public static string GetInitialStates(IVMFactory vmFactory, ref string path, Type entryVMType)
{
string result = null;
try
{
using (var vmController = new VMController((arg1, arg2, arg3) => Task.CompletedTask, vmFactory))
{
// Traverse the routing path to get initial states of all the view models involved.
var vmStates = new List <string>();
if (!Path.HasExtension(path))
{
var viewData = new RoutingViewData(path, null, entryVMType);
RoutableExtension.Route(ref viewData, out object vm);
while (vm != null)
{
object vmArgs = null;
if (vm is IRoutable routable)
{
// If at the end of the path and the view model has a default route template (blank url pattern),
// append a slash to the path to ensure it's correctly routed.
if (path.Trim('/').Length > 0 && string.Compare(viewData.UrlPath, viewData.Root, true) == 0 && routable.RoutingState.Templates.Any(i => i.UrlPattern == ""))
{
path += "/";
}
// Determine the "RoutingState.Origin" property value and pass it as argument to the view model
// associated with the current path to set its initial state correctly.
string args = routable.InitArgs(viewData);
Match match = Regex.Match(args, "'RoutingState.Origin':\\s*'(.*?)'");
if (match.Success)
{
vmArgs = JsonConvert.DeserializeObject($"{{{match.Value}}}");
}
}
string vmName = vm.GetType().Name;
vmStates.Add($"\"{vmName}\":{vmController.GetInitialState(vmName, vmArgs)}");
// Traverse the next path.
RoutableExtension.Route(ref viewData, out vm);
}
result = $"{{{string.Join(",", vmStates)}}}";
}
return(result);
}
}
catch (Exception ex)
{
Logger.LogError($"Failed to get SSR initial states: {ex.Message}");
return(null);
}
}
public static string GetInitialStates(ref string path, Type entryVMType)
{
try
{
// Traverse the routing path to get initial states of all the view models involved.
var vmStates = new List <string>();
if (path.Trim('/').Length > 0)
{
var viewData = new RoutingViewData(path, null, entryVMType);
RoutableExtension.Route(ref viewData, out IRoutable vm);
while (vm != null)
{
// If at the end of the path and the view model has a default route template (blank url pattern),
// append a slash to the path to ensure it's correctly routed.
if (string.Compare(viewData.UrlPath, viewData.Root, true) == 0 && vm.RoutingState.Templates.Any(i => i.UrlPattern == ""))
{
path += "/";
}
// Determine the "RoutingState.Origin" property value and pass it as argument to the view model
// associated with the current path to set its initial state correctly.
object vmArgs = null;
var args = vm.InitArgs(viewData);
var match = Regex.Match(args, "'RoutingState.Origin':\\s*'(.*?)'");
if (match.Success)
{
vmArgs = JsonConvert.DeserializeObject($"{{{match.Value}}}");
}
var vmName = vm.GetType().Name;
vmStates.Add($"\"{vmName}\":{VMController.GetInitialState(vmName, vmArgs)}");
// Traverse the next path.
RoutableExtension.Route(ref viewData, out vm);
}
}
return($"{{{string.Join(",", vmStates)}}}");
}
catch (Exception ex)
{
System.Diagnostics.Trace.Fail(ex.ToString());
return(null);
}
}
private string BuildStateString(string vm) => $"window.vmStates = window.vmStates || {{}}; window.vmStates['{vm}'] = {VMController.GetInitialState(vm) ?? "{}"};";
private string GetInitialState(string vm) => vm == null ? null : $@"
window.vmStates = window.vmStates || {{}};
window.vmStates['{vm}'] = {VMController.GetInitialState(vm) ?? "{}"};";