duck taped annoying scroll problem, started with local archive

core/archive.cpp

@@ -0,0 +1,71 @@
+/*
+ * <one line to give the program's name and a brief idea of what it does.>
+ * Copyright (C) 2019  Yury Gubich <blue@macaw.me>
+ *
+ * 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 3 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "archive.h"
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <QStandardPaths>
+#include <QDebug>
+
+Core::Archive::Archive(const QString& p_jid, QObject* parent):
+    QObject(parent),
+    jid(p_jid),
+    opened(false),
+    environment(lmdb::env::create()),
+    dbi(0)
+{
+    
+}
+
+Core::Archive::~Archive()
+{
+}
+
+void Core::Archive::open(const QString& account)
+{
+    if (!opened) {
+        QString path(QStandardPaths::writableLocation(QStandardPaths::CacheLocation));
+        path += "/" + account;
+        int state1 = mkdir(path.toStdString().c_str(), S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH);
+        if (state1 != 0 && errno != EEXIST) {
+            qDebug() << "Failed to create account " << account << " database folder";
+            throw 1;
+        }
+        
+        path += "/" + jid;
+        
+        int state2 = mkdir(path.toStdString().c_str(), S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH);
+        if (state2 != 0 && errno != EEXIST) {
+            qDebug() << "Failed to create " << jid.toStdString().c_str() << " database folder in account" << account;
+            throw 1;
+        }
+        
+        environment.set_mapsize(1UL * 1024UL * 1024UL * 1024UL);
+        environment.set_max_dbs(10);
+        environment.open(path.toStdString().c_str(), 0, 0664);
+        
+        lmdb::txn wTrans = lmdb::txn::begin(environment);
+        dbi = lmdb::dbi::open(wTrans, "main", MDB_CREATE);
+        wTrans.commit();
+    }
+}
+
+QString Core::Archive::addElement(const Shared::Message& message)
+{
+    
+}

core/archive.h

@@ -0,0 +1,57 @@
+/*
+ * <one line to give the program's name and a brief idea of what it does.>
+ * Copyright (C) 2019  Yury Gubich <blue@macaw.me>
+ *
+ * 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 3 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef CORE_ARCHIVE_H
+#define CORE_ARCHIVE_H
+
+#include <QObject>
+#include "../global.h"
+#include "lmdb++.h"
+
+namespace Core {
+
+class Archive : public QObject
+{
+    Q_OBJECT
+public:
+    Archive(const QString& jid, QObject* parent);
+    ~Archive();
+    
+    void open(const QString& account);
+    
+    QString addElement(const Shared::Message& message);
+    Shared::Message getElement(const QString& id) const;
+    Shared::Message oldest() const;
+    Shared::Message newest() const;
+    void removeElement(const QString& id);
+    void clear();
+    void modifyElement(const QString& id, const Shared::Message& newValue);
+    unsigned int size() const;
+    
+public:
+    const QString jid;
+    
+private:
+    bool opened;
+    lmdb::env environment;
+    lmdb::dbi dbi;
+};
+
+}
+
+#endif // CORE_ARCHIVE_H