/
EventsExtension.php
500 lines (423 loc) · 14.9 KB
/
EventsExtension.php
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<?php
/**
* This file is part of the Kdyby (http://www.kdyby.org)
*
* Copyright (c) 2008 Filip Procházka (filip@prochazka.su)
*
* For the full copyright and license information, please view the file license.md that was distributed with this source code.
*/
namespace Kdyby\Events\DI;
use Doctrine\Common\EventSubscriber;
use Kdyby\Events\Diagnostics\Panel;
use Kdyby\Events\Event;
use Kdyby\Events\EventManager;
use Kdyby\Events\LazyEventManager;
use Kdyby\Events\Subscriber;
use Kdyby\Events\SymfonyDispatcher;
use Nette\Configurator;
use Nette\DI\Compiler;
use Nette\DI\Config\Helpers;
use Nette\DI\Container as DIContainer;
use Nette\DI\ContainerBuilder as DIContainerBuilder;
use Nette\DI\Definitions\AccessorDefinition;
use Nette\DI\Definitions\Definition;
use Nette\DI\Definitions\FactoryDefinition;
use Nette\DI\Definitions\ImportedDefinition;
use Nette\DI\Definitions\Reference;
use Nette\DI\Definitions\ServiceDefinition;
use Nette\DI\Definitions\Statement;
use Nette\DI\Helpers as DIHelpers;
use Nette\PhpGenerator\ClassType as ClassTypeGenerator;
use Nette\PhpGenerator\Helpers as GeneratorHelpers;
use Nette\PhpGenerator\PhpLiteral;
use Nette\Reflection\ClassType as ClassTypeReflection;
use Nette\Utils\Validators;
use ReflectionProperty;
use Symfony\Component\EventDispatcher\Event as SymfonyEvent;
use Symfony\Component\EventDispatcher\EventDispatcherInterface;
class EventsExtension extends \Nette\DI\CompilerExtension
{
/** @deprecated */
const EVENT_TAG = self::TAG_EVENT;
/** @deprecated */
const SUBSCRIBER_TAG = self::TAG_SUBSCRIBER;
const TAG_EVENT = 'kdyby.event';
const TAG_SUBSCRIBER = 'kdyby.subscriber';
const PANEL_COUNT_MODE = 'count';
/**
* @var array
*/
public $defaults = [
'subscribers' => [],
'validate' => TRUE,
'autowire' => TRUE,
'optimize' => TRUE,
'debugger' => '%debugMode%',
'exceptionHandler' => NULL,
'globalDispatchFirst' => FALSE,
];
/**
* @var array
*/
private $loadedConfig;
/**
* @var array
*/
private $listeners = [];
/**
* @var array
*/
private $allowedManagerSetup = [];
public function loadConfiguration()
{
$this->listeners = [];
$this->allowedManagerSetup = [];
$builder = $this->getContainerBuilder();
/** @var array $config */
$config = Helpers::merge($this->getConfig(), $this->defaults);
/** @var array $userConfig */
$userConfig = $this->getConfig();
if (!array_key_exists('debugger', $userConfig)) {
if (in_array(php_sapi_name(), ['cli', 'phpdbg'], TRUE)) {
$config['debugger'] = FALSE; // disable by default in CLI
} elseif (!$config['debugger']) {
$config['debugger'] = self::PANEL_COUNT_MODE;
}
}
$evm = $builder->addDefinition($this->prefix('manager'))
->setType(EventManager::class);
if ($config['debugger']) {
$defaults = ['dispatchTree' => FALSE, 'dispatchLog' => TRUE, 'events' => TRUE, 'listeners' => FALSE];
if (is_array($config['debugger'])) {
$config['debugger'] = Helpers::merge($config['debugger'], $defaults);
} else {
$config['debugger'] = $config['debugger'] !== self::PANEL_COUNT_MODE;
}
$evm->addSetup('?::register(?, ?)->renderPanel = ?', [new PhpLiteral(Panel::class), '@self', '@container', $config['debugger']]);
