Container::checkInjector() - Code Metrics - Inspection of "Monrepo initialization" - spiral/framework - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Pull Request — master (#277)

by Kirill

created 2020-08-14 14:25 UTC

Container::checkInjector() B

↳ Parent: Container

Complexity

Conditions	10
Paths	6

Size

Total Lines	39
Code Lines	22

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	10
eloc	22
nc	6
nop	1
dl	0
loc	39
rs	7.6666
c	0
b	0
f	0

How to fix Complexity

<?php

/**
 * Spiral Framework.
 *
 * @license   MIT
 * @author    Anton Titov (Wolfy-J)
 */

declare(strict_types=1);

namespace Spiral\Core;

use Closure;
use Psr\Container\ContainerExceptionInterface;
use Psr\Container\ContainerInterface;
use ReflectionClass;
use ReflectionException;
use ReflectionFunction;
use ReflectionFunctionAbstract as ContextFunction;
use ReflectionMethod;
use ReflectionParameter;
use Spiral\Core\Container\Autowire;
use Spiral\Core\Container\InjectableInterface;
use Spiral\Core\Container\InjectorInterface;
use Spiral\Core\Container\SingletonInterface;
use Spiral\Core\Exception\Container\ArgumentException;
use Spiral\Core\Exception\Container\AutowireException;
use Spiral\Core\Exception\Container\ContainerException;
use Spiral\Core\Exception\Container\InjectionException;
use Spiral\Core\Exception\Container\NotFoundException;
use Spiral\Core\Exception\LogicException;
use Throwable;

/**
 * Auto-wiring container: declarative singletons, contextual injections, parent container
 * delegation and ability to lazy wire.
 *
 * Container does not support setter injections, private properties and etc. Normally it will work
 * with classes only to be as much invisible as possible. Attention, this is hungry implementation
 * of container, meaning it WILL try to resolve dependency unless you specified custom lazy
 * factory.
 *
 * You can use injectors to delegate class resolution to external container.
 *
 * @see \Spiral\Core\Container::registerInstance() to add your own behaviours.
 *
 * @see InjectableInterface
 * @see SingletonInterface
 */
final class Container implements
    ContainerInterface,
    BinderInterface,
    FactoryInterface,
    ResolverInterface,
    ScopeInterface
{
    /**
     * @internal
     * @var array
     */
    private $bindings = [
        ContainerInterface::class => self::class,
        BinderInterface::class    => self::class,
        FactoryInterface::class   => self::class,
        ScopeInterface::class     => self::class,
        ResolverInterface::class  => self::class
    ];

    /**
     * List of classes responsible for handling specific instance or interface. Provides ability to
     * delegate container functionality.
     *
     * @internal
     * @var array
     */
    private $injectors = [];

    /**
     * Contains names of all classes which were checked for the available injectors.
     *
     * @internal
     * @var array
     */
    private $injectorsCache = [];

    /**
     * Container constructor.
     */
    public function __construct()
    {
        $this->bindings[static::class] = self::class;
        $this->bindings[self::class] = $this;
    }

    /**
     * Container can not be cloned.
     */
    public function __clone()
    {
        throw new LogicException('Container is not clonable');
    }

    /**
     * {@inheritdoc}
     */
    public function has($alias)
    {
        return array_key_exists($alias, $this->bindings);
    }

    /**
     * {@inheritdoc}
     *
     * Context parameter will be passed to class injectors, which makes possible to use this method
     * as:
     *
     * $this->container->get(DatabaseInterface::class, 'default');
     *
     * Attention, context ignored when outer container has instance by alias.
     *
     * @param string|null $context Call context.
     *
     * @throws ContainerException
     * @throws Throwable
     */
    public function get($alias, string $context = null)
    {
        if ($alias instanceof Autowire) {
            return $alias->resolve($this);
        }

        return $this->make($alias, [], $context);
    }

    /**
     * {@inheritdoc}
     *
     * @param string|null $context Related to parameter caused injection if any.
     *
     * @throws Throwable
     */
    public function make(string $alias, array $parameters = [], string $context = null)
    {
        if (!isset($this->bindings[$alias])) {
            //No direct instructions how to construct class, make is automatically
            return $this->autowire($alias, $parameters, $context);
        }

        $binding = $this->bindings[$alias];
        if (is_object($binding)) {
            //When binding is instance, assuming singleton
            return $binding;
        }

        if (is_string($binding)) {
            //Binding is pointing to something else
            return $this->make($binding, $parameters, $context);
        }

        unset($this->bindings[$alias]);
        try {
            if ($binding[0] === $alias) {
                $instance = $this->autowire($alias, $parameters, $context);
            } else {
                $instance = $this->evaluateBinding($alias, $binding[0], $parameters, $context);
            }
        } finally {
            $this->bindings[$alias] = $binding;
        }

        if ($binding[1]) {
            //Indicates singleton
            $this->bindings[$alias] = $instance;

