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/**
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This file is part of CWRT package **
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Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). **
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU (Lesser) General Public License as
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published by the Free Software Foundation, version 2.1 of the License.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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(Lesser) General Public License for more details. You should have
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received a copy of the GNU (Lesser) General Public License along
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with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "downloadmanager.h"
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#include "download.h"
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#include "sequentialdownloadmanager.h"
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#include "downloadevent.h"
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#include "clientdownload.h"
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class SequentialDownloadManagerPrivate
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{
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//declare public implementation
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DM_DECLARE_PUBLIC(SequentialDownloadManager);
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public:
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SequentialDownloadManagerPrivate();
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~SequentialDownloadManagerPrivate();
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QList<Download*> m_createdDownloads; // list of downloads which have been created by the client and owns them
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QQueue<Download*> m_downloadsQueue; // queue of downloads scheduled for downloading and owns them
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QList<Download*> m_completedDownloads; // list of downloads which have been completed and owns them
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QList<Download*> m_failedDownloads; // list of failed downloads
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QList<Download*> m_totalDownloads; // total of all the above downloads, but this doesnt own downloads
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};
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SequentialDownloadManagerPrivate::SequentialDownloadManagerPrivate()
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{ }
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SequentialDownloadManagerPrivate::~SequentialDownloadManagerPrivate()
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{
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int createdSize = m_createdDownloads.size();
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for (int i = 0; i < createdSize; i++)
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delete m_createdDownloads[i];
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m_createdDownloads.clear();
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int completedSize = m_completedDownloads.size();
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for (int i = 0; i < completedSize; i++)
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delete m_completedDownloads[i];
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m_completedDownloads.clear();
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int size = m_downloadsQueue.size();
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for (int i = 0; i < size; i++) {
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DownloadState state = (DownloadState)((m_downloadsQueue[i]->getAttribute(DlDownloadState)).toInt());
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if (state == DlInprogress) {
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// pause the download if it is in progress
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m_downloadsQueue[i]->pause();
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} else if (state == DlFailed) {
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// cancel the download if it has failed
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m_downloadsQueue[i]->cancel();
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}
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delete (m_downloadsQueue[i]);
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}
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m_downloadsQueue.clear();
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}
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/*
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constructor
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*/
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SequentialDownloadManager::SequentialDownloadManager()
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{
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DM_INITIALIZE(SequentialDownloadManager);
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}
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/*
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destructor
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*/
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SequentialDownloadManager::~SequentialDownloadManager()
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{
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DM_UNINITIALIZE(SequentialDownloadManager);
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}
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/*
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returns all the current downloads
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*/
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QList<Download*>& SequentialDownloadManager::currentDownloads()
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{
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DM_PRIVATE(SequentialDownloadManager);
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priv->m_totalDownloads.clear();
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for (int i = 0; i < priv->m_completedDownloads.size(); ++i)
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priv->m_totalDownloads.append(priv->m_completedDownloads[i]);
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for (int i = 0; i < priv->m_downloadsQueue.size(); ++i)
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priv->m_totalDownloads.append(priv->m_downloadsQueue[i]);
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for (int i = 0; i < priv->m_createdDownloads.size(); ++i)
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priv->m_totalDownloads.append(priv->m_createdDownloads[i]);
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for (int i = 0; i < priv->m_failedDownloads.size(); ++i)
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priv->m_totalDownloads.append(priv->m_failedDownloads[i]);
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return priv->m_totalDownloads;
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}
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/*
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finds a download provided id if exists
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\a id indicates identifier for download
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*/
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Download* SequentialDownloadManager::findDownload(int dlId)
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{
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DM_PRIVATE(SequentialDownloadManager);
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for (int i = 0; i < priv->m_completedDownloads.size(); ++i) {
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if (priv->m_completedDownloads[i]->id() == dlId)
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return priv->m_completedDownloads[i];
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}
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for (int i = 0; i < priv->m_downloadsQueue.size(); ++i) {
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if (priv->m_downloadsQueue[i]->id() == dlId)
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return priv->m_downloadsQueue[i];
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}
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for (int i = 0; i < priv->m_createdDownloads.size(); ++i) {
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if (priv->m_createdDownloads[i]->id() == dlId)
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return priv->m_createdDownloads[i];
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}
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return 0;
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}
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/*
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cancels all the downloads
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*/
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void SequentialDownloadManager::removeAll()
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{
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DM_PRIVATE(SequentialDownloadManager);
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//traverse the list and delete each download in the list
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for(int i = 0; i < priv->m_downloadsQueue.count(); ) {
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// cancel the download
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priv->m_downloadsQueue[0]->cancel();
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delete (priv->m_downloadsQueue[0]);
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priv->m_downloadsQueue.removeAt(0);
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}
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priv->m_downloadsQueue.clear();
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int createdDownloadsCount = priv->m_createdDownloads.count();
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//traverse the list and delete each download in the list
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for(int i = 0; i < createdDownloadsCount; i++)
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delete (priv->m_createdDownloads[i]);
