web-player: split player, navigation and accent state into focused modules

web-player/src/lib/player/actions.ts

@@ -0,0 +1,18 @@
+import { shuffle } from '$lib/utils/collections';
+import type { Track } from '$lib/types';
+import { player } from './player.svelte';
+
+export function isQueueCurrent(items: { id: string }[]): boolean {
+	return items.some((item) => item.id === player.currentId);
+}
+
+export function playAllOrToggle(items: Track[]) {
+	if (items.length === 0) return;
+	if (isQueueCurrent(items)) player.toggle();
+	else player.playQueue(items, 0);
+}
+
+export function playShuffled(items: Track[]) {
+	if (items.length === 0) return;
+	player.playQueue(shuffle(items), 0);
+}