        }

        return $instance;
    }

    /**
     * {@inheritdoc}
     *
     * @param string $context
     *
     * @throws Throwable
     */
    public function resolveArguments(
        ContextFunction $reflection,
        array $parameters = [],
        string $context = null
    ): array {
        $arguments = [];
        foreach ($reflection->getParameters() as $parameter) {
            try {
                //Information we need to know about argument in order to resolve it's value
                $name = $parameter->getName();
                $class = $parameter->getClass();
            } catch (Throwable $e) {
                //Possibly invalid class definition or syntax error
                $location = $reflection->getName();
                if ($reflection instanceof ReflectionMethod) {
                    $location = "{$reflection->getDeclaringClass()->getName()}->{$location}";
                }
                //Possibly invalid class definition or syntax error
                throw new ContainerException(
                    "Unable to resolve `{$parameter->getName()}` in {$location}: " . $e->getMessage(),
                    $e->getCode(),
                    $e
                );
            }

            if (isset($parameters[$name]) && is_object($parameters[$name])) {
                if ($parameters[$name] instanceof Autowire) {
                    //Supplied by user as late dependency
                    $arguments[] = $parameters[$name]->resolve($this);
                } else {
                    //Supplied by user as object
                    $arguments[] = $parameters[$name];
                }
                continue;
            }

            // no declared type or scalar type or array
            if (!isset($class)) {
                //Provided from outside
                if (array_key_exists($name, $parameters)) {
                    //Make sure it's properly typed
                    $this->assertType($parameter, $reflection, $parameters[$name]);
                    $arguments[] = $parameters[$name];
                    continue;
                }

                if ($parameter->isDefaultValueAvailable()) {
                    //Default value
                    $arguments[] = $parameter->getDefaultValue();
                    continue;
                }

                //Unable to resolve scalar argument value
                throw new ArgumentException($parameter, $reflection);
            }

            try {
                //Requesting for contextual dependency
                $arguments[] = $this->get($class->getName(), $name);
                continue;
            } catch (AutowireException $e) {
                if ($parameter->isOptional()) {
                    //This is optional dependency, skip
                    $arguments[] = null;
                    continue;
                }

                throw $e;
            }
        }

        return $arguments;
    }

    /**
     * @inheritdoc
     */
    public function runScope(array $bindings, callable $scope)
    {
        $cleanup = $previous = [];
        foreach ($bindings as $alias => $resolver) {
            if (isset($this->bindings[$alias])) {
                $previous[$alias] = $this->bindings[$alias];
            } else {
                $cleanup[] = $alias;
            }

            $this->bind($alias, $resolver);
        }

        try {
            if (ContainerScope::getContainer() !== $this) {

                return ContainerScope::runScope($this, $scope);
            }

            return $scope();
        } finally {
            foreach (array_reverse($previous) as $alias => $resolver) {
                $this->bindings[$alias] = $resolver;
            }

            foreach ($cleanup as $alias) {
                unset($this->bindings[$alias]);
            }
        }
    }

    /**
     * Bind value resolver to container alias. Resolver can be class name (will be constructed
     * for each method call), function array or Closure (executed every call). Only object resolvers
     * supported by this method.
     *
     * @param string                $alias
     * @param string|array|callable $resolver
     */
    public function bind(string $alias, $resolver): void
    {
        if (is_array($resolver) || $resolver instanceof Closure || $resolver instanceof Autowire) {
            // array means = execute me, false = not singleton
            $this->bindings[$alias] = [$resolver, false];
            return;
        }

        $this->bindings[$alias] = $resolver;
    }

    /**
     * Bind value resolver to container alias to be executed as cached. Resolver can be class name
     * (will be constructed only once), function array or Closure (executed only once call).
     *
     * @param string                $alias
     * @param string|array|callable $resolver
     */
    public function bindSingleton(string $alias, $resolver): void
    {
        if (is_object($resolver) && !$resolver instanceof Closure && !$resolver instanceof Autowire) {
            // direct binding to an instance
            $this->bindings[$alias] = $resolver;
            return;
        }

        $this->bindings[$alias] = [$resolver, true];
    }

    /**
     * Check if alias points to constructed instance (singleton).
     *
     * @param string $alias
     * @return bool
     */
    public function hasInstance(string $alias): bool
    {
        if (!$this->has($alias)) {
            return false;
        }

        while (isset($this->bindings[$alias]) && is_string($this->bindings[$alias])) {
            //Checking alias tree
            $alias = $this->bindings[$alias];
        }

        return isset($this->bindings[$alias]) && is_object($this->bindings[$alias]);
    }

