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<?php |
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namespace Sofa\Eloquence\Mutator; |
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use ReflectionException; |
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use ReflectionClass; |
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use ReflectionMethod; |
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use Illuminate\Support\Traits\Macroable; |
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use Sofa\Eloquence\Contracts\Mutator as MutatorContract; |
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class Mutator implements MutatorContract |
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{ |
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use Macroable; |
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/** |
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* Mutate value using provided methods. |
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* |
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* @param mixed $value |
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* @param string|array $callables |
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* @return mixed |
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* |
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* @throws \LogicException |
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*/ |
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public function mutate($value, $callables) |
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{ |
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if (!is_array($callables)) { |
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$callables = explode('|', $callables); |
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} |
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foreach ($callables as $callable) { |
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list($callable, $args) = $this->parse(trim($callable)); |
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$value = call_user_func_array($callable, array_merge([$value], $args)); |
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} |
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return $value; |
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} |
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/** |
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* Parse provided mutator functions. |
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* |
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* @param string $callable |
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* @return array |
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* |
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* @throws \Sofa\Eloquence\Mutator\InvalidCallableException |
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*/ |
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protected function parse($callable) |
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{ |
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list($callable, $args) = $this->parseArgs($callable); |
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if ($this->isClassMethod($callable)) { |
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$callable = $this->parseClassMethod($callable); |
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} elseif ($this->isMutatorMethod($callable)) { |
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$callable = [$this, $callable]; |
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} elseif (!function_exists($callable)) { |
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throw new InvalidCallableException("Function [{$callable}] not found."); |
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} |
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return [$callable, $args]; |
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} |
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/** |
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* Determine whether callable is a class method. |
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* |
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* @param string $callable |
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* @return boolean |
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*/ |
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protected function isClassMethod($callable) |
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{ |
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return strpos($callable, '@') !== false; |
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} |
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/** |
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* Determine whether callable is available on this instance. |
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* |
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* @param string $callable |
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* @return boolean |
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*/ |
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protected function isMutatorMethod($callable) |
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{ |
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return method_exists($this, $callable) || static::hasMacro($callable); |
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} |
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/** |
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* Split provided string into callable and arguments. |
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* |
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* @param string $callable |
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* @return array |
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*/ |
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protected function parseArgs($callable) |
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{ |
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$args = []; |
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if (strpos($callable, ':') !== false) { |
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list($callable, $argsString) = explode(':', $callable); |
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$args = explode(',', $argsString); |
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} |
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return [$callable, $args]; |
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} |
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/** |
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* Extract and validate class method. |
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* |
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* @param string $userCallable |
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* @return callable |
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* |
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* @throws \Sofa\Eloquence\Mutator\InvalidCallableException |
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*/ |
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protected function parseClassMethod($userCallable) |
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{ |
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list($class) = explode('@', $userCallable); |
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$callable = str_replace('@', '::', $userCallable); |
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try { |
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$method = new ReflectionMethod($callable); |
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$class = new ReflectionClass($class); |
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} catch (ReflectionException $e) { |
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throw new InvalidCallableException($e->getMessage()); |
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} |
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return ($method->isStatic()) ? $callable : $this->getInstanceMethod($class, $method); |
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} |
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/** |
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* Get instance callable. |
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* |
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* @param \ReflectionMethod $method |
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* @return callable |
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* |
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* @throws \Sofa\Eloquence\Mutator\InvalidCallableException |
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*/ |
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protected function getInstanceMethod(ReflectionClass $class, ReflectionMethod $method) |
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{ |
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if (!$method->isPublic()) { |
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throw new InvalidCallableException("Instance method [{$class}@{$method->getName()}] is not public."); |
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} |
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if (!$this->canInstantiate($class)) { |
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throw new InvalidCallableException("Can't instantiate class [{$class->getName()}]."); |
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} |
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return [$class->newInstance(), $method->getName()]; |
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} |
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/** |
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* Determine whether instance can be instantiated. |
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* |
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* @param \ReflectionClass $class |
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* @return boolean |
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*/ |
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protected function canInstantiate(ReflectionClass $class) |
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{ |
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if (!$class->isInstantiable()) { |
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return false; |
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} |
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$constructor = $class->getConstructor(); |
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return is_null($constructor) || 0 === $constructor->getNumberOfRequiredParameters(); |
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} |
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} |
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jarektkaczyk /
eloquence-mutable
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