Container::decorateLazy() - Code Metrics - Inspection of "Lazy services" - yiisoft/di - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Pull Request — master (#232)

by Dmitriy

created 2023-07-29 14:17 UTC

Container::decorateLazy() A

↳ Parent: Container

Complexity

Conditions	5
Paths	3

Size

Total Lines	17
Code Lines	11

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	6
CRAP Score	8.9038

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
cc	5
eloc	11
c	1
b	0
f	0
nc	3
nop	2
dl	0
loc	17
ccs	6
cts	13
cp	0.4615
crap	8.9038
rs	9.6111

<?php

declare(strict_types=1);

namespace Yiisoft\Di;

use Closure;
use Psr\Container\ContainerExceptionInterface;
use Psr\Container\ContainerInterface;
use Psr\Container\NotFoundExceptionInterface;
use Throwable;
use Yiisoft\Definitions\ArrayDefinition;
use Yiisoft\Definitions\DefinitionStorage;
use Yiisoft\Definitions\Contract\DefinitionInterface;
use Yiisoft\Definitions\Exception\CircularReferenceException;
use Yiisoft\Definitions\Exception\InvalidConfigException;
use Yiisoft\Definitions\Exception\NotInstantiableException;
use Yiisoft\Definitions\Helpers\DefinitionValidator;
use Yiisoft\Definitions\LazyDefinition;
use Yiisoft\Di\Helpers\DefinitionNormalizer;
use Yiisoft\Di\Helpers\DefinitionParser;
use Yiisoft\Di\Helpers\TagHelper;

use function array_key_exists;
use function array_keys;
use function implode;
use function in_array;
use function is_array;
use function is_callable;
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 META_LAZY = 'lazy';
    private const ALLOWED_META = [self::META_TAGS, self::META_RESET, self::META_LAZY];

    /**
     * @var DefinitionStorage Storage of object definitions.
     */
    private DefinitionStorage $definitions;

    /**
     * @var array Used to collect IDs of objects instantiated during build
     * to detect circular references.
     */
    private array $building = [];

    /**
     * @var bool $validate If definitions should be validated.
     */
    private bool $validate;

    private array $instances = [];

    private CompositeContainer $delegates;

    /**
     * @var array Tagged service IDs. The structure is `['tagID' => ['service1', 'service2']]`.
     * @psalm-var array<string, list<string>>
     */
    private array $tags;

    /**
     * @var Closure[]
     */
    private array $resetters = [];
    private bool $useResettersFromMeta = true;

    /**
     * @param ContainerConfigInterface $config Container configuration.
     *
     * @throws InvalidConfigException If configuration is not valid.
     */
    public function __construct(ContainerConfigInterface $config)
    {
        $this->definitions = new DefinitionStorage(
            [
                ContainerInterface::class => $this,
                StateResetter::class => StateResetter::class,
            ],
            $config->useStrictMode()
        );
        $this->validate = $config->shouldValidate();
        $this->setTags($config->getTags());
        $this->addDefinitions($config->getDefinitions());
        $this->addProviders($config->getProviders());
        $this->setDelegates($config->getDelegates());
    }

    /**
     * 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 addDefinition()
     */
    public function has(string $id): bool
    {
        if (TagHelper::isTagAlias($id)) {
            $tag = TagHelper::extractTagFromAlias($id);
            return isset($this->tags[$tag]);
        }

        try {
            return $this->definitions->has($id);
        } catch (CircularReferenceException) {
            return true;
        }
    }

    /**
     * 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 NotFoundExceptionInterface
     * @throws NotInstantiableException
     * @throws BuildingException
     *
     * @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(string $id)
    {
        if (!array_key_exists($id, $this->instances)) {
            try {
                try {
                    $this->instances[$id] = $this->build($id);
                } catch (NotFoundExceptionInterface $e) {
                    if (!$this->delegates->has($id)) {
                        throw $e;
                    }

                    /** @psalm-suppress MixedReturnStatement */
                    return $this->delegates->get($id);
                }
            } catch (Throwable $e) {
                if ($e instanceof ContainerExceptionInterface && !$e instanceof InvalidConfigException) {
                    throw $e;
                }
                throw new BuildingException($id, $e, $this->definitions->getBuildStack(), $e);
            }
        }

        if ($id === StateResetter::class) {
            $delegatesResetter = null;
            if ($this->delegates->has(StateResetter::class)) {
                $delegatesResetter = $this->delegates->get(StateResetter::class);
            }

