DJ Playlist Management System

Overview

A console-based C++ application designed for DJs to manage song playlists for events and festivals. This system allows for dynamic playlist management with preference-based song queuing, playback control, and history tracking using circular queue data structures.

Features

1. Preference-Based Song Management

• Organizes songs into three priority levels (VIP, Regular, Low)
• Plays higher preference songs first, maintaining order within each preference level
• Automatically selects the next highest priority song when the current one finishes

2. Song Playback Control

• Play songs from the queue based on priority
• Skip specific time intervals of the currently playing song
• Replay the last played song from history
• Remove specific songs from any playlist by name

3. Playlist Visualization

• Display all songs in order of playback priority
• View history of previously played songs in chronological order
• Track remaining playback time for the current song

4. File-Based I/O

• Reads commands from input.txt
• Writes operation results to output.txt
• Supports batch processing of playlist operations

Usage Instructions

• Adding a Song ADD [preference_type] [duration] [song_name]

preference_type: 1 (VIP), 2 (Regular), 3 (Low)
duration: Length of song in seconds
song_name: Name of the song

• Playing a Song PLAY
  Begins playback of the highest priority song in the queue

• Skipping Part of a Song SKIP [seconds]
  Skips forward by specified number of seconds in the current song

• Replaying Last Song REPLAY
  Puts the last played song back at the front of its preference queue and plays it again

• Removing a Song REMOVE [song_name]
  Removes the specified song from any playlist it's found in

• Showing Current Playlists SHOW
  Displays all songs in all playlists, organized by preference level

• Viewing Playback History HISTORY
  Shows the chronological list of all songs that have been played

Implementation Details

• Uses circular queue data structures for efficient song management
• Separate queues for each preference level
• Additional queue for tracking playback history
• Time-based tracking system for current song progress

Error Handling

The system validates operations and provides appropriate messages for:

• Attempting to play songs when playlists are empty
• Skipping when no song is currently playing
• Replaying when history is empty
• Removing a song that doesn't exist in any playlist