/* This file is part of the KDE libraries
   Copyright (C) 1999 Torben Weis <weis@kde.org>
   Copyright (C) 2003 Waldo Bastian <bastian@kde.org>

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

   This library 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
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public License
   along with this library; see the file COPYING.LIB.  If not, write to
   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
   Boston, MA 02110-1301, USA.
*/

#include "kprotocolinfofactory.h"

#include <kstandarddirs.h>
#include <kdebug.h>
#include <ksycoca.h>
#include <ksycocadict_p.h>

thread_local KProtocolInfoFactory* kProtocolInfoFactoryInstance = 0;

KProtocolInfoFactory::KProtocolInfoFactory() : KSycocaFactory( KST_KProtocolInfoFactory )
{
    kProtocolInfoFactoryInstance = this;
}

KProtocolInfoFactory::~KProtocolInfoFactory()
{
    if (kProtocolInfoFactoryInstance) {
        kProtocolInfoFactoryInstance = 0;
    }
}

KProtocolInfo* KProtocolInfoFactory::createEntry(int offset) const
{
    KProtocolInfo *info = 0;
    KSycocaType type;
    QDataStream *str = KSycoca::self()->findEntry(offset, type);
    switch (type) {
        case KST_KProtocolInfo:
            info = new KProtocolInfo(*str, offset);
            break;
        default:
            return 0;
    }
    if (!info->isValid()) {
        delete info;
        info = 0;
    }
    return info;
}


QStringList KProtocolInfoFactory::protocols() const
{
    QStringList res;
    const KSycocaEntry::List list = allEntries();
    res.reserve(list.size());
    for (KSycocaEntry::List::const_iterator it = list.begin(); it != list.end(); ++it) {
        const KSycocaEntry *entry = (*it).data();
        const KProtocolInfo *info = static_cast<const KProtocolInfo *>(entry);
        res.append(info->name());
    }
    return res;
}

KProtocolInfo::List KProtocolInfoFactory::allProtocols() const
{
    KProtocolInfo::List result;
    const KSycocaEntry::List list = allEntries();
    for( KSycocaEntry::List::ConstIterator it = list.begin(); it != list.end(); ++it) {
        if ((*it)->isType(KST_KProtocolInfo)) {
            result.append(KProtocolInfo::Ptr::staticCast(*it));
        }
    }
    return result;
}

KProtocolInfo::Ptr KProtocolInfoFactory::findProtocol(const QString &protocol)
{
    if (!sycocaDict()) {
        return KProtocolInfo::Ptr(); // Error!
    }

    QMap<QString,KProtocolInfo::Ptr>::iterator it = m_cache.find(protocol);
    if (it != m_cache.end()) {
        return *it;
    }

    int offset = sycocaDict()->find_string(protocol);
    if (!offset) {
        return KProtocolInfo::Ptr(); // Not found;
    }

    KProtocolInfo::Ptr info(createEntry(offset));

    if (info && (info->name() != protocol)) {
        // No it wasn't...
        return KProtocolInfo::Ptr(); // Not found
    }
    m_cache.insert(protocol, info);
    return info;
}

KProtocolInfoFactory* KProtocolInfoFactory::self()
{
    if (!kProtocolInfoFactoryInstance) {
        kProtocolInfoFactoryInstance = new KProtocolInfoFactory();
    }
    return kProtocolInfoFactoryInstance;
}