    /**
     * @param string $alias
     */
    public function removeBinding(string $alias): void
    {
        unset($this->bindings[$alias]);
    }

    /**
     * Bind class or class interface to the injector source (InjectorInterface).
     *
     * @param string $class
     * @param string $injector
     * @return self
     */
    public function bindInjector(string $class, string $injector): Container
    {
        $this->injectors[$class] = $injector;
        $this->injectorsCache = [];

        return $this;
    }

    /**
     * @param string $class
     */
    public function removeInjector(string $class): void
    {
        unset($this->injectors[$class]);
        $this->injectorsCache = [];
    }

    /**
     * Every declared Container binding. Must not be used in production code due container format is
     * vary.
     *
     * @return array
     */
    public function getBindings(): array
    {
        return $this->bindings;
    }

    /**
     * Every binded injector.
     *
     * @return array
     */
    public function getInjectors(): array
    {
        return $this->injectors;
    }

    /**
     * Automatically create class.
     *
     * @param string $class
     * @param array  $parameters
     * @param string $context
     * @return object
     *
     * @throws AutowireException
     * @throws Throwable
     */
    protected function autowire(string $class, array $parameters, string $context = null)
    {
        if (!class_exists($class)) {
            throw new NotFoundException(sprintf("Undefined class or binding '%s'", $class));
        }

        // automatically create instance
        $instance = $this->createInstance($class, $parameters, $context);

        // apply registration functions to created instance
        return $this->registerInstance($instance, $parameters);
    }

    /**
     * Register instance in container, might perform methods like auto-singletons, log populations
     * and etc. Can be extended.
     *
     * @param object $instance   Created object.
     * @param array  $parameters Parameters which been passed with created instance.
     * @return object
     */
    private function registerInstance($instance, array $parameters)
    {
        //Declarative singletons (only when class received via direct get)
        if ($parameters === [] && $instance instanceof SingletonInterface) {
            $alias = get_class($instance);
            if (!isset($this->bindings[$alias])) {
                $this->bindings[$alias] = $instance;
            }
        }

        //Your code can go here (for example LoggerAwareInterface, custom hydration and etc)
        return $instance;
    }

    /**
     * @param string      $alias
     * @param mixed       $target Value binded by user.
     * @param array       $parameters
     * @param string|null $context
     * @return mixed|null|object
     *
     * @throws ContainerExceptionInterface
     * @throws Throwable
     */
    private function evaluateBinding(
        string $alias,
        $target,
        array $parameters,
        string $context = null
    ) {
        if (is_string($target)) {
            //Reference
            return $this->make($target, $parameters, $context);
        }

        if ($target instanceof Autowire) {
            return $target->resolve($this, $parameters);
        }

        if ($target instanceof Closure) {
            try {
                $reflection = new ReflectionFunction($target);
            } catch (ReflectionException $e) {
                throw new ContainerException($e->getMessage(), $e->getCode(), $e);
            }

            //Invoking Closure with resolved arguments
            return $reflection->invokeArgs(
                $this->resolveArguments($reflection, $parameters, $context)
            );
        }

        if (is_array($target) && isset($target[1])) {
            //In a form of resolver and method
            [$resolver, $method] = $target;

            //Resolver instance (i.e. [ClassName::class, 'method'])
            $resolver = $this->get($resolver);

            try {
                $method = new ReflectionMethod($resolver, $method);
            } catch (ReflectionException $e) {
                throw new ContainerException($e->getMessage(), $e->getCode(), $e);
            }

            $method->setAccessible(true);

            //Invoking factory method with resolved arguments
            return $method->invokeArgs(
                $resolver,
                $this->resolveArguments($method, $parameters, $context)
            );
        }

        throw new ContainerException(sprintf("Invalid binding for '%s'", $alias));
    }

    /**
     * Create instance of desired class.
     *
     * @param string      $class
     * @param array       $parameters Constructor parameters.
     * @param string|null $context
     * @return object
     *
     * @throws ContainerException
     * @throws Throwable
     */
    private function createInstance(string $class, array $parameters, string $context = null)
    {
        try {
            $reflection = new ReflectionClass($class);
        } catch (ReflectionException $e) {
            throw new ContainerException($e->getMessage(), $e->getCode(), $e);
        }

        //We have to construct class using external injector when we know exact context
        if ($parameters === [] && $this->checkInjector($reflection)) {
            $injector = $this->injectors[$reflection->getName()];

