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<?php
declare(strict_types=1);
/**
* @author: Alexander Kiryukhin <alexander@kiryukhin.su>
* @license: MIT
*/
namespace NeonXP\Dotenv\Compiler;
use NeonXP\Dotenv\Exception\RuntimeException;
use NeonXP\Dotenv\Types\KeyValue;
/**
* Class Compiler
* @package NeonXP\Dotenv\Compiler
*/
class Compiler implements CompilerInterface
{
const REGEX_VARIABLE = '/\$\{(.+?)\}/';
/**
* @var KeyValue[]
*/
protected $collection = [];
/**
* @var KeyValue[]
*/
protected $cache = [];
/**
* @inheritdoc
* @param KeyValue[] $collection
*/
public function setRawCollection(array $collection): void
{
$this->collection = [];
$this->cache = [];
foreach ($collection as $keyValue) {
$this->collection[$keyValue->getKey()] = $keyValue;
}
}
/**
* @inheritdoc
* @param KeyValue $keyValue
* @return KeyValue
*/
public function compileKeyValue(KeyValue $keyValue): KeyValue
{
$newValue = preg_replace_callback(self::REGEX_VARIABLE, function ($variable) use ($keyValue) {
$variable = $variable[1];
if ($variable === $keyValue->getKey()) {
throw new RuntimeException('Self referencing');
}
if (isset($this->cache[$variable])) {
return $this->cache[$variable]->getValue();
} elseif (isset($this->collection[$variable]) && !$this->needToCompile($this->collection[$variable])) {
return $this->collection[$variable]->getValue();
} elseif (isset($this->collection[$variable]) && $this->needToCompile($this->collection[$variable])) {
return $this->compileKeyValue($this->collection[$variable])->getValue();
}
return "UNKNOWN VARIABLE {$variable}";
}, $keyValue->getValue());
$result = new KeyValue($keyValue->getKey(), $newValue);
$this->cache[$result->getKey()] = $result;
return $result;
}
/**
* @param KeyValue $keyValue
* @return bool
*/
protected function needToCompile(KeyValue $keyValue): bool
{
return !!preg_match(self::REGEX_VARIABLE, $keyValue->getValue());
}
}
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