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| 1 | <?php |
| 2 | /** |
| 3 | * This file is a part of ChessBrowser. |
| 4 | * |
| 5 | * ChessBrowser is free software: you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation, either version 3 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program. If not, see <https://www.gnu.org/licenses/>. |
| 17 | * |
| 18 | * @file ChessSquare |
| 19 | * @ingroup ChessBrowser |
| 20 | * @author DannyS712 |
| 21 | */ |
| 22 | |
| 23 | namespace MediaWiki\Extension\ChessBrowser; |
| 24 | |
| 25 | class NotationAnalyzer { |
| 26 | |
| 27 | /** @var string */ |
| 28 | private $notation; |
| 29 | |
| 30 | /** |
| 31 | * @param string $notation |
| 32 | */ |
| 33 | public function __construct( string $notation ) { |
| 34 | $this->notation = $notation; |
| 35 | } |
| 36 | |
| 37 | /** |
| 38 | * Get the rank the piece started on |
| 39 | * |
| 40 | * @return int|null |
| 41 | */ |
| 42 | public function getFromRank() { |
| 43 | $notation = preg_replace( "/^.+(\d).+\d.*$/s", '$1', $this->notation ); |
| 44 | if ( strlen( $notation ) > 1 ) { |
| 45 | return null; |
| 46 | } |
| 47 | return ( (int)$notation - 1 ) * 16; |
| 48 | } |
| 49 | |
| 50 | /** |
| 51 | * Get the file the piece started on |
| 52 | * |
| 53 | * @return int|null |
| 54 | */ |
| 55 | public function getFromFile() { |
| 56 | $notation = preg_replace( "/^.*([a-h]).*[a-h].*$/s", '$1', $this->notation ); |
| 57 | if ( strlen( $notation ) > 1 ) { |
| 58 | return null; |
| 59 | } |
| 60 | return ChessSquare::FILE_TO_NUMBER[$notation]; |
| 61 | } |
| 62 | |
| 63 | /** |
| 64 | * Get the target square |
| 65 | * |
| 66 | * @return int|string |
| 67 | */ |
| 68 | public function getTargetSquare() { |
| 69 | $notation = preg_replace( "/.*([a-h][1-8]).*/s", '$1', $this->notation ); |
| 70 | try { |
| 71 | $square = ChessSquare::newFromCoords( $notation ); |
| 72 | return $square->getNumber(); |
| 73 | } catch ( ChessBrowserException ) { |
| 74 | return ''; |
| 75 | } |
| 76 | } |
| 77 | |
| 78 | /** |
| 79 | * Get the piece type making the move |
| 80 | * |
| 81 | * @param string $color |
| 82 | * @return int |
| 83 | */ |
| 84 | public function getPieceType( string $color ): int { |
| 85 | $notation = $this->notation; |
| 86 | if ( $notation === 'O-O-O' || $notation === 'O-O' ) { |
| 87 | $pieceType = 'K'; |
| 88 | } else { |
| 89 | $token = $notation[0]; |
| 90 | $pieceType = preg_match( "/[NRBQK]/", $token ) ? $token : 'P'; |
| 91 | } |
| 92 | $pieceType = ( new ChessPiece( $pieceType ) )->getAsHex(); |
| 93 | if ( $color === 'black' ) { |
| 94 | $pieceType += 8; |
| 95 | } |
| 96 | return $pieceType; |
| 97 | } |
| 98 | |
| 99 | /** |
| 100 | * Get the promotion |
| 101 | * |
| 102 | * If the notation token contains an equal sign then it's a promotion |
| 103 | * |
| 104 | * @return string |
| 105 | */ |
| 106 | public function getPromotion(): string { |
| 107 | $notation = $this->notation; |
| 108 | if ( strpos( $notation, '=' ) !== false ) { |
| 109 | $piece = preg_replace( "/^.*?=([QRBN]).*$/", '$1', $notation ); |
| 110 | return strtolower( $piece ); |
| 111 | } |
| 112 | |
| 113 | if ( preg_match( "/[a-h][18][NBRQ]/", $notation ) ) { |
| 114 | $notation = preg_replace( "/[^a-h18NBRQ]/s", "", $notation ); |
| 115 | return strtolower( $notation[-1] ); |
| 116 | } |
| 117 | return ''; |
| 118 | } |
| 119 | |
| 120 | } |