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<?php declare(strict_types=1);
namespace GraphQL\Executor;
use GraphQL\Error\Error;
use GraphQL\Language\AST\ArgumentNode;
use GraphQL\Language\AST\DirectiveNode;
use GraphQL\Language\AST\EnumTypeDefinitionNode;
use GraphQL\Language\AST\EnumTypeExtensionNode;
use GraphQL\Language\AST\EnumValueDefinitionNode;
use GraphQL\Language\AST\FieldDefinitionNode;
use GraphQL\Language\AST\FieldNode;
use GraphQL\Language\AST\FragmentDefinitionNode;
use GraphQL\Language\AST\FragmentSpreadNode;
use GraphQL\Language\AST\InlineFragmentNode;
use GraphQL\Language\AST\InputObjectTypeDefinitionNode;
use GraphQL\Language\AST\InputObjectTypeExtensionNode;
use GraphQL\Language\AST\InputValueDefinitionNode;
use GraphQL\Language\AST\InterfaceTypeDefinitionNode;
use GraphQL\Language\AST\InterfaceTypeExtensionNode;
use GraphQL\Language\AST\Node;
use GraphQL\Language\AST\NodeList;
use GraphQL\Language\AST\NullValueNode;
use GraphQL\Language\AST\ObjectTypeDefinitionNode;
use GraphQL\Language\AST\ObjectTypeExtensionNode;
use GraphQL\Language\AST\OperationDefinitionNode;
use GraphQL\Language\AST\ScalarTypeDefinitionNode;
use GraphQL\Language\AST\ScalarTypeExtensionNode;
use GraphQL\Language\AST\SchemaExtensionNode;
use GraphQL\Language\AST\UnionTypeDefinitionNode;
use GraphQL\Language\AST\UnionTypeExtensionNode;
use GraphQL\Language\AST\VariableDefinitionNode;
use GraphQL\Language\AST\VariableNode;
use GraphQL\Language\Printer;
use GraphQL\Type\Definition\Directive;
use GraphQL\Type\Definition\FieldDefinition;
use GraphQL\Type\Definition\NonNull;
use GraphQL\Type\Definition\Type;
use GraphQL\Type\Schema;
use GraphQL\Utils\AST;
use GraphQL\Utils\Utils;
use GraphQL\Utils\Value;
/**
* @see ArgumentNode - force IDE import
*
* @phpstan-import-type ArgumentNodeValue from ArgumentNode
*
* @see \GraphQL\Tests\Executor\ValuesTest
*/
class Values
{
/**
* Prepares an object map of variables of the correct type based on the provided
* variable definitions and arbitrary input. If the input cannot be coerced
* to match the variable definitions, an Error will be thrown.
*
* @param NodeList<VariableDefinitionNode> $varDefNodes
* @param array<string, mixed> $rawVariableValues
*
* @throws \Exception
*
* @return array{array<int, Error>, null}|array{null, array<string, mixed>}
*/
public static function getVariableValues(Schema $schema, NodeList $varDefNodes, array $rawVariableValues): array
{
$errors = [];
$coercedValues = [];
foreach ($varDefNodes as $varDefNode) {
$varName = $varDefNode->variable->name->value;
$varType = AST::typeFromAST([$schema, 'getType'], $varDefNode->type);
if (! Type::isInputType($varType)) {
// Must use input types for variables. This should be caught during
// validation, however is checked again here for safety.
$typeStr = Printer::doPrint($varDefNode->type);
$errors[] = new Error(
"Variable \"\${$varName}\" expected value of type \"{$typeStr}\" which cannot be used as an input type.",
[$varDefNode->type]
);
} else {
$hasValue = \array_key_exists($varName, $rawVariableValues);
$value = $hasValue
? $rawVariableValues[$varName]
: Utils::undefined();
if (! $hasValue && ($varDefNode->defaultValue !== null)) {
// If no value was provided to a variable with a default value,
// use the default value.
$coercedValues[$varName] = AST::valueFromAST($varDefNode->defaultValue, $varType);
} elseif ((! $hasValue || $value === null) && ($varType instanceof NonNull)) {
// If no value or a nullish value was provided to a variable with a
// non-null type (required), produce an error.
$safeVarType = Utils::printSafe($varType);
$message = $hasValue
? "Variable \"\${$varName}\" of non-null type \"{$safeVarType}\" must not be null."
: "Variable \"\${$varName}\" of required type \"{$safeVarType}\" was not provided.";
$errors[] = new Error($message, [$varDefNode]);
} elseif ($hasValue) {
if ($value === null) {
// If the explicit value `null` was provided, an entry in the coerced
// values must exist as the value `null`.
$coercedValues[$varName] = null;
} else {
// Otherwise, a non-null value was provided, coerce it to the expected
// type or report an error if coercion fails.
$coerced = Value::coerceInputValue($value, $varType);
$coercionErrors = $coerced['errors'];
if ($coercionErrors !== null) {
foreach ($coercionErrors as $coercionError) {
$invalidValue = $coercionError->printInvalidValue();
$inputPath = $coercionError->printInputPath();
$pathMessage = $inputPath !== null
? " at \"{$varName}{$inputPath}\""
: '';
$errors[] = new Error(
"Variable \"\${$varName}\" got invalid value {$invalidValue}{$pathMessage}; {$coercionError->getMessage()}",
$varDefNode,
$coercionError->getSource(),
$coercionError->getPositions(),
$coercionError->getPath(),
$coercionError,
$coercionError->getExtensions()
);
}
} else {
$coercedValues[$varName] = $coerced['value'];
}
}
}
}
}
return $errors === []
? [null, $coercedValues]
: [$errors, null];
}
/**
* Prepares an object map of argument values given a directive definition
* and an AST node which may contain directives. Optionally also accepts a map
* of variable values.
