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PluginManager: Separate listener method filtering to its own method

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this makes registerEvents() easier to read.
This commit is contained in:
Dylan K. Taylor 2021-06-27 20:05:01 +01:00
parent db28358316
commit 5cdf0b169f
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GPG Key ID: 8927471A91CAFD3D
1 changed files with 68 additions and 49 deletions
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117
src/plugin/PluginManager.php
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@ -437,6 +437,47 @@ class PluginManager{
$this->fileAssociations = [];
}
/**
* Returns whether the given ReflectionMethod could be used as an event handler. Used to filter methods on Listeners
* when registering.
*
* Note: This DOES NOT validate the listener annotations; if this method returns false, the method will be ignored
* completely. Invalid annotations on candidate listener methods should result in an error, so those aren't checked
* here.
*
* @phpstan-return class-string<Event>|null
*/
private function getEventsHandledBy(\ReflectionMethod $method) : ?string{
if($method->isStatic() or !$method->getDeclaringClass()->implementsInterface(Listener::class)){
return null;
}
$tags = Utils::parseDocComment((string) $method->getDocComment());
if(isset($tags[ListenerMethodTags::NOT_HANDLER])){
return null;
}
$parameters = $method->getParameters();
if(count($parameters) !== 1){
return null;
}
$paramType = $parameters[0]->getType();
//isBuiltin() returns false for builtin classes ..................
if(!$paramType instanceof \ReflectionNamedType || $paramType->isBuiltin()){
return null;
}
/** @phpstan-var class-string $paramClass */
$paramClass = $paramType->getName();
$eventClass = new \ReflectionClass($paramClass);
if(!$eventClass->isSubclassOf(Event::class)){
return null;
}
/** @var \ReflectionClass<Event> $eventClass */
return $eventClass->getName();
}
/**
* Registers all the events in the given Listener class
*
@ -449,56 +490,34 @@ class PluginManager{
$reflection = new \ReflectionClass(get_class($listener));
foreach($reflection->getMethods(\ReflectionMethod::IS_PUBLIC) as $method){
if(!$method->isStatic() and $method->getDeclaringClass()->implementsInterface(Listener::class)){
$tags = Utils::parseDocComment((string) $method->getDocComment());
if(isset($tags[ListenerMethodTags::NOT_HANDLER])){
continue;
}
$parameters = $method->getParameters();
if(count($parameters) !== 1){
continue;
}
$paramType = $parameters[0]->getType();
//isBuiltin() returns false for builtin classes ..................
if($paramType instanceof \ReflectionNamedType && !$paramType->isBuiltin()){
/** @phpstan-var class-string $paramClass */
$paramClass = $paramType->getName();
$eventClass = new \ReflectionClass($paramClass);
if(!$eventClass->isSubclassOf(Event::class)){
continue;
}
}else{
continue;
}
$handlerClosure = $method->getClosure($listener);
if($handlerClosure === null) throw new AssumptionFailedError("This should never happen");
try{
$priority = isset($tags[ListenerMethodTags::PRIORITY]) ? EventPriority::fromString($tags[ListenerMethodTags::PRIORITY]) : EventPriority::NORMAL;
}catch(\InvalidArgumentException $e){
throw new PluginException("Event handler " . Utils::getNiceClosureName($handlerClosure) . "() declares invalid/unknown priority \"" . $tags[ListenerMethodTags::PRIORITY] . "\"");
}
$handleCancelled = false;
if(isset($tags[ListenerMethodTags::HANDLE_CANCELLED])){
switch(strtolower($tags[ListenerMethodTags::HANDLE_CANCELLED])){
case "true":
case "":
$handleCancelled = true;
break;
case "false":
break;
default:
throw new PluginException("Event handler " . Utils::getNiceClosureName($handlerClosure) . "() declares invalid @" . ListenerMethodTags::HANDLE_CANCELLED . " value \"" . $tags[ListenerMethodTags::HANDLE_CANCELLED] . "\"");
}
}
/** @phpstan-var \ReflectionClass<Event> $eventClass */
$this->registerEvent($eventClass->getName(), $handlerClosure, $priority, $plugin, $handleCancelled);
$tags = Utils::parseDocComment((string) $method->getDocComment());
if(isset($tags[ListenerMethodTags::NOT_HANDLER]) || ($eventClass = $this->getEventsHandledBy($method)) === null){
continue;
}
$handlerClosure = $method->getClosure($listener);
if($handlerClosure === null) throw new AssumptionFailedError("This should never happen");
try{
$priority = isset($tags[ListenerMethodTags::PRIORITY]) ? EventPriority::fromString($tags[ListenerMethodTags::PRIORITY]) : EventPriority::NORMAL;
}catch(\InvalidArgumentException $e){
throw new PluginException("Event handler " . Utils::getNiceClosureName($handlerClosure) . "() declares invalid/unknown priority \"" . $tags[ListenerMethodTags::PRIORITY] . "\"");
}
$handleCancelled = false;
if(isset($tags[ListenerMethodTags::HANDLE_CANCELLED])){
switch(strtolower($tags[ListenerMethodTags::HANDLE_CANCELLED])){
case "true":
case "":
$handleCancelled = true;
break;
case "false":
break;
default:
throw new PluginException("Event handler " . Utils::getNiceClosureName($handlerClosure) . "() declares invalid @" . ListenerMethodTags::HANDLE_CANCELLED . " value \"" . $tags[ListenerMethodTags::HANDLE_CANCELLED] . "\"");
}
}
$this->registerEvent($eventClass, $handlerClosure, $priority, $plugin, $handleCancelled);
}
}