Got rid of ContentManagerModel::startDownload()

Inlined ContentManagerModel::startDownload() into
ContentManager::downloadBook().

src/contentmanager.cpp

@@ -476,12 +476,29 @@ ContentManager::DownloadInfo ContentManager::updateDownloadInfos(QString bookId,
     return result;
 }
 
+namespace
+{
+
+std::shared_ptr<RowNode> getSharedPointer(RowNode* ptr)
+{
+    return std::static_pointer_cast<RowNode>(ptr->shared_from_this());
+}
+
+} // unnamed namespace
+
 void ContentManager::downloadBook(const QString &id, QModelIndex index)
 {
     try
     {
         downloadBook(id);
-        emit managerModel->startDownload(index);
+        auto node = getSharedPointer(static_cast<RowNode*>(index.internalPointer()));
+        const auto newDownload = std::make_shared<DownloadState>();
+        m_downloads[id] = newDownload;
+        node->setDownloadState(newDownload);
+        QTimer *timer = newDownload->getDownloadUpdateTimer();
+        connect(timer, &QTimer::timeout, [=]() {
+                managerModel->updateDownload(id);
+        });
     }
     catch ( const ContentManagerError& err )
     {

src/contentmanagermodel.cpp

@@ -245,24 +245,6 @@ void ContentManagerModel::updateImage(QString bookId, QString url, QByteArray im
     emit dataChanged(index, index);
 }
 
-std::shared_ptr<RowNode> getSharedPointer(RowNode* ptr)
-{
-    return std::static_pointer_cast<RowNode>(ptr->shared_from_this());
-}
-
-void ContentManagerModel::startDownload(QModelIndex index)
-{
-    auto node = getSharedPointer(static_cast<RowNode*>(index.internalPointer()));
-    const auto bookId = node->getBookId();
-    const auto newDownload = std::make_shared<DownloadState>();
-    m_downloads[bookId] = newDownload;
-    node->setDownloadState(newDownload);
-    QTimer *timer = newDownload->getDownloadUpdateTimer();
-    connect(timer, &QTimer::timeout, this, [=]() {
-        updateDownload(bookId);
-    });
-}
-
 void ContentManagerModel::updateDownload(QString bookId)
 {
     const auto download = m_downloads.value(bookId);

src/contentmanagermodel.h

@@ -47,18 +47,15 @@ public: // functions
 
 public slots:
     void updateImage(QString bookId, QString url, QByteArray imageData);
-    void startDownload(QModelIndex index);
     void pauseDownload(QModelIndex index);
     void resumeDownload(QModelIndex index);
     void cancelDownload(QModelIndex index);
+    void updateDownload(QString bookId);
 
 protected: // functions
     bool canFetchMore(const QModelIndex &parent) const override;
     void fetchMore(const QModelIndex &parent) override;
 
-private: // functions
-    void updateDownload(QString bookId);
-
 private: // data
     BookInfoList m_data;
     std::shared_ptr<RowNode> rootNode;