*
* If the directive does not exist on the node, returns undefined.
*
* @param EnumTypeDefinitionNode|EnumTypeExtensionNode|EnumValueDefinitionNode|FieldDefinitionNode|FieldNode|FragmentDefinitionNode|FragmentSpreadNode|InlineFragmentNode|InputObjectTypeDefinitionNode|InputObjectTypeExtensionNode|InputValueDefinitionNode|InterfaceTypeDefinitionNode|InterfaceTypeExtensionNode|ObjectTypeDefinitionNode|ObjectTypeExtensionNode|OperationDefinitionNode|ScalarTypeDefinitionNode|ScalarTypeExtensionNode|SchemaExtensionNode|UnionTypeDefinitionNode|UnionTypeExtensionNode|VariableDefinitionNode $node
* @param array<string, mixed>|null $variableValues
*
* @throws \Exception
* @throws Error
*
* @return array<string, mixed>|null
*/
public static function getDirectiveValues(Directive $directiveDef, Node $node, array $variableValues = null): ?array
{
$directiveDefName = $directiveDef->name;
foreach ($node->directives as $directive) {
if ($directive->name->value === $directiveDefName) {
return self::getArgumentValues($directiveDef, $directive, $variableValues);
}
}
return null;
}
/**
* Prepares an object map of argument values given a list of argument
* definitions and list of argument AST nodes.
*
* @param FieldDefinition|Directive $def
* @param FieldNode|DirectiveNode $node
* @param array<string, mixed>|null $variableValues
*
* @throws \Exception
* @throws Error
*
* @return array<string, mixed>
*/
public static function getArgumentValues($def, Node $node, array $variableValues = null): array
{
if ($def->args === []) {
return [];
}
/** @var array<string, ArgumentNodeValue> $argumentValueMap */
$argumentValueMap = [];
// Might not be defined when an AST from JS is used
if (isset($node->arguments)) {
foreach ($node->arguments as $argumentNode) {
$argumentValueMap[$argumentNode->name->value] = $argumentNode->value;
}
}
return static::getArgumentValuesForMap($def, $argumentValueMap, $variableValues, $node);
}
/**
* @param FieldDefinition|Directive $def
* @param array<string, ArgumentNodeValue> $argumentValueMap
* @param array<string, mixed>|null $variableValues
*
* @throws \Exception
* @throws Error
*
* @return array<string, mixed>
*/
public static function getArgumentValuesForMap($def, array $argumentValueMap, array $variableValues = null, Node $referenceNode = null): array
{
/** @var array<string, mixed> $coercedValues */
$coercedValues = [];
foreach ($def->args as $argumentDefinition) {
$name = $argumentDefinition->name;
$argType = $argumentDefinition->getType();
$argumentValueNode = $argumentValueMap[$name] ?? null;
if ($argumentValueNode instanceof VariableNode) {
$variableName = $argumentValueNode->name->value;
$hasValue = $variableValues !== null && \array_key_exists($variableName, $variableValues);
$isNull = $hasValue && $variableValues[$variableName] === null;
} else {
$hasValue = $argumentValueNode !== null;
$isNull = $argumentValueNode instanceof NullValueNode;
}
if (! $hasValue && $argumentDefinition->defaultValueExists()) {
// If no argument was provided where the definition has a default value,
// use the default value.
$coercedValues[$name] = $argumentDefinition->defaultValue;
} elseif ((! $hasValue || $isNull) && ($argType instanceof NonNull)) {
// If no argument or a null value was provided to an argument with a
// non-null type (required), produce a field error.
$safeArgType = Utils::printSafe($argType);
if ($isNull) {
throw new Error(
"Argument \"{$name}\" of non-null type \"{$safeArgType}\" must not be null.",
$referenceNode
);
}
if ($argumentValueNode instanceof VariableNode) {
throw new Error(
"Argument \"{$name}\" of required type \"{$safeArgType}\" was provided the variable \"\${$argumentValueNode->name->value}\" which was not provided a runtime value.",
[$argumentValueNode]
);
}
throw new Error(
"Argument \"{$name}\" of required type \"{$safeArgType}\" was not provided.",
$referenceNode
);
} elseif ($hasValue) {
assert($argumentValueNode instanceof Node);
if ($argumentValueNode instanceof NullValueNode) {
// If the explicit value `null` was provided, an entry in the coerced
// values must exist as the value `null`.
$coercedValues[$name] = null;
} elseif ($argumentValueNode instanceof VariableNode) {
$variableName = $argumentValueNode->name->value;
// Note: This does no further checking that this variable is correct.
// This assumes that this query has been validated and the variable
// usage here is of the correct type.
$coercedValues[$name] = $variableValues[$variableName] ?? null;
} else {
$coercedValue = AST::valueFromAST($argumentValueNode, $argType, $variableValues);
if (Utils::undefined() === $coercedValue) {
// Note: ValuesOfCorrectType validation should catch this before
// execution. This is a runtime check to ensure execution does not
// continue with an invalid argument value.
$invalidValue = Printer::doPrint($argumentValueNode);
throw new Error(
"Argument \"{$name}\" has invalid value {$invalidValue}.",
[$argumentValueNode]
);
}
$coercedValues[$name] = $coercedValue;
}
}
}
return $coercedValues;
}
}