            /** @var StateResetter $mainResetter */
            $mainResetter = $this->instances[$id];

            if ($this->useResettersFromMeta) {
                /** @var StateResetter[] $resetters */
                $resetters = [];
                foreach ($this->resetters as $serviceId => $callback) {
                    if (isset($this->instances[$serviceId])) {
                        $resetters[$serviceId] = $callback;
                    }
                }
                if ($delegatesResetter !== null) {
                    $resetters[] = $delegatesResetter;
                }
                $mainResetter->setResetters($resetters);
            } elseif ($delegatesResetter !== null) {
                $resetter = new StateResetter($this->get(ContainerInterface::class));
                $resetter->setResetters([$mainResetter, $delegatesResetter]);

                return $resetter;
            }
        }

        /** @psalm-suppress MixedReturnStatement */
        return $this->instances[$id];
    }

    /**
     * Sets a definition to the container. Definition may be defined multiple ways.
     *
     * @param string $id ID to set definition for.
     * @param mixed $definition Definition to set.
     *
     * @throws InvalidConfigException
     *
     * @see DefinitionNormalizer::normalize()
     */
    private function addDefinition(string $id, mixed $definition): void
    {
        /** @var mixed $definition */
        [$definition, $meta] = DefinitionParser::parse($definition);
        if ($this->validate) {
            $this->validateDefinition($definition, $id);
            $this->validateMeta($meta);
        }
        /**
         * @psalm-var array{reset?:Closure,tags?:string[]} $meta
         */

        if (isset($meta[self::META_TAGS])) {
            $this->setDefinitionTags($id, $meta[self::META_TAGS]);
        }
        if (isset($meta[self::META_RESET])) {
            $this->setDefinitionResetter($id, $meta[self::META_RESET]);
        }
        if (isset($meta[self::META_LAZY]) && $meta[self::META_LAZY] === true) {
            $definition = $this->decorateLazy($id, $definition);
        }

        unset($this->instances[$id]);
        $this->addDefinitionToStorage($id, $definition);
    }

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

            $this->addDefinition($id, $definition);
        }
    }

    /**
     * Set container delegates.
     *
     * Each delegate must is a callable in format "function (ContainerInterface $container): ContainerInterface".
     * The container instance returned is used in case a service can not be found in primary container.
     *
     * @param array $delegates
     *
     * @throws InvalidConfigException
     */
    private function setDelegates(array $delegates): void
    {
        $this->delegates = new CompositeContainer();
        $container = $this->get(ContainerInterface::class);

        foreach ($delegates as $delegate) {
            if (!$delegate instanceof Closure) {
                throw new InvalidConfigException(
                    'Delegate must be callable in format "function (ContainerInterface $container): ContainerInterface".'
                );
            }

            /** @var ContainerInterface */
            $delegate = $delegate($container);

            if (!$delegate instanceof ContainerInterface) {
                throw new InvalidConfigException(
                    'Delegate callable must return an object that implements ContainerInterface.'
                );
            }

            $this->delegates->attach($delegate);
        }
        $this->definitions->setDelegateContainer($this->delegates);
    }

    /**
     * @param mixed $definition Definition to validate.
     * @param string|null $id ID of the definition to validate.
     *
     * @throws InvalidConfigException
     */
    private function validateDefinition(mixed $definition, ?string $id = null): void
    {
        if (is_array($definition) && isset($definition[DefinitionParser::IS_PREPARED_ARRAY_DEFINITION_DATA])) {
            /** @var mixed $class */
            $class = $definition['class'];

            /** @var mixed $constructorArguments */
            $constructorArguments = $definition['__construct()'];

            /**
             * @var array $methodsAndProperties Is always array for prepared array definition data.
             *
             * @see DefinitionParser::parse()
             */
            $methodsAndProperties = $definition['methodsAndProperties'];

            $definition = array_merge(
                $class === null ? [] : [ArrayDefinition::CLASS_NAME => $class],
                [ArrayDefinition::CONSTRUCTOR => $constructorArguments],
                // extract only value from parsed definition method
                array_map(fn (array $data): mixed => $data[2], $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
    {
        /** @var mixed $value */
        foreach ($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,
                    )
                );
            }

            if ($key === self::META_TAGS) {
                $this->validateDefinitionTags($value);
            }

            if ($key === self::META_RESET) {
                $this->validateDefinitionReset($value);
            }
        }
    }

    /**
     * @throws InvalidConfigException
     */
    private function validateDefinitionTags(mixed $tags): void
    {
        if (!is_array($tags)) {
            throw new InvalidConfigException(
                sprintf(
                    'Invalid definition: tags should be array of strings, %s given.',
                    get_debug_type($tags)
                )
            );
        }