            $instance = null;
            try {
                /** @var InjectorInterface $injectorInstance */
                $injectorInstance = $this->get($injector);

                if (!$injectorInstance instanceof InjectorInterface) {

                    throw new InjectionException(
                        sprintf(
                            "Class '%s' must be an instance of InjectorInterface for '%s'",
                            get_class($injectorInstance),
                            $reflection->getName()
                        )
                    );
                }

                $instance = $injectorInstance->createInjection($reflection, $context);
                if (!$reflection->isInstance($instance)) {
                    throw new InjectionException(
                        sprintf(
                            "Invalid injection response for '%s'",
                            $reflection->getName()
                        )
                    );
                }
            } finally {
                $this->injectors[$reflection->getName()] = $injector;
            }

            return $instance;
        }

        if (!$reflection->isInstantiable()) {
            throw new ContainerException(sprintf("Class '%s' can not be constructed", $class));
        }

        $constructor = $reflection->getConstructor();

        if ($constructor !== null) {
            // Using constructor with resolved arguments
            $instance = $reflection->newInstanceArgs($this->resolveArguments($constructor, $parameters));
        } else {
            // No constructor specified
            $instance = $reflection->newInstance();
        }

        return $instance;
    }

    /**
     * Checks if given class has associated injector.
     *
     * @param ReflectionClass $reflection
     * @return bool
     */
    private function checkInjector(ReflectionClass $reflection): bool
    {
        $class = $reflection->getName();
        if (array_key_exists($class, $this->injectors)) {
            return $this->injectors[$class] !== null;
        }

        if (
            $reflection->implementsInterface(InjectableInterface::class)
            && $reflection->hasConstant('INJECTOR')
        ) {
            $this->injectors[$class] = $reflection->getConstant('INJECTOR');
            return true;
        }

        if (!isset($this->injectorsCache[$class])) {
            $this->injectorsCache[$class] = null;

            // check interfaces
            foreach ($this->injectors as $target => $injector) {
                if (
                    class_exists($target, true)
                    && $reflection->isSubclassOf($target)
                ) {
                    $this->injectors[$class] = $injector;
                    return true;
                }

                if (
                    interface_exists($target, true)
                    && $reflection->implementsInterface($target)
                ) {
                    $this->injectors[$class] = $injector;
                    return true;
                }
            }
        }

        return false;
    }

    /**
     * Assert that given value are matched parameter type.
     *
     * @param ReflectionParameter $parameter
     * @param ContextFunction     $context
     * @param mixed               $value
     *
     * @throws ArgumentException
     * @throws ReflectionException
     */
    private function assertType(ReflectionParameter $parameter, ContextFunction $context, $value): void
    {
        if ($value === null) {
            if (
                !$parameter->isOptional() &&
                !($parameter->isDefaultValueAvailable() && $parameter->getDefaultValue() === null)
            ) {
                throw new ArgumentException($parameter, $context);
            }

            return;
        }

        $type = $parameter->getType();
        if ($type === null) {
            return;
        }

        $typeName = $type->getName();
        if ($typeName === 'array' && !is_array($value)) {
            throw new ArgumentException($parameter, $context);
        }

        if (($typeName === 'int' || $typeName === 'float') && !is_numeric($value)) {
            throw new ArgumentException($parameter, $context);
        }

        if ($typeName === 'bool' && !is_bool($value) && !is_numeric($value)) {
            throw new ArgumentException($parameter, $context);
        }
    }
}


