* long castling */ |
|
| 1577 | + $this->last_move = 'O-O'; |
|
| 1578 | + } elseif ('O-O-O' == $move) { |
|
| 1579 | + /* long castling */ |
|
| 1580 | 1580 | |
| 1581 | - if ('b' == $cur_player) { |
|
| 1582 | - if (!$black_may_castle_long) { |
|
| 1583 | - return [false, _MD_CHESS_MOVE_NO_CASTLE]; // You cannot castle long any longer! |
|
| 1584 | - } |
|
| 1581 | + if ('b' == $cur_player) { |
|
| 1582 | + if (!$black_may_castle_long) { |
|
| 1583 | + return [false, _MD_CHESS_MOVE_NO_CASTLE]; // You cannot castle long any longer! |
|
| 1584 | + } |
|
| 1585 | 1585 | |
| 1586 | - if (!$this->is_empty_tile(57) || !$this->is_empty_tile(58) || !$this->is_empty_tile(59)) { |
|
| 1587 | - return [false, _MD_CHESS_MOVE_NO_CASTLE]; // Cannot castle long because the way is blocked! |
|
| 1588 | - } |
|
| 1586 | + if (!$this->is_empty_tile(57) || !$this->is_empty_tile(58) || !$this->is_empty_tile(59)) { |
|
| 1587 | + return [false, _MD_CHESS_MOVE_NO_CASTLE]; // Cannot castle long because the way is blocked! |
|
| 1588 | + } |
|
| 1589 | 1589 | |
| 1590 | - if ($this->kingIsUnderAttack('b', 'w')) { |
|
| 1591 | - return [false, _MD_CHESS_MOVE_NO_CASTLE]; // You cannot escape check by castling! |
|
| 1592 | - } |
|
| 1590 | + if ($this->kingIsUnderAttack('b', 'w')) { |
|
| 1591 | + return [false, _MD_CHESS_MOVE_NO_CASTLE]; // You cannot escape check by castling! |
|
| 1592 | + } |
|
| 1593 | 1593 | |
| 1594 | - if ($this->tileIsUnderAttack('w', 58) || $this->tileIsUnderAttack('w', 59)) { |
|
| 1595 | - return [false, _MD_CHESS_MOVE_NO_CASTLE]; // A tile the king passes over or into would be under attack after short castling! |
|
| 1596 | - } |
|
| 1594 | + if ($this->tileIsUnderAttack('w', 58) || $this->tileIsUnderAttack('w', 59)) { |
|
| 1595 | + return [false, _MD_CHESS_MOVE_NO_CASTLE]; // A tile the king passes over or into would be under attack after short castling! |
|
| 1596 | + } |
|
| 1597 | 1597 | |
| 1598 | - $this->clear_tile(56); |
|
| 1598 | + $this->clear_tile(56); |
|
| 1599 | 1599 | |
| 1600 | - $this->board[58] = 'bK'; |
|
| 1600 | + $this->board[58] = 'bK'; |
|
| 1601 | 1601 | |
| 1602 | - $this->board[59] = 'bR'; |
|
| 1602 | + $this->board[59] = 'bR'; |
|
| 1603 | 1603 | |
| 1604 | - $this->clear_tile(60); |
|
| 1604 | + $this->clear_tile(60); |
|
| 1605 | 1605 | |
| 1606 | - $black_may_castle_short = false; |
|
| 1606 | + $black_may_castle_short = false; |
|
| 1607 | 1607 | |
| 1608 | - $black_may_castle_long = false; |
|
| 1609 | - } else { |
|
| 1610 | - if (!$white_may_castle_long) { |
|
| 1611 | - return [false, _MD_CHESS_MOVE_NO_CASTLE]; // You cannot castle long any longer! |
|
| 1612 | - } |
|
| 1608 | + $black_may_castle_long = false; |
|
| 1609 | + } else { |
|
| 1610 | + if (!$white_may_castle_long) { |
|
| 1611 | + return [false, _MD_CHESS_MOVE_NO_CASTLE]; // You cannot castle long any longer! |
|
| 1612 | + } |
|
| 1613 | 1613 | |
| 1614 | - if (!$this->is_empty_tile(1) || !$this->is_empty_tile(2) || !$this->is_empty_tile(3)) { |
|
| 1615 | - return [false, _MD_CHESS_MOVE_NO_CASTLE]; // Cannot castle long because the way is blocked! |
|
| 1616 | - } |
|
| 1614 | + if (!$this->is_empty_tile(1) || !$this->is_empty_tile(2) || !$this->is_empty_tile(3)) { |
|
| 1615 | + return [false, _MD_CHESS_MOVE_NO_CASTLE]; // Cannot castle long because the way is blocked! |
|
| 1616 | + } |
|
| 1617 | 1617 | |
| 1618 | - if ($this->kingIsUnderAttack('w', 'b')) { |
|
| 1619 | - return [false, _MD_CHESS_MOVE_NO_CASTLE]; // You cannot escape check by castling! |
|
| 1620 | - } |
|
| 1618 | + if ($this->kingIsUnderAttack('w', 'b')) { |
|
| 1619 | + return [false, _MD_CHESS_MOVE_NO_CASTLE]; // You cannot escape check by castling! |
|
| 1620 | + } |
|
| 1621 | 1621 | |
| 1622 | - if ($this->tileIsUnderAttack('b', 2) || $this->tileIsUnderAttack('b', 3)) { |
|
| 1623 | - return [false, _MD_CHESS_MOVE_NO_CASTLE]; // A tile the king passes over or into would be under attack after short castling! |
|
| 1624 | - } |
|
| 1622 | + if ($this->tileIsUnderAttack('b', 2) || $this->tileIsUnderAttack('b', 3)) { |
|
| 1623 | + return [false, _MD_CHESS_MOVE_NO_CASTLE]; // A tile the king passes over or into would be under attack after short castling! |
|
| 1624 | + } |
|
| 1625 | 1625 | |
| 1626 | - $this->clear_tile(0); |
|
| 1626 | + $this->clear_tile(0); |
|
| 1627 | 1627 | |
| 1628 | - $this->board[2] = 'wK'; |
|
| 1628 | + $this->board[2] = 'wK'; |
|
| 1629 | 1629 | |
| 1630 | - $this->board[3] = 'wR'; |
|
| 1630 | + $this->board[3] = 'wR'; |
|
| 1631 | 1631 | |
| 1632 | - $this->clear_tile(4); |
|
| 1632 | + $this->clear_tile(4); |
|
| 1633 | 1633 | |
| 1634 | - $white_may_castle_short = false; |
|
| 1634 | + $white_may_castle_short = false; |
|
| 1635 | 1635 | |
| 1636 | - $white_may_castle_long = false; |
|
| 1637 | - } |
|
| 1636 | + $white_may_castle_long = false; |
|
| 1637 | + } |
|
| 1638 | 1638 | |
| 1639 | - $result = _MD_CHESS_MOVE_CASTLED_LONG; |
|
| 1639 | + $result = _MD_CHESS_MOVE_CASTLED_LONG; |
|
| 1640 | 1640 | |
| 1641 | - $move_handled = 1; |
|
| 1641 | + $move_handled = 1; |
|
| 1642 | 1642 | |
| 1643 | - $this->last_move = 'O-O-O'; |
|
| 1644 | - } else { |
|
| 1645 | - /* [PRNBQK][a-h][1-8][-:x][a-h][1-8][RNBQK] full move */ |
|
| 1643 | + $this->last_move = 'O-O-O'; |
|
| 1644 | + } else { |
|
| 1645 | + /* [PRNBQK][a-h][1-8][-:x][a-h][1-8][RNBQK] full move */ |
|
| 1646 | 1646 | |
| 1647 | - /* allow short move description by autocompleting to |
|
| 1647 | + /* allow short move description by autocompleting to |
|
| 1648 | 1648 | * full description */ |
| 1649 | 1649 | |
| 1650 | - $ac_error = $this->completeMove($cur_player, \trim($move)); |
|
| 1650 | + $ac_error = $this->completeMove($cur_player, \trim($move)); |
|
| 1651 | 1651 | |
| 1652 | - if ('' != $ac_error) { |
|
| 1653 | - return [false, $ac_error]; |
|
| 1654 | - } // "ERROR: autocomplete: $ac_error" |
|
| 1652 | + if ('' != $ac_error) { |
|
| 1653 | + return [false, $ac_error]; |
|
| 1654 | + } // "ERROR: autocomplete: $ac_error" |
|
| 1655 | 1655 | |
| 1656 | - $move = $this->ac_move; |
|
| 1656 | + $move = $this->ac_move; |
|
| 1657 | 1657 | |
| 1658 | - $this->last_move = \str_replace('?', '', $move); |
|
| 1658 | + $this->last_move = \str_replace('?', '', $move); |
|
| 1659 | 1659 | |
| 1660 | - /* a final captial letter may only be N,B,R,Q for the |
|
| 1660 | + /* a final captial letter may only be N,B,R,Q for the |
|
| 1661 | 1661 | * appropiate chessman */ |
| 1662 | 1662 | |
| 1663 | - $c = $move[\mb_strlen($move) - 1]; |
|
| 1663 | + $c = $move[\mb_strlen($move) - 1]; |
|
| 1664 | 1664 | |
| 1665 | - if ($c >= 'A' && $c <= 'Z') { |
|
| 1666 | - if ('N' != $c && 'B' != $c && 'R' != $c && 'Q' != $c) { |
|
| 1667 | - return [false, _MD_CHESS_MOVE_INVALID_PIECE]; |
|
| 1668 | - } |
|
| 1669 | - } // "ERROR: only N (knight), B (bishop), R (rook) and Q (queen) are valid chessman identifiers" |
|
| 1665 | + if ($c >= 'A' && $c <= 'Z') { |
|
| 1666 | + if ('N' != $c && 'B' != $c && 'R' != $c && 'Q' != $c) { |
|
| 1667 | + return [false, _MD_CHESS_MOVE_INVALID_PIECE]; |
|
| 1668 | + } |
|
| 1669 | + } // "ERROR: only N (knight), B (bishop), R (rook) and Q (queen) are valid chessman identifiers" |
|
| 1670 | 1670 | |
| 1671 | - /* if it is a full move, try to shorten the history move */ |
|
| 1671 | + /* if it is a full move, try to shorten the history move */ |
|
| 1672 | 1672 | |
| 1673 | - if (\mb_strlen($history_move) >= 6) { |
|
| 1674 | - $history_move = $this->convertFullToChessNotation($cur_player, $history_move); |
|
| 1675 | - } |
|
| 1673 | + if (\mb_strlen($history_move) >= 6) { |
|
| 1674 | + $history_move = $this->convertFullToChessNotation($cur_player, $history_move); |
|
| 1675 | + } |
|
| 1676 | 1676 | |
| 1677 | - /* DEBUG: echo "Move: $move ($history_move)<br>"; */ |
|
| 1677 | + /* DEBUG: echo "Move: $move ($history_move)<br>"; */ |
|
| 1678 | 1678 | |
| 1679 | - /* validate figure and position */ |
|
| 1679 | + /* validate figure and position */ |
|
| 1680 | 1680 | |
| 1681 | - $fig_type = $move[0]; |
