Desktop Qt based XMPP messenger
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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 "rosteritem.h"
#include <QDebug>
Core::RosterItem::RosterItem(const QString& pJid, const QString& account, QObject* parent):
QObject(parent),
jid(pJid),
name(),
archiveState(empty),
archive(new Archive(jid)),
subscriptionState(Shared::unknown),
syncronizing(false),
requestedCount(0),
requestedBefore(),
hisoryCache(),
appendCache(),
responseCache(),
requestCache()
{
archive->open(account);
if (archive->isFromTheBeginning()) {
archiveState = beginning;
} else {
if (archive->size() != 0) {
archiveState = chunk;
}
}
}
Core::RosterItem::~RosterItem()
{
delete archive;
}
Core::RosterItem::ArchiveState Core::RosterItem::getArchiveState() const
{
return archiveState;
}
Shared::SubscriptionState Core::RosterItem::getSubscriptionState() const
{
return subscriptionState;
}
QString Core::RosterItem::getName() const
{
return name;
}
void Core::RosterItem::setSubscriptionState(Shared::SubscriptionState state)
{
if (subscriptionState != state) {
subscriptionState = state;
emit subscriptionStateChanged(subscriptionState);
}
}
void Core::RosterItem::setName(const QString& n)
{
if (name != n) {
name = n;
emit nameChanged(name);
}
}
void Core::RosterItem::addMessageToArchive(const Shared::Message& msg)
{
if (msg.getId().size() > 0 && msg.getBody().size() > 0) {
hisoryCache.push_back(msg);
}
}
void Core::RosterItem::requestHistory(int count, const QString& before)
{
if (syncronizing) {
requestCache.emplace_back(count, before);
} else {
performRequest(count, before);
}
}
void Core::RosterItem::nextRequest()
{
if (syncronizing) {
if (requestedCount != -1) {
emit historyResponse(responseCache);
}
}
if (requestCache.size() > 0) {
std::pair<int, QString> request = requestCache.front();
requestCache.pop_front();
performRequest(request.first, request.second);
} else {
syncronizing = false;
requestedCount = 0;
requestedBefore = "";
hisoryCache.clear();
responseCache.clear();
}
}
void Core::RosterItem::performRequest(int count, const QString& before)
{
syncronizing = true;
requestedCount = count;
requestedBefore = before;
hisoryCache.clear();
responseCache.clear();
switch (archiveState) {
case empty:
emit needHistory(before, "");
break;
case chunk:
case beginning: {
if (count != -1) {
requestCache.emplace_back(requestedCount, before);
requestedCount = -1;
}
Shared::Message msg = archive->newest();
emit needHistory("", msg.getId(), msg.getTime());
}
break;
case end:
if (count != -1) {
QString lBefore;
if (responseCache.size() > 0) {
lBefore = responseCache.front().getId();
} else {
lBefore = before;
}
bool found = false;
try {
std::list<Shared::Message> arc = archive->getBefore(requestedCount - responseCache.size(), lBefore);
responseCache.insert(responseCache.begin(), arc.begin(), arc.end());
found = true;
} catch (Archive::NotFound e) {
requestCache.emplace_back(requestedCount, before);
requestedCount = -1;
emit needHistory(archive->oldestId(), "");
} catch (Archive::Empty e) {
requestCache.emplace_back(requestedCount, before);
requestedCount = -1;
emit needHistory(archive->oldestId(), "");
}
if (found) {
int rSize = responseCache.size();
if (rSize < count) {
if (rSize != 0) {
emit needHistory(responseCache.front().getId(), "");
} else {
emit needHistory(before, "");
}
} else {
nextRequest();
}
}
} else {
emit needHistory(archive->oldestId(), "");
}
break;
case complete:
try {
std::list<Shared::Message> arc = archive->getBefore(requestedCount - responseCache.size(), before);
responseCache.insert(responseCache.begin(), arc.begin(), arc.end());
} catch (Archive::NotFound e) {
qDebug("requesting id hasn't been found in archive, skipping");
} catch (Archive::Empty e) {
qDebug("requesting id hasn't been found in archive, skipping");
}
nextRequest();
break;
}
}
void Core::RosterItem::appendMessageToArchive(const Shared::Message& msg)
{
const QString& id = msg.getId();
if (id.size() > 0) {
if (msg.getBody().size() > 0) {
switch (archiveState) {
case empty:
if (archive->addElement(msg)) {
archiveState = end;
}
if (!syncronizing) {
requestHistory(-1, id);
}
break;
case beginning:
appendCache.push_back(msg);
if (!syncronizing) {
requestHistory(-1, id);
}
break;
case end:
archive->addElement(msg);
break;
case chunk:
appendCache.push_back(msg);
if (!syncronizing) {
requestHistory(-1, id);
}
break;
case complete:
archive->addElement(msg);
break;
}
} else if (!syncronizing && archiveState == empty) {
requestHistory(-1, id);
}
}
}
void Core::RosterItem::flushMessagesToArchive(bool finished, const QString& firstId, const QString& lastId)
{
unsigned int added(0);
if (hisoryCache.size() > 0) {
added = archive->addElements(hisoryCache);
qDebug() << "Added" << added << "messages to the archive";
hisoryCache.clear();
}
bool wasEmpty = false;
switch (archiveState) {
case beginning:
if (finished) {
archiveState = complete;
archive->addElements(appendCache);
appendCache.clear();
nextRequest();
} else {
emit needHistory("", lastId);
}
break;
case chunk:
if (finished) {
archiveState = end;
archive->addElements(appendCache);
appendCache.clear();
nextRequest();
} else {
emit needHistory("", lastId);
}
break;
case empty:
wasEmpty = true;
archiveState = end;
case end:
if (finished && (added > 0 || !wasEmpty)) {
archiveState = complete;
archive->setFromTheBeginning(true);
}
if (requestedCount != -1) {
QString before;
if (responseCache.size() > 0) {
before = responseCache.front().getId();
} else {
before = requestedBefore;
}
bool found = false;
try {
std::list<Shared::Message> arc = archive->getBefore(requestedCount - responseCache.size(), before);
responseCache.insert(responseCache.begin(), arc.begin(), arc.end());
found = true;
} catch (Archive::NotFound e) {
} catch (Archive::Empty e) {
}
if (!found || requestedCount > responseCache.size()) {
if (archiveState == complete) {
nextRequest();
} else {
emit needHistory(firstId, "");
}
} else {
nextRequest();
}
} else {
if (added != 0) {
nextRequest();
} else {
emit needHistory(firstId, "");
}
}
break;
case complete:
nextRequest();
break;
}
}
void Core::RosterItem::requestFromEmpty(int count, const QString& before)
{
if (syncronizing) {
qDebug("perform from empty didn't work, another request queued");
} else {
if (archiveState != empty) {
qDebug("perform from empty didn't work, the state is not empty");
requestHistory(count, before);
} else {
syncronizing = true;
requestedCount = count;
requestedBefore = "";
hisoryCache.clear();
responseCache.clear();
emit needHistory(before, "");
}
}
}