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

    /**
     * @throws InvalidConfigException
     */
    private function validateDefinitionReset(mixed $reset): void
    {
        if (!$reset instanceof Closure) {
            throw new InvalidConfigException(
                sprintf(
                    'Invalid definition: "reset" should be closure, %s given.',
                    get_debug_type($reset)
                )
            );
        }
    }

    /**
     * @throws InvalidConfigException
     */
    private function setTags(array $tags): void
    {
        if ($this->validate) {
            foreach ($tags as $tag => $services) {
                if (!is_string($tag)) {
                    throw new InvalidConfigException(
                        sprintf(
                            'Invalid tags configuration: tag should be string, %s given.',
                            $tag
                        )
                    );
                }
                if (!is_array($services)) {
                    throw new InvalidConfigException(
                        sprintf(
                            'Invalid tags configuration: tag should contain array of service IDs, %s given.',
                            get_debug_type($services)
                        )
                    );
                }
                /** @var mixed $service */
                foreach ($services as $service) {
                    if (!is_string($service)) {
                        throw new InvalidConfigException(
                            sprintf(
                                'Invalid tags configuration: service should be defined as class string, %s given.',
                                get_debug_type($service)
                            )
                        );
                    }
                }
            }
        }
        /** @psalm-var array<string, list<string>> $tags */

        $this->tags = $tags;
    }

    /**
     * @psalm-param string[] $tags
     */
    private function setDefinitionTags(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 setDefinitionResetter(string $id, Closure $resetter): void
    {
        $this->resetters[$id] = $resetter;
    }

    /**
     * Add definition to storage.
     *
     * @param string $id ID to set definition for.
     * @param mixed|object $definition Definition to set.
     *
     * @see $definitions
     */
    private function addDefinitionToStorage(string $id, $definition): void
    {
        $this->definitions->set($id, $definition);

        if ($id === StateResetter::class) {
            $this->useResettersFromMeta = false;
        }
    }

    /**
     * Creates new instance by either interface name or alias.
     *
     * @param string $id The interface or an alias name that was previously registered.
     *
     * @throws InvalidConfigException
     * @throws NotFoundExceptionInterface
     * @throws CircularReferenceException
     *
     * @return mixed|object New built instance of the specified class.
     *
     * @internal
     */
    private function build(string $id)
    {
        if (TagHelper::isTagAlias($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 {
            /** @var mixed $object */
            $object = $this->buildInternal($id);
        } finally {
            unset($this->building[$id]);
        }

        return $object;
    }

    private function getTaggedServices(string $tagAlias): array
    {
        $tag = TagHelper::extractTagFromAlias($tagAlias);
        $services = [];
        if (isset($this->tags[$tag])) {
            foreach ($this->tags[$tag] as $service) {
                /** @var mixed */
                $services[] = $this->get($service);
            }
        }

        return $services;
    }

    /**
     * @throws NotFoundExceptionInterface
     * @throws InvalidConfigException
     *
     * @return mixed|object
     */
    private function buildInternal(string $id)
    {
        if ($this->definitions->has($id)) {
            $definition = DefinitionNormalizer::normalize($this->definitions->get($id), $id);

            return $definition->resolve($this->get(ContainerInterface::class));
        }

        throw new NotFoundException($id, $this->definitions->getBuildStack());
    }

    /**
     * @throws CircularReferenceException
     * @throws InvalidConfigException
     */
    private function addProviders(array $providers): void
    {
        $extensions = [];
        /** @var mixed $provider */
        foreach ($providers as $provider) {
            $providerInstance = $this->buildProvider($provider);
            $extensions[] = $providerInstance->getExtensions();
            $this->addDefinitions($providerInstance->getDefinitions());
        }

        foreach ($extensions as $providerExtensions) {
            /** @var mixed $extension */
            foreach ($providerExtensions as $id => $extension) {
                if (!is_string($id)) {
                    throw new InvalidConfigException(
                        sprintf('Extension key must be a service ID as string, %s given.', $id)
                    );
                }

                if ($id === ContainerInterface::class) {
                    throw new InvalidConfigException('ContainerInterface extensions are not allowed.');
                }

                if (!$this->definitions->has($id)) {
                    throw new InvalidConfigException("Extended service \"$id\" doesn't exist.");
                }

                if (!is_callable($extension)) {
                    throw new InvalidConfigException(
                        sprintf(
                            'Extension of service should be callable, %s given.',
                            get_debug_type($extension)
                        )
                    );
                }

                /** @var mixed $definition */
                $definition = $this->definitions->get($id);
                if (!$definition instanceof ExtensibleService) {
                    $definition = new ExtensibleService($definition, $id);
                    $this->addDefinitionToStorage($id, $definition);
                }

