conversation.cpp 7.46 KB
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/*
    Copyright (C) 2011  Lasath Fernando <kde@lasath.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 2.1 of the License, or (at your option) any later version.

    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
    Lesser General Public License for more details.

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


#include "conversation.h"
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#include "messages-model.h"
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#include <TelepathyQt/TextChannel>
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#include <TelepathyQt/Account>
#include <TelepathyQt/PendingChannelRequest>
#include <TelepathyQt/PendingChannel>

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#include <KDebug>
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#include "channel-delegator.h"

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class Conversation::ConversationPrivate
{
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  public:
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    MessagesModel *messages;
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    //stores if the conversation has been delegated to another client and we are only observing the channel
    //and not handling it.
    bool delegated;
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    bool valid;
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    Tp::AccountPtr account;
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    QTimer *pausedStateTimer;
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    // May be null for group chats.
    KTp::ContactPtr targetContact;
    bool isGroupChat;
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};

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Conversation::Conversation(const Tp::TextChannelPtr &channel,
                           const Tp::AccountPtr &account,
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                           QObject *parent) :
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        QObject(parent),
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        d (new ConversationPrivate)
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{
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    kDebug();

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    d->account = account;
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    connect(d->account.data(), SIGNAL(connectionChanged(Tp::ConnectionPtr)), SLOT(onAccountConnectionChanged(Tp::ConnectionPtr)));
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    d->messages = new MessagesModel(account, this);
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    setTextChannel(channel);
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    d->delegated = false;

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    d->pausedStateTimer = new QTimer(this);
    d->pausedStateTimer->setSingleShot(true);
    connect(d->pausedStateTimer, SIGNAL(timeout()), this, SLOT(onChatPausedTimerExpired()));
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    if (channel->targetContact().isNull()) {
        d->isGroupChat = true;
    } else {
        d->isGroupChat = false;
        d->targetContact = KTp::ContactPtr::qObjectCast(channel->targetContact());
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        connect(d->targetContact.constData(), SIGNAL(aliasChanged(QString)), SIGNAL(titleChanged()));
        connect(d->targetContact.constData(), SIGNAL(presenceChanged(Tp::Presence)), SIGNAL(presenceIconChanged()));
        connect(d->targetContact.constData(), SIGNAL(avatarDataChanged(Tp::AvatarData)), SIGNAL(avatarChanged()));
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    }
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}

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Conversation::Conversation(QObject *parent) : QObject(parent)
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{
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    kError() << "Conversation should not be created directly. Use ConversationWatcher instead.";
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    Q_ASSERT(false);
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}

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void Conversation::setTextChannel(const Tp::TextChannelPtr& channel)
{
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    if (d->messages->textChannel() != channel) {
        d->messages->setTextChannel(channel);
        d->valid = channel->isValid();
        connect(channel.data(), SIGNAL(invalidated(Tp::DBusProxy*,QString,QString)),
                SLOT(onChannelInvalidated(Tp::DBusProxy*,QString,QString)));
        Q_EMIT validityChanged(d->valid);
    }
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}

Tp::TextChannelPtr Conversation::textChannel() const
{
    return d->messages->textChannel();
}

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MessagesModel* Conversation::messages() const
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{
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    return d->messages;
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}

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QString Conversation::title() const
{
    if (d->isGroupChat) {
        QString roomName = textChannel()->targetId();
        return roomName.left(roomName.indexOf(QLatin1Char('@')));
    } else {
        return d->targetContact->alias();
    }
}

QIcon Conversation::presenceIcon() const
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{
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    if (d->isGroupChat) {
        return KTp::Presence(Tp::Presence::available()).icon();
    } else {
        return KTp::Presence(d->targetContact->presence()).icon();
    }
}

QIcon Conversation::avatar() const
{
    if (d->isGroupChat) {
        return QIcon();
    } else {
        QString path = d->targetContact->avatarData().fileName;
        if (path.isEmpty()) {
            path = QLatin1String("im-user");
        }
        return KIcon(path);
    }
}

KTp::ContactPtr Conversation::targetContact() const {
    if (d->isGroupChat) {
        return KTp::ContactPtr();
    } else {
        return d->targetContact;
    }
}

Tp::AccountPtr Conversation::account() const {
    return d->account;
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}

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bool Conversation::isValid()
{
    return d->valid;
}

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void Conversation::onChannelInvalidated(Tp::DBusProxy *proxy, const QString &errorName, const QString &errorMessage)
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{
    kDebug() << proxy << errorName << ":" << errorMessage;

    d->valid = false;

    Q_EMIT validityChanged(d->valid);
}

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void Conversation::onAccountConnectionChanged(const Tp::ConnectionPtr& connection)
{
    //if we have reconnected and we were handling the channel
    if (connection && ! d->delegated) {

        //general convention is to never use ensureAndHandle when we already have a client registrar
        //ensureAndHandle will implicity create a new temporary client registrar which is a waste
        //it's also more code to get the new channel

        //However, we cannot use use ensureChannel as normal because without being able to pass a preferredHandler
        //we need a preferredHandler so that this handler is the one that ends up with the channel if multi handlers are active
        //we do not know the name that this handler is currently registered with
        Tp::PendingChannel *pendingChannel = d->account->ensureAndHandleTextChat(textChannel()->targetId());
        connect(pendingChannel, SIGNAL(finished(Tp::PendingOperation*)), SLOT(onCreateChannelFinished(Tp::PendingOperation*)));
    }
}

void Conversation::onCreateChannelFinished(Tp::PendingOperation* op)
{
    Tp::PendingChannel *pendingChannelOp = qobject_cast<Tp::PendingChannel*>(op);
    Tp::TextChannelPtr textChannel = Tp::TextChannelPtr::dynamicCast(pendingChannelOp->channel());
    if (textChannel) {
        setTextChannel(textChannel);
    }
}

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void Conversation::delegateToProperClient()
{
    ChannelDelegator::delegateChannel(d->account, d->messages->textChannel());
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    d->delegated = true;
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    Q_EMIT conversationCloseRequested();
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}

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void Conversation::requestClose()
{
    kDebug();
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    //removing from the model will delete this object closing the channel
    Q_EMIT conversationCloseRequested();
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}

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void Conversation::updateTextChanged(const QString &message)
{
    if (!message.isEmpty()) {
        //if the timer is active, it means the user is continuously typing
        if (d->pausedStateTimer->isActive()) {
            //just restart the timer and don't spam with chat state changes
            d->pausedStateTimer->start(5000);
        } else {
            //if the user has just typed some text, set state to Composing and start the timer
            d->messages->textChannel()->requestChatState(Tp::ChannelChatStateComposing);
            d->pausedStateTimer->start(5000);
        }
    } else {
        //if the user typed no text/cleared the input field, set Active and stop the timer
        d->messages->textChannel()->requestChatState(Tp::ChannelChatStateActive);
        d->pausedStateTimer->stop();
    }
}

void Conversation::onChatPausedTimerExpired()
{
    d->messages->textChannel()->requestChatState(Tp::ChannelChatStatePaused);
}

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Conversation::~Conversation()
{
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    kDebug();
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    //if we are not handling the channel do nothing.
    if (!d->delegated) {
        d->messages->textChannel()->requestClose();
    }
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    delete d;
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}