Added helper queue methods

Kirika_test.go

@@ -694,7 +694,7 @@ func TestQueue(t *testing.T) {
 					t.Logf("Finished playback of %d %s: output %d samples\n", entry.Identifier, fullPath, entry.ReadSamples)
 				}, func(q *audio.Queue, entry *audio.QueueEntry) {
 					fp.Close()
-					if len(q.GetQueue()) == 0 {
+					if q.GetQueueSize() == 0 {
 						t.Log("Finished playback, closing\n")
 						q.Close()
 					}

audio/queue.go

@@ -217,7 +217,34 @@ func (q *Queue) Remove(identifier QueueIdentifier) bool {
 
 }
 
-func (q *Queue) GetQueueEntry(identifier QueueIdentifier) (int, *QueueEntry) {
+func (q *Queue) GetQueueHead() *QueueEntry {
+	q.lock.RLock()
+	defer q.lock.RUnlock()
+	if len(q.queue) > 0 {
+		return q.queue[0]
+	}
+	return nil
+}
+
+func (q *Queue) GetQueueTail() *QueueEntry {
+	q.lock.RLock()
+	defer q.lock.RUnlock()
+	if len(q.queue) > 0 {
+		return q.queue[len(q.queue)-1]
+	}
+	return nil
+}
+
+func (q *Queue) GetQueueIndex(index int) *QueueEntry {
+	q.lock.RLock()
+	defer q.lock.RUnlock()
+	if len(q.queue) > index {
+		return q.queue[index]
+	}
+	return nil
+}
+
+func (q *Queue) GetQueueEntry(identifier QueueIdentifier) (index int, entry *QueueEntry) {
 	q.lock.RLock()
 	defer q.lock.RUnlock()
 	for i, e := range q.queue {
@@ -228,13 +255,19 @@ func (q *Queue) GetQueueEntry(identifier QueueIdentifier) (int, *QueueEntry) {
 	return -1, nil
 }
 
-func (q *Queue) GetQueue() (ids []QueueIdentifier) {
+func (q *Queue) GetQueueSize() int {
 	q.lock.RLock()
 	defer q.lock.RUnlock()
 
-	for _, e := range q.queue {
-		ids = append(ids, e.Identifier)
-	}
+	return len(q.queue)
+}
+
+func (q *Queue) GetQueue() (entries []*QueueEntry) {
+	q.lock.RLock()
+	defer q.lock.RUnlock()
+
+	entries = make([]*QueueEntry, len(q.queue))
+	copy(entries, q.queue)
 
 	return
 }