initiation librodrome

app/composables/usePlaylist.ts

@@ -0,0 +1,51 @@
+import type { Song } from '~/types/song'
+
+export function usePlaylist() {
+  const store = usePlayerStore()
+  const bookData = useBookData()
+  const { loadAndPlay } = useAudioPlayer()
+
+  async function loadFullPlaylist() {
+    await bookData.init()
+    const songs = bookData.getPlaylistOrder()
+    store.setPlaylist(songs)
+  }
+
+  function shufflePlaylist() {
+    const current = [...store.playlist]
+    // Fisher-Yates shuffle
+    for (let i = current.length - 1; i > 0; i--) {
+      const j = Math.floor(Math.random() * (i + 1))
+      ;[current[i], current[j]] = [current[j], current[i]]
+    }
+    store.setPlaylist(current)
+    store.toggleShuffle()
+  }
+
+  function unshuffle() {
+    const songs = bookData.getPlaylistOrder()
+    store.setPlaylist(songs)
+    store.toggleShuffle()
+  }
+
+  function playSongFromPlaylist(song: Song) {
+    loadAndPlay(song)
+  }
+
+  function toggleShuffle() {
+    if (store.isShuffled) {
+      unshuffle()
+    }
+    else {
+      shufflePlaylist()
+    }
+  }
+
+  return {
+    loadFullPlaylist,
+    shufflePlaylist,
+    unshuffle,
+    playSongFromPlaylist,
+    toggleShuffle,
+  }
+}