diff vendor/symfony/dependency-injection/Compiler/AutowirePass.php @ 0:4c8ae668cc8c

Initial import (non-working)

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/symfony/dependency-injection/Compiler/AutowirePass.php	Wed Nov 29 16:09:58 2017 +0000
@@ -0,0 +1,392 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <[e-mail]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\DependencyInjection\Compiler;
+
+use Symfony\Component\DependencyInjection\Config\AutowireServiceResource;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Definition;
+use Symfony\Component\DependencyInjection\Exception\RuntimeException;
+use Symfony\Component\DependencyInjection\Reference;
+
+/**
+ * Guesses constructor arguments of services definitions and try to instantiate services if necessary.
+ *
+ * @author Kévin Dunglas <[e-mail]>
+ */
+class AutowirePass implements CompilerPassInterface
+{
+    private $container;
+    private $reflectionClasses = array();
+    private $definedTypes = array();
+    private $types;
+    private $ambiguousServiceTypes = array();
+    private $autowired = array();
+
+    /**
+     * {@inheritdoc}
+     */
+    public function process(ContainerBuilder $container)
+    {
+        $throwingAutoloader = function ($class) { throw new \ReflectionException(sprintf('Class %s does not exist', $class)); };
+        spl_autoload_register($throwingAutoloader);
+
+        try {
+            $this->container = $container;
+            foreach ($container->getDefinitions() as $id => $definition) {
+                if ($definition->isAutowired()) {
+                    $this->completeDefinition($id, $definition);
+                }
+            }
+        } finally {
+            spl_autoload_unregister($throwingAutoloader);
+
+            // Free memory and remove circular reference to container
+            $this->reflectionClasses = array();
+            $this->definedTypes = array();
+            $this->types = null;
+            $this->ambiguousServiceTypes = array();
+            $this->autowired = array();
+        }
+    }
+
+    /**
+     * Creates a resource to help know if this service has changed.
+     *
+     * @param \ReflectionClass $reflectionClass
+     *
+     * @return AutowireServiceResource
+     */
+    public static function createResourceForClass(\ReflectionClass $reflectionClass)
+    {
+        $metadata = array();
+
+        if ($constructor = $reflectionClass->getConstructor()) {
+            $metadata['__construct'] = self::getResourceMetadataForMethod($constructor);
+        }
+
+        foreach (self::getSetters($reflectionClass) as $reflectionMethod) {
+            $metadata[$reflectionMethod->name] = self::getResourceMetadataForMethod($reflectionMethod);
+        }
+
+        return new AutowireServiceResource($reflectionClass->name, $reflectionClass->getFileName(), $metadata);
+    }
+
+    /**
+     * Wires the given definition.
+     *
+     * @param string     $id
+     * @param Definition $definition
+     *
+     * @throws RuntimeException
+     */
+    private function completeDefinition($id, Definition $definition)
+    {
+        if ($definition->getFactory()) {
+            throw new RuntimeException(sprintf('Service "%s" can use either autowiring or a factory, not both.', $id));
+        }
+
+        if (!$reflectionClass = $this->getReflectionClass($id, $definition)) {
+            return;
+        }
+
+        if ($this->container->isTrackingResources()) {
+            $this->container->addResource(static::createResourceForClass($reflectionClass));
+        }
+
+        if (!$constructor = $reflectionClass->getConstructor()) {
+            return;
+        }
+        $parameters = $constructor->getParameters();
+        if (method_exists('ReflectionMethod', 'isVariadic') && $constructor->isVariadic()) {
+            array_pop($parameters);
+        }
+
+        $arguments = $definition->getArguments();
+        foreach ($parameters as $index => $parameter) {
+            if (array_key_exists($index, $arguments) && '' !== $arguments[$index]) {
+                continue;
+            }
+
+            try {
+                if (!$typeHint = $parameter->getClass()) {
+                    if (isset($arguments[$index])) {
+                        continue;
+                    }
+
+                    // no default value? Then fail
+                    if (!$parameter->isOptional()) {
+                        throw new RuntimeException(sprintf('Unable to autowire argument index %d ($%s) for the service "%s". If this is an object, give it a type-hint. Otherwise, specify this argument\'s value explicitly.', $index, $parameter->name, $id));
+                    }
+
+                    // specifically pass the default value
+                    $arguments[$index] = $parameter->getDefaultValue();