|
| 1681 | + $fig_type = $move[0]; |
|
| 1682 | 1682 | |
| 1683 | - $fig_name = $this->getFullFigureName($fig_type); |
|
| 1683 | + $fig_name = $this->getFullFigureName($fig_type); |
|
| 1684 | 1684 | |
| 1685 | - if ('empty' == $fig_name) { |
|
| 1686 | - return [false, $this->move_msg(_MD_CHESS_MOVE_UNKNOWN_FIGURE, $fig_type)]; |
|
| 1687 | - } // "ERROR: Figure $fig_type is unknown!" |
|
| 1685 | + if ('empty' == $fig_name) { |
|
| 1686 | + return [false, $this->move_msg(_MD_CHESS_MOVE_UNKNOWN_FIGURE, $fig_type)]; |
|
| 1687 | + } // "ERROR: Figure $fig_type is unknown!" |
|
| 1688 | 1688 | |
| 1689 | - $fig_coord = \mb_substr($move, 1, 2); |
|
| 1689 | + $fig_coord = \mb_substr($move, 1, 2); |
|
| 1690 | 1690 | |
| 1691 | - $fig_pos = $this->boardCoordToIndex($fig_coord); |
|
| 1691 | + $fig_pos = $this->boardCoordToIndex($fig_coord); |
|
| 1692 | 1692 | |
| 1693 | - if (64 == $fig_pos) { |
|
| 1694 | - return [false, $this->move_msg(_MD_CHESS_MOVE_COORD_INVALID, $fig_coord)]; |
|
| 1695 | - } // "ERROR: $fig_coord is invalid!" |
|
| 1693 | + if (64 == $fig_pos) { |
|
| 1694 | + return [false, $this->move_msg(_MD_CHESS_MOVE_COORD_INVALID, $fig_coord)]; |
|
| 1695 | + } // "ERROR: $fig_coord is invalid!" |
|
| 1696 | 1696 | |
| 1697 | - /* DEBUG echo "fig_type: $fig_type, fig_pos: $fig_pos<br>"; */ |
|
| 1697 | + /* DEBUG echo "fig_type: $fig_type, fig_pos: $fig_pos<br>"; */ |
|
| 1698 | 1698 | |
| 1699 | - if ($this->is_empty_tile($fig_pos)) { |
|
| 1700 | - return [false, $this->move_msg(_MD_CHESS_MOVE_TILE_EMPTY, $fig_coord)]; |
|
| 1701 | - } // "ERROR: Tile $fig_coord is empty." |
|
| 1699 | + if ($this->is_empty_tile($fig_pos)) { |
|
| 1700 | + return [false, $this->move_msg(_MD_CHESS_MOVE_TILE_EMPTY, $fig_coord)]; |
|
| 1701 | + } // "ERROR: Tile $fig_coord is empty." |
|
| 1702 | 1702 | |
| 1703 | - if ($this->board[$fig_pos][0] != $cur_player) { |
|
| 1704 | - return [false, _MD_CHESS_MOVE_NOT_YOUR_PIECE]; |
|
| 1705 | - } // "ERROR: Figure does not belong to you!" |
|
| 1703 | + if ($this->board[$fig_pos][0] != $cur_player) { |
|
| 1704 | + return [false, _MD_CHESS_MOVE_NOT_YOUR_PIECE]; |
|
| 1705 | + } // "ERROR: Figure does not belong to you!" |
|
| 1706 | 1706 | |
| 1707 | - if ($this->board[$fig_pos][1] != $fig_type) { |
|
| 1708 | - return [false, _MD_CHESS_MOVE_NOEXIST_FIGURE]; |
|
| 1709 | - } // "ERROR: Figure does not exist!" |
|
| 1707 | + if ($this->board[$fig_pos][1] != $fig_type) { |
|
| 1708 | + return [false, _MD_CHESS_MOVE_NOEXIST_FIGURE]; |
|
| 1709 | + } // "ERROR: Figure does not exist!" |
|
| 1710 | 1710 | |
| 1711 | - /* get target index */ |
|
| 1711 | + /* get target index */ |
|
| 1712 | 1712 | |
| 1713 | - $dest_coord = \mb_substr($move, 4, 2); |
|
| 1713 | + $dest_coord = \mb_substr($move, 4, 2); |
|
| 1714 | 1714 | |
| 1715 | - $dest_pos = $this->boardCoordToIndex($dest_coord); |
|
| 1715 | + $dest_pos = $this->boardCoordToIndex($dest_coord); |
|
| 1716 | 1716 | |
| 1717 | - if (64 == $dest_pos) { |
|
| 1718 | - return [false, $this->move_msg(_MD_CHESS_MOVE_COORD_INVALID, $dest_coord)]; |
|
| 1719 | - } // "ERROR: $dest_coord is invalid!" |
|
| 1717 | + if (64 == $dest_pos) { |
|
| 1718 | + return [false, $this->move_msg(_MD_CHESS_MOVE_COORD_INVALID, $dest_coord)]; |
|
| 1719 | + } // "ERROR: $dest_coord is invalid!" |
|
| 1720 | 1720 | |
| 1721 | - if ($dest_pos == $fig_pos) { |
|
| 1722 | - return [false, _MD_CHESS_MOVE_START_END_SAME]; |
|
| 1723 | - } |
|
| 1721 | + if ($dest_pos == $fig_pos) { |
|
| 1722 | + return [false, _MD_CHESS_MOVE_START_END_SAME]; |
|
| 1723 | + } |
|
| 1724 | 1724 | |
| 1725 | - /* DEBUG echo "dest_pos: $dest_pos<br>"; */ |
|
| 1725 | + /* DEBUG echo "dest_pos: $dest_pos<br>"; */ |
|
| 1726 | 1726 | |
| 1727 | - /* get action */ |
|
| 1727 | + /* get action */ |
|
| 1728 | 1728 | |
| 1729 | - $action = $move[3]; |
|
| 1729 | + $action = $move[3]; |
|
| 1730 | 1730 | |
| 1731 | - if ('-' == $move[3]) { |
|
| 1732 | - $action = 'M'; |
|
| 1733 | - } /* move */ |
|
| 1731 | + if ('-' == $move[3]) { |
|
| 1732 | + $action = 'M'; |
|
| 1733 | + } /* move */ |
|
| 1734 | 1734 | |
| 1735 | - elseif ('x' == $move[3]) { |
|
| 1736 | - $action = 'A'; |
|
| 1737 | - } /* attack */ |
|
| 1735 | + elseif ('x' == $move[3]) { |
|
| 1736 | + $action = 'A'; |
|
| 1737 | + } /* attack */ |
|
| 1738 | 1738 | |
| 1739 | - else { |
|
| 1740 | - return [false, $this->move_msg(_MD_CHESS_MOVE_UNKNOWN_ACTION, $action)]; |
|
| 1741 | - } // "ERROR: $action is unknown! Please use \"-\" for a move and \"x\" for an attack." |
|
| 1739 | + else { |
|
| 1740 | + return [false, $this->move_msg(_MD_CHESS_MOVE_UNKNOWN_ACTION, $action)]; |
|
| 1741 | + } // "ERROR: $action is unknown! Please use \"-\" for a move and \"x\" for an attack." |
|
| 1742 | 1742 | |
| 1743 | - /* if attack an enemy unit must be present on tile |
|
| 1743 | + /* if attack an enemy unit must be present on tile |
|
| 1744 | 1744 | * and if move then tile must be empty. in both cases |
| 1745 | 1745 | * the king must not be checked after moving. */ |
| 1746 | 1746 | |
| 1747 | - /* check whether the move is along a valid path and |
|
| 1747 | + /* check whether the move is along a valid path and |
|
| 1748 | 1748 | * whether all tiles in between are empty thus the path |
| 1749 | 1749 | * is not blocked. the final destination tile is not |
| 1750 | 1750 | * checked here. */ |
| 1751 | 1751 | |
| 1752 | - if ('P' != $fig_type) { |
|
| 1753 | - if (!$this->tileIsReachable($fig_type, $fig_pos, $dest_pos)) { |
|
| 1754 | - return [false, $this->move_msg(_MD_CHESS_MOVE_OUT_OF_RANGE, $dest_coord, $fig_name, $fig_coord)]; |
|
| 1755 | - } // "ERROR: Tile $dest_coord is out of moving range for $fig_name at $fig_coord!" |
|
| 1756 | - } else { |
|
| 1757 | - if ('M' == $action && !$this->checkPawnMove($fig_pos, $dest_pos)) { |
|
| 1758 | - return [false, $this->move_msg(_MD_CHESS_MOVE_OUT_OF_RANGE, $dest_coord, $fig_name, $fig_coord)]; |
|
| 1759 | - } // "ERROR: Tile $dest_coord is out of moving range for $fig_name at $fig_coord!" |
|
| 1752 | + if ('P' != $fig_type) { |
|
| 1753 | + if (!$this->tileIsReachable($fig_type, $fig_pos, $dest_pos)) { |
|
| 1754 | + return [false, $this->move_msg(_MD_CHESS_MOVE_OUT_OF_RANGE, $dest_coord, $fig_name, $fig_coord)]; |
|
| 1755 | + } // "ERROR: Tile $dest_coord is out of moving range for $fig_name at $fig_coord!" |
|
| 1756 | + } else { |
|
| 1757 | + if ('M' == $action && !$this->checkPawnMove($fig_pos, $dest_pos)) { |
|
| 1758 | + return [false, $this->move_msg(_MD_CHESS_MOVE_OUT_OF_RANGE, $dest_coord, $fig_name, $fig_coord)]; |
|
| 1759 | + } // "ERROR: Tile $dest_coord is out of moving range for $fig_name at $fig_coord!" |
|
| 1760 | 1760 | |
| 1761 | - if ('A' == $action && !$this->checkPawnAttack($fig_pos, $dest_pos)) { |
|
| 1762 | - return [false, $this->move_msg(_MD_CHESS_MOVE_OUT_OF_RANGE, $dest_coord, $fig_name, $fig_coord)]; |
|
| 1763 | - } // "ERROR: Tile $dest_coord is out of attacking range for $fig_name at $fig_coord!" |
|
| 1764 | - } |
|
| 1761 | + if ('A' == $action && !$this->checkPawnAttack($fig_pos, $dest_pos)) { |
|
| 1762 | + return [false, $this->move_msg(_MD_CHESS_MOVE_OUT_OF_RANGE, $dest_coord, $fig_name, $fig_coord)]; |
|
| 1763 | + } // "ERROR: Tile $dest_coord is out of attacking range for $fig_name at $fig_coord!" |
|
| 1764 | + } |
|
| 1765 | 1765 | |
| 1766 | - $en_passant_capture_performed = 0; // 1 if en passant captured occurred, else 0 |
|
| 1766 | + $en_passant_capture_performed = 0; // 1 if en passant captured occurred, else 0 |
|
| 1767 | 1767 | |
| 1768 | - /* check action */ |
|
| 1768 | + /* check action */ |
|
| 1769 | 1769 | |
| 1770 | - if ('M' == $action && !$this->is_empty_tile($dest_pos)) { |
|
| 1771 | - return [false, $this->move_msg(_MD_CHESS_MOVE_OCCUPIED, $dest_coord)]; // "ERROR: Tile $dest_coord is occupied. You cannot move there." |
|
| 1772 | - } |
|
| 1770 | + if ('M' == $action && !$this->is_empty_tile($dest_pos)) { |
|
