public void Compare(UpnpDevice to, UpnpDevice from)
{
if(from == null)
return;
var fromChildren = from.EnumerateDevices().ToList();
var toChildren = to.EnumerateDevices().ToList();
foreach (var toChild in toChildren)
{
var fromChild = FindMatchFor(toChild, fromChildren);
if (fromChild == null)
{
//fromChild doesnt exist so was removed
DeviceRemoved(toChild);
continue;
}
// remove the child so we can see if there are any new ones at the end.
fromChildren.Remove(fromChild);
CompareDevices(toChild, fromChild);
}
//these devices were not found in the 'to' device so they are new
if (fromChildren.Count > 0)
ProcessAddedDevices(to, fromChildren);
}
protected virtual void CompareDevices(UpnpDevice to, UpnpDevice from)
{
var fromServices = from.Services.ToList();
var toServices = to.Services.ToList();
foreach (var toService in toServices)
{
var fromService = FindMatchFor(toService, fromServices);
if (fromService == null)
{
ServiceRemoved(to, toService);
continue;
}
fromServices.Remove(fromService);
CompareService(toService, fromService);
}
if(fromServices.Count > 0)
ServicesAdded(to, fromServices);
}
protected virtual void CompareDevices(UpnpDevice to, UpnpDevice from)
{
var fromServices = from.Services.ToList();
var toServices = to.Services.ToList();
foreach (var toService in toServices)
{
var fromService = FindMatchFor(toService, fromServices);
if (fromService == null)
{
ServiceRemoved(to, toService);
continue;
}
fromServices.Remove(fromService);
CompareService(toService, fromService);
}
if (fromServices.Count > 0)
{
ServicesAdded(to, fromServices);
}
}
private void ProcessAddedDevices(UpnpDevice to, List <UpnpDevice> addedDevices)
{
var toChildren = to.EnumerateDevices().ToList();
foreach (var device in addedDevices)
{
//cant update root device
if (device.Parent == null)
{
continue;
}
//find the original 'to' parent
var toChild = FindMatchFor(device.Parent, toChildren);
if (toChild == null)
{
continue;
}
DeviceAdded(toChild, device);
}
}
protected virtual void DeviceRemoved(UpnpDevice device)
{
}
public static IEnumerable <UpnpDevice> FindByUdn(this UpnpDevice device, string udn)
{
return(device.EnumerateDevices().Where(d => d.UDN == udn));
}
protected virtual void DeviceAdded(UpnpDevice parent, UpnpDevice device)
{
}
protected internal void OnChildDeviceRemoved(UpnpDevice child)
{
var handler = ChildDeviceRemoved;
if (handler != null)
handler(this, new EventArgs<UpnpDevice>(child));
}
public static IEnumerable <UpnpService> EnumerateServices(this UpnpDevice @this)
{
return(@this.EnumerateDevices().SelectMany(device => device.Services));
}
private void SetupOnRemovedHandler(UpnpDevice device, ISsdpAnnouncer ad1, ISsdpAnnouncer ad2)
{
EventHandler<EventArgs<UpnpDevice>> onRemoved = null;
onRemoved = (sender, args) =>
{
ad1.Shutdown();
ad2.Shutdown();
this.SsdpServer.RemoveAnnouncer(ad1);
this.SsdpServer.RemoveAnnouncer(ad2);
device.Removed -= onRemoved;
};
device.Removed += onRemoved;
}
public static IEnumerable <UpnpDevice> EnumerateDevices(this UpnpDevice @this)
{
return(new[] { @this }.Concat(@this.Devices.SelectMany(d => d.EnumerateDevices())));
}
protected virtual UpnpDevice FindMatchFor(UpnpDevice device, IEnumerable<UpnpDevice> fromChildren)
{
return fromChildren.FirstOrDefault(child => device.Type == child.Type);
}
protected virtual void ServicesAdded(UpnpDevice device, List<UpnpService> services)
{
}
protected virtual UpnpDevice FindMatchFor(UpnpDevice device, IEnumerable <UpnpDevice> fromChildren)
{
return(fromChildren.FirstOrDefault(child => device.Type == child.Type));
}
protected virtual void DeviceRemoved(UpnpDevice device)
{
}
protected virtual void ServiceRemoved(UpnpDevice device, UpnpService service)
{
}
public static IEnumerable <UpnpService> FindByServiceType(this UpnpDevice device, UpnpType type)
{
return(device.EnumerateServices().Where(service => service.Type.Equals(type)));
}
public static IEnumerable <UpnpService> FindByServiceId(this UpnpDevice device, string id)
{
return(device.EnumerateServices().Where(s => s.Id == id));
}
protected virtual void ServiceRemoved(UpnpDevice device, UpnpService service)
{
}
protected virtual void DeviceAdded(UpnpDevice parent, UpnpDevice device)
{
}
private void ProcessAddedDevices(UpnpDevice to, List<UpnpDevice> addedDevices)
{
var toChildren = to.EnumerateDevices().ToList();
foreach (var device in addedDevices)
{
//cant update root device
if(device.Parent == null)
continue;
//find the original 'to' parent
var toChild = FindMatchFor(device.Parent, toChildren);
if(toChild == null)
continue;
DeviceAdded(toChild, device);
}
}
protected virtual void ServicesAdded(UpnpDevice device, List <UpnpService> services)
{
}
private void BuildAdvertisementsForDevice(UpnpDevice device)
{
var notificationType = device.UDN;
var type = device.Type.ToString();
var ad1 = CreateAdvertisement(notificationType, notificationType);
var ad2 = CreateAdvertisement(type, string.Format("{0}::{1}", device.UDN, type));
SetupOnRemovedHandler(device, ad1, ad2);
foreach (var service in device.Services)
BuildAdvertisementForService(service);
foreach (var child in device.Devices)
BuildAdvertisementsForDevice(child);
}
public static IEnumerable <UpnpDevice> FindByDeviceType(this UpnpDevice @this, UpnpType type)
{
return(@this.EnumerateDevices().Where(d => d.Type.Equals(type)));
}