                $definition->addExtension($extension);
            }
        }
    }

    /**
     * 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.
     */
    private function buildProvider(mixed $provider): ServiceProviderInterface
    {
        if ($this->validate && !(is_string($provider) || $provider instanceof ServiceProviderInterface)) {
            throw new InvalidConfigException(
                sprintf(
                    'Service provider should be a class name or an instance of %s. %s given.',
                    ServiceProviderInterface::class,
                    get_debug_type($provider)
                )
            );
        }

        /**
         * @psalm-suppress MixedMethodCall Service provider defined as class string
         * should container public constructor, otherwise throws error.
         */
        $providerInstance = is_object($provider) ? $provider : new $provider();
        if (!$providerInstance instanceof ServiceProviderInterface) {
            throw new InvalidConfigException(
                sprintf(
                    'Service provider should be an instance of %s. %s given.',
                    ServiceProviderInterface::class,
                    get_debug_type($providerInstance)
                )
            );
        }

        return $providerInstance;
    }

    private function decorateLazy(string $id, mixed $definition): DefinitionInterface
    {
        if (class_exists($id) || interface_exists($id)) {
            $class = $id;
        } elseif (is_array($definition) && array_key_exists(ArrayDefinition::CLASS_NAME, $definition)) {
            $class = (string) $definition[ArrayDefinition::CLASS_NAME];
        } else {
            throw new InvalidConfigException(
                sprintf(
                    'Invalid definition: lazy services are only available with array definitions or references. Got type "%s" for definition ID: "%s"',
                    get_debug_type($definition),
                    $id,
                )
            );
        }

