Refactoring.

src/core/feedsmodelcategory.h

@@ -24,6 +24,16 @@ class FeedsModelCategory : public FeedsModelRootItem {
     explicit FeedsModelCategory(const FeedsModelCategory &other);
     virtual ~FeedsModelCategory();
 
+    inline bool removeItself() {
+      bool result = true;
+
+      foreach (FeedsModelRootItem *child, m_childItems) {
+        result &= child->removeItself();
+      }
+
+      return result;
+    }
+
     // All types of categories offer these getters/setters.
     inline Type type() const {
       return m_type;

src/core/feedsmodelrootitem.h

@@ -57,6 +57,15 @@ class FeedsModelRootItem {
     virtual int countOfUnreadMessages() const;
     virtual int countOfAllMessages() const;
 
+    // This method is used to permanently
+    // "remove" (or "unregister") this item.
+    // This typically removes item and its
+    // "children" (for example messages or child feeds)
+    // from the database.
+    virtual bool removeItself() {
+      return false;
+    }
+
     // Access to children.
     inline QList<FeedsModelRootItem*> childItems() const {
       return m_childItems;

src/core/feedsmodelstandardfeed.cpp

@@ -162,6 +162,12 @@ void FeedsModelStandardFeed::update() {
   updateMessages(messages);
 }
 
+bool FeedsModelStandardFeed::removeItself() {
+  // TODO: pokracovat, vymazat tento standardni
+  // kanal z database a smazat jeho zpravy atp.
+  return false;
+}
+
 void FeedsModelStandardFeed::updateMessages(const QList<Message> &messages) {
   int feed_id = id(), message_id;
   qint64 message_creation_date;

src/core/feedsmodelstandardfeed.h

@@ -24,6 +24,10 @@ class FeedsModelStandardFeed : public FeedsModelFeed {
     // Perform fetching of new messages.
     void update();
 
+    // Removes this standard feed from persistent
+    // storage.
+    bool removeItself();
+
     // Various getters/setters.
     inline QString encoding() const {
       return m_encoding;