/// <summary>
/// Handles view model update from a browser client.
/// </summary>
/// <param name="connectionId">Identifies the client connection.</param>
/// <param name="vmId">Identifies the view model.</param>
/// <param name="iData">View model update.</param>
public virtual void OnUpdateVM(string connectionId, string vmId, Dictionary <string, object> data)
{
bool isRecreated = false;
if (!_activeVMs.ContainsKey(vmId))
{
// No view model found; it must have expired and needs to be recreated.
isRecreated = true;
OnRequestVM(connectionId, vmId);
if (!_activeVMs.ContainsKey(vmId))
{
return;
}
}
// Update the new values from the client to the server view model.
var vmInstance = _activeVMs[vmId].Instance;
// Invoke the interception delegate.
UpdateVMFilter.Invoke(vmId, vmInstance, data, filteredData =>
{
lock (vmInstance)
{
foreach (var kvp in filteredData as Dictionary <string, object> )
{
UpdateVM(vmInstance, kvp.Key, kvp.Value != null ? kvp.Value.ToString() : "");
}
}
// If the updates cause some properties of this and other view models to change, push those new values back to the client.
// For multicast view models, use their PushUpdates method to push to any other connected clients.
if (vmInstance is MulticastVM)
{
vmInstance.PushUpdates();
}
else
{
// Unless the view model was recreated, exclude the changes that trigger this update if their values don't change.
if (!isRecreated)
{
foreach (var kvp in data)
{
if (vmInstance.IsEqualToChangedPropertyValue(kvp.Key, kvp.Value))
{
vmInstance.ChangedProperties.TryRemove(kvp.Key, out object dummy);
}
}
}
PushUpdates();
}
});
}
/// <summary>
/// Handles view model update from a browser client.
/// </summary>
/// <param name="connectionId">Identifies the client connection.</param>
/// <param name="vmId">Identifies the view model.</param>
/// <param name="iData">View model update.</param>
public virtual void OnUpdateVM(string connectionId, string vmId, Dictionary <string, object> data)
{
bool isRecreated = false;
if (!_activeVMs.ContainsKey(vmId))
{
// No view model found; it must have expired and needs to be recreated.
isRecreated = true;
OnRequestVM(connectionId, vmId);
if (!_activeVMs.ContainsKey(vmId))
{
return;
}
}
// Update the new values from the client to the server view model.
var vmInstance = _activeVMs[vmId].Instance;
// Invoke the interception delegate.
UpdateVMFilter.Invoke(vmId, vmInstance, data, filteredData =>
{
lock (vmInstance)
{
foreach (var kvp in filteredData as Dictionary <string, object> )
{
UpdateVM(vmInstance, kvp.Key, kvp.Value != null ? kvp.Value.ToString() : "");
// If the view model was recreated, include the changes that trigger this update to overwrite their initial values.
if (isRecreated && !vmInstance.ChangedProperties.ContainsKey(kvp.Key))
{
vmInstance.ChangedProperties.TryAdd(kvp.Key, kvp.Value);
}
}
}
// If the updates cause some properties of this and other view models to change, push those new values back to the client.
PushUpdates();
});
}
/// <summary>
/// Handles view model update from a browser client.
/// </summary>
/// <param name="connectionId">Identifies the client connection.</param>
/// <param name="vmId">Identifies the view model.</param>
/// <param name="iData">View model update.</param>
public virtual void OnUpdateVM(string connectionId, string vmId, Dictionary <string, object> data)
{
bool isRecreated = false;
if (!_activeVMs.ContainsKey(vmId))
{
// No view model found; it must have expired and needs to be recreated.
isRecreated = true;
OnRequestVM(connectionId, vmId);
if (!_activeVMs.ContainsKey(vmId))
{
return;
}
}
// Update the new values from the client to the server view model.
var vmInstance = _activeVMs[vmId].Instance;
// Invoke the interception delegate.
