Container::isResolvable() - Code Metrics - Inspection of "Fix has() method" - yiisoft/di - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Pull Request — master (#240)

by Dmitriy

created 2021-08-09 12:19 UTC

Container::isResolvable() D

↳ Parent: Container

Complexity

Conditions	22
Paths	20

Size

Total Lines	87
Code Lines	46

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	33
CRAP Score	31.1815

Importance

Changes	4
Bugs	0	Features	0

Metric	Value
cc	22
eloc	46
c	4
b	0
f	0
nc	20
nop	1
dl	0
loc	87
ccs	33
cts	45
cp	0.7332
crap	31.1815
rs	4.1666

How to fix Long Method Complexity

<?php

declare(strict_types=1);

namespace Yiisoft\Di;

use Closure;
use Psr\Container\ContainerInterface;
use ReflectionClass;
use ReflectionException;
use ReflectionNamedType;
use ReflectionUnionType;
use Yiisoft\Di\Contracts\ServiceProviderInterface;
use Yiisoft\Factory\Definition\ArrayDefinition;
use Yiisoft\Factory\Definition\DefinitionValidator;
use Yiisoft\Factory\Exception\CircularReferenceException;
use Yiisoft\Factory\Exception\InvalidConfigException;
use Yiisoft\Factory\Exception\NotFoundException;
use Yiisoft\Factory\Exception\NotInstantiableException;

use function array_key_exists;
use function array_keys;
use function class_exists;
use function get_class;
use function implode;
use function in_array;
use function is_array;
use function is_object;
use function is_string;

/**
 * Container implements a [dependency injection](http://en.wikipedia.org/wiki/Dependency_injection) container.
 */
final class Container implements ContainerInterface
{
    private const META_TAGS = 'tags';
    private const META_RESET = 'reset';
    private const ALLOWED_META = [self::META_TAGS, self::META_RESET];

    /**
     * @var array object definitions indexed by their types
     */
    private array $definitions = [];
    /**
     * @var array used to collect ids instantiated during build
     * to detect circular references
     */
    private array $building = [];

    /**
     * @var bool $validate Validate definitions when set
     */
    private bool $validate;

    /**
     * @var object[]
     */
    private array $instances = [];

    private array $tags;

    private array $resetters = [];
    /** @psalm-suppress PropertyNotSetInConstructor */
    private DependencyResolver $dependencyResolver;

    /**
     * Container constructor.
     *
     * @param array $definitions Definitions to put into container.
     * @param array $providers Service providers to get definitions from.
     * lookup to when resolving dependencies. If provided the current container
     * is no longer queried for dependencies.
     *
     * @throws InvalidConfigException
     *
     * @psalm-suppress PropertyNotSetInConstructor
     */
    public function __construct(
        array $definitions = [],
        array $providers = [],
        array $tags = [],
        bool $validate = true
    ) {
        $this->tags = $tags;
        $this->validate = $validate;
        $this->setDefaultDefinitions();
        $this->setMultiple($definitions);
        $this->addProviders($providers);
    }

    /**
     * Returns a value indicating whether the container has the definition of the specified name.
     *
     * @param string $id class name, interface name or alias name
     *
     * @return bool whether the container is able to provide instance of class specified.
     *
     * @see set()
     */
    public function has($id): bool
    {
        if ($this->isTagAlias($id)) {
            $tag = substr($id, 4);
            return isset($this->tags[$tag]);
        }

        try {
            return $this->isResolvable($id);
        } catch (CircularReferenceException $e) {
            return false;
        }
    }

