RGB.NET/RGB.NET.Devices.DMX/DMXDeviceProvider.cs

// ReSharper disable MemberCanBePrivate.Global
// ReSharper disable UnusedMember.Global

using System;
using System.Collections.Generic;
using RGB.NET.Core;
using RGB.NET.Devices.DMX.E131;

namespace RGB.NET.Devices.DMX
{
    /// <inheritdoc />
    /// <summary>
    /// Represents a device provider responsible for DMX devices.
    /// </summary>
    public class DMXDeviceProvider : AbstractRGBDeviceProvider
    {
        #region Properties & Fields

        private static DMXDeviceProvider? _instance;
        /// <summary>
        /// Gets the singleton <see cref="DMXDeviceProvider"/> instance.
        /// </summary>
        public static DMXDeviceProvider Instance => _instance ?? new DMXDeviceProvider();

        /// <summary>
        /// Gets a list of all defined device-definitions.
        /// </summary>
        public List<IDMXDeviceDefinition> DeviceDefinitions { get; } = new();

        #endregion

        #region Constructors

        /// <summary>
        /// Initializes a new instance of the <see cref="DMXDeviceProvider"/> class.
        /// </summary>
        /// <exception cref="InvalidOperationException">Thrown if this constructor is called even if there is already an instance of this class.</exception>
        public DMXDeviceProvider()
        {
            if (_instance != null) throw new InvalidOperationException($"There can be only one instance of type {nameof(DMXDeviceProvider)}");
            _instance = this;
        }

        #endregion

        #region Methods

        /// <summary>
        /// Adds the given <see cref="IDMXDeviceDefinition" /> to this device-provider.
        /// </summary>
        /// <param name="deviceDefinition">The <see cref="IDMXDeviceDefinition"/> to add.</param>
        public void AddDeviceDefinition(IDMXDeviceDefinition deviceDefinition) => DeviceDefinitions.Add(deviceDefinition);

        protected override void InitializeSDK() { }

        protected override IEnumerable<IRGBDevice> LoadDevices()
        {
            foreach (IDMXDeviceDefinition dmxDeviceDefinition in DeviceDefinitions)
            {
                IRGBDevice? device = null;
                try
                {
                    if (dmxDeviceDefinition is E131DMXDeviceDefinition e131DMXDeviceDefinition)
                        if (e131DMXDeviceDefinition.Leds.Count > 0)
                            device = new E131Device(new E131DeviceInfo(e131DMXDeviceDefinition), e131DMXDeviceDefinition.Leds, GetUpdateTrigger(0));
                }
                catch (Exception ex)
                {
                    Throw(ex);
                }

                if (device != null)
                    yield return device;
            }
        }

        #endregion
    }
}