/**
* Loads the controller and initializes it. Runs the pre_controller,
* post_controller_constructor, and post_controller events. Triggers
* a system.404 event when the route cannot be mapped to a controller.
*
* This method is benchmarked as controller_setup and controller_execution.
*
* @return object instance of controller
*/
public static function &instance()
{
if (self::$instance === NULL) {
Benchmark::start(SYSTEM_BENCHMARK . '_controller_setup');
if (Router::$method[0] === '_') {
// Do not allow access to hidden methods
Event::run('system.404');
}
// Include the Controller file
require Router::$controller_path;
try {
// Start validation of the controller
$class = new ReflectionClass(ucfirst(Router::$controller) . '_Controller');
} catch (ReflectionException $e) {
// Controller does not exist
Event::run('system.404');
}
if ($class->isAbstract() or IN_PRODUCTION and $class->getConstant('ALLOW_PRODUCTION') == FALSE) {
// Controller is not allowed to run in production
Event::run('system.404');
}
// Run system.pre_controller
Event::run('system.pre_controller');
// Begin benchmark for the controller
Benchmark::f_start(ucfirst(Router::$controller) . '_Controller');
// Create a new controller instance
$controller = $class->newInstance();
// End benchmark for the controller
Benchmark::f_stop(ucfirst(Router::$controller) . '_Controller');
// Controller constructor has been executed
Event::run('system.post_controller_constructor');
try {
// Load the controller method
$method = $class->getMethod(Router::$method);
if ($method->isProtected() or $method->isPrivate()) {
// Do not attempt to invoke protected methods
throw new ReflectionException('protected controller method');
}
// Default arguments
$arguments = Router::$arguments;
} catch (ReflectionException $e) {
// Use __call instead
$method = $class->getMethod('__call');
// Use arguments in __call format
$arguments = array(Router::$method, Router::$arguments);
}
// Stop the controller setup benchmark
Benchmark::stop(SYSTEM_BENCHMARK . '_controller_setup');
// Start the controller execution benchmark
Benchmark::start(SYSTEM_BENCHMARK . '_controller_execution');
// Execute the controller method
$method->invokeArgs($controller, $arguments);
// Controller method has been executed
Event::run('system.post_controller');
// Stop the controller execution benchmark
Benchmark::stop(SYSTEM_BENCHMARK . '_controller_execution');
}
return self::$instance;
}