    /**
    * @param string $id class name, interface name or alias name
    *
    * @throws CircularReferenceException
    */
    private function isResolvable($id): bool
    {
        if (isset($this->definitions[$id]) || $id === StateResetter::class) {
            return true;
        }

        if (!class_exists($id)) {
            return false;
        }

        if (isset($this->building['class_exists'][$id])) {
            throw new CircularReferenceException(sprintf(
                'Circular reference to "%s" detected while building: %s.',
                $id,
                implode(',', array_keys($this->building['class_exists']))
            ));
        }

        try {
            $reflectionClass = new ReflectionClass($id);
        } catch (ReflectionException $e) {
            return false;
        }

        if (!$reflectionClass->isInstantiable()) {
            return false;
        }

        $constructor = $reflectionClass->getConstructor();

        if ($constructor === null) {
            return true;
        }

        $isResolvable = true;
        $this->building['class_exists'][$id] = 1;

        foreach ($constructor->getParameters() as $parameter) {
            $type = $parameter->getType();

            if ($parameter->isVariadic() || $parameter->isOptional()) {

                break;
            }

            if ($type === null || $type->isBuiltin()) {
                $isResolvable = false;
                break;
            }

            // PHP 8 union type is used as type hint
            /** @psalm-suppress UndefinedClass, TypeDoesNotContainType */
            if ($type instanceof ReflectionUnionType) {
                $isUnionTypeResolvable = false;
                /** @var ReflectionNamedType $unionType */
                foreach ($type->getTypes() as $unionType) {
                    if (!$unionType->isBuiltin()) {
                        $typeName = $unionType->getName();
                        if ($typeName === 'self') {
                            continue;
                        }
                        $isUnionTypeResolvable = $this->isResolvable($typeName);
                    }
                }

                $isResolvable = $isUnionTypeResolvable;
                break;
            }

            /** @var ReflectionNamedType|null $type */
            // Our parameter has a class type hint
            if ($type !== null && !$type->isBuiltin()) {
                $typeName = $type->getName();

                if ($typeName === 'self' || !$this->isResolvable($typeName)) {
                    $isResolvable = false;
                    break;
                }
            }
        }

        if ($isResolvable) {
            $this->definitions[$id] = $id;
        }
        unset($this->building['class_exists'][$id]);

        return $isResolvable;
    }

    /**
     * Returns an instance by either interface name or alias.
     *
     * Same instance of the class will be returned each time this method is called.
     *
     * @param string $id The interface or an alias name that was previously registered.
     *
     * @throws CircularReferenceException
     * @throws InvalidConfigException
     * @throws NotFoundException
     * @throws NotInstantiableException
     *
     * @return mixed|object An instance of the requested interface.
     *
     * @psalm-template T
     * @psalm-param string|class-string<T> $id
     * @psalm-return ($id is class-string ? T : mixed)
     */
    public function get($id)
    {
        if ($id === StateResetter::class && !isset($this->definitions[$id])) {
            $resetters = [];
            foreach ($this->resetters as $serviceId => $callback) {
                if (isset($this->instances[$serviceId])) {
                    $resetters[] = $callback->bindTo($this->instances[$serviceId], get_class($this->instances[$serviceId]));
                }
            }
            return new StateResetter($resetters, $this);
        }

        if (!array_key_exists($id, $this->instances)) {
            $this->instances[$id] = $this->build($id);
        }

        return $this->instances[$id];
    }

    /**
     * Sets a definition to the container. Definition may be defined multiple ways.
     *
     * @param string $id
     * @param mixed $definition
     *
     * @throws InvalidConfigException
     *
     * @see `DefinitionNormalizer::normalize()`
     */
    protected function set(string $id, $definition): void
    {
        [$definition, $meta] = DefinitionParser::parse($definition);
        if ($this->validate) {
            $this->validateDefinition($definition, $id);
            $this->validateMeta($meta);
        }

        if (isset($meta[self::META_TAGS])) {
            if ($this->validate) {
                $this->validateTags($meta[self::META_TAGS]);
            }
            $this->setTags($id, $meta[self::META_TAGS]);
        }
        if (isset($meta[self::META_RESET])) {
            $this->setResetter($id, $meta[self::META_RESET]);
        }

        unset($this->instances[$id]);
        $this->definitions[$id] = $definition;
    }

    /**
     * Sets multiple definitions at once.
     *
     * @param array $config definitions indexed by their ids
     *
     * @throws InvalidConfigException
     */
    protected function setMultiple(array $config): void
    {
        foreach ($config as $id => $definition) {
            if ($this->validate && !is_string($id)) {
                throw new InvalidConfigException(sprintf('Key must be a string. %s given.', $this->getVariableType($id)));
            }
            $this->set($id, $definition);
        }
    }

    private function setDefaultDefinitions(): void
    {
        $this->set(ContainerInterface::class, $this);
    }

