extract network part to protcol

Sources/HPRTMP/Network.swift

@@ -0,0 +1,43 @@
+
+
+import Foundation
+import Network
+
+protocol RTMPConnectable {
+  func connect(host: String, port: UInt16) async throws
+  func sendData(_ data: Data) async throws
+  func receiveData() async throws -> Data
+}
+
+actor NWConnecter: RTMPConnectable {
+  private var connection: NWConnection?
+
+  public func connect(host: String, port: UInt16) async throws {
+    let connection = NWConnection(host: NWEndpoint.Host(host), port: NWEndpoint.Port(rawValue: port) ?? 1935, using: .tcp)
+    self.connection = connection
+    connection.stateUpdateHandler = { [weak self] newState in
+      guard let self else { return }
+      Task {
+        switch newState {
+        case .ready:
+          break
+        case .failed(let error):
+          break
+        default:
+          break
+        }
+      }
+    }
+//    NWConnection.maxReadSize = Int((await windowControl.windowSize))
+    connection.start(queue: DispatchQueue.global(qos: .default))
+  }
+
+  func sendData(_ data: Data) async throws {
+    try await connection?.sendData(data)
+  }
+
+  func receiveData() async throws -> Data {
+    guard let connection = self.connection else { return Data() }
+    return try await connection.receiveData()
+  }
+}