Add specifiedByURL to scalar types

Author: lukel97

Sources/GraphQL/Type/Definition.swift

@@ -165,6 +165,7 @@ extension GraphQLNonNull : GraphQLWrapperType {}
 public final class GraphQLScalarType {
     public let name: String
     public let description: String?
+    public let specifiedByURL: String?
     public let kind: TypeKind = .scalar
 
     let serialize: (Any) throws -> Map
@@ -174,11 +175,13 @@ public final class GraphQLScalarType {
     public init(
         name: String,
         description: String? = nil,
+        specifiedByURL: String? = nil,
         serialize: @escaping (Any) throws -> Map
     ) throws {
         try assertValid(name: name)
         self.name = name
         self.description = description
+        self.specifiedByURL = specifiedByURL
         self.serialize = serialize
         self.parseValue = nil
         self.parseLiteral = nil
@@ -187,13 +190,15 @@ public final class GraphQLScalarType {
     public init(
         name: String,
         description: String? = nil,
+        specifiedByURL: String? = nil,
         serialize: @escaping (Any) throws -> Map,
         parseValue: @escaping (Map) throws -> Map,
         parseLiteral: @escaping (Value) throws -> Map
     ) throws {
         try assertValid(name: name)
         self.name = name
         self.description = description
+        self.specifiedByURL = specifiedByURL
         self.serialize = serialize
         self.parseValue = parseValue
         self.parseLiteral = parseLiteral

Sources/GraphQL/Type/Introspection.swift

@@ -179,15 +179,11 @@ let __DirectiveLocation = try! GraphQLEnumType(
 
 let __Type: GraphQLObjectType = try! GraphQLObjectType(
     name: "__Type",
-    description:
-    "The fundamental unit of any GraphQL Schema is the type. There are " +
-    "many kinds of types in GraphQL as represented by the `__TypeKind` enum." +
-    "\n\nDepending on the kind of a type, certain fields describe " +
-    "information about that type. Scalar types provide no information " +
-    "beyond a name and description, while Enum types provide their values. " +
-    "Object and Interface types provide the fields they describe. Abstract " +
-    "types, Union and Interface, provide the Object types possible " +
-    "at runtime. List and NonNull types compose other types.",
+    description: """
+    The fundamental unit of any GraphQL Schema is the type. There are many kinds of types in GraphQL as represented by the `__TypeKind` enum.
+    
+    Depending on the kind of a type, certain fields describe information about that type. Scalar types provide no information beyond a name, description and optional `specifiedByURL`, while Enum types provide their values. Object and Interface types provide the fields they describe. Abstract types, Union and Interface, provide the Object types possible at runtime. List and NonNull types compose other types.
+    """,
     fields: [
         "kind": GraphQLField(
             type: GraphQLNonNull(__TypeKind),
@@ -216,6 +212,7 @@ let __Type: GraphQLObjectType = try! GraphQLObjectType(
         ),
         "name": GraphQLField(type: GraphQLString),
         "description": GraphQLField(type: GraphQLString),
+        "specifiedByURL": GraphQLField(type: GraphQLString),
         "fields": GraphQLField(
             type: GraphQLList(GraphQLNonNull(__Field)),
             args: [

Sources/GraphQL/Utilities/BuildClientSchema.swift

@@ -92,6 +92,7 @@ public func buildClientSchema(introspection: IntrospectionQuery) throws -> Graph
             return try GraphQLScalarType(
                 name: type.name,
                 description: type.description,
+                specifiedByURL: type.specifiedByURL,
                 serialize: { try map(from: $0) }
             )
         case let type as IntrospectionObjectType:

Sources/GraphQL/Utilities/GetIntrospectionQuery.swift

@@ -1,13 +1,13 @@
 public func getIntrospectionQuery(
     descriptions: Bool = true,
-    specifiedByUrl: Bool = false,
+    specifiedByURL: Bool = false,
     directiveIsRepeatable: Bool = false,
     schemaDescription: Bool = false,
     inputValueDeprecation: Bool = false
 ) -> String {
 
     let descriptions = descriptions ? "description" : ""
-    let specifiedByUrl = specifiedByUrl ? "specifiedByURL" : ""
+    let specifiedByURL = specifiedByURL ? "specifiedByURL" : ""
     let directiveIsRepeatable = directiveIsRepeatable ? "isRepeatable" : ""
     let schemaDescription = schemaDescription ? descriptions : ""
 
@@ -40,7 +40,7 @@ public func getIntrospectionQuery(
       kind
       name
       \(descriptions)
-      \(specifiedByUrl)
+      \(specifiedByURL)
       fields(includeDeprecated: true) {
         name
         \(descriptions)