Adds Validation Rules

Sources/GraphQL/Language/AST.swift

@@ -401,7 +401,7 @@ public final class OperationDefinition {
             }
             return .array(variableDefinitions)
         case "directives":
-            guard !variableDefinitions.isEmpty else {
+            guard !directives.isEmpty else {
                 return nil
             }
             return .array(directives)
@@ -475,12 +475,20 @@ public final class VariableDefinition {
     public private(set) var variable: Variable
     public private(set) var type: Type
     public private(set) var defaultValue: Value?
+    public private(set) var directives: [Directive]
 
-    init(loc: Location? = nil, variable: Variable, type: Type, defaultValue: Value? = nil) {
+    init(
+        loc: Location? = nil,
+        variable: Variable,
+        type: Type,
+        defaultValue: Value? = nil,
+        directives: [Directive] = []
+    ) {
         self.loc = loc
         self.variable = variable
         self.type = type
         self.defaultValue = defaultValue
+        self.directives = directives
     }
 
     public func get(key: String) -> NodeResult? {
@@ -491,6 +499,11 @@ public final class VariableDefinition {
             return .node(type)
         case "defaultValue":
             return defaultValue.map { .node($0) }
+        case "directives":
+            guard !directives.isEmpty else {
+                return nil
+            }
+            return .array(directives)
         default:
             return nil
         }
@@ -525,6 +538,14 @@ public final class VariableDefinition {
                 return
             }
             self.defaultValue = defaultValue
+        case "directives":
+            guard
+                case let .array(values) = value,
+                let directives = values as? [Directive]
+            else {
+                return
+            }
+            self.directives = directives
         default:
             return
         }
@@ -1748,7 +1769,10 @@ extension OperationTypeDefinition: Equatable {
     }
 }
 
-public protocol TypeDefinition: TypeSystemDefinition {}
+public protocol TypeDefinition: TypeSystemDefinition {
+    var name: Name { get }
+}
+
 extension ScalarTypeDefinition: TypeDefinition {}
 extension ObjectTypeDefinition: TypeDefinition {}
 extension InterfaceTypeDefinition: TypeDefinition {}

Sources/GraphQL/Language/Parser.swift

@@ -276,7 +276,8 @@ func parseVariableDefinition(lexer: Lexer) throws -> VariableDefinition {
         variable: parseVariable(lexer: lexer),
         type: (expect(lexer: lexer, kind: .colon), parseTypeReference(lexer: lexer)).1,
         defaultValue: skip(lexer: lexer, kind: .equals) ?
-            parseValueLiteral(lexer: lexer, isConst: true) : nil
+            parseValueLiteral(lexer: lexer, isConst: true) : nil,
+        directives: parseDirectives(lexer: lexer)
     )
 }
 

Sources/GraphQL/Language/Printer.swift

@@ -48,8 +48,7 @@ extension OperationDefinition: Printable {
 extension VariableDefinition: Printable {
     var printed: String {
         variable + ": " + type.printed + wrap(" = ", defaultValue?.printed)
-//        + wrap(" ", join(directives, " "))
-        // TODO: variable directives are currently not supported
+            + wrap(" ", join(directives, " "))
     }
 }
 

Sources/GraphQL/Language/Visitor.swift

@@ -3,7 +3,7 @@ let QueryDocumentKeys: [Kind: [String]] = [
 
     .document: ["definitions"],
     .operationDefinition: ["name", "variableDefinitions", "directives", "selectionSet"],
-    .variableDefinition: ["variable", "type", "defaultValue"],
+    .variableDefinition: ["variable", "type", "defaultValue", "directives"],
     .variable: ["name"],
     .selectionSet: ["selections"],
     .field: ["alias", "name", "arguments", "directives", "selectionSet"],
@@ -304,9 +304,14 @@ func visitInParallel(visitors: [Visitor]) -> Visitor {
                     } else if case .node = result {
                         return result
                     }
-                } // else if case let .node(skippedNode) = skipping[i], skippedNode == node {
-//                    skipping[i] = nil
-//                }
+                } else if
+                    case let .node(skippedNodeValue) = skipping[i],
+                    let skippedNode = skippedNodeValue,
+                    skippedNode.kind == node.kind,
+                    skippedNode.loc == node.loc
+                {
+                    skipping[i] = nil
+                }
             }
 
             return .continue

Sources/GraphQL/SwiftUtilities/SuggestionList.swift

@@ -20,7 +20,12 @@ func suggestionList(
     }
     return optionsByDistance.keys.sorted {
         // Values are guaranteed non-nil since the keys come from the object itself
-        optionsByDistance[$0]! - optionsByDistance[$1]! != 0
+        let distanceDiff = optionsByDistance[$0]! - optionsByDistance[$1]!
+        if distanceDiff != 0 {
+            return distanceDiff < 0
+        } else {
+            return $0.lexicographicallyPrecedes($1)
+        }
     }
 }
 

