koel/resources/assets/js/stores/queue.js

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import {
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head,
last,
includes,
union,
difference,
indexOf,
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map,
shuffle
} from 'lodash';
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export default {
state: {
songs: [],
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current: null,
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},
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init() {
// We don't have anything to do here yet.
// How about another song then?
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//
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// LITTLE WING
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// -- by Jimi Fucking Hendrix
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//
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// Well she's walking
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// Through the clouds
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// With a circus mind
// That's running wild
// Butterflies and zebras and moonbeams and fairytales
// That's all she ever thinks about
// Riding with the wind
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//
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// When I'm sad
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// She comes to me
// With a thousand smiles
// She gives to me free
// It's alright she said
// It's alright
// Take anything you want from me
// Anything...
},
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/**
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* All queued songs.
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*
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* @return {Array.<Object>}
*/
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get all() {
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return this.state.songs;
},
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/**
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* The first song in the queue.
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*
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* @return {?Object}
*/
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get first() {
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return head(this.state.songs);
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},
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/**
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* The last song in the queue.
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*
* @return {?Object}
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*/
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get last() {
return last(this.state.songs);
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},
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/**
* Determine if the queue contains a song.
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*
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* @param {Object} song
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*
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* @return {Boolean}
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*/
contains(song) {
return includes(this.all, song);
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},
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/**
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* Add a list of songs to the end of the current queue,
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* or replace the current queue as a whole if `replace` is true.
*
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* @param {Object|Array.<Object>} songs The song, or an array of songs
* @param {Boolean} replace Whether to replace the current queue
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* @param {Boolean} toTop Whether to prepend or append to the queue
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*/
queue(songs, replace = false, toTop = false) {
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songs = [].concat(songs);
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if (replace) {
this.state.songs = songs;
} else {
if (toTop) {
this.state.songs = union(songs, this.state.songs);
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} else {
this.state.songs = union(this.state.songs, songs);
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}
}
},
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/**
* Queue song(s) to after the current song.
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*
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* @param {Array.<Object>|Object} songs
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*/
queueAfterCurrent(songs) {
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songs = [].concat(songs);
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if (!this.state.current || !this.state.songs.length) {
return this.queue(songs);
}
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const head = this.state.songs.splice(0, this.indexOf(this.state.current) + 1);
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this.state.songs = head.concat(songs, this.state.songs);
},
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/**
* Unqueue a song, or several songs at once.
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*
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* @param {Object|String|Array.<Object>} songs The song(s) to unqueue
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*/
unqueue(songs) {
this.state.songs = difference(this.state.songs, [].concat(songs));
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},
/**
* Move some songs to after a target.
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*
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* @param {Array.<Object>} songs Songs to move
* @param {Object} target The target song object
*/
move(songs, target) {
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const $targetIndex = this.indexOf(target);
songs.forEach(song => {
this.state.songs.splice(this.indexOf(song), 1);
this.state.songs.splice($targetIndex, 0, song);
});
},
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/**
* Clear the current queue.
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*
* @param {?Function} cb The function to execute after clearing
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*/
clear(cb = null) {
this.state.songs = [];
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this.state.current = null;
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if (cb) {
cb();
}
},
/**
* Get index of a song in the queue.
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*
* @param {Object} song
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*
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* @return {?Integer}
*/
indexOf(song) {
return indexOf(this.state.songs, song);
},
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/**
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* The next song in queue.
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*
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* @return {?Object}
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*/
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get next() {
if (!this.current) {
return first(this.state.songs);
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}
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const idx = map(this.state.songs, 'id').indexOf(this.current.id) + 1;
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return idx >= this.state.songs.length ? null : this.state.songs[idx];
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},
/**
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* The previous song in queue.
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*
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* @return {?Object}
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*/
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get previous() {
if (!this.current) {
return last(this.state.songs);
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}
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const idx = map(this.state.songs, 'id').indexOf(this.current.id) - 1;
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return idx < 0 ? null : this.state.songs[idx];
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},
/**
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* The current song.
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*
* @return {Object}
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*/
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get current() {
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return this.state.current;
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},
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/**
* Set a song as the current queued song.
*
* @param {Object} song
*
* @return {Object} The queued song.
*/
set current(song) {
this.state.current = song;
return this.current;
},
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/**
* Shuffle the queue.
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*
* @return {Array.<Object>} The shuffled array of song objects
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*/
shuffle() {
return (this.state.songs = shuffle(this.state.songs));
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},
};