    /**
     * @param mixed $definition
     *
     * @throws InvalidConfigException
     */
    private function validateDefinition($definition, ?string $id = null): void
    {
        if (is_array($definition) && isset($definition[DefinitionParser::IS_PREPARED_ARRAY_DEFINITION_DATA])) {
            $class = $definition['class'];
            $constructorArguments = $definition['__construct()'];
            $methodsAndProperties = $definition['methodsAndProperties'];
            $definition = array_merge(
                $class === null ? [] : [ArrayDefinition::CLASS_NAME => $class],
                [ArrayDefinition::CONSTRUCTOR => $constructorArguments],
                $methodsAndProperties,
            );
        }

        if ($definition instanceof ExtensibleService) {
            throw new InvalidConfigException('Invalid definition. ExtensibleService is only allowed in provider extensions.');
        }

        DefinitionValidator::validate($definition, $id);
    }

    /**
     * @throws InvalidConfigException
     */
    private function validateMeta(array $meta): void
    {
        foreach ($meta as $key => $_value) {
            if (!in_array($key, self::ALLOWED_META, true)) {
                throw new InvalidConfigException(
                    sprintf(
                        'Invalid definition: metadata "%s" is not allowed. Did you mean "%s()" or "$%s"?',
                        $key,
                        $key,
                        $key,
                    )
                );
            }
        }
    }

    private function validateTags(array $tags): void
    {
        foreach ($tags as $tag) {
            if (!is_string($tag)) {
                throw new InvalidConfigException('Invalid tag. Expected a string, got ' . var_export($tag, true) . '.');
            }
        }
    }

    private function setTags(string $id, array $tags): void
    {
        foreach ($tags as $tag) {
            if (!isset($this->tags[$tag]) || !in_array($id, $this->tags[$tag], true)) {
                $this->tags[$tag][] = $id;
            }
        }
    }

    private function setResetter(string $id, Closure $resetter): void
    {
        $this->resetters[$id] = $resetter;
    }

    /**
     * Creates new instance by either interface name or alias.
     *
     * @param string $id The interface or an alias name that was previously registered.
     *
     * @throws CircularReferenceException
     * @throws InvalidConfigException
     * @throws NotFoundException
     *
     * @return mixed|object New built instance of the specified class.
     *
     * @internal
     */
    private function build(string $id)
    {
        if ($this->isTagAlias($id)) {
            return $this->getTaggedServices($id);
        }

        if (isset($this->building[$id])) {
            if ($id === ContainerInterface::class) {
                return $this;
            }
            throw new CircularReferenceException(sprintf(
                'Circular reference to "%s" detected while building: %s.',
                $id,
                implode(',', array_keys($this->building))
            ));
        }

        $this->building[$id] = 1;
        try {
            $object = $this->buildInternal($id);
        } finally {
            unset($this->building[$id]);
        }

        return $object;
    }

    private function isTagAlias(string $id): bool
    {
        return strpos($id, 'tag@') === 0;
    }

    private function getTaggedServices(string $tagAlias): array
    {
        $tag = substr($tagAlias, 4);
        $services = [];
        if (isset($this->tags[$tag])) {
            foreach ($this->tags[$tag] as $service) {
                $services[] = $this->get($service);
            }
        }

        return $services;
    }

    /**
     * @param string $id
     *
     * @throws InvalidConfigException
     * @throws NotFoundException
     *
     * @return mixed|object
     */
    private function buildInternal(string $id)
    {
        if (!isset($this->definitions[$id])) {
            return $this->buildPrimitive($id);
        }
        $definition = DefinitionNormalizer::normalize($this->definitions[$id], $id);
        /** @psalm-suppress RedundantPropertyInitializationCheck */
        $this->dependencyResolver ??= new DependencyResolver($this->get(ContainerInterface::class));