+
+                    continue;
+                }
+
+                if (isset($this->autowired[$typeHint->name])) {
+                    $arguments[$index] = $this->autowired[$typeHint->name] ? new Reference($this->autowired[$typeHint->name]) : null;
+                    continue;
+                }
+
+                if (null === $this->types) {
+                    $this->populateAvailableTypes();
+                }
+
+                if (isset($this->types[$typeHint->name])) {
+                    $value = new Reference($this->types[$typeHint->name]);
+                } else {
+                    try {
+                        $value = $this->createAutowiredDefinition($typeHint, $id);
+                    } catch (RuntimeException $e) {
+                        if ($parameter->isDefaultValueAvailable()) {
+                            $value = $parameter->getDefaultValue();
+                        } elseif ($parameter->allowsNull()) {
+                            $value = null;
+                        } else {
+                            throw $e;
+                        }
+                        $this->autowired[$typeHint->name] = false;
+                    }
+                }
+            } catch (\ReflectionException $e) {
+                // Typehint against a non-existing class
+
+                if (!$parameter->isDefaultValueAvailable()) {
+                    throw new RuntimeException(sprintf('Cannot autowire argument %s for %s because the type-hinted class does not exist (%s).', $index + 1, $definition->getClass(), $e->getMessage()), 0, $e);
+                }
+
+                $value = $parameter->getDefaultValue();
+            }
+
+            $arguments[$index] = $value;
+        }
+
+        if ($parameters && !isset($arguments[++$index])) {
+            while (0 <= --$index) {
+                $parameter = $parameters[$index];
+                if (!$parameter->isDefaultValueAvailable() || $parameter->getDefaultValue() !== $arguments[$index]) {
+                    break;
+                }
+                unset($arguments[$index]);
+            }
+        }
+
+        // it's possible index 1 was set, then index 0, then 2, etc
+        // make sure that we re-order so they're injected as expected
+        ksort($arguments);
+        $definition->setArguments($arguments);
+    }
+
+    /**
+     * Populates the list of available types.
+     */
+    private function populateAvailableTypes()
+    {
+        $this->types = array();
+
+        foreach ($this->container->getDefinitions() as $id => $definition) {
+            $this->populateAvailableType($id, $definition);
+        }
+    }
+
+    /**
+     * Populates the list of available types for a given definition.
+     *
+     * @param string     $id
+     * @param Definition $definition
+     */
+    private function populateAvailableType($id, Definition $definition)
+    {
+        // Never use abstract services
+        if ($definition->isAbstract()) {
+            return;
+        }
+
+        foreach ($definition->getAutowiringTypes() as $type) {
+            $this->definedTypes[$type] = true;
+            $this->types[$type] = $id;
+            unset($this->ambiguousServiceTypes[$type]);
+        }
+
+        if (!$reflectionClass = $this->getReflectionClass($id, $definition)) {
+            return;
+        }
+
+        foreach ($reflectionClass->getInterfaces() as $reflectionInterface) {
+            $this->set($reflectionInterface->name, $id);
+        }
+
+        do {
+            $this->set($reflectionClass->name, $id);
+        } while ($reflectionClass = $reflectionClass->getParentClass());
+    }
+
+    /**
+     * Associates a type and a service id if applicable.
+     *
+     * @param string $type
+     * @param string $id
+     */
+    private function set($type, $id)
+    {
+        if (isset($this->definedTypes[$type])) {
+            return;
+        }
+
+        // is this already a type/class that is known to match multiple services?
+        if (isset($this->ambiguousServiceTypes[$type])) {
+            $this->ambiguousServiceTypes[$type][] = $id;
+
+            return;
+        }
+
+        // check to make sure the type doesn't match multiple services
+        if (!isset($this->types[$type]) || $this->types[$type] === $id) {
+            $this->types[$type] = $id;
+
+            return;
+        }
+
+        // keep an array of all services matching this type
+        if (!isset($this->ambiguousServiceTypes[$type])) {
+            $this->ambiguousServiceTypes[$type] = array($this->types[$type]);
+            unset($this->types[$type]);
+        }
+        $this->ambiguousServiceTypes[$type][] = $id;
+    }
+
+    /**
+     * Registers a definition for the type if possible or throws an exception.
