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<?php
declare(strict_types=1);
namespace Laminas\Di;
use ArrayAccess;
use function array_filter;
use function array_keys;
use function array_map;
use function class_exists;
use function interface_exists;
use function is_array;
use function is_string;
/**
* Provides a DI configuration from an array.
*
* This configures the instantiation process of the dependency injector.
*
* **Example:**
*
* <code>
* return [
* // This section provides global type preferences.
* // Those are visited if a specific instance has no preference definitions.
* 'preferences' => [
* // The key is the requested class or interface name, the values are
* // the types the dependency injector should prefer.
* Some\Interface::class => Some\Preference::class
* ],
* // This configures the instantiation of specific types.
* // Types may also be purely virtual by defining the aliasOf key.
* 'types' => [
* My\Class::class => [
* 'preferences' => [
* // this supercedes the global type preferences
* // when My\Class is instantiated
* Some\Interface::class => 'My.SpecificAlias'
* ],
*
* // instantiation parameters. These will only be used for
* // the instantiator (i.e. the constructor)
* 'parameters' => [
* 'foo' => My\FooImpl::class, // Use the given type to provide the injection (depends on definition)
* 'bar' => '*' // Use the type preferences
* ],
* ],
*
* 'My.Alias' => [
* // typeOf defines virtual classes which can be used as type
* // preferences or for newInstance calls. They allow providing
* // custom configs for a class
* 'typeOf' => Some\Class::class,
* 'preferences' => [
* Foo::class => Bar::class
* ]
* ]
* ]
* ];
* </code>
*
* ## Notes on Injections
*
* Named arguments and Automatic type lookups will only work for Methods that
* are known to the dependency injector through its definitions. Injections for
* unknown methods do not perform type lookups on its own.
*
* A value injection without any lookups can be forced by providing a
* Resolver\ValueInjection instance.
*
* To force a service/class instance provide a Resolver\TypeInjection instance.
* For classes known from the definitions, a type preference might be the
* better approach
*
* @see \Laminas\Di\Resolver\ValueInjection A container to force injection of a value
* @see \Laminas\Di\Resolver\TypeInjection A container to force looking up a specific type instance for injection
*
* @psalm-type TypeConfigArray = array{
* typeOf?: class-string|null,
* preferences?: array<string, string>|null,
* parameters?: array<string, mixed>|null
* }
*/
class Config implements ConfigInterface
{
/** @var array */
protected $preferences = [];
/** @var array<array> */
protected $types = [];
/**
* Construct from options array
*
* Utilizes the given options array or traversable.
*
* @param array<mixed>|ArrayAccess<mixed, mixed> $options The options array.
* @throws Exception\InvalidArgumentException
*/
public function __construct($options = [])
{
$this->ensureArrayOrArrayAccess($options);
$this->preferences = $this->getDataFromArray($options, 'preferences');
/** @psalm-var array<array> Psalm does not catch the array filter with type predicate */
$this->types = array_filter($this->getDataFromArray($options, 'types'), 'is_array');
}
/**
* @param array|ArrayAccess $data
*/
private function getDataFromArray($data, string $key): array
{
/** @var mixed $result */
$result = $data[$key] ?? [];
return is_array($result) ? $result : [];
}
/**
* {@inheritDoc}
*
* @see \Laminas\Di\ConfigInterface::getClassForAlias()
*/
public function getClassForAlias(string $name): ?string
{
if (
isset($this->types[$name]['typeOf'])
&& is_string($this->types[$name]['typeOf'])
&& (class_exists($this->types[$name]['typeOf']) || interface_exists($this->types[$name]['typeOf']))
) {
return $this->types[$name]['typeOf'];
}
return null;
}
/**
* Returns the instantiation parameters for the given type
*
* @param string $type The alias or class name
* @return array<mixed> The configured parameters
*/
public function getParameters(string $type): array
{
if (! isset($this->types[$type]['parameters']) || ! is_array($this->types[$type]['parameters'])) {
return [];
}
return $this->types[$type]['parameters'];
}
/**
* {@inheritDoc}
*
* @see \Laminas\Di\ConfigInterface::setParameters()
*
* @return $this
* @param array<mixed> $params
*/
public function setParameters(string $type, array $params)
{
$this->types[$type]['parameters'] = $params;
return $this;
}
public function getTypePreference(string $type, ?string $contextClass = null): ?string
{
if ($contextClass) {
return $this->getTypePreferenceForClass($type, $contextClass);
}
if (! isset($this->preferences[$type])) {
return null;
}
/** @var mixed $preference */
$preference = $this->preferences[$type];
return $preference !== '' ? (string) $preference : null;
}
/**
* {@inheritDoc}
*
* @see \Laminas\Di\ConfigInterface::getTypePreferencesForClass()
*/
private function getTypePreferenceForClass(string $type, ?string $context): ?string
{
if (! isset($this->types[$context]['preferences'][$type])) {
return null;
}
/** @var mixed $preference */
$preference = $this->types[$context]['preferences'][$type];
return $preference !== '' ? (string) $preference : null;
}
/**
* {@inheritDoc}
*
* @see ConfigInterface::isAlias()
*/
public function isAlias(string $name): bool
{
return isset($this->types[$name]['typeOf']);
}
/**
* {@inheritDoc}
*
* @see ConfigInterface::getConfiguredTypeNames()
*
* @return list<string>
*/
public function getConfiguredTypeNames(): array
{
return array_map('strval', array_keys($this->types));
}
public function setTypePreference(string $type, string $preference, ?string $context = null): self
{
if ($context) {
/** @psalm-suppress MixedArrayAssignment TODO: Eliminate array structures with the next releases */
$this->types[$context]['preferences'][$type] = $preference;
return $this;
}
$this->preferences[$type] = $preference;
return $this;
}
/**
* @param string $name The name of the alias
* @param string $class The class name this alias points to
* @throws Exception\ClassNotFoundException When `$class` does not exist.
*/
public function setAlias(string $name, string $class): self
{
if (! class_exists($class) && ! interface_exists($class)) {
throw new Exception\ClassNotFoundException($class);
}
$this->types[$name]['typeOf'] = $class;
return $this;
}
/**
* @psalm-assert array|ArrayAccess $options
*/
private function ensureArrayOrArrayAccess(mixed $options): void
{
if (! is_array($options) && ! $options instanceof ArrayAccess) {
throw new Exception\InvalidArgumentException(
'Config data must be of type array or ArrayAccess'
);
}
}
}