/**
* Constructor
*
* @param \Chainnn\Chainable|object $object
* @param \Chainnn\ChainOfCommand|array $chainOfCommand
*
* @throws \Chainnn\Exception\RuntimeException
*/
public function __construct($object, $chainOfCommand = null)
{
if (!is_object($object)) {
throw new RuntimeException('Requires type object, got' . gettype($object));
}
$this->object = $object;
$this->methodList = array();
$reflection = new \ReflectionObject($object);
foreach ($reflection->getMethods(\ReflectionMethod::IS_PUBLIC) as $method) {
$isMagic = preg_match('/^_{2}/', $method->getName());
$chainableMethod = $method->getName() == 'getChainOfCommand';
if (!$isMagic && !$chainableMethod) {
$this->methodList[$method->getName()] = $method;
}
}
if (null === $chainOfCommand) {
if ($this->object instanceof Chainable) {
$chainOfCommand = $this->object->getChainOfCommand();
}
}
if (is_array($chainOfCommand)) {
$chainOfCommand = ChainOfCommand::createFromArrayMap($chainOfCommand);
}
if (!$chainOfCommand instanceof ChainOfCommand) {
throw new RuntimeException('Could not set a chain of command.');
}
$this->chainOfCommand = $chainOfCommand;
}
/**
* Chain of command usage tests.
*/
public function testChainOfCommand()
{
$chainOfCommand = ChainOfCommand::createFromArrayMap(array('methodOne' => array('childOne' => array('subOne' => array('subSubOne'))), 'methodTwo' => array('childTwo' => array('subTwo' => array('subSubTwo')))));
// method one
$methodOne = $chainOfCommand->findNextAvailableCommand('methodOne');
$this->assertNotNull($methodOne);
$chainOfCommand->setCurrentCommand($methodOne);
$childOne = $chainOfCommand->findNextAvailableCommand('childOne');
$this->assertNotNull($childOne);
$chainOfCommand->setCurrentCommand($childOne);
$subOne = $chainOfCommand->findNextAvailableCommand('subOne');
$this->assertNotNull($subOne);
$chainOfCommand->setCurrentCommand($subOne);
$subSubOne = $chainOfCommand->findNextAvailableCommand('subSubOne');
$this->assertNotNull($subSubOne);
// method two
$methodTwo = $chainOfCommand->findNextAvailableCommand('methodTwo');
$this->assertNotNull($methodTwo);
$chainOfCommand->setCurrentCommand($methodTwo);
$childTwo = $chainOfCommand->findNextAvailableCommand('childTwo');
$this->assertNotNull($childTwo);
$chainOfCommand->setCurrentCommand($childTwo);
$subTwo = $chainOfCommand->findNextAvailableCommand('subTwo');
$this->assertNotNull($subTwo);
$chainOfCommand->setCurrentCommand($subTwo);
$subSubTwo = $chainOfCommand->findNextAvailableCommand('subSubTwo');
$this->assertNotNull($subSubTwo);
$chainOfCommand->setCurrentCommand($subSubTwo);
// try accessing another base commands child
$this->assertNull($chainOfCommand->findNextAvailableCommand('childOne'));
$this->assertNull($chainOfCommand->findNextAvailableCommand('subOne'));
$this->assertNull($chainOfCommand->findNextAvailableCommand('subSubOne'));
// try bubbling up
$this->assertNotNull($chainOfCommand->findNextAvailableCommand('methodTwo'));
$this->assertNotNull($chainOfCommand->findNextAvailableCommand('childTwo'));
$this->assertNotNull($chainOfCommand->findNextAvailableCommand('subTwo'));
}
/**
* This magic method will catch any commands on the chain of command and
* invoke them, creating the chaining mechanism.
*
* @param string $method
* @param array $params
* @return \Chainnn\Chain|mixed
*
* @throws \Chainnn\Exception\RuntimeException
*/
public function __call($method, array $params)
{
if (!$this->object) {
throw new RuntimeException('No object set on chain.');
}
if (!$this->chainOfCommand) {
throw new RuntimeException('No chain of command set.');
}
$command = $this->chainOfCommand->findNextAvailableCommand($method);
if (!$command) {
throw new RuntimeException("{$method}() is not available on the chain.");
}
if ($command->willReturnToBase() || $command->willEndChain()) {
$this->chainOfCommand->setCurrentCommand();
} else {
$this->chainOfCommand->setCurrentCommand($command);
}
if (!array_key_exists($method, $this->methodList)) {
throw new RuntimeException("No method {$method}() exists on the object.");
}
$methodReflection = $this->methodList[$method];
$result = $methodReflection->invokeArgs($this->object, $params);
return $command->willEndChain() ? $result : $this;
}
