JSONConverter helper

.package.resolved

@@ -1,14 +1,5 @@
 {
   "pins" : [
-    {
-      "identity" : "apollo-ios",
-      "kind" : "remoteSourceControl",
-      "location" : "https://github.com/apollographql/apollo-ios.git",
-      "state" : {
-        "revision" : "99dfbdb869dbba16bd09e086b2b669bfcab811ec",
-        "version" : "1.12.2"
-      }
-    },
     {
       "identity" : "cwlcatchexception",
       "kind" : "remoteSourceControl",
@@ -50,17 +41,17 @@
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/stephencelis/SQLite.swift.git",
       "state" : {
-        "revision" : "f0af5e0a2b6917ae38e3019e3456fd0fa9365864",
-        "version" : "0.15.1"
+        "revision" : "a95fc6df17d108bd99210db5e8a9bac90fe984b8",
+        "version" : "0.15.3"
       }
     },
     {
       "identity" : "swift-argument-parser",
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/apple/swift-argument-parser.git",
       "state" : {
-        "revision" : "46989693916f56d1186bd59ac15124caef896560",
-        "version" : "1.3.1"
+        "revision" : "0fbc8848e389af3bb55c182bc19ca9d5dc2f255b",
+        "version" : "1.4.0"
       }
     },
     {

Tests/ApolloTests/JSONTests.swift

@@ -99,4 +99,77 @@ class JSONTests: XCTestCase {
 
     XCTAssertEqual(stringFromSerialized, #"{"aWeirdNull":null}"#)
   }
+
+  func testJSONConvertSelectionSetEncoding() throws {
+    class Hero: MockSelectionSet {
+      typealias Schema = MockSchemaMetadata
+
+      override class var __selections: [Selection] {[
+        .field("__typename", String.self),
+        .field("name", String?.self)
+      ]}
+
+      var name: String? { __data["name"] }
+    }
+
+    let expected: JSONObject = [
+      "__typename": "Human",
+      "name": "Johnny Tsunami"
+    ]
+
+    let converted = try JSONConverter.convert(Hero(data: expected))
+    XCTAssertEqual(converted, expected)
+  }
+
+  func testJSONConvertGraphQLResultEncoding() throws {
+    class MockData: MockSelectionSet {
+      typealias Schema = MockSchemaMetadata
+
+      override class var __selections: [Selection] {[
+        .field("hero", Hero?.self)
+      ]}
+
+      var hero: Hero? { __data["hero"] }
+
+      class Hero: MockSelectionSet {
+        typealias Schema = MockSchemaMetadata
+
+        override class var __selections: [Selection] {[
+          .field("__typename", String.self),
+          .field("name", String?.self)
+        ]}
+
+        var name: String? { __data["name"] }
+      }
+    }
+
+    let jsonObj: [String: AnyHashable] = [
+      "hero": [
+        "name": "Luke Skywalker",
+        "__typename": "Human"
+      ]
+    ]
+
+    let heroData = try MockData(data: jsonObj)
+
+    let result = GraphQLResult(
+      data: heroData,
+      extensions: nil,
+      errors: nil,
+      source: .server,
+      dependentKeys: nil
+    )
+
+    let expected: [String: Any] = [
+      "data": [
+        "hero": [
+          "name": "Luke Skywalker",
+          "__typename": "Human"
+        ]
+      ]
+    ]
+
+    let converted = JSONConverter.convert(result)
+    XCTAssertEqual(converted, expected)
+  }
 }

apollo-ios/Sources/Apollo/GraphQLError.swift

@@ -89,11 +89,6 @@ extension GraphQLError: LocalizedError {
 
 extension GraphQLError {
   func asJSONDictionary() -> [String: Any] {
-    var dict: [String: Any] = [:]
-    if let message = self["message"] { dict["message"] = message }
-    if let locations = self["locations"] { dict["locations"] = locations }
-    if let path = self["path"] { dict["path"] = path }
-    if let extensions = self["extensions"] { dict["extensions"] = extensions }
-    return dict
+    JSONConverter.convert(self)
   }
 }

apollo-ios/Sources/Apollo/GraphQLResult.swift

@@ -55,24 +55,9 @@ extension GraphQLResult {
   /// - Returns: A `[String: Any]` JSON dictionary representing the ``GraphQLResult``.
   public func asJSONDictionary() -> [String: Any] {
     var dict: [String: Any] = [:]
-    if let data { dict["data"] = convert(value: data.__data) }
+    if let data { dict["data"] = JSONConverter.convert(data) }
     if let errors { dict["errors"] = errors.map { $0.asJSONDictionary() } }
     if let extensions { dict["extensions"] = extensions }
     return dict
   }
-
-  private func convert(value: Any) -> Any {
-      var val: Any = value
-      if let value = value as? DataDict {
-          val = value._data
-      } else if let value = value as? (any CustomScalarType) {
-          val = value._jsonValue
-      }
-      if let dict = val as? [String: Any] {
-          return dict.mapValues(convert)
-      } else if let arr = val as? [Any] {
-          return arr.map(convert)
-      }
-      return val
-  }
 }

apollo-ios/Sources/Apollo/JSONConverter.swift

@@ -0,0 +1,52 @@
+import Foundation
+#if !COCOAPODS
+import ApolloAPI
+#endif
+
+public enum JSONConverter {
+
+  /// Converts a ``SelectionSet`` into a basic JSON dictionary for use.
+  ///
+  /// - Returns: A `[String: Any]` JSON dictionary representing the ``SelectionSet``.
+  public static func convert(_ selectionSet: some SelectionSet) -> [String: Any] {
+    selectionSet.__data._data.mapValues(convert(value:))
+  }
+
+  static func convert(_ dataDict: DataDict) -> [String: Any] {
+    dataDict._data.mapValues(convert(value:))
+  }
+
+  /// Converts a ``GraphQLResult`` into a basic JSON dictionary for use.
+  ///
+  /// - Returns: A `[String: Any]` JSON dictionary representing the ``GraphQLResult``.
+  public static func convert<T>(_ result: GraphQLResult<T>) -> [String: Any] {
+    result.asJSONDictionary()
+  }
+
+  /// Converts a ``GraphQLError`` into a basic JSON dictionary for use.
+  ///
+  /// - Returns: A `[String: Any]` JSON dictionary representing the ``GraphQLError``.
+  public static func convert(_ error: GraphQLError) -> [String: Any] {
+    var dict: [String: Any] = [:]
+    if let message = error["message"] { dict["message"] = message }
+    if let locations = error["locations"] { dict["locations"] = locations }
+    if let path = error["path"] { dict["path"] = path }
+    if let extensions = error["extensions"] { dict["extensions"] = extensions }
+    return dict
+  }
+
+  private static func convert(value: Any) -> Any {
+      var val: Any = value
+      if let value = value as? DataDict {
+          val = value._data
+      } else if let value = value as? any CustomScalarType {
+          val = value._jsonValue
+      }
+      if let dict = val as? [String: Any] {
+          return dict.mapValues(convert)
+      } else if let arr = val as? [Any] {
+          return arr.map(convert)
+      }
+      return val
+  }
+}