// Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies).

// All rights reserved.

// This component and the accompanying materials are made available

// under the terms of "Eclipse Public License v1.0"

// which accompanies this distribution, and is available

// at the URL "http://www.eclipse.org/legal/epl-v10.html".

//

// Initial Contributors:

// Nokia Corporation - initial contribution.

//

// Contributors:

//

// Description:

// Send/Expect Algorithms

// 

//

#include "ATSTD.H"

#include "SCHAT.H"

#include "mSLOGGER.H"

CCommChatString* CCommChatString::NewL(const TDesC8& aDes, TBool aIsPartialLine)

	{

	CCommChatString* cs = new (ELeave) CCommChatString;

	CleanupStack::PushL(cs);

	cs->CreateL(aDes, aIsPartialLine);

	CleanupStack::Pop();

	return cs;

	}

CCommChatString::CCommChatString()

	{

	}

CCommChatString::~CCommChatString()

	{

	}

void CCommChatString::CreateL(const TDesC8& aDes, TBool aIsPartialLine)

	{

	iIsPartialLine = aIsPartialLine;

	iMatch.Set(aDes);

	}

//

// CCommChatter

//

CCommChatter::CCommChatter(MCommChatNotify* aNotify, TInt aPriority)

	: CTimer(aPriority), iNotify(aNotify)

	{

	CActiveScheduler::Add(this);

	iList.SetOffset(_FOFF(CCommChatString,iLink));

	}

CCommChatter::~CCommChatter()

	{

	DeleteAllAndStop();

	User::Free(iBuffer);

	}

void CCommChatter::CreateL(TInt aBufSize)

	{

	CTimer::ConstructL();

	iBuffer = (TText8*)User::AllocL(aBufSize);

	iBufferEnd = (iBuffer+aBufSize)-1;

	ClearBuffer();

	}

void CCommChatter::ClearBuffer()

//

// Empty history

//

	{

	iLastChar = iBuffer;

	iLineStart = iBuffer;

	iInDelimiter = ETrue;	// as though the last character was the end of a line

	}

void CCommChatter::ClearCurrentLine()

//

// Remove current line, which is always at the end of the buffer

//

	{

	iLastChar = iLineStart;

	iInDelimiter = ETrue;	// as though the last character was the end of a line

	}

TPtrC8 CCommChatter::Buffer() const

	{

	return TPtrC8(iBuffer, iLastChar-iBuffer);

	}

TPtrC8 CCommChatter::CurrentLine() const

	{

	TInt len=iLastChar-iLineStart;

	if (len>0 && iInDelimiter)

		len-=1;

	return TPtrC8(iLineStart, len);

	}

void CCommChatter::AddCharL(TText8 aChar)

//

// Add a character to the history buffer

// Scan all strings to find any matches that may

// be completed.

//

	{

	// Prevent reading of multiple delimiters into buffer

	if (iInDelimiter && (aChar == '\r' || aChar == '\n'))

		return;

	*iLastChar++=aChar;

	if (iLastChar>=iBufferEnd)

		{

		iLastChar = iBufferEnd; // Discarding characters at this point

		}

	if (aChar=='\r' || aChar=='\n')

		{

		if (iInDelimiter)

			return;		// still in delimiting sequence

		iInDelimiter=ETrue;

		}

	else

		{

		if (iInDelimiter)

			{

			iInDelimiter=EFalse;

			iLineStart=iLastChar-1;

			}

		if (iPartLineMatchers==0)

			return;		// wait for end of line before trying to match

		}

	// Scan for matching expect string

	TPtrC8 line(CurrentLine());

	CCommChatString* cs;

	TDblQueIter<CCommChatString> iter(iList);

	if (iInDelimiter)

		{

		// Simple match at end of line - test all strings

		while (cs = iter++, cs!=NULL)

			{

			if (line.Match(cs->iMatch)==0)

				{

				LOGTEXT2(_L8("SChat:\tFound match against =>%S<"), &cs->iMatch);

				iNotify->ChatStringMatchL(cs);

				cs = iter;	// In case user removed cs;

				}

			}

		}

	else

		{

		// partial match - use only selected matchers

		while (cs = iter++, cs!=NULL)

			{

			if (cs->iIsPartialLine && line.Match(cs->iMatch)==0)

				{

				LOGTEXT2(_L8("SChat:\tFound match against partial line =>%S<"), &cs->iMatch);

				iNotify->ChatStringMatchL(cs);

				cs = iter;	// In case user removed cs;

				}

			}

		}

	}

void CCommChatter::RunL()

	{

	iNotify->ChatTimeout();

	}

CCommChatString* CCommChatter::AddStringL(const TDesC8& aString, TBool aPartLine)

	{

	CCommChatString* chatString=CCommChatString::NewL(aString,aPartLine);

	iList.AddLast(*chatString);

	if (aPartLine)

		iPartLineMatchers+=1;

	return chatString;

	}

void CCommChatter::RemoveString(CCommChatString* aString)

	{

	_LIT(KCCommChatterPanic, "GSMTSY-CHAT");

	aString->iLink.Deque();

	if (aString->iIsPartialLine)

		{

		iPartLineMatchers-=1;

		__ASSERT_ALWAYS(iPartLineMatchers>=0, User::Panic(KCCommChatterPanic,1));

		}

	}

void CCommChatter::DeleteAllAndStop()

	{

	StopTimer();

	CCommChatString* cs;

	while (!iList.IsEmpty())

		{

		cs = iList.First();

		RemoveString(cs);

		delete cs;

		}

	iPartLineMatchers=0;

	}

void CCommChatter::StartTimer(const TTimeIntervalMicroSeconds32 aTimeout)

	{

	if (IsActive())

		Cancel();

	After(aTimeout);

	}

void CCommChatter::StopTimer()

	{

	Cancel();

	}