        return new LazyDefinition($definition, $class);
    }
}


1		<?php
2
3		declare(strict_types=1);
4
5		namespace Yiisoft\Di;
6
7		use Closure;
8		use Psr\Container\ContainerExceptionInterface;
9		use Psr\Container\ContainerInterface;
10		use Psr\Container\NotFoundExceptionInterface;
11		use Throwable;
12		use Yiisoft\Definitions\ArrayDefinition;
13		use Yiisoft\Definitions\DefinitionStorage;
14		use Yiisoft\Definitions\Contract\DefinitionInterface;
15		use Yiisoft\Definitions\Exception\CircularReferenceException;
16		use Yiisoft\Definitions\Exception\InvalidConfigException;
17		use Yiisoft\Definitions\Exception\NotInstantiableException;
18		use Yiisoft\Definitions\Helpers\DefinitionValidator;
19		use Yiisoft\Definitions\LazyDefinition;
20		use Yiisoft\Di\Helpers\DefinitionNormalizer;
21		use Yiisoft\Di\Helpers\DefinitionParser;
22		use Yiisoft\Di\Helpers\TagHelper;
23
24		use function array_key_exists;
25		use function array_keys;
26		use function implode;
27		use function in_array;
28		use function is_array;
29		use function is_callable;
30		use function is_object;
31		use function is_string;
32
33		/**
34		* Container implements a [dependency injection](http://en.wikipedia.org/wiki/Dependency_injection) container.
35		*/
36		final class Container implements ContainerInterface
37		{
38		private const META_TAGS = 'tags';
39		private const META_RESET = 'reset';
40		private const META_LAZY = 'lazy';
41		private const ALLOWED_META = [self::META_TAGS, self::META_RESET, self::META_LAZY];
42
43		/**
44		* @var DefinitionStorage Storage of object definitions.
45		*/
46		private DefinitionStorage $definitions;
47
48		/**
49		* @var array Used to collect IDs of objects instantiated during build
50		* to detect circular references.
51		*/
52		private array $building = [];
53
54		/**
55		* @var bool $validate If definitions should be validated.
56		*/
57		private bool $validate;
58
59		private array $instances = [];
60
61		private CompositeContainer $delegates;
62
63		/**
64		* @var array Tagged service IDs. The structure is `['tagID' => ['service1', 'service2']]`.
65		* @psalm-var array<string, list<string>>
66		*/
67		private array $tags;
68
69		/**
70		* @var Closure[]
71		*/
72		private array $resetters = [];
73		private bool $useResettersFromMeta = true;
74
75		/**
76		* @param ContainerConfigInterface $config Container configuration.
77		*
78		* @throws InvalidConfigException If configuration is not valid.
79		*/
80	144	public function __construct(ContainerConfigInterface $config)
81		{
82	144	$this->definitions = new DefinitionStorage(
83	144	[
84	144	ContainerInterface::class => $this,
85	144	StateResetter::class => StateResetter::class,
86	144	],
87	144	$config->useStrictMode()
88	144	);
89	144	$this->validate = $config->shouldValidate();
90	144	$this->setTags($config->getTags());
91	141	$this->addDefinitions($config->getDefinitions());
92	131	$this->addProviders($config->getProviders());
93	125	$this->setDelegates($config->getDelegates());
94		}
95
96		/**
97		* Returns a value indicating whether the container has the definition of the specified name.
98		*
99		* @param string $id Class name, interface name or alias name.
100		*
101		* @return bool Whether the container is able to provide instance of class specified.
102		*
103		* @see addDefinition()
104		*/
105	47	public function has(string $id): bool
106		{
107	47	if (TagHelper::isTagAlias($id)) {
108	3	$tag = TagHelper::extractTagFromAlias($id);
109	3	return isset($this->tags[$tag]);
110		}
111
112		try {
113	44	return $this->definitions->has($id);
114	3	} catch (CircularReferenceException) {
115	3	return true;
116		}
117		}
118
119		/**
120		* Returns an instance by either interface name or alias.
121		*
122		* Same instance of the class will be returned each time this method is called.
123		*
124		* @param string $id The interface or an alias name that was previously registered.
125		*
126		* @throws CircularReferenceException
127		* @throws InvalidConfigException
128		* @throws NotFoundExceptionInterface
129		* @throws NotInstantiableException
130		* @throws BuildingException
131		*
132		* @return mixed\|object An instance of the requested interface.
133		*
134		* @psalm-template T
135		* @psalm-param string\|class-string<T> $id
136		* @psalm-return ($id is class-string ? T : mixed)
137		*/
138	125	public function get(string $id)
139		{
140	125	if (!array_key_exists($id, $this->instances)) {
141		try {
142		try {
143	125	$this->instances[$id] = $this->build($id);
144	21	} catch (NotFoundExceptionInterface $e) {
145	12	if (!$this->delegates->has($id)) {
146	9	throw $e;
147		}
148
149		/** @psalm-suppress MixedReturnStatement */
150	125	return $this->delegates->get($id);
151		}
152	18	} catch (Throwable $e) {
153	18	if ($e instanceof ContainerExceptionInterface && !$e instanceof InvalidConfigException) {
154	16	throw $e;
155		}
