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<?php |
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declare(strict_types=1); |
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namespace RulerZ\Spec; |
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use RulerZ\Exception\ParameterOverridenException; |
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/** |
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* @internal |
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*/ |
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class Composite implements Specification |
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{ |
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/** |
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* @var string |
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*/ |
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private $operator; |
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/** |
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* @var array |
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*/ |
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private $specifications = []; |
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/** |
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* Builds a composite specification. |
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* |
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* @param string $operator The operator used to join the specifications. |
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* @param array $specifications A list specifications to combine. |
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*/ |
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public function __construct($operator, array $specifications = []) |
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{ |
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$this->operator = $operator; |
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if (empty($specifications)) { |
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throw new \LogicException('No specifications given.'); |
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} |
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foreach ($specifications as $specification) { |
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$this->addSpecification($specification); |
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} |
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} |
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private function addSpecification(Specification $specification): void |
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{ |
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$this->specifications[] = $specification; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getRule(): string |
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{ |
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return implode(sprintf(' %s ', $this->operator), array_map(function (Specification $specification) { |
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return sprintf('(%s)', $specification->getRule()); |
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}, $this->specifications)); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getParameters(): array |
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{ |
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$parametersCount = 0; |
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$parametersList = array_map(function (Specification $specification) use (&$parametersCount) { |
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$parametersCount += count($specification->getParameters()); |
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return $specification->getParameters(); |
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}, $this->specifications); |
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$mergedParameters = array_merge([], ...$parametersList); |
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// error handling in case of overriden parameters |
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if ($parametersCount !== count($mergedParameters)) { |
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$overridenParameters = $this->searchOverridenParameters($parametersList); |
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$specificationsTypes = array_map(function (Specification $spec) { |
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return get_class($spec); |
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}, $this->specifications); |
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throw new ParameterOverridenException(sprintf( |
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'Looks like some parameters were overriden (%s) while combining specifications of types %s'."\n". |
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'More information on how to solve this can be found here: https://github.com/K-Phoen/rulerz/issues/3', |
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implode(', ', $overridenParameters), |
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implode(', ', $specificationsTypes) |
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)); |
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} |
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return $mergedParameters; |
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} |
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/** |
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* Search the parameters that were overridden during the parameters-merge phase. |
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* |
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* @return array Names of the overridden parameters. |
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*/ |
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private function searchOverridenParameters(array $parametersList): array |
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{ |
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$parametersUsageCount = []; |
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foreach ($parametersList as $list) { |
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foreach ($list as $parameter => $_value) { |
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if (!isset($parametersUsageCount[$parameter])) { |
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$parametersUsageCount[$parameter] = 0; |
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} |
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$parametersUsageCount[$parameter] += 1; |
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} |
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} |
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$overriddenParameters = array_filter($parametersUsageCount, function ($count) { |
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return $count > 1; |
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}); |
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return array_keys($overriddenParameters); |
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} |
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} |
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K-Phoen /
rulerz
