/// <summary>
/// Handles a request for a view model from a browser client.
/// </summary>
/// <param name="connectionId">Identifies the client connection.</param>
/// <param name="vmId">Identifies the view model.</param>
/// <param name="vmArg">Optional view model's initialization argument.</param>
public virtual void OnRequestVM(string connectionId, string vmId, object vmArg = null)
{
// Create a new view model instance whose class name is matching the given VMId.
BaseVM vmInstance = !_activeVMs.ContainsKey(vmId) ? CreateVM(vmId, vmArg) : _activeVMs[vmId].Instance;
RequestVMFilter.Invoke(vmId, vmInstance, vmArg, data =>
{
var vmData = Serialize(vmInstance);
// Send the view model data back to the browser client.
_vmResponse?.Invoke(connectionId, vmId, vmData);
// Reset the changed property states.
vmInstance.AcceptChangedProperties();
// Add the view model instance to the controller.
if (!_activeVMs.ContainsKey(vmId))
{
_activeVMs.TryAdd(vmId, new VMInfo {
Instance = vmInstance, ConnectionId = connectionId
});
vmInstance.RequestPushUpdates += VmInstance_RequestPushUpdates;
}
else
{
_activeVMs[vmId].ConnectionId = connectionId;
}
// If this request causes other view models to change, push those new values back to the client.
PushUpdates();
});
}
/// <summary>
/// Handles a request for a view model from a browser client.
/// </summary>
/// <param name="connectionId">Identifies the client connection.</param>
/// <param name="vmId">Identifies the view model.</param>
/// <param name="vmArg">Optional view model's initialization argument.</param>
/// <returns>Group name, if the request is for a multicast view model associated with one.</returns>
public async virtual Task <string> OnRequestVMAsync(string connectionId, string vmId, object vmArg = null)
{
BaseVM vmInstance = null;
if (_activeVMs.ContainsKey(vmId))
{
vmInstance = _activeVMs[vmId].Instance;
}
else
{
// Create a new view model instance whose class name is matching the given VMId.
vmInstance = CreateVM(vmId, vmArg);
await vmInstance.OnCreatedAsync();
}
await RequestVMFilter.Invoke(vmId, vmInstance, vmArg, async data =>
{
var vmData = vmInstance.Serialize();
// Send the view model data back to the browser client.
await ResponseVMFilter.Invoke(vmId, vmInstance, vmData, filteredData => _vmResponse(connectionId, vmId, (string)filteredData));
// Reset the changed property states.
vmInstance.AcceptChangedProperties();
// Add the view model instance to the controller.
if (!_activeVMs.ContainsKey(vmId))
{
var vmInfo = new VMInfo(id: vmId, instance: vmInstance, connectionId: connectionId);
vmInstance.RequestPushUpdates += VmInstance_RequestPushUpdates;
if (vmInstance is MulticastVM)
{
var multicastVM = vmInstance as MulticastVM;
vmInfo.GroupName = multicastVM.GroupName;
multicastVM.RequestMulticastPushUpdates += VMInstance_RequestMulticastPushUpdates;
multicastVM.RequestSend += VMInstance_RequestSend;
}
_activeVMs.TryAdd(vmId, vmInfo);
}
else
{
_activeVMs[vmId].ConnectionId = connectionId;
}
// If this request causes other view models to change, push those new values back to the client.
foreach (var vmInfo in _activeVMs.Values)
{
PushUpdates(vmInfo);
}
});
return(_activeVMs[vmId].GroupName);
}
/// <summary>
/// Handles a request for a view model from a browser client.
/// </summary>
/// <param name="connectionId">Identifies the client connection.</param>
/// <param name="vmId">Identifies the view model.</param>
/// <param name="vmArg">Optional view model's initialization argument.</param>
/// <returns>Group name, if the request is for a multicast view model associated with one.</returns>
public virtual string OnRequestVM(string connectionId, string vmId, object vmArg = null)
{
// Create a new view model instance whose class name is matching the given VMId.
BaseVM vmInstance = !_activeVMs.ContainsKey(vmId) ? CreateVM(vmId, vmArg) : _activeVMs[vmId].Instance;
RequestVMFilter.Invoke(vmId, vmInstance, vmArg, data =>
{
var vmData = vmInstance.Serialize();
// Send the view model data back to the browser client.
_vmResponse?.Invoke(connectionId, vmId, vmData);
// Reset the changed property states.
vmInstance.AcceptChangedProperties();
// Add the view model instance to the controller.
if (!_activeVMs.ContainsKey(vmId))
{
_activeVMs.TryAdd(vmId, new VMInfo(id: vmId, instance: vmInstance, connectionId: connectionId));
vmInstance.RequestPushUpdates += VmInstance_RequestPushUpdates;
if (vmInstance is IMulticast)
{
(vmInstance as IMulticast).RequestMulticastPushUpdates += VMInstance_RequestMulticastPushUpdates;
}
}
else
{
_activeVMs[vmId].ConnectionId = connectionId;
}
// If this request causes other view models to change, push those new values back to the client.
foreach (var vmInfo in _activeVMs.Values)
{
PushUpdates(vmInfo);
}
});
return(vmInstance is IMulticast ? (vmInstance as IMulticast).GroupName : null);
}
