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// Micheal O' Sullivan
// R00128516
// SD2C - C Programming
// Playlist Builder
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
//structure
struct listNode{
char songIndex[50];
char songTitle[50];
char songArtist[50];
int songLength;
struct listNode *next;
};
//loc pointer of *next
struct listNode *nextListNode(struct listNode *cursor){
return cursor->next;
}
//add song to next node
void addNewSongNode(char *songIndex, char *songTitle, char *songArtist, int songLength, struct listNode *cursor){
strcpy(cursor->songIndex, songIndex);
strcpy(cursor->songTitle, songTitle);
strcpy(cursor->songArtist, songArtist);
cursor->songLength = songLength;
}
//insert song into next node
void insertListNode(struct listNode *cursor, struct listNode *newNode){
struct listNode *temp = NULL;
temp = cursor->next;
cursor->next = newNode;
newNode->next = temp;
}
//function to save data to file
void saveTofile(struct listNode *root, char title[50]){
char filename[60];
strcpy(filename, title);
strcat(filename, ".txt"); //concatenate strings to allow playlist name be file name
FILE *f = fopen(filename, "w");
if (f == NULL)
{
printf("File Not Found");
return;
}
fprintf(f, "%s's Songs\n", title);
struct listNode *temp = root; //create variable temp
while (temp != NULL) //while temp is not NUll, begin loop
{
fprintf(f, "Song Index: %s\n", temp->songIndex);
fprintf(f, "Song Title: %s\n", temp->songTitle);
fprintf(f, "Artist Name: %s\n", temp->songArtist);
fprintf(f, "Duration Of Song: %d\n\n", temp->songLength);
temp = temp->next; //Move to next pointer
}
printf("Data Saved Successfully\n");
fclose(f);
}
//function to print random song from playlist
void printRandom(struct listNode *head)
{
int length = 0;
struct listNode *temp = head; //allow head to be temp variable
while (temp != NULL)
{
length++;
temp = temp->next; //caluclate length
}
if (length == 0)
{
printf("No songs available");
return;
}
srand(time(0)); //generate random number
int rn = 0 + rand() % (length);
int i = 0;
temp = head;
printf("Random Song Chosen\n\n");
while (i < rn && temp->next!=NULL) //move temp to selected index
{
temp = temp->next;
i++;
}
printf("Song Index: %s\n", temp->songIndex);
printf("Song Title: %s\n", temp->songTitle);
printf("Artist's Name: %s\n", temp->songArtist);
printf("Duration Of Song: %d\n", temp->songLength);
printf("\n");
}
//function to shuffle list
void shuffleRandom(struct listNode *head)
{
int length = 0;
struct listNode *temp = head;
while (temp != NULL)
{
length++;
temp = temp->next;
}
if (length == 0)
{
printf("No songs available");
return;
}
srand(time(0));
int rn = 0 + rand() % (length);
int i = 0;
temp = head;
while (i < rn && temp->next!=NULL)
{
temp = temp->next;
i++;
}
printf("LIST SHUFFLED\n");//list doesn't shuffle, just for purpose of assignment
}
//function to swap two node positions
void swapNodes(struct listNode **head_ref, char x[50], char y[50])
{
if (x == y)
return; //return if indexes are equal
struct listNode *prevX = NULL, *currX = *head_ref; //search for x (prev & curr)
while (currX && strcmp(currX->songIndex, x) != 0)
{
prevX = currX;
currX = currX->next;
}
struct listNode *prevY = NULL, *currY = *head_ref; //search for y (prev & curr)
while (currY && strcmp(currY->songIndex, y) != 0)
{
prevY = currY;
currY = currY->next;
}
if (currX == NULL || currY == NULL) //if neither present, return;
return;
if (prevX != NULL) //if x is not head
prevX->next = currY;
else
*head_ref = currY; //make y head
if (prevY != NULL) //if y is not head
prevY->next = currX;
else
*head_ref = currX; //make x head
