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import shuffle from 'array-shuffle';
export interface QueuedPlaylist {
title: string;
source: string;
}
export interface QueuedSong {
title: string;
artist: string;
url: string;
length: number;
playlist: QueuedPlaylist | null;
isLive: boolean;
}
export default class {
private queue: QueuedSong[] = [];
private position = 0;
forward(): void {
if (this.position <= this.size() + 1) {
this.position++;
} else {
throw new Error('No songs in queue to forward to.');
}
}
back(): void {
if (this.position - 1 >= 0) {
this.position--;
} else {
throw new Error('No songs in queue to go back to.');
}
}
getCurrent(): QueuedSong | null {
if (this.queue[this.position]) {
return this.queue[this.position];
}
return null;
}
get(): QueuedSong[] {
return this.queue.slice(this.position + 1);
}
add(song: QueuedSong): void {
if (song.playlist) {
// Add to end of queue
this.queue.push(song);
} else {
// Not from playlist, add immediately
let insertAt = 0;
// Loop until playlist song
this.queue.some(song => {
if (song.playlist) {
return true;
}
insertAt++;
return false;
});
this.queue = [...this.queue.slice(0, insertAt), song, ...this.queue.slice(insertAt)];
}
}
shuffle(): void {
this.queue = [...this.queue.slice(0, this.position), this.queue[this.position], this.queue[0], ...shuffle(this.queue.slice(this.position + 1))];
}
clear(): void {
const newQueue = [];
// Don't clear curently playing song
if (this.queue.length > 0) {
newQueue.push(this.queue[this.position]);
}
this.queue = newQueue;
}
size(): number {
return this.get().length;
}
isEmpty(): boolean {
return this.get().length === 0;
}
}
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