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<?php
declare(strict_types=1);
namespace Roave\BetterReflection\Util;
use InvalidArgumentException;
use Roave\BetterReflection\Identifier\IdentifierType;
use Roave\BetterReflection\Reflection\Reflection;
use Roave\BetterReflection\Reflection\ReflectionClass;
use Roave\BetterReflection\Reflection\ReflectionConstant;
use Roave\BetterReflection\Reflection\ReflectionFunction;
use Roave\BetterReflection\Reflection\ReflectionMethod;
use Roave\BetterReflection\Reflector\ClassReflector;
use Roave\BetterReflection\SourceLocator\Ast\Exception\ParseToAstFailure;
use Roave\BetterReflection\SourceLocator\Ast\Locator;
use Roave\BetterReflection\SourceLocator\Exception\InvalidFileLocation;
use Roave\BetterReflection\SourceLocator\Type\AggregateSourceLocator;
use Roave\BetterReflection\SourceLocator\Type\SingleFileSourceLocator;
use Roave\BetterReflection\SourceLocator\Type\SourceLocator;
use function array_merge;
use function method_exists;
final class FindReflectionOnLine
{
/** @var SourceLocator */
private $sourceLocator;
/** @var Locator */
private $astLocator;
public function __construct(SourceLocator $sourceLocator, Locator $astLocator)
{
$this->sourceLocator = $sourceLocator;
$this->astLocator = $astLocator;
}
/**
* Find a reflection on the specified line number.
*
* Returns null if no reflections found on the line.
*
* @return ReflectionMethod|ReflectionClass|ReflectionFunction|ReflectionConstant|Reflection|null
*
* @throws InvalidFileLocation
* @throws ParseToAstFailure
* @throws InvalidArgumentException
*/
public function __invoke(string $filename, int $lineNumber)
{
$reflections = $this->computeReflections($filename);
foreach ($reflections as $reflection) {
if ($reflection instanceof ReflectionClass && $this->containsLine($reflection, $lineNumber)) {
foreach ($reflection->getMethods() as $method) {
if ($this->containsLine($method, $lineNumber)) {
return $method;
}
}
return $reflection;
}
if ($reflection instanceof ReflectionFunction && $this->containsLine($reflection, $lineNumber)) {
return $reflection;
}
if ($reflection instanceof ReflectionConstant && $this->containsLine($reflection, $lineNumber)) {
return $reflection;
}
}
return null;
}
/**
* Find all class and function reflections in the specified file
*
* @return Reflection[]
*
* @throws ParseToAstFailure
* @throws InvalidFileLocation
*/
private function computeReflections(string $filename) : array
{
$singleFileSourceLocator = new SingleFileSourceLocator($filename, $this->astLocator);
$reflector = new ClassReflector(new AggregateSourceLocator([$singleFileSourceLocator, $this->sourceLocator]));
return array_merge(
$singleFileSourceLocator->locateIdentifiersByType($reflector, new IdentifierType(IdentifierType::IDENTIFIER_CLASS)),
$singleFileSourceLocator->locateIdentifiersByType($reflector, new IdentifierType(IdentifierType::IDENTIFIER_FUNCTION)),
$singleFileSourceLocator->locateIdentifiersByType($reflector, new IdentifierType(IdentifierType::IDENTIFIER_CONSTANT))
);
}
/**
* Check to see if the line is within the boundaries of the reflection specified.
*
* @param ReflectionMethod|ReflectionClass|ReflectionFunction|Reflection $reflection
*
* @throws InvalidArgumentException
*/
private function containsLine($reflection, int $lineNumber) : bool
{
if (! method_exists($reflection, 'getStartLine')) {
throw new InvalidArgumentException('Reflection does not have getStartLine method');
}
if (! method_exists($reflection, 'getEndLine')) {
throw new InvalidArgumentException('Reflection does not have getEndLine method');
}
return $lineNumber >= $reflection->getStartLine() && $lineNumber <= $reflection->getEndLine();
}
}
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