| 1771 | + return [false, $this->move_msg(_MD_CHESS_MOVE_OCCUPIED, $dest_coord)]; // "ERROR: Tile $dest_coord is occupied. You cannot move there." |
|
| 1772 | + } |
|
| 1773 | 1773 | |
| 1774 | - if ('A' == $action && $this->is_empty_tile($dest_pos)) { |
|
| 1775 | - /* en passant of pawn? */ |
|
| 1774 | + if ('A' == $action && $this->is_empty_tile($dest_pos)) { |
|
| 1775 | + /* en passant of pawn? */ |
|
| 1776 | 1776 | |
| 1777 | - if ('P' == $fig_type) { |
|
| 1778 | - if ($this->boardIndexToCoord($dest_pos) == $this->gamestate['fen_en_passant_target_square']) { |
|
| 1779 | - $en_passant_capture_performed = 1; |
|
| 1780 | - } |
|
| 1777 | + if ('P' == $fig_type) { |
|
| 1778 | + if ($this->boardIndexToCoord($dest_pos) == $this->gamestate['fen_en_passant_target_square']) { |
|
| 1779 | + $en_passant_capture_performed = 1; |
|
| 1780 | + } |
|
| 1781 | 1781 | |
| 1782 | - if (0 == $en_passant_capture_performed) { |
|
| 1783 | - return [false, _MD_CHESS_MOVE_NO_EN_PASSANT]; // "ERROR: en-passant no longer possible!" |
|
| 1784 | - } |
|
| 1785 | - } else { |
|
| 1786 | - return [false, $this->move_msg(_MD_CHESS_MOVE_ATTACK_EMPTY, $dest_coord)]; // "ERROR: Tile $dest_coord is empty. You cannot attack it." |
|
| 1787 | - } |
|
| 1788 | - } |
|
| 1782 | + if (0 == $en_passant_capture_performed) { |
|
| 1783 | + return [false, _MD_CHESS_MOVE_NO_EN_PASSANT]; // "ERROR: en-passant no longer possible!" |
|
| 1784 | + } |
|
| 1785 | + } else { |
|
| 1786 | + return [false, $this->move_msg(_MD_CHESS_MOVE_ATTACK_EMPTY, $dest_coord)]; // "ERROR: Tile $dest_coord is empty. You cannot attack it." |
|
| 1787 | + } |
|
| 1788 | + } |
|
| 1789 | 1789 | |
| 1790 | - if ('A' == $action && $this->board[$dest_pos][0] == $cur_player) { |
|
| 1791 | - return [false, $this->move_msg(_MD_CHESS_MOVE_ATTACK_SELF, $dest_coord)]; // "ERROR: You cannot attack own unit at $dest_coord." |
|
| 1792 | - } |
|
| 1790 | + if ('A' == $action && $this->board[$dest_pos][0] == $cur_player) { |
|
| 1791 | + return [false, $this->move_msg(_MD_CHESS_MOVE_ATTACK_SELF, $dest_coord)]; // "ERROR: You cannot attack own unit at $dest_coord." |
|
| 1792 | + } |
|
| 1793 | 1793 | |
| 1794 | - /* backup affected tiles */ |
|
| 1794 | + /* backup affected tiles */ |
|
| 1795 | 1795 | |
| 1796 | - $old_fig_tile = $this->board[$fig_pos]; |
|
| 1796 | + $old_fig_tile = $this->board[$fig_pos]; |
|
| 1797 | 1797 | |
| 1798 | - $old_dest_tile = $this->board[$dest_pos]; |
|
| 1798 | + $old_dest_tile = $this->board[$dest_pos]; |
|
| 1799 | 1799 | |
| 1800 | - /* perform move */ |
|
| 1800 | + /* perform move */ |
|
| 1801 | 1801 | |
| 1802 | - $this->clear_tile($fig_pos); |
|
| 1802 | + $this->clear_tile($fig_pos); |
|
| 1803 | 1803 | |
| 1804 | - if (!$this->is_empty_tile($dest_pos)) { |
|
| 1805 | - $this->piece_captured = \sprintf('%s%s', $this->board[$dest_pos], $dest_pos); |
|
| 1806 | - } |
|
| 1804 | + if (!$this->is_empty_tile($dest_pos)) { |
|
| 1805 | + $this->piece_captured = \sprintf('%s%s', $this->board[$dest_pos], $dest_pos); |
|
| 1806 | + } |
|
| 1807 | 1807 | |
| 1808 | - $this->board[$dest_pos] = "$cur_player$fig_type"; |
|
| 1808 | + $this->board[$dest_pos] = "$cur_player$fig_type"; |
|
| 1809 | 1809 | |
| 1810 | - if ($en_passant_capture_performed) { |
|
| 1811 | - /* kill pawn */ |
|
| 1810 | + if ($en_passant_capture_performed) { |
|
| 1811 | + /* kill pawn */ |
|
| 1812 | 1812 | |
| 1813 | - if ('w' == $cur_player) { |
|
| 1814 | - $this->clear_tile($dest_pos - 8); |
|
| 1813 | + if ('w' == $cur_player) { |
|
| 1814 | + $this->clear_tile($dest_pos - 8); |
|
| 1815 | 1815 | |
| 1816 | - $this->piece_captured = \sprintf('bP%s', $dest_pos - 8); |
|
| 1817 | - } else { |
|
| 1818 | - $this->clear_tile($dest_pos + 8); |
|
| 1816 | + $this->piece_captured = \sprintf('bP%s', $dest_pos - 8); |
|
| 1817 | + } else { |
|
| 1818 | + $this->clear_tile($dest_pos + 8); |
|
| 1819 | 1819 | |
| 1820 | - $this->piece_captured = \sprintf('wP%s', $dest_pos + 8); |
|
| 1821 | - } |
|
| 1822 | - } |
|
| 1820 | + $this->piece_captured = \sprintf('wP%s', $dest_pos + 8); |
|
| 1821 | + } |
|
| 1822 | + } |
|
| 1823 | 1823 | |
| 1824 | - /* check check :) */ |
|
| 1824 | + /* check check :) */ |
|
| 1825 | 1825 | |
| 1826 | - if ($this->kingIsUnderAttack($cur_player, $cur_opp)) { |
|
| 1827 | - $this->board[$fig_pos] = $old_fig_tile; |
|
| 1826 | + if ($this->kingIsUnderAttack($cur_player, $cur_opp)) { |
|
| 1827 | + $this->board[$fig_pos] = $old_fig_tile; |
|
| 1828 | 1828 | |
| 1829 | - $this->board[$dest_pos] = $old_dest_tile; |
|
| 1829 | + $this->board[$dest_pos] = $old_dest_tile; |
|
| 1830 | 1830 | |
| 1831 | - if ($en_passant_capture_performed) { |
|
| 1832 | - // restore pawn that was captured above, since that move is invalid |
|
| 1831 | + if ($en_passant_capture_performed) { |
|
| 1832 | + // restore pawn that was captured above, since that move is invalid |
|
| 1833 | 1833 | |
| 1834 | - if ('w' == $cur_player) { |
|
| 1835 | - $this->board[$dest_pos - 8] = 'bP'; |
|
| 1836 | - } else { |
|
| 1837 | - $this->board[$dest_pos + 8] = 'wP'; |
|
| 1838 | - } |
|
| 1839 | - } |
|
| 1834 | + if ('w' == $cur_player) { |
|
| 1835 | + $this->board[$dest_pos - 8] = 'bP'; |
|
| 1836 | + } else { |
|
| 1837 | + $this->board[$dest_pos + 8] = 'wP'; |
|
| 1838 | + } |
|
| 1839 | + } |
|
| 1840 | 1840 | |
| 1841 | - return [false, _MD_CHESS_MOVE_IN_CHECK]; // "ERROR: Move is invalid because king would be under attack then." |
|
| 1842 | - } |
|
| 1841 | + return [false, _MD_CHESS_MOVE_IN_CHECK]; // "ERROR: Move is invalid because king would be under attack then." |
|
| 1842 | + } |
|
| 1843 | 1843 | |
| 1844 | - // check whether this forbids any castling |
|
| 1844 | + // check whether this forbids any castling |
|
| 1845 | 1845 | |
| 1846 | - if ('K' == $fig_type) { |
|
| 1847 | - if ('w' == $cur_player) { |
|
| 1848 | - $white_may_castle_short = false; |
|
| 1846 | + if ('K' == $fig_type) { |
|
| 1847 | + if ('w' == $cur_player) { |
|
| 1848 | + $white_may_castle_short = false; |
|
| 1849 | 1849 | |
| 1850 | - $white_may_castle_long = false; |
|
| 1851 | - } else { |
|
| 1852 | - $black_may_castle_short = false; |
|
| 1850 | + $white_may_castle_long = false; |
|
| 1851 | + } else { |
|
| 1852 | + $black_may_castle_short = false; |
|
| 1853 | 1853 | |
| 1854 | - $black_may_castle_long = false; |
|
| 1855 | - } |
|
| 1856 | - } |
|
| 1854 | + $black_may_castle_long = false; |
|
| 1855 | + } |
|
| 1856 | + } |
|
| 1857 | 1857 | |
| 1858 | - if ('R' == $fig_type) { |
|
| 1859 | - if ('w' == $cur_player) { |
|
| 1860 | - if (7 == $fig_pos) { |
|
| 1861 | - $white_may_castle_short = false; |
|
| 1862 | - } elseif (0 == $fig_pos) { |
|
| 1863 | - $white_may_castle_long = false; |
|
| 1864 | - } |
|
| 1865 | - } else { |
|
| 1866 | - if (63 == $fig_pos) { |
|
| 1867 | - $black_may_castle_short = false; |
|
| 1868 | - } elseif (56 == $fig_pos) { |
|
| 1869 | - $black_may_castle_long = false; |
|
| 1870 | - } |
|
| 1871 | - } |
|
| 1872 | - } |
|
| 1858 | + if ('R' == $fig_type) { |
|
| 1859 | + if ('w' == $cur_player) { |
|
| 1860 | + if (7 == $fig_pos) { |
|
| 1861 | + $white_may_castle_short = false; |
|
| 1862 | + } elseif (0 == $fig_pos) { |
|
| 1863 | + $white_may_castle_long = false; |
|
| 1864 | + } |
|
| 1865 | + } else { |
|
| 1866 | + if (63 == $fig_pos) { |
|
| 1867 | + $black_may_castle_short = false; |
|
| 1868 | + } elseif (56 == $fig_pos) { |
|
| 1869 | + $black_may_castle_long = false; |
|
| 1870 | + } |
|
| 1871 | + } |
|
| 1872 | + } |
|
| 1873 | 1873 | |
| 1874 | - // if a pawn moved two tiles, this will allow 'en passant' on next move |
|
| 1874 | + // if a pawn moved two tiles, this will allow 'en passant' on next move |
|
| 1875 | 1875 | |
| 1876 | - if ('P' == $fig_type && 16 == \abs($fig_pos - $dest_pos)) { |
|
| 1877 | - $file_chars = 'abcdefgh'; |
|
| 1876 | + if ('P' == $fig_type && 16 == \abs($fig_pos - $dest_pos)) { |
|
| 1877 | + $file_chars = 'abcdefgh'; |
|
| 1878 | 1878 | |
| 1879 | - $this->gamestate['fen_en_passant_target_square'] = $file_chars[$fig_pos % 8] . ('w' == $cur_player ? '3' : '6'); |
|
