<?php
declare (strict_types=1);
namespace ElementorDeps\DI\Definition\Source;
use ElementorDeps\DI\Definition\Definition;
use ElementorDeps\DI\Definition\ExtendsPreviousDefinition;
/**
* Manages a chain of other definition sources.
*
* @author Matthieu Napoli <matthieu@mnapoli.fr>
*/
class SourceChain implements DefinitionSource, MutableDefinitionSource
{
/**
* @var DefinitionSource[]
*/
private $sources;
/**
* @var DefinitionSource
*/
private $rootSource;
/**
* @var MutableDefinitionSource|null
*/
private $mutableSource;
/**
* @param DefinitionSource[] $sources
*/
public function __construct(array $sources)
{
// We want a numerically indexed array to ease the traversal later
$this->sources = \array_values($sources);
$this->rootSource = $this;
}
/**
* {@inheritdoc}
*
* @param int $startIndex Use this parameter to start looking from a specific
* point in the source chain.
*/
public function getDefinition(string $name, int $startIndex = 0)
{
$count = \count($this->sources);
for ($i = $startIndex; $i < $count; ++$i) {
$source = $this->sources[$i];
$definition = $source->getDefinition($name);
if ($definition) {
if ($definition instanceof ExtendsPreviousDefinition) {
$this->resolveExtendedDefinition($definition, $i);
}
return $definition;
}
}
return null;
}
public function getDefinitions() : array
{
$names = [];
foreach ($this->sources as $source) {
$names = \array_merge($names, $source->getDefinitions());
}
$names = \array_keys($names);
$definitions = \array_combine($names, \array_map(function (string $name) {
return $this->getDefinition($name);
}, $names));
return $definitions;
}
public function addDefinition(Definition $definition)
{
if (!$this->mutableSource) {
throw new \LogicException("The container's definition source has not been initialized correctly");
}
$this->mutableSource->addDefinition($definition);
}
private function resolveExtendedDefinition(ExtendsPreviousDefinition $definition, int $currentIndex)
{
// Look in the next sources only (else infinite recursion, and we can only extend
// entries defined in the previous definition files - a previous == next here because
// the array was reversed ;) )
$subDefinition = $this->getDefinition($definition->getName(), $currentIndex + 1);
if ($subDefinition) {
$definition->setExtendedDefinition($subDefinition);
}
}
public function setMutableDefinitionSource(MutableDefinitionSource $mutableSource)
{
$this->mutableSource = $mutableSource;
\array_unshift($this->sources, $mutableSource);
}
}