/// <summary>
/// Populates the view model from the data received from the request.
/// </summary>
/// <returns></returns>
public void PopulateViewModel(RedwoodRequestContext context, RedwoodView view, string serializedPostData)
{
var viewModelConverter = new ViewModelJsonConverter();
// get properties
var data = context.ReceivedViewModelJson = JObject.Parse(serializedPostData);
var viewModelToken = (JObject)data["viewModel"];
// load CSRF token
context.CsrfToken = viewModelToken["$csrfToken"].Value<string>();
if (viewModelToken["$encryptedValues"] != null)
{
// load encrypted values
var encryptedValuesString = viewModelToken["$encryptedValues"].Value<string>();
viewModelConverter.EncryptedValues = JArray.Parse(viewModelProtector.Unprotect(encryptedValuesString, context));
}
else viewModelConverter.EncryptedValues = new JArray();
// get validation path
context.ModelState.ValidationTargetPath = data["validationTargetPath"].Value<string>();
// populate the ViewModel
var serializer = new JsonSerializer();
serializer.Converters.Add(viewModelConverter);
viewModelConverter.Populate(viewModelToken, serializer, context.ViewModel);
// load the control state
var walker = new ViewModelJTokenControlTreeWalker(viewModelToken, view);
walker.ProcessControlTree(walker.LoadControlState);
}
/// <summary>
/// Serializes the validation rules.
/// </summary>
private JObject SerializeValidationRules(ViewModelJsonConverter viewModelConverter)
{
var validationRules = new JObject();
foreach (var map in viewModelConverter.UsedSerializationMaps)
{
var rule = new JObject();
foreach (var property in map.Properties.Where(p => p.ClientValidationRules.Any()))
{
rule[property.Name] = JToken.FromObject(property.ClientValidationRules);
}
if (rule.Count > 0) validationRules[map.Type.ToString()] = rule;
}
return validationRules;
}
/// <summary>
/// Builds the view model for the client.
/// </summary>
public void BuildViewModel(RedwoodRequestContext context, RedwoodView view)
{
// serialize the ViewModel
var serializer = new JsonSerializer();
var viewModelConverter = new ViewModelJsonConverter()
{
EncryptedValues = new JArray(),
UsedSerializationMaps = new HashSet<ViewModelSerializationMap>()
};
serializer.Converters.Add(viewModelConverter);
var writer = new JTokenWriter();
serializer.Serialize(writer, context.ViewModel);
// save the control state
var walker = new ViewModelJTokenControlTreeWalker(writer.Token, view);
walker.ProcessControlTree(walker.SaveControlState);
// persist CSRF token
writer.Token["$csrfToken"] = context.CsrfToken;
// persist encrypted values
if (viewModelConverter.EncryptedValues.Count > 0)
writer.Token["$encryptedValues"] = viewModelProtector.Protect(viewModelConverter.EncryptedValues.ToString(Formatting.None), context);
// serialize validation rules
var validationRules = SerializeValidationRules(viewModelConverter);
// create result object
var result = new JObject();
result["viewModel"] = writer.Token;
result["url"] = context.OwinContext.Request.Uri.PathAndQuery;
result["virtualDirectory"] = RedwoodMiddleware.GetVirtualDirectory(context.OwinContext);
if (context.IsPostBack || context.IsSpaRequest)
{
result["action"] = "successfulCommand";
result["resources"] = BuildResourcesJson(context, _ => true);
}
else
{
result["renderedResources"] = JArray.FromObject(context.ResourceManager.RequiredResources);
}
// TODO: do not send on postbacks
if (validationRules.Count > 0) result["validationRules"] = validationRules;
context.ViewModelJson = result;
}