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<?php
declare(strict_types=1);
class Grid implements Stringable
{
/**
* @param string[][] $data
*/
public function __construct(public array $data)
{
}
public function __toString(): string
{
$rowToLine = fn (array $row): string => array_reduce(
array: $row,
callback: fn (string $acc, string $character): string => $acc . $character,
initial: "",
);
return array_reduce(
array: $this->data,
callback: fn (string $acc, array $row): string => $acc . $rowToLine($row) . PHP_EOL,
initial: "",
);
}
public function getCharacterAtPosition(Position $position): string
{
if ($this->isInBounds($position)) {
return $this->data[$position->y][$position->x];
}
return ".";
}
/**
* @param Position[] $positions
*/
public function getStringFromPositions(array $positions): string
{
$characters = array_map(
callback: fn (Position $position): string => $this->getCharacterAtPosition($position),
array: $positions,
);
$string = array_reduce(
array: $characters,
callback: fn (string $acc, string $character): string => $acc . $character,
initial: "",
);
return $string;
}
public function isInBounds(Position $position): bool
{
if (!array_key_exists($position->y, $this->data)) {
return false;
}
if (!array_key_exists($position->x, $this->data[$position->y])) {
return false;
}
return true;
}
}
|
