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

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<?php
namespace Psalm\Internal\Provider;
use PhpParser;
use Psalm\Context;
use Psalm\CodeLocation;
use Psalm\StatementsSource;
use Psalm\Plugin\Hook\FunctionParamsProviderInterface;
use function version_compare;
use const PHP_VERSION;
use function strtolower;
class FunctionParamsProvider
{
/**
* @var array<
* string,
* array<\Closure(
* StatementsSource,
* string,
* array<PhpParser\Node\Arg>,
* ?Context=,
* ?CodeLocation=
* ) : ?array<int, \Psalm\Storage\FunctionLikeParameter>>
* >
*/
private static $handlers = [];
public function __construct()
{
self::$handlers = [];
}
/**
* @param class-string<FunctionParamsProviderInterface> $class
* @psalm-suppress PossiblyUnusedParam
* @return void
*/
public function registerClass(string $class)
{
if (version_compare(PHP_VERSION, '7.1.0') >= 0) {
/**
* @psalm-suppress UndefinedMethod
* @var \Closure
*/
$callable = \Closure::fromCallable([$class, 'getFunctionParams']);
} else {
$callable = (new \ReflectionClass($class))->getMethod('getFunctionParams')->getClosure(new $class);
if (!$callable) {
throw new \UnexpectedValueException('Callable must not be null');
}
}
foreach ($class::getFunctionIds() as $function_id) {
/** @psalm-suppress MixedTypeCoercion */
$this->registerClosure($function_id, $callable);
}
}
/**
* @param \Closure(
* StatementsSource,
* string,
* array<PhpParser\Node\Arg>,
* ?Context=,
* ?CodeLocation=
* ) : ?array<int, \Psalm\Storage\FunctionLikeParameter> $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
* @return ?array<int, \Psalm\Storage\FunctionLikeParameter>
*/
public function getFunctionParams(
StatementsSource $statements_source,
string $function_id,
array $call_args,
Context $context = null,
CodeLocation $code_location = null
) {
foreach (self::$handlers[strtolower($function_id)] as $class_handler) {
$result = $class_handler(
$statements_source,
$function_id,
$call_args,
$context,
$code_location
);
if ($result) {
return $result;
}
}
return null;
}
}