| 1880 | - } else { |
|
| 1881 | - // clear 'en passant' |
|
| 1879 | + $this->gamestate['fen_en_passant_target_square'] = $file_chars[$fig_pos % 8] . ('w' == $cur_player ? '3' : '6'); |
|
| 1880 | + } else { |
|
| 1881 | + // clear 'en passant' |
|
| 1882 | 1882 | |
| 1883 | - $this->gamestate['fen_en_passant_target_square'] = '-'; |
|
| 1884 | - } |
|
| 1883 | + $this->gamestate['fen_en_passant_target_square'] = '-'; |
|
| 1884 | + } |
|
| 1885 | 1885 | |
| 1886 | - if ('M' == $action) { |
|
| 1887 | - $result = $this->move_msg(_MD_CHESS_MOVE_MOVED, $fig_name, $fig_coord, $dest_coord); |
|
| 1888 | - } else { |
|
| 1889 | - $result = $this->move_msg(_MD_CHESS_MOVE_CAPTURED, $fig_name, $dest_coord, $fig_coord); |
|
| 1890 | - } |
|
| 1886 | + if ('M' == $action) { |
|
| 1887 | + $result = $this->move_msg(_MD_CHESS_MOVE_MOVED, $fig_name, $fig_coord, $dest_coord); |
|
| 1888 | + } else { |
|
| 1889 | + $result = $this->move_msg(_MD_CHESS_MOVE_CAPTURED, $fig_name, $dest_coord, $fig_coord); |
|
| 1890 | + } |
|
| 1891 | 1891 | |
| 1892 | - /* if pawn reached last line convert into a queen */ |
|
| 1892 | + /* if pawn reached last line convert into a queen */ |
|
| 1893 | 1893 | |
| 1894 | - if ('P' == $fig_type) { |
|
| 1895 | - if (('w' == $cur_player && $dest_pos >= 56) |
|
| 1896 | - || ('b' == $cur_player && $dest_pos <= 7)) { |
|
| 1897 | - $pawn_upg = $move[\mb_strlen($move) - 1]; |
|
| 1894 | + if ('P' == $fig_type) { |
|
| 1895 | + if (('w' == $cur_player && $dest_pos >= 56) |
|
| 1896 | + || ('b' == $cur_player && $dest_pos <= 7)) { |
|
| 1897 | + $pawn_upg = $move[\mb_strlen($move) - 1]; |
|
| 1898 | 1898 | |
| 1899 | - if ('?' == $pawn_upg) { |
|
| 1900 | - $pawn_upg = 'Q'; |
|
| 1899 | + if ('?' == $pawn_upg) { |
|
| 1900 | + $pawn_upg = 'Q'; |
|
| 1901 | 1901 | |
| 1902 | - $history_move = \sprintf('%sQ', $history_move); |
|
| 1903 | - } |
|
| 1902 | + $history_move = \sprintf('%sQ', $history_move); |
|
| 1903 | + } |
|
| 1904 | 1904 | |
| 1905 | - $this->board[$dest_pos] = "$cur_player$pawn_upg"; |
|
| 1905 | + $this->board[$dest_pos] = "$cur_player$pawn_upg"; |
|
| 1906 | 1906 | |
| 1907 | - $result .= ' ... ' . $this->move_msg(_MD_CHESS_MOVE_PROMOTED, $this->getFullFigureName($pawn_upg)); |
|
| 1908 | - } |
|
| 1909 | - } |
|
| 1907 | + $result .= ' ... ' . $this->move_msg(_MD_CHESS_MOVE_PROMOTED, $this->getFullFigureName($pawn_upg)); |
|
| 1908 | + } |
|
| 1909 | + } |
|
| 1910 | 1910 | |
| 1911 | - $move_handled = 1; |
|
| 1912 | - } |
|
| 1911 | + $move_handled = 1; |
|
| 1912 | + } |
|
| 1913 | 1913 | |
| 1914 | - /* if a legal move was performed test whether you |
|
| 1914 | + /* if a legal move was performed test whether you |
|
| 1915 | 1915 | * check the opponent or even check-mate him. then |
| 1916 | 1916 | * update castling and en-passant flags, select the |
| 1917 | 1917 | * next player and add the move to the history. */ |
| 1918 | 1918 | |
| 1919 | - if ($move_handled) { |
|
| 1920 | - // Use $this->board to update $this->gamestate['fen_piece_placement']. |
|
| 1919 | + if ($move_handled) { |
|
| 1920 | + // Use $this->board to update $this->gamestate['fen_piece_placement']. |
|
| 1921 | 1921 | |
| 1922 | - $this->board_to_fen_piece_placement(); |
|
| 1922 | + $this->board_to_fen_piece_placement(); |
|
| 1923 | 1923 | |
| 1924 | - // handle check, checkmate and stalemate |
|
| 1924 | + // handle check, checkmate and stalemate |
|
| 1925 | 1925 | |
| 1926 | - $comment = ''; |
|
| 1926 | + $comment = ''; |
|
| 1927 | 1927 | |
| 1928 | - if ($this->kingIsUnderAttack($cur_opp, $cur_player)) { |
|
| 1929 | - // if this is check mate finish the game, otherwise if not just add a + to the move |
|
| 1928 | + if ($this->kingIsUnderAttack($cur_opp, $cur_player)) { |
|
| 1929 | + // if this is check mate finish the game, otherwise if not just add a + to the move |
|
| 1930 | 1930 | |
| 1931 | - if ($this->isCheckMate($cur_opp, $cur_player)) { |
|
| 1932 | - $this->gamestate['pgn_result'] = 'w' == $cur_player ? '1-0' : '0-1'; |
|
| 1931 | + if ($this->isCheckMate($cur_opp, $cur_player)) { |
|
| 1932 | + $this->gamestate['pgn_result'] = 'w' == $cur_player ? '1-0' : '0-1'; |
|
| 1933 | 1933 | |
| 1934 | - $history_move .= '#'; |
|
| 1934 | + $history_move .= '#'; |
|
| 1935 | 1935 | |
| 1936 | - $result .= ' ... ' . _MD_CHESS_MOVE_CHECKMATE; |
|
| 1937 | - } else { |
|
| 1938 | - $history_move .= '+'; |
|
| 1939 | - } |
|
| 1940 | - } elseif ($this->isStaleMate($cur_opp, $cur_player)) { |
|
| 1941 | - $this->gamestate['pgn_result'] = '1/2-1/2'; |
|
| 1936 | + $result .= ' ... ' . _MD_CHESS_MOVE_CHECKMATE; |
|
| 1937 | + } else { |
|
| 1938 | + $history_move .= '+'; |
|
| 1939 | + } |
|
| 1940 | + } elseif ($this->isStaleMate($cur_opp, $cur_player)) { |
|
| 1941 | + $this->gamestate['pgn_result'] = '1/2-1/2'; |
|
| 1942 | 1942 | |
| 1943 | - $result .= ' ... ' . _MD_CHESS_MOVE_STALEMATE; |
|
| 1943 | + $result .= ' ... ' . _MD_CHESS_MOVE_STALEMATE; |
|
| 1944 | 1944 | |
| 1945 | - $comment = _MD_CHESS_DRAW_STALEMATE; |
|
| 1946 | - } elseif ($this->insufficient_mating_material()) { |
|
| 1947 | - $this->gamestate['pgn_result'] = '1/2-1/2'; |
|
| 1945 | + $comment = _MD_CHESS_DRAW_STALEMATE; |
|
| 1946 | + } elseif ($this->insufficient_mating_material()) { |
|
| 1947 | + $this->gamestate['pgn_result'] = '1/2-1/2'; |
|
| 1948 | 1948 | |
| 1949 | - $result .= ' ... ' . _MD_CHESS_MOVE_MATERIAL; |
|
| 1949 | + $result .= ' ... ' . _MD_CHESS_MOVE_MATERIAL; |
|
| 1950 | 1950 | |
| 1951 | - $comment = _MD_CHESS_DRAW_NO_MATE; |
|
| 1952 | - } |
|
| 1951 | + $comment = _MD_CHESS_DRAW_NO_MATE; |
|
| 1952 | + } |
|
| 1953 | 1953 | |
| 1954 | - // store possible castling-availability modification |
|
| 1954 | + // store possible castling-availability modification |
|
| 1955 | 1955 | |
| 1956 | - $KQkq = ($white_may_castle_short ? 'K' : '') . ($white_may_castle_long ? 'Q' : '') . ($black_may_castle_short ? 'k' : '') . ($black_may_castle_long ? 'q' : ''); |
|
| 1956 | + $KQkq = ($white_may_castle_short ? 'K' : '') . ($white_may_castle_long ? 'Q' : '') . ($black_may_castle_short ? 'k' : '') . ($black_may_castle_long ? 'q' : ''); |
|
| 1957 | 1957 | |
| 1958 | - $this->gamestate['fen_castling_availability'] = !empty($KQkq) ? $KQkq : '-'; |
|
| 1958 | + $this->gamestate['fen_castling_availability'] = !empty($KQkq) ? $KQkq : '-'; |
|
| 1959 | 1959 | |
| 1960 | - // strip old result-string from end of movetext |
|
| 1960 | + // strip old result-string from end of movetext |
|
| 1961 | 1961 | |
| 1962 | - // It's assumed that the movetext for a game in play is terminated by a '*', possibly preceded by whitespace. |
|
| 1962 | + // It's assumed that the movetext for a game in play is terminated by a '*', possibly preceded by whitespace. |
|
| 1963 | 1963 | |
| 1964 | - // (The whitespace will be present unless there are no moves in the game yet.) |
|
| 1964 | + // (The whitespace will be present unless there are no moves in the game yet.) |
|
| 1965 | 1965 | |
| 1966 | - $this->gamestate['pgn_movetext'] = \preg_replace('/\s*\*$/', '', $this->gamestate['pgn_movetext']); |
|
| 1966 | + $this->gamestate['pgn_movetext'] = \preg_replace('/\s*\*$/', '', $this->gamestate['pgn_movetext']); |
|
| 1967 | 1967 | |
| 1968 | - // if white move, output move-number |
|
| 1968 | + // if white move, output move-number |
|
| 1969 | 1969 | |
| 1970 | - if ('w' == $this->gamestate['fen_active_color']) { |
|
| 1971 | - if (!empty($this->gamestate['pgn_movetext'])) { |
|
| 1972 | - $this->gamestate['pgn_movetext'] .= ' '; |
|
| 1973 | - } |
|
| 1970 | + if ('w' == $this->gamestate['fen_active_color']) { |
|
| 1971 | + if (!empty($this->gamestate['pgn_movetext'])) { |
|
| 1972 | + $this->gamestate['pgn_movetext'] .= ' '; |
|
| 1973 | + } |
|
| 1974 | 1974 | |
| 1975 | - $this->gamestate['pgn_movetext'] .= $this->gamestate['fen_fullmove_number'] . '.'; |
|
| 1976 | - // if black move, no moves yet, and game is setup, output move number with special '...' terminator |
|
| 1977 | - } elseif (empty($this->gamestate['pgn_movetext']) && !empty($this->gamestate['pgn_fen'])) { |
