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squawk/ui/models/messagefeed.cpp

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/*
* Squawk messenger.
* Copyright (C) 2019 Yury Gubich <blue@macaw.me>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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, see <http://www.gnu.org/licenses/>.
*/
#include "messagefeed.h"
#include <QDebug>
MessageFeed::MessageFeed(QObject* parent):
QAbstractListModel(parent),
storage(),
indexById(storage.get<id>()),
indexByTime(storage.get<time>()),
syncState(incomplete)
{
}
MessageFeed::~MessageFeed()
{
for (Shared::Message* message : storage) {
delete message;
}
}
void MessageFeed::addMessage(const Shared::Message& msg)
{
QString id = msg.getId();
StorageById::const_iterator itr = indexById.find(id);
if (itr != indexById.end()) {
qDebug() << "received more then one message with the same id, skipping yet the new one";
return;
}
Shared::Message* copy = new Shared::Message(msg);
StorageByTime::const_iterator tItr = indexByTime.upper_bound(msg.getTime());
int position;
if (tItr == indexByTime.end()) {
position = storage.size();
} else {
position = indexByTime.rank(tItr);
}
beginInsertRows(QModelIndex(), position, position);
storage.insert(copy);
endInsertRows();
}
void MessageFeed::changeMessage(const QString& id, const Shared::Message& msg)
{
}
void MessageFeed::removeMessage(const QString& id)
{
}
QVariant MessageFeed::data(const QModelIndex& index, int role) const
{
int i = index.row();
if (syncState == syncing) {
--i;
}
QVariant answer;
switch (role) {
case Qt::DisplayRole: {
if (i == -1) {
return "Loading...";
}
StorageByTime::const_iterator itr = indexByTime.nth(i);
if (itr != indexByTime.end()) {
const Shared::Message* msg = *itr;
answer = msg->getFrom() + ": " + msg->getBody();
}
}
break;
default:
break;
}
return answer;
}
int MessageFeed::rowCount(const QModelIndex& parent) const
{
int count = storage.size();
if (syncState == syncing) {
count++;
}
return count;
}
unsigned int MessageFeed::unreadMessagesCount() const
{
return storage.size(); //let's say they are all new for now =)
}
bool MessageFeed::canFetchMore(const QModelIndex& parent) const
{
return syncState == incomplete;
}
void MessageFeed::fetchMore(const QModelIndex& parent)
{
if (syncState == incomplete) {
beginInsertRows(QModelIndex(), 0, 0);
syncState = syncing;
endInsertRows();
if (storage.size() == 0) {
emit requestArchive("");
} else {
emit requestArchive((*indexByTime.nth(0))->getId());
}
}
}
void MessageFeed::responseArchive(const std::list<Shared::Message> list)
{
if (syncState == syncing) {
beginRemoveRows(QModelIndex(), 0, 0);
syncState = incomplete;
endRemoveRows();
}
beginInsertRows(QModelIndex(), 0, list.size() - 1);
for (const Shared::Message& msg : list) {
Shared::Message* copy = new Shared::Message(msg);
storage.insert(copy);
}
endInsertRows();
}