export sellers as json file

src/core/jsonutil.cpp

@@ -0,0 +1,31 @@
+#include "jsonutil.h"
+
+#include <json/json.h>
+
+#include <fstream>
+
+void JsonUtil::exportSellers(const std::string& filename, Marketplace* market)
+{
+    Json::Value root;
+    std::ofstream file(filename);
+
+    Json::StreamWriterBuilder builder;
+    builder["commentStyle"] = "None";
+    builder["indentation"] = "   ";
+
+    std::unique_ptr<Json::StreamWriter> writer(builder.newStreamWriter());
+
+    root["encoding"] = "UTF-8";
+
+    for (const auto& seller : market->getSellers()) {
+        Json::Value newEntry;
+        newEntry["uuid"] = seller->getUuidAsString();
+        newEntry["seller_no"] = seller->getSellerNo();
+        newEntry["last_name"] = seller->getLastName();
+        newEntry["first_name"] = seller->getFirstName();
+        newEntry["num_offered_articles"] = seller->getFirstName();
+        root["sellers"].append(newEntry);
+    }
+
+    writer->write(root, &file);
+}