public function __invoke(ValidationContext $context)
{
return [Node::FIELD => function (Field $fieldAST) use($context) {
$fieldDef = $context->getFieldDef();
if (!$fieldDef) {
return Visitor::skipNode();
}
$errors = [];
$argASTs = $fieldAST->arguments ?: [];
$argASTMap = Utils::keyMap($argASTs, function (Argument $arg) {
return $arg->name->value;
});
foreach ($fieldDef->args as $argDef) {
$argAST = isset($argASTMap[$argDef->name]) ? $argASTMap[$argDef->name] : null;
if (!$argAST && $argDef->getType() instanceof NonNull) {
$errors[] = new Error(Messages::missingArgMessage($fieldAST->name->value, $argDef->name, $argDef->getType()), [$fieldAST]);
}
}
$argDefMap = Utils::keyMap($fieldDef->args, function ($def) {
return $def->name;
});
foreach ($argASTs as $argAST) {
$argDef = $argDefMap[$argAST->name->value];
if ($argDef && !DocumentValidator::isValidLiteralValue($argAST->value, $argDef->getType())) {
$errors[] = new Error(Messages::badValueMessage($argAST->name->value, $argDef->getType(), Printer::doPrint($argAST->value)), [$argAST->value]);
}
}
return !empty($errors) ? $errors : null;
}];
}
private function doTypesOverlap($t1, $t2)
{
if ($t1 === $t2) {
return true;
}
if ($t1 instanceof ObjectType) {
if ($t2 instanceof ObjectType) {
return false;
}
return in_array($t1, $t2->getPossibleTypes());
}
if ($t1 instanceof InterfaceType || $t1 instanceof UnionType) {
if ($t2 instanceof ObjectType) {
return in_array($t2, $t1->getPossibleTypes());
}
$t1TypeNames = Utils::keyMap($t1->getPossibleTypes(), function ($type) {
return $type->name;
});
foreach ($t2->getPossibleTypes() as $type) {
if (!empty($t1TypeNames[$type->name])) {
return true;
}
}
}
return false;
}
/**
* Prepares an object map of argument values given a list of argument
* definitions and list of argument AST nodes.
*
* @param FieldArgument[] $argDefs
* @param Argument[] $argASTs
* @param $variableValues
* @return array
*/
public static function getArgumentValues($argDefs, $argASTs, $variableValues)
{
if (!$argDefs) {
return [];
}
$argASTMap = $argASTs ? Utils::keyMap($argASTs, function ($arg) {
return $arg->name->value;
}) : [];
$result = [];
foreach ($argDefs as $argDef) {
$name = $argDef->name;
$valueAST = isset($argASTMap[$name]) ? $argASTMap[$name]->value : null;
$value = Utils\AST::valueFromAST($valueAST, $argDef->getType(), $variableValues);
if (null === $value) {
$value = $argDef->defaultValue;
}
if (null !== $value) {
$result[$name] = $value;
}
}
return $result;
}
/**
* Utility for validators which determines if a value literal AST is valid given
* an input type.
*
* Note that this only validates literal values, variables are assumed to
* provide values of the correct type.
*
* @return array
*/
public static function isValidLiteralValue(Type $type, $valueNode)
{
// A value must be provided if the type is non-null.
if ($type instanceof NonNull) {
if (!$valueNode || $valueNode instanceof NullValueNode) {
return ['Expected "' . Utils::printSafe($type) . '", found null.'];
}
return static::isValidLiteralValue($type->getWrappedType(), $valueNode);
}
if (!$valueNode || $valueNode instanceof NullValueNode) {
return [];
}
// This function only tests literals, and assumes variables will provide
// values of the correct type.
if ($valueNode instanceof VariableNode) {
return [];
}
// Lists accept a non-list value as a list of one.
if ($type instanceof ListOfType) {
$itemType = $type->getWrappedType();
if ($valueNode instanceof ListValueNode) {
$errors = [];
foreach ($valueNode->values as $index => $itemNode) {
$tmp = static::isValidLiteralValue($itemType, $itemNode);
if ($tmp) {
$errors = array_merge($errors, Utils::map($tmp, function ($error) use($index) {
return "In element #{$index}: {$error}";
}));
}
}
return $errors;
} else {
return static::isValidLiteralValue($itemType, $valueNode);
}
}
// Input objects check each defined field and look for undefined fields.
if ($type instanceof InputObjectType) {
if ($valueNode->kind !== NodeKind::OBJECT) {
return ["Expected \"{$type->name}\", found not an object."];
}
$fields = $type->getFields();
$errors = [];
// Ensure every provided field is defined.
