Fix changing songs and add LRU cache

.gitpod.yml

@@ -84,7 +84,7 @@ ports:
 
 vscode:
   extensions:
-    - lukashass.volar
+    - Vue.volar
     - ms-python.python
     - ms-toolsai.jupyter
     - ms-toolsai.jupyter-keymap

.vscode/extensions.json

@@ -0,0 +1,5 @@
+{
+    "recommendations": [
+        "Vue.volar"
+    ]
+}

front/package.json

@@ -36,6 +36,7 @@
     "idb-keyval": "^6.2.0",
     "js-logger": "1.6.1",
     "lodash-es": "4.17.21",
+    "lru-cache": "^7.14.0",
     "moment": "2.29.4",
     "qs": "6.11.0",
     "showdown": "2.1.0",

front/src/composables/audio/player.ts

@@ -8,12 +8,11 @@ import store from '~/store'
 import axios from 'axios'
 
 export const isPlaying = ref(false)
-
-watch(isPlaying, (playing) => {
+watchEffect(() => {
   const sound = currentSound.value
   if (!sound) return
 
-  if (playing) {
+  if (isPlaying.value) {
     sound.play()
     return
   }

front/src/composables/audio/queue.ts

@@ -85,12 +85,19 @@ const createQueueTrack = async (track: Track): Promise<QueueTrack> => {
 }
 
 // Adding tracks
-export const enqueue = async (...newTracks: Track[]) => {
+export const enqueueAt = async (index: number, ...newTracks: Track[]) => {
   const queueTracks = await Promise.all(newTracks.map(createQueueTrack))
   await setMany(queueTracks.map(track => [track.id, track]))
 
   const ids = queueTracks.map(track => track.id)
+
+  if (index >= tracks.value.length) {
+    // we simply push to the end
     tracks.value.push(...ids)
+  } else {
+    // we insert the track at given position
+    tracks.value.splice(index, 0, ...ids)
+  }
 
   // Shuffle new tracks
   if (isShuffled.value) {
@@ -98,6 +105,10 @@ export const enqueue = async (...newTracks: Track[]) => {
   }
 }
 
+export const enqueue = async (...newTracks: Track[]) => {
+  return enqueueAt(tracks.value.length, ...newTracks)
+}
+
 // Removing tracks
 export const dequeue = async (index: number) => {
   if (currentIndex.value === index) {
@@ -131,7 +142,6 @@ export const playTrack = async (trackIndex: number, force = false) => {
   }
 
   currentIndex.value = trackIndex
-  if (isPlaying.value) currentSound.value?.play()
 }
 
 // Previous track
@@ -198,6 +208,15 @@ export const shuffle = () => {
   shuffledIds.value = shuffleArray(tracks.value)
 }
 
+export const reshuffleUpcomingTracks = () => {
+  // TODO: Test if needed to add 1 to currentIndex
+  const listenedTracks = shuffledIds.value.slice(0, currentIndex.value)
+  const upcomingTracks = shuffledIds.value.slice(currentIndex.value)
+
+  listenedTracks.push(...shuffleArray(upcomingTracks))
+  shuffledIds.value = listenedTracks
+}
+
 // Ends in
 const now = useNow()
 export const endsIn = useTimeAgo(computed(() => {

front/src/composables/audio/tracