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<?php |
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namespace Digia\GraphQL\Util; |
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use Digia\GraphQL\Util\ConversionException; |
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use Digia\GraphQL\Error\InvariantException; |
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use Digia\GraphQL\Language\SyntaxErrorException; |
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use Digia\GraphQL\Language\Node\BooleanValueNode; |
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use Digia\GraphQL\Language\Node\EnumValueNode; |
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use Digia\GraphQL\Language\Node\FloatValueNode; |
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use Digia\GraphQL\Language\Node\IntValueNode; |
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use Digia\GraphQL\Language\Node\ListValueNode; |
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use Digia\GraphQL\Language\Node\NameNode; |
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use Digia\GraphQL\Language\Node\NodeKindEnum; |
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use Digia\GraphQL\Language\Node\NullValueNode; |
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use Digia\GraphQL\Language\Node\ObjectFieldNode; |
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use Digia\GraphQL\Language\Node\ObjectValueNode; |
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use Digia\GraphQL\Language\Node\StringValueNode; |
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use Digia\GraphQL\Language\Node\ValueNodeInterface; |
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use Digia\GraphQL\Type\Definition\EnumType; |
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use Digia\GraphQL\Type\Definition\InputField; |
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use Digia\GraphQL\Type\Definition\InputObjectType; |
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use Digia\GraphQL\Type\Definition\ListType; |
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use Digia\GraphQL\Type\Definition\NonNullType; |
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use Digia\GraphQL\Type\Definition\ScalarType; |
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use Digia\GraphQL\Type\Definition\SerializableTypeInterface; |
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use Digia\GraphQL\Type\Definition\TypeInterface; |
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use function Digia\GraphQL\Type\idType; |
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class ValueConverter |
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{ |
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/** |
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* Produces a GraphQL Value AST given a PHP value. |
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* |
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* A GraphQL type must be provided, which will be used to interpret different |
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* PHP values. |
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* |
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* | JSON Value | GraphQL Value | |
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* | ------------- | -------------------- | |
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* | Object | Input Object | |
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* | Array | List | |
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* | Boolean | Boolean | |
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* | String | String / Enum Value | |
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* | Number | Int / Float | |
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* | Mixed | Enum Value | |
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* | null | NullValue | |
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* |
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* @param mixed $value |
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* @param TypeInterface $type |
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* @return ValueNodeInterface|null |
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* @throws InvariantException |
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* @throws SyntaxErrorException |
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* @throws ConversionException |
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*/ |
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public static function convert($value, TypeInterface $type): ?ValueNodeInterface |
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{ |
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if ($type instanceof NonNullType) { |
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$node = self::convert($value, $type->getOfType()); |
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return null !== $node && $node->getKind() === NodeKindEnum::NULL ? null : $node; |
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} |
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if (null === $value) { |
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return new NullValueNode(null); |
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} |
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// Convert PHP array to GraphQL list. If the GraphQLType is a list, but |
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// the value is not an array, convert the value using the list's item type. |
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if ($type instanceof ListType) { |
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return self::convertListType($value, $type); |
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} |
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if ($type instanceof ScalarType || $type instanceof EnumType) { |
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return self::convertScalarOrEnum($value, $type); |
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} |
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throw new ConversionException(\sprintf('Unknown type: %s.', (string)$type)); |
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} |
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/** |
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* @param mixed $value |
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* @param ListType $type |
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* @return ValueNodeInterface|null |
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* @throws InvariantException |
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* @throws SyntaxErrorException |
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* @throws ConversionException |
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*/ |
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protected static function convertListType($value, ListType $type): ?ValueNodeInterface |
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{ |
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$itemType = $type->getOfType(); |
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if (!\is_iterable($value)) { |
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return self::convert($value, $itemType); |
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} |
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$nodes = []; |
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foreach ($value as $item) { |
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$itemNode = self::convert($item, $itemType); |
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if (null !== $itemNode) { |
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$nodes[] = $itemNode; |
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} |
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} |
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return new ListValueNode($nodes, null); |
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} |
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/** |
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* @param mixed $value |
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* @param SerializableTypeInterface $type |
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* @return ValueNodeInterface|null |
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* @throws ConversionException |
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*/ |
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protected static function convertScalarOrEnum($value, SerializableTypeInterface $type): ?ValueNodeInterface |
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{ |
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// Since value is an internally represented value, it must be serialized |
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// to an externally represented value before converting into an AST. |
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$serialized = $type->serialize($value); |
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if (null === $serialized) { |
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return null; |
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} |
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// Others serialize based on their corresponding JavaScript scalar types. |
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if (\is_bool($serialized)) { |
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return new BooleanValueNode($serialized, null); |
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} |
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if (\is_float($serialized)) { |
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return new FloatValueNode($serialized, null); |
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} |
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if (\is_int($serialized)) { |
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return new IntValueNode($serialized, null); |
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} |
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if (\is_string($serialized)) { |
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// Enum types use Enum literals. |
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if ($type instanceof EnumType) { |
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return new EnumValueNode($serialized, null); |
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} |
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// ID types can use Int literals. |
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if (idType() === $type && \is_numeric($serialized)) { |
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return new IntValueNode($serialized, null); |
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} |
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return new StringValueNode($serialized, false, null); |
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} |
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throw new ConversionException(\sprintf('Cannot convert value to AST: %s', $serialized)); |
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} |
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} |
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digiaonline /
graphql-php
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