Sources/GraphQL/Type/Definition.swift

@@ -1,5 +1,6 @@
 import Foundation
 import NIO
+import OrderedCollections
 
 /**
  * These are all of the possible kinds of types.
@@ -171,35 +172,22 @@ public final class GraphQLScalarType {
     public let kind: TypeKind = .scalar
 
     let serialize: (Any) throws -> Map
-    let parseValue: ((Map) throws -> Map)?
-    let parseLiteral: ((Value) throws -> Map)?
-
-    public init(
-        name: String,
-        description: String? = nil,
-        serialize: @escaping (Any) throws -> Map
-    ) throws {
-        try assertValid(name: name)
-        self.name = name
-        self.description = description
-        self.serialize = serialize
-        parseValue = nil
-        parseLiteral = nil
-    }
+    let parseValue: (Map) throws -> Map
+    let parseLiteral: (Value) throws -> Map
 
     public init(
         name: String,
         description: String? = nil,
         serialize: @escaping (Any) throws -> Map,
-        parseValue: @escaping (Map) throws -> Map,
-        parseLiteral: @escaping (Value) throws -> Map
+        parseValue: ((Map) throws -> Map)? = nil,
+        parseLiteral: ((Value) throws -> Map)? = nil
     ) throws {
         try assertValid(name: name)
         self.name = name
         self.description = description
         self.serialize = serialize
-        self.parseValue = parseValue
-        self.parseLiteral = parseLiteral
+        self.parseValue = parseValue ?? defaultParseValue
+        self.parseLiteral = parseLiteral ?? defaultParseLiteral
     }
 
     // Serializes an internal value to include in a response.
@@ -209,15 +197,23 @@ public final class GraphQLScalarType {
 
     // Parses an externally provided value to use as an input.
     public func parseValue(value: Map) throws -> Map {
-        return try parseValue?(value) ?? Map.null
+        return try parseValue(value)
     }
 
     // Parses an externally provided literal value to use as an input.
     public func parseLiteral(valueAST: Value) throws -> Map {
-        return try parseLiteral?(valueAST) ?? Map.null
+        return try parseLiteral(valueAST)
     }
 }
 
+let defaultParseValue: ((Map) throws -> Map) = { value in
+    value
+}
+
+let defaultParseLiteral: ((Value) throws -> Map) = { value in
+    try valueFromASTUntyped(valueAST: value)
+}
+
 extension GraphQLScalarType: Encodable {
     private enum CodingKeys: String, CodingKey {
         case name
@@ -513,7 +509,7 @@ public struct GraphQLResolveInfo {
     public let variableValues: [String: Any]
 }
 
-public typealias GraphQLFieldMap = [String: GraphQLField]
+public typealias GraphQLFieldMap = OrderedDictionary<String, GraphQLField>
 
 public struct GraphQLField {
     public let type: GraphQLOutputType
@@ -573,7 +569,7 @@ public struct GraphQLField {
     }
 }
 
-public typealias GraphQLFieldDefinitionMap = [String: GraphQLFieldDefinition]
+public typealias GraphQLFieldDefinitionMap = OrderedDictionary<String, GraphQLFieldDefinition>
 
 public final class GraphQLFieldDefinition {
     public let name: String
@@ -659,7 +655,7 @@ extension GraphQLFieldDefinition: KeySubscriptable {
     }
 }
 
-public typealias GraphQLArgumentConfigMap = [String: GraphQLArgument]
+public typealias GraphQLArgumentConfigMap = OrderedDictionary<String, GraphQLArgument>
 