        return $definition->resolve($this->dependencyResolver);
    }

    /**
     * @param string $class
     *
     * @throws InvalidConfigException
     * @throws NotFoundException
     *
     * @return mixed|object
     */
    private function buildPrimitive(string $class)
    {
        if ($this->isResolvable($class)) {
            /** @psalm-suppress ArgumentTypeCoercion */
            $definition = ArrayDefinition::fromPreparedData($class);
            /** @psalm-suppress RedundantPropertyInitializationCheck */
            $this->dependencyResolver ??= new DependencyResolver($this->get(ContainerInterface::class));

            return $definition->resolve($this->dependencyResolver);
        }

        throw new NotFoundException($class);
    }

    private function addProviders(array $providers): void
    {
        $extensions = [];
        foreach ($providers as $provider) {
            $providerInstance = $this->buildProvider($provider);
            $extensions[] = $providerInstance->getExtensions();
            $this->addProviderDefinitions($providerInstance);
        }

        foreach ($extensions as $providerExtensions) {
            foreach ($providerExtensions as $id => $extension) {
                if (!isset($this->definitions[$id])) {
                    throw new InvalidConfigException("Extended service \"$id\" doesn't exist.");
                }

                if (!$this->definitions[$id] instanceof ExtensibleService) {
                    $this->definitions[$id] = new ExtensibleService($this->definitions[$id]);
                }

                $this->definitions[$id]->addExtension($extension);
            }
        }
    }

    /**
     * Adds service provider definitions to the container.
     *
     * @param object $provider
     *
     * @throws InvalidConfigException
     * @throws NotInstantiableException
     *
     * @see ServiceProviderInterface
     */
    private function addProviderDefinitions($provider): void
    {
        $definitions = $provider->getDefinitions();
        $this->setMultiple($definitions);
    }

    /**
     * Builds service provider by definition.
     *
     * @param mixed $provider Class name or instance of provider.
     *
     * @throws InvalidConfigException If provider argument is not valid.
     *
     * @return ServiceProviderInterface Instance of service provider.
     *
     * @psalm-suppress MoreSpecificReturnType
     */
    private function buildProvider($provider): ServiceProviderInterface
    {
        if ($this->validate && !(is_string($provider) || is_object($provider) && $provider instanceof ServiceProviderInterface)) {
            throw new InvalidConfigException(
                sprintf(
                    'Service provider should be a class name or an instance of %s. %s given.',
                    ServiceProviderInterface::class,
                    $this->getVariableType($provider)
                )
            );
        }

        $providerInstance = is_object($provider) ? $provider : new $provider();
        if (!$providerInstance instanceof ServiceProviderInterface) {
            throw new InvalidConfigException(
                sprintf(
                    'Service provider should be an instance of %s. %s given.',
                    ServiceProviderInterface::class,
                    $this->getVariableType($providerInstance)
                )
            );
        }

        /**
         * @psalm-suppress LessSpecificReturnStatement
         */
        return $providerInstance;
    }

    /**
     * @param mixed $variable
     */
    private function getVariableType($variable): string
    {
        if (is_object($variable)) {
            return get_class($variable);
        }

