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| <?php | |
| /** | |
| * This file is a part of ChessBrowser. | |
| * | |
| * ChessBrowser is free software: you can redistribute it and/or modify | |
| * it under the terms of the GNU General Public License as published by | |
| * the Free Software Foundation, either version 3 of the License, or | |
| * (at your option) any later version. | |
| * | |
| * This program is distributed in the hope that it will be useful, | |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| * GNU General Public License for more details. | |
| * | |
| * You should have received a copy of the GNU General Public License | |
| * along with this program. If not, see <https://www.gnu.org/licenses/>. | |
| * | |
| * @file SquareRelations | |
| * @ingroup ChessBrowser | |
| * @author DannyS712 | |
| */ | |
| namespace MediaWiki\Extension\ChessBrowser; | |
| class SquareRelations { | |
| /** @var int */ | |
| private $square1; | |
| /** @var int */ | |
| private $square2; | |
| /** | |
| * Can be used, but for chaining ::new is probably better | |
| * | |
| * @param int $square1 Square as byte number where in Hex notation | |
| * the first four bits (0xF0) are rank [1-8] | |
| * and the second 4 bits (0x0F) are file [a-h] | |
| * @param int $square2 Square as byte number where in Hex notation | |
| * the first four bits (0xF0) are rank [1-8] | |
| * and the second 4 bits (0x0F) are file [a-h] | |
| */ | |
| public function __construct( int $square1, int $square2 ) { | |
| $this->square1 = $square1; | |
| $this->square2 = $square2; | |
| } | |
| /** | |
| * For chaining | |
| * | |
| * @param int $square1 | |
| * @param int $square2 | |
| * @return SquareRelations | |
| */ | |
| public static function new( int $square1, int $square2 ): SquareRelations { | |
| return new SquareRelations( $square1, $square2 ); | |
| } | |
| /** | |
| * Get the distance between 2 squares | |
| * @return int | |
| */ | |
| public function getDistance(): int { | |
| $sq1 = $this->square1; | |
| $sq2 = $this->square2; | |
| $rankDiff = abs( ( $sq1 & 0xF0 ) - ( $sq2 & 0XF0 ) ) >> 4; | |
| $fileDiff = abs( ( $sq1 & 0x07 ) - ( $sq2 & 0x07 ) ); | |
| return max( $rankDiff, $fileDiff ); | |
| } | |
| /** | |
| * Returns whether two squares are on the same rank. | |
| * @return bool | |
| */ | |
| public function haveSameRank(): bool { | |
| return ( $this->square1 & 0xF0 ) === ( $this->square2 & 0xF0 ); | |
| } | |
| /** | |
| * Returns whether two squares are on the same file | |
| * @return bool | |
| */ | |
| public function haveSameFile(): bool { | |
| return ( $this->square1 & 0x0F ) === ( $this->square2 & 0x0F ); | |
| } | |
| } |