kopetewalletmanager.cpp

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/*
    kopetewalletmanager.cpp - Kopete Wallet Manager

    Copyright (c) 2004      by Richard Smith         <kde@metafoo.co.uk>
    Kopete    (c) 2002-2004 by the Kopete developers <kopete-devel@kde.org>

    *************************************************************************
    *                                                                       *
    * This library is free software; you can redistribute it and/or         *
    * modify it under the terms of the GNU Lesser General Public            *
    * License as published by the Free Software Foundation; either          *
    * version 2 of the License, or (at your option) any later version.      *
    *                                                                       *
    *************************************************************************
*/

#include "kopetewalletmanager.h"

#include "kopeteuiglobal.h"

#include <kdebug.h>
#include <kwallet.h>

#include <qtimer.h>
#include <qwidget.h>
#include <qapplication.h>

static WId mainWindowID()
{
    if ( QWidget *w = Kopete::UI::Global::mainWidget() )
        return w->winId();
    return 0;
}

class Kopete::WalletManager::Private
{
public:
    Private() : wallet(0), signal(0) {}
    ~Private() { delete wallet; delete signal; }

    KWallet::Wallet *wallet;

    // we can't just connect every slot that wants the wallet to the
    // walletOpened signal - since we disconnect all the slots immediately
    // after emitting the signal, this would result in everyone who asked
    // for the wallet again in response to a walletOpened signal to fail
    // to receive it.
    // instead, we store a KopeteWalletSignal which we connect to, and create
    // a new one for each set of requests.
    KopeteWalletSignal *signal;
};

Kopete::WalletManager::WalletManager()
 : d( new Private )
{
}

Kopete::WalletManager::~WalletManager()
{
    closeWallet();
    delete d;
}

Kopete::WalletManager *Kopete::WalletManager::self()
{
    static WalletManager s;
    return &s;
}

void Kopete::WalletManager::openWallet( QObject *object, const char *slot )
{
    if ( !d->signal )
        d->signal = new KopeteWalletSignal;
    // allow connecting to protected slots  by calling object->connect
    connect( d->signal, SIGNAL(walletOpened(KWallet::Wallet*)), object, slot );
    //object->connect( d->signal, SIGNAL(walletOpened(KWallet::Wallet*)), slot );
    openWalletInner();
}

void Kopete::WalletManager::openWalletInner()
{
    // do we already have a wallet?
    if ( d->wallet )
    {
        // if the wallet isn't open yet, we're pending a slotWalletChangedStatus
        // anyway, so we don't set up a single shot.
        if ( d->wallet->isOpen() )
        {
            kDebug(14010) << " wallet already open";
            QTimer::singleShot( 0, this, SLOT(slotGiveExistingWallet()) );
        }
        else
        {
            kDebug(14010) << " still waiting for earlier request";
        }
        return;
    }
    
    kDebug(14010) << " about to open wallet async";

    // we have no wallet: ask for one.
    d->wallet = KWallet::Wallet::openWallet( KWallet::Wallet::NetworkWallet(),
                mainWindowID(), KWallet::Wallet::Asynchronous );

    if ( !d->wallet )
    {
        emitWalletOpened( 0 );
        return;
    }

    connect( d->wallet, SIGNAL(walletOpened(bool)), SLOT(slotWalletChangedStatus()) );
}

void Kopete::WalletManager::slotWalletChangedStatus()
{
    kDebug(14010) << " isOpen: " << d->wallet->isOpen();

    if( d->wallet->isOpen() )
    {
        if ( !d->wallet->hasFolder( QString::fromLatin1( "Kopete" ) ) )
            d->wallet->createFolder( QString::fromLatin1( "Kopete" ) );

        if ( d->wallet->setFolder( QString::fromLatin1( "Kopete" ) ) )
        {
            kDebug(14010) << "Successfully opened the wallet !";
            // success!
            QObject::connect( d->wallet, SIGNAL(walletClosed()), this, SLOT(closeWallet()) );
        }
        else
        {
            // opened OK, but we can't use it
            delete d->wallet;
            d->wallet = 0;
        }
    }
    else
    {
        // failed to open
        delete d->wallet;
        d->wallet = 0;

        kWarning(14010) << "wallet open error";
    }

    emitWalletOpened( d->wallet );
}

void Kopete::WalletManager::slotGiveExistingWallet()
{
    kDebug(14010) << " with d->wallet " << d->wallet;

    if ( d->wallet )
    {
        // the wallet was already open
        if ( d->wallet->isOpen() )
            emitWalletOpened( d->wallet );
        // if the wallet was not open, but d->wallet is not 0,
        // then we're waiting for it to open, and will be told
        // when it's done: do nothing.
        else
            kDebug(14010) << " wallet gone, waiting for another wallet";
    }
    else
    {
        // the wallet was lost between us trying to open it and
        // getting called back. try to reopen it.
        openWalletInner();
    }
}

void Kopete::WalletManager::closeWallet()
{
    if ( !d->wallet ) return;

    delete d->wallet;
    d->wallet = 0L;

    emit walletLost();
}

void Kopete::WalletManager::emitWalletOpened( KWallet::Wallet *wallet )
{
    KopeteWalletSignal *signal = d->signal;
    d->signal = 0;
    if ( signal )
        emit signal->walletOpened( wallet );
    delete signal;
}


#include "kopetewalletmanager.moc"

// vim: set noet ts=4 sts=4 sw=4: