/// <summary>
/// Render dynamic Navigation
/// </summary>
/// <param name="parameters"></param>
/// <returns></returns>
public override string Render(string[] parameters)
{
//Initialize parameter
ParseParams(parameters);
#region Try get template cache
/*
* Check storing Navigation result in cache
* If all the Navigations are not updated then get the cache result
* If not rebuild the data and recache
*/
var cacheName = string.Join("_", parameters);
var cacheNavigation = StateManager.GetApplication <CacheNavigation>(cacheName);
if (cacheNavigation != null)
{
var template = _widgetTemplateService.GetTemplate(Template) ??
_widgetTemplateService.GetTemplate(GetSetup().DefaultTemplate);
if (template == null)
{
throw new Exception(string.Format("Template {0} is not found", Template));
}
var lastCreated = _clientNavigationService.GetAll().Max(t => t.Created);
var lastUpdated = _clientNavigationService.GetAll().Max(t => t.LastUpdate) ?? DateTime.MinValue;
var dataCacheTime = lastCreated > lastUpdated ? lastCreated : lastUpdated;
lastCreated = template.Created;
lastUpdated = template.LastUpdate ?? DateTime.MinValue;
var templateCacheTime = lastCreated > lastUpdated ? lastCreated : lastUpdated;
if (cacheNavigation.DataCacheTime == dataCacheTime && cacheNavigation.TemplateCacheTime == templateCacheTime)
{
return(cacheNavigation.Content);
}
}
#endregion
var renderTemplate = _widgetTemplateService.GetTemplateByName(Template) ??
_widgetTemplateService.GetTemplateByName(GetSetup().DefaultTemplate);
//Get Navigations
var data = _clientNavigationService.GenerateNavigations(ParentId, ShowParentNavigation);
/*
* Create cache version of this widget and store in Application
*/
cacheNavigation = new CacheNavigation
{
Content = _widgetTemplateService.ParseTemplate(renderTemplate, data),
DataCacheTime = DateTime.UtcNow,
TemplateCacheTime = DateTime.UtcNow
};
HttpContext.Current.Application[cacheName] = cacheNavigation;
return(cacheNavigation.Content);
}