/*
    objecttreeparser_p.cpp

    This file is part of KMail, the KDE mail client.
    Copyright (c) 2009 Klarälvdalens Datakonsult AB
    Authors: Marc Mutz <marc@kdab.net>

    KMail is free software; you can redistribute it and/or modify it
    under the terms of the GNU General Public License, version 2, as
    published by the Free Software Foundation.

    KMail is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

    In addition, as a special exception, the copyright holders give
    permission to link the code of this program with any edition of
    the TQt library by Trolltech AS, Norway (or with modified versions
    of TQt that use the same license as TQt), and distribute linked
    combinations including the two.  You must obey the GNU General
    Public License in all respects for all of the code used other than
    TQt.  If you modify this file, you may extend this exception to
    your version of the file, but you are not obligated to do so.  If
    you do not wish to do so, delete this exception statement from
    your version.
*/

#include <config.h>

#include "objecttreeparser_p.h"

#include <kleo/decryptverifyjob.h>
#include <kleo/verifydetachedjob.h>
#include <kleo/verifyopaquejob.h>
#include <kleo/keylistjob.h>

#include <gpgmepp/keylistresult.h>

#include <tqtimer.h>
#include <tqstringlist.h>

#include <cassert>

using namespace KMail;
using namespace Kleo;
using namespace GpgME;

CryptoBodyPartMemento::CryptoBodyPartMemento()
  : TQObject( 0 ),
    Interface::BodyPartMemento(),
    ISubject(),
    m_running( false )
{

}

CryptoBodyPartMemento::~CryptoBodyPartMemento() {}

void CryptoBodyPartMemento::setAuditLog( const GpgME::Error & err, const TQString & log ) {
  m_auditLogError = err;
  m_auditLog = log;
}

void CryptoBodyPartMemento::setRunning( bool running ) {
  m_running = running;
}

GenericVerifyMemento::GenericVerifyMemento(Kleo::KeyListJob * klj)
  : m_keylistjob(klj)
{}

void GenericVerifyMemento::execKeyListJob() {
  if ( canStartKeyListJob() ) {
    std::vector<GpgME::Key> keys;
    m_keylistjob->exec( keyListPattern(), /*secretOnly=*/false, keys );
    if ( !keys.empty() )
      m_key = keys.back();
  }
  destroyKeyListJob(); // exec'ed jobs don't delete themselves
}

bool GenericVerifyMemento::startKeyListJob()
{
  if ( !canStartKeyListJob() )
    return false;
  if ( const GpgME::Error err = m_keylistjob->start( keyListPattern() ) )
    return false;
  connect( m_keylistjob, TQ_SIGNAL(done()), this, TQ_SLOT(slotKeyListJobDone()) );
  connect( m_keylistjob, TQ_SIGNAL(nextKey(const GpgME::Key&)),
           this, TQ_SLOT(slotNextKey(const GpgME::Key&)) );
  return true;
}

void GenericVerifyMemento::destroyKeyListJob() {
  if ( m_keylistjob )
    m_keylistjob->deleteLater();
  m_keylistjob = 0;
}

bool GenericVerifyMemento::canStartKeyListJob() const {
  if ( !m_keylistjob )
    return false;
  const char * const fpr = m_vr.signature( 0 ).fingerprint();
  return fpr && *fpr;
}

void GenericVerifyMemento::slotNextKey( const GpgME::Key & key )
{
  m_key = key;
}

void GenericVerifyMemento::slotKeyListJobDone()
{
  m_keylistjob = 0;
  setRunning( false );
  notify();
}

TQStringList GenericVerifyMemento::keyListPattern() const
{
  assert( canStartKeyListJob() );
  return TQStringList( TQString::fromLatin1( m_vr.signature( 0 ).fingerprint() ) );
}


GenericVerifyMemento::~GenericVerifyMemento() {
  if ( m_keylistjob )
    m_keylistjob->slotCancel();
}

DecryptVerifyBodyPartMemento::DecryptVerifyBodyPartMemento( DecryptVerifyJob * job,
                                                            Kleo::KeyListJob * klj,
                                                            const TQByteArray & cipherText )
  : GenericVerifyMemento(klj),
    m_cipherText( cipherText ),
    m_job( job )
{
  assert( m_job );
}

DecryptVerifyBodyPartMemento::~DecryptVerifyBodyPartMemento() {
  if ( m_job )
    m_job->slotCancel();
}

bool DecryptVerifyBodyPartMemento::start() {
  assert( m_job );
  if ( const GpgME::Error err = m_job->start( m_cipherText ) ) {
    m_dr = DecryptionResult( err );
    return false;
  }
  connect( m_job, TQ_SIGNAL(result(const GpgME::DecryptionResult&,const GpgME::VerificationResult&,const TQByteArray&)),
           this, TQ_SLOT(slotResult(const GpgME::DecryptionResult&,const GpgME::VerificationResult&,const TQByteArray&)) );
  setRunning( true );
  return true;
}

