public void doEnd(Token t)
{
StackElem pred = Pop();
if (pred.predFlag)
{
if (Count > 0)
{
accumulator.Add(new Triple(NS(pred.id.TokenText), Peek().guid, pred.guid, true));
}
else
{
throw new Exception("Problem parsing: expecting overriding resource for: " + t.TokenText);
}
}
}
public void doEnd(Token t) { }
public void doBegin(Token t) { }
public void doValueProperty(Token t, Token iprop)
{
if (mComponentToken == null)
return;
switch (mComponentToken.TokenText)
{
case "Vevent":
if (mAccountEvent == null || mIdToken == null || mSchedule == null)
throw new Exception(string.Format(
"Unexpected {0}", t.TokenText));
switch (mIdToken.TokenText)
{
case "dtstart":
mSchedule.StartDateTime = mAccountEvent.StartDateTime = DateTime.Parse(
Token.ParseDateTime(t.TokenText)).Add(-UtcOffset);
mSchedule.EndDateTime = mAccountEvent.EndDateTime = mAccountEvent.StartDateTime.AddHours(1);
break;
case "dtend":
mSchedule.EndDateTime = mAccountEvent.EndDateTime = DateTime.Parse(
Token.ParseDateTime(t.TokenText)).Add(-UtcOffset);
break;
}
break;
}
// Console.WriteLine(mIdToken.TokenText + ": " + t.TokenText);
}
public void doRest(Token t, Token id)
{
if (mComponentToken == null)
return;
switch (mComponentToken.TokenText)
{
case "Vevent":
if (mAccountEvent == null)
throw new Exception(string.Format(
"Unexpected {0}", id.TokenText));
switch (id.TokenText)
{
case "summary":
mAccountEvent.Name = t.TokenText;
break;
case "description":
mAccountEvent.Description = t.TokenText;
break;
case "url":
mAccountEvent.Website = t.TokenText;
break;
}
break;
case "Vvenue":
if (mAccountEvent == null || mPlace == null)
throw new Exception(string.Format(
"Unexpected {0}", id.TokenText));
switch (id.TokenText)
{
case "name":
mPlace.Name = mAccountEvent.PlaceName = t.TokenText;
break;
case "address":
mPlace.Street = t.TokenText;
break;
case "city":
mPlace.City = mAccountEvent.PlaceCity = t.TokenText;
break;
case "region":
mPlace.State = mAccountEvent.PlaceState = t.TokenText;
break;
case "country":
mPlace.Country = mAccountEvent.PlaceCountry = t.TokenText;
break;
case "postalcode":
mPlace.Zip = t.TokenText;
break;
}
break;
}
// Console.WriteLine("\t" + id.TokenText + "=>" + t.TokenText);
}
public void doSymbolic(Token t) { }
public void doURIResource(Token t) { }
public void doURIResource(Token t)
{
StackElem elem = Pop();
accumulator.Add(new Triple(NS(elem.id.TokenText), Peek().guid, NS(t.TokenText), true));
}
public void doMailto(Token t)
{
StackElem elem = Pop();
elem.guid = NewGuid();
accumulator.Add(new Triple(NS(elem.id.TokenText), Peek().guid, elem.guid, true));
accumulator.Add(new Triple(NS("calAddress"), elem.guid, NS(t.TokenText), true));
Push(elem);
}
public void doID(Token t)
{
StackElem elem = new StackElem(t, null, false); // the rest of the methods will fill in this properly
Push(elem);
}
public void doSymbolic(Token t)
{
//TODO: url encoding
StackElem elem = Pop();
accumulator.Add(new Triple(NS(elem.id.TokenText), Peek().guid, NS(Token.CamelCase(t.TokenText.ToLower())), true));
}
public void doBegin(Token t)
{
