public bool AddRSSInfo(RSSViewModel vm)
{
//pubdate format from http://www.dotnetperls.com/pubdate
IFileProvider provider = _appEnvironment.ContentRootFileProvider;
IDirectoryContents contents = provider.GetDirectoryContents("wwwroot\\content");
if (!contents.Any(c => c.Name == "feed.xml"))
{
if (!CreateXMLFile())
{
return(false);
}
}
XDocument xdoc;
DateTime now = DateTime.Now;
if (!XmlFilePopulated())
{
xdoc = new XDocument(
new XElement("rss", new XAttribute("version", "2.0"),
new XElement("channel", new XElement("title", vm.Title),
new XElement("description", vm.Description),
new XElement("link", vm.Link),
new XElement("pubDate", now.ToString("ddd',' d MMM yyyy HH':'mm':'ss") +
" " +
now.ToString("zzzz").Replace(":", "")),
new XElement("lastBuildDate", now.ToString("ddd',' d MMM yyyy HH':'mm':'ss") +
" " +
now.ToString("zzzz").Replace(":", "")),
new XElement("ttl", vm.TimeToLive))));
}
else
{
xdoc = XDocument.Load(contents.Where(c => c.Name == "feed.xml").FirstOrDefault().CreateReadStream());
xdoc.Descendants("title").FirstOrDefault()?.SetValue(vm.Title);
xdoc.Descendants("description").FirstOrDefault()?.SetValue(vm.Description);
xdoc.Descendants("link").FirstOrDefault()?.SetValue(vm.Link);
xdoc.Descendants("lastBuildDate").FirstOrDefault()?.SetValue(now.ToString("ddd',' d MMM yyyy HH':'mm':'ss") +
" " +
now.ToString("zzzz").Replace(":", ""));
xdoc.Descendants("ttl").FirstOrDefault()?.SetValue(vm.TimeToLive);
}
try
{
using (var fileStream = new FileStream(_appEnvironment.ContentRootPath + "\\wwwroot\\content\\feed.xml", FileMode.Create))
{
xdoc.Save(fileStream);
}
}
catch (Exception e)
{
return(false);
}
return(true);
}
public void PopulateRSSInfoViewModel(RSSViewModel vm)
{
IFileProvider provider = _appEnvironment.ContentRootFileProvider;
IDirectoryContents contents = provider.GetDirectoryContents("wwwroot\\content");
if (!contents.Any(c => c.Name == "feed.xml"))
{
CreateXMLFile();
vm.RSSCreated = false;
return;
}
if (!XmlFilePopulated())
{
return;
}
XDocument xdoc = XDocument.Load(contents.Where(c => c.Name == "feed.xml").FirstOrDefault().CreateReadStream());
if (xdoc != null)
{
vm.Title = xdoc.Descendants("title").FirstOrDefault()?.Value;
vm.Description = xdoc.Descendants("description").FirstOrDefault()?.Value;
vm.Link = xdoc.Descendants("link").FirstOrDefault()?.Value;
string pubDate = xdoc.Descendants("pubDate").FirstOrDefault()?.Value;
DateTime pubDateTime;
if (DateTime.TryParse(pubDate, out pubDateTime))
{
vm.PublishedDate = pubDateTime;
}
string updateDate = xdoc.Descendants("lastBuildDate").FirstOrDefault()?.Value;
DateTime updateDateTime;
if (DateTime.TryParse(updateDate, out updateDateTime))
{
vm.UpdatedDate = updateDateTime;
}
int ttl;
if (int.TryParse(xdoc.Descendants("ttl").FirstOrDefault()?.Value, out ttl))
{
vm.TimeToLive = ttl;
}
vm.RSSCreated = true;
}
}
public void PopulateRSSItemsViewModel(RSSItemsViewModel vm)
{
List <RSSItemViewModel> vmList = new List <RSSItemViewModel>();
IFileProvider provider = _appEnvironment.ContentRootFileProvider;
IDirectoryContents contents = provider.GetDirectoryContents("wwwroot\\content");
if (!contents.Any(c => c.Name == "feed.xml"))
{
if (!CreateXMLFile())
{
return;
}
}
if (!XmlFilePopulated())
{
return;
}
XDocument xdoc = XDocument.Load(contents.Where(c => c.Name == "feed.xml").FirstOrDefault().CreateReadStream());
if (xdoc != null)
{
List <XElement> elements = xdoc.Descendants("item").ToList();
foreach (var element in elements)
{
RSSItemViewModel tempVm = new RSSItemViewModel();
tempVm.Title = element.Descendants("title").FirstOrDefault()?.Value;
tempVm.Description = element.Descendants("description").FirstOrDefault()?.Value;
