ALL objects can be saved to db now

Park_spot.cpp

@@ -1,9 +1,10 @@
 #include "headers/Park_spot.h"
 
-Park_spot::Park_spot(int id_){
+Park_spot::Park_spot(){
     parked = nullptr;
-    id = id_;
+    id = auto_increment_db() + 1;
     taken = false;
+    save_db();
 }
 
 // clock in en out, calls de juist(in/out) van de customer aan de hand van internal state van taken
@@ -12,10 +13,61 @@ void Park_spot::clock(Customer* c_customer){
         parked = c_customer;
         taken = true;
         parked->clock_in(id);
+        update_db();
     }
     else{
         taken = false;
         parked->clock_out(id);
         parked = nullptr;
+        update_db();
     }
+}
+
+
+// --------------------- db functs
+
+void Park_spot::update_db() {
+    string statement = "UPDATE Park_spot SET taken = '', customer_id  = '' where id = '';";
+    // 29, 48, 62
+    statement.insert(63, to_string(id));
+    if (taken){
+        statement.insert(49, to_string(parked->id));
+        statement.insert(30, "true");
+    }
+    else {
+        statement.insert(49, "NULL");
+        statement.insert(30, "false");
+    }
+    data::db.exec(statement);
+}
+
+
+void Park_spot::save_db() {
+    //(int id, bool taken, int customer_id)
+    string statement{"insert into Park_spot values ( , , );"};
+    // after ( = 28)
+    statement.insert(34, "NULL");
+    statement.insert(32, "false");
+    statement.insert(30, to_string(id));
+    SQLite::Transaction transaction(data::db);
+    data::db.exec(statement);
+    transaction.commit();
+}
+
+void Park_spot::delete_db() {
+    string statement = "delete from Park_spot where id= ;";
+    statement.insert(statement.length() - 2, std::to_string(id));
+    // std::cout << statement;
+    SQLite::Transaction transaction(data::db);
+    data::db.exec(statement);
+    transaction.commit();
+}
+
+int Park_spot::auto_increment_db() {
+    SQLite::Statement max_id(data::db, "select max(id) from Park_spot;");
+    int id = 0;
+    max_id.executeStep();
+    id = max_id.getColumn(0);
+    max_id.reset();
+    return id;
 }