}
if ($config['exceptionHandler'] !== NULL) {
$evm->addSetup('setExceptionHandler', $this->filterArgs($config['exceptionHandler']));
}
Validators::assertField($config, 'subscribers', 'array');
foreach ($config['subscribers'] as $i => $subscriber) {
$def = $builder->addDefinition($this->prefix('subscriber.' . $i));
$def->setFactory(DIHelpers::filterArguments([
is_string($subscriber) ? new Statement($subscriber) : $subscriber,
])[0]);
/** @var string $subscriberClass */
$subscriberClass = $def->getEntity();
if (class_exists($subscriberClass)) {
$def->setType($subscriberClass);
}
$def->setAutowired(FALSE);
$def->addTag(self::TAG_SUBSCRIBER);
}
if (class_exists(SymfonyEvent::class)) {
$builder->addDefinition($this->prefix('symfonyProxy'))
->setClass(EventDispatcherInterface::class)
->setFactory(SymfonyDispatcher::class);
}
$this->loadedConfig = $config;
}
public function beforeCompile()
{
$builder = $this->getContainerBuilder();
$config = $this->loadedConfig;
/** @var \Nette\DI\Definitions\ServiceDefinition $manager */
$manager = $builder->getDefinition($this->prefix('manager'));
foreach (array_keys($builder->findByTag(self::TAG_SUBSCRIBER)) as $serviceName) {
$manager->addSetup('addEventSubscriber', ['@' . $serviceName]);
}
Validators::assertField($config, 'validate', 'bool');
if ($config['validate']) {
$this->validateSubscribers($builder, $manager);
}
Validators::assertField($config, 'autowire', 'bool');
if ($config['autowire']) {
Validators::assertField($config, 'globalDispatchFirst', 'bool');
$this->autowireEvents($builder);
}
Validators::assertField($config, 'optimize', 'bool');
if ($config['optimize']) {
if (!$config['validate']) {
throw new \Kdyby\Events\InvalidStateException('Cannot optimize without validation.');
}
$this->optimizeListeners($builder);
}
}
public function afterCompile(ClassTypeGenerator $class)
{
$init = $class->getMethod('initialize');
/** @hack This tries to add the event invokation right after the code, generated by NetteExtension. */
$foundNetteInitStart = $foundNetteInitEnd = FALSE;
$lines = explode(";\n", trim($init->getBody() ?: ''));
$init->setBody(NULL);
while (($line = array_shift($lines)) !== NULL) {
if ($foundNetteInitStart && !$foundNetteInitEnd &&
stripos($line, 'Nette\\') === FALSE && stripos($line, 'set_include_path') === FALSE && stripos($line, 'date_default_timezone_set') === FALSE
) {
$init->addBody(GeneratorHelpers::format(
'$this->getService(?)->createEvent(?)->dispatch($this);',
$this->prefix('manager'),
[DIContainer::class, 'onInitialize']
));
$foundNetteInitEnd = TRUE;
}
if (!$foundNetteInitEnd && (
stripos($line, 'Nette\\') !== FALSE || stripos($line, 'set_include_path') !== FALSE || stripos($line, 'date_default_timezone_set') !== FALSE
)) {
$foundNetteInitStart = TRUE;
}
$init->addBody($line . ';');
}
if (!$foundNetteInitEnd) {
$init->addBody(GeneratorHelpers::format(
'$this->getService(?)->createEvent(?)->dispatch($this);',
$this->prefix('manager'),
[DIContainer::class, 'onInitialize']
));
}
}
/**
* @param \Nette\DI\ContainerBuilder $builder
* @param \Nette\DI\ServiceDefinition $manager