1			<?php
2
3			/**
4			* Spiral Framework.
5			*
6			* @license MIT
7			* @author Anton Titov (Wolfy-J)
8			*/
9
10			declare(strict_types=1);
11
12			namespace Spiral\Core;
13
14			use Closure;
15			use Psr\Container\ContainerExceptionInterface;
16			use Psr\Container\ContainerInterface;
17			use ReflectionClass;
18			use ReflectionException;
19			use ReflectionFunction;
20			use ReflectionFunctionAbstract as ContextFunction;
21			use ReflectionMethod;
22			use ReflectionParameter;
23			use Spiral\Core\Container\Autowire;
24			use Spiral\Core\Container\InjectableInterface;
25			use Spiral\Core\Container\InjectorInterface;
26			use Spiral\Core\Container\SingletonInterface;
27			use Spiral\Core\Exception\Container\ArgumentException;
28			use Spiral\Core\Exception\Container\AutowireException;
29			use Spiral\Core\Exception\Container\ContainerException;
30			use Spiral\Core\Exception\Container\InjectionException;
31			use Spiral\Core\Exception\Container\NotFoundException;
32			use Spiral\Core\Exception\LogicException;
33			use Throwable;
34
35			/**
36			* Auto-wiring container: declarative singletons, contextual injections, parent container
37			* delegation and ability to lazy wire.
38			*
39			* Container does not support setter injections, private properties and etc. Normally it will work
40			* with classes only to be as much invisible as possible. Attention, this is hungry implementation
41			* of container, meaning it WILL try to resolve dependency unless you specified custom lazy
42			* factory.
43			*
44			* You can use injectors to delegate class resolution to external container.
45			*
46			* @see \Spiral\Core\Container::registerInstance() to add your own behaviours.
47			*
48			* @see InjectableInterface
49			* @see SingletonInterface
50			*/
51			final class Container implements
52			ContainerInterface,
53			BinderInterface,
54			FactoryInterface,
55			ResolverInterface,
56			ScopeInterface
57			{
58			/**
59			* @internal
60			* @var array
61			*/
62			private $bindings = [
63			ContainerInterface::class => self::class,
64			BinderInterface::class => self::class,
65			FactoryInterface::class => self::class,
66			ScopeInterface::class => self::class,
67			ResolverInterface::class => self::class
68			];
69
70			/**
71			* List of classes responsible for handling specific instance or interface. Provides ability to
72			* delegate container functionality.
73			*
74			* @internal
75			* @var array
76			*/
77			private $injectors = [];
78
79			/**
80			* Contains names of all classes which were checked for the available injectors.
81			*
82			* @internal
83			* @var array
84			*/
85			private $injectorsCache = [];
86
87			/**
88			* Container constructor.
89			*/
90			public function __construct()
91			{
92			$this->bindings[static::class] = self::class;
93			$this->bindings[self::class] = $this;
94			}
95
96			/**
97			* Container can not be cloned.
98			*/
99			public function __clone()
100			{
101			throw new LogicException('Container is not clonable');
102			}
103
104			/**
105			* {@inheritdoc}
106			*/
107			public function has($alias)
108			{
109			return array_key_exists($alias, $this->bindings);
110			}
111
112			/**
113			* {@inheritdoc}
114			*
115			* Context parameter will be passed to class injectors, which makes possible to use this method
116			* as:
117			*
118			* $this->container->get(DatabaseInterface::class, 'default');
119			*
120			* Attention, context ignored when outer container has instance by alias.
121			*
122			* @param string\|null $context Call context.
123			*
124			* @throws ContainerException
125			* @throws Throwable
126			*/
127			public function get($alias, string $context = null)
128			{
129			if ($alias instanceof Autowire) {
130			return $alias->resolve($this);
131			}
132
133			return $this->make($alias, [], $context);
134			}
135
136			/**
137			* {@inheritdoc}
138			*
139			* @param string\|null $context Related to parameter caused injection if any.
140			*
141			* @throws Throwable
142			*/
143			public function make(string $alias, array $parameters = [], string $context = null)
144			{
145			if (!isset($this->bindings[$alias])) {
146			//No direct instructions how to construct class, make is automatically
147			return $this->autowire($alias, $parameters, $context);
148			}
149
150			$binding = $this->bindings[$alias];
151			if (is_object($binding)) {
152			//When binding is instance, assuming singleton
153			return $binding;
154			}
155
156			if (is_string($binding)) {
157			//Binding is pointing to something else
158			return $this->make($binding, $parameters, $context);
159			}
160
161			unset($this->bindings[$alias]);
162			try {
163			if ($binding[0] === $alias) {
164			$instance = $this->autowire($alias, $parameters, $context);
165			} else {
166			$instance = $this->evaluateBinding($alias, $binding[0], $parameters, $context);
167			}
168			} finally {
169			$this->bindings[$alias] = $binding;
170			}
171
172			if ($binding[1]) {
173			//Indicates singleton
174			$this->bindings[$alias] = $instance;
