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<?php |
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declare(strict_types=1); |
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namespace Artack\Color; |
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use Artack\Color\Color\Color; |
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use Artack\Color\Transition\TransitionInterface; |
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use Webmozart\Assert\Assert; |
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class Transition |
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{ |
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/** @var TransitionInterface[] */ |
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private $transitions = []; |
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/** @var Converter */ |
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private $converter; |
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/** |
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* @param TransitionInterface[] $transitions |
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* @param Converter $converter |
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*/ |
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public function __construct(array $transitions, Converter $converter) |
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{ |
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foreach ($transitions as $transition) { |
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$this->addTransition($transition); |
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} |
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$this->converter = $converter; |
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} |
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private function addTransition(TransitionInterface $transition) |
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{ |
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$this->transitions[] = $transition; |
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} |
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public function interpolate(string $fqcn, Color $startColor, Color $endColor, float $value, float $max): Color |
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{ |
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Assert::greaterThanEq($max, 0, 'max needs to be 0 or greater'); |
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Assert::range($value, 0, $max, 'value needs to be in the range of 0 to max'); |
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Assert::lessThanEq($value, $max, 'value needs to be less or equal than max'); |
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if (get_class($startColor) !== $fqcn) { |
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$startColor = $this->converter->convert($startColor, $fqcn); |
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} |
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if (get_class($endColor) !== $fqcn) { |
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$endColor = $this->converter->convert($endColor, $fqcn); |
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} |
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return $this->getTransition($fqcn)->interpolate($startColor, $endColor, $value, $max); |
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} |
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private function getTransition(string $fqcn): TransitionInterface |
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{ |
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foreach ($this->transitions as $transition) { |
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if ($transition->supports($fqcn)) { |
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return $transition; |
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} |
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} |
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throw new \RuntimeException('no transition found getTransition'); |
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} |
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} |
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ARTACK /
color
