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<?php |
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namespace Clearcode\CommandBusConsole; |
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class CommandReflection |
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{ |
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/** @var string */ |
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public $commandName; |
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/** @var string */ |
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public $commandClass; |
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/** |
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* @param $commandName |
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* @param $commandClass |
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*/ |
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public function __construct($commandName, $commandClass) |
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{ |
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$this->commandName = $commandName; |
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$this->commandClass = $commandClass; |
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} |
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/** |
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* @param $className |
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* |
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* @return CommandReflection |
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*/ |
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public static function fromClass($className) |
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{ |
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$reflection = new \ReflectionClass($className); |
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return new self($reflection->getShortName(), $className); |
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} |
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/** |
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* @return \ReflectionParameter[] |
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*/ |
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public function parameters() |
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{ |
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$commandReflection = new \ReflectionClass($this->commandClass); |
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return $commandParameters = $commandReflection->getConstructor() ? |
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$commandReflection->getConstructor()->getParameters() : |
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[]; |
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} |
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/** |
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* @param array $arguments |
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* @param ArgumentsProcessor $argumentsProcessor |
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* |
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* @return object |
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* |
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* @throws InvalidCommandArgument |
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* @throws MissingCommandArgument |
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*/ |
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public function createCommand(array $arguments, ArgumentsProcessor $argumentsProcessor) |
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{ |
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$classReflection = new \ReflectionClass($this->commandClass); |
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$inputArguments = $argumentsProcessor->process($arguments); |
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$arrayDivide = function (array $array, callable $predicate) { |
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return [ |
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array_filter($array, function ($value, $key) use ($predicate) { return $predicate($key, $value); }, ARRAY_FILTER_USE_BOTH), |
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array_filter($array, function ($value, $key) use ($predicate) { return !$predicate($key, $value); }, ARRAY_FILTER_USE_BOTH), |
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]; |
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}; |
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$isKeyInteger = function ($key) { |
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return is_integer($key); |
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}; |
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list($orderedArguments, $namedArguments) = $arrayDivide($inputArguments, $isKeyInteger); |
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$constructorArguments = []; |
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foreach ($this->parameters() as $commandArgument) { |
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$argument = array_key_exists($commandArgument->getName(), $namedArguments) ? |
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$namedArguments[$commandArgument->getName()] : |
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array_shift($orderedArguments); |
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if (null === $argument) { |
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throw new MissingCommandArgument( |
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sprintf("Missing argument %s for '%s' command.", $commandArgument->getPosition() + 1, $this->commandName) |
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); |
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} |
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if (null !== $commandArgument->getClass()) { |
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$argumentClass = $commandArgument->getClass()->getName(); |
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if (!$argument instanceof $argumentClass) { |
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throw new InvalidCommandArgument( |
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sprintf( |
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"Invalid argument for '%s' command. Expected parameter %s to be instance of '%s'.", |
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$this->commandName, |
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$commandArgument->getPosition() + 1, |
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$argumentClass |
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) |
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); |
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} |
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} |
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$constructorArguments[$commandArgument->getPosition()] = $argument; |
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} |
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return $classReflection->newInstanceArgs($constructorArguments); |
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} |
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} |
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This check looks for variable assignements that are either overwritten by other assignments or where the variable is not used subsequently.
Both the
$myVar
assignment in line 1 and the$higher
assignment in line 2 are dead. The first because$myVar
is never used and the second because$higher
is always overwritten for every possible time line.