player.cpp

#include "player.h"
#include <ctime>

int randomInt(int  max_int) {
    /** YOU DON'T NEED TO MODIFY THIS */
    srand(time(NULL));
    return (rand() % max_int) + 1;
}

void printInfo(List L) {
    /**
    * PR : menampilkan informasi ID, nama, dan lokasi file
    * YOU DON'T NEED TO MODIFY THIS
    */

    address Q = first(L);
    do {
        cout<<"name    : "<<info(Q).name<<endl
            <<"ID      : "<<info(Q).ID<<endl
            <<"location: "<<info(Q).location<<endl;
        Q = next(Q);
    } while(Q!=first(L));
    cout<<"==============================================="<<endl;
}


void playMusic(address P) {
    /**
    * PR : memainkan lagu yang ditunjuk oleh pointer P
    * YOU DON'T NEED TO MODIFY THIS
    */

    string filename = info(P).location+"/"+info(P).name;
    cout<<"playing "<<filename<<endl;
    PlaySound(TEXT(filename.c_str()), NULL, SND_FILENAME);
    _sleep(500); //delay 0.5 second
}


void shuffleList(List &L) {
    /**
    * PR : mengacak isi (elemen) dari list L
    * FS : isi (elemen) dari list teracak
    */
    //------------- YOUR CODE HERE -------------
    address P = first(L);
    int Count = 0;
    while (P != first(L))
    {
        P = next(P);
        Count = Count + 1;
    }
    while (Count > 0)
    {
        P = first(L);
        int rand = randomInt(Count);
        while (rand != 0)
        {
            P = next(P);
            rand = rand - 1;
        }
        address Q;
        deleteAfter(L, prev(P), Q);
        insertFirst(L,Q);
        Count = Count - 1;
    }
    //----------------------------------------
}

void playRepeat(List &L, int n) {
    /**
    * PR : memainkan seluruh lagu di dalam list
    *      dari lagu pertama hingga terakhir sebanyak n kali
    */
    //------------- YOUR CODE HERE -------------
    address P = first(L);
    int i = 0;
    while (i<n)
    {
        while ( P != first(L))
        {
            cout << " Npw Playing " << info(P).name<<endl;
            playMusic(P);
            P = next(P);
        }
        while (P != first(L))
        {
            i = i + 1;
        }
    }
    //----------------------------------------
}

void deleteMusicByID(List &L, infotype x) {
    /**
    * IS : list L mungkin kosong
    * PR : menerima input user untuk ID lagu yang ingin dihapus
    *      jika ID lagu ditemukan, hapus (deallocate) lagu dari list
    * FS : elemen dengan ID yang dicari dideallocate
    */
    //------------- YOUR CODE HERE -------------
    address P,Q;
    P = findElmByID(L,x);
    P = prev(P);
    if (next(P)==first(L))
    {
        deleteFirst(L,P);
    }
    else if (info(next(P)).ID == x.ID)
    {
        deleteAfter(L,P,Q);
        deallocate(Q);
    }
    //----------------------------------------
}