156	2	throw new BuildingException($id, $e, $this->definitions->getBuildStack(), $e);
157		}
158		}
159
160	125	if ($id === StateResetter::class) {
161	10	$delegatesResetter = null;
162	10	if ($this->delegates->has(StateResetter::class)) {
163	2	$delegatesResetter = $this->delegates->get(StateResetter::class);
164		}
165
166		/** @var StateResetter $mainResetter */
167	10	$mainResetter = $this->instances[$id];
168
169	10	if ($this->useResettersFromMeta) {
170		/** @var StateResetter[] $resetters */
171	7	$resetters = [];
172	7	foreach ($this->resetters as $serviceId => $callback) {
173	7	if (isset($this->instances[$serviceId])) {
174	7	$resetters[$serviceId] = $callback;
175		}
176		}
177	7	if ($delegatesResetter !== null) {
178	1	$resetters[] = $delegatesResetter;
179		}
180	7	$mainResetter->setResetters($resetters);
181	5	} elseif ($delegatesResetter !== null) {
182	1	$resetter = new StateResetter($this->get(ContainerInterface::class));
183	1	$resetter->setResetters([$mainResetter, $delegatesResetter]);
184
185	1	return $resetter;
186		}
187		}
188
189		/** @psalm-suppress MixedReturnStatement */
190	125	return $this->instances[$id];
191		}
192
193		/**
194		* Sets a definition to the container. Definition may be defined multiple ways.
195		*
196		* @param string $id ID to set definition for.
197		* @param mixed $definition Definition to set.
198		*
199		* @throws InvalidConfigException
200		*
201		* @see DefinitionNormalizer::normalize()
202		*/
203	116	private function addDefinition(string $id, mixed $definition): void
204		{
205		/** @var mixed $definition */
206	116	[$definition, $meta] = DefinitionParser::parse($definition);
207	116	if ($this->validate) {
208	116	$this->validateDefinition($definition, $id);
209	113	$this->validateMeta($meta);
210		}
211		/**
212		* @psalm-var array{reset?:Closure,tags?:string[]} $meta
213		*/
214
215	107	if (isset($meta[self::META_TAGS])) {
216	9	$this->setDefinitionTags($id, $meta[self::META_TAGS]);
217		}
218	107	if (isset($meta[self::META_RESET])) {
219	7	$this->setDefinitionResetter($id, $meta[self::META_RESET]);
220		}
221	107	if (isset($meta[self::META_LAZY]) && $meta[self::META_LAZY] === true) {
222	5	$definition = $this->decorateLazy($id, $definition);
223		}
224
225	107	unset($this->instances[$id]);
226	107	$this->addDefinitionToStorage($id, $definition);
227		}
228
229		/**
230		* Sets multiple definitions at once.
231		*
232		* @param array $config Definitions indexed by their IDs.
233		*
234		* @throws InvalidConfigException
235		*/
236	141	private function addDefinitions(array $config): void
237		{
238		/** @var mixed $definition */
239	141	foreach ($config as $id => $definition) {
240	115	if ($this->validate && !is_string($id)) {
241	1	throw new InvalidConfigException(
242	1	sprintf(
243	1	'Key must be a string. %s given.',
244	1	get_debug_type($id)
245	1	)
246	1	);
247		}
248		/** @var string $id */
249
250	114	$this->addDefinition($id, $definition);
251		}
252		}
253
254		/**
255		* Set container delegates.
256		*
257		* Each delegate must is a callable in format "function (ContainerInterface $container): ContainerInterface".
258		* The container instance returned is used in case a service can not be found in primary container.
259		*
260		* @param array $delegates
261		*
262		* @throws InvalidConfigException
263		*/
264	125	private function setDelegates(array $delegates): void
265		{
266	125	$this->delegates = new CompositeContainer();
267	125	$container = $this->get(ContainerInterface::class);
268
269	125	foreach ($delegates as $delegate) {
270	6	if (!$delegate instanceof Closure) {
271	1	throw new InvalidConfigException(
272	1	'Delegate must be callable in format "function (ContainerInterface $container): ContainerInterface".'
273	1	);
274		}
275
276		/** @var ContainerInterface */
277	5	$delegate = $delegate($container);
278
279	5	if (!$delegate instanceof ContainerInterface) {
280	1	throw new InvalidConfigException(
281	1	'Delegate callable must return an object that implements ContainerInterface.'
282	1	);
283		}
284
285	4	$this->delegates->attach($delegate);
286		}
287	123	$this->definitions->setDelegateContainer($this->delegates);
288		}
289
290		/**
291		* @param mixed $definition Definition to validate.
292		* @param string\|null $id ID of the definition to validate.
293		*
294		* @throws InvalidConfigException
295		*/
296	116	private function validateDefinition(mixed $definition, ?string $id = null): void
297		{
298	116	if (is_array($definition) && isset($definition[DefinitionParser::IS_PREPARED_ARRAY_DEFINITION_DATA])) {
299		/** @var mixed $class */
300	50	$class = $definition['class'];
301
302		/** @var mixed $constructorArguments */
303	50	$constructorArguments = $definition['__construct()'];
304
305		/**
306		* @var array $methodsAndProperties Is always array for prepared array definition data.
307		*
308		* @see DefinitionParser::parse()
309		*/
310	50	$methodsAndProperties = $definition['methodsAndProperties'];
