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feat: Allows mutating scalar parse and serialization #187

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Merged
NeedleInAJayStack merged 1 commit into from
Sep 30, 2026
Merged

feat: Allows mutating scalar parse and serialization #187

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40 changes: 33 additions & 7 deletions Sources/GraphQL/Type/Definition.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -135,17 +135,37 @@ extension GraphQLNonNull: GraphQLWrapperType {}
/// try $0.map.asBool(converting: true)
/// }
/// )
public final class GraphQLScalarType: Sendable {
public final class GraphQLScalarType: @unchecked Sendable {
public let name: String
public let description: String?
public let specifiedByURL: String?
public let astNode: ScalarTypeDefinition?
public let extensionASTNodes: [ScalarExtensionDefinition]
public let kind: TypeKind = .scalar

let serialize: @Sendable (Any) throws -> Map
let parseValue: @Sendable (Map) throws -> Map
let parseLiteral: @Sendable (Value) throws -> Map
/// The serialization of scalar values. This may be mutated during setup, but should not be
/// modified once the schema is being used for execution.
public var serialize: @Sendable (Any) throws -> Map {
get { scalarPropertyQueue.sync { _serialize } }
set { scalarPropertyQueue.sync(flags: .barrier) { _serialize = newValue } }
}
private var _serialize: @Sendable (Any) throws -> Map

/// The parsing of scalar values from the provided JSON Map. This may be mutated during setup, but should not be
/// modified once the schema is being used for execution.
public var parseValue: @Sendable (Map) throws -> Map {
get { scalarPropertyQueue.sync { _parseValue } }
set { scalarPropertyQueue.sync(flags: .barrier) { _parseValue = newValue } }
}
private var _parseValue: @Sendable (Map) throws -> Map

/// The parsing of scalar values from the provided Value literal. This may be mutated during setup, but should not be
/// modified once the schema is being used for execution.
public var parseLiteral: @Sendable (Value) throws -> Map {
get { scalarPropertyQueue.sync { _parseLiteral } }
set { scalarPropertyQueue.sync(flags: .barrier) { _parseLiteral = newValue } }
}
private var _parseLiteral: @Sendable (Value) throws -> Map

public init(
name: String,
Expand All @@ -163,9 +183,9 @@ public final class GraphQLScalarType: Sendable {
self.specifiedByURL = specifiedByURL
self.astNode = astNode
self.extensionASTNodes = extensionASTNodes
self.serialize = serialize
self.parseValue = parseValue ?? defaultParseValue
self.parseLiteral = parseLiteral ?? defaultParseLiteral
_serialize = serialize
_parseValue = parseValue ?? defaultParseValue
_parseLiteral = parseLiteral ?? defaultParseLiteral
}

/// Serializes an internal value to include in a response.
Expand Down Expand Up @@ -1421,3 +1441,9 @@ private let fieldPropertyQueue = DispatchQueue(
label: "graphql.field.properties",
attributes: .concurrent
)

/// Shared reader/writer queue for scalar callbacks.
private let scalarPropertyQueue = DispatchQueue(
label: "graphql.scalar.properties",
attributes: .concurrent
)
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