File indexing completed on 2024-04-21 04:56:55

 /**
  * SPDX-FileCopyrightText: 2018 Simon Redman <simon@ergotech.com>
  *
  * SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only OR LicenseRef-KDE-Accepted-GPL
  */
 
 #include "requestconversationworker.h"
 
 #include "conversationsdbusinterface.h"
 
 #include <QObject>
 
 RequestConversationWorker::RequestConversationWorker(const qint64 &conversationID, int start, int end, ConversationsDbusInterface *interface)
     : // QObject(interface)
     conversationID(conversationID)
     , start(start)
     , parent(interface)
     , m_thread(new QThread)
 {
     Q_ASSERT(end >= start && "Not allowed to have a negative-length range");
     howMany = end - start;
 
     this->moveToThread(m_thread);
     connect(m_thread, &QThread::started, this, &RequestConversationWorker::handleRequestConversation);
     connect(m_thread, &QThread::finished, m_thread, &QObject::deleteLater);
     connect(this, &RequestConversationWorker::finished, m_thread, &QThread::quit);
     connect(this, &RequestConversationWorker::finished, this, &QObject::deleteLater);
 }
 
 void RequestConversationWorker::handleRequestConversation()
 {
     auto messagesList = parent->getConversation(conversationID);
 
     if (messagesList.isEmpty()) {
         // Since there are no messages in the conversation, it's likely that it is a junk ID, but go ahead anyway
         qCWarning(KDECONNECT_CONVERSATIONS) << "Got a conversationID for a conversation with no messages!" << conversationID;
     }
 
     // In case the remote takes awhile to respond, we should go ahead and do anything we can from the cache
     size_t numHandled = replyForConversation(messagesList, start, howMany);
 
     if (numHandled < howMany) {
         // In this case, the cache wasn't able to satisfy the request fully. Get more.
 
         size_t numRemaining = howMany - numHandled;
         parent->updateConversation(conversationID);
         messagesList = parent->getConversation(conversationID);
         // ConversationsDbusInterface::updateConversation blocks until it sees new messages in the requested conversation
         replyForConversation(messagesList, start + numHandled, numRemaining);
     } else {
         // The cache was able to fully satisfy the request but we need to check that it isn't running dry
 
         size_t numCachedMessages = messagesList.count();
         size_t requestEnd = start + numHandled;
         size_t numRemainingMessages = numCachedMessages - requestEnd;
         double percentRemaining = ((double)numRemainingMessages / numCachedMessages) * 100;
 
         if (percentRemaining < CACHE_LOW_WATER_MARK_PERCENT || numRemainingMessages < MIN_NUMBER_TO_REQUEST) {
             parent->updateConversation(conversationID);
         }
     }
 
     Q_EMIT finished();
 }
 
 size_t RequestConversationWorker::replyForConversation(const QList<ConversationMessage> &conversation, int start, size_t howMany)
 {
     Q_ASSERT(start >= 0);
     // Messages are sorted in ascending order of keys, meaning the front of the list has the oldest
     // messages (smallest timestamp number)
     // Therefore, return the end of the list first (most recent messages)
     size_t i = 0;
     for (auto it = conversation.crbegin() + start; it != conversation.crend(); ++it) {
         if (i >= howMany) {
             break;
         }
         Q_EMIT conversationMessageRead(QDBusVariant(QVariant::fromValue(*it)));
         i++;
     }
 
     return i;
 }
 
 void RequestConversationWorker::work()
 {
     m_thread->start();
 }
 
 #include "moc_requestconversationworker.cpp"