$fieldNodes = $valueNode->fields;
foreach ($fieldNodes as $providedFieldNode) {
if (empty($fields[$providedFieldNode->name->value])) {
$errors[] = "In field \"{$providedFieldNode->name->value}\": Unknown field.";
}
}
// Ensure every defined field is valid.
$fieldNodeMap = Utils::keyMap($fieldNodes, function ($fieldNode) {
return $fieldNode->name->value;
});
foreach ($fields as $fieldName => $field) {
$result = static::isValidLiteralValue($field->getType(), isset($fieldNodeMap[$fieldName]) ? $fieldNodeMap[$fieldName]->value : null);
if ($result) {
$errors = array_merge($errors, Utils::map($result, function ($error) use($fieldName) {
return "In field \"{$fieldName}\": {$error}";
}));
}
}
return $errors;
}
if ($type instanceof LeafType) {
// Scalar/Enum input checks to ensure the type can parse the value to
// a non-null value.
$parseResult = $type->parseLiteral($valueNode);
if (null === $parseResult) {
$printed = Printer::doPrint($valueNode);
return ["Expected type \"{$type->name}\", found {$printed}."];
}
return [];
}
throw new InvariantViolation('Must be input type');
}
/**
* Produces a PHP value given a GraphQL Value AST.
*
* A GraphQL type must be provided, which will be used to interpret different
* GraphQL Value literals.
*
* | GraphQL Value | PHP Value |
* | -------------------- | ------------- |
* | Input Object | Assoc Array |
* | List | Array |
* | Boolean | Boolean |
* | String | String |
* | Int / Float | Int / Float |
* | Enum Value | Mixed |
*
* @param $valueAST
* @param InputType $type
* @param null $variables
* @return array|null
* @throws \Exception
*/
public static function valueFromAST($valueAST, InputType $type, $variables = null)
{
if ($type instanceof NonNull) {
// Note: we're not checking that the result of valueFromAST is non-null.
// We're assuming that this query has been validated and the value used
// here is of the correct type.
return self::valueFromAST($valueAST, $type->getWrappedType(), $variables);
}
if (!$valueAST) {
return null;
}
if ($valueAST instanceof Variable) {
$variableName = $valueAST->name->value;
if (!$variables || !isset($variables[$variableName])) {
return null;
}
// Note: we're not doing any checking that this variable is correct. We're
// assuming that this query has been validated and the variable usage here
// is of the correct type.