311
312	50	$definition = array_merge(
313	50	$class === null ? [] : [ArrayDefinition::CLASS_NAME => $class],
314	50	[ArrayDefinition::CONSTRUCTOR => $constructorArguments],
315		// extract only value from parsed definition method
316	50	array_map(fn (array $data): mixed => $data[2], $methodsAndProperties),
317	50	);
318		}
319
320	116	if ($definition instanceof ExtensibleService) {
321	1	throw new InvalidConfigException(
322	1	'Invalid definition. ExtensibleService is only allowed in provider extensions.'
323	1	);
324		}
325
326	115	DefinitionValidator::validate($definition, $id);
327		}
328
329		/**
330		* @throws InvalidConfigException
331		*/
332	113	private function validateMeta(array $meta): void
333		{
334		/** @var mixed $value */
335	113	foreach ($meta as $key => $value) {
336	27	if (!in_array($key, self::ALLOWED_META, true)) {
337	3	throw new InvalidConfigException(
338	3	sprintf(
339	3	'Invalid definition: metadata "%s" is not allowed. Did you mean "%s()" or "$%s"?',
340	3	$key,
341	3	$key,
342	3	$key,
343	3	)
344	3	);
345		}
346
347	25	if ($key === self::META_TAGS) {
348	12	$this->validateDefinitionTags($value);
349		}
350
351	23	if ($key === self::META_RESET) {
352	8	$this->validateDefinitionReset($value);
353		}
354		}
355		}
356
357		/**
358		* @throws InvalidConfigException
359		*/
360	12	private function validateDefinitionTags(mixed $tags): void
361		{
362	12	if (!is_array($tags)) {
363	1	throw new InvalidConfigException(
364	1	sprintf(
365	1	'Invalid definition: tags should be array of strings, %s given.',
366	1	get_debug_type($tags)
367	1	)
368	1	);
369		}
370
371	11	foreach ($tags as $tag) {
372	11	if (!is_string($tag)) {
373	1	throw new InvalidConfigException('Invalid tag. Expected a string, got ' . var_export($tag, true) . '.');
374		}
375		}
376		}
377
378		/**
379		* @throws InvalidConfigException
380		*/
381	8	private function validateDefinitionReset(mixed $reset): void
382		{
383	8	if (!$reset instanceof Closure) {
384	1	throw new InvalidConfigException(
385	1	sprintf(
386	1	'Invalid definition: "reset" should be closure, %s given.',
387	1	get_debug_type($reset)
388	1	)
389	1	);
390		}
391		}
392
393		/**
394		* @throws InvalidConfigException
395		*/
396	144	private function setTags(array $tags): void
397		{
398	144	if ($this->validate) {
399	144	foreach ($tags as $tag => $services) {
400	5	if (!is_string($tag)) {
401	1	throw new InvalidConfigException(
402	1	sprintf(
403	1	'Invalid tags configuration: tag should be string, %s given.',
404	1	$tag
405	1	)
406	1	);
407		}
408	4	if (!is_array($services)) {
409	1	throw new InvalidConfigException(
410	1	sprintf(
411	1	'Invalid tags configuration: tag should contain array of service IDs, %s given.',
412	1	get_debug_type($services)
413	1	)
414	1	);
415		}
416		/** @var mixed $service */
417	3	foreach ($services as $service) {
418	3	if (!is_string($service)) {
419	1	throw new InvalidConfigException(
420	1	sprintf(
421	1	'Invalid tags configuration: service should be defined as class string, %s given.',
422	1	get_debug_type($service)
423	1	)
424	1	);
425		}
426		}
427		}
428		}
429		/** @psalm-var array<string, list<string>> $tags */
430
431	141	$this->tags = $tags;
432		}
433
434		/**
435		* @psalm-param string[] $tags
436		*/
437	9	private function setDefinitionTags(string $id, array $tags): void
438		{
439	9	foreach ($tags as $tag) {
440	9	if (!isset($this->tags[$tag]) \|\| !in_array($id, $this->tags[$tag], true)) {
441	9	$this->tags[$tag][] = $id;
442		}
443		}
444		}
445
446	7	private function setDefinitionResetter(string $id, Closure $resetter): void
447		{
448	7	$this->resetters[$id] = $resetter;
449		}
450
451		/**
452		* Add definition to storage.
453		*
454		* @param string $id ID to set definition for.
455		* @param mixed\|object $definition Definition to set.
456		*
457		* @see $definitions
458		*/
459	107	private function addDefinitionToStorage(string $id, $definition): void
460		{
461	107	$this->definitions->set($id, $definition);
462
463	107	if ($id === StateResetter::class) {
464	5	$this->useResettersFromMeta = false;
465		}
466		}
467
468		/**
469		* Creates new instance by either interface name or alias.
470		*
471		* @param string $id The interface or an alias name that was previously registered.
472		*
473		* @throws InvalidConfigException
474		* @throws NotFoundExceptionInterface
475		* @throws CircularReferenceException
476		*
477		* @return mixed\|object New built instance of the specified class.
478		*
479		* @internal
480		*/
481	125	private function build(string $id)
482		{
483	125	if (TagHelper::isTagAlias($id)) {
484	10	return $this->getTaggedServices($id);
485		}
486
487	125	if (isset($this->building[$id])) {
488	125	if ($id === ContainerInterface::class) {
489	125	return $this;
490		}
491	4	throw new CircularReferenceException(
492	4	sprintf(
493	4	'Circular reference to "%s" detected while building: %s.',
