Archive Cache

Create a caches of database archive views. Esp. gathering data for
actors takes a long time, and I don't see how to optimize the queries.

So write them to a QDataStream. It was much more difficult that it
sounds. Once again I was lost in recursion. Did I mention that I hate
recursion?

The solution:
When writing use the address of the SMTreeItem cast to qint64 as unique
key. On reading build a hash with the address as key and use it to find
the parent of the next item.

I hope that makes sense...

1 files changed, 7 insertions, 0 deletions

diff --git a/archivemodel.h b/archivemodel.h
index 29f10ab..08b4fd3 100644
--- a/archivemodel.h
+++ b/archivemodel.h
@@ -11,6 +11,7 @@
 #include <QHash>
 #include <QSqlDatabase>
 #include <QThread>
+#include <QDataStream>
 
 #include "smtreemodel.h"
 
@@ -50,6 +51,12 @@ class ArchiveModel : public SmTreeModel {
     private:
         bool checkParents(const SmTreeItem *item, const QRegExp &regex, int column) const;
         void emitDatabaseError(const QSqlError &e);
+        void writeCache(int o);
+        void writeRecursive(SmTreeItem *start, QDataStream &stream);
+        void writeItem(SmTreeItem *item, QDataStream &stream);
+        SmTreeItem *readCache(int o);
+        SmTreeItem *readItem(QDataStream &stream) const;
+        const QString cacheFile(int o) const;
         QSqlDatabase mDb;
         QHash<QString, int> mAvailableOrders;
         ArchiveCollector *mCollector;