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360 lines
14 KiB
C#
360 lines
14 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Collections.ObjectModel;
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using Rssdp.Infrastructure;
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namespace Rssdp
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{
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/// <summary>
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/// Base class representing the common details of a (root or embedded) device, either to be published or that has been located.
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/// </summary>
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/// <remarks>
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/// <para>Do not derive new types directly from this class. New device classes should derive from either <see cref="SsdpRootDevice"/> or <see cref="SsdpEmbeddedDevice"/>.</para>
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/// </remarks>
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/// <seealso cref="SsdpRootDevice"/>
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/// <seealso cref="SsdpEmbeddedDevice"/>
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public abstract class SsdpDevice
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{
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private string _Udn;
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private string _DeviceType;
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private string _DeviceTypeNamespace;
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private int _DeviceVersion;
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private IList<SsdpDevice> _Devices;
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/// <summary>
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/// Raised when a new child device is added.
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/// </summary>
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/// <seealso cref="AddDevice"/>
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/// <seealso cref="DeviceAdded"/>
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public event EventHandler<DeviceEventArgs> DeviceAdded;
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/// <summary>
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/// Raised when a child device is removed.
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/// </summary>
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/// <seealso cref="RemoveDevice"/>
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/// <seealso cref="DeviceRemoved"/>
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public event EventHandler<DeviceEventArgs> DeviceRemoved;
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/// <summary>
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/// Derived type constructor, allows constructing a device with no parent. Should only be used from derived types that are or inherit from <see cref="SsdpRootDevice"/>.
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/// </summary>
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protected SsdpDevice()
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{
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_DeviceTypeNamespace = SsdpConstants.UpnpDeviceTypeNamespace;
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_DeviceType = SsdpConstants.UpnpDeviceTypeBasicDevice;
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_DeviceVersion = 1;
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_Devices = new List<SsdpDevice>();
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this.Devices = new ReadOnlyCollection<SsdpDevice>(_Devices);
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}
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public SsdpRootDevice ToRootDevice()
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{
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var device = this;
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var rootDevice = device as SsdpRootDevice;
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if (rootDevice == null)
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{
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rootDevice = ((SsdpEmbeddedDevice)device).RootDevice;
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}
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return rootDevice;
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}
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/// <summary>
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/// Sets or returns the core device type (not including namespace, version etc.). Required.
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/// </summary>
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/// <remarks><para>Defaults to the UPnP basic device type.</para></remarks>
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/// <seealso cref="DeviceTypeNamespace"/>
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/// <seealso cref="DeviceVersion"/>
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/// <seealso cref="FullDeviceType"/>
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public string DeviceType
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{
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get
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{
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return _DeviceType;
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}
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set
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{
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_DeviceType = value;
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}
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}
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public string DeviceClass { get; set; }
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/// <summary>
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/// Sets or returns the namespace for the <see cref="DeviceType"/> of this device. Optional, but defaults to UPnP schema so should be changed if <see cref="DeviceType"/> is not a UPnP device type.
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/// </summary>
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/// <remarks><para>Defaults to the UPnP standard namespace.</para></remarks>
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/// <seealso cref="DeviceType"/>
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/// <seealso cref="DeviceVersion"/>
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/// <seealso cref="FullDeviceType"/>
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public string DeviceTypeNamespace
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{
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get
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{
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return _DeviceTypeNamespace;
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}
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set
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{
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_DeviceTypeNamespace = value;
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}
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}
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/// <summary>
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/// Sets or returns the version of the device type. Optional, defaults to 1.
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/// </summary>
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/// <remarks><para>Defaults to a value of 1.</para></remarks>
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/// <seealso cref="DeviceType"/>
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/// <seealso cref="DeviceTypeNamespace"/>
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/// <seealso cref="FullDeviceType"/>
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public int DeviceVersion
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{
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get
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{
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return _DeviceVersion;
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}
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set
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{
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_DeviceVersion = value;
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}
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}
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/// <summary>
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/// Returns the full device type string.
