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127 lines
4.1 KiB
PHP
127 lines
4.1 KiB
PHP
<?php
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/**
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* Interface Injector.
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*
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* @link https://www.mwpd.io/
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*
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* @copyright 2019 Alain Schlesser
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* @license MIT
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*/
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/**
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* Original code modified for this project.
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*
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* @copyright 2021 Google LLC
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* @license https://www.apache.org/licenses/LICENSE-2.0 Apache License 2.0
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*/
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declare(strict_types = 1);
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namespace Google\Web_Stories\Infrastructure;
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/**
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* The dependency injector should be the only piece of code doing actual
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* instantiations, with the following exceptions:
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* - Factories can instantiate directly.
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* - Value objects should be instantiated directly where they are being used.
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*
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* Through technical features like "binding" interfaces to classes or
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* "auto-wiring" to resolve all dependency of a class to be instantiated
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* automatically, the dependency injector allows for the largest part of the
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* code to adhere to the "Code against Interfaces, not Implementations"
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* principle.
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*
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* Finally, the dependency injector should be the only one to decide what
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* objects to "share" (always handing out the same instance) or not to share
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* (always returning a fresh new instance on each subsequent call). This
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* effectively gets rid of the dreaded Singletons.
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*
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* @internal
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*
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* @since 1.6.0
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*
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* @template T
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*/
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interface Injector extends Service {
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/**
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* Make an object instance out of an interface or class.
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*
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* @since 1.6.0
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*
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* @param string $interface_or_class Interface or class to make an object instance out of.
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* @param string[] $arguments Optional. Additional arguments to pass to the constructor.
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* Defaults to an empty array.
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* @return C Instantiated object.
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*
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* @phpstan-param class-string<C> $interface_or_class Interface or class to make an object instance out of.
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* @phpstan-param class-string[] $arguments Optional. Additional arguments to pass to the constructor.
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* Defaults to an empty array.
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*
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* @phpstan-return C
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*
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* @template C
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*/
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public function make( string $interface_or_class, array $arguments = [] );
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/**
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* Bind a given interface or class to an implementation.
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*
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* Note: The implementation can be an interface as well, as long as it can
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* be resolved to an instantiatable class at runtime.
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*
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* @since 1.6.0
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*
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* @param string $from Interface or class to bind an implementation to.
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* @param string $to Interface or class that provides the implementation.
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*
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* @phpstan-param class-string<T> $from Interface or class to bind an implementation to.
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* @phpstan-param class-string<T> $to Interface or class that provides the implementation.
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*/
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public function bind( string $from, string $to ): Injector;
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/**
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* Bind an argument for a class to a specific value.
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*
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* @since 1.6.0
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*
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* @param string $interface_or_class Interface or class to bind an argument
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* for.
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* @param string $argument_name Argument name to bind a value to.
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* @param mixed $value Value to bind the argument to.
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*
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* @phpstan-param class-string<T> $interface_or_class Interface or class to bind an argument
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*/
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public function bind_argument(
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string $interface_or_class,
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string $argument_name,
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$value
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): Injector;
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/**
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* Always reuse and share the same instance for the provided interface or
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* class.
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*
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* @since 1.6.0
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*
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* @param string $interface_or_class Interface or class to reuse.
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*
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* @phpstan-param class-string<T> $interface_or_class Interface or class to reuse.
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*/
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public function share( string $interface_or_class ): Injector;
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/**
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* Delegate instantiation of an interface or class to a callable.
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*
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* @since 1.6.0
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*
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* @param string $interface_or_class Interface or class to delegate the
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* instantiation of.
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* @param callable $callback Callable to use for instantiation.
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*
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* @phpstan-param class-string<T> $interface_or_class Interface or class to delegate the
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* instantiation of.
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*/
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public function delegate( string $interface_or_class, callable $callback ): Injector;
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}
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