			0 ignored issues – show Comprehensibility Best Practice introduced 2020-08-14 00:55 UTC by Report Bug Copy Issue Report The variable `$instance` does not seem to be defined for all execution paths leading up to this point. Loading history...
175			}
176
177			return $instance;
178			}
179
180			/**
181			* {@inheritdoc}
182			*
183			* @param string $context
184			*
185			* @throws Throwable
186			*/
187			public function resolveArguments(
188			ContextFunction $reflection,
189			array $parameters = [],
190			string $context = null
191			): array {
192			$arguments = [];
193			foreach ($reflection->getParameters() as $parameter) {
194			try {
195			//Information we need to know about argument in order to resolve it's value
196			$name = $parameter->getName();
197			$class = $parameter->getClass();
198			} catch (Throwable $e) {
199			//Possibly invalid class definition or syntax error
200			$location = $reflection->getName();
201			if ($reflection instanceof ReflectionMethod) {
202			$location = "{$reflection->getDeclaringClass()->getName()}->{$location}";
203			}
204			//Possibly invalid class definition or syntax error
205			throw new ContainerException(
206			"Unable to resolve `{$parameter->getName()}` in {$location}: " . $e->getMessage(),
207			$e->getCode(),
208			$e
209			);
210			}
211
212			if (isset($parameters[$name]) && is_object($parameters[$name])) {
213			if ($parameters[$name] instanceof Autowire) {
214			//Supplied by user as late dependency
215			$arguments[] = $parameters[$name]->resolve($this);
216			} else {
217			//Supplied by user as object
218			$arguments[] = $parameters[$name];
219			}
220			continue;
221			}
222
223			// no declared type or scalar type or array
224			if (!isset($class)) {
225			//Provided from outside
226			if (array_key_exists($name, $parameters)) {
227			//Make sure it's properly typed
228			$this->assertType($parameter, $reflection, $parameters[$name]);
229			$arguments[] = $parameters[$name];
230			continue;
231			}
232
233			if ($parameter->isDefaultValueAvailable()) {
234			//Default value
235			$arguments[] = $parameter->getDefaultValue();
236			continue;
237			}
238
239			//Unable to resolve scalar argument value
240			throw new ArgumentException($parameter, $reflection);
241			}
242
243			try {
244			//Requesting for contextual dependency
245			$arguments[] = $this->get($class->getName(), $name);
246			continue;
247			} catch (AutowireException $e) {
248			if ($parameter->isOptional()) {
249			//This is optional dependency, skip
250			$arguments[] = null;
251			continue;
252			}
253
254			throw $e;
255			}
256			}
257
258			return $arguments;
259			}
260
261			/**
262			* @inheritdoc
263			*/
264			public function runScope(array $bindings, callable $scope)
265			{
266			$cleanup = $previous = [];
267			foreach ($bindings as $alias => $resolver) {
268			if (isset($this->bindings[$alias])) {
269			$previous[$alias] = $this->bindings[$alias];
270			} else {
271			$cleanup[] = $alias;
272			}
273
274			$this->bind($alias, $resolver);
275			}
276
277			try {
278			if (ContainerScope::getContainer() !== $this) {
			0 ignored issues – show introduced 2020-08-14 00:55 UTC by Report Bug Copy Issue Report The condition `Spiral\Core\ContainerSco...etContainer() !== $this` is always `true`. Loading history...
279			return ContainerScope::runScope($this, $scope);
280			}
281
282			return $scope();
283			} finally {
284			foreach (array_reverse($previous) as $alias => $resolver) {
285			$this->bindings[$alias] = $resolver;
286			}
287
288			foreach ($cleanup as $alias) {
289			unset($this->bindings[$alias]);
290			}
291			}
292			}
293
294			/**
295			* Bind value resolver to container alias. Resolver can be class name (will be constructed
296			* for each method call), function array or Closure (executed every call). Only object resolvers
297			* supported by this method.
298			*
299			* @param string $alias
300			* @param string\|array\|callable $resolver
301			*/
302			public function bind(string $alias, $resolver): void
303			{
304			if (is_array($resolver) \|\| $resolver instanceof Closure \|\| $resolver instanceof Autowire) {
305			// array means = execute me, false = not singleton
306			$this->bindings[$alias] = [$resolver, false];
307			return;
308			}
309
310			$this->bindings[$alias] = $resolver;
311			}
312
313			/**
314			* Bind value resolver to container alias to be executed as cached. Resolver can be class name
315			* (will be constructed only once), function array or Closure (executed only once call).
316			*
317			* @param string $alias
318			* @param string\|array\|callable $resolver
319			*/
320			public function bindSingleton(string $alias, $resolver): void
321			{
322			if (is_object($resolver) && !$resolver instanceof Closure && !$resolver instanceof Autowire) {
323			// direct binding to an instance
324			$this->bindings[$alias] = $resolver;
325			return;
326			}
327
328			$this->bindings[$alias] = [$resolver, true];
329			}
330
331			/**