return $variables[$variableName];
}
if ($type instanceof ListOfType) {
$itemType = $type->getWrappedType();
if ($valueAST instanceof ListValue) {
return array_map(function ($itemAST) use($itemType, $variables) {
return self::valueFromAST($itemAST, $itemType, $variables);
}, $valueAST->values);
} else {
return [self::valueFromAST($valueAST, $itemType, $variables)];
}
}
if ($type instanceof InputObjectType) {
$fields = $type->getFields();
if (!$valueAST instanceof ObjectValue) {
return null;
}
$fieldASTs = Utils::keyMap($valueAST->fields, function ($field) {
return $field->name->value;
});
$values = [];
foreach ($fields as $field) {
$fieldAST = isset($fieldASTs[$field->name]) ? $fieldASTs[$field->name] : null;
$fieldValue = self::valueFromAST($fieldAST ? $fieldAST->value : null, $field->getType(), $variables);
if (null === $fieldValue) {
$fieldValue = $field->defaultValue;
}
if (null !== $fieldValue) {
$values[$field->name] = $fieldValue;
}
}
return $values;
}
if ($type instanceof LeafType) {
return $type->parseLiteral($valueAST);
}
throw new InvariantViolation('Must be input type');
}
public static function valueFromAST($valueAST, InputType $type, $variables = null)
{
if ($type instanceof NonNull) {
return self::valueFromAST($valueAST, $type->getWrappedType(), $variables);
}
if (!$valueAST) {
return null;
}
if ($valueAST instanceof Variable) {
$variableName = $valueAST->name->value;
if (!$variables || !isset($variables[$variableName])) {
return null;
}
return $variables[$variableName];
}
if ($type instanceof ListOfType) {
$itemType = $type->getWrappedType();
if ($valueAST instanceof ListValue) {
return array_map(function ($itemAST) use($itemType, $variables) {
return Values::valueFromAST($itemAST, $itemType, $variables);
}, $valueAST->values);
} else {
return [self::valueFromAST($valueAST, $itemType, $variables)];
}
}
if ($type instanceof InputObjectType) {
$fields = $type->getFields();
if (!$valueAST instanceof ObjectValue) {
return null;
}
$fieldASTs = Utils::keyMap($valueAST->fields, function ($field) {
return $field->name->value;
});
$values = [];
foreach ($fields as $field) {
$fieldAST = isset($fieldASTs[$field->name]) ? $fieldASTs[$field->name] : null;
$fieldValue = self::valueFromAST($fieldAST ? $fieldAST->value : null, $field->getType(), $variables);
if (null === $fieldValue) {
$fieldValue = $field->defaultValue;
}
if (null !== $fieldValue) {
$values[$field->name] = $fieldValue;
}
}
return $values;
}
Utils::invariant($type instanceof ScalarType || $type instanceof EnumType, 'Must be input type');
return $type->parseLiteral($valueAST);
}
/**
* Produces a PHP value given a GraphQL Value AST.
*
* A GraphQL type must be provided, which will be used to interpret different
* GraphQL Value literals.
*
* Returns `null` when the value could not be validly coerced according to
* the provided type.
*
* | GraphQL Value | PHP Value |
* | -------------------- | ------------- |
* | Input Object | Assoc Array |
* | List | Array |
* | Boolean | Boolean |
* | String | String |
* | Int / Float | Int / Float |
* | Enum Value | Mixed |
* | Null Value | stdClass | instance of NullValue::getNullValue()
*
* @param $valueNode
* @param InputType $type
* @param null $variables
* @return array|null|\stdClass
* @throws \Exception
*/
public static function valueFromAST($valueNode, InputType $type, $variables = null)
{
$undefined = Utils::undefined();
if (!$valueNode) {
// When there is no AST, then there is also no value.
// Importantly, this is different from returning the GraphQL null value.
return $undefined;
}
if ($type instanceof NonNull) {
if ($valueNode instanceof NullValueNode) {
// Invalid: intentionally return no value.
return $undefined;
}
return self::valueFromAST($valueNode, $type->getWrappedType(), $variables);
}
if ($valueNode instanceof NullValueNode) {
// This is explicitly returning the value null.
return null;
}
if ($valueNode instanceof VariableNode) {
$variableName = $valueNode->name->value;
if (!$variables || !array_key_exists($variableName, $variables)) {
// No valid return value.
return $undefined;
}
// Note: we're not doing any checking that this variable is correct. We're
// assuming that this query has been validated and the variable usage here
// is of the correct type.
return $variables[$variableName];
}
if ($type instanceof ListOfType) {
$itemType = $type->getWrappedType();
if ($valueNode instanceof ListValueNode) {
$coercedValues = [];
$itemNodes = $valueNode->values;
foreach ($itemNodes as $itemNode) {
if (self::isMissingVariable($itemNode, $variables)) {
// If an array contains a missing variable, it is either coerced to
// null or if the item type is non-null, it considered invalid.
if ($itemType instanceof NonNull) {
// Invalid: intentionally return no value.
return $undefined;
}
$coercedValues[] = null;
} else {
$itemValue = self::valueFromAST($itemNode, $itemType, $variables);
if ($undefined === $itemValue) {
// Invalid: intentionally return no value.
