Implement per guild music queue and player

internal/music/queue.go

@@ -0,0 +1,83 @@
+package music
+
+import (
+	"math/rand"
+	"sync"
+
+	"github.com/disgoorg/disgolink/v4/lavalink"
+)
+
+type Queue struct {
+	mu     sync.Mutex
+	tracks []lavalink.Track
+}
+
+func NewQueue() *Queue {
+	return &Queue{}
+}
+
+func (q *Queue) Push(track lavalink.Track) {
+	q.mu.Lock()
+	defer q.mu.Unlock()
+
+	q.tracks = append(q.tracks, track)
+}
+
+func (q *Queue) Pop() (lavalink.Track, bool) {
+	q.mu.Lock()
+	defer q.mu.Unlock()
+
+	if len(q.tracks) == 0 {
+		return lavalink.Track{}, false
+	}
+
+	track := q.tracks[0]
+	q.tracks = q.tracks[1:]
+	return track, true
+}
+
+func (q *Queue) Clear() {
+	q.mu.Lock()
+	defer q.mu.Unlock()
+
+	q.tracks = nil
+}
+
+func (q *Queue) List() []lavalink.Track {
+	q.mu.Lock()
+	defer q.mu.Unlock()
+
+	tracks := make([]lavalink.Track, len(q.tracks))
+	copy(tracks, q.tracks)
+	return tracks
+}
+
+func (q *Queue) Len() int {
+	q.mu.Lock()
+	defer q.mu.Unlock()
+
+	return len(q.tracks)
+}
+
+func (q *Queue) Shuffle() int {
+	q.mu.Lock()
+	defer q.mu.Unlock()
+
+	rand.Shuffle(len(q.tracks), func(i, j int) {
+		q.tracks[i], q.tracks[j] = q.tracks[j], q.tracks[i]
+	})
+	return len(q.tracks)
+}
+
+func (q *Queue) RemoveAt(index int) (lavalink.Track, bool) {
+	q.mu.Lock()
+	defer q.mu.Unlock()
+
+	if index < 0 || index >= len(q.tracks) {
+		return lavalink.Track{}, false
+	}
+
+	track := q.tracks[index]
+	q.tracks = append(q.tracks[:index], q.tracks[index+1:]...)
+	return track, true
+}