Start of marking of images for selection

database.cpp

@@ -0,0 +1,68 @@
+#include "database.h"
+#include <QStandardPaths>
+#include <QDir>
+#include <QSqlError>
+#include <QDebug>
+
+Database::Database(QObject *parent) : QObject(parent)
+{
+}
+
+bool Database::init()
+{
+    QString path = QStandardPaths::writableLocation(QStandardPaths::AppDataLocation);
+    QDir dir(path);
+
+    m_database = QSqlDatabase::addDatabase("QSQLITE");
+
+    if(!dir.mkpath("."))
+        return false;
+
+    if(m_database.isValid())
+    {
+        m_database.setDatabaseName(dir.absoluteFilePath("database.db"));
+        if(m_database.open())
+        {
+            m_database.exec("CREATE TABLE IF NOT EXISTS files (id INTEGER PRIMARY KEY AUTOINCREMENT, file VARCHAR(255));");
+            QSqlError error = m_database.lastError();
+
+            if(error.type() == QSqlError::NoError)
+            {
+                m_markQuery = QSqlQuery(m_database);
+                m_markQuery.prepare("INSERT INTO files (file) VALUES (?)");
+                m_unmarkQuery = QSqlQuery(m_database);
+                m_unmarkQuery.prepare("DELETE FROM files WHERE file = '?'");
+                return true;
+            }
+
+            qDebug() << error.text();
+        }
+    }
+    return false;
+}
+
+bool Database::mark(QString &filename)
+{
+    m_markQuery.bindValue(0, filename);
+    m_markQuery.exec();
+    return checkError();
+}
+
+bool Database::unmark(QString &filename)
+{
+    m_unmarkQuery.bindValue(0, filename);
+    m_unmarkQuery.exec();
+    return checkError();
+}
+
+bool Database::checkError()
+{
+    QSqlError error = m_database.lastError();
+    if(error.type() == QSqlError::NoError)
+        return true;
+    else
+    {
+        qDebug() << error.text();
+        return false;
+    }
+}