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/*
 * Copyright (c) 2013 Tobias Markmann
 * Licensed under the simplified BSD license.
 * See Documentation/Licenses/BSD-simplified.txt for more information.
 */

#include <Swift/QtUI/UserSearch/ContactListModel.h>

#include <Swift/QtUI/QtSwiftUtil.h>
#include <Swiften/Base/Path.h>
#include <Swiften/Base/foreach.h>
#include <Swiften/Elements/StatusShow.h>

#include <QMimeData>

namespace Swift {

QDataStream& operator >>(QDataStream& in, StatusShow::Type& e){
	quint32 buffer;
	in >> buffer;
	switch(buffer) {
		case StatusShow::Online:
			e = StatusShow::Online;
			break;
		case StatusShow::Away:
			e = StatusShow::Away;
			break;
		case StatusShow::FFC:
			e = StatusShow::FFC;
			break;
		case StatusShow::XA:
			e = StatusShow::XA;
			break;
		case StatusShow::DND:
			e = StatusShow::DND;
			break;
		default:
			e = StatusShow::None;
			break;
	}
	return in;
}

ContactListModel::ContactListModel(bool editable) : QAbstractItemModel(), editable_(editable) {
}

void ContactListModel::setList(const std::vector<Contact>& list) {
	emit layoutAboutToBeChanged();
	contacts_ = list;
	emit layoutChanged();
}

const std::vector<Contact>& ContactListModel::getList() const {
	return contacts_;
}

Qt::ItemFlags ContactListModel::flags(const QModelIndex& index) const {
	Qt::ItemFlags flags = QAbstractItemModel::flags(index);
	if (index.isValid()) {
		flags = flags & ~Qt::ItemIsDropEnabled;
	} else {
		flags = Qt::ItemIsDropEnabled | flags;
	}
	return flags;
}

int ContactListModel::columnCount(const QModelIndex&) const {
	return editable_ ? 2 : 1;
}

QVariant ContactListModel::data(const QModelIndex& index, int role) const {
	if (boost::numeric_cast<size_t>(index.row()) < contacts_.size()) {
		const Contact& contact = contacts_[index.row()];
		if (role == Qt::EditRole) {
			return P2QSTRING(contact.jid.toString());
		}
		return dataForContact(contact, role);
	} else {
		return QVariant();
	}
}

bool ContactListModel::dropMimeData(const QMimeData* data, Qt::DropAction /*action*/, int /*row*/, int /*column*/, const QModelIndex& /*parent*/) {
	if (!data->hasFormat("application/vnd.swift.contact-jid")) {
		return false;
	}

	QByteArray dataBytes = data->data("application/vnd.swift.contact-jid");
	QDataStream dataStream(&dataBytes, QIODevice::ReadOnly);
	QString jidString;
	QString displayName;
	QString statusText;
	StatusShow::Type statusType;
	QString avatarPath;

	dataStream >> jidString;
	dataStream >> displayName;
	dataStream >> statusText;
	dataStream >> statusType;
	dataStream >> avatarPath;

	JID jid = JID(Q2PSTRING(jidString));

	foreach(const Contact& contact, contacts_) {
		if (contact.jid == jid) {
			return false;
		}
	}

	emit layoutAboutToBeChanged();
	contacts_.push_back(Contact(Q2PSTRING(displayName), jid, statusType, Q2PSTRING(avatarPath)));
	emit layoutChanged();

	onJIDsDropped(std::vector<JID>(1, jid));
	onListChanged(getList());

	return true;
}

QModelIndex ContactListModel::index(int row, int column, const QModelIndex& parent) const {
	if (!hasIndex(row, column, parent)) {
		return QModelIndex();
	}

	return boost::numeric_cast<size_t>(row) < contacts_.size() ? createIndex(row, column, (void*)&(contacts_[row])) : QModelIndex();
}

QModelIndex ContactListModel::parent(const QModelIndex& index) const {
	if (!index.isValid()) {
		return QModelIndex();
	}
	return QModelIndex();
}

int ContactListModel::rowCount(const QModelIndex& /*parent*/) const {
	return contacts_.size();
}

bool ContactListModel::removeRows(int row, int /*count*/, const QModelIndex& /*parent*/) {
	if (boost::numeric_cast<size_t>(row) < contacts_.size()) {
		emit layoutAboutToBeChanged();
		contacts_.erase(contacts_.begin() + row);
		emit layoutChanged();
		onListChanged(getList());
		return true;
	}
	return false;
}

QVariant ContactListModel::dataForContact(const Contact& contact, int role) const {
	switch (role) {
		case Qt::DisplayRole: return P2QSTRING(contact.name);
		case DetailTextRole: return P2QSTRING(contact.jid.toString());
		case AvatarRole: return QVariant(P2QSTRING(pathToString(contact.avatarPath)));
		case PresenceIconRole: return getPresenceIconForContact(contact);
		default: return QVariant();
	}
}

QIcon ContactListModel::getPresenceIconForContact(const Contact& contact) const {
	QString iconString;
	switch (contact.statusType) {
		case StatusShow::Online: iconString = "online";break;
		case StatusShow::Away: iconString = "away";break;
		case StatusShow::XA: iconString = "away";break;
		case StatusShow::FFC: iconString = "online";break;
		case StatusShow::DND: iconString = "dnd";break;
		case StatusShow::None: iconString = "offline";break;
	}
	return QIcon(":/icons/" + iconString + ".png");
}

}