fix

src/database.h

@@ -0,0 +1,28 @@
+#pragma once
+#include <string>
+#include <vector>
+#include <unordered_map>
+#include <sstream>
+#include <pgsql/libpq-fe.h>
+#include <iostream>
+#include <memory>
+#include <unordered_map>
+#include <pqxx/pqxx>
+
+class Database
+{
+public:
+    Database(const std::string &conninfo);
+    
+    std::vector<std::map<std::string, std::string>> query(const std::string &sql);
+    void prepare(const std::string &stmtName, const std::string &sql);
+    std::vector<std::unordered_map<std::string,std::string>> execute(
+           const std::string &stmtName, 
+           const std::vector<std::string> &params = {}
+    );
+    bool isOpen() const { return connection_ && connection_->is_open(); }
+    bool isValid() const;
+
+private:
+    std::unique_ptr<pqxx::connection> connection_;
+};