main.c

#include "queue.h"
#include "dll.h"
#include "music_player.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

playlist_t* create_buggy_playlist(int n, int s)
{
    playlist_t* pl = create_playlist();
    node_t* start = NULL;
    for (int i = 0; i < n; i++)
    {
        add_song(pl, i, -1);
        if(i == s){
            start = pl->list->head;
        }
    }
    
    pl->list->tail->next = start;

    return pl;
}


int main(){
    int lines;
    FILE *fptr;

    if ((fptr = fopen("input.txt","r")) == NULL){
        printf("Error! opening file");
        exit(1);
    }

    fscanf(fptr,"%d", &lines);
    char operation[20];
    char ops[2];   
    playlist_t* p;
    music_queue_t* mq;
    int id, where, song_id, k, s, n;
    song_t* song;

    for(int i = 0; i < lines; i++){
        fscanf(fptr,"%s", operation);
        if(strcmp(operation, "create_playlist") == 0){
            p = create_playlist();
        }
        else if(strcmp(operation, "delete_playlist") == 0){
            delete_playlist(p);
        }
        else if(strcmp(operation, "create_music_queue") == 0){
            mq = create_music_queue();
        }
        else if(strcmp(operation, "clear_music_queue") == 0){
            clear_music_queue(mq);
        }
        else if(strcmp(operation, "add_song") == 0){
            fscanf(fptr,"%d %d", &id, &where);
            add_song(p, id, where);
        }
        else if(strcmp(operation, "delete_song") == 0){
            fscanf(fptr,"%d", &id);
            delete_song(p, id);
        }
        else if(strcmp(operation, "search_and_play") == 0){
            fscanf(fptr,"%d", &song_id);
            search_and_play(p, song_id);
        }
        else if(strcmp(operation, "play_next") == 0){
            play_next(p, mq);
        }
        else if(strcmp(operation, "play_previous") == 0){
            play_previous(p);
        }
        else if(strcmp(operation, "insert_to_queue") == 0){
            fscanf(fptr,"%d", &id);
            insert_to_queue(mq, id);
        }
        else if(strcmp(operation, "shuffle") == 0){
            fscanf(fptr,"%d", &k);

            shuffle(p, k);
        }
        else if(strcmp(operation, "debug") == 0){
            fscanf(fptr, "%d %d", &n, &s);
            playlist_t* bp = create_buggy_playlist(n, s);
            song = debug(bp);
            if(song != NULL){
                printf("Found cycle at: %d\n", song->data); 
            }
            else{
                printf("No loop!\n");
            }
        }
        else if(strcmp(operation, "display_playlist") == 0){
            display_playlist(p);
        }
        else{
            printf("Invalid Input Format!\n");
            exit(0);
        }
    }

    fclose(fptr); 
    return 0;
}