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PhpStormMetaScanner.php
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PhpStormMetaScanner.php
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<?php
namespace Psalm\Internal\Scanner;
use PhpParser;
use Psalm\Codebase;
use Psalm\Internal\Analyzer\StatementsAnalyzer;
use Psalm\Plugin\EventHandler\Event\FunctionReturnTypeProviderEvent;
use Psalm\Plugin\EventHandler\Event\MethodReturnTypeProviderEvent;
use Psalm\Type;
use Psalm\Type\Atomic\TArray;
use Psalm\Type\Atomic\TKeyedArray;
use Psalm\Type\Atomic\TList;
use Psalm\Type\Atomic\TNamedObject;
use Psalm\Type\Union;
use function count;
use function implode;
use function is_string;
use function str_replace;
use function strpos;
use function strtolower;
/**
* @internal
*/
class PhpStormMetaScanner
{
/**
* @param list<PhpParser\Node\Arg> $args
*/
public static function handleOverride(array $args, Codebase $codebase): void
{
if (count($args) < 2) {
return;
}
$identifier = $args[0]->value;
if (!$args[1]->value instanceof PhpParser\Node\Expr\FuncCall
|| !$args[1]->value->name instanceof PhpParser\Node\Name
) {
return;
}
$map = [];
if ($args[1]->value->name->parts === ['map']
&& $args[1]->value->getArgs()
&& $args[1]->value->getArgs()[0]->value instanceof PhpParser\Node\Expr\Array_
) {
foreach ($args[1]->value->getArgs()[0]->value->items as $array_item) {
if ($array_item
&& $array_item->key instanceof PhpParser\Node\Scalar\String_
) {
if ($array_item->value instanceof PhpParser\Node\Expr\ClassConstFetch
&& $array_item->value->class instanceof PhpParser\Node\Name\FullyQualified
&& $array_item->value->name instanceof PhpParser\Node\Identifier
&& strtolower($array_item->value->name->name)
) {
$map[$array_item->key->value] = new Union([
new TNamedObject(implode('\\', $array_item->value->class->parts))
]);
} elseif ($array_item->value instanceof PhpParser\Node\Scalar\String_) {
$map[$array_item->key->value] = $array_item->value->value;
}
}
}
}
$type_offset = null;
if ($args[1]->value->name->parts === ['type']
&& $args[1]->value->getArgs()
&& $args[1]->value->getArgs()[0]->value instanceof PhpParser\Node\Scalar\LNumber
) {
$type_offset = $args[1]->value->getArgs()[0]->value->value;
}
$element_type_offset = null;
if ($args[1]->value->name->parts === ['elementType']
&& $args[1]->value->getArgs()
&& $args[1]->value->getArgs()[0]->value instanceof PhpParser\Node\Scalar\LNumber
) {
$element_type_offset = $args[1]->value->getArgs()[0]->value->value;
}
if ($identifier instanceof PhpParser\Node\Expr\StaticCall
&& $identifier->class instanceof PhpParser\Node\Name\FullyQualified
&& $identifier->name instanceof PhpParser\Node\Identifier
&& (
$identifier->getArgs() === []
|| $identifier->getArgs()[0]->value instanceof PhpParser\Node\Scalar\LNumber
)
) {
$meta_fq_classlike_name = implode('\\', $identifier->class->parts);
$meta_method_name = strtolower($identifier->name->name);
if ($map) {
$offset = 0;
if ($identifier->getArgs()
&& $identifier->getArgs()[0]->value instanceof PhpParser\Node\Scalar\LNumber
) {
$offset = $identifier->getArgs()[0]->value->value;
}
$codebase->methods->return_type_provider->registerClosure(
$meta_fq_classlike_name,
/**
* @param list<PhpParser\Node\Arg> $call_args
*/
static function (
MethodReturnTypeProviderEvent $event
) use (
$map,
$offset,
$meta_fq_classlike_name,
$meta_method_name
): ?Union {
$statements_analyzer = $event->getSource();
$call_args = $event->getCallArgs();
$method_name = $event->getMethodNameLowercase();
