Bit of refactoring, enhanced reporting of state during messages obtaining.

src/core/feeddownloader.cpp

@@ -88,7 +88,7 @@ void FeedDownloader::stopRunningUpdate() {
   m_feeds.clear();
 }
 
-void FeedDownloader::oneFeedUpdateFinished(const QList<Message> &messages) {
+void FeedDownloader::oneFeedUpdateFinished(const QList<Message> &messages, bool error_during_obtaining) {
   QMutexLocker locker(m_mutex);
 
   m_feedsUpdated++;
@@ -106,7 +106,7 @@ void FeedDownloader::oneFeedUpdateFinished(const QList<Message> &messages) {
                      << feed->id() << " in thread: \'"
                      << QThread::currentThreadId() << "\'.";
 
-  int updated_messages = feed->updateMessages(messages);
+  int updated_messages = feed->updateMessages(messages, error_during_obtaining);
 
   /*
   QMetaObject::invokeMethod(feed, "updateMessages", Qt::BlockingQueuedConnection,

src/core/feeddownloader.h

@@ -71,7 +71,7 @@ class FeedDownloader : public QObject {
     void stopRunningUpdate();
 
   private slots:
-    void oneFeedUpdateFinished(const QList<Message> &messages);
+    void oneFeedUpdateFinished(const QList<Message> &messages, bool error_during_obtaining);
 
   signals:
     // Emitted if feed updates started.

src/services/abstract/feed.cpp

@@ -50,7 +50,7 @@ QVariant Feed::data(int column, int role) const {
         case NewMessages:
           return QColor(Qt::blue);
           
-        case Error:
+        case NetworkError:
         case ParsingError:
         case OtherError:
           return QColor(Qt::red);
@@ -146,44 +146,44 @@ void Feed::run() {
                      << customId() << " in thread: \'"
                      << QThread::currentThreadId() << "\'.";
   
-  QList<Message> msgs = obtainNewMessages();
-  emit messagesObtained(msgs);
+  bool error_during_obtaining;
+  QList<Message> msgs = obtainNewMessages(&error_during_obtaining);
+  emit messagesObtained(msgs, error_during_obtaining);
 }
 
-int Feed::updateMessages(const QList<Message> &messages) {
+int Feed::updateMessages(const QList<Message> &messages, bool error_during_obtaining) {
+  QList<RootItem*> items_to_update;
+  int updated_messages = 0;
   bool is_main_thread = QThread::currentThread() == qApp->thread();
 
   qDebug("Updating messages in DB. Main thread: '%s'.", qPrintable(is_main_thread ? "true." : "false."));
   
-  int custom_id = customId();
-  int account_id = getParentServiceRoot()->accountId();
-  bool anything_updated = false;
-  bool ok;
-  QSqlDatabase database = is_main_thread ?
-                            qApp->database()->connection(metaObject()->className(), DatabaseFactory::FromSettings) :
-                            qApp->database()->connection(QSL("feed_upd"), DatabaseFactory::FromSettings);
-  int updated_messages = DatabaseQueries::updateMessages(database, messages, custom_id, account_id, url(), &anything_updated, &ok);
-  
-  if (ok) {
-    if (updated_messages > 0) {
-      setStatus(NewMessages);
+  if (!error_during_obtaining) {
+    bool anything_updated = false;
+    bool ok = true;
+
+    if (!messages.isEmpty()) {
+      int custom_id = customId();
+      int account_id = getParentServiceRoot()->accountId();
+      QSqlDatabase database = is_main_thread ?
+                                qApp->database()->connection(metaObject()->className(), DatabaseFactory::FromSettings) :
+                                qApp->database()->connection(QSL("feed_upd"), DatabaseFactory::FromSettings);
+      updated_messages = DatabaseQueries::updateMessages(database, messages, custom_id, account_id, url(), &anything_updated, &ok);
     }
-    else {
-      setStatus(Normal);
+
+    if (ok) {
+      setStatus(updated_messages > 0 ? NewMessages : Normal);
+      updateCounts(true);
+
+      if (getParentServiceRoot()->recycleBin() != nullptr && anything_updated) {
+        getParentServiceRoot()->recycleBin()->updateCounts(true);
+        items_to_update.append(getParentServiceRoot()->recycleBin());
+      }
     }
-    
-    QList<RootItem*> items_to_update;
-    
-    updateCounts(true);
-    items_to_update.append(this);
-    
-    if (getParentServiceRoot()->recycleBin() != nullptr && anything_updated) {
-      getParentServiceRoot()->recycleBin()->updateCounts(true);
-      items_to_update.append(getParentServiceRoot()->recycleBin());
-    }
-    
-    getParentServiceRoot()->itemChanged(items_to_update);
   }
+
+  items_to_update.append(this);
+  getParentServiceRoot()->itemChanged(items_to_update);
   
   return updated_messages;
 }

src/services/abstract/feed.h

@@ -44,7 +44,7 @@ class Feed : public RootItem, public QRunnable {
     enum Status {
       Normal        = 0,
       NewMessages   = 1,
-      Error         = 2,
+      NetworkError  = 2,
       ParsingError  = 3,
       OtherError    = 4
     };
@@ -83,14 +83,14 @@ class Feed : public RootItem, public QRunnable {
 