|
| 1978 | - $this->gamestate['pgn_movetext'] .= $this->gamestate['fen_fullmove_number'] . '...'; |
|
| 1979 | - } |
|
| 1975 | + $this->gamestate['pgn_movetext'] .= $this->gamestate['fen_fullmove_number'] . '.'; |
|
| 1976 | + // if black move, no moves yet, and game is setup, output move number with special '...' terminator |
|
| 1977 | + } elseif (empty($this->gamestate['pgn_movetext']) && !empty($this->gamestate['pgn_fen'])) { |
|
| 1978 | + $this->gamestate['pgn_movetext'] .= $this->gamestate['fen_fullmove_number'] . '...'; |
|
| 1979 | + } |
|
| 1980 | 1980 | |
| 1981 | - // update movetext |
|
| 1981 | + // update movetext |
|
| 1982 | 1982 | |
| 1983 | - // comment is added only for a concluded game |
|
| 1983 | + // comment is added only for a concluded game |
|
| 1984 | 1984 | |
| 1985 | - $this->gamestate['pgn_movetext'] .= ' ' . $history_move . ' ' . $this->gamestate['pgn_result']; |
|
| 1986 | - |
|
| 1987 | - if (!empty($comment)) { |
|
| 1988 | - $this->gamestate['pgn_movetext'] .= ' {' . $comment . '}'; |
|
| 1989 | - } |
|
| 1990 | - |
|
| 1991 | - // if black move, increment move-number |
|
| 1985 | + $this->gamestate['pgn_movetext'] .= ' ' . $history_move . ' ' . $this->gamestate['pgn_result']; |
|
| 1986 | + |
|
| 1987 | + if (!empty($comment)) { |
|
| 1988 | + $this->gamestate['pgn_movetext'] .= ' {' . $comment . '}'; |
|
| 1989 | + } |
|
| 1990 | + |
|
| 1991 | + // if black move, increment move-number |
|
| 1992 | 1992 | |
| 1993 | - if ('b' == $this->gamestate['fen_active_color']) { |
|
| 1994 | - ++$this->gamestate['fen_fullmove_number']; |
|
| 1995 | - } |
|
| 1993 | + if ('b' == $this->gamestate['fen_active_color']) { |
|
| 1994 | + ++$this->gamestate['fen_fullmove_number']; |
|
| 1995 | + } |
|
| 1996 | 1996 | |
| 1997 | - // If pawn advance or capturing move, reset the halfmove clock. Otherwise increment it. |
|
| 1997 | + // If pawn advance or capturing move, reset the halfmove clock. Otherwise increment it. |
|
| 1998 | 1998 | |
| 1999 | - if ('O-O' != $move && 'O-O-O' != $move && (0 === \strpos($move, 'P') || 'x' == $move[3])) { |
|
| 2000 | - $this->gamestate['fen_halfmove_clock'] = 0; |
|
| 2001 | - } else { |
|
| 2002 | - ++$this->gamestate['fen_halfmove_clock']; |
|
| 2003 | - } |
|
| 1999 | + if ('O-O' != $move && 'O-O-O' != $move && (0 === \strpos($move, 'P') || 'x' == $move[3])) { |
|
| 2000 | + $this->gamestate['fen_halfmove_clock'] = 0; |
|
| 2001 | + } else { |
|
| 2002 | + ++$this->gamestate['fen_halfmove_clock']; |
|
| 2003 | + } |
|
| 2004 | 2004 | |
| 2005 | - // set next player |
|
| 2005 | + // set next player |
|
| 2006 | 2006 | |
| 2007 | - $this->gamestate['fen_active_color'] = 'w' == $this->gamestate['fen_active_color'] ? 'b' : 'w'; |
|
| 2008 | - } |
|
| 2007 | + $this->gamestate['fen_active_color'] = 'w' == $this->gamestate['fen_active_color'] ? 'b' : 'w'; |
|
| 2008 | + } |
|
| 2009 | 2009 | |
| 2010 | - return [$move_handled, $result]; |
|
| 2011 | - } |
|
| 2010 | + return [$move_handled, $result]; |
|
| 2011 | + } |
|
| 2012 | 2012 | |
| 2013 | - /** |
|
| 2014 | - * Check whether a tile is empty. |
|
| 2015 | - * |
|
| 2016 | - * @param int $position |
|
| 2017 | - * @return bool |
|
| 2018 | - * |
|
| 2019 | - * @access private |
|
| 2020 | - */ |
|
| 2021 | - public function is_empty_tile($position) |
|
| 2022 | - { |
|
| 2023 | - return '00' == $this->board[$position]; |
|
| 2024 | - } |
|
| 2025 | - |
|
| 2026 | - /** |
|
| 2027 | - * Clear a tile. |
|
| 2028 | - * |
|
| 2029 | - * @param int $position Position of tile |
|
| 2030 | - * |
|
| 2031 | - * @access private |
|
| 2032 | - */ |
|
| 2033 | - public function clear_tile($position) |
|
| 2034 | - { |
|
| 2035 | - $this->board[$position] = '00'; |
|
| 2036 | - } |
|
| 2037 | - |
|
| 2038 | - /** |
|
| 2039 | - * Convert FEN piece placement field to array. |
|
| 2040 | - * |
|
| 2041 | - * Use $this->gamestate['fen_piece_placement'] to initialize $this->board, $this->w_figures and $this->b_figures. |
|
| 2042 | - * |
|
| 2043 | - * @return bool True if piece placement is valid, otherwise false. |
|
| 2044 | - * |
|
| 2045 | - * @access private |
|
| 2046 | - */ |
|
| 2047 | - public function fen_piece_placement_to_board() |
|
| 2048 | - { |
|
| 2049 | - if (empty($this->gamestate['fen_piece_placement']) || \mb_strlen($this->gamestate['fen_piece_placement']) > 71) { |
|
| 2050 | - #trigger_error('piece placement empty or length invalid', E_USER_WARNING); #*#DEBUG# |
|
| 2051 | - return false; // invalid length |
|
| 2052 | - } |
|
| 2053 | - |
|
| 2054 | - $this->board = []; |
|
| 2055 | - |
|
| 2056 | - $piece_map = [ |
|
| 2057 | - 'K' => 'wK', |
|
| 2058 | - 'Q' => 'wQ', |
|
| 2059 | - 'R' => 'wR', |
|
| 2060 | - 'B' => 'wB', |
|
| 2061 | - 'N' => 'wN', |
|
| 2062 | - 'P' => 'wP', |
|
| 2063 | - 'k' => 'bK', |
|
| 2064 | - 'q' => 'bQ', |
|
| 2065 | - 'r' => 'bR', |
|
| 2066 | - 'b' => 'bB', |
|
| 2067 | - 'n' => 'bN', |
|
| 2068 | - 'p' => 'bP', |
|
| 2069 | - ]; |
|
| 2070 | - |
|
| 2071 | - $tiles = \implode('', \array_reverse(\explode('/', $this->gamestate['fen_piece_placement']))); |
|
| 2072 | - |
|
| 2073 | - for ($i = 0, $iMax = mb_strlen($tiles); $i < $iMax; ++$i) { |
|
| 2074 | - $tile = $tiles[$i]; |
|
| 2075 | - |
|
| 2076 | - if (isset($piece_map[$tile])) { |
|
| 2077 | - $this->board[] = $piece_map[$tile]; |
|
| 2078 | - } elseif (\is_numeric($tile) && $tile >= 1 && $tile <= 8) { |
|
| 2079 | - for ($j = 0; $j < $tile; ++$j) { |
|
| 2080 | - $this->board[] = '00'; |
|
| 2081 | - } |
|
| 2082 | - } else { |
|
| 2083 | - #trigger_error("tile='$tile'", E_USER_WARNING); #*#DEBUG# |
|
| 2084 | - return false; // unexpected character in piece_placement |
|
| 2085 | - } |
|
| 2086 | - } |
|
| 2087 | - |
|
| 2088 | - if (64 != \count($this->board)) { |
|
| 2089 | - #trigger_error('count(board)=' . count($this->board), E_USER_WARNING); #*#DEBUG# |
|
| 2090 | - return false; // piece_placement has incorrect number of tiles |
|
| 2091 | - } |
|
| 2092 | - |
|
| 2093 | - $this->w_figures = []; |
|
| 2094 | - |
|
| 2095 | - $this->b_figures = []; |
|
| 2096 | - |
|
| 2097 | - for ($i = 0; $i < 64; ++$i) { |
|
| 2098 | - $tile = $this->board[$i]; |
|
| 2099 | - |
|
| 2100 | - $coordinates = $this->boardIndexToCoord($i); |
|
| 2101 | - |
|
| 2102 | - if ('w' == $tile[0]) { |
|
| 2103 | - $this->w_figures[] = $tile[1] . $coordinates; |
|
| 2104 | - } elseif ('b' == $tile[0]) { |
|
| 2105 | - $this->b_figures[] = $tile[1] . $coordinates; |
|
| 2106 | - } |
|
| 2107 | - } |
|
| 2108 | - |
|
| 2109 | - return true; |
|
| 2110 | - } |
|
| 2111 | - |
|
| 2112 | - /** |
|
| 2113 | - * Convert array to FEN piece placement field. |
|
| 2114 | - * |
|
| 2115 | - * Use $this->board to initialize $this->gamestate['fen_piece_placement']. |
|
| 2116 | - * |
|
| 2117 | - * @access private |
|
| 2118 | - */ |
|
| 2119 | - public function board_to_fen_piece_placement() |
|
| 2120 | - { |
|
| 2121 | - $rows = []; |
|
| 2122 | - |
|
| 2123 | - for ($rank = 7; $rank >= 0; --$rank) { |
|
| 2124 | - $row = ''; |
|
| 2125 | - |
|
| 2126 | - for ($file = 0; $file < 8; ++$file) { |
|
| 2127 | - $index = 8 * $rank + $file; |
|
| 2128 | - |
|
| 2129 | - if (!$this->is_empty_tile($index)) { |
|
| 2130 | - $tile = $this->board[$index]; |
|
| 2131 | - |
|
| 2132 | - $piece = 'w' == $tile[0] ? $tile[1] : \mb_strtolower($tile[1]); // 'K','Q','R','B','N' or 'P' (uppercase for white, lowercase for black) |
|
| 2133 | - } else { |
|
| 2134 | - $piece = 'x'; // temporarily mark each empty tile with 'x' |
|
| 2135 | - } |
|
| 2136 | - |
|
| 2137 | - $row .= $piece; // append piece symbol to row-string |
|
| 2138 | - } |
|
| 2139 | - |
|
| 2140 | - $rows[] = $row; |
|
| 2141 | - } |
|
| 2142 | - |
|
| 2143 | - // Concatenate the eight row-strings with the separator '/'. |
|
| 2144 | - |
|
| 2145 | - // Then replace each string of x's with the string length. |
|
| 2146 | - |
|
| 2147 | - $this->gamestate['fen_piece_placement'] = \preg_replace_callback('/(x+)/', static function($matches) {return \strlen($matches[1]);}, \implode('/', $rows)); |