        return gettype($variable);
    }
}


1		<?php
2
3		declare(strict_types=1);
4
5		namespace Yiisoft\Di;
6
7		use Closure;
8		use Psr\Container\ContainerInterface;
9		use ReflectionClass;
10		use ReflectionException;
11		use ReflectionNamedType;
12		use ReflectionUnionType;
13		use Yiisoft\Di\Contracts\ServiceProviderInterface;
14		use Yiisoft\Factory\Definition\ArrayDefinition;
15		use Yiisoft\Factory\Definition\DefinitionValidator;
16		use Yiisoft\Factory\Exception\CircularReferenceException;
17		use Yiisoft\Factory\Exception\InvalidConfigException;
18		use Yiisoft\Factory\Exception\NotFoundException;
19		use Yiisoft\Factory\Exception\NotInstantiableException;
20
21		use function array_key_exists;
22		use function array_keys;
23		use function class_exists;
24		use function get_class;
25		use function implode;
26		use function in_array;
27		use function is_array;
28		use function is_object;
29		use function is_string;
30
31		/**
32		* Container implements a [dependency injection](http://en.wikipedia.org/wiki/Dependency_injection) container.
33		*/
34		final class Container implements ContainerInterface
35		{
36		private const META_TAGS = 'tags';
37		private const META_RESET = 'reset';
38		private const ALLOWED_META = [self::META_TAGS, self::META_RESET];
39
40		/**
41		* @var array object definitions indexed by their types
42		*/
43		private array $definitions = [];
44		/**
45		* @var array used to collect ids instantiated during build
46		* to detect circular references
47		*/
48		private array $building = [];
49
50		/**
51		* @var bool $validate Validate definitions when set
52		*/
53		private bool $validate;
54
55		/**
56		* @var object[]
57		*/
58		private array $instances = [];
59
60		private array $tags;
61
62		private array $resetters = [];
63		/** @psalm-suppress PropertyNotSetInConstructor */
64		private DependencyResolver $dependencyResolver;
65
66		/**
67		* Container constructor.
68		*
69		* @param array $definitions Definitions to put into container.
70		* @param array $providers Service providers to get definitions from.
71		* lookup to when resolving dependencies. If provided the current container
72		* is no longer queried for dependencies.
73		*
74		* @throws InvalidConfigException
75		*
76		* @psalm-suppress PropertyNotSetInConstructor
77		*/
78	96	public function __construct(
79		array $definitions = [],
80		array $providers = [],
81		array $tags = [],
82		bool $validate = true
83		) {
84	96	$this->tags = $tags;
85	96	$this->validate = $validate;
86	96	$this->setDefaultDefinitions();
87	96	$this->setMultiple($definitions);
88	90	$this->addProviders($providers);
89	89	}
90
91		/**
92		* Returns a value indicating whether the container has the definition of the specified name.
93		*
94		* @param string $id class name, interface name or alias name
95		*
96		* @return bool whether the container is able to provide instance of class specified.
97		*
98		* @see set()
99		*/
100	29	public function has($id): bool
101		{
102	29	if ($this->isTagAlias($id)) {
103	2	$tag = substr($id, 4);
104	2	return isset($this->tags[$tag]);
105		}
106
107		try {
108	27	return $this->isResolvable($id);
109	1	} catch (CircularReferenceException $e) {
110	1	return false;
111		}
112		}
113
114		/**
115		* @param string $id class name, interface name or alias name
116		*
117		* @throws CircularReferenceException
118		*/
119	58	private function isResolvable($id): bool
120		{
121	58	if (isset($this->definitions[$id]) \|\| $id === StateResetter::class) {
122	27	return true;
123		}
124
125	55	if (!class_exists($id)) {
126	12	return false;
127		}
128
129	50	if (isset($this->building['class_exists'][$id])) {
130	3	throw new CircularReferenceException(sprintf(
131	3	'Circular reference to "%s" detected while building: %s.',
132		$id,
133	3	implode(',', array_keys($this->building['class_exists']))
134		));
135		}
136
137		try {
138	50	$reflectionClass = new ReflectionClass($id);
139		} catch (ReflectionException $e) {
140		return false;
141		}
142
143	50	if (!$reflectionClass->isInstantiable()) {
