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<?php |
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declare(strict_types=1); |
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namespace Stratadox\Hydration\Mapper; |
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use Stratadox\Hydration\Mapper\Instruction\Is; |
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use Stratadox\Hydration\Mapping\Properties; |
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use Stratadox\HydrationMapper\InstructsHowToMap; |
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use Stratadox\HydrationMapper\MakesMap; |
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use Stratadox\HydrationMapper\RepresentsChoice; |
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use Stratadox\Hydrator\Hydrates; |
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use Stratadox\Hydrator\MappedHydrator; |
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use Stratadox\Hydrator\OneOfTheseHydrators; |
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use Stratadox\Instantiator\CannotInstantiateThis; |
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use function array_map; |
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/** |
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* Builds a mapped hydrator, configured with mappings for the properties. |
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* |
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* @package Stratadox\Hydrate |
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* @author Stratadox |
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*/ |
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final class Mapper implements MakesMap |
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{ |
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/** @var string */ |
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private $name; |
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/** @var InstructsHowToMap[] */ |
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private $properties; |
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/** @var string|null */ |
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private $decisionKey; |
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/** @var RepresentsChoice[] */ |
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private $choices; |
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private function __construct( |
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string $name, |
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array $properties = [], |
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string $decisionKey = null, |
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array $choices = [] |
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) { |
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$this->name = $name; |
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$this->properties = $properties; |
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$this->decisionKey = $decisionKey; |
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$this->choices = $choices; |
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} |
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/** |
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* Creates a builder that produces a mapped hydrator for a class. |
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* |
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* @see MappedHydrator |
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* @param string $className The fully qualified name of the class to produce |
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* a mapped hydrator for. |
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* @return MakesMap The builder for the mapped hydrator. |
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*/ |
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public static function forThe(string $className): MakesMap |
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{ |
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return new self($className); |
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} |
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/** @inheritdoc */ |
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public function property( |
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string $property, |
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InstructsHowToMap $instruction = null |
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): MakesMap { |
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return new self($this->name, $this->add($property, $instruction)); |
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} |
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/** @inheritdoc */ |
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public function selectBy( |
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string $decisionKey, |
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array $choices |
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): MakesMap { |
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return new self('', [], $decisionKey, $choices); |
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} |
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/** @inheritdoc */ |
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public function finish(): Hydrates |
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{ |
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if (isset($this->decisionKey)) { |
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return OneOfTheseHydrators::decideBasedOnThe( |
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$this->decisionKey, |
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array_map(function (RepresentsChoice $choice): Hydrates { |
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return $choice->finish(); |
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}, $this->choices) |
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); |
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} |
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$class = $this->name; |
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$properties = []; |
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foreach ($this->properties as $name => $instruction) { |
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$properties[] = $instruction->followFor($name); |
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} |
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try { |
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return MappedHydrator::forThe($class, Properties::map(...$properties)); |
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} catch (CannotInstantiateThis $problem) { |
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throw NoSuchClass::couldNotLoad($class); |
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} |
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} |
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/** |
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* Adds a property to the mapper. |
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* |
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* @param string $property The name of the property. |
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* @param InstructsHowToMap|null $instruction The instruction to follow. |
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* @return InstructsHowToMap[] The map of properties to |
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* mapping instructions. |
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*/ |
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private function add( |
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string $property, |
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?InstructsHowToMap $instruction |
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): array { |
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return $this->properties + [$property => $instruction ?: Is::string()]; |
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} |
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} |
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Stratadox /
HydrationMapper