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priv->m_createdDownloads.clear();
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int completedDownloadsCount = priv->m_completedDownloads.count();
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//traverse the list and delete each download in the list
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for(int i = 0; i < completedDownloadsCount; i++)
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delete (priv->m_completedDownloads[i]);
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priv->m_completedDownloads.clear();
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int failedDownloadsCount = priv->m_failedDownloads.count();
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//traverse the list and delete each download in the list
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for(int i = 0; i < failedDownloadsCount; i++)
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delete (priv->m_failedDownloads[i]);
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priv->m_failedDownloads.clear();
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}
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/*
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cancels and removes the download
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\a dl indicates the download to be canceled and removed
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*/
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void SequentialDownloadManager::removeOne(Download *dl)
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{
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if(!dl)
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return;
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DM_PRIVATE(SequentialDownloadManager);
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if (currentDownloads().contains(dl)) {
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dl->cancel();
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// download might be there in any of the following list
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priv->m_downloadsQueue.removeOne(dl);
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priv->m_createdDownloads.removeOne(dl);
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priv->m_completedDownloads.removeOne(dl);
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delete dl;
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dl = 0;
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}
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}
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/*
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pauses all the downloads which are in progress
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*/
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void SequentialDownloadManager::pauseAll()
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{
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DM_PRIVATE(SequentialDownloadManager);
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if (!priv->m_downloadsQueue.isEmpty()) {
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QQueue<Download*>::iterator i;
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i = priv->m_downloadsQueue.begin();
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DownloadState state = (DownloadState)(((*i)->getAttribute(DlDownloadState)).toInt());
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if ((state == DlInprogress || state == DlStarted))
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dynamic_cast<ClientDownload*>(*i)->pauseDownload();
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}
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}
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/*
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resumes all the downloads which are paused
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*/
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void SequentialDownloadManager::resumeAll()
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{
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DM_PRIVATE(SequentialDownloadManager);
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if (!priv->m_downloadsQueue.isEmpty()) {
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QQueue<Download*>::iterator i;
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i = priv->m_downloadsQueue.begin();
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DownloadState state = (DownloadState)(((*i)->getAttribute(DlDownloadState)).toInt());
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if (state == DlPaused)
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dynamic_cast<ClientDownload*>(*i)->resumeDownload();
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}
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}
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void SequentialDownloadManager::addToSequentialDownload(Download* dl)
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{
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// Here the downloads are added first to a download list. When the downloads are in this list,
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// the client can set some attributes on the download.
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// Later the client has to explicitly call start() on the download after which,
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// download gets added to the downloadsQueue and the download starts.
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DM_PRIVATE(SequentialDownloadManager);
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// set the download type
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ClientDownload* download = dynamic_cast<ClientDownload*>(dl);
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if(download)
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download->attributes().insert(DlDownloadType, (int)Sequential);
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// if the download is already in queue but the prority has been changed
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if( findDownload(dl->id()))
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priv->m_createdDownloads.removeOne(dl);
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DownloadPriority priority = (DownloadPriority)(dl->getAttribute(DlPriority)).toInt();
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if (priority == High) {
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QList<Download*>::iterator i;
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for (i = priv->m_createdDownloads.begin(); i != priv->m_createdDownloads.end(); i++) {
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if ((*i)->getAttribute(DlPriority).toInt() == Low) {
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priv->m_createdDownloads.insert(i, dl);
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return;
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}
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}
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priv->m_createdDownloads.insert(i, dl); // if no low priority download is found then just insert the high priority download
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}
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else
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priv->m_createdDownloads.append(dl);
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}
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void SequentialDownloadManager::addToDownloadQueue(Download* dl)
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{
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DM_PRIVATE(SequentialDownloadManager);
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priv->m_downloadsQueue.append(dl);
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}
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void SequentialDownloadManager::addToCompletedList(Download* dl)
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{
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DM_PRIVATE(SequentialDownloadManager);
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priv->m_completedDownloads.append(dl);
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}
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void SequentialDownloadManager::process(int dlId)
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{
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DM_PRIVATE(SequentialDownloadManager);
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// Start() has been called on a download present in the createdDownloads list. Move that download from the list to the queue
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ClientDownload* dl = dynamic_cast<ClientDownload*>(findDownload(dlId));
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dl->registerEventReceiver(this);
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priv->m_createdDownloads.removeOne(dl); // Once start() is called on download, add it to downloadQueue & remove it from createdDownloads list
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if (priv->m_downloadsQueue.isEmpty()) {
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addToDownloadQueue(dl);
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dl->startDownload();
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return;
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}
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DownloadPriority priority = (DownloadPriority)((dl->getAttribute(DlPriority)).toInt());
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// checking for priority
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if (priority == High) {
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// Add the download before the first low priority item
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QQueue<Download*>::iterator i;
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for (i = priv->m_downloadsQueue.begin(); i != priv->m_downloadsQueue.end(); i++) {
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if ((*i)->getAttribute(DlPriority).toInt() == Low) {
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if (i == priv->m_downloadsQueue.begin()) {
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dynamic_cast<ClientDownload*>(*i)->pauseDownload();
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priv->m_downloadsQueue.insert(i, dl); // low priority dl is in progress so pause it, insert the high priority dl and start it.
