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<?php |
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namespace JMGQ\AStar\Example\Terrain; |
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class TerrainCost |
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{ |
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public const INFINITE = PHP_INT_MAX; |
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/** @var int[][] */ |
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private array $terrainCost; |
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/** |
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* @param int[][] $terrainCost |
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*/ |
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public function __construct(array $terrainCost) |
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{ |
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if (self::isEmpty($terrainCost)) { |
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throw new \InvalidArgumentException('The terrain costs array is empty'); |
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} |
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53 |
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if (!self::isRectangular($terrainCost)) { |
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throw new \InvalidArgumentException('The terrain costs array is not rectangular'); |
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} |
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$terrainCost = self::convertToNumericArray($terrainCost); |
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$this->terrainCost = self::validateTerrainCosts($terrainCost); |
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} |
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public function getCost(int $row, int $column): int |
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{ |
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if (!isset($this->terrainCost[$row][$column])) { |
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throw new \InvalidArgumentException("Invalid tile: $row, $column"); |
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} |
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return $this->terrainCost[$row][$column]; |
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} |
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public function getTotalRows(): int |
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{ |
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return count($this->terrainCost); |
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} |
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22 |
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public function getTotalColumns(): int |
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{ |
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return count($this->terrainCost[0]); |
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} |
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/** |
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* @param int[][] $terrainCost |
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* @return bool |
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*/ |
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private static function isEmpty(array $terrainCost): bool |
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{ |
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if (!empty($terrainCost)) { |
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$firstRow = reset($terrainCost); |
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return empty($firstRow); |
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} |
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1 |
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return true; |
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} |
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/** |
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* @param mixed[][] $terrain |
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* @return int[][] |
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*/ |
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private static function validateTerrainCosts(array $terrain): array |
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{ |
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$validTerrain = []; |
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foreach ($terrain as $row => $rowValues) { |
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/** @psalm-suppress MixedAssignment PSalm is unable to determine that $value is of mixed type */ |
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foreach ($rowValues as $column => $value) { |
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$integerValue = filter_var($value, FILTER_VALIDATE_INT); |
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if ($integerValue === false) { |
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throw new \InvalidArgumentException('Invalid terrain cost: ' . print_r($value, true)); |
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} |
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$validTerrain[$row][$column] = $integerValue; |
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} |
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} |
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return $validTerrain; |
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} |
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/** |
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* @param int[][] $associativeArray |
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* @return int[][] |
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*/ |
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private static function convertToNumericArray(array $associativeArray): array |
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{ |
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$numericArray = []; |
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foreach ($associativeArray as $row) { |
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$numericArray[] = array_values($row); |
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} |
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return $numericArray; |
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} |
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/** |
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* @param int[][] $terrain |
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* @return bool |
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106
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*/ |
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private static function isRectangular(array $terrain): bool |
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{ |
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// @phpstan-ignore-next-line reset won't return false as we have already checked that the terrain is not empty |
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53 |
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$numberOfColumnsInFirstRow = count(reset($terrain)); |
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112
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53 |
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foreach ($terrain as $row) { |
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53 |
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if (count($row) !== $numberOfColumnsInFirstRow) { |
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3 |
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return false; |
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115
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} |
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} |
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50 |
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return true; |
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} |
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} |
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jmgq /
php-a-star
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