+     *
+     * @param \ReflectionClass $typeHint
+     * @param string           $id
+     *
+     * @return Reference A reference to the registered definition
+     *
+     * @throws RuntimeException
+     */
+    private function createAutowiredDefinition(\ReflectionClass $typeHint, $id)
+    {
+        if (isset($this->ambiguousServiceTypes[$typeHint->name])) {
+            $classOrInterface = $typeHint->isInterface() ? 'interface' : 'class';
+            $matchingServices = implode(', ', $this->ambiguousServiceTypes[$typeHint->name]);
+
+            throw new RuntimeException(sprintf('Unable to autowire argument of type "%s" for the service "%s". Multiple services exist for this %s (%s).', $typeHint->name, $id, $classOrInterface, $matchingServices));
+        }
+
+        if (!$typeHint->isInstantiable()) {
+            $classOrInterface = $typeHint->isInterface() ? 'interface' : 'class';
+            throw new RuntimeException(sprintf('Unable to autowire argument of type "%s" for the service "%s". No services were found matching this %s and it cannot be auto-registered.', $typeHint->name, $id, $classOrInterface));
+        }
+
+        $this->autowired[$typeHint->name] = $argumentId = sprintf('autowired.%s', $typeHint->name);
+
+        $argumentDefinition = $this->container->register($argumentId, $typeHint->name);
+        $argumentDefinition->setPublic(false);
+
+        try {
+            $this->completeDefinition($argumentId, $argumentDefinition);
+        } catch (RuntimeException $e) {
+            $classOrInterface = $typeHint->isInterface() ? 'interface' : 'class';
+            $message = sprintf('Unable to autowire argument of type "%s" for the service "%s". No services were found matching this %s and it cannot be auto-registered.', $typeHint->name, $id, $classOrInterface);
+            throw new RuntimeException($message, 0, $e);
+        }
+
+        return new Reference($argumentId);
+    }
+
+    /**
+     * Retrieves the reflection class associated with the given service.
+     *
+     * @param string     $id
+     * @param Definition $definition
+     *
+     * @return \ReflectionClass|false
+     */
+    private function getReflectionClass($id, Definition $definition)
+    {
+        if (isset($this->reflectionClasses[$id])) {
+            return $this->reflectionClasses[$id];
+        }
+
+        // Cannot use reflection if the class isn't set
+        if (!$class = $definition->getClass()) {
+            return false;
+        }
+
+        $class = $this->container->getParameterBag()->resolveValue($class);
+
+        if ($deprecated = $definition->isDeprecated()) {
+            $prevErrorHandler = set_error_handler(function ($level, $message, $file, $line) use (&$prevErrorHandler) {
+                return (E_USER_DEPRECATED === $level || !$prevErrorHandler) ? false : $prevErrorHandler($level, $message, $file, $line);
+            });
+        }
+
+        $e = null;
+
+        try {
+            $reflector = new \ReflectionClass($class);
+        } catch (\Exception $e) {
+        } catch (\Throwable $e) {
+        }
+
+        if ($deprecated) {
+            restore_error_handler();
+        }
+
+        if (null !== $e) {
+            if (!$e instanceof \ReflectionException) {
+                throw $e;
+            }
+            $reflector = false;
+        }
+
+        return $this->reflectionClasses[$id] = $reflector;
+    }
+
+    /**
+     * @param \ReflectionClass $reflectionClass
+     *
+     * @return \ReflectionMethod[]
+     */
+    private static function getSetters(\ReflectionClass $reflectionClass)
+    {
+        foreach ($reflectionClass->getMethods(\ReflectionMethod::IS_PUBLIC) as $reflectionMethod) {
+            if (!$reflectionMethod->isStatic() && 1 === $reflectionMethod->getNumberOfParameters() && 0 === strpos($reflectionMethod->name, 'set')) {
+                yield $reflectionMethod;
+            }
+        }
+    }
+
+    private static function getResourceMetadataForMethod(\ReflectionMethod $method)
+    {
+        $methodArgumentsMetadata = array();
+        foreach ($method->getParameters() as $parameter) {
+            try {
+                $class = $parameter->getClass();
+            } catch (\ReflectionException $e) {
+                // type-hint is against a non-existent class
+                $class = false;
+            }
+
+            $isVariadic = method_exists($parameter, 'isVariadic') && $parameter->isVariadic();
+            $methodArgumentsMetadata[] = array(
+                'class' => $class,
+                'isOptional' => $parameter->isOptional(),
+                'defaultValue' => ($parameter->isOptional() && !$isVariadic) ? $parameter->getDefaultValue() : null,
+            );
+        }
+
+        return $methodArgumentsMetadata;
+    }
+}