 public struct GraphQLArgument {
     public let type: GraphQLInputType
@@ -1018,7 +1014,7 @@ public final class GraphQLEnumType {
         let mapValue = try map(from: value)
         guard let enumValue = valueLookup[mapValue] else {
             throw GraphQLError(
-                message: "Enum '\(name)' cannot represent value '\(mapValue)'."
+                message: "Enum \"\(name)\" cannot represent value: \(mapValue)."
             )
         }
         return .string(enumValue.name)
@@ -1027,13 +1023,13 @@ public final class GraphQLEnumType {
     public func parseValue(value: Map) throws -> Map {
         guard let valueStr = value.string else {
             throw GraphQLError(
-                message: "Enum '\(name)' cannot represent non-string value '\(value)'." +
+                message: "Enum \"\(name)\" cannot represent non-string value: \(value)." +
                     didYouMeanEnumValue(unknownValueStr: value.description)
             )
         }
         guard let enumValue = nameLookup[valueStr] else {
             throw GraphQLError(
-                message: "Value '\(valueStr)' does not exist in '\(name)' enum." +
+                message: "Value \"\(valueStr)\" does not exist in \"\(name)\" enum." +
                     didYouMeanEnumValue(unknownValueStr: valueStr)
             )
         }
@@ -1043,14 +1039,14 @@ public final class GraphQLEnumType {
     public func parseLiteral(valueAST: Value) throws -> Map {
         guard let enumNode = valueAST as? EnumValue else {
             throw GraphQLError(
-                message: "Enum '\(name)' cannot represent non-enum value '\(valueAST)'." +
-                    didYouMeanEnumValue(unknownValueStr: "\(valueAST)"),
+                message: "Enum \"\(name)\" cannot represent non-enum value: \(print(ast: valueAST))." +
+                    didYouMeanEnumValue(unknownValueStr: print(ast: valueAST)),
                 nodes: [valueAST]
             )
         }
         guard let enumValue = nameLookup[enumNode.value] else {
             throw GraphQLError(
-                message: "Value '\(enumNode)' does not exist in '\(name)' enum." +
+                message: "Value \"\(enumNode.value)\" does not exist in \"\(name)\" enum." +
                     didYouMeanEnumValue(unknownValueStr: enumNode.value),
                 nodes: [valueAST]
             )
@@ -1136,7 +1132,7 @@ func defineEnumValues(
     return definitions
 }
 
-public typealias GraphQLEnumValueMap = [String: GraphQLEnumValue]
+public typealias GraphQLEnumValueMap = OrderedDictionary<String, GraphQLEnumValue>
 
 public struct GraphQLEnumValue {
     public let value: Map
@@ -1317,7 +1313,7 @@ public struct InputObjectField {
     }
 }
 
-public typealias InputObjectFieldMap = [String: InputObjectField]
+public typealias InputObjectFieldMap = OrderedDictionary<String, InputObjectField>
 
 public final class InputObjectFieldDefinition {
     public let name: String
@@ -1384,7 +1380,14 @@ extension InputObjectFieldDefinition: KeySubscriptable {
     }
 }
 
-public typealias InputObjectFieldDefinitionMap = [String: InputObjectFieldDefinition]
+public func isRequiredInputField(_ field: InputObjectFieldDefinition) -> Bool {
+    return field.type is GraphQLNonNull && field.defaultValue == nil
+}
+
+public typealias InputObjectFieldDefinitionMap = OrderedDictionary<
+    String,
+    InputObjectFieldDefinition
+>
 
 /**
  * List Modifier

Sources/GraphQL/Type/Directives.swift

@@ -7,6 +7,7 @@ public enum DirectiveLocation: String, Encodable {
     case fragmentDefinition = "FRAGMENT_DEFINITION"
     case fragmentSpread = "FRAGMENT_SPREAD"
     case inlineFragment = "INLINE_FRAGMENT"
+    case variableDefinition = "VARIABLE_DEFINITION"
     // Schema Definitions
     case schema = "SCHEMA"
     case scalar = "SCALAR"
@@ -30,18 +31,21 @@ public struct GraphQLDirective: Encodable {
     public let description: String
     public let locations: [DirectiveLocation]
     public let args: [GraphQLArgumentDefinition]
+    public let isRepeatable: Bool
 
     public init(
         name: String,
-        description: String,
+        description: String = "",
         locations: [DirectiveLocation],
-        args: GraphQLArgumentConfigMap = [:]
+        args: GraphQLArgumentConfigMap = [:],
+        isRepeatable: Bool = false
     ) throws {
         try assertValid(name: name)
         self.name = name
         self.description = description
         self.locations = locations
         self.args = try defineArgumentMap(args: args)
+        self.isRepeatable = isRepeatable
     }
 }
 

Sources/GraphQL/Type/Introspection.swift

@@ -82,6 +82,7 @@ let __Directive = try! GraphQLObjectType(
     fields: [
         "name": GraphQLField(type: GraphQLNonNull(GraphQLString)),
         "description": GraphQLField(type: GraphQLString),
+        "isRepeatable": GraphQLField(type: GraphQLNonNull(GraphQLBoolean)),
         "locations": GraphQLField(type: GraphQLNonNull(GraphQLList(GraphQLNonNull(__DirectiveLocation)))),
         "args": GraphQLField(
             type: GraphQLNonNull(GraphQLList(GraphQLNonNull(__InputValue))),