144		return false;
145		}
146
147	50	$constructor = $reflectionClass->getConstructor();
148
149	50	if ($constructor === null) {
150	5	return true;
151		}
152
153	48	$isResolvable = true;
154	48	$this->building['class_exists'][$id] = 1;
155
156	48	foreach ($constructor->getParameters() as $parameter) {
157	48	$type = $parameter->getType();
158
159	48	if ($parameter->isVariadic() \|\| $parameter->isOptional()) {
160
161	43	break;
162		}
163
164	18	if ($type === null \|\| $type->isBuiltin()) {
165	4	$isResolvable = false;
166	4	break;
167		}
168
169		// PHP 8 union type is used as type hint
170		/** @psalm-suppress UndefinedClass, TypeDoesNotContainType */
171	18	if ($type instanceof ReflectionUnionType) {
172		$isUnionTypeResolvable = false;
173		/** @var ReflectionNamedType $unionType */
174		foreach ($type->getTypes() as $unionType) {
175		if (!$unionType->isBuiltin()) {
176		$typeName = $unionType->getName();
177		if ($typeName === 'self') {
178		continue;
179		}
180		$isUnionTypeResolvable = $this->isResolvable($typeName);
181		}
182		}
183
184		$isResolvable = $isUnionTypeResolvable;
185		break;
186		}
187
188		/** @var ReflectionNamedType\|null $type */
189		// Our parameter has a class type hint
190	18	if ($type !== null && !$type->isBuiltin()) {
191	18	$typeName = $type->getName();
192
193	18	if ($typeName === 'self' \|\| !$this->isResolvable($typeName)) {
194	6	$isResolvable = false;
195	6	break;
196		}
197		}
198		}
199
200	45	if ($isResolvable) {
201	43	$this->definitions[$id] = $id;
202		}
203	45	unset($this->building['class_exists'][$id]);
204
205	45	return $isResolvable;
206		}
207
208		/**
209		* Returns an instance by either interface name or alias.
210		*
211		* Same instance of the class will be returned each time this method is called.
212		*
213		* @param string $id The interface or an alias name that was previously registered.
214		*
215		* @throws CircularReferenceException
216		* @throws InvalidConfigException
217		* @throws NotFoundException
218		* @throws NotInstantiableException
219		*
220		* @return mixed\|object An instance of the requested interface.
221		*
222		* @psalm-template T
223		* @psalm-param string\|class-string<T> $id
224		* @psalm-return ($id is class-string ? T : mixed)
225		*/
226	83	public function get($id)
227		{
228	83	if ($id === StateResetter::class && !isset($this->definitions[$id])) {
229	4	$resetters = [];
230	4	foreach ($this->resetters as $serviceId => $callback) {
231	4	if (isset($this->instances[$serviceId])) {
232	4	$resetters[] = $callback->bindTo($this->instances[$serviceId], get_class($this->instances[$serviceId]));
233		}
234		}
235	4	return new StateResetter($resetters, $this);
236		}
237
238	83	if (!array_key_exists($id, $this->instances)) {
239	83	$this->instances[$id] = $this->build($id);
240		}
241
242	79	return $this->instances[$id];
243		}
244
245		/**
246		* Sets a definition to the container. Definition may be defined multiple ways.
247		*
248		* @param string $id
249		* @param mixed $definition
250		*
251		* @throws InvalidConfigException
252		*
253		* @see `DefinitionNormalizer::normalize()`
254		*/
255	96	protected function set(string $id, $definition): void
256		{
257	96	[$definition, $meta] = DefinitionParser::parse($definition);
258	96	if ($this->validate) {
259	96	$this->validateDefinition($definition, $id);
260	96	$this->validateMeta($meta);
261		}
262
263	96	if (isset($meta[self::META_TAGS])) {
264	8	if ($this->validate) {
265	8	$this->validateTags($meta[self::META_TAGS]);
266		}
267	8	$this->setTags($id, $meta[self::META_TAGS]);
268		}
269	96	if (isset($meta[self::META_RESET])) {
270	5	$this->setResetter($id, $meta[self::META_RESET]);
271		}
272
273	96	unset($this->instances[$id]);
274	96	$this->definitions[$id] = $definition;
275	96	}
276
277		/**
278		* Sets multiple definitions at once.
279		*
280		* @param array $config definitions indexed by their ids
281		*
282		* @throws InvalidConfigException
283		*/
284	96	protected function setMultiple(array $config): void