494	4	$id,
495	4	implode(', ', array_keys($this->building))
496	4	)
497	4	);
498		}
499
500	125	$this->building[$id] = 1;
501		try {
502		/** @var mixed $object */
503	125	$object = $this->buildInternal($id);
504		} finally {
505	125	unset($this->building[$id]);
506		}
507
508	125	return $object;
509		}
510
511	10	private function getTaggedServices(string $tagAlias): array
512		{
513	10	$tag = TagHelper::extractTagFromAlias($tagAlias);
514	10	$services = [];
515	10	if (isset($this->tags[$tag])) {
516	9	foreach ($this->tags[$tag] as $service) {
517		/** @var mixed */
518	9	$services[] = $this->get($service);
519		}
520		}
521
522	10	return $services;
523		}
524
525		/**
526		* @throws NotFoundExceptionInterface
527		* @throws InvalidConfigException
528		*
529		* @return mixed\|object
530		*/
531	125	private function buildInternal(string $id)
532		{
533	125	if ($this->definitions->has($id)) {
534	125	$definition = DefinitionNormalizer::normalize($this->definitions->get($id), $id);
535
536	125	return $definition->resolve($this->get(ContainerInterface::class));
537		}
538
539	12	throw new NotFoundException($id, $this->definitions->getBuildStack());
540		}
541
542		/**
543		* @throws CircularReferenceException
544		* @throws InvalidConfigException
545		*/
546	131	private function addProviders(array $providers): void
547		{
548	131	$extensions = [];
549		/** @var mixed $provider */
550	131	foreach ($providers as $provider) {
551	16	$providerInstance = $this->buildProvider($provider);
552	14	$extensions[] = $providerInstance->getExtensions();
553	14	$this->addDefinitions($providerInstance->getDefinitions());
554		}
555
556	129	foreach ($extensions as $providerExtensions) {
557		/** @var mixed $extension */
558	14	foreach ($providerExtensions as $id => $extension) {
559	10	if (!is_string($id)) {
560	1	throw new InvalidConfigException(
561	1	sprintf('Extension key must be a service ID as string, %s given.', $id)
562	1	);
563		}
564
565	9	if ($id === ContainerInterface::class) {
566	1	throw new InvalidConfigException('ContainerInterface extensions are not allowed.');
567		}
568
569	8	if (!$this->definitions->has($id)) {
570	1	throw new InvalidConfigException("Extended service \"$id\" doesn't exist.");
571		}
572
573	8	if (!is_callable($extension)) {
574	1	throw new InvalidConfigException(
575	1	sprintf(
576	1	'Extension of service should be callable, %s given.',
577	1	get_debug_type($extension)
578	1	)
579	1	);
580		}
581
582		/** @var mixed $definition */
583	7	$definition = $this->definitions->get($id);
584	7	if (!$definition instanceof ExtensibleService) {
585	7	$definition = new ExtensibleService($definition, $id);
586	7	$this->addDefinitionToStorage($id, $definition);
587		}
588
589	7	$definition->addExtension($extension);
590		}
591		}
592		}
593
594		/**
595		* Builds service provider by definition.
596		*
597		* @param mixed $provider Class name or instance of provider.
598		*
599		* @throws InvalidConfigException If provider argument is not valid.
600		*
601		* @return ServiceProviderInterface Instance of service provider.
602		*/
603	16	private function buildProvider(mixed $provider): ServiceProviderInterface
604		{
605	16	if ($this->validate && !(is_string($provider) \|\| $provider instanceof ServiceProviderInterface)) {
606	1	throw new InvalidConfigException(
607	1	sprintf(
608	1	'Service provider should be a class name or an instance of %s. %s given.',
609	1	ServiceProviderInterface::class,
610	1	get_debug_type($provider)
611	1	)
612	1	);
613		}
614
615		/**
616		* @psalm-suppress MixedMethodCall Service provider defined as class string
617		* should container public constructor, otherwise throws error.
618		*/
619	15	$providerInstance = is_object($provider) ? $provider : new $provider();
620	15	if (!$providerInstance instanceof ServiceProviderInterface) {
621	1	throw new InvalidConfigException(
622	1	sprintf(
623	1	'Service provider should be an instance of %s. %s given.',
624	1	ServiceProviderInterface::class,
625	1	get_debug_type($providerInstance)
626	1	)
627	1	);
628		}
629
630	14	return $providerInstance;
631		}
632
633	5	private function decorateLazy(string $id, mixed $definition): DefinitionInterface
634		{
635	5	if (class_exists($id) \|\| interface_exists($id)) {
636	4	$class = $id;
637	1	} elseif (is_array($definition) && array_key_exists(ArrayDefinition::CLASS_NAME, $definition)) {
638	1	$class = (string) $definition[ArrayDefinition::CLASS_NAME];
639		} else {
640		throw new InvalidConfigException(
641		sprintf(
642		'Invalid definition: lazy services are only available with array definitions or references. Got type "%s" for definition ID: "%s"',
643		get_debug_type($definition),
644		$id,
645		)
646		);
647		}
648
649	5	return new LazyDefinition($definition, $class);
650		}
651		}
652

yiisoft / di

Pull Request — master (#232)

Container::decorateLazy() A

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