$fq_classlike_name = $event->getFqClasslikeName();
if (!$statements_analyzer instanceof StatementsAnalyzer) {
return Type::getMixed();
}
if ($meta_method_name !== $method_name
|| $meta_fq_classlike_name !== $fq_classlike_name
) {
return null;
}
if (isset($call_args[$offset]->value)
&& ($call_arg_type = $statements_analyzer->node_data->getType($call_args[$offset]->value))
&& $call_arg_type->isSingleStringLiteral()
) {
$offset_arg_value = $call_arg_type->getSingleStringLiteral()->value;
if ($mapped_type = $map[$offset_arg_value] ?? null) {
if ($mapped_type instanceof Union) {
return $mapped_type;
}
}
if (($mapped_type = $map[''] ?? null) && is_string($mapped_type)) {
if (strpos($mapped_type, '@') !== false) {
$mapped_type = str_replace('@', $offset_arg_value, $mapped_type);
if (strpos($mapped_type, '.') === false) {
return new Union([
new TNamedObject($mapped_type)
]);
}
}
}
}
return null;
}
);
} elseif ($type_offset !== null) {
$codebase->methods->return_type_provider->registerClosure(
$meta_fq_classlike_name,
/**
* @param list<PhpParser\Node\Arg> $call_args
*/
static function (
MethodReturnTypeProviderEvent $event
) use (
$type_offset,
$meta_fq_classlike_name,
$meta_method_name
): ?Union {
$statements_analyzer = $event->getSource();
$call_args = $event->getCallArgs();
$method_name = $event->getMethodNameLowercase();
$fq_classlike_name = $event->getFqClasslikeName();
if (!$statements_analyzer instanceof StatementsAnalyzer) {
return Type::getMixed();
}
if ($meta_method_name !== $method_name
|| $meta_fq_classlike_name !== $fq_classlike_name
) {
return null;
}
if (isset($call_args[$type_offset]->value)
&& ($call_arg_type
= $statements_analyzer->node_data->getType($call_args[$type_offset]->value))
) {
return $call_arg_type;
}
return null;
}
);
} elseif ($element_type_offset !== null) {
$codebase->methods->return_type_provider->registerClosure(
$meta_fq_classlike_name,
/**
* @param list<PhpParser\Node\Arg> $call_args
*/
static function (
MethodReturnTypeProviderEvent $event
) use (
$element_type_offset,
$meta_fq_classlike_name,
$meta_method_name
): ?Union {
$statements_analyzer = $event->getSource();
$call_args = $event->getCallArgs();
$method_name = $event->getMethodNameLowercase();
$fq_classlike_name = $event->getFqClasslikeName();
if (!$statements_analyzer instanceof StatementsAnalyzer) {
return Type::getMixed();
}
if ($meta_method_name !== $method_name
|| $meta_fq_classlike_name !== $fq_classlike_name
) {
return null;
}
if (isset($call_args[$element_type_offset]->value)
&& ($call_arg_type
= $statements_analyzer->node_data->getType($call_args[$element_type_offset]->value))
&& $call_arg_type->hasArray()
) {
/**
* @psalm-suppress PossiblyUndefinedStringArrayOffset
* @var TArray|TKeyedArray|TList
*/
$array_atomic_type = $call_arg_type->getAtomicTypes()['array'];
if ($array_atomic_type instanceof TKeyedArray) {
return $array_atomic_type->getGenericValueType();
}
if ($array_atomic_type instanceof TList) {
return $array_atomic_type->type_param;
}
return $array_atomic_type->type_params[1];
}
return null;
}
);
}
}
if ($identifier instanceof PhpParser\Node\Expr\FuncCall
&& $identifier->name instanceof PhpParser\Node\Name\FullyQualified
&& (
$identifier->getArgs() === []
|| $identifier->getArgs()[0]->value instanceof PhpParser\Node\Scalar\LNumber
)
) {
$function_id = strtolower(implode('\\', $identifier->name->parts));
if ($map) {
$offset = 0;
if ($identifier->getArgs()
&& $identifier->getArgs()[0]->value instanceof PhpParser\Node\Scalar\LNumber