void DecryptVerifyBodyPartMemento::exec() {
  assert( m_job );
  TQByteArray plainText;
  setRunning( true );
  const std::pair<DecryptionResult,VerificationResult> p = m_job->exec( m_cipherText, plainText );
  saveResult( p.first, p.second, plainText );
  m_job->deleteLater(); // exec'ed jobs don't delete themselves
  m_job = 0;
  execKeyListJob();
  setRunning( false );
}

void DecryptVerifyBodyPartMemento::saveResult( const DecryptionResult & dr,
                                               const VerificationResult & vr,
                                               const TQByteArray & plainText )
{
  assert( m_job );
  setRunning( false );
  m_dr = dr;
  setVerificationResult( vr );
  m_plainText = plainText;
  setAuditLog( m_job->auditLogError(), m_job->auditLogAsHtml() );
}

void DecryptVerifyBodyPartMemento::slotResult( const DecryptionResult & dr,
                                               const VerificationResult & vr,
                                               const TQByteArray & plainText )
{
  saveResult( dr, vr, plainText );
  setRunning( false );
  m_job = 0;
  if ( startKeyListJob() )
    return;
  destroyKeyListJob();
  setRunning( false );
  notify();
}


VerifyDetachedBodyPartMemento::VerifyDetachedBodyPartMemento( VerifyDetachedJob * job,
                                                              KeyListJob * klj,
                                                              const TQByteArray & signature,
                                                              const TQByteArray & plainText )
  : GenericVerifyMemento(klj),
    m_signature( signature ),
    m_plainText( plainText ),
    m_job( job )
{
  assert( m_job );
}

VerifyDetachedBodyPartMemento::~VerifyDetachedBodyPartMemento() {
  if ( m_job )
    m_job->slotCancel();
}

bool VerifyDetachedBodyPartMemento::start() {
  assert( m_job );
  if ( const GpgME::Error err = m_job->start( m_signature, m_plainText ) ) {
    setVerificationResult( VerificationResult( err ) );
    return false;
  }
  connect( m_job, TQ_SIGNAL(result(const GpgME::VerificationResult&)),
           this, TQ_SLOT(slotResult(const GpgME::VerificationResult&)) );
  setRunning( true );
  return true;
}

void VerifyDetachedBodyPartMemento::exec() {
  assert( m_job );
  setRunning( true );
  saveResult( m_job->exec( m_signature, m_plainText ) );
  m_job->deleteLater(); // exec'ed jobs don't delete themselves
  m_job = 0;
  execKeyListJob();
  setRunning( false );
}

void VerifyDetachedBodyPartMemento::saveResult( const VerificationResult & vr )
{
  assert( m_job );
  setVerificationResult( vr );
  setAuditLog( m_job->auditLogError(), m_job->auditLogAsHtml() );
}

void VerifyDetachedBodyPartMemento::slotResult( const VerificationResult & vr )
{
  saveResult( vr );
  m_job = 0;
  if ( startKeyListJob() )
    return;
  destroyKeyListJob();
  setRunning( false );
  notify();
}

VerifyOpaqueBodyPartMemento::VerifyOpaqueBodyPartMemento( VerifyOpaqueJob * job,
                                                          KeyListJob *  klj,
                                                          const TQByteArray & signature )
  : GenericVerifyMemento(klj),
    m_signature( signature ),
    m_job( job )
{
  assert( m_job );
}

VerifyOpaqueBodyPartMemento::~VerifyOpaqueBodyPartMemento() {
  if ( m_job )
    m_job->slotCancel();
}

bool VerifyOpaqueBodyPartMemento::start() {
  assert( m_job );
  if ( const GpgME::Error err = m_job->start( m_signature ) ) {
    setVerificationResult( VerificationResult( err ));
    return false;
  }
  connect( m_job, TQ_SIGNAL(result(const GpgME::VerificationResult&,const TQByteArray&)),
           this, TQ_SLOT(slotResult(const GpgME::VerificationResult&,const TQByteArray&)) );
  setRunning( true );
  return true;
}

void VerifyOpaqueBodyPartMemento::exec() {
  assert( m_job );
  setRunning( true );
  TQByteArray plainText;
  saveResult( m_job->exec( m_signature, plainText ), plainText );
  m_job->deleteLater(); // exec'ed jobs don't delete themselves
  m_job = 0;
  execKeyListJob();
  setRunning( false );
}

void VerifyOpaqueBodyPartMemento::saveResult( const VerificationResult & vr,
                                              const TQByteArray & plainText )
{
  assert( m_job );
  setVerificationResult(vr);
  m_plainText = plainText;
  setAuditLog( m_job->auditLogError(), m_job->auditLogAsHtml() );
}

void VerifyOpaqueBodyPartMemento::slotResult( const VerificationResult & vr,
                                              const TQByteArray & plainText )
{
  saveResult( vr, plainText );
  m_job = 0;
  if ( startKeyListJob() )
    return;
  destroyKeyListJob();
  setRunning( false );
  notify();
}


#include "objecttreeparser_p.moc"