WFTXv4HK

1/** Container for music tracks */
2module.exports = class Song {
3    /**
4     * Creates a container to unify different API data
5     * @param {string} type The type of container to create
6     * @param {Object} data The data to be supplied to the container
7     */
8    constructor(type, data) {
9        /**
10         * The type of this container
11         * @type {string}
12         */
13        this.type = type
14
15        /**
16         * The title of this song
17         * @type {string}
18         */
19        this.title = `Unknown`
20
21        /**
22         * The URL to this song
23         * @type {string}
24         */
25        this.url = ''
26
27        /**
28         * The raw data for this container
29         * @type {Object}
30         */
31        this.data = data
32
33        switch(type) {
34            case('spotify'): {
35                this.title = `${data.title || data.name} - ${data.artist || data.artists.map(r => r.name)[0]}`;
36                this.url = this.data.link || ('https://open.spotify.com/track/' + this.data.id);
37                this._duration = this.data.duration_ms || 0;
38                break;
39            }
40            case('youtube'): {
41                this._youtube = data;
42                this.title = this.youtube.title;
43                this.url = 'https://youtu.be/' + this.youtube.id;
44                this._duration = this.youtube.duration || 0;
45                break;
46            }
47            case('soundcloud'): {
48                this.soundcloud = data;
49                this.title = `${data.title} - ${data.author.name}`;
50                this.url = 'https://soundcloud.com';
51                this._duration = 0;
52                break;
53            }
54            default: return null;
55        }
56        return this;
57    }
58
59    /**
60     * The duration of this song in milliseconds
61     * @type {number}
62     */
63    get duration() {
64        return !this._youtube ? this._duration : this._youtube.duration;
65    }
66
67    /**
68     * Searches the data of this song via the YouTube API
69     * @returns {Promise<Object|null>} API data or null
70     */
71    async fetchYoutube() {
72        return this._youtube = await _searchSong(this.title).catch(e => {return null});
73    }
74
75    /**
76     * Searches the lyrics for this song via the Melon API
77     * @returns {Promise<Object|null>} a promise with the API data or null
78     */
79    async fetchLyrics() {
80        return this._lyrics = await lyrics.get('melon', this.title).catch(e => {return null});
81    }
82
83    /**
84     * Queries YouTube or returns API data from the private key
85     * @returns {*}
86     */
87    get youtube() {
88        if (!(this._youtube === undefined)) return this._youtube;
89        return this.fetchYoutube();
90    }
91
92    /**
93     * Queries Melon or returns API data from the private key
94     * @returns {*}
95     */
96    get lyrics() {
97        if (!(this._lyrics === undefined)) return this._lyrics;
98        return this.fetchLyrics();
99    }
100}