UpdateVMFilter.Invoke(vmId, vmInstance, data, filteredData =>
{
lock (vmInstance)
{
foreach (var kvp in filteredData as Dictionary <string, object> )
{
UpdateVM(vmInstance, kvp.Key, kvp.Value != null ? kvp.Value.ToString() : "");
}
}
// If the updates cause some properties of this and other view models to change, push those new values back to the client.
lock (vmInstance)
{
var vmInfo = _activeVMs.Values.FirstOrDefault(vm => vm.Instance == vmInstance);
var changedProperties = new Dictionary <string, object>(vmInstance.ChangedProperties);
// Unless the view model was recreated, exclude the changes that trigger this update if their values don't change.
if (!isRecreated)
{
foreach (var kvp in data)
{
if (vmInstance.IsEqualToChangedPropertyValue(kvp.Key, kvp.Value))
{
changedProperties.Remove(kvp.Key);
}
}
}
if (changedProperties.Count > 0)
{
var vmData = vmInstance.Serialize(changedProperties);
PushUpdates(vmInfo, vmData);
}
if (vmInstance is MulticastVM)
{
(vmInstance as MulticastVM).PushUpdatesExcept(vmInfo.ConnectionId);
}
else
{
vmInstance.AcceptChangedProperties();
}
}
// Push updates on other view model instances in case they too change.
foreach (var vmInfo in _activeVMs.Values.Where(vm => vm.Instance != vmInstance))
{
PushUpdates(vmInfo);
}
});
}
/// <summary>
/// Handles view model update from a browser client.
/// </summary>
/// <param name="connectionId">Identifies the client connection.</param>
/// <param name="vmId">Identifies the view model.</param>
/// <param name="iData">View model update.</param>
public async Task OnUpdateVMAsync(string connectionId, string vmId, Dictionary <string, object> data)
{
if (!_activeVMs.ContainsKey(vmId))
{
Logger.LogError($"Update to '{vmId}' received before connect request");
return;
}
// Update the new values from the client to the server view model.
var vmInstance = _activeVMs[vmId].Instance;
// Invoke the interception delegate.
await UpdateVMFilter.Invoke(vmId, vmInstance, data, async filteredData =>
{
List <Task> asyncCommands = null;
lock (vmInstance)
{
foreach (var kvp in filteredData as Dictionary <string, object> )
{
UpdateVM(vmInstance, kvp.Key, kvp.Value != null ? kvp.Value.ToString() : "");
}
if (vmInstance.AsyncCommands.Count > 0)
{
asyncCommands = new List <Task>(vmInstance.AsyncCommands);
vmInstance.AsyncCommands.Clear();
}
}
/// Await for any asynchronous command executed during deserialization.
if (asyncCommands != null)
{
await Task.WhenAll(asyncCommands);
}
// If the updates cause some properties of this and other view models to change, push those new values back to the client.
lock (vmInstance)
{
var vmInfo = _activeVMs.Values.FirstOrDefault(vm => vm.Instance == vmInstance);
if (vmInfo != null)
{
var changedProperties = new Dictionary <string, object>(vmInstance.ChangedProperties);
// Exclude the changes that trigger this update if their values don't change.
foreach (var kvp in data)
{
if (vmInstance.IsEqualToChangedPropertyValue(kvp.Key, kvp.Value))
{
changedProperties.Remove(kvp.Key);
}
}
if (changedProperties.Count > 0)
{
var vmData = vmInstance.Serialize(changedProperties);
PushUpdates(vmInfo, vmData);
}
if (vmInstance is MulticastVM)
{
(vmInstance as MulticastVM).PushUpdatesExcept(vmInfo.ConnectionId);
}
else
{
vmInstance.AcceptChangedProperties();
}
}
}
// Push updates on other view model instances in case they too change.
foreach (var vmInfo in _activeVMs.Values.Where(vm => vm.Instance != vmInstance))
{
PushUpdates(vmInfo);
}
});
}