// this indicates the beginning of a property describing the resource on the top of the stack
Push(new StackElem(t, null, true));
}
public void doComponentBegin(Token t)
{
// beginning of a rdfType for this stmt - ie. it's a new resource
string guid = NewGuid();
StackElem elem = new StackElem(t, guid, false);
if (Count > 0 && Peek().predFlag)
{
StackElem top = Peek();
top.guid = guid;
}
Push(elem);
accumulator.Add(new Triple(RDF("type"), guid, NS(t.TokenText), true));
}
public void doResourceBegin(Token t)
{
Push(new StackElem(t, NewGuid(), true));
}
public void doEndComponent()
{
// Console.WriteLine(mComponentToken.TokenText);
mComponentToken = null;
}
public void doValueProperty(Token t, Token iprop)
{
StackElem elem = Pop();
elem.guid = NewGuid();
accumulator.Add(new Triple(NS(elem.id.TokenText), Peek().guid, elem.guid, true));
if (iprop != null)
{
string tag = NS(Token.CamelCase(iprop.TokenText.ToLower()));
string lprop = Token.CamelCase(iprop.TokenText.ToLower());
string lobj;
if (lprop == "date")
{
lobj = Token.ParseDate(t.TokenText);
}
else
{
lobj = Token.CamelCase(t.TokenText.ToLower());
}
accumulator.Add(new Triple(tag, elem.guid, lobj, false));
}
else
{
accumulator.Add(new Triple(NS("dateTime"), elem.guid, Token.ParseDateTime(t.TokenText), false));
}
Push(elem);
}
public void doID(Token t)
{
mIdToken = t;
}
public void doIprop(Token t, Token iprop)
{
StackElem elem = Pop();
accumulator.Add(new Triple(NS(elem.id.TokenText), Peek().guid, NS(iprop.TokenText), true));
}
public void doResource(Token t) { }
public void doRest(Token t, Token id)
{
StackElem elem = Pop();
accumulator.Add(new Triple(NS(elem.id.TokenText), Peek().guid, t.TokenText, false));
}
public void doMailto(Token t) { }
public void doAttribute(Token key, Token val)
{
string actual;
if (key.TokenText == "until")
{
actual = Token.ParseDateTime(val.TokenText);
}
else
{
actual = val.TokenText;
}
accumulator.Add(new Triple(NS(key.TokenText), Peek().guid, actual, false));
}
public void doIprop(Token t, Token iprop) { }
public StackElem(Token _id, string _guid, bool _predFlag)
{
id = _id;
guid = _guid;
predFlag = _predFlag;
}
public void doAttribute(Token key, Token val) { }
/// <summary>
/// Alternate entry point for starting the parser.
/// </summary>
/// <param name="emitHandT">Indicates if the emitter should be told to emit headers
/// and trailers before and after emitting the iCalendar body</param>
public void Parse(bool emitHandT)
{
buff = new StringBuilder();
stack = new Stack();
linenumber = 0;
attributes = new Stack(); // a stack of key-value pairs (implemented as a stack of DitionaryEntry)
if (emitHandT)
{
emitter.doIntro();
}
// each time through the loop will get a single (maybe folded) line
while (true)
{
// check for termination condition
if (scanner.isEOF())
{
// end of file - do cleanup and go
break;
}
// empty the attribute stack and the iprop value...
attributes.Clear();
iprop = null;
id = null;
//FIXME: linenumber doesn't really keep track of actual line numbers because
// it is not aware of folded lines...
