func register()

in deployment/macos/diagnostic/SystemExtensionTester/TestSystemExtension/IPCConnection.swift [58:85]

• 21 lines of code
• 1 McCabe index (conditional complexity)

    func register(withExtension bundle: Bundle, completionHandler: @escaping (Bool) -> Void) {

        guard currentConnection == nil else {
            os_log("Already registered with the provider")
            completionHandler(true)
            return
        }

        let machServiceName = extensionMachServiceName(from: bundle)
        let newConnection = NSXPCConnection(machServiceName: machServiceName, options: [])

        // The remote object is the provider's IPCConnection instance.
        newConnection.remoteObjectInterface = NSXPCInterface(with: ProviderCommunication.self)

        currentConnection = newConnection
        newConnection.resume()

        guard let providerProxy = newConnection.remoteObjectProxyWithErrorHandler({ registerError in
            os_log("Failed to register with the provider: %@", registerError.localizedDescription)
            self.currentConnection?.invalidate()
            self.currentConnection = nil
            completionHandler(false)
        }) as? ProviderCommunication else {
            fatalError("Failed to create a remote object proxy for the provider")
        }

        providerProxy.register(completionHandler)
    }