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psalm/src/Psalm/Internal/Provider/MethodExistenceProvider.php

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<?php
namespace Psalm\Internal\Provider;
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use const PHP_VERSION;
use PhpParser;
use Psalm\CodeLocation;
use Psalm\Plugin\Hook\MethodExistenceProviderInterface;
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use Psalm\StatementsSource;
use function strtolower;
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use function version_compare;
class MethodExistenceProvider
{
/**
* @var array<
* string,
* array<\Closure(
* string,
* string,
* ?StatementsSource=,
* ?CodeLocation
* ) : ?bool>
* >
*/
private static $handlers = [];
public function __construct()
{
self::$handlers = [];
}
/**
* @param class-string<MethodExistenceProviderInterface> $class
* @psalm-suppress PossiblyUnusedParam
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*
* @return void
*/
public function registerClass(string $class)
{
if (version_compare(PHP_VERSION, '7.1.0') >= 0) {
/**
* @psalm-suppress UndefinedMethod
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*
* @var \Closure
*/
$callable = \Closure::fromCallable([$class, 'doesMethodExist']);
} else {
$callable = (new \ReflectionClass($class))->getMethod('doesMethodExist')->getClosure(new $class);
if (!$callable) {
throw new \UnexpectedValueException('Callable must not be null');
}
}
foreach ($class::getClassLikeNames() as $fq_classlike_name) {
/** @psalm-suppress MixedTypeCoercion */
$this->registerClosure($fq_classlike_name, $callable);
}
}
/**
* /**
* @param \Closure(
* string,
* string,
* ?StatementsSource=,
* ?CodeLocation
* ) : ?bool $c
*
* @return void
*/
public function registerClosure(string $fq_classlike_name, \Closure $c)
{
self::$handlers[strtolower($fq_classlike_name)][] = $c;
}
public function has(string $fq_classlike_name) : bool
{
return isset(self::$handlers[strtolower($fq_classlike_name)]);
}
/**
* @param array<PhpParser\Node\Arg> $call_args
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*
* @return ?bool
*/
public function doesMethodExist(
string $fq_classlike_name,
string $method_name_lowercase,
StatementsSource $source = null,
CodeLocation $code_location = null
) {
foreach (self::$handlers[strtolower($fq_classlike_name)] as $method_handler) {
$method_exists = $method_handler(
$fq_classlike_name,
$method_name_lowercase,
$source,
$code_location
);
if ($method_exists !== null) {
return $method_exists;
}
}
return null;
}
}