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<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Bernhard Posselt <dev@bernhard-posselt.com>
* @author Christoph Wurst <christoph@winzerhof-wurst.at>
* @author Joas Schilling <coding@schilljs.com>
* @author Lukas Reschke <lukas@statuscode.ch>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Robin Appelman <robin@icewind.nl>
* @author Robin McCorkell <robin@mccorkell.me.uk>
* @author Roeland Jago Douma <roeland@famdouma.nl>
* @author Thomas Müller <thomas.mueller@tmit.eu>
*
* @license AGPL-3.0
*
* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
namespace OC\AppFramework\Utility;
use ArrayAccess;
use Closure;
use OCP\AppFramework\QueryException;
use OCP\IContainer;
use Pimple\Container;
use Psr\Container\ContainerInterface;
use ReflectionClass;
use ReflectionException;
use ReflectionParameter;
use function class_exists;
/**
* SimpleContainer is a simple implementation of a container on basis of Pimple
*/
class SimpleContainer implements ArrayAccess, ContainerInterface, IContainer {
/** @var Container */
private $container;
public function __construct() {
$this->container = new Container();
}
public function get(string $id) {
return $this->query($id);
}
public function has(string $id): bool {
// If a service is no registered but is an existing class, we can probably load it
return isset($this->container[$id]) || class_exists($id);
}
/**
* @param ReflectionClass $class the class to instantiate
* @return \stdClass the created class
* @suppress PhanUndeclaredClassInstanceof
*/
private function buildClass(ReflectionClass $class) {
$constructor = $class->getConstructor();
if ($constructor === null) {
return $class->newInstance();
}
return $class->newInstanceArgs(array_map(function (ReflectionParameter $parameter) {
$parameterType = $parameter->getType();
$resolveName = $parameter->getName();
// try to find out if it is a class or a simple parameter
if ($parameterType !== null && !$parameterType->isBuiltin()) {
$resolveName = $parameterType->getName();
}
try {
$builtIn = $parameter->hasType() && $parameter->getType()->isBuiltin();
return $this->query($resolveName, !$builtIn);
} catch (QueryException $e) {
// Service not found, use the default value when available
if ($parameter->isDefaultValueAvailable()) {
return $parameter->getDefaultValue();
}
if ($parameterType !== null && !$parameterType->isBuiltin()) {
$resolveName = $parameter->getName();
try {
return $this->query($resolveName);
} catch (QueryException $e2) {
// don't lose the error we got while trying to query by type
throw new QueryException($e2->getMessage(), (int) $e2->getCode(), $e);
}
}
throw $e;
}
}, $constructor->getParameters()));
}
public function resolve($name) {
$baseMsg = 'Could not resolve ' . $name . '!';
try {
$class = new ReflectionClass($name);
if ($class->isInstantiable()) {
return $this->buildClass($class);
} else {
throw new QueryException($baseMsg .
' Class can not be instantiated');
}
} catch (ReflectionException $e) {
throw new QueryException($baseMsg . ' ' . $e->getMessage());
}
}
public function query(string $name, bool $autoload = true) {
$name = $this->sanitizeName($name);
if (isset($this->container[$name])) {
return $this->container[$name];
}
if ($autoload) {
$object = $this->resolve($name);
$this->registerService($name, function () use ($object) {
return $object;
});
return $object;
}
throw new QueryException('Could not resolve ' . $name . '!');
}
/**
* @param string $name
* @param mixed $value
*/
public function registerParameter($name, $value) {
$this[$name] = $value;
}
/**
* The given closure is call the first time the given service is queried.
* The closure has to return the instance for the given service.
* Created instance will be cached in case $shared is true.
*
* @param string $name name of the service to register another backend for
* @param Closure $closure the closure to be called on service creation
* @param bool $shared
*/
public function registerService($name, Closure $closure, $shared = true) {
$wrapped = function () use ($closure) {
return $closure($this);
};
$name = $this->sanitizeName($name);
if (isset($this[$name])) {
unset($this[$name]);
}
if ($shared) {
$this[$name] = $wrapped;
} else {
$this[$name] = $this->container->factory($wrapped);
}
}
/**
* Shortcut for returning a service from a service under a different key,
* e.g. to tell the container to return a class when queried for an
* interface
* @param string $alias the alias that should be registered
* @param string $target the target that should be resolved instead
*/
public function registerAlias($alias, $target) {
$this->registerService($alias, function (ContainerInterface $container) use ($target) {
return $container->get($target);
}, false);
}
/*
* @param string $name
* @return string
*/
protected function sanitizeName($name) {
if (isset($name[0]) && $name[0] === '\\') {
return ltrim($name, '\\');
}
return $name;
}
/**
* @deprecated 20.0.0 use \Psr\Container\ContainerInterface::has
*/
public function offsetExists($id) {
return $this->container->offsetExists($id);
}
/**
* @deprecated 20.0.0 use \Psr\Container\ContainerInterface::get
*/
public function offsetGet($id) {
return $this->container->offsetGet($id);
}
/**
* @deprecated 20.0.0 use \OCP\IContainer::registerService
*/
public function offsetSet($id, $service) {
$this->container->offsetSet($id, $service);
}
/**
* @deprecated 20.0.0
*/
public function offsetUnset($offset) {
$this->container->offsetUnset($offset);
}
}
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