285		{
286	96	foreach ($config as $id => $definition) {
287	88	if ($this->validate && !is_string($id)) {
288	1	throw new InvalidConfigException(sprintf('Key must be a string. %s given.', $this->getVariableType($id)));
289		}
290	87	$this->set($id, $definition);
291		}
292	90	}
293
294	96	private function setDefaultDefinitions(): void
295		{
296	96	$this->set(ContainerInterface::class, $this);
297	96	}
298
299		/**
300		* @param mixed $definition
301		*
302		* @throws InvalidConfigException
303		*/
304	96	private function validateDefinition($definition, ?string $id = null): void
305		{
306	96	if (is_array($definition) && isset($definition[DefinitionParser::IS_PREPARED_ARRAY_DEFINITION_DATA])) {
307	39	$class = $definition['class'];
308	39	$constructorArguments = $definition['__construct()'];
309	39	$methodsAndProperties = $definition['methodsAndProperties'];
310	39	$definition = array_merge(
311	39	$class === null ? [] : [ArrayDefinition::CLASS_NAME => $class],
312	39	[ArrayDefinition::CONSTRUCTOR => $constructorArguments],
313		$methodsAndProperties,
314		);
315		}
316
317	96	if ($definition instanceof ExtensibleService) {
318		throw new InvalidConfigException('Invalid definition. ExtensibleService is only allowed in provider extensions.');
319		}
320
321	96	DefinitionValidator::validate($definition, $id);
322	96	}
323
324		/**
325		* @throws InvalidConfigException
326		*/
327	96	private function validateMeta(array $meta): void
328		{
329	96	foreach ($meta as $key => $_value) {
330	16	if (!in_array($key, self::ALLOWED_META, true)) {
331	3	throw new InvalidConfigException(
332	3	sprintf(
333	3	'Invalid definition: metadata "%s" is not allowed. Did you mean "%s()" or "$%s"?',
334		$key,
335		$key,
336		$key,
337		)
338		);
339		}
340		}
341	96	}
342
343	8	private function validateTags(array $tags): void
344		{
345	8	foreach ($tags as $tag) {
346	8	if (!is_string($tag)) {
347		throw new InvalidConfigException('Invalid tag. Expected a string, got ' . var_export($tag, true) . '.');
348		}
349		}
350	8	}
351
352	8	private function setTags(string $id, array $tags): void
353		{
354	8	foreach ($tags as $tag) {
355	8	if (!isset($this->tags[$tag]) \|\| !in_array($id, $this->tags[$tag], true)) {
356	8	$this->tags[$tag][] = $id;
357		}
358		}
359	8	}
360
361	4	private function setResetter(string $id, Closure $resetter): void
362		{
363	4	$this->resetters[$id] = $resetter;
364	4	}
365
366		/**
367		* Creates new instance by either interface name or alias.
368		*
369		* @param string $id The interface or an alias name that was previously registered.
370		*
371		* @throws CircularReferenceException
372		* @throws InvalidConfigException
373		* @throws NotFoundException
374		*
375		* @return mixed\|object New built instance of the specified class.
376		*
377		* @internal
378		*/
379	83	private function build(string $id)
380		{
381	83	if ($this->isTagAlias($id)) {
382	9	return $this->getTaggedServices($id);
383		}
384
385	82	if (isset($this->building[$id])) {
386	78	if ($id === ContainerInterface::class) {
387	78	return $this;
388		}
389	4	throw new CircularReferenceException(sprintf(
390	4	'Circular reference to "%s" detected while building: %s.',
391		$id,
392	4	implode(',', array_keys($this->building))
393		));
394		}
395
396	82	$this->building[$id] = 1;
397		try {
398	82	$object = $this->buildInternal($id);
399	78	} finally {
400	82	unset($this->building[$id]);
401		}
402
403	78	return $object;
404		}
405
406	89	private function isTagAlias(string $id): bool
407		{
408	89	return strpos($id, 'tag@') === 0;
409		}
410
411	9	private function getTaggedServices(string $tagAlias): array
412		{
413	9	$tag = substr($tagAlias, 4);
414	9	$services = [];
415	9	if (isset($this->tags[$tag])) {
416	8	foreach ($this->tags[$tag] as $service) {
417	8	$services[] = $this->get($service);
418		}
419		}
420
421	9	return $services;
422		}
423
424		/**
425		* @param string $id
426		*
427		* @throws InvalidConfigException
428		* @throws NotFoundException
429		*
430		* @return mixed\|object
