<?php
declare(strict_types=1);
namespace DI;
use DI\Compiler\Compiler;
use DI\Definition\Source\AttributeBasedAutowiring;
use DI\Definition\Source\DefinitionArray;
use DI\Definition\Source\DefinitionFile;
use DI\Definition\Source\DefinitionSource;
use DI\Definition\Source\NoAutowiring;
use DI\Definition\Source\ReflectionBasedAutowiring;
use DI\Definition\Source\SourceCache;
use DI\Definition\Source\SourceChain;
use DI\Proxy\ProxyFactory;
use InvalidArgumentException;
use Psr\Container\ContainerInterface;
/**
* Helper to create and configure a Container.
*
* With the default options, the container created is appropriate for the development environment.
*
* Example:
*
* $builder = new ContainerBuilder();
* $container = $builder->build();
*
* @api
*
* @since 3.2
* @author Matthieu Napoli <[email protected]>
*
* @psalm-template ContainerClass of Container
*/
class ContainerBuilder
{
/**
* Name of the container class, used to create the container.
* @var class-string<Container>
* @psalm-var class-string<ContainerClass>
*/
private string $containerClass;
/**
* Name of the container parent class, used on compiled container.
* @var class-string<Container>
* @psalm-var class-string<ContainerClass>
*/
private string $containerParentClass;
private bool $useAutowiring = true;
private bool $useAttributes = false;
/**
* If set, write the proxies to disk in this directory to improve performances.
*/
private ?string $proxyDirectory = null;
/**
* If PHP-DI is wrapped in another container, this references the wrapper.
*/
private ?ContainerInterface $wrapperContainer = null;
/**
* @var DefinitionSource[]|string[]|array[]
*/
private array $definitionSources = [];
/**
* Whether the container has already been built.
*/
private bool $locked = false;
private ?string $compileToDirectory = null;
private bool $sourceCache = false;
protected string $sourceCacheNamespace = '';
/**
* @param class-string<Container> $containerClass Name of the container class, used to create the container.
* @psalm-param class-string<ContainerClass> $containerClass
*/
public function __construct(string $containerClass = Container::class)
{
$this->containerClass = $containerClass;
}
/**
* Build and return a container.
*
* @return Container
* @psalm-return ContainerClass
*/
public function build()
{
$sources = array_reverse($this->definitionSources);
if ($this->useAttributes) {
$autowiring = new AttributeBasedAutowiring;
$sources[] = $autowiring;
} elseif ($this->useAutowiring) {
$autowiring = new ReflectionBasedAutowiring;
$sources[] = $autowiring;
} else {
$autowiring = new NoAutowiring;
}
$sources = array_map(function ($definitions) use ($autowiring) {
if (is_string($definitions)) {
// File
return new DefinitionFile($definitions, $autowiring);
}
if (is_array($definitions)) {
return new DefinitionArray($definitions, $autowiring);
}
return $definitions;
}, $sources);
$source = new SourceChain($sources);
// Mutable definition source
$source->setMutableDefinitionSource(new DefinitionArray([], $autowiring));
if ($this->sourceCache) {
if (!SourceCache::isSupported()) {
throw new \Exception('APCu is not enabled, PHP-DI cannot use it as a cache');
}
// Wrap the source with the cache decorator
$source = new SourceCache($source, $this->sourceCacheNamespace);
}
$proxyFactory = new ProxyFactory($this->proxyDirectory);
$this->locked = true;
$containerClass = $this->containerClass;
if ($this->compileToDirectory) {
$compiler = new Compiler($proxyFactory);
$compiledContainerFile = $compiler->compile(
$source,
$this->compileToDirectory,
$containerClass,
$this->containerParentClass,
$this->useAutowiring
);
// Only load the file if it hasn't been already loaded
// (the container can be created multiple times in the same process)
if (!class_exists($containerClass, false)) {
require $compiledContainerFile;
}
}
return new $containerClass($source, $proxyFactory, $this->wrapperContainer);
}
/**
* Compile the container for optimum performances.
*
* Be aware that the container is compiled once and never updated!
*
* Therefore:
*
* - in production you should clear that directory every time you deploy
* - in development you should not compile the container
*
* @see https://php-di.org/doc/performances.html
*
* @psalm-template T of CompiledContainer
*
* @param string $directory Directory in which to put the compiled container.
