Implemented data filtering.

core/exprevaluator.cpp

@@ -13,6 +13,7 @@ ExprEvaluator::ExprEvaluator()
 
     m_operations["||"] = [](QVariant left, QVariant right) { return left.toBool() || right.toBool(); };
     m_operations["&&"] = [](QVariant left, QVariant right) { return left.toBool() && right.toBool(); };
+    m_caseSensitive = false;
 }
 #else
 const QMap<QString, std::function<bool(QVariant, QVariant)> > ExprEvaluator::m_operations = {
@@ -30,12 +31,62 @@ const QMap<QString, std::function<bool(QVariant, QVariant)> > ExprEvaluator::m_o
 
 ExprEvaluator::ExprEvaluator()
 {
+    m_caseSensitive = false;
 }
 #endif
 
 
-bool ExprEvaluator::evaluate(const QObject *data, const QString &expression)
+bool ExprEvaluator::evaluate(QObject *object, const QString &exp)
 {
-    return true;
+    if (exp.contains("&&") && exp.contains("||"))
+    {
+        if (exp.indexOf("&&") < exp.indexOf("||"))
+        {
+            return subEval("&&", exp, object);
+        }
+        else
+        {
+            return subEval("||", exp, object);
+        }
+    }
+    else if (exp.contains("&&"))
+    {
+        return subEval("&&", exp, object);
+    }
+    else if (exp.contains("||"))
+    {
+        return subEval("||", exp, object);
+    }
+    else
+    {
+        QVariant value;
+        QString oper;
+        QVariant cond;
+        parseExpr(exp, value, oper, cond, object);
+        return m_operations[oper](value, cond);
+    }
+}
+
+void ExprEvaluator::setCaseSensitive(bool caseSensitive)
+{
+    m_caseSensitive = caseSensitive;
+}
+
+bool ExprEvaluator::subEval(const QString &oper, const QString &expresion, QObject *object)
+{
+    QString ex = expresion.left(expresion.indexOf(oper));
+    QVariant value;
+    QString o;
+    QVariant cond;
+    parseExpr(ex, value, o, cond, object);
+    return m_operations[oper](m_operations[o](value, cond), evaluate(object, expresion.mid(expresion.indexOf(oper) + 2).trimmed()));
+}
+
+void ExprEvaluator::parseExpr(const QString &exp, QVariant &value, QString &oper, QVariant &condition, QObject *object)
+{
+    QStringList expCat = exp.trimmed().split(" ");
+    value = object->property(expCat[0].toStdString().c_str());
+    oper = expCat[1];
+    condition = expCat[2].replace("%20", " ");
 }