// This example shows how to use an action to define what happens when an OPC client writes to a data variable. This is an
// example of the push data consumption model.
// You can use any OPC UA client, including our Connectivity Explorer and OpcCmd utility, to connect to the server. 
//
// Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
// OPC client, server and subscriber examples in C# on GitHub: https://github.com/OPCLabs/Examples-OPCStudio-CSharp .
// Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own
// a commercial license in order to use Online Forums, and we reply to every post.

using System;
using OpcLabs.EasyOpc.UA;
using OpcLabs.EasyOpc.UA.NodeSpace;

namespace UAServerDocExamples._UADataVariable
{
    partial class WriteValueAction
    {
        public static void Main1()
        {
            // Instantiate the server object.
            // By default, the server will run on endpoint URL "opc.tcp://localhost:48040/".
            var server = new EasyUAServer();

            // Create a writable data variable and add an action that will be executed when the data variable is written to.
            server.Add(new UADataVariable("WriteToThisVariable").WriteValueAction<int>(value => 
                Console.WriteLine($"Value written: {value}")));

            // Start the server.
            Console.WriteLine("The server is starting...");
            server.Start();

            Console.WriteLine("The server is started.");
            Console.WriteLine("Any value written to the example data variable will be displayed on the console.");
            Console.WriteLine();

            // Let the user decide when to stop.
            Console.WriteLine("Press Enter to stop the server...");
            Console.ReadLine();

            // Stop the server.
            Console.WriteLine("The server is stopping...");
            server.Stop();

            Console.WriteLine("The server is stopped.");
        }
    }
}

// This example shows how to define a data variable of OPC data type ByteString and use an action to its write behavior.
// This is an example of the push data consumption model.
// You can use any OPC UA client, including our Connectivity Explorer and OpcCmd utility, to connect to the server. 
//
// Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
// OPC client, server and subscriber examples in C# on GitHub: https://github.com/OPCLabs/Examples-OPCStudio-CSharp .
// Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own
// a commercial license in order to use Online Forums, and we reply to every post.

using System;
using OpcLabs.EasyOpc.UA;
using OpcLabs.EasyOpc.UA.NodeSpace;

namespace UAServerDocExamples._UADataVariable
{
    partial class WriteValueAction
    {
        public static void ByteString()
        {
            // Instantiate the server object.
            // By default, the server will run on endpoint URL "opc.tcp://localhost:48040/".
            var server = new EasyUAServer();

            // Create a writable data variable and add an action that will be executed when the data variable is written to.
            server.Add(new UADataVariable("WriteToThisVariable").WriteValueAction<byte[]>(value => 
                Console.WriteLine($"Value written: {((value is null) ? String.Empty : BitConverter.ToString(value))}")));

            // Start the server.
            Console.WriteLine("The server is starting...");
            server.Start();

            Console.WriteLine("The server is started.");
            Console.WriteLine("Any value written to the example data variable will be displayed on the console.");
            Console.WriteLine();

            // Let the user decide when to stop.
            Console.WriteLine("Press Enter to stop the server...");
            Console.ReadLine();

            // Stop the server.
            Console.WriteLine("The server is stopping...");
            server.Stop();

            Console.WriteLine("The server is stopped.");
        }
    }
}

// This example shows how to use an action to define what happens when an OPC client writes to a data variable. The data
// variable is defined as write-only.
// You can use any OPC UA client, including our Connectivity Explorer and OpcCmd utility, to connect to the server. 
//
// Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
// OPC client, server and subscriber examples in C# on GitHub: https://github.com/OPCLabs/Examples-OPCStudio-CSharp .
// Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own
// a commercial license in order to use Online Forums, and we reply to every post.

using System;
using OpcLabs.EasyOpc.UA;
using OpcLabs.EasyOpc.UA.NodeSpace;

namespace UAServerDocExamples._UADataVariable
{
    partial class WriteValueAction
    {
        public static void WriteOnly1()
        {
            // Instantiate the server object.
            // By default, the server will run on endpoint URL "opc.tcp://localhost:48040/".
            var server = new EasyUAServer();

            // Create a writable data variable and add an action that will be executed when the data variable is written to.
            // Also, set the data variable to be write-only.
            server.Add(new UADataVariable("WriteToThisVariable").Readable(false).WriteValueAction<int>(value => 
                Console.WriteLine($"Value written: {value}")));

            // Start the server.
            Console.WriteLine("The server is starting...");
            server.Start();

            Console.WriteLine("The server is started.");
            Console.WriteLine("Any value written to the example data variable will be displayed on the console.");
            Console.WriteLine();

            // Let the user decide when to stop.
            Console.WriteLine("Press Enter to stop the server...");
            Console.ReadLine();

            // Stop the server.
            Console.WriteLine("The server is stopping...");
            server.Stop();

            Console.WriteLine("The server is stopped.");
        }
    }
}

//
// Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
// OPC client, server and subscriber examples in C# on GitHub: https://github.com/OPCLabs/Examples-OPCStudio-CSharp .
// Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own
// a commercial license in order to use Online Forums, and we reply to every post.

using System;
using OpcLabs.EasyOpc.UA.NodeSpace;

namespace UAServerDemoLibrary
{
    static public class ConsoleNodes
    {
        /// <summary>
        /// Adds nodes that allow interaction with the console.
        /// </summary>
        /// <param name="parentFolder">The folder to which to add the nodes.</param>
        /// <remarks>
        /// <para>
        /// The Console nodes allow OPC UA clients to display data on the OPC UA server's console (if it has such device).
        /// They are included mainly for the fun of it, to demonstrate the fact that any actions can be tied to the OPC write
        /// operations. Real OPC servers will not do this.</para>
        /// </remarks>
        static public void AddToParent(UAFolder parentFolder)
        {
            // Create the Console folder.
            UAFolder consoleFolder = new UAFolder("Console")
            {
                // The Write data variable writes the value to the console.
                new UADataVariable("Write")
                    .Readable(false)
                    .WriteValueAction((string s) => Console.Write(s)),
                // The WriteLine data variable writes the value to the console and appends a new line.
                new UADataVariable("WriteLine")
                    .Readable(false)
                    .WriteValueAction((string s) => Console.WriteLine(s))
            };
            parentFolder.Add(consoleFolder);
        }
    }
}