customer can be saved into db

Customer.cpp

@@ -2,29 +2,21 @@
 #include <iostream>
 
 // moet aangepast worden om een verhicle_type toe te voegen
-Customer::Customer(int id_, string name_)
-    : id { id_ }
-    , name { name_ }
-{
-}
+Customer::Customer(int id_, string name_, Verhicle_type verhicle_) : id{id_}, name{name_}, verhicle{verhicle_}, card_code{gen_cardcode()} {}
 
 /*
 creert een park_time object met start time= nu, en voegt t toe aan een vector.
  */
-void Customer::clock_in( int s_id)
-{
+void Customer::clock_in(int s_id) {
     Park_time pt{id, s_id};
     park_instances.push_back(pt);
 }
 
 // edit de laatste park_time obj in de vector zodat de end_time = now.
-void Customer::clock_out(int s_id){
-    park_instances[park_instances.size()-1].clock_out(id, s_id);
-}
-
+void Customer::clock_out(int s_id) { park_instances[park_instances.size() - 1].clock_out(id, s_id); }
 
 // monthly report generation. moet nog een manier vinden om af te bakenen.
-void Customer::gen_monthly(){
+void Customer::gen_monthly() {
     std::cout << "NAME: " << name << " card code: " << card_code << "\n";
     std::cout << "-------------------------------------------------\n";
     for (auto& i : park_instances) {
@@ -32,4 +24,33 @@ void Customer::gen_monthly(){
         std::cout << i;
     }
     std::cout << "-------------------------------------------------\n\n";
-}
+}
+
+void Customer::update_db(SQLite::Database& database) {
+    string statement{"insert into Customer values (, '', '', )"};
+    // after ( = 28)
+    statement.insert(38, std::to_string(int(verhicle)));
+    statement.insert(36, card_code);
+    statement.insert(32, name);
+    statement.insert(29, std::to_string(id));
+    std::cout << statement;
+    SQLite::Transaction transaction(database);
+    database.exec(statement);
+    transaction.commit();
+}
+
+//
+
+// used to generate random card codes that will be used to authenticate users.
+// they represent contactless rf cards that users will use to authenticate
+std::mt19937 mt(time(0));
+std::uniform_int_distribution<int> dist(65, 127);
+
+string Customer::gen_cardcode() {
+    string code;
+    for (int i = 0; i < 20; i++) {
+        char letter = char(dist(mt));
+        code += letter;
+    }
+    return code;
+}