/**
* Given a variable definition, and any value of input, return a value which
* adheres to the variable definition, or throw an error.
*
* @param Schema $schema
* @param VariableDefinition $definition
* @param $input
*
* @return array|mixed|null|string
*
* @throws \Exception
*/
protected static function getVariableValue(Schema $schema, VariableDefinition $definition, $input)
{
$type = TypeInfo::typeFromAST($schema, $definition->get('type'));
if (!$type) {
return NULL;
}
if (self::isValidValue($type, $input)) {
if (!isset($input)) {
$default = $definition->get('defaultValue');
if ($default) {
return self::coerceValueAST($type, $default);
}
}
return self::coerceValue($type, $input);
}
// @todo Fix exception message once printer is ported.
throw new \Exception(sprintf('Variable $%s expected value of different type.', $definition->get('variable')->get('name')->get('value')));
}
/**
* Determines if a fragment is applicable to the given type.
*
* @param ExecutionContext $context
* @param $fragment
* @param ObjectType $type
*
* @return bool
*/
protected static function doesFragmentConditionMatch(ExecutionContext $context, $fragment, ObjectType $type)
{
$typeCondition = $fragment->get('typeCondition');
if (!$typeCondition) {
return TRUE;
}
$conditionalType = TypeInfo::typeFromAST($context->schema, $typeCondition);
if ($conditionalType->getName() === $type->getName()) {
return TRUE;
}
if ($conditionalType instanceof InterfaceType || $conditionalType instanceof UnionType) {
return $conditionalType->isPossibleType($type);
}
return FALSE;
}
