49 lines
1,014 B
Go
49 lines
1,014 B
Go
/*
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* MumbleDJ
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* By Matthieu Grieger
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* songqueue.go
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* Copyright (c) 2014 Matthieu Grieger (MIT License)
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*/
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package main
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import (
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"errors"
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)
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// SongQueue type declaration. Serves as a wrapper around the queue structure defined in queue.go.
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type SongQueue struct {
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queue []*Song
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}
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// Initializes a new queue and returns the new SongQueue.
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func NewSongQueue() *SongQueue {
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return &SongQueue{
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queue: make([]*Song, 0),
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}
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}
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// Adds a song to the SongQueue.
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func (q *SongQueue) AddSong(s *Song) error {
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beforeLen := len(q.queue)
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q.queue = append(q.queue, s)
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if len(q.queue) == beforeLen+1 {
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return nil
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} else {
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return errors.New("Could not add Song to the SongQueue.")
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}
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}
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// Moves to the next song in SongQueue. NextSong() pops the first value of the queue, and is stored
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// in dj.currentSong.
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func (q *SongQueue) NextSong() *Song {
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s, queue := q.queue[0], q.queue[1:]
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q.queue = queue
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return s
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}
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// Returns the length of the SongQueue.
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func (q *SongQueue) Len() int {
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return len(q.queue)
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}
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