) {
$offset = $identifier->getArgs()[0]->value->value;
}
$codebase->functions->return_type_provider->registerClosure(
$function_id,
/**
* @param non-empty-string $function_id
* @param list<PhpParser\Node\Arg> $call_args
*/
static function (
FunctionReturnTypeProviderEvent $event
) use (
$map,
$offset
): Union {
$statements_analyzer = $event->getStatementsSource();
$call_args = $event->getCallArgs();
$function_id = $event->getFunctionId();
if (!$statements_analyzer instanceof StatementsAnalyzer) {
return Type::getMixed();
}
if (isset($call_args[$offset]->value)
&& ($call_arg_type
= $statements_analyzer->node_data->getType($call_args[$offset]->value))
&& $call_arg_type->isSingleStringLiteral()
) {
$offset_arg_value = $call_arg_type->getSingleStringLiteral()->value;
if ($mapped_type = $map[$offset_arg_value] ?? null) {
if ($mapped_type instanceof Union) {
return $mapped_type;
}
}
if (($mapped_type = $map[''] ?? null) && is_string($mapped_type)) {
if (strpos($mapped_type, '@') !== false) {
$mapped_type = str_replace('@', $offset_arg_value, $mapped_type);
if (strpos($mapped_type, '.') === false) {
return new Union([
new TNamedObject($mapped_type)
]);
}
}
}
}
$storage = $statements_analyzer->getCodebase()->functions->getStorage(
$statements_analyzer,
strtolower($function_id)
);
return $storage->return_type ?: Type::getMixed();
}
);
} elseif ($type_offset !== null) {
$codebase->functions->return_type_provider->registerClosure(
$function_id,
/**
* @param non-empty-string $function_id
* @param list<PhpParser\Node\Arg> $call_args
*/
static function (
FunctionReturnTypeProviderEvent $event
) use (
$type_offset
): Union {
$statements_analyzer = $event->getStatementsSource();
$call_args = $event->getCallArgs();
$function_id = $event->getFunctionId();
if (!$statements_analyzer instanceof StatementsAnalyzer) {
return Type::getMixed();
}
if (isset($call_args[$type_offset]->value)
&& ($call_arg_type
= $statements_analyzer->node_data->getType($call_args[$type_offset]->value))
) {
return $call_arg_type;
}
$storage = $statements_analyzer->getCodebase()->functions->getStorage(
$statements_analyzer,
strtolower($function_id)
);
return $storage->return_type ?: Type::getMixed();
}
);
} elseif ($element_type_offset !== null) {
$codebase->functions->return_type_provider->registerClosure(
$function_id,
/**
* @param non-empty-string $function_id
* @param list<PhpParser\Node\Arg> $call_args
*/
static function (
FunctionReturnTypeProviderEvent $event
) use (
$element_type_offset
): Union {
$statements_analyzer = $event->getStatementsSource();
$call_args = $event->getCallArgs();
$function_id = $event->getFunctionId();
if (!$statements_analyzer instanceof StatementsAnalyzer) {
return Type::getMixed();
}
if (isset($call_args[$element_type_offset]->value)
&& ($call_arg_type
= $statements_analyzer->node_data->getType($call_args[$element_type_offset]->value))
&& $call_arg_type->hasArray()
) {
/**
* @psalm-suppress PossiblyUndefinedStringArrayOffset
* @var TArray|TKeyedArray|TList
*/
$array_atomic_type = $call_arg_type->getAtomicTypes()['array'];
if ($array_atomic_type instanceof TKeyedArray) {
return $array_atomic_type->getGenericValueType();
}
if ($array_atomic_type instanceof TList) {
return $array_atomic_type->type_param;
}
return $array_atomic_type->type_params[1];
}
$storage = $statements_analyzer->getCodebase()->functions->getStorage(
$statements_analyzer,
strtolower($function_id)
);
return $storage->return_type ?: Type::getMixed();
}
);
}
}
}
}