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<?php |
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/** |
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* webtrees: online genealogy |
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* Copyright (C) 2018 webtrees development team |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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*/ |
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namespace Fisharebest\Webtrees; |
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use ReflectionClass; |
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use ReflectionMethod; |
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use ReflectionParameter; |
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/** |
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* Simple dependency injection. |
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*/ |
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class Resolver |
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{ |
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/** @var object[] */ |
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private $bindings = []; |
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/** |
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* For some classes (e.g. Request, Tree, User), we inject a specific instance |
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* of an object, rather than a newly instantiated object |
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* |
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* @param string $class |
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* @param object $object |
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*/ |
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public function bind(string $class, $object) |
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{ |
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$this->bindings[$class] = $object; |
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} |
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/** |
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* Create an instance of a class, injecting all its dependencies. |
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* |
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* @param string $class |
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* |
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* @return object |
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*/ |
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public function resolve(string $class) |
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{ |
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if (array_key_exists($class, $this->bindings)) { |
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return $this->bindings[$class]; |
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} |
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$reflector = new ReflectionClass($class); |
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$constructor = $reflector->getConstructor(); |
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// No constructor? Nothing to inject. |
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if ($constructor === null) { |
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return new $class; |
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} |
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$parameters = $this->resolveParameters($constructor->getParameters()); |
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return $reflector->newInstanceArgs($parameters); |
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} |
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/** |
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* Call an object's method, injecting all its dependencies. |
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* |
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* @param object $object |
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* @param string $method |
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* |
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* @return mixed |
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*/ |
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public function dispatch($object, string $method) |
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{ |
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$reflector = new ReflectionMethod($object, $method); |
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$parameters = $this->resolveParameters($reflector->getParameters()); |
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return $reflector->invoke($object, ...$parameters); |
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} |
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/** |
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* @param array $parameters |
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* |
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* @return array |
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*/ |
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private function resolveParameters(array $parameters): array |
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{ |
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return array_map(function (ReflectionParameter $parameter) { |
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return $this->resolve($parameter->getClass()->name); |
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}, $parameters); |
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} |
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} |
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fisharebest /
webtrees
