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Sources/Nats/NatsMessage.swift

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+// Copyright 2024 The NATS Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import Foundation
+
+public struct NatsMessage {
+    public let payload: Data?
+    public let subject: String
+    public let replySubject: String?
+    public let length: Int
+    public let headers: NatsHeaderMap?
+    public let status: StatusCode?
+    public let description: String?
+}
+
+public struct StatusCode: Equatable {
+    public static let idleHeartbeat = StatusCode(value: 100)
+    public static let ok = StatusCode(value: 200)
+    public static let badRequest = StatusCode(value: 400)
+    public static let notFound = StatusCode(value: 404)
+    public static let timeout = StatusCode(value: 408)
+    public static let noResponders = StatusCode(value: 503)
+    public static let requestTerminated = StatusCode(value: 409)
+
+    let value: UInt16
+
+    // non-optional initializer for static status codes
+    private init(value: UInt16) {
+        self.value = value
+    }
+
+    init?(_ value: UInt16) {
+        if !(100..<1000 ~= value) {
+            return nil
+        }
+
+        self.value = value
+    }
+
+    init?(_ value: any StringProtocol) {
+        guard let status = UInt16(value) else {
+            return nil
+        }
+        if !(100..<1000 ~= status) {
+            return nil
+        }
+
+        self.value = status
+    }
+}