leaderboard/user_table.cpp at master · Susmita-code007/leaderboard · GitHub

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#include<iostream>
#include<string>
#include "user_table.h"

using namespace std;

void User_table::SHOW_ITEM(User* u)
{
   cout << "Username " << u->get_name() << " email_id " << u->get_email() << " country " << u->get_country() << " score " << u->get_score() << endl;
}

void User_table::SHOW_ALL()
{
   cout << "*********************** USER_TABLE ******************************" << endl;
   cout << " EMAIL_id " << "     NAME    " << "   COUNTRY   " << "   SCORE   " << endl;
   unordered_map <string, User*>::iterator itr;

   for (itr = table.begin(); itr != table.end(); itr++)
   {
      cout << "    " << itr->second->get_email() << "     " << itr->second->get_name() << "   " << itr->second->get_country() << "  " << itr->second->get_score() << endl;
   }
}

void User_table::TOP_K(int k, string country)
{
   priority_queue <User *, vector<User *>, compare_score> pq;
   int count = 0;
   unordered_map <string, User*>::iterator itr;
   for (itr = table.begin(); itr != table.end() && count < k; itr++)
   {
      if (country.empty())
      {
        pq.push(itr->second);
        count++;
      }
      else
      {
        if (itr->second->get_country() == country)
        {
           pq.push(itr->second);
           count++;
        }
      }
   }
   while (itr != table.end())
   {
      if (itr->second->get_score() > pq.top()->get_score() && (country.empty() || (itr->second->get_country() == country)))
      {
         pq.pop();
         pq.push(itr->second);
      }
      itr++;
   }
   cout << "Details of query -  " << endl;

   for (int i = 0; i < count && !pq.empty(); i++)
   {
      User* u = pq.top();
      SHOW_ITEM(u);
      pq.pop();
   }
}

void User_table::UPSERT_USER(string name, string country, string email_id)
{
        User *u = NULL;
        unordered_map <string, User*>:: iterator itr;
        itr = table.find(email_id);
        if (itr != table.end())
        {
        u = itr->second;
        }
        else
        {
                u = new User;
                user_no++;
                u->set_seq(user_no);
        }
        u->set_email(email_id);
        u->set_name(name);
        u->set_country(country);
        table[email_id] = u;
        cout << "name " << "added to the leather board." << endl;
        SHOW_ALL();
}

void User_table::UPSERT_SCORE(string email_id, int score)
{
        User *u = NULL;
        unordered_map <string, User*>:: iterator itr;
        itr = table.find(email_id);
        if (itr != table.end())
        {
            u = itr->second;
        }
        else
        {
                cout << " no user id exists with given mail id" << endl;
                return;
        }
    u->set_score(score);
    cout << "Score of User with name " << u->get_name() << " has been updated" << endl;
    score_table.push_back(make_pair(score, email_id));
    SHOW_ALL();
}