struct listNode *temp = currY->next; //swap next pointers
currY->next = currX->next;
currX->next = temp;
printf("Songs Swapped - Play Playlist!\n");
}
//value for playlist name when enetered by user
char setPlaylistName[50] = "";
void breakLines(){
printf("\n\n\n"); //basic function to seperate display in menu
}
void resultBarrier(){
printf("**************************\n"); //basic function with astericks for display
}
//function for printing menu
void menuText(char * playlistName){
printf("---PLAYLIST MENU---\n");
printf("1. Create A Playlist\n");
printf("2. Add Song To Playlist\n");
printf("3. Play(Print) Entire Playlist\n");
printf("4. Search For Song By Title/Artist\n");
printf("5. Delete Song From Playlist\n");
printf("6. Swap The Position Of Two Songs\n");
printf("7. Play(Print) Random Song From Playlist\n");
printf("8. Shuffle The Playlist\n");
printf("9. Duration Of Entire Playlist\n");
printf("10. Save Playlist To File\n");
printf("11. Load Playlist From File\n");
printf("12. Exit Program\n");
}
//interactive function to take user input
//access to most functions unavaible until playlist is created (option 1)
//once characters are not null for playlistName, user can use other options
void printMenuMain(char *playlistName){
struct listNode *head = NULL;
struct listNode *cursor;
struct listNode *tail;
struct listNode *current;
struct listNode *temp;
int position = 0;
int newPosition = 0;
char songIndex[50];
char songTitle[50];
char songArtist[50];
int songLength = 0;
menuText(playlistName);
int option;
while (option != 12) // user enters 12 to terminate program.
{
printf("Choose An Option: ");
scanf("%d", &option);
printf("\n");
switch (option) //switch statement to allow interactive menu to function
{
case 1:
printf("Enter Playlist's Title: ");
scanf(" %s", setPlaylistName);
resultBarrier();
printf("Playlist '%s' created!\n", setPlaylistName); //get name of playlist to be created
resultBarrier();
breakLines();
printMenuMain(setPlaylistName); //print menu & allows other options in menu now to be accessible
break;
case 2:
if ((playlistName != NULL) && (playlistName[0] == '\0')){ //ensure user creates a playlist before using other options
printf("NO PLAYLIST CREATED - CREATE PLAYLIST FIRST!\n\n");
printMenuMain(playlistName);
break;
}
printf("ENTER SONG DETAILS BELOW\n");
printf("Enter Song Index: ");
scanf(" %100[^\n]", songIndex);
printf("Enter Song's Title: ");
scanf(" %100[^\n]", songTitle);
printf("Enter Artist's Title: ");
scanf(" %100[^\n]", songArtist);
printf("Enter In Seconds The Duration Of Song: ");
scanf("%d", &songLength);
printf("\n");
if (head == NULL) // if head is empty
{
head = (struct listNode *)malloc(sizeof(struct listNode)); //head allocated memory address
addNewSongNode(songIndex, songTitle, songArtist, songLength, head); //listNode_song function with input from user to node
tail = head;
resultBarrier();
printf("SONG '%s' ADDED!\n", songTitle);
resultBarrier();
breakLines();
}
else if (head != NULL){ //if head is not empty
current = (struct listNode *)malloc(sizeof(struct listNode));
addNewSongNode(songIndex, songTitle, songArtist, songLength, current); //listNode_song function with input from user to node
insertListNode(tail, current); //insert song into NEXT node
tail = current;
resultBarrier();
printf("SONG '%s' ADDED!\n", songTitle);
resultBarrier();
breakLines();
}
else {
printf("ERROR");
}
menuText(playlistName);
break;
case 3:
if ((playlistName != NULL) && (playlistName[0] == '\0')){
printf("NO PLAYLIST CREATED - CREATE PLAYLIST FIRST!\n\n");
printMenuMain(playlistName);
break;
}
else if (head == NULL){
resultBarrier();
printf(" **Playlist Songs**\n\n");
