89 lines
2.3 KiB
C++
89 lines
2.3 KiB
C++
// For license of this file, see <project-root-folder>/LICENSE.md.
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#ifndef FEEDDOWNLOADER_H
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#define FEEDDOWNLOADER_H
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#include <QObject>
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#include <QPair>
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#include "core/message.h"
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class Feed;
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class QThreadPool;
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class QMutex;
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// Represents results of batch feed updates.
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class FeedDownloadResults {
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public:
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QList<QPair<QString, int>> updatedFeeds() const;
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QString overview(int how_many_feeds) const;
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void appendUpdatedFeed(const QPair<QString, int>& feed);
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void sort();
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void clear();
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static bool lessThan(const QPair<QString, int>& lhs, const QPair<QString, int>& rhs);
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private:
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// QString represents title if the feed, int represents count of newly downloaded messages.
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QList<QPair<QString, int>> m_updatedFeeds;
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};
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// This class offers means to "update" feeds and "special" categories.
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// NOTE: This class is used within separate thread.
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class FeedDownloader : public QObject {
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Q_OBJECT
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public:
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// Constructors and destructors.
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explicit FeedDownloader(QObject* parent = 0);
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virtual ~FeedDownloader();
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bool isUpdateRunning() const;
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public slots:
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// Performs update of all feeds from the "feeds" parameter.
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// New messages are downloaded for each feed and they
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// are stored persistently in the database.
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// Appropriate signals are emitted.
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void updateFeeds(const QList<Feed*>& feeds);
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// Stops running update.
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void stopRunningUpdate();
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private slots:
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void oneFeedUpdateFinished(const QList<Message>& messages, bool error_during_obtaining);
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signals:
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// Emitted if feed updates started.
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void updateStarted();
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// Emitted if all items from update queue are
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// processed.
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void updateFinished(FeedDownloadResults updated_feeds);
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// Emitted if any item is processed.
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// "Current" number indicates count of processed feeds
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// and "total" number indicates total number of feeds
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// which were in the initial queue.
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void updateProgress(const Feed* feed, int current, int total);
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private:
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void updateAvailableFeeds();
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void finalizeUpdate();
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QList<Feed*> m_feeds;
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QMutex* m_mutex;
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QThreadPool* m_threadPool;
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FeedDownloadResults m_results;
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int m_feedsUpdated;
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int m_feedsUpdating;
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int m_feedsOriginalCount;
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};
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#endif // FEEDDOWNLOADER_H
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