linenumber++;
//DEBUG: emit line number
//emitter.emit( linenumber + ". " );
if (!parseID())
{
continue;
}
// we now have to parse a set of attributes (semi-colon separated) or
// a value (delimited by a colon)
Token sep = scanner.GetNextToken(ScannerState.ParseSimple);
if (sep == null || sep.TokenVal == TokenValue.Error)
{
// some kind of error - skip rest of line and continue
reportError(scanner, " expecting : or ; after id - found nothing.");
continue;
}
else if (sep.TokenVal == TokenValue.SemiColon)
{
if (!parseAttributes(scanner))
{
continue;
}
// now we have to parse the value
sep = scanner.GetNextToken(ScannerState.ParseSimple);
if (!parseValue())
{
continue;
}
}
else if (sep.TokenVal == TokenValue.Colon)
{
if (!parseValue())
{
continue;
}
}
else
{
reportError(scanner, "expecting : or ; after id - found: " + sep.TokenText);
continue;
}
// now sploosh out the attributes (if any) and finish the ID tag
while (attributes.Count > 0)
{
DictionaryEntry entry = (DictionaryEntry)attributes.Pop();
Token key = (Token)entry.Key;
Token val = (Token)entry.Value;
emitter.doAttribute(key, val);
}
emitter.doEnd(id);
}
if (emitHandT)
{
emitter.doOutro();
}
}
public void doResourceBegin(Token t) { }
/// <summary>
/// Parse the first field (ID) of the line. Returns a boolean on weather or not the
/// method sucesfully recognized an ID. If not, the method insures that the scanner
/// will start at the beginning of a new line.
/// </summary>
/// <returns></returns>
protected virtual bool parseID()
{
Token t; // re-usable token variable
id = scanner.GetNextToken(ScannerState.ParseID);
if (id == null || id.TokenVal == TokenValue.Error)
{
// some kind of error - skip rest of line and continue
reportError(scanner, "expecting ID - found nothing.");
return false;
}
switch (id.TokenVal)
{
case TokenValue.Tbegin:
t = scanner.GetNextToken(ScannerState.ParseSimple);
if (t == null || t.isError() || t.TokenVal != TokenValue.Colon)
{
if (t == null)
reportError(scanner, " expecting : - found nothing.");
else
reportError(scanner, " expecting : - found " + t.TokenText);
return false;
}
t = scanner.GetNextToken(ScannerState.ParseID);
if (t == null || t.isError() || (!t.isBeginEndValue() && !t.isResourceProperty()))
{
if (t == null)
reportError(scanner, " expecting a valid beginend value - found nothing.");
else
reportError(scanner, " expecting a valid beginend value - found " + t.TokenText);
return false;
}
// check for the different types of begin tags
if (t.isResourceProperty())
{
emitter.doResourceBegin(t);
}
else if (t.isComponent())
{
emitter.doComponent();
emitter.doComponentBegin(t);
}
else if (t.TokenVal == TokenValue.Tvcalendar)
{
emitter.doComponentBegin(t);
}
else
{
emitter.doBegin(t);
}
stack.Push(t); // to match up to the corresponding end value
//scanner.ConsumeToEOL();
return false;
case TokenValue.Tend:
t = scanner.GetNextToken(ScannerState.ParseSimple);
if (t == null || t.isError() || t.TokenVal != TokenValue.Colon)
{
if (t == null)
reportError(scanner, " expecting : - found nothing.");
else
reportError(scanner, " expecting : - found " + t.TokenText);
return false;
}
t = scanner.GetNextToken(ScannerState.ParseID);
if (t == null || t.isError() || (!t.isBeginEndValue() && !t.isResourceProperty()))
{
if (t == null)
reportError(scanner, " expecting a valid beginend value - found nothing.");
else
reportError(scanner, " expecting a valid beginend value - found " + t.TokenText);
return false;
}
// the end is easier - ignore the last one...
if (stack.Count != 0)
{
emitter.doEnd(t);
if (t.isComponent())
{
emitter.doEndComponent();
}
stack.Pop();
}
else
{
reportError(scanner, "stack stuff is weird - probably illformed .ics file - parsing " + id.TokenText);
}
//scanner.ConsumeToEOL();
return false;
case TokenValue.Trrule:
emitter.doResourceBegin(id);
break;
default:
emitter.doID(id);
break;
}
return true;
}
public void doComponentBegin(Token t)
{
mComponentToken = t;
// Console.WriteLine(t.TokenText);
}
public bool MoveNext()
{
current = scanner.GetNextToken();
return current != null;
}