* @param string $containerClass Name of the compiled class. Customize only if necessary.
* @param class-string<Container> $containerParentClass Name of the compiled container parent class. Customize only if necessary.
* @psalm-param class-string<T> $containerParentClass
*
* @psalm-return self<T>
*/
public function enableCompilation(
string $directory,
string $containerClass = 'CompiledContainer',
string $containerParentClass = CompiledContainer::class
) : self {
$this->ensureNotLocked();
$this->compileToDirectory = $directory;
$this->containerClass = $containerClass;
$this->containerParentClass = $containerParentClass;
return $this;
}
/**
* Enable or disable the use of autowiring to guess injections.
*
* Enabled by default.
*
* @return $this
*/
public function useAutowiring(bool $bool) : self
{
$this->ensureNotLocked();
$this->useAutowiring = $bool;
return $this;
}
/**
* Enable or disable the use of PHP 8 attributes to configure injections.
*
* Disabled by default.
*
* @return $this
*/
public function useAttributes(bool $bool) : self
{
$this->ensureNotLocked();
$this->useAttributes = $bool;
return $this;
}
/**
* Configure the proxy generation.
*
* For dev environment, use `writeProxiesToFile(false)` (default configuration)
* For production environment, use `writeProxiesToFile(true, 'tmp/proxies')`
*
* @see https://php-di.org/doc/lazy-injection.html
*
* @param bool $writeToFile If true, write the proxies to disk to improve performances
* @param string|null $proxyDirectory Directory where to write the proxies
* @return $this
* @throws InvalidArgumentException when writeToFile is set to true and the proxy directory is null
*/
public function writeProxiesToFile(bool $writeToFile, string $proxyDirectory = null) : self
{
$this->ensureNotLocked();
if ($writeToFile && $proxyDirectory === null) {
throw new InvalidArgumentException(
'The proxy directory must be specified if you want to write proxies on disk'
);
}
$this->proxyDirectory = $proxyDirectory;
return $this;
}
/**
* If PHP-DI's container is wrapped by another container, we can
* set this so that PHP-DI will use the wrapper rather than itself for building objects.
*
* @return $this
*/
public function wrapContainer(ContainerInterface $otherContainer) : self
{
$this->ensureNotLocked();
$this->wrapperContainer = $otherContainer;
return $this;
}
/**
* Add definitions to the container.
*
* @param string|array|DefinitionSource ...$definitions Can be an array of definitions, the
* name of a file containing definitions
* or a DefinitionSource object.
* @return $this
*/
public function addDefinitions(string|array|DefinitionSource ...$definitions) : self
{
$this->ensureNotLocked();
foreach ($definitions as $definition) {
$this->definitionSources[] = $definition;
}
return $this;
}
/**
* Enables the use of APCu to cache definitions.
*
* You must have APCu enabled to use it.
*
* Before using this feature, you should try these steps first:
* - enable compilation if not already done (see `enableCompilation()`)
* - if you use autowiring or attributes, add all the classes you are using into your configuration so that
* PHP-DI knows about them and compiles them
* Once this is done, you can try to optimize performances further with APCu. It can also be useful if you use
* `Container::make()` instead of `get()` (`make()` calls cannot be compiled so they are not optimized).
*
* Remember to clear APCu on each deploy else your application will have a stale cache. Do not enable the cache
* in development environment: any change you will make to the code will be ignored because of the cache.
*
* @see https://php-di.org/doc/performances.html
*
* @param string $cacheNamespace use unique namespace per container when sharing a single APC memory pool to prevent cache collisions
* @return $this
*/
public function enableDefinitionCache(string $cacheNamespace = '') : self
{
$this->ensureNotLocked();
$this->sourceCache = true;
$this->sourceCacheNamespace = $cacheNamespace;
return $this;
}
/**
* Are we building a compiled container?
*/
public function isCompilationEnabled() : bool
{
return (bool) $this->compileToDirectory;
}
private function ensureNotLocked() : void
{
if ($this->locked) {
throw new \LogicException('The ContainerBuilder cannot be modified after the container has been built');
}
}
}