332			* Check if alias points to constructed instance (singleton).
333			*
334			* @param string $alias
335			* @return bool
336			*/
337			public function hasInstance(string $alias): bool
338			{
339			if (!$this->has($alias)) {
340			return false;
341			}
342
343			while (isset($this->bindings[$alias]) && is_string($this->bindings[$alias])) {
344			//Checking alias tree
345			$alias = $this->bindings[$alias];
346			}
347
348			return isset($this->bindings[$alias]) && is_object($this->bindings[$alias]);
349			}
350
351			/**
352			* @param string $alias
353			*/
354			public function removeBinding(string $alias): void
355			{
356			unset($this->bindings[$alias]);
357			}
358
359			/**
360			* Bind class or class interface to the injector source (InjectorInterface).
361			*
362			* @param string $class
363			* @param string $injector
364			* @return self
365			*/
366			public function bindInjector(string $class, string $injector): Container
367			{
368			$this->injectors[$class] = $injector;
369			$this->injectorsCache = [];
370
371			return $this;
372			}
373
374			/**
375			* @param string $class
376			*/
377			public function removeInjector(string $class): void
378			{
379			unset($this->injectors[$class]);
380			$this->injectorsCache = [];
381			}
382
383			/**
384			* Every declared Container binding. Must not be used in production code due container format is
385			* vary.
386			*
387			* @return array
388			*/
389			public function getBindings(): array
390			{
391			return $this->bindings;
392			}
393
394			/**
395			* Every binded injector.
396			*
397			* @return array
398			*/
399			public function getInjectors(): array
400			{
401			return $this->injectors;
402			}
403
404			/**
405			* Automatically create class.
406			*
407			* @param string $class
408			* @param array $parameters
409			* @param string $context
410			* @return object
411			*
412			* @throws AutowireException
413			* @throws Throwable
414			*/
415			protected function autowire(string $class, array $parameters, string $context = null)
416			{
417			if (!class_exists($class)) {
418			throw new NotFoundException(sprintf("Undefined class or binding '%s'", $class));
419			}
420
421			// automatically create instance
422			$instance = $this->createInstance($class, $parameters, $context);
423
424			// apply registration functions to created instance
425			return $this->registerInstance($instance, $parameters);
426			}
427
428			/**
429			* Register instance in container, might perform methods like auto-singletons, log populations
430			* and etc. Can be extended.
431			*
432			* @param object $instance Created object.
433			* @param array $parameters Parameters which been passed with created instance.
434			* @return object
435			*/
436			private function registerInstance($instance, array $parameters)
437			{
438			//Declarative singletons (only when class received via direct get)
439			if ($parameters === [] && $instance instanceof SingletonInterface) {
440			$alias = get_class($instance);
441			if (!isset($this->bindings[$alias])) {
442			$this->bindings[$alias] = $instance;
443			}
444			}
445
446			//Your code can go here (for example LoggerAwareInterface, custom hydration and etc)
447			return $instance;
448			}
449
450			/**
451			* @param string $alias
452			* @param mixed $target Value binded by user.
453			* @param array $parameters
454			* @param string\|null $context
455			* @return mixed\|null\|object
456			*
457			* @throws ContainerExceptionInterface
458			* @throws Throwable
459			*/
460			private function evaluateBinding(
461			string $alias,
462			$target,
463			array $parameters,
464			string $context = null
465			) {
466			if (is_string($target)) {
467			//Reference
468			return $this->make($target, $parameters, $context);
469			}
470
471			if ($target instanceof Autowire) {
472			return $target->resolve($this, $parameters);
473			}
474
475			if ($target instanceof Closure) {
476			try {
477			$reflection = new ReflectionFunction($target);
478			} catch (ReflectionException $e) {
479			throw new ContainerException($e->getMessage(), $e->getCode(), $e);
480			}
481
482			//Invoking Closure with resolved arguments
483			return $reflection->invokeArgs(
484			$this->resolveArguments($reflection, $parameters, $context)
485			);
486			}
487
488			if (is_array($target) && isset($target[1])) {
489			//In a form of resolver and method
490			[$resolver, $method] = $target;
491
492			//Resolver instance (i.e. [ClassName::class, 'method'])
493			$resolver = $this->get($resolver);
494
495			try {
496			$method = new ReflectionMethod($resolver, $method);
497			} catch (ReflectionException $e) {
498			throw new ContainerException($e->getMessage(), $e->getCode(), $e);
499			}
500
501			$method->setAccessible(true);
502
503			//Invoking factory method with resolved arguments
504			return $method->invokeArgs(
505			$resolver,
506			$this->resolveArguments($method, $parameters, $context)
507			);
508			}
509
510			throw new ContainerException(sprintf("Invalid binding for '%s'", $alias));
