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<?php |
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declare(strict_types=1); |
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namespace Marcosh\PhpValidationDSL\Result; |
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use Closure; |
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use function Marcosh\PhpValidationDSL\curry; |
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use ReflectionFunction; |
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use Webmozart\Assert\Assert; |
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/** |
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* @param callable $f with signature (T1 $a1, T2 $a2, ...) -> T |
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* @return Closure with signature (ValidationResult T1, ValidationResult T2, ...) -> ValidationResult T |
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* |
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* @psalm-return Closure(): ValidationResult |
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*/ |
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function lift(callable $f): Closure |
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{ |
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$innerLift = |
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/** |
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* @return Closure |
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* |
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* @psalm-return Closure(): ValidationResult |
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*/ |
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static function ( |
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callable $f, |
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?int $numberOfParameters = null, |
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array $parameters = [] |
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) use (&$innerLift): Closure { |
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if (null === $numberOfParameters) { |
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// retrieve number of parameters from reflection |
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$fClosure = Closure::fromCallable($f); |
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$fRef = new ReflectionFunction($fClosure); |
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$numberOfParameters = $fRef->getNumberOfParameters(); |
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} |
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/** @return ValidationResult|Closure */ |
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/** @psalm-suppress MissingClosureReturnType */ |
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return static function () use ($f, $numberOfParameters, $parameters, $innerLift) { |
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// collect all necessary parameters |
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/** @var array<int, mixed> $newParameters */ |
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$newParameters = array_merge($parameters, func_get_args()); |
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if (count($newParameters) >= $numberOfParameters) { |
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if ([] === $newParameters) { |
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return ValidationResult::valid($f()); |
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} |
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$firstParameter = $newParameters[0]; |
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$result = $firstParameter->map(curry($f)); |
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foreach (array_slice($newParameters, 1) as $validatedParameter) { |
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$result = $validatedParameter->apply($result); |
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} |
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return $result; |
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} |
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return $innerLift($f, $numberOfParameters, $newParameters); |
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}; |
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}; |
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return $innerLift($f); |
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} |
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/** |
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* @param callable[] $fs every function takes as arguments the unwrapped results of the previous one and returns a |
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* ValidationResult |
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* @return ValidationResult |
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*/ |
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function sdo(callable ...$fs): ValidationResult |
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{ |
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Assert::notEmpty($fs, 'do_ must receive at least one callable'); |
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$result = ValidationResult::valid(null); |
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foreach ($fs as $f) { |
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$result = $result->bind($f); |
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} |
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return $result; |
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} |
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final class DoPartialTempResult |
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{ |
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/** |
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* @var callable |
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*/ |
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private $f; |
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/** |
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* @var array |
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*/ |
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private $arguments; |
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private function __construct(callable $f, array $arguments) |
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{ |
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$this->f = $f; |
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$this->arguments = $arguments; |
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} |
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public static function fromCallableAndArguments(callable $f, array $arguments): ValidationResult |
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{ |
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return ValidationResult::valid(new self($f, $arguments)); |
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} |
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public static function fromPreviousAndCallable(ValidationResult $previous, callable $f): ValidationResult |
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{ |
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return $previous->bind(function (DoPartialTempResult $doPartialTempResult) use ($f): ValidationResult { |
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$lastArgumentResult = $doPartialTempResult(); |
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/** @psalm-suppress MissingClosureParamType */ |
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return $lastArgumentResult->bind(function ($lastArgument) use ($doPartialTempResult, $f): ValidationResult { |
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$fArguments = array_merge($doPartialTempResult->arguments, [$lastArgument]); |
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return self::fromCallableAndArguments($f, $fArguments); |
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}); |
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}); |
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} |
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public function __invoke(): ValidationResult |
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{ |
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return call_user_func_array($this->f, $this->arguments); |
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} |
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} |
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/** |
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* @param callable[] $fs every function takes as arguments the unwrapped results of the previous one and returns a |
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* ValidationResult |
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* @return ValidationResult |
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*/ |
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function mdo(callable ...$fs): ValidationResult |
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{ |
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Assert::notEmpty($fs, 'do__ must receive at least one callable'); |
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$doPartialTempResult = DoPartialTempResult::fromCallableAndArguments($fs[0], []); |
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foreach (array_slice($fs, 1) as $f) { |
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$doPartialTempResult = DoPartialTempResult::fromPreviousAndCallable($doPartialTempResult, $f); |
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} |
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return $doPartialTempResult->bind(function (DoPartialTempResult $doPartialTempResult): ValidationResult { |
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return $doPartialTempResult(); |
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}); |
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} |
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marcosh /
php-validation-dsl
