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import { GLib, GObject, property, readFile, register, writeFileAsync } from "astal";
import AstalMpris from "gi://AstalMpris";
import { isRealPlayer } from "../utils/mpris";
@register({ GTypeName: "Players" })
export default class Players extends GObject.Object {
static instance: Players;
static get_default() {
if (!this.instance) this.instance = new Players();
return this.instance;
}
readonly #path = `${STATE}/players.txt`;
readonly #players: AstalMpris.Player[] = [];
readonly #subs = new Map<
JSX.Element,
{ signals: string[]; callback: () => void; ids: number[]; player: AstalMpris.Player | null }
>();
@property(AstalMpris.Player)
get lastPlayer(): AstalMpris.Player | null {
return this.#players.length > 0 && this.#players[0].identity !== null ? this.#players[0] : null;
}
/**
* List of real players.
*/
@property(Object)
get list() {
return this.#players;
}
hookLastPlayer(widget: JSX.Element, signal: string, callback: () => void): this;
hookLastPlayer(widget: JSX.Element, signals: string[], callback: () => void): this;
hookLastPlayer(widget: JSX.Element, signals: string | string[], callback: () => void) {
if (!Array.isArray(signals)) signals = [signals];
// Add subscription
if (this.lastPlayer)
this.#subs.set(widget, {
signals,
callback,
ids: signals.map(s => this.lastPlayer!.connect(s, callback)),
player: this.lastPlayer,
});
else this.#subs.set(widget, { signals, callback, ids: [], player: null });
// Remove subscription on widget destroyed
widget.connect("destroy", () => {
const sub = this.#subs.get(widget);
if (sub?.player) sub.ids.forEach(id => sub.player!.disconnect(id));
this.#subs.delete(widget);
});
// Initial run of callback
callback();
// For chaining
return this;
}
makeCurrent(player: AstalMpris.Player) {
const index = this.#players.indexOf(player);
// Ignore if already current
if (index === 0) return;
// Remove if present
else if (index > 0) this.#players.splice(index, 1);
// Connect signals if not already in list (i.e. new player)
else this.#connectPlayerSignals(player);
// Add to front
this.#players.unshift(player);
this.#updatePlayer();
// Save to file
this.#save();
}
#updatePlayer() {
this.notify("last-player");
for (const sub of this.#subs.values()) {
sub.callback();
if (sub.player) sub.ids.forEach(id => sub.player!.disconnect(id));
sub.ids = this.lastPlayer ? sub.signals.map(s => this.lastPlayer!.connect(s, sub.callback)) : [];
sub.player = this.lastPlayer;
}
}
#save() {
writeFileAsync(this.#path, this.#players.map(p => p.busName).join("\n")).catch(console.error);
}
#connectPlayerSignals(player: AstalMpris.Player) {
// Change order on attribute change
for (const signal of [
"notify::playback-status",
"notify::shuffle-status",
"notify::loop-status",
"notify::volume",
"notify::rate",
])
player.connect(signal, () => this.makeCurrent(player));
}
constructor() {
super();
const mpris = AstalMpris.get_default();
// Load players
if (GLib.file_test(this.#path, GLib.FileTest.EXISTS)) {
this.#players = readFile(this.#path)
.split("\n")
.map(p => mpris.players.find(p2 => p2.busName === p))
.filter(isRealPlayer) as AstalMpris.Player[];
// Add new players from in between sessions
for (const player of mpris.players)
if (!this.#players.includes(player) && isRealPlayer(player)) this.#players.push(player);
} else {
const sortOrder = [
AstalMpris.PlaybackStatus.PLAYING,
AstalMpris.PlaybackStatus.PAUSED,
AstalMpris.PlaybackStatus.STOPPED,
];
this.#players = mpris.players
.filter(isRealPlayer)
.sort((a, b) => sortOrder.indexOf(a.playbackStatus) - sortOrder.indexOf(b.playbackStatus));
}
this.#updatePlayer();
this.#save();
// Connect signals to loaded players
for (const player of this.#players) this.#connectPlayerSignals(player);
// Add and connect signals when added
mpris.connect("player-added", (_, player) => {
if (isRealPlayer(player)) {
this.makeCurrent(player);
this.notify("list");
}
});
// Remove when closed
mpris.connect("player-closed", (_, player) => {
const index = this.#players.indexOf(player);
if (index >= 0) {
this.#players.splice(index, 1);
this.notify("list");
if (index === 0) this.#updatePlayer();
this.#save();
}
});
}
}
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