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/// </summary>
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/// <remarks>
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/// <para>The format used is urn:<see cref="DeviceTypeNamespace"/>:device:<see cref="DeviceType"/>:<see cref="DeviceVersion"/></para>
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/// </remarks>
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public string FullDeviceType
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{
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get
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{
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return String.Format("urn:{0}:{3}:{1}:{2}",
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this.DeviceTypeNamespace ?? String.Empty,
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this.DeviceType ?? String.Empty,
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this.DeviceVersion,
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this.DeviceClass ?? "device");
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}
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}
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/// <summary>
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/// Sets or returns the universally unique identifier for this device (without the uuid: prefix). Required.
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/// </summary>
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/// <remarks>
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/// <para>Must be the same over time for a specific device instance (i.e. must survive reboots).</para>
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/// <para>For UPnP 1.0 this can be any unique string. For UPnP 1.1 this should be a 128 bit number formatted in a specific way, preferably generated using the time and MAC based algorithm. See section 1.1.4 of http://upnp.org/specs/arch/UPnP-arch-DeviceArchitecture-v1.1.pdf for details.</para>
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/// <para>Technically this library implements UPnP 1.0, so any value is allowed, but we advise using UPnP 1.1 compatible values for good behaviour and forward compatibility with future versions.</para>
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/// </remarks>
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public string Uuid { get; set; }
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/// <summary>
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/// Returns (or sets*) a unique device name for this device. Optional, not recommended to be explicitly set.
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/// </summary>
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/// <remarks>
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/// <para>* In general you should not explicitly set this property. If it is not set (or set to null/empty string) the property will return a UDN value that is correct as per the UPnP specification, based on the other device properties.</para>
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/// <para>The setter is provided to allow for devices that do not correctly follow the specification (when we discover them), rather than to intentionally deviate from the specification.</para>
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/// <para>If a value is explicitly set, it is used verbatim, and so any prefix (such as uuid:) must be provided in the value.</para>
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/// </remarks>
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public string Udn
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{
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get
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{
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if (String.IsNullOrEmpty(_Udn) && !String.IsNullOrEmpty(this.Uuid))
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{
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return "uuid:" + this.Uuid;
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}
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else
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{
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return _Udn;
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}
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}
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set
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{
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_Udn = value;
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}
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}
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/// <summary>
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/// Sets or returns a friendly/display name for this device on the network. Something the user can identify the device/instance by, i.e Lounge Main Light. Required.
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/// </summary>
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/// <remarks><para>A short description for the end user. </para></remarks>
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public string FriendlyName { get; set; }
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/// <summary>
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/// Sets or returns the name of the manufacturer of this device. Required.
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/// </summary>
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public string Manufacturer { get; set; }
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/// <summary>
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/// Sets or returns a URL to the manufacturers web site. Optional.
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/// </summary>
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public Uri ManufacturerUrl { get; set; }
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/// <summary>
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/// Sets or returns a description of this device model. Recommended.
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/// </summary>
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/// <remarks><para>A long description for the end user.</para></remarks>
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public string ModelDescription { get; set; }
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/// <summary>
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/// Sets or returns the name of this model. Required.
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/// </summary>
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public string ModelName { get; set; }
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/// <summary>
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/// Sets or returns the number of this model. Recommended.
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/// </summary>
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public string ModelNumber { get; set; }
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/// <summary>
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/// Sets or returns a URL to a web page with details of this device model. Optional.
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/// </summary>
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/// <remarks>
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/// <para>Optional. May be relative to base URL.</para>
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/// </remarks>
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public Uri ModelUrl { get; set; }
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/// <summary>
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/// Sets or returns the serial number for this device. Recommended.
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/// </summary>
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public string SerialNumber { get; set; }
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/// <summary>
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/// Sets or returns the universal product code of the device, if any. Optional.
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/// </summary>
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/// <remarks>
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/// <para>If not blank, must be exactly 12 numeric digits.</para>
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/// </remarks>
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public string Upc { get; set; }
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/// <summary>
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/// Sets or returns the URL to a web page that can be used to configure/manager/use the device. Recommended.
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/// </summary>
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/// <remarks>
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/// <para>May be relative to base URL. </para>
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/// </remarks>
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public Uri PresentationUrl { get; set; }
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/// <summary>
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/// Returns a read-only enumerable set of <see cref="SsdpDevice"/> objects representing children of this device. Child devices are optional.