|
| 2148 | - } |
|
| 2149 | - |
|
| 2150 | - /** |
|
| 2151 | - * Determine whether there is insufficient material to mate. |
|
| 2152 | - * |
|
| 2153 | - * @return bool True if only the following pieces remain: K vs. K, K vs. K+B or K vs. K+N; otherwise false. |
|
| 2154 | - * |
|
| 2155 | - * @access private |
|
| 2156 | - */ |
|
| 2157 | - public function insufficient_mating_material() |
|
| 2158 | - { |
|
| 2159 | - $pieces = \mb_strtoupper($this->gamestate['fen_piece_placement']); |
|
| 2160 | - |
|
| 2161 | - $counts = \count_chars($pieces, 1); |
|
| 2162 | - |
|
| 2163 | - $num_queens = (int)@$counts[\ord('Q')]; |
|
| 2164 | - |
|
| 2165 | - $num_rooks = (int)@$counts[\ord('R')]; |
|
| 2166 | - |
|
| 2167 | - $num_bishops = (int)@$counts[\ord('B')]; |
|
| 2168 | - |
|
| 2169 | - $num_knights = (int)@$counts[\ord('N')]; |
|
| 2170 | - |
|
| 2171 | - $num_pawns = (int)@$counts[\ord('P')]; |
|
| 2172 | - |
|
| 2173 | - return 0 == $num_queens && 0 == $num_rooks && ($num_bishops + $num_knights) <= 1 && 0 == $num_pawns; |
|
| 2174 | - } |
|
| 2175 | - |
|
| 2176 | - // -------------------------- |
|
| 2177 | - |
|
| 2178 | - // INCIDENTAL PRIVATE METHODS |
|
| 2179 | - |
|
| 2180 | - // -------------------------- |
|
| 2181 | - |
|
| 2182 | - // These functions don't really need to be class methods, since they don't access class properties. |
|
| 2183 | - |
|
| 2184 | - // They're placed within the class only for name-scoping. |
|
| 2185 | - |
|
| 2186 | - /** |
|
| 2187 | - * Convert board coordinates [a-h][1-8] to board index [0..63] |
|
| 2188 | - * |
|
| 2189 | - * @param string $coord Example: 'b3' |
|
| 2190 | - * @return int Example: 17 |
|
| 2191 | - * |
|
| 2192 | - * @access private |
|
| 2193 | - */ |
|
| 2194 | - public function boardCoordToIndex($coord) |
|
| 2195 | - { |
|
| 2196 | - //echo $coord," --> "; |
|
| 2197 | - |
|
| 2198 | - switch ($coord[0]) { |
|
| 2199 | - case 'a': |
|
| 2200 | - $x = 0; |
|
| 2201 | - break; |
|
| 2202 | - case 'b': |
|
| 2203 | - $x = 1; |
|
| 2204 | - break; |
|
| 2205 | - case 'c': |
|
| 2206 | - $x = 2; |
|
| 2207 | - break; |
|
| 2208 | - case 'd': |
|
| 2209 | - $x = 3; |
|
| 2210 | - break; |
|
| 2211 | - case 'e': |
|
| 2212 | - $x = 4; |
|
| 2213 | - break; |
|
| 2214 | - case 'f': |
|
| 2215 | - $x = 5; |
|
| 2216 | - break; |
|
| 2217 | - case 'g': |
|
| 2218 | - $x = 6; |
|
| 2219 | - break; |
|
| 2220 | - case 'h': |
|
| 2221 | - $x = 7; |
|
| 2222 | - break; |
|
| 2223 | - default: |
|
| 2224 | - return 64; /* erronous coord */ |
|
| 2225 | - } |
|
| 2226 | - |
|
| 2227 | - $y = $coord[1] - 1; |
|
| 2228 | - |
|
| 2229 | - if ($y < 0 || $y > 7) { |
|
| 2230 | - return 64; |
|
| 2231 | - } /* erronous coord */ |
|
| 2232 | - |
|
| 2233 | - return $y * 8 + $x; |
|
| 2234 | - //echo "$index | "; |
|
| 2235 | - } |
|
| 2236 | - |
|
| 2237 | - /** |
|
| 2238 | - * Convert board index [0..63] to board coordinates [a-h][1-8]. |
|
| 2239 | - * |
|
| 2240 | - * @param int $index Example: 17 |
|
| 2241 | - * @return string Example: 'b3' |
|
| 2242 | - * |
|
| 2243 | - * @access private |
|
| 2244 | - */ |
|
| 2245 | - public function boardIndexToCoord($index) |
|
| 2246 | - { |
|
| 2247 | - //echo $index," --> "; |
|
| 2248 | - |
|
| 2249 | - if ($index < 0 || $index > 63) { |
|
| 2250 | - return ''; |
|
| 2251 | - } |
|
| 2252 | - |
|
| 2253 | - $y = \floor($index / 8) + 1; |
|
| 2254 | - |
|
| 2255 | - $x = \chr(($index % 8) + 97); |
|
| 2256 | - |
|
| 2257 | - return "$x$y"; |
|
| 2258 | - } |
|
| 2259 | - |
|
| 2260 | - /** |
|
| 2261 | - * Get piece name from piece symbol. |
|
| 2262 | - * |
|
| 2263 | - * @param string $short Piece symbol |
|
| 2264 | - * @return string Piece name |
|
| 2265 | - * |
|
| 2266 | - * @access private |
|
| 2267 | - */ |
|
| 2268 | - public function getFullFigureName($short) |
|
| 2269 | - { |
|
| 2270 | - static $names = [ |
|
| 2271 | - 'K' => _MD_CHESS_MOVE_KING, |
|
| 2272 | - 'Q' => _MD_CHESS_MOVE_QUEEN, |
|
| 2273 | - 'R' => _MD_CHESS_MOVE_ROOK, |
|
| 2274 | - 'B' => _MD_CHESS_MOVE_BISHOP, |
|
| 2275 | - 'N' => _MD_CHESS_MOVE_KNIGHT, |
|
| 2276 | - 'P' => _MD_CHESS_MOVE_PAWN, |
|
| 2277 | - ]; |
|
| 2278 | - |
|
| 2279 | - return $names[$short] ?? _MD_CHESS_MOVE_EMPTY; |
|
| 2280 | - } |
|
| 2281 | - |
|
| 2282 | - /** |
|
| 2283 | - * Get tiles adjacent to specified tile. |
|
| 2284 | - * |
|
| 2285 | - * @param int $fig_pos |
|
| 2286 | - * @return array |
|
| 2287 | - * |
|
| 2288 | - * @access private |
|
| 2289 | - */ |
|
| 2290 | - public function getAdjTiles($fig_pos) |
|
| 2291 | - { |
|
| 2292 | - $adj_tiles = []; |
|
| 2293 | - |
|
| 2294 | - $i = 0; |
|
| 2295 | - |
|
| 2296 | - $x = $fig_pos % 8; |
|
| 2297 | - |
|
| 2298 | - $y = \floor($fig_pos / 8); |
|
| 2299 | - |
|
| 2300 | - if ($x > 0 && $y > 0) { |
|
| 2301 | - $adj_tiles[$i++] = $fig_pos - 9; |
|
| 2302 | - } |
|
| 2303 | - |
|
| 2304 | - if ($y > 0) { |
|
| 2305 | - $adj_tiles[$i++] = $fig_pos - 8; |
|
| 2306 | - } |
|
| 2307 | - |
|
| 2308 | - if ($x < 7 && $y > 0) { |
|
| 2309 | - $adj_tiles[$i++] = $fig_pos - 7; |
|
| 2310 | - } |
|
| 2311 | - |
|
| 2312 | - if ($x < 7) { |
|
| 2313 | - $adj_tiles[$i++] = $fig_pos + 1; |
|
| 2314 | - } |
|
| 2315 | - |
|
| 2316 | - if ($x < 7 && $y < 7) { |
|
| 2317 | - $adj_tiles[$i++] = $fig_pos + 9; |
|
| 2318 | - } |
|
| 2319 | - |
|
| 2320 | - if ($y < 7) { |
|
| 2321 | - $adj_tiles[$i++] = $fig_pos + 8; |
|
| 2322 | - } |
|
| 2323 | - |
|
| 2324 | - if ($x > 0 && $y < 7) { |
|
| 2325 | - $adj_tiles[$i++] = $fig_pos + 7; |
|
| 2326 | - } |
|
| 2327 | - |
|
| 2328 | - if ($x > 0) { |
|
| 2329 | - $adj_tiles[$i++] = $fig_pos - 1; |
|
| 2330 | - } |
|
| 2331 | - |
|
| 2332 | - /* DEBUG: foreach( $adj_tiles as $tile ) |
|
| 2013 | + /** |
|
| 2014 | + * Check whether a tile is empty. |
|
| 2015 | + * |
|
| 2016 | + * @param int $position |
|
| 2017 | + * @return bool |
|
| 2018 | + * |
|
| 2019 | + * @access private |
|
| 2020 | + */ |
|
| 2021 | + public function is_empty_tile($position) |
|
| 2022 | + { |
|
| 2023 | + return '00' == $this->board[$position]; |
|
| 2024 | + } |
|
| 2025 | + |
|
| 2026 | + /** |
|
| 2027 | + * Clear a tile. |
|
| 2028 | + * |
|
| 2029 | + * @param int $position Position of tile |
|
| 2030 | + * |
|
| 2031 | + * @access private |
|
| 2032 | + */ |
|
| 2033 | + public function clear_tile($position) |
|
| 2034 | + { |
|
| 2035 | + $this->board[$position] = '00'; |
|
| 2036 | + } |
|
| 2037 | + |
|
| 2038 | + /** |
|
| 2039 | + * Convert FEN piece placement field to array. |
|
| 2040 | + * |
|
| 2041 | + * Use $this->gamestate['fen_piece_placement'] to initialize $this->board, $this->w_figures and $this->b_figures. |
|
| 2042 | + * |
|
| 2043 | + * @return bool True if piece placement is valid, otherwise false. |
|
| 2044 | + * |
|
| 2045 | + * @access private |
|
| 2046 | + */ |
|
| 2047 | + public function fen_piece_placement_to_board() |
|
| 2048 | + { |
|
| 2049 | + if (empty($this->gamestate['fen_piece_placement']) || \mb_strlen($this->gamestate['fen_piece_placement']) > 71) { |
|
| 2050 | + #trigger_error('piece placement empty or length invalid', E_USER_WARNING); #*#DEBUG# |
|
| 2051 | + return false; // invalid length |
|
| 2052 | + } |
|
| 2053 | + |
|
| 2054 | + $this->board = []; |
|
| 2055 | + |
|
| 2056 | + $piece_map = [ |
|
| 2057 | + 'K' => 'wK', |
|
| 2058 | + 'Q' => 'wQ', |
|
| 2059 | + 'R' => 'wR', |
|
| 2060 | + 'B' => 'wB', |
|
| 2061 | + 'N' => 'wN', |
|
| 2062 | + 'P' => 'wP', |
|
| 2063 | + 'k' => 'bK', |
|
| 2064 | + 'q' => 'bQ', |
|
| 2065 | + 'r' => 'bR', |
|
| 2066 | + 'b' => 'bB', |
|
| 2067 | + 'n' => 'bN', |
|
| 2068 | + 'p' => 'bP', |
|
| 2069 | + ]; |
|
| 2070 | + |
|
| 2071 | + $tiles = \implode('', \array_reverse(\explode('/', $this->gamestate['fen_piece_placement']))); |
|
| 2072 | + |
|
| 2073 | + for ($i = 0, $iMax = mb_strlen($tiles); $i < $iMax; ++$i) { |
|
| 2074 | + $tile = $tiles[$i]; |
|
| 2075 | + |
|
| 2076 | + if (isset($piece_map[$tile])) { |
|