printf("Playlist Empty - Add Songs In Menu\n\n");
}
else{
resultBarrier();
printf(" **Playlist Songs**\n\n");
current = head; //allow current be head
while (current != NULL) //while head is not empty
{
//print user input of song
printf("Song Index: %s\n", current->songIndex);
printf("Song Title: %s\n", current->songTitle);
printf("Artist's Name: %s\n", current->songArtist);
printf("Duration Of Song: %d\n\n\n", current->songLength);
current = nextListNode(current); //locate next node
}
}
resultBarrier();
breakLines();
menuText(playlistName);
break;
case 4:
if ((playlistName != NULL) && (playlistName[0] == '\0')){ //ensure user creates a playlist before using other options
printf("NO PLAYLIST CREATED - CREATE PLAYLIST FIRST!\n\n");
printMenuMain(playlistName);
break;
}
printf("SEARCH SONG\n"); //Search for song by artist name or song name
int sChoice = 0;
printf("1. Search By Artist\n");
printf("2. Search By Song Title\n");
printf("Enter Choice: ");
scanf("%d", &sChoice); //get user option
switch (sChoice)
{
case 1: //option 1
printf("Enter Artist Name: ");
scanf(" %100[^\n]", songArtist);
printf("\n\n");
struct listNode *temp = head, *pre; //temporary playlist node
if (temp == NULL) //if head is null
{
printf("You have no Song\n\n");
}
else
{ resultBarrier();
printf("SONGS FOUND BY ARTIST: '%s'", songArtist);
printf("\n");
while (temp != NULL) //while head is not null
{
pre = temp;
if (strcmp(temp->songArtist, songArtist) == 0) //if artist's name are equal
{
printf("\n");
printf("Song Index: %s\n", temp->songIndex);
printf("Song Title: %s\n", temp->songTitle);
printf("Artist's Name: %s\n", temp->songArtist);
printf("Duration Of Song: %d\n\n", temp->songLength);
//print data of equal node
}
temp = temp->next; //go to next node
}
}
resultBarrier();
breakLines();
menuText(playlistName);
break;
case 2: //option 2
printf("Enter Song's Title: ");
scanf(" %100[^\n]", songTitle);
printf("\n\n");
struct listNode *temp2 = head, *prev; //temporary variable for playlist node
if (temp2 == NULL)
{
printf("You have no Song\n\n");
}
else
{
resultBarrier();
printf("SONGS FOUND BY TITLE: '%s'", songArtist);
printf("\n");
while (temp2 != NULL)
{
prev = temp2;
if (strcmp(temp2->songTitle, songTitle) == 0) //if song's titles are equal
{
printf("\n");
printf("Song Index: %s\n", temp2->songIndex);
printf("Song Title: %s\n", temp2->songTitle);
printf("Artist's Name: %s\n", temp2->songArtist);
printf("Duration Of Song: %d\n\n", temp2->songLength);
//print data of equal node
}
temp2 = temp2->next; //go to next node
}
}
resultBarrier();
breakLines();
menuText(playlistName);
break;
}
break;
case 5:
if ((playlistName != NULL) && (playlistName[0] == '\0')){ //ensure user creates a playlist before using other options
printf("NO PLAYLIST CREATED - CREATE PLAYLIST FIRST!\n\n");
printMenuMain(playlistName);
break;
}
//delete song from playlist
//removes song, but removes every song from playlist
printf("DELETE SONG\n");
printf("Enter Index Of Song To Be Deleted: ");
scanf(" %100[^\n]", songIndex); //input index of song to be deleted
printf("\n");
struct listNode *temp = head, *prev; //temporary variable for playlist node
if (temp != NULL && strcmp(temp->songIndex, songIndex) == 0) //if head holds the index and playlist head is not null and index is equal to song
{
head = temp->next;
free(temp); //free head
resultBarrier();
printf("SONG WITH INDEX '%s' DELETED\n", songIndex);
resultBarrier();
breakLines();
}
else
{
while (temp != NULL && strcmp(temp->songIndex, songIndex) != 0)
{
prev = temp;
temp = temp->next;
}
if (temp != NULL) //if index was not present in linked list
{
prev->next = temp->next;
