Ranking.cc

#include "Ranking.h"

#include <iostream>
#include <vector>

#include "ServerApplication.h"
#include "StringManip.h"

using namespace std;
using namespace TP1;


void Ranking::clear() {
    if (LOGGING) {
        cout << "Clearing ranking" << endl;
    }
    _rankingContainer.clear();
}


string Ranking::insert(string s) {

    if (LOGGING) {
        cout << "Inserting message into ranking" << endl;
    }

    multiset<unsigned long long>::iterator it;
    unsigned int position = 0;

    //Converts string to unsigned...
    //Assumes it's safe!
    unsigned long long raceTime = convertMessageToTime(s);
    
    //keeps position of newly inserted element
    it = _rankingContainer.insert(raceTime);

    //clever trick to retrieve the position:
    //subtract the new element from beginning
    position =  distance(_rankingContainer.begin(), it);

    //Adds 1 because positions start at 1 (not 0)
    return  to_string(position+1);

}

//Given message string, will return time in MILLISECONDS
unsigned long long Ranking::convertMessageToTime(string message) {

    //Local and helper variables
    int numHours = 0, numMinutes = 0, numSeconds = 0, numMiliSeconds = 0, number = 0;
    size_t index = 0;
    string word = "";

    vector<string> words = getWordsFromString(message);

    //Iterates through each word, extracting possible values
    for (unsigned ii=0; ii<words.size();++ii) {
        word = words[ii];

        //The below function WILL BREAK THE PROGRAM is user provides wrong input
        number = stoi(word, &index); /* index will store the amount of characters processed */

        //Input doesn't have time identifier right after it...
        if (word.size() < index+1) {

            //There are no more words, we'll just return the number
            if (ii == words.size() - 1) {
                cout << "WARNING: Something is wrong with input but I'm taking it anyway..." << endl;
                return number;
            }

            //Is the next word a letter?
            word = words[++ii];
            if (isalpha(word[0])) {

                //Good,we'll keep a reference to it in the word and index variable and use it in the below
                //switch
                index = 0;
            } else {

                //If it isn't we'll just return the number again
                cout << "WARNING: Something is wrong with input but I'm taking it anyway..." << endl;
                return number;
            }
        }

        switch (word[index]) { /* now we grab the letter right after the number */
            case 'h':
            case 'H':
                numHours = number;
                break;

            case 's':
            case 'S':
                numSeconds = number;
                break;

            case 'm':
            case 'M':
                if (word.size() < ++index + 1) { /* minutes case, because this is last character */
                    numMinutes = number;
                } else { /* miliseconds case, because we still have one character left (assumes it's an s)) */
                    numMiliSeconds = number;    
                }
                break;
        }
    }

    //Returns value in miliseconds

    return (numHours * 3600000ULL) + (numMinutes * 60000ULL) + (numSeconds * 1000ULL) + (numMiliSeconds);
}