/**
* Returns the total brightness of all lights in a {@link LightGrid}
* @param LightGrid $grid
* @return int total brightness
*/
public static function totalBrightness(LightGrid $grid)
{
$sum = 0;
foreach ($grid->getGrid() as $row) {
$sum += array_sum($row);
}
return $sum;
}
/**
* Runs a single {@link LightInstruction} on a {@link LightGrid} applying the
* {@link LightInstructionActionBehavior} rules on each light.
*
* @param LightGrid $lightGrid
* @param LightInstruction $instruction
* @param LightInstructionActionBehavior $actionBehavior
*/
public static function run(LightGrid $lightGrid, LightInstruction $instruction, LightInstructionActionBehavior $actionBehavior)
{
$grid = $lightGrid->getGrid();
$action = $instruction->getAction();
$coordinates = $instruction->getCoordinatePair();
$start = $coordinates[0];
$end = $coordinates[1];
$minY = min($start->getY(), $end->getY());
$yRange = abs($end->getY() - $start->getY()) + 1;
for ($x = min($start->getX(), $end->getX()); $x <= max($start->getX(), $end->getX()); $x++) {
$lights = array_slice($grid[$x], $minY, $yRange);
$lights = array_map($actionBehavior->behaviorForAction($action), $lights);
array_splice($grid[$x], $minY, $yRange, $lights);
}
$lightGrid->setGrid($grid);
}