main.cpp

/*Matt Short
CPSC 131
Assignment 8
Purpose: create a program that will use the helper class to read information
from a file, sort, and print the information into another file.*/
#include<iostream>
#include<string>
#include<fstream>
#include"QueueTemplate.h"
#include"movieType.h"
typedef MovieType ItemType;
#include"PQType.h"
using namespace std;

void getMovieInfo(PQType<MovieType>& rankSort);
/*Purpose: read movie information from movie1.txt and sort by rank
Pre: movie1.txt exists and contains movie info
Post: movie info is read from movie1.txt and sorted by rank
*/
void sortByGenre(PQType<MovieType>& rankSort, QueueType<MovieType>& genreSort, QueueType<MovieType>* movieGenres);
/*Purpose: sort movie info by genre
Pre: movie info is already read from file and sorted by rank
Post: movie info is sorted by rank and genre
*/
void printToFile(QueueType<MovieType>* movieGenres);
/*Purpose: print movie info to file
Pre: movie info is sorted by rank and genre
Post: movie info is printed to file
*/

int main()
{

    MovieType movie;//creates an instance of MovieType
    PQType<MovieType> rankSort = PQType<MovieType> (50);//creates an array to hold movie info stored in a queue of size 50
    QueueType<MovieType> movieGenres[8];//creates an array to hold movie genres
    QueueType<MovieType> genreSort;//creates an instance of QueueType which is of type MovieType

    getMovieInfo(rankSort);
    sortByGenre(rankSort, genreSort, movieGenres);
    printToFile(movieGenres);
    return 0;
}

void getMovieInfo(PQType<MovieType>& rankSort)
{
    MovieType movie;//creates an instance of type MovieType
    ifstream readFile;//creates an ifstream variable to read from a file
    bool flag=true;//creates a flag to determine whether or not to continue an operation

    readFile.open("movie1.txt");//opens movie1.txt
    while(flag&&readFile.is_open())//checks while flag=true and if file is open
    {
        flag=movie.readMovieInfo(readFile);//sets flag to rank
        if(flag)//checks if true
            rankSort.Enqueue(movie);//enqueues movie
    }
    readFile.close();//closes movie1.txt
}

void sortByGenre(PQType<MovieType>& rankSort, QueueType<MovieType>& genreSort, QueueType<MovieType>* movieGenres)
{
    MovieType movie;//creates an instance of type MovieType
    int i;//counter variable

    for(i=0;i<8;i++)//loops through all 8 genres
    {
        movieGenres[i]=genreSort;//initiates genre array
    }
    while(!rankSort.IsEmpty())//makes sure rank queue isn't empty
    {
        rankSort.Dequeue(movie);//dequeues movie
        switch(movie.getGenre())//switch statement to put the movies in order according to genre
        {
        case 'A': movieGenres[0].Enqueue(movie);//action
            break;
        case 'C': movieGenres[1].Enqueue(movie);//comedy
            break;
        case 'D': movieGenres[2].Enqueue(movie);//drama
            break;
        case 'H': movieGenres[3].Enqueue(movie);//horror
            break;
        case 'M': movieGenres[4].Enqueue(movie);//mystery
            break;
        case 'R': movieGenres[5].Enqueue(movie);//romance
            break;
        case 'V': movieGenres[6].Enqueue(movie);//adventure
            break;
        case 'W': movieGenres[7].Enqueue(movie);//western
            break;
        }
    }
}

void printToFile(QueueType<MovieType>* movieGenres)
{
    MovieType movie;//creates an instance of type MovieType
    ofstream printFile;//creates an ofstream variable to print to a file
    string Movies[8]={"Action Movies","Comedy Movies","Drama Movies","Horror Movies","Mystery Movies","Romance Movies","Adventure Movies","Western Movies"};//creates string array of genres
    int i;//counting variable
    printFile.open("results.txt");//opens results.txt
    for(i=0;i<8;i++)//loops through all 8 genres
    {
        printFile<<Movies[i]<<endl;//prints out title of genre
        if(movieGenres[i].IsEmpty())//checks if movieGenres is empty
            printFile<<"There are no movies for this genre."<<endl;
        while(!movieGenres[i].IsEmpty())//makes sure that the genre array isn't empty
        {
            movieGenres[i].Dequeue(movie);//dequeues movie
            movie.printMovieInfo(printFile);//prints movie info
        }
        printFile<<endl;
    }
    printFile.close();//closes results.txt
}