added better database lookup api

src/database/database.hpp

@@ -25,22 +25,43 @@ public:
 
     std::set<std::string> getStrSet(const std::string& sql);
 
+    template <typename T>
+    std::optional<T> getSqlData(sqlite3_stmt* stmt, int i)
+    {
+        if ((stmt == nullptr) || (sqlite3_step(stmt) != SQLITE_ROW))
+            return {}; 
+        
+        if constexpr (std::is_same_v<T, int>) {
+            return sqlite3_column_int64(stmt, i); 
+        }
+        else if constexpr (std::is_same_v<T, std::string>){
+            return reinterpret_cast<const char*>(sqlite3_column_text(stmt, i));
+        }
+    }
+
     template <typename T>
     std::optional<T> get(const std::string sql, const QueryData& data){
         sqlite3_stmt* stmt = bind(sql, data);
-        T ret;
+
+        std::optional<T>  ret = getSqlData<T>(stmt, 0); 
+        sqlite3_finalize(stmt);
+        return ret;
+    }
+
+    template <typename T1, typename T2>
+    std::optional<std::pair<T1, T2>> get(const std::string sql, const QueryData& data){
+        sqlite3_stmt* stmt = bind(sql, data);
         if ((stmt == nullptr) || (sqlite3_step(stmt) != SQLITE_ROW))
             return {}; 
 
-        if constexpr (std::is_same_v<T, int>) {
-            ret = sqlite3_column_int64(stmt, 0); 
-        }
-        else if constexpr (std::is_same_v<T, std::string>){
-            ret = reinterpret_cast<const char*>(sqlite3_column_text(stmt, 0));
-        }
+        std::optional<T1> v1 = getSqlData<T1>(stmt, 0);
+        std::optional<T2> v2 = getSqlData<T2>(stmt, 1);
+
+        if (!v1.has_value() || !v2.has_value())
+            return {};
         
         sqlite3_finalize(stmt);
-        return ret;
+        return std::make_pair(v1.value(), v2.value());
     }
 
     sqlite3_stmt* bind(const std::string sql, const QueryData& data);

src/login/login.cpp

@@ -94,9 +94,9 @@ bool loginUser(const std::string& username, const std::string& password)
     if (!db.open())
         return false;
 
-    auto opt_str = db.get<std::string>(sql, {username});
-    if (opt_str.has_value()) {
-        return verifyHashWithPassword(opt_str.value(), password); 
+    auto opt_pair = db.get<int, std::string>(sql, {username});
+    if (opt_pair.has_value()) {
+        return verifyHashWithPassword(opt_pair.value().second, password); 
     } else {
         return false;
    }