return $undefined;
}
$coercedValues[] = $itemValue;
}
}
return $coercedValues;
}
$coercedValue = self::valueFromAST($valueNode, $itemType, $variables);
if ($undefined === $coercedValue) {
// Invalid: intentionally return no value.
return $undefined;
}
return [$coercedValue];
}
if ($type instanceof InputObjectType) {
if (!$valueNode instanceof ObjectValueNode) {
// Invalid: intentionally return no value.
return $undefined;
}
$coercedObj = [];
$fields = $type->getFields();
$fieldNodes = Utils::keyMap($valueNode->fields, function ($field) {
return $field->name->value;
});
foreach ($fields as $field) {
/** @var ValueNode $fieldNode */
$fieldName = $field->name;
$fieldNode = isset($fieldNodes[$fieldName]) ? $fieldNodes[$fieldName] : null;
if (!$fieldNode || self::isMissingVariable($fieldNode->value, $variables)) {
if ($field->defaultValueExists()) {
$coercedObj[$fieldName] = $field->defaultValue;
} else {
if ($field->getType() instanceof NonNull) {
// Invalid: intentionally return no value.
return $undefined;
}
}
continue;
}
$fieldValue = self::valueFromAST($fieldNode ? $fieldNode->value : null, $field->getType(), $variables);
if ($undefined === $fieldValue) {
// Invalid: intentionally return no value.
return $undefined;
}
$coercedObj[$fieldName] = $fieldValue;
}
return $coercedObj;
}
if ($type instanceof LeafType) {
$parsed = $type->parseLiteral($valueNode);
if (null === $parsed) {
// null represent a failure to parse correctly,
// in which case no value is returned.
return $undefined;
}
return $parsed;
}
throw new InvariantViolation('Must be input type');
}
static function isValidLiteralValue($valueAST, Type $type)
{
// A value can only be not provided if the type is nullable.
if (!$valueAST) {
return !$type instanceof NonNull;
}
// Unwrap non-null.
if ($type instanceof NonNull) {
return self::isValidLiteralValue($valueAST, $type->getWrappedType());
}
// This function only tests literals, and assumes variables will provide
// values of the correct type.
if ($valueAST instanceof Variable) {
return true;
}
if (!$valueAST instanceof Value) {
return false;
}
// Lists accept a non-list value as a list of one.
if ($type instanceof ListOfType) {
$itemType = $type->getWrappedType();
if ($valueAST instanceof ListValue) {
foreach ($valueAST->values as $itemAST) {
if (!self::isValidLiteralValue($itemAST, $itemType)) {
return false;
}
}
return true;
} else {
return self::isValidLiteralValue($valueAST, $itemType);
}
}
// Scalar/Enum input checks to ensure the type can serialize the value to
// a non-null value.
if ($type instanceof ScalarType || $type instanceof EnumType) {
return $type->parseLiteral($valueAST) !== null;
}
// Input objects check each defined field, ensuring it is of the correct
// type and provided if non-nullable.
if ($type instanceof InputObjectType) {
$fields = $type->getFields();
if ($valueAST->kind !== Node::OBJECT) {
return false;
}
$fieldASTs = $valueAST->fields;
$fieldASTMap = Utils::keyMap($fieldASTs, function ($field) {
return $field->name->value;
});
foreach ($fields as $fieldKey => $field) {
$fieldName = $field->name ?: $fieldKey;
if (!isset($fieldASTMap[$fieldName]) && $field->getType() instanceof NonNull) {
// Required fields missing
return false;
}
}
foreach ($fieldASTs as $fieldAST) {
if (empty($fields[$fieldAST->name->value]) || !self::isValidLiteralValue($fieldAST->value, $fields[$fieldAST->name->value]->getType())) {
return false;
}
}
return true;
}
// Any other kind of type is not an input type, and a literal cannot be used.
return false;
}
/**
* Given a type and a value AST node known to match this type, build a
* runtime value.
*/
private static function coerceValueAST(Type $type, $valueAST, $variables)
{
if ($type instanceof NonNull) {
// Note: we're not checking that the result of coerceValueAST is non-null.
