tleckie / design-patterns
PHP design patterns
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Requires
- php: ^8
Requires (Dev)
- phpunit/phpunit: ^9.5
This package is auto-updated.
Last update: 2024-10-11 14:57:25 UTC
README
Memento:
<?php use Tleckie\DesignPatterns\Memento\History; use Tleckie\DesignPatterns\Memento\Originator; use Tleckie\DesignPatterns\Memento\State; $originator = new Originator(new State('Name 1', 'value 1')); $historic = new History($originator); $originator->state()->name(); // 'Name 1' $originator->changeState(new State('Name 1', 'value 1')); $historic->save(); $originator->changeState(new State('Name 2', 'value 2')); $originator->state()->name(); // 'Name 2' $historic->undo(); $originator->state()->name(); // 'Name 1' $historic->undo(); $originator->state()->name(); // 'Name 1'
State:
<?php use Tleckie\DesignPatterns\State\Car; use Tleckie\DesignPatterns\State\OffState; use Exception; $car = new Car(new OffState()); $car->isOn(); // false try{ $car->turnOff(); // trow Exception }catch(Exception $exception){ } $car->turnOn(); // OnState $car->isOn(); // true $car->speedUp(); //SpeedUpState
Strategy:
<?php use Tleckie\DesignPatterns\Strategy\Context; use Tleckie\DesignPatterns\Strategy\Terms; use Tleckie\DesignPatterns\Strategy\MultiplyStrategy; use Tleckie\DesignPatterns\Strategy\DivisionStrategy; use Tleckie\DesignPatterns\Strategy\SumStrategy; $context = new Context(new MultiplyStrategy); $terms = new Terms(6,3); $context->execute($terms); // 18 $context->changeStrategy(new DivisionStrategy)->execute($terms); // 2 $context->changeStrategy(new SumStrategy)->execute($terms); // 9
Chain of Responsibility:
<?php use Tleckie\DesignPatterns\ChainResponsibility\DivisionOperation; use Tleckie\DesignPatterns\ChainResponsibility\SumOperation; use Tleckie\DesignPatterns\ChainResponsibility\SubtractionOperation; use Tleckie\DesignPatterns\ChainResponsibility\Operation; $divisionOperationHandler = new DivisionOperation(); $divisionOperationHandler ->next(new SumOperation()) ->next(new SubtractionOperation()); $divisionOperationHandler->handle(new Operation('SUBTRACTION', 10,2)); // 8 $divisionOperationHandler->handle(new Operation('DIVISION', 10,2)); // 5 $divisionOperationHandler->handle(new Operation('SUM', 10,2)); // 12 $divisionOperationHandler->handle(new Operation('INVALID', 10,2)); // null
Decorator:
<?php use Tleckie\DesignPatterns\Decorator\NullNormalize; use Tleckie\DesignPatterns\Decorator\LowerNormalize; use Tleckie\DesignPatterns\Decorator\TextNormalize; use Tleckie\DesignPatterns\Decorator\SpacingNormalize; $decorator = new SpacingNormalize( new LowerNormalize( new TextNormalize( new NullNormalize ) ) ); $text = 'SAME random TEXT!'; $decorator->normalize($text); // same-random-text!