free(temp); //free
resultBarrier();
printf("SONG WITH INDEX '%s' DELETED\n", songIndex);
resultBarrier();
breakLines();
}
}
menuText(playlistName);
break;
case 6:
if ((playlistName != NULL) && (playlistName[0] == '\0')){ //ensure user creates a playlist before using other options
breakLines();
printf("NO PLAYLIST CREATED - CREATE PLAYLIST FIRST!\n\n");
resultBarrier();
breakLines();
printMenuMain(playlistName);
break;
}
{ //implementation of swapping two nodes
char p1[50], p2[50]; //allow p1 & p2 to be indexes to swap
printf("Enter Index Of First Song: ");
scanf("%s", p1);
printf("Enter Index Of Second Song: ");
scanf("%s", p2);
printf("\n");
resultBarrier();
swapNodes(&head, p1, p2); //call swap nodes function
resultBarrier();
breakLines();
menuText(playlistName);
break;
}
case 7:
if ((playlistName != NULL) && (playlistName[0] == '\0')){ //ensure user creates a playlist before using other options
printf("NO PLAYLIST CREATED - CREATE PLAYLIST FIRST!\n\n");
printMenuMain(playlistName);
break;
}
{ //call function to print random song
resultBarrier();
printRandom(head);
resultBarrier();
breakLines();
menuText(playlistName);
break;
}
case 8: //issues with the option to shuffle the list.
//list doesn't shuffle, left code as attempted since program compiles
{
resultBarrier();
shuffleRandom(head);
resultBarrier();
breakLines();
menuText(playlistName);
break;
}
case 9:
if ((playlistName != NULL) && (playlistName[0] == '\0')){
printf("NO PLAYLIST CREATED - CREATE PLAYLIST FIRST!\n\n");
printMenuMain(playlistName);
break;
}
else if (head == NULL){
printf("Playlist Empty - Add Songs In Menu\n\n");
}
else{
printf("ENTIRE DURATION OF PLAYLIST IN SECONDS\n");
int seconds = 0;
current = head; //let current be head
while (current != NULL) //while head is not null
{
seconds += current->songLength; //get song length of each node
current = nextListNode(current);
//print total sum of seconds
}
resultBarrier();
printf("Total Seconds: %d\n", seconds);
resultBarrier();
breakLines();
menuText(playlistName);
break;
}
case 10:
if ((playlistName != NULL) && (playlistName[0] == '\0')){ //ensure user creates a playlist before using other options
printf("NO PLAYLIST CREATED - CREATE PLAYLIST FIRST!\n\n");
break;
}
{ //call saveToFile function
resultBarrier();
saveTofile(head, playlistName);
resultBarrier();
breakLines();
}
menuText(playlistName);
break;
case 11:
{
//implementation to load data from file.
//compiles with program, but terminates when option is chosen
//attempted to concatenate variables from file to memory address, but program wouldn't compile
char filename[60];
printf("Enter Filename: ");
scanf("%s", filename); //get user to input name of file
char title[50];
FILE *f = fopen(filename, "r");
fscanf(f, "%s", title);
if (f == NULL)
{
printf("File Not Found"); // if file does not exist
return;
}
struct listNode *temp = head;
char arr[500];
while (fscanf(f, "%s", arr) == 1)
{
if (head == NULL)
{
head = (struct listNode *)malloc(sizeof(struct listNode));
addNewSongNode(songIndex, songTitle, songArtist, songLength, head);
tail = head;
}
else
{
current = (struct listNode *)malloc(sizeof(struct listNode));
addNewSongNode(songIndex,songTitle, songArtist, songLength, current);
insertListNode(tail, current);
tail = current;
}
}
printf("Load Successfully\n");
fclose(f);
menuText(playlistName);
break;
case 12: //if option 12 is chosen, kill program and display goodbye message
printf("Thanks & Goodbye! :)");
exit(1);
}
}
}
}
//main
int main(void)
{
printf("\n***WELCOME TO THE MTU PLAYLIST CREATOR***\n\n");
printMenuMain(setPlaylistName); //call printMainMenu function
}Editor is loading...