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/// </summary>
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/// <seealso cref="AddDevice"/>
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/// <seealso cref="RemoveDevice"/>
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public IList<SsdpDevice> Devices
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{
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get;
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private set;
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}
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/// <summary>
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/// Adds a child device to the <see cref="Devices"/> collection.
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/// </summary>
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/// <param name="device">The <see cref="SsdpEmbeddedDevice"/> instance to add.</param>
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/// <remarks>
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/// <para>If the device is already a member of the <see cref="Devices"/> collection, this method does nothing.</para>
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/// <para>Also sets the <see cref="SsdpEmbeddedDevice.RootDevice"/> property of the added device and all descendant devices to the relevant <see cref="SsdpRootDevice"/> instance.</para>
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/// </remarks>
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/// <exception cref="ArgumentNullException">Thrown if the <paramref name="device"/> argument is null.</exception>
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/// <exception cref="InvalidOperationException">Thrown if the <paramref name="device"/> is already associated with a different <see cref="SsdpRootDevice"/> instance than used in this tree. Can occur if you try to add the same device instance to more than one tree. Also thrown if you try to add a device to itself.</exception>
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/// <seealso cref="DeviceAdded"/>
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public void AddDevice(SsdpEmbeddedDevice device)
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{
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if (device == null)
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{
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throw new ArgumentNullException(nameof(device));
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}
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if (device.RootDevice != null && device.RootDevice != this.ToRootDevice())
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{
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throw new InvalidOperationException("This device is already associated with a different root device (has been added as a child in another branch).");
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}
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if (device == this)
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{
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throw new InvalidOperationException("Can't add device to itself.");
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}
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bool wasAdded = false;
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lock (_Devices)
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{
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device.RootDevice = this.ToRootDevice();
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_Devices.Add(device);
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wasAdded = true;
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}
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if (wasAdded)
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{
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OnDeviceAdded(device);
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}
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}
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/// <summary>
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/// Removes a child device from the <see cref="Devices"/> collection.
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/// </summary>
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/// <param name="device">The <see cref="SsdpEmbeddedDevice"/> instance to remove.</param>
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/// <remarks>
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/// <para>If the device is not a member of the <see cref="Devices"/> collection, this method does nothing.</para>
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/// <para>Also sets the <see cref="SsdpEmbeddedDevice.RootDevice"/> property to null for the removed device and all descendant devices.</para>
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/// </remarks>
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/// <exception cref="ArgumentNullException">Thrown if the <paramref name="device"/> argument is null.</exception>
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/// <seealso cref="DeviceRemoved"/>
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public void RemoveDevice(SsdpEmbeddedDevice device)
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{
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if (device == null)
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{
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throw new ArgumentNullException(nameof(device));
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}
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bool wasRemoved = false;
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lock (_Devices)
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{
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wasRemoved = _Devices.Remove(device);
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if (wasRemoved)
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{
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device.RootDevice = null;
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}
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}
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if (wasRemoved)
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{
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OnDeviceRemoved(device);
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}
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}
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/// <summary>
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/// Raises the <see cref="DeviceAdded"/> event.
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/// </summary>
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/// <param name="device">The <see cref="SsdpEmbeddedDevice"/> instance added to the <see cref="Devices"/> collection.</param>
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/// <seealso cref="AddDevice"/>
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/// <seealso cref="DeviceAdded"/>
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protected virtual void OnDeviceAdded(SsdpEmbeddedDevice device)
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{
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var handlers = this.DeviceAdded;
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if (handlers != null)
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{
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handlers(this, new DeviceEventArgs(device));
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}
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}
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/// <summary>
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/// Raises the <see cref="DeviceRemoved"/> event.
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/// </summary>
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/// <param name="device">The <see cref="SsdpEmbeddedDevice"/> instance removed from the <see cref="Devices"/> collection.</param>
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/// <seealso cref="RemoveDevice"/>
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/// <see cref="DeviceRemoved"/>
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protected virtual void OnDeviceRemoved(SsdpEmbeddedDevice device)
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{
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var handlers = this.DeviceRemoved;
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if (handlers != null)
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{
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handlers(this, new DeviceEventArgs(device));
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}
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}
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}
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}
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