| 2077 | + $this->board[] = $piece_map[$tile]; |
|
| 2078 | + } elseif (\is_numeric($tile) && $tile >= 1 && $tile <= 8) { |
|
| 2079 | + for ($j = 0; $j < $tile; ++$j) { |
|
| 2080 | + $this->board[] = '00'; |
|
| 2081 | + } |
|
| 2082 | + } else { |
|
| 2083 | + #trigger_error("tile='$tile'", E_USER_WARNING); #*#DEBUG# |
|
| 2084 | + return false; // unexpected character in piece_placement |
|
| 2085 | + } |
|
| 2086 | + } |
|
| 2087 | + |
|
| 2088 | + if (64 != \count($this->board)) { |
|
| 2089 | + #trigger_error('count(board)=' . count($this->board), E_USER_WARNING); #*#DEBUG# |
|
| 2090 | + return false; // piece_placement has incorrect number of tiles |
|
| 2091 | + } |
|
| 2092 | + |
|
| 2093 | + $this->w_figures = []; |
|
| 2094 | + |
|
| 2095 | + $this->b_figures = []; |
|
| 2096 | + |
|
| 2097 | + for ($i = 0; $i < 64; ++$i) { |
|
| 2098 | + $tile = $this->board[$i]; |
|
| 2099 | + |
|
| 2100 | + $coordinates = $this->boardIndexToCoord($i); |
|
| 2101 | + |
|
| 2102 | + if ('w' == $tile[0]) { |
|
| 2103 | + $this->w_figures[] = $tile[1] . $coordinates; |
|
| 2104 | + } elseif ('b' == $tile[0]) { |
|
| 2105 | + $this->b_figures[] = $tile[1] . $coordinates; |
|
| 2106 | + } |
|
| 2107 | + } |
|
| 2108 | + |
|
| 2109 | + return true; |
|
| 2110 | + } |
|
| 2111 | + |
|
| 2112 | + /** |
|
| 2113 | + * Convert array to FEN piece placement field. |
|
| 2114 | + * |
|
| 2115 | + * Use $this->board to initialize $this->gamestate['fen_piece_placement']. |
|
| 2116 | + * |
|
| 2117 | + * @access private |
|
| 2118 | + */ |
|
| 2119 | + public function board_to_fen_piece_placement() |
|
| 2120 | + { |
|
| 2121 | + $rows = []; |
|
| 2122 | + |
|
| 2123 | + for ($rank = 7; $rank >= 0; --$rank) { |
|
| 2124 | + $row = ''; |
|
| 2125 | + |
|
| 2126 | + for ($file = 0; $file < 8; ++$file) { |
|
| 2127 | + $index = 8 * $rank + $file; |
|
| 2128 | + |
|
| 2129 | + if (!$this->is_empty_tile($index)) { |
|
| 2130 | + $tile = $this->board[$index]; |
|
| 2131 | + |
|
| 2132 | + $piece = 'w' == $tile[0] ? $tile[1] : \mb_strtolower($tile[1]); // 'K','Q','R','B','N' or 'P' (uppercase for white, lowercase for black) |
|
| 2133 | + } else { |
|
| 2134 | + $piece = 'x'; // temporarily mark each empty tile with 'x' |
|
| 2135 | + } |
|
| 2136 | + |
|
| 2137 | + $row .= $piece; // append piece symbol to row-string |
|
| 2138 | + } |
|
| 2139 | + |
|
| 2140 | + $rows[] = $row; |
|
| 2141 | + } |
|
| 2142 | + |
|
| 2143 | + // Concatenate the eight row-strings with the separator '/'. |
|
| 2144 | + |
|
| 2145 | + // Then replace each string of x's with the string length. |
|
| 2146 | + |
|
| 2147 | + $this->gamestate['fen_piece_placement'] = \preg_replace_callback('/(x+)/', static function($matches) {return \strlen($matches[1]);}, \implode('/', $rows)); |
|
| 2148 | + } |
|
| 2149 | + |
|
| 2150 | + /** |
|
| 2151 | + * Determine whether there is insufficient material to mate. |
|
| 2152 | + * |
|
| 2153 | + * @return bool True if only the following pieces remain: K vs. K, K vs. K+B or K vs. K+N; otherwise false. |
|
| 2154 | + * |
|
| 2155 | + * @access private |
|
| 2156 | + */ |
|
| 2157 | + public function insufficient_mating_material() |
|
| 2158 | + { |
|
| 2159 | + $pieces = \mb_strtoupper($this->gamestate['fen_piece_placement']); |
|
| 2160 | + |
|
| 2161 | + $counts = \count_chars($pieces, 1); |
|
| 2162 | + |
|
| 2163 | + $num_queens = (int)@$counts[\ord('Q')]; |
|
| 2164 | + |
|
| 2165 | + $num_rooks = (int)@$counts[\ord('R')]; |
|
| 2166 | + |
|
| 2167 | + $num_bishops = (int)@$counts[\ord('B')]; |
|
| 2168 | + |
|
| 2169 | + $num_knights = (int)@$counts[\ord('N')]; |
|
| 2170 | + |
|
| 2171 | + $num_pawns = (int)@$counts[\ord('P')]; |
|
| 2172 | + |
|
| 2173 | + return 0 == $num_queens && 0 == $num_rooks && ($num_bishops + $num_knights) <= 1 && 0 == $num_pawns; |
|
| 2174 | + } |
|
| 2175 | + |
|
| 2176 | + // -------------------------- |
|
| 2177 | + |
|
| 2178 | + // INCIDENTAL PRIVATE METHODS |
|
| 2179 | + |
|
| 2180 | + // -------------------------- |
|
| 2181 | + |
|
| 2182 | + // These functions don't really need to be class methods, since they don't access class properties. |
|
| 2183 | + |
|
| 2184 | + // They're placed within the class only for name-scoping. |
|
| 2185 | + |
|
| 2186 | + /** |
|
| 2187 | + * Convert board coordinates [a-h][1-8] to board index [0..63] |
|
| 2188 | + * |
|
| 2189 | + * @param string $coord Example: 'b3' |
|
| 2190 | + * @return int Example: 17 |
|
| 2191 | + * |
|
| 2192 | + * @access private |
|
| 2193 | + */ |
|
| 2194 | + public function boardCoordToIndex($coord) |
|
| 2195 | + { |
|
| 2196 | + //echo $coord," --> "; |
|
| 2197 | + |
|
| 2198 | + switch ($coord[0]) { |
|
| 2199 | + case 'a': |
|
| 2200 | + $x = 0; |
|
| 2201 | + break; |
|
| 2202 | + case 'b': |
|
| 2203 | + $x = 1; |
|
| 2204 | + break; |
|
| 2205 | + case 'c': |
|
| 2206 | + $x = 2; |
|
| 2207 | + break; |
|
| 2208 | + case 'd': |
|
| 2209 | + $x = 3; |
|
| 2210 | + break; |
|
| 2211 | + case 'e': |
|
| 2212 | + $x = 4; |
|
| 2213 | + break; |
|
| 2214 | + case 'f': |
|
| 2215 | + $x = 5; |
|
| 2216 | + break; |
|
| 2217 | + case 'g': |
|
| 2218 | + $x = 6; |
|
| 2219 | + break; |
|
| 2220 | + case 'h': |
|
| 2221 | + $x = 7; |
|
| 2222 | + break; |
|
| 2223 | + default: |
|
| 2224 | + return 64; /* erronous coord */ |
|
| 2225 | + } |
|
| 2226 | + |
|
| 2227 | + $y = $coord[1] - 1; |
|
| 2228 | + |
|
| 2229 | + if ($y < 0 || $y > 7) { |
|
| 2230 | + return 64; |
|
| 2231 | + } /* erronous coord */ |
|
| 2232 | + |
|
| 2233 | + return $y * 8 + $x; |
|
| 2234 | + //echo "$index | "; |
|
| 2235 | + } |
|
| 2236 | + |
|
| 2237 | + /** |
|
| 2238 | + * Convert board index [0..63] to board coordinates [a-h][1-8]. |
|
| 2239 | + * |
|
| 2240 | + * @param int $index Example: 17 |
|
| 2241 | + * @return string Example: 'b3' |
|
| 2242 | + * |
|
| 2243 | + * @access private |
|
| 2244 | + */ |
|
| 2245 | + public function boardIndexToCoord($index) |
|
| 2246 | + { |
|
| 2247 | + //echo $index," --> "; |
|
| 2248 | + |
|
| 2249 | + if ($index < 0 || $index > 63) { |
|
| 2250 | + return ''; |
|
| 2251 | + } |
|
| 2252 | + |
|
| 2253 | + $y = \floor($index / 8) + 1; |
|
| 2254 | + |
|
| 2255 | + $x = \chr(($index % 8) + 97); |
|
| 2256 | + |
|
| 2257 | + return "$x$y"; |
|
| 2258 | + } |
|
| 2259 | + |
|
| 2260 | + /** |
|
| 2261 | + * Get piece name from piece symbol. |
|
| 2262 | + * |
|
| 2263 | + * @param string $short Piece symbol |
|
| 2264 | + * @return string Piece name |
|
| 2265 | + * |
|
| 2266 | + * @access private |
|
| 2267 | + */ |
|
| 2268 | + public function getFullFigureName($short) |
|
| 2269 | + { |
|
| 2270 | + static $names = [ |
|
| 2271 | + 'K' => _MD_CHESS_MOVE_KING, |
|
| 2272 | + 'Q' => _MD_CHESS_MOVE_QUEEN, |
|
| 2273 | + 'R' => _MD_CHESS_MOVE_ROOK, |
|
| 2274 | + 'B' => _MD_CHESS_MOVE_BISHOP, |
|
| 2275 | + 'N' => _MD_CHESS_MOVE_KNIGHT, |
|
| 2276 | + 'P' => _MD_CHESS_MOVE_PAWN, |
|
| 2277 | + ]; |
|
| 2278 | + |
|
| 2279 | + return $names[$short] ?? _MD_CHESS_MOVE_EMPTY; |
|
| 2280 | + } |
|
| 2281 | + |
|
| 2282 | + /** |
|
| 2283 | + * Get tiles adjacent to specified tile. |
|
| 2284 | + * |
|
| 2285 | + * @param int $fig_pos |
|
| 2286 | + * @return array |
|
| 2287 | + * |
|
| 2288 | + * @access private |
|
| 2289 | + */ |
|
| 2290 | + public function getAdjTiles($fig_pos) |
|
| 2291 | + { |
|
| 2292 | + $adj_tiles = []; |
|
| 2293 | + |
|
| 2294 | + $i = 0; |
|
| 2295 | + |
|
| 2296 | + $x = $fig_pos % 8; |
|
| 2297 | + |
|
| 2298 | + $y = \floor($fig_pos / 8); |
|
| 2299 | + |
|
| 2300 | + if ($x > 0 && $y > 0) { |
|
| 2301 | + $adj_tiles[$i++] = $fig_pos - 9; |
|
| 2302 | + } |
|
| 2303 | + |
|
| 2304 | + if ($y > 0) { |
|
| 2305 | + $adj_tiles[$i++] = $fig_pos - 8; |
|
| 2306 | + } |
|
| 2307 | + |
|
| 2308 | + if ($x < 7 && $y > 0) { |
|
| 2309 | + $adj_tiles[$i++] = $fig_pos - 7; |
|
| 2310 | + } |
|
| 2311 | + |
|
| 2312 | + if ($x < 7) { |
|
| 2313 | + $adj_tiles[$i++] = $fig_pos + 1; |
|
| 2314 | + } |
|
| 2315 | + |
|
| 2316 | + if ($x < 7 && $y < 7) { |
|
