fixed only handling two fields of a check

goods/goods.cpp

@@ -1,5 +1,9 @@
 #include "goods.h"
 #include <string>
+#include <QString>
+#include <QObject>
+
+Goods::Goods() { }
 
 Goods::Goods(std::string name, double price_per_unit, std::string net_weight, double quantity) :
     name(name), price_per_unit(price_per_unit),
@@ -19,10 +23,53 @@ double Goods::get_price_per_unit() { return this->price_per_unit; }
 
 void Goods::set_name(std::string name) { this->name = name; }
 
+void Goods::set_name(QString name) { this->name = name.toStdString(); }
+
 void Goods::set_quantity(double quantity) { this->quantity = quantity; }
 
 void Goods::set_net_weight(std::string net_weight) { this->net_weight = net_weight; }
 
+void Goods::set_net_weight(QString net_weight) { this->net_weight = net_weight.toStdString(); }
+
 void Goods::set_price_per_unit(double price_per_unit) {
     this->price_per_unit = price_per_unit;
 }
+
+Q_DECLARE_METATYPE(Goods)
+
+QDataStream &operator<<(QDataStream &in, Goods &goods) {
+    in << QString::fromStdString(goods.get_name()) << goods.get_quantity() << QString::fromStdString(goods.get_net_weight()) << goods.get_price_per_unit();
+    return in;
+}
+
+QDataStream &operator>>(QDataStream &out, Goods &goods) {
+    QString name, net_weight;
+    double quantity, price_per_unit;
+    out >> name >> quantity >> net_weight >> price_per_unit;
+    goods.set_name(name);
+    goods.set_quantity(quantity);
+    goods.set_net_weight(net_weight);
+    goods.set_price_per_unit(price_per_unit);
+    return out;
+}
+
+
+QDataStream &operator<<(QDataStream &stream, std::vector<Goods> &goods) {
+    stream << (unsigned int )goods.size();
+    for (Goods &g : goods) {
+        stream << g;
+    }
+    return stream;
+}
+
+QDataStream &operator>>(QDataStream &stream, std::vector<Goods> &goods) {
+    unsigned int size;
+    stream >> size;
+    for (unsigned int i = 0 ; i < size; i ++) {
+        Goods g = Goods();
+        stream >> g;
+        goods.push_back(g);
+    }
+    return stream;
+}
+

goods/goods.h

@@ -2,6 +2,7 @@
 #define GOODS_H
 
 #include <string>
+#include <QDataStream>
 
 class Goods
 {
@@ -10,6 +11,7 @@ class Goods
     std::string net_weight; // will contain values like "5мл" or "10г"
     double price_per_unit;
 public:
+    Goods();
     Goods(std::string name, double quantity, std::string net_weight, double price_per_unit);
     double calculate_total_price();
 
@@ -19,9 +21,16 @@ public:
     double get_price_per_unit();
 
     void set_name(std::string);
+    void set_name(QString);
     void set_quantity(double);
     void set_net_weight(std::string);
+    void set_net_weight(QString);
     void set_price_per_unit(double);
 };
 
+QDataStream &operator<<(QDataStream &, Goods &);
+QDataStream &operator>>(QDataStream &, Goods &);
+
+QDataStream &operator<<(QDataStream &, std::vector<Goods> &);
+QDataStream &operator>>(QDataStream &, std::vector<Goods> &);
 #endif // GOODS_H