almost done

CMakeLists.txt

@@ -23,8 +23,8 @@ add_executable(park
         headers/Park_spot.h
         Park_time.cpp
         headers/Park_time.h
-        # Query.cpp
-        # headers/Query.h
+        Query.cpp
+        headers/Query.h
  )
 
 

Park_spot.cpp

@@ -7,8 +7,8 @@ Park_spot::Park_spot()
     save_db();
 }
 
-Park_spot::Park_spot(int id_, bool taken_, Customer& parked)
-    : parked_customer{parked.id},
+Park_spot::Park_spot(int id_, bool taken_, int parked)
+    : parked_customer{parked},
       id{id_},
       taken{taken_} // TODO: think about how init parked?
 {}

Query.cpp

@@ -0,0 +1,94 @@
+#include "headers/Query.h"
+
+
+vector<Park_time> query_parktimes_for_customer(int cid) {
+    /*
+    This is needed to initialize the park_instances for the customer constructor
+    that is supposed to create a customer from data in the db.
+    This should not be called on on it's own outside query_customer();
+     */
+    vector<Park_time> park_times;
+
+    SQLite::Statement query(data::db,
+                            "SELECT * FROM Park_time WHERE customer_id = ?;");
+    query.bind(1, cid);
+    while (query.executeStep()) {
+        int id = query.getColumn(0);
+        int spot_id = query.getColumn(2);
+        int start = query.getColumn(3);
+        int duration = query.getColumn(5);
+
+        Park_time result{id, cid, spot_id, start, duration};
+        park_times.push_back(result);
+    }
+    query.reset();
+    return park_times;
+}
+
+
+//--------------------------------------------- customers
+
+
+vector<Customer> query_customer_with_name(string name) {
+    /*
+    We use this instead of plain customers because:
+    1. no error handling needed here if there are no customers
+    2. multiple customers could be returned with the same name.
+     */
+    vector<Customer> result;
+    SQLite::Statement query(
+        data::db,
+        "SELECT id, name, password, verhicle FROM Customer WHERE name = ?;");
+    query.bind(1, name);
+    while (query.executeStep()) {
+        int id = query.getColumn(0);
+        string name_ = query.getColumn(1);
+        string password = query.getColumn(2);
+        int verhicle = query.getColumn(3); // cast to verhicle
+        vector<Park_time> park_instances = query_parktimes_for_customer(id);
+        result.push_back(Customer{
+            id, name_, password, Verhicle_type(verhicle), park_instances});
+    }
+    return result;
+}
+
+Customer query_customer_with_id(int id) {
+    /*  do not call this function if you are not certain a customer with this id
+    exists.
+    // the only legitimate caller of this function is query_parkspot_x
+    // there is no error handling in this function
+    // for when this function doesn't find the customer with this id !!!!
+    */
+
+    SQLite::Statement query(data::db, "SELECT * FROM Customer WHERE id = ?;");
+    query.bind(1, id);
+    while (query.executeStep()) {
+        string name = query.getColumn(1);
+        string password = query.getColumn(2);
+        int verhicle = query.getColumn(3); // cast to verhicle
+        vector<Park_time> park_instances = query_parktimes_for_customer(id);
+        Customer result{
+            id, name, password, Verhicle_type(verhicle), park_instances};
+        // DEBUG
+        // cout << "{" << result.id << "," <<result.password <<"," << int(verhicle) << "}\n";
+        return result;
+    }
+}
+
+
+// -------------- paroking spots
+
+vector<Park_spot>  query_all_parking_spots() {
+    vector<Park_spot> spots;
+    SQLite::Statement query(data::db, "SELECT * FROM Park_spot WHERE id > 2;");
+    // query.bind(1, 2);
+    while (query.executeStep()) {
+        int id = query.getColumn(0);
+        int taken = query.getColumn(1);
+        int cid = query.getColumn(2);
+        // park_customers.push_back(query_customer_with_id(cid));
+        spots.push_back({id, taken, cid});
+    }
+    return spots;
+}
+

headers/Customer.h

@@ -46,10 +46,5 @@ class Customer {
     int auto_increment_db();
 };
 
-static vector<Customer> park_customers; 
-// save the customers that are parked in here
-// parking_spot uses pointers, so it's better to save the parked customers here
-// where we know they'll be destroyed at the end of this scope, instead of too
-// early and end up with dangling pointers
 
 #endif // CUSTOMER_H

headers/Park_spot.h

@@ -1,5 +1,8 @@
-#include "Customer.h"
+#ifndef PARK_SPOT_H
+#define PARK_SPOT_H
+#pragma once
 
+#include "Customer.h"
 /*
 db representation:
 int id not null
@@ -16,7 +19,7 @@ class Park_spot {
     bool taken;
     int parked_customer;
     Park_spot();
-    Park_spot(int id_, bool taken_, Customer& parked);
+    Park_spot(int id_, bool taken_, int parked);
     void clock(Customer& c_customer);
 
   private:
@@ -25,5 +28,4 @@ class Park_spot {
     void delete_db();
     int auto_increment_db();
 };
-
-static vector<Park_spot> parking_spots; // to save the parking spots in memory
+#endif // CUSTOMER_H

headers/Query.h

@@ -0,0 +1,21 @@
+#ifndef QUERY_H
+#define QUERY_H
+#pragma once
+
+#include "Park_spot.h"
+
+#include <array>
+
+vector<Park_time> query_parktimes_for_customer(int cid);
+
+vector<Customer> query_customer_with_name(string name);
+Customer query_customer_with_id(int id);
+
+vector<Park_spot> query_all_parking_spots(); // used for initializing the parking spots at start of the program
+
+static vector<Park_spot> parking_spots = query_all_parking_spots(); // to save the parking spots in memory
+static vector<Customer> park_customers; 
+// save the customers that are parked in here
+
+
+#endif // CUSTOMER_H

headers/data.h

@@ -6,6 +6,7 @@
 
 namespace data {
 SQLite::Database start_db();
+
 static SQLite::Database db = start_db();
 
 } // namespace data

main.cpp

@@ -1,4 +1,4 @@
-#include "headers/Park_spot.h"
+#include "headers/Query.h"
 
 #include <chrono>
 #include <thread>
@@ -30,6 +30,13 @@ a wait function where 1 sec represents 1 hour irl.
 }
 
 int main() {
+    // Customer sagar = query_customer_with_name("stefan udit")[0];
+    Customer sagar = query_customer_with_id(2);
+    cout << sagar.id << "," << sagar.name << "," << sagar.password;
+    // cout << parking_spots.size();
 
+    // for (auto i : parking_spots){
+    //     cout << i.id << "," << i.parked_customer;
+    // }
 
 }