* @throws \Nette\Utils\AssertionException
*/
private function validateSubscribers(DIContainerBuilder $builder, Definition $manager)
{
foreach ($manager->getSetup() as $stt) {
if ($stt->getEntity() !== 'addEventSubscriber') {
$this->allowedManagerSetup[] = $stt;
continue;
}
try {
$argument = reset($stt->arguments);
if ($argument instanceof Reference) {
$serviceName = $argument->getValue();
$def = $builder->getDefinition($serviceName);
} elseif ($argument instanceof Statement) {
$entity = $argument->getEntity();
if ($entity instanceof Definition) {
$serviceName = $entity->getName();
} elseif ($entity instanceof Reference) {
$serviceName = $entity->getValue();
} elseif (is_array($entity)) {
$serviceName = $entity[0];
} else {
$serviceName = (string) $entity;
}
$def = $builder->getDefinition($serviceName);
} else {
$serviceName = ltrim($argument, '@');
$def = $builder->getDefinition($serviceName);
}
} catch (\Exception $e) {
throw new \Nette\Utils\AssertionException(
sprintf(
'Please, do not register listeners directly to service %s. Use section "%s: subscribers: ", or tag the service as "%s".',
$this->prefix('@manager'),
$this->name,
self::TAG_SUBSCRIBER
),
0,
$e
);
}
$defClass = $def->getType();
if (!$defClass) {
throw new \Nette\Utils\AssertionException(
sprintf(
'Please, specify existing class for %sservice @%s explicitly, and make sure, that the class exists and can be autoloaded.',
is_numeric($serviceName) ? 'anonymous ' : '',
$serviceName
)
);
}
if (!class_exists($defClass)) {
throw new \Nette\Utils\AssertionException(
sprintf(
'Class %s of %sservice @%s cannot be found. Please make sure, that the class exists and can be autoloaded.',
$defClass,
is_numeric($serviceName) ? 'anonymous ' : '',
$serviceName
)
);
}
if (!in_array(EventSubscriber::class, class_implements($defClass), TRUE)) {
// the minimum is Doctrine EventSubscriber, but recommend is Kdyby Subscriber
throw new \Nette\Utils\AssertionException(sprintf('Subscriber @%s doesn\'t implement %s.', $serviceName, Subscriber::class));
}
$eventNames = [];
$listenerInst = self::createEventSubscriberInstanceWithoutConstructor($defClass);
foreach ($listenerInst->getSubscribedEvents() as $eventName => $params) {
if (is_numeric($eventName) && is_string($params)) { // [EventName, ...]
[, $method] = Event::parseName($params);
$eventNames[] = ltrim($params, '\\');
if (!method_exists($listenerInst, $method)) {
throw new \Nette\Utils\AssertionException(sprintf('Event listener %s::%s() is not implemented.', $defClass, $method));
}
} elseif (is_string($eventName)) { // [EventName => ???, ...]
$eventNames[] = ltrim($eventName, '\\');
if (is_string($params)) { // [EventName => method, ...]
if (!method_exists($listenerInst, $params)) {
throw new \Nette\Utils\AssertionException(sprintf('Event listener %s::%s() is not implemented.', $defClass, $params));
}
} elseif (is_string($params[0])) { // [EventName => [method, priority], ...]
if (!method_exists($listenerInst, $params[0])) {
throw new \Nette\Utils\AssertionException(sprintf('Event listener %s::%s() is not implemented.', $defClass, $params[0]));
}
} else {
foreach ($params as $listener) { // [EventName => [[method, priority], ...], ...]
