Change inner structs and enums to extensions

Move protocol implementation to extension

Sources/ElasticsearchNIOClient/ElasticsearchClient+ValidationError.swift

@@ -1,7 +1,7 @@
 import Foundation
 
 extension ElasticsearchClient {
-    public struct ValidationError: LocalizedError, Equatable {
+    public struct ValidationError: LocalizedError {
         public static let invalidURLString = ValidationError(.invalidURLString)
         public static let missingURLScheme = ValidationError(.missingURLScheme)
         public static let invalidURLScheme = ValidationError(.invalidURLScheme)
@@ -12,28 +12,32 @@ extension ElasticsearchClient {
         private let kind: Kind
 
         private init(_ kind: Kind) { self.kind = kind }
+    }
+}
+
+extension ElasticsearchClient.ValidationError: Equatable {
+    public static func ==(lhs: ElasticsearchClient.ValidationError, rhs: ElasticsearchClient.ValidationError) -> Bool {
+        return lhs.kind == rhs.kind
+    }
+}
+
+extension ElasticsearchClient.ValidationError {
+    private enum Kind: LocalizedError {
+        case invalidURLString
+        case missingURLScheme
+        case invalidURLScheme
+        case missingURLHost
 
-        public static func ==(lhs: ValidationError, rhs: ValidationError) -> Bool {
-            return lhs.kind == rhs.kind
-        }
-
-        private enum Kind: LocalizedError {
-            case invalidURLString
-            case missingURLScheme
-            case invalidURLScheme
-            case missingURLHost
-
-            var localizedDescription: String {
-                let message: String = {
-                    switch self {
-                    case .invalidURLString: return "invalid URL string"
-                    case .missingURLScheme: return "URL scheme is missing"
-                    case .invalidURLScheme: return "invalid URL scheme, expected 'http' or 'https'"
-                    case .missingURLHost: return "missing remote hostname"
-                    }
-                }()
-                return "Elasticsearch connection configuration validation failed: \(message)"
-            }
+        var localizedDescription: String {
+            let message: String = {
+                switch self {
+                case .invalidURLString: return "invalid URL string"
+                case .missingURLScheme: return "URL scheme is missing"
+                case .invalidURLScheme: return "invalid URL scheme, expected 'http' or 'https'"
+                case .missingURLHost: return "missing remote hostname"
+                }
+            }()
+            return "Elasticsearch connection configuration validation failed: \(message)"
         }
     }
 }

Sources/ElasticsearchNIOClient/Models/ESMultipleDocumentResponse.swift

@@ -1,19 +1,25 @@
 import Foundation
 
 public struct ESGetMultipleDocumentsResponse<Document: Decodable>: Decodable {
-    public struct Hits: Decodable {
-        public struct Total: Decodable {
-            public let value: Int
-            public let relation: Relation
-
-            public enum Relation: String, Decodable {
-                case eq, gte
-            }
-        }
+    public let hits: Hits
+}
 
+extension ESGetMultipleDocumentsResponse {
+    public struct Hits: Decodable {
         public let total: Total?
         public let hits: [ESGetSingleDocumentResponse<Document>]
     }
+}
 
-    public let hits: Hits
+extension ESGetMultipleDocumentsResponse.Hits {
+    public struct Total: Decodable {
+        public let value: Int
+        public let relation: Relation
+    }
+}
+
+extension ESGetMultipleDocumentsResponse.Hits.Total {
+    public enum Relation: String, Decodable {
+        case eq, gte
+    }
 }