private VEvent ParseVEvent(TokenNode node)
{
var cEvent = new VEvent();
var refDate = DateTime.MinValue;
bool refBool = false;
string refString = "";
if (TryFindDate(node, "DTSTART", ref refDate, out refBool))
{
cEvent.From = refDate;
cEvent.IsFullDayEvent = refBool;
}
if (TryFindDate(node, "DTEND", ref refDate, out refBool))
{
cEvent.To = refDate;
cEvent.IsFullDayEvent = refBool;
}
if ((refString = TryFindString(node, "SUMMARY")) != null)
cEvent.Title = refString;
if ((refString = TryFindString(node, "DESCRIPTION")) != null)
cEvent.Description = refString;
return cEvent;
}
private string TryFindString(TokenNode node, string tokenName)
{
var tokenQuery = node.Tokens.Where(o => o.NamingKey == tokenName).ToArray();
if (tokenQuery.Any())
{
return tokenQuery.First().Value.DecodedValue;
}
return null;
}
public static void UpdateStringToken(TokenNode icalEvent, string tokenName, string value,string subKey = "")
{
var tquery = icalEvent.Tokens.SingleOrDefault(o => o.NamingKey.ToLower() == tokenName.ToLower()) ?? new Token { Key = tokenName };
tquery.SubKey = subKey;
tquery.Value = new EncodedTokenValue {DecodedValue = value};
if (!icalEvent.Tokens.Contains(tquery))
icalEvent.Tokens.Add(tquery);
}
private TokenNode FindNextChild(TokenNode rootNode,int minIndex, string objectName)
{
var calendarQuery = rootNode.Childs.Where(o => o.Name == objectName);
if (calendarQuery.Count() > minIndex)
{
return calendarQuery.Skip(minIndex).Take(1).Single();
}
return null;
}
/// <summary>
/// Schreibt ein TokenNode mit allen TOkens und Unterelementen in einen Writer
/// </summary>
public static void WriteTokenNode(TokenNode tokenNode, TextWriter writer)
{
writer.WriteLine("BEGIN:" + tokenNode.Name);
foreach (var token in tokenNode.Tokens)
WriteToken(token, writer);
foreach (var childNode in tokenNode.Childs)
WriteTokenNode(childNode, writer);
writer.WriteLine("END:" + tokenNode.Name);
}
public static void UpdateDateToken(TokenNode icalEvent, string tokenName, DateTime value, bool isFullDayEvent)
{
if (isFullDayEvent)
UpdateStringToken(icalEvent, tokenName, value.ToString("yyyyMMdd"), "VALUE=DATE-TIME");
else
{
value = value.ToUniversalTime();
UpdateStringToken(icalEvent, tokenName, value.ToString("yyyyMMdd") + "T"
+ value.ToString("HHmmss") + "Z"
, "VALUE=DATE-TIME");
}
}
private bool TryFindDate(TokenNode node, string tokenName, ref DateTime result, out bool isFullDayTime)
{
var tokenQuery = node.Tokens.Where(o => o.NamingKey == tokenName).ToArray();
if (tokenQuery.Any())
{
var dateTime = ParserDateTime.Parse(tokenQuery.First().Value.EncodedValue, out isFullDayTime);
if (dateTime.HasValue)
result = dateTime.Value;
else
return false;
return true;
}
else isFullDayTime = false;
return false;
}
public TokenNode Parse(Stream value)
{
var rootNode = new TokenNode();
var tokenStack = new Stack<TokenNode>();
using (var reader = new StreamReader(value))
{
string line = "";
while ((line = reader.ReadLine()) != null)
{
if (line.StartsWith(" "))
{
tokenStack.Peek().Tokens.Last().Value.EncodedValue += line.Substring(1, line.Length - 1);
continue;
}
var currentToken = new Token();
ParseSingleToken(ref currentToken, line);
switch (currentToken.NamingKey)
{
case TokenBegin:
tokenStack.Push(new TokenNode{ Name = currentToken.Value.EncodedValue});
break;
case TokenEnd:
var endElement = tokenStack.Pop();
if (currentToken.Value.EncodedValue != endElement.Name)
throw new ParsingICalException();
if (tokenStack.Count == 0)
rootNode.Childs.Add(endElement);
else
tokenStack.Peek().Childs.Add(endElement);
break;
default:
tokenStack.Peek().Tokens.Add(currentToken);
break;
}
}
}
return rootNode;
}
/// <summary>
/// Schreibt ein TokenNode mit allen Tokens und Unterelementen in einen Stream
/// </summary>
public static void WriteTokenNode(TokenNode tokenNode, Stream target)
{
TextWriter writer = new StreamWriter(target);
WriteTokenNode(tokenNode, writer);
writer.Flush();
}