431		*/
432	82	private function buildInternal(string $id)
433		{
434	82	if (!isset($this->definitions[$id])) {
435	46	return $this->buildPrimitive($id);
436		}
437	78	$definition = DefinitionNormalizer::normalize($this->definitions[$id], $id);
438		/** @psalm-suppress RedundantPropertyInitializationCheck */
439	78	$this->dependencyResolver ??= new DependencyResolver($this->get(ContainerInterface::class));
440
441	78	return $definition->resolve($this->dependencyResolver);
442		}
443
444		/**
445		* @param string $class
446		*
447		* @throws InvalidConfigException
448		* @throws NotFoundException
449		*
450		* @return mixed\|object
451		*/
452	46	private function buildPrimitive(string $class)
453		{
454	46	if ($this->isResolvable($class)) {
455		/** @psalm-suppress ArgumentTypeCoercion */
456	41	$definition = ArrayDefinition::fromPreparedData($class);
457		/** @psalm-suppress RedundantPropertyInitializationCheck */
458	41	$this->dependencyResolver ??= new DependencyResolver($this->get(ContainerInterface::class));
459
460	41	return $definition->resolve($this->dependencyResolver);
461		}
462
463	3	throw new NotFoundException($class);
464		}
465
466	90	private function addProviders(array $providers): void
467		{
468	90	$extensions = [];
469	90	foreach ($providers as $provider) {
470	5	$providerInstance = $this->buildProvider($provider);
471	5	$extensions[] = $providerInstance->getExtensions();
472	5	$this->addProviderDefinitions($providerInstance);
473		}
474
475	90	foreach ($extensions as $providerExtensions) {
476	5	foreach ($providerExtensions as $id => $extension) {
477	4	if (!isset($this->definitions[$id])) {
478	1	throw new InvalidConfigException("Extended service \"$id\" doesn't exist.");
479		}
480
481	3	if (!$this->definitions[$id] instanceof ExtensibleService) {
482	3	$this->definitions[$id] = new ExtensibleService($this->definitions[$id]);
483		}
484
485	3	$this->definitions[$id]->addExtension($extension);
486		}
487		}
488	89	}
489
490		/**
491		* Adds service provider definitions to the container.
492		*
493		* @param object $provider
494		*
495		* @throws InvalidConfigException
496		* @throws NotInstantiableException
497		*
498		* @see ServiceProviderInterface
499		*/
500	5	private function addProviderDefinitions($provider): void
501		{
502	5	$definitions = $provider->getDefinitions();
503	5	$this->setMultiple($definitions);
504	5	}
505
506		/**
507		* Builds service provider by definition.
508		*
509		* @param mixed $provider Class name or instance of provider.
510		*
511		* @throws InvalidConfigException If provider argument is not valid.
512		*
513		* @return ServiceProviderInterface Instance of service provider.
514		*
515		* @psalm-suppress MoreSpecificReturnType
516		*/
517	5	private function buildProvider($provider): ServiceProviderInterface
518		{
519	5	if ($this->validate && !(is_string($provider) \|\| is_object($provider) && $provider instanceof ServiceProviderInterface)) {
520		throw new InvalidConfigException(
521		sprintf(
522		'Service provider should be a class name or an instance of %s. %s given.',
523		ServiceProviderInterface::class,
524		$this->getVariableType($provider)
525		)
526		);
527		}
528
529	5	$providerInstance = is_object($provider) ? $provider : new $provider();
530	5	if (!$providerInstance instanceof ServiceProviderInterface) {
531		throw new InvalidConfigException(
532		sprintf(
533		'Service provider should be an instance of %s. %s given.',
534		ServiceProviderInterface::class,
535		$this->getVariableType($providerInstance)
536		)
537		);
538		}
539
540		/**
541		* @psalm-suppress LessSpecificReturnStatement
542		*/
543	5	return $providerInstance;
544		}
545
546		/**
547		* @param mixed $variable
548		*/
549	1	private function getVariableType($variable): string
550		{
551	1	if (is_object($variable)) {
552		return get_class($variable);
553		}
554
555	1	return gettype($variable);
556		}
557		}
558

yiisoft / di

Pull Request — master (#240)

Container::isResolvable() D

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