public Task BindModelAsync(ModelBindingContext bindingContext)
{
bindingContext.ThrowIfNull(nameof(bindingContext));
ISitemapItem model = null;
//navType & navLevels are set on the 'RouteData' Metadata field on the component template.
//and passed as routeparameters to the action.
string navType = null;
int navLevels = 0;
int navStartLevel = -1;
ValueProviderResult value = bindingContext.ValueProvider.GetValue("navType");
ValueProviderResult navLevelsResult = bindingContext.ValueProvider.GetValue("navLevels");
ValueProviderResult navStartLevelResult = bindingContext.ValueProvider.GetValue("navStartLevel");
if (value.Any())
{
navType = value.FirstValue;
}
string requestUrlPath = bindingContext.HttpContext.Request.Path.Value;
////Filename should be removed. the data published from Tridion doesnt include the filename into the url's
////i.e. for url '/product/index.html' published content from Tridion contains: '/products/'
//var fileName = Path.GetFileName(requestUrlPath);
//if (!fileName.IsNullOrEmpty())
// requestUrlPath = requestUrlPath.Replace(fileName, string.Empty);
if (navLevelsResult.Any())
{
int.TryParse(navLevelsResult.FirstValue, out navLevels);
}
if (navStartLevelResult.Any())
{
int.TryParse(navStartLevelResult.FirstValue, out navStartLevel);
}
//generate a Cache key for the current model.
//try to get model out of HttpContext.Items[], incase the same model is request multiple times during
//a single request.
string key = MODEL_KEY_FORMAT.FormatString(navType, requestUrlPath, navLevels, navStartLevel);
model = bindingContext.HttpContext.Items[key] as ISitemapItem;
if (model == null)
{
switch (navType?.ToLower())
{
case "children":
model = _navigationProvider.GetChildren(requestUrlPath, navLevels, navStartLevel);
break;
case "path":
model = _navigationProvider.GetPath(requestUrlPath);
break;
default:
model = _navigationProvider.GetAll(navLevels);
break;
}
bindingContext.HttpContext.Items[key] = model;
}
//Todo: WTF... this doesn't make sense; Bug in Microsoft.AspNetCore.Mvc???
bindingContext.Result = ModelBindingResult.Success(model);
//Todo: implemenet async
return(Task.FromResult(ModelBindingResult.Success(model)));
}