511			}
512
513			/**
514			* Create instance of desired class.
515			*
516			* @param string $class
517			* @param array $parameters Constructor parameters.
518			* @param string\|null $context
519			* @return object
520			*
521			* @throws ContainerException
522			* @throws Throwable
523			*/
524			private function createInstance(string $class, array $parameters, string $context = null)
525			{
526			try {
527			$reflection = new ReflectionClass($class);
528			} catch (ReflectionException $e) {
529			throw new ContainerException($e->getMessage(), $e->getCode(), $e);
530			}
531
532			//We have to construct class using external injector when we know exact context
533			if ($parameters === [] && $this->checkInjector($reflection)) {
534			$injector = $this->injectors[$reflection->getName()];
535
536			$instance = null;
537			try {
538			/** @var InjectorInterface $injectorInstance */
539			$injectorInstance = $this->get($injector);
540
541			if (!$injectorInstance instanceof InjectorInterface) {
			0 ignored issues – show introduced 2020-08-14 00:55 UTC by Report Bug Copy Issue Report `$injectorInstance` is always a sub-type of `Spiral\Core\Container\InjectorInterface`. Loading history...
542			throw new InjectionException(
543			sprintf(
544			"Class '%s' must be an instance of InjectorInterface for '%s'",
545			get_class($injectorInstance),
546			$reflection->getName()
547			)
548			);
549			}
550
551			$instance = $injectorInstance->createInjection($reflection, $context);
552			if (!$reflection->isInstance($instance)) {
553			throw new InjectionException(
554			sprintf(
555			"Invalid injection response for '%s'",
556			$reflection->getName()
557			)
558			);
559			}
560			} finally {
561			$this->injectors[$reflection->getName()] = $injector;
562			}
563
564			return $instance;
565			}
566
567			if (!$reflection->isInstantiable()) {
568			throw new ContainerException(sprintf("Class '%s' can not be constructed", $class));
569			}
570
571			$constructor = $reflection->getConstructor();
572
573			if ($constructor !== null) {
574			// Using constructor with resolved arguments
575			$instance = $reflection->newInstanceArgs($this->resolveArguments($constructor, $parameters));
576			} else {
577			// No constructor specified
578			$instance = $reflection->newInstance();
579			}
580
581			return $instance;
582			}
583
584			/**
585			* Checks if given class has associated injector.
586			*
587			* @param ReflectionClass $reflection
588			* @return bool
589			*/
590			private function checkInjector(ReflectionClass $reflection): bool
591			{
592			$class = $reflection->getName();
593			if (array_key_exists($class, $this->injectors)) {
594			return $this->injectors[$class] !== null;
595			}
596
597			if (
598			$reflection->implementsInterface(InjectableInterface::class)
599			&& $reflection->hasConstant('INJECTOR')
600			) {
601			$this->injectors[$class] = $reflection->getConstant('INJECTOR');
602			return true;
603			}
604
605			if (!isset($this->injectorsCache[$class])) {
606			$this->injectorsCache[$class] = null;
607
608			// check interfaces
609			foreach ($this->injectors as $target => $injector) {
610			if (
611			class_exists($target, true)
612			&& $reflection->isSubclassOf($target)
613			) {
614			$this->injectors[$class] = $injector;
615			return true;
616			}
617
618			if (
619			interface_exists($target, true)
620			&& $reflection->implementsInterface($target)
621			) {
622			$this->injectors[$class] = $injector;
623			return true;
624			}
625			}
626			}
627
628			return false;
629			}
630
631			/**
632			* Assert that given value are matched parameter type.
633			*
634			* @param ReflectionParameter $parameter
635			* @param ContextFunction $context
636			* @param mixed $value
637			*
638			* @throws ArgumentException
639			* @throws ReflectionException
640			*/
641			private function assertType(ReflectionParameter $parameter, ContextFunction $context, $value): void
642			{
643			if ($value === null) {
644			if (
645			!$parameter->isOptional() &&
646			!($parameter->isDefaultValueAvailable() && $parameter->getDefaultValue() === null)
647			) {
648			throw new ArgumentException($parameter, $context);
649			}
650
651			return;
652			}
653
654			$type = $parameter->getType();
655			if ($type === null) {
656			return;
657			}
658
659			$typeName = $type->getName();
660			if ($typeName === 'array' && !is_array($value)) {
661			throw new ArgumentException($parameter, $context);
662			}
663
664			if (($typeName === 'int' \|\| $typeName === 'float') && !is_numeric($value)) {
665			throw new ArgumentException($parameter, $context);
666			}
667
668			if ($typeName === 'bool' && !is_bool($value) && !is_numeric($value)) {
669			throw new ArgumentException($parameter, $context);
670			}
671			}
672			}
673

spiral / framework

Pull Request — master (#277)

Container::checkInjector() B

Complexity

Size

Duplication

Importance

How to fix Complexity

Long Method

Duplication Side-by-Side

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