92 lines
2.3 KiB
JavaScript
92 lines
2.3 KiB
JavaScript
import PlaylistSong from "./PlaylistSong.js";
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/**
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* A playlist that holds a multitude of songs in the form of {@see PlaylistSong}.
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*/
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export default class SongPlaylist {
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/**
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* Instantiates a playlist for songs.
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*
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* @param {string} name The name of the playlist.
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*/
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constructor(name) {
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this._list = [];
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this._name = name;
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this._current = 0;
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}
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/**
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*
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* @returns {string} the name of the string.
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*/
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getName() {
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return this._name;
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}
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/**
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*
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* @param {number} index the index of the song to retrieve.
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* @returns {PlaylistSong} the song at the given index.
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*/
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songAtIndex(index) {
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if (index >= this._list.length) {
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return null;
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}
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return this.list[index];
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}
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/**
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* Automatically creates and adds a {@see PlaylistSong} to this playlist.
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*
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* @param {string} url where the audio data can be found.
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* @param {string} name the name of the song.
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* @param {string} author the author(s) of the song.
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*/
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add(url, name, author) {
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this._list.push(new PlaylistSong(url, name, author, this));
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}
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/**
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* Removes a {@see playlistSong} from this playlist.
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*
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* @param {number} index the index of the song to be removed.
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* @returns {PlaylistSong} the song that was removed, or null if the index of was invalid.
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*/
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remove(index) {
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if (index >= this._list.length) {
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return null;
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}
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let removed = this._list.splice(index, 1)[0];
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if (removed.length > 0) {
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return removed[0];
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}
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}
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/**
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* Attempts to find a {@link PlaylistSong} given a name.
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*
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* @param {string} name the name of the song to be found.
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* @returns {number} the index of the song found, or -1 if it was not found.
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*/
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findSongIndex(name) {
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return this._list.findIndex((item) => item.getDisplayName() == name);
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}
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/**
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*
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* @returns {number} total number of songs in this playlist.
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*/
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total() {
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return this._list.length;
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}
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/**
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* Unloads the audio data of all songs in this playlist.
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*/
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unloadAllAudio() {
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this._list.forEach(playlistSong => {
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playlistSong.unloadAudio();
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});
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}
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} |