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dl->startDownload();
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}
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else {
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// low priority download is present in the queue but it's not the first one as it is not yet started,
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// so there's already a high priority dl in progress. So this high priority dl should just be inserted into the queue.
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priv->m_downloadsQueue.insert(i, dl);
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}
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return;
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}
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}
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priv->m_downloadsQueue.insert(i, dl); // insert the high priority download if there are no low priority downloads in the queue
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}
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else
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addToDownloadQueue(dl); // If priority is low then just append to the queue.
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}
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bool SequentialDownloadManager::event(QEvent *event)
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{
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DM_PRIVATE(SequentialDownloadManager);
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DEventType type = (DEventType)event->type();
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switch(type) {
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case Completed:
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{
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int dlId = ((DownloadEvent*)event)->getId();
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ClientDownload *dl = dynamic_cast<ClientDownload*>(findDownload(dlId));
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addToCompletedList(dl);
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// After adding the download to completed list, remove it from downloadQueue
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priv->m_downloadsQueue.removeOne(dl);
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startNext();
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break;
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}
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case Error:
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{
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int dlId = ((DownloadEvent*)event)->getId();
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ClientDownload *dl = dynamic_cast<ClientDownload*>(findDownload(dlId));
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priv->m_failedDownloads.append(dl);
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priv->m_downloadsQueue.removeOne(dl);
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startNext();
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break;
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}
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default:
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break;
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}
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return true;
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}
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void SequentialDownloadManager::startNext()
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{
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DM_PRIVATE(SequentialDownloadManager);
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QQueue<Download*>::iterator i;
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if (!priv->m_downloadsQueue.isEmpty()) {
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i = priv->m_downloadsQueue.begin();
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DownloadState state = (DownloadState)(((*i)->getAttribute(DlDownloadState)).toInt());
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if (state == DlPaused)
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(*i)->resume();
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else
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dynamic_cast<ClientDownload*>(*i)->startDownload();
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}
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}
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void SequentialDownloadManager::pauseDownload(int dlId)
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{
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DM_PRIVATE(SequentialDownloadManager);
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QQueue<Download*>::iterator i;
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if (!priv->m_downloadsQueue.isEmpty()) {
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i = priv->m_downloadsQueue.begin();
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if (dlId == (*i)->id())
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dynamic_cast<ClientDownload*>(*i)->pauseDownload();
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}
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}
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void SequentialDownloadManager::resumeDownload(int dlId)
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{
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DM_PRIVATE(SequentialDownloadManager);
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QQueue<Download*>::iterator i;
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if (!priv->m_downloadsQueue.isEmpty()) {
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i = priv->m_downloadsQueue.begin();
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if (dlId == (*i)->id())
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dynamic_cast<ClientDownload*>(*i)->resumeDownload();
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}
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}
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void SequentialDownloadManager::cancelDownload(int dlId)
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{
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DM_PRIVATE(SequentialDownloadManager);
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QQueue<Download*>::iterator i;
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if (!priv->m_downloadsQueue.isEmpty()) {
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i = priv->m_downloadsQueue.begin();
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if (dlId == (*i)->id())
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dynamic_cast<ClientDownload*>(*i)->cancelDownload();
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}
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}
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