   public slots:
     void updateCounts(bool including_total_count);
-    int updateMessages(const QList<Message> &messages);
+    int updateMessages(const QList<Message> &messages, bool error_during_obtaining);
 
   private:
     // Performs synchronous obtaining of new messages for this feed.
-    virtual QList<Message> obtainNewMessages() = 0;
+    virtual QList<Message> obtainNewMessages(bool *error_during_obtaining) = 0;
 
   signals:
-    void messagesObtained(QList<Message> messages);
+    void messagesObtained(QList<Message> messages, bool error_during_obtaining);
 
   private:
     QString m_url;

src/services/owncloud/owncloudfeed.cpp

@@ -108,15 +108,17 @@ OwnCloudServiceRoot *OwnCloudFeed::serviceRoot() const {
   return qobject_cast<OwnCloudServiceRoot*>(getParentServiceRoot());
 }
 
-QList<Message> OwnCloudFeed::obtainNewMessages() {
+QList<Message> OwnCloudFeed::obtainNewMessages(bool *error_during_obtaining) {
   OwnCloudGetMessagesResponse messages = serviceRoot()->network()->getMessages(customId());
 
   if (serviceRoot()->network()->lastError() != QNetworkReply::NoError) {
-    setStatus(Feed::Error);
+    setStatus(Feed::NetworkError);
+    *error_during_obtaining = true;
     serviceRoot()->itemChanged(QList<RootItem*>() << this);
     return QList<Message>();
   }
   else {
+    *error_during_obtaining = false;
     return messages.messages();
   }
 

src/services/owncloud/owncloudfeed.h

@@ -45,7 +45,7 @@ class OwnCloudFeed : public Feed {
     OwnCloudServiceRoot *serviceRoot() const;
 
   private:
-    QList<Message> obtainNewMessages();
+    QList<Message> obtainNewMessages(bool *error_during_obtaining);
 };
 
 #endif // OWNCLOUDFEED_H

src/services/standard/standardfeed.cpp

@@ -430,7 +430,7 @@ bool StandardFeed::editItself(StandardFeed *new_feed_data) {
   return true;
 }
 
-QList<Message> StandardFeed::obtainNewMessages() {
+QList<Message> StandardFeed::obtainNewMessages(bool *error_during_obtaining) {
   QByteArray feed_contents;
   int download_timeout = qApp->settings()->value(GROUP(Feeds), SETTING(Feeds::UpdateTimeout)).toInt();
   m_networkError = NetworkFactory::downloadFeedFile(url(), download_timeout, feed_contents,
@@ -438,11 +438,13 @@ QList<Message> StandardFeed::obtainNewMessages() {
 
   if (m_networkError != QNetworkReply::NoError) {
     qWarning("Error during fetching of new messages for feed '%s' (id %d).", qPrintable(url()), id());
-    setStatus(Error);
+    setStatus(NetworkError);
+    *error_during_obtaining = true;
     return QList<Message>();
   }
   else if (status() != NewMessages) {
     setStatus(Normal);
+    *error_during_obtaining = false;
   }
 
   // Encode downloaded data for further parsing.
@@ -507,4 +509,6 @@ StandardFeed::StandardFeed(const QSqlRecord &record) : Feed(nullptr) {
 
   setAutoUpdateType(static_cast<Feed::AutoUpdateType>(record.value(FDS_DB_UPDATE_TYPE_INDEX).toInt()));
   setAutoUpdateInitialInterval(record.value(FDS_DB_UPDATE_INTERVAL_INDEX).toInt());
+
+  m_networkError = QNetworkReply::NoError;
 }

src/services/standard/standardfeed.h

@@ -142,7 +142,7 @@ class StandardFeed : public Feed {
     void fetchMetadataForItself();
 
   private:
-    QList<Message> obtainNewMessages();
+    QList<Message> obtainNewMessages(bool *error_during_obtaining);
 
   private:
     bool m_passwordProtected;

src/services/tt-rss/ttrssfeed.cpp

@@ -156,7 +156,7 @@ bool TtRssFeed::editItself(TtRssFeed *new_feed_data) {
   }
 }
 
-QList<Message> TtRssFeed::obtainNewMessages() {
+QList<Message> TtRssFeed::obtainNewMessages(bool *error_during_obtaining) {
   QList<Message> messages;
   int newly_added_messages = 0;
   int limit = MAX_MESSAGES;
@@ -167,7 +167,8 @@ QList<Message> TtRssFeed::obtainNewMessages() {
                                                                                  true, true, false);
 
     if (serviceRoot()->network()->lastError() != QNetworkReply::NoError) {
-      setStatus(Feed::Error);
+      setStatus(Feed::NetworkError);
+      *error_during_obtaining = true;
       serviceRoot()->itemChanged(QList<RootItem*>() << this);
       return QList<Message>();
     }
@@ -181,6 +182,7 @@ QList<Message> TtRssFeed::obtainNewMessages() {
   }
   while (newly_added_messages > 0);
 
+  *error_during_obtaining = false;
   return messages;
 }
 

src/services/tt-rss/ttrssfeed.h

@@ -47,7 +47,7 @@ class TtRssFeed : public Feed {
     bool removeItself();
 
   private:
-    QList<Message> obtainNewMessages();
+    QList<Message> obtainNewMessages(bool *error_during_obtaining);
 };
 
 #endif // TTRSSFEED_H