| 2317 | + $adj_tiles[$i++] = $fig_pos + 9; |
|
| 2318 | + } |
|
| 2319 | + |
|
| 2320 | + if ($y < 7) { |
|
| 2321 | + $adj_tiles[$i++] = $fig_pos + 8; |
|
| 2322 | + } |
|
| 2323 | + |
|
| 2324 | + if ($x > 0 && $y < 7) { |
|
| 2325 | + $adj_tiles[$i++] = $fig_pos + 7; |
|
| 2326 | + } |
|
| 2327 | + |
|
| 2328 | + if ($x > 0) { |
|
| 2329 | + $adj_tiles[$i++] = $fig_pos - 1; |
|
| 2330 | + } |
|
| 2331 | + |
|
| 2332 | + /* DEBUG: foreach( $adj_tiles as $tile ) |
|
| 2333 | 2333 | echo "adj: $tile "; */ |
| 2334 | 2334 | |
| 2335 | - return $adj_tiles; |
|
| 2336 | - } |
|
| 2335 | + return $adj_tiles; |
|
| 2336 | + } |
|
| 2337 | 2337 | } // class ChessGame |
| 2338 | 2338 | |
| 2339 | 2339 | ?> |
@@ -300,10 +300,10 @@ discard block |
||
| 300 | 300 | || ('-' != $this->gamestate['fen_en_passant_target_square'] && 6 == $this->gamestate['fen_en_passant_target_square'][1] && 'w' != $this->gamestate['fen_active_color'])) { |
| 301 | 301 | return _MD_CHESS_FENBAD_EP_COLOR; // en passant target square wrong color |
| 302 | 302 | } elseif ('-' != $this->gamestate['fen_en_passant_target_square'] && 3 == $this->gamestate['fen_en_passant_target_square'][1] |
| 303 | - && 'wP' != $this->board[$this->boardCoordToIndex($this->gamestate['fen_en_passant_target_square'][0] . '4')]) { |
|
| 303 | + && 'wP' != $this->board[$this->boardCoordToIndex($this->gamestate['fen_en_passant_target_square'][0].'4')]) { |
|
| 304 | 304 | return _MD_CHESS_FENBAD_EP_NO_PAWN; // en passant target square for nonexistent pawn |
| 305 | 305 | } elseif ('-' != $this->gamestate['fen_en_passant_target_square'] && 6 == $this->gamestate['fen_en_passant_target_square'][1] |
| 306 | - && 'bP' != $this->board[$this->boardCoordToIndex($this->gamestate['fen_en_passant_target_square'][0] . '5')]) { |
|
| 306 | + && 'bP' != $this->board[$this->boardCoordToIndex($this->gamestate['fen_en_passant_target_square'][0].'5')]) { |
|
| 307 | 307 | return _MD_CHESS_FENBAD_EP_NO_PAWN; // en passant target square for nonexistent pawn |
| 308 | 308 | } |
| 309 | 309 | |
@@ -1876,7 +1876,7 @@ discard block |
||
| 1876 | 1876 | if ('P' == $fig_type && 16 == \abs($fig_pos - $dest_pos)) { |
| 1877 | 1877 | $file_chars = 'abcdefgh'; |
| 1878 | 1878 | |
| 1879 | - $this->gamestate['fen_en_passant_target_square'] = $file_chars[$fig_pos % 8] . ('w' == $cur_player ? '3' : '6'); |
|
| 1879 | + $this->gamestate['fen_en_passant_target_square'] = $file_chars[$fig_pos % 8].('w' == $cur_player ? '3' : '6'); |
|
| 1880 | 1880 | } else { |
| 1881 | 1881 | // clear 'en passant' |
| 1882 | 1882 | |
@@ -1904,7 +1904,7 @@ discard block |
||
| 1904 | 1904 | |
| 1905 | 1905 | $this->board[$dest_pos] = "$cur_player$pawn_upg"; |
| 1906 | 1906 | |
| 1907 | - $result .= ' ... ' . $this->move_msg(_MD_CHESS_MOVE_PROMOTED, $this->getFullFigureName($pawn_upg)); |
|
| 1907 | + $result .= ' ... '.$this->move_msg(_MD_CHESS_MOVE_PROMOTED, $this->getFullFigureName($pawn_upg)); |
|
| 1908 | 1908 | } |
| 1909 | 1909 | } |
| 1910 | 1910 | |
@@ -1933,27 +1933,27 @@ discard block |
||
| 1933 | 1933 | |
| 1934 | 1934 | $history_move .= '#'; |
| 1935 | 1935 | |
| 1936 | - $result .= ' ... ' . _MD_CHESS_MOVE_CHECKMATE; |
|
| 1936 | + $result .= ' ... '._MD_CHESS_MOVE_CHECKMATE; |
|
| 1937 | 1937 | } else { |
| 1938 | 1938 | $history_move .= '+'; |
| 1939 | 1939 | } |
| 1940 | 1940 | } elseif ($this->isStaleMate($cur_opp, $cur_player)) { |
| 1941 | 1941 | $this->gamestate['pgn_result'] = '1/2-1/2'; |
| 1942 | 1942 | |
| 1943 | - $result .= ' ... ' . _MD_CHESS_MOVE_STALEMATE; |
|
| 1943 | + $result .= ' ... '._MD_CHESS_MOVE_STALEMATE; |
|
| 1944 | 1944 | |
| 1945 | 1945 | $comment = _MD_CHESS_DRAW_STALEMATE; |
| 1946 | 1946 | } elseif ($this->insufficient_mating_material()) { |
| 1947 | 1947 | $this->gamestate['pgn_result'] = '1/2-1/2'; |
| 1948 | 1948 | |
| 1949 | - $result .= ' ... ' . _MD_CHESS_MOVE_MATERIAL; |
|
| 1949 | + $result .= ' ... '._MD_CHESS_MOVE_MATERIAL; |
|
| 1950 | 1950 | |
| 1951 | 1951 | $comment = _MD_CHESS_DRAW_NO_MATE; |
| 1952 | 1952 | } |
| 1953 | 1953 | |
| 1954 | 1954 | // store possible castling-availability modification |
| 1955 | 1955 | |
| 1956 | - $KQkq = ($white_may_castle_short ? 'K' : '') . ($white_may_castle_long ? 'Q' : '') . ($black_may_castle_short ? 'k' : '') . ($black_may_castle_long ? 'q' : ''); |
|
| 1956 | + $KQkq = ($white_may_castle_short ? 'K' : '').($white_may_castle_long ? 'Q' : '').($black_may_castle_short ? 'k' : '').($black_may_castle_long ? 'q' : ''); |
|
| 1957 | 1957 | |
| 1958 | 1958 | $this->gamestate['fen_castling_availability'] = !empty($KQkq) ? $KQkq : '-'; |
| 1959 | 1959 | |
@@ -1972,20 +1972,20 @@ discard block |
||
| 1972 | 1972 | $this->gamestate['pgn_movetext'] .= ' '; |
| 1973 | 1973 | } |
| 1974 | 1974 | |
| 1975 | - $this->gamestate['pgn_movetext'] .= $this->gamestate['fen_fullmove_number'] . '.'; |
|
| 1975 | + $this->gamestate['pgn_movetext'] .= $this->gamestate['fen_fullmove_number'].'.'; |
|
| 1976 | 1976 | // if black move, no moves yet, and game is setup, output move number with special '...' terminator |
| 1977 | 1977 | } elseif (empty($this->gamestate['pgn_movetext']) && !empty($this->gamestate['pgn_fen'])) { |
| 1978 | - $this->gamestate['pgn_movetext'] .= $this->gamestate['fen_fullmove_number'] . '...'; |
|
| 1978 | + $this->gamestate['pgn_movetext'] .= $this->gamestate['fen_fullmove_number'].'...'; |
|
| 1979 | 1979 | } |
| 1980 | 1980 | |
| 1981 | 1981 | // update movetext |
| 1982 | 1982 | |
| 1983 | 1983 | // comment is added only for a concluded game |
| 1984 | 1984 | |
| 1985 | - $this->gamestate['pgn_movetext'] .= ' ' . $history_move . ' ' . $this->gamestate['pgn_result']; |
|
| 1985 | + $this->gamestate['pgn_movetext'] .= ' '.$history_move.' '.$this->gamestate['pgn_result']; |
|
| 1986 | 1986 | |
| 1987 | 1987 | if (!empty($comment)) { |
| 1988 | - $this->gamestate['pgn_movetext'] .= ' {' . $comment . '}'; |
|
| 1988 | + $this->gamestate['pgn_movetext'] .= ' {'.$comment.'}'; |
|
| 1989 | 1989 | } |
| 1990 | 1990 | |
| 1991 | 1991 | // if black move, increment move-number |
@@ -2100,9 +2100,9 @@ discard block |
||
| 2100 | 2100 | $coordinates = $this->boardIndexToCoord($i); |
| 2101 | 2101 | |
| 2102 | 2102 | if ('w' == $tile[0]) { |
| 2103 | - $this->w_figures[] = $tile[1] . $coordinates; |
|
| 2103 | + $this->w_figures[] = $tile[1].$coordinates; |
|
| 2104 | 2104 | } elseif ('b' == $tile[0]) { |
| 2105 | - $this->b_figures[] = $tile[1] . $coordinates; |
|
| 2105 | + $this->b_figures[] = $tile[1].$coordinates; |
|
| 2106 | 2106 | } |
| 2107 | 2107 | } |
| 2108 | 2108 | |
@@ -2144,7 +2144,7 @@ discard block |
||
| 2144 | 2144 | |
| 2145 | 2145 | // Then replace each string of x's with the string length. |
| 2146 | 2146 | |
| 2147 | - $this->gamestate['fen_piece_placement'] = \preg_replace_callback('/(x+)/', static function($matches) {return \strlen($matches[1]);}, \implode('/', $rows)); |
|
| 2147 | + $this->gamestate['fen_piece_placement'] = \preg_replace_callback('/(x+)/', static function($matches) {return \strlen($matches[1]); }, \implode('/', $rows)); |
|
| 2148 | 2148 | } |
| 2149 | 2149 | |
| 2150 | 2150 | /** |
@@ -2160,15 +2160,15 @@ discard block |
||
| 2160 | 2160 | |
| 2161 | 2161 | $counts = \count_chars($pieces, 1); |
| 2162 | 2162 | |
| 2163 | - $num_queens = (int)@$counts[\ord('Q')]; |
|
| 2163 | + $num_queens = (int) @$counts[\ord('Q')]; |
|
| 2164 | 2164 | |
| 2165 | - $num_rooks = (int)@$counts[\ord('R')]; |
|
| 2165 | + $num_rooks = (int) @$counts[\ord('R')]; |
|
| 2166 | 2166 | |
| 2167 | - $num_bishops = (int)@$counts[\ord('B')]; |
|
| 2167 | + $num_bishops = (int) @$counts[\ord('B')]; |
|
| 2168 | 2168 | |
| 2169 | - $num_knights = (int)@$counts[\ord('N')]; |
|
| 2169 | + $num_knights = (int) @$counts[\ord('N')]; |
|
| 2170 | 2170 | |
| 2171 | - $num_pawns = (int)@$counts[\ord('P')]; |
|
| 2171 | + $num_pawns = (int) @$counts[\ord('P')]; |
|
| 2172 | 2172 | |
| 2173 | 2173 | return 0 == $num_queens && 0 == $num_rooks && ($num_bishops + $num_knights) <= 1 && 0 == $num_pawns; |
| 2174 | 2174 | } |
