Redesign RSS subsystem

src/base/rss/rss_autodownloader.h

@@ -0,0 +1,114 @@
+/*
+ * Bittorrent Client using Qt and libtorrent.
+ * Copyright (C) 2017  Vladimir Golovnev <glassez@yandex.ru>
+ *
+ * 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 2
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ * In addition, as a special exception, the copyright holders give permission to
+ * link this program with the OpenSSL project's "OpenSSL" library (or with
+ * modified versions of it that use the same license as the "OpenSSL" library),
+ * and distribute the linked executables. You must obey the GNU General Public
+ * License in all respects for all of the code used other than "OpenSSL".  If you
+ * modify file(s), you may extend this exception to your version of the file(s),
+ * but you are not obligated to do so. If you do not wish to do so, delete this
+ * exception statement from your version.
+ */
+
+#pragma once
+
+#include <QBasicTimer>
+#include <QHash>
+#include <QList>
+#include <QObject>
+#include <QPointer>
+#include <QSharedPointer>
+
+class QThread;
+class QTimer;
+class Application;
+class AsyncFileStorage;
+struct ProcessingJob;
+
+namespace RSS
+{
+    class Article;
+    class Feed;
+    class Item;
+
+    class AutoDownloadRule;
+
+    class AutoDownloader final: public QObject
+    {
+        Q_OBJECT
+        Q_DISABLE_COPY(AutoDownloader)
+
+        friend class ::Application;
+
+        AutoDownloader();
+        ~AutoDownloader() override;
+
+    public:
+        static AutoDownloader *instance();
+
+        bool isProcessingEnabled() const;
+        void setProcessingEnabled(bool enabled);
+
+        bool hasRule(const QString &ruleName) const;
+        AutoDownloadRule ruleByName(const QString &ruleName) const;
+        QList<AutoDownloadRule> rules() const;
+
+        void insertRule(const AutoDownloadRule &rule);
+        bool renameRule(const QString &ruleName, const QString &newRuleName);
+        void removeRule(const QString &ruleName);
+
+    signals:
+        void processingStateChanged(bool enabled);
+        void ruleAdded(const QString &ruleName);
+        void ruleChanged(const QString &ruleName);
+        void ruleRenamed(const QString &ruleName, const QString &oldRuleName);
+        void ruleAboutToBeRemoved(const QString &ruleName);
+
+    private slots:
+        void process();
+        void handleTorrentDownloadFinished(const QString &url);
+        void handleTorrentDownloadFailed(const QString &url);
+        void handleNewArticle(Article *article);
+
+    private:
+        void timerEvent(QTimerEvent *event) override;
+        void setRule_impl(const AutoDownloadRule &rule);
+        void resetProcessingQueue();
+        void startProcessing();
+        void addJobForArticle(Article *article);
+        void processJob(const QSharedPointer<ProcessingJob> &job);
+        void load();
+        void loadRules(const QByteArray &data);
+        void loadRulesLegacy();
+        void store();
+        void storeDeferred();
+
+        static QPointer<AutoDownloader> m_instance;
+
+        bool m_processingEnabled;
+        QTimer *m_processingTimer;
+        QThread *m_ioThread;
+        AsyncFileStorage *m_fileStorage;
+        QHash<QString, AutoDownloadRule> m_rules;
+        QList<QSharedPointer<ProcessingJob>> m_processingQueue;
+        QHash<QString, QSharedPointer<ProcessingJob>> m_waitingJobs;
+        bool m_dirty = false;
+        QBasicTimer m_savingTimer;
+    };
+}