tempVm.Link = element.Descendants("link").FirstOrDefault()?.Value;
string pubDate = element.Descendants("pubDate").FirstOrDefault()?.Value;
DateTime pubDateTime;
if (DateTime.TryParse(pubDate, out pubDateTime))
{
tempVm.PublishedDate = pubDateTime;
}
tempVm.GUID = element.Descendants("guid").FirstOrDefault()?.Value;
vmList.Add(tempVm);
}
}
vm.RSSItems = vmList;
}
public void PopulateEditRSSItemViewModel(EditRSSItemViewModel vm, string id)
{
RSSItemViewModel itemVm = new RSSItemViewModel();
if (string.IsNullOrEmpty(id))
{
return;
}
IFileProvider provider = _appEnvironment.ContentRootFileProvider;
IDirectoryContents contents = provider.GetDirectoryContents("wwwroot\\content");
if (!contents.Any(c => c.Name == "feed.xml"))
{
if (!CreateXMLFile())
{
return;
}
}
if (!XmlFilePopulated())
{
return;
}
XDocument xdoc = XDocument.Load(contents.Where(c => c.Name == "feed.xml").FirstOrDefault().CreateReadStream());
if (xdoc != null)
{
var eleList = xdoc.Descendants("item").ToList();
var item = eleList.Where(c => c.Element("guid").Value == id).FirstOrDefault();
if (item != null)
{
itemVm.Title = item.Descendants("title").FirstOrDefault()?.Value;
itemVm.Description = item.Descendants("description").FirstOrDefault()?.Value;
itemVm.Link = item.Descendants("link").FirstOrDefault()?.Value;
itemVm.GUID = item.Descendants("guid").FirstOrDefault()?.Value;
}
}
vm.RSSItem = itemVm;
}
private bool ModifyRSSItem(ModifyType type, RSSItemViewModel vm, string id)
{
IFileProvider provider = _appEnvironment.ContentRootFileProvider;
IDirectoryContents contents = provider.GetDirectoryContents("wwwroot\\content");
if (!contents.Any(c => c.Name == "feed.xml"))
{
if (!CreateXMLFile())
{
return(false);
}
}
if (!XmlFilePopulated())
{
return(false);
}
XDocument xdoc = XDocument.Load(contents.Where(c => c.Name == "feed.xml").FirstOrDefault().CreateReadStream());
var eleList = xdoc.Descendants("item").ToList();
var ttlEle = xdoc.Descendants("ttl").LastOrDefault();
if (ttlEle == null)
{
return(false);
}
DateTime now = DateTime.Now;
if (type == ModifyType.Create)
{
if (eleList.Count() == 0)
{
//No RSS Items found.
xdoc.Descendants("ttl").LastOrDefault()?.AddAfterSelf(new XElement("item", new XElement("title", vm.Title),
new XElement("description", vm.Description),
new XElement("link", vm.Link),
new XElement("guid", new XAttribute("isPermaLink", "true"), Guid.NewGuid().ToString()),
new XElement("pubDate", now.ToString("ddd',' d MMM yyyy HH':'mm':'ss") +
" " +
now.ToString("zzzz").Replace(":", ""))));
}
else
{
xdoc.Descendants("item").LastOrDefault()?.AddAfterSelf(new XElement("item", new XElement("title", vm.Title),
new XElement("description", vm.Description),
new XElement("link", vm.Link),
new XElement("guid", new XAttribute("isPermaLink", "true"), Guid.NewGuid().ToString()),
new XElement("pubDate", now.ToString("ddd',' d MMM yyyy HH':'mm':'ss") +
" " +
now.ToString("zzzz").Replace(":", ""))));
}
}
else if (type == ModifyType.Edit)
{
var item = eleList.Where(c => c.Element("guid").Value == id).FirstOrDefault();
if (item != null)
{
item.Descendants("title").FirstOrDefault()?.SetValue(vm.Title);
item.Descendants("description").FirstOrDefault()?.SetValue(vm.Description);
item.Descendants("link").FirstOrDefault()?.SetValue(vm.Link);
}
}
else if (type == ModifyType.Delete)
{
var item = eleList.Where(c => c.Element("guid").Value == id).FirstOrDefault();
if (item != null)
{
item.Remove();
}
}
try
{
using (var fileStream = new FileStream(_appEnvironment.ContentRootPath + "\\wwwroot\\content\\feed.xml", FileMode.Create))
{
xdoc.Save(fileStream);
return(true);
}
}
catch (Exception e)
{
return(false);
}
}