if (!method_exists($listenerInst, $listener[0])) {
throw new \Nette\Utils\AssertionException(sprintf('Event listener %s::%s() is not implemented.', $defClass, $listener[0]));
}
}
}
}
}
$this->listeners[$serviceName] = array_unique($eventNames);
}
}
private function isAlias(Definition $definition)
{
if ($definition instanceof ServiceDefinition) {
return $definition->getFactory()->getEntity() !== NULL && (
$definition->getFactory()->getEntity() instanceof Reference
|| (is_string($definition->getEntity()) && substr($definition->getEntity(), 0, 1) === '@')
);
}
return FALSE;
}
/**
* @param \Nette\DI\ContainerBuilder $builder
*/
private function autowireEvents(DIContainerBuilder $builder)
{
foreach ($builder->getDefinitions() as $def) {
if ($def instanceof ImportedDefinition) {
continue;
}
/** @var \Nette\DI\Definitions\ServiceDefinition $def */
if ($this->isAlias($def)) {
continue; // alias
}
$class = $def->getType();
if ($class === NULL || !class_exists($class)) {
if ($def instanceof AccessorDefinition) {
continue;
}
if ($def instanceof FactoryDefinition && $def->getResultDefinition()->getFactory()->getEntity() === NULL) {
continue;
}
if ($def instanceof FactoryDefinition) {
$entity = $def->getResultDefinition()->getEntity();
$class = $entity instanceof Definition ? $entity->getType() : $entity;
} elseif ($def instanceof ServiceDefinition) {
/** @var string $class */
$class = $def->getEntity();
} else {
continue;
}
if (is_array($class)) {
continue;
}
if ($class === NULL || !class_exists($class)) {
continue;
}
}
if ($def instanceof AccessorDefinition || $def instanceof ImportedDefinition) {
continue;
}
$this->bindEventProperties($def, ClassTypeReflection::from($class));
}
}
protected function bindEventProperties(Definition $def, ClassTypeReflection $class)
{
/** @var \Nette\DI\Definitions\ServiceDefinition $def */
$def = $def instanceof FactoryDefinition ? $def->getResultDefinition() : $def;
foreach ($class->getProperties(ReflectionProperty::IS_PUBLIC) as $property) {
$name = $property->getName();
if (!preg_match('#^on[A-Z]#', $name)) {
continue;
}
if ($property->hasAnnotation('persistent') || $property->hasAnnotation('inject')) { // definitely not an event
continue;
}
$def->addSetup('$' . $name, [
new Statement($this->prefix('@manager') . '::createEvent', [
[$class->getName(), $name],
new PhpLiteral('$service->' . $name),
NULL,
$property->hasAnnotation('globalDispatchFirst')
? (bool) $property->getAnnotation('globalDispatchFirst')
: $this->loadedConfig['globalDispatchFirst'],
]),
]);
}
}
/**
* @param \Nette\DI\ContainerBuilder $builder
*/
private function optimizeListeners(DIContainerBuilder $builder)
{
$listeners = [];
foreach ($this->listeners as $serviceName => $eventNames) {
foreach ($eventNames as $eventName) {
[$namespace, $event] = Event::parseName($eventName);
$listeners[$eventName][] = $serviceName;
if (!$namespace || !class_exists($namespace)) {
continue; // it might not even be a "classname" event namespace
}
// find all subclasses and register the listener to all the classes dispatching them
foreach ($builder->getDefinitions() as $def) {
$class = $def->getClass();
if (!$class) {
continue; // ignore unresolved classes
}
if (is_subclass_of($class, $namespace)) {
$listeners[sprintf('%s::%s', $class, $event)][] = $serviceName;
}
}
}
}
foreach ($listeners as $id => $subscribers) {
$listeners[$id] = array_unique($subscribers);
}
/** @var \Nette\DI\Definitions\ServiceDefinition $manager */
$manager = $builder->getDefinition($this->prefix('manager'));
$manager->setFactory(LazyEventManager::class, [$listeners])
->setSetup($this->allowedManagerSetup);
}
/**
* @param string|\stdClass $statement
* @return \Nette\DI\Statement[]
*/
private function filterArgs($statement)
{
return DIHelpers::filterArguments([is_string($statement) ? new Statement($statement) : $statement]);
}
/**
* @param \Nette\Configurator $configurator
*/
public static function register(Configurator $configurator)
{
$configurator->onCompile[] = static function ($config, Compiler $compiler) {
$compiler->addExtension('events', new EventsExtension());
};
}
/**
* @param string|NULL $class
* @return \Doctrine\Common\EventSubscriber
*/
private static function createEventSubscriberInstanceWithoutConstructor($class)
{
if ($class === NULL) {
throw new \InvalidArgumentException('Given class cannot be NULL');
}
$instance = ClassTypeReflection::from($class)->newInstanceWithoutConstructor();
if (!$instance instanceof EventSubscriber) {
throw new \Kdyby\Events\UnexpectedValueException(sprintf('The class %s does not implement %s', $class, EventSubscriber::class));
}
return $instance;
}
}