// We're assuming that this query has been validated and the value used
// here is of the correct type.
return self::coerceValueAST($type->getWrappedType(), $valueAST, $variables);
}
if (!$valueAST) {
return null;
}
if ($valueAST->kind === Node::VARIABLE) {
$variableName = $valueAST->name->value;
if (!isset($variables, $variables[$variableName])) {
return null;
}
// Note: we're not doing any checking that this variable is correct. We're
// assuming that this query has been validated and the variable usage here
// is of the correct type.
return $variables[$variableName];
}
if ($type instanceof ListOfType) {
$itemType = $type->getWrappedType();
if ($valueAST->kind === Node::ARR) {
$tmp = [];
foreach ($valueAST->values as $itemAST) {
$tmp[] = self::coerceValueAST($itemType, $itemAST, $variables);
}
return $tmp;
} else {
return [self::coerceValueAST($itemType, $valueAST, $variables)];
}
}
if ($type instanceof InputObjectType) {
$fields = $type->getFields();
if ($valueAST->kind !== Node::OBJECT) {
return null;
}
$fieldASTs = Utils::keyMap($valueAST->fields, function ($field) {
return $field->name->value;
});
$obj = [];
foreach ($fields as $fieldName => $field) {
$fieldAST = $fieldASTs[$fieldName];
$fieldValue = self::coerceValueAST($field->getType(), $fieldAST ? $fieldAST->value : null, $variables);
$obj[$fieldName] = $fieldValue === null ? $field->defaultValue : $fieldValue;
}
return $obj;
}
if ($type instanceof ScalarType || $type instanceof EnumType) {
$coerced = $type->coerceLiteral($valueAST);
if (null !== $coerced) {
return $coerced;
}
}
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|\GraphQL\Language\AST\DirectiveNode $node
* @param $variableValues
* @return array
* @throws Error
*/
public static function getArgumentValues($def, $node, $variableValues)
{
$argDefs = $def->args;
$argNodes = $node->arguments;
if (!$argDefs || null === $argNodes) {
return [];
}
$coercedValues = [];
$undefined = Utils::undefined();
/** @var ArgumentNode[] $argNodeMap */
$argNodeMap = $argNodes ? Utils::keyMap($argNodes, function (ArgumentNode $arg) {
return $arg->name->value;
}) : [];
foreach ($argDefs as $argDef) {
$name = $argDef->name;
$argType = $argDef->getType();
$argumentNode = isset($argNodeMap[$name]) ? $argNodeMap[$name] : null;
if (!$argumentNode) {
if ($argDef->defaultValueExists()) {
$coercedValues[$name] = $argDef->defaultValue;
} else {
if ($argType instanceof NonNull) {
throw new Error('Argument "' . $name . '" of required type ' . '"' . Utils::printSafe($argType) . '" was not provided.', [$node]);
}
}
} else {
if ($argumentNode->value instanceof VariableNode) {
$variableName = $argumentNode->value->name->value;
if ($variableValues && array_key_exists($variableName, $variableValues)) {
// Note: this does not check that this variable value is correct.
// This assumes that this query has been validated and the variable
// usage here is of the correct type.
$coercedValues[$name] = $variableValues[$variableName];
} else {
if ($argDef->defaultValueExists()) {
$coercedValues[$name] = $argDef->defaultValue;
} else {
if ($argType instanceof NonNull) {
throw new Error('Argument "' . $name . '" of required type "' . Utils::printSafe($argType) . '" was ' . 'provided the variable "$' . $variableName . '" which was not provided ' . 'a runtime value.', [$argumentNode->value]);
}
}
}
} else {
$valueNode = $argumentNode->value;
$coercedValue = Utils\AST::valueFromAST($valueNode, $argType, $variableValues);
if ($coercedValue === $undefined) {
$errors = DocumentValidator::isValidLiteralValue($argType, $valueNode);
$message = !empty($errors) ? "\n" . implode("\n", $errors) : '';
throw new Error('Argument "' . $name . '" got invalid value ' . Printer::doPrint($valueNode) . '.' . $message, [$argumentNode->value]);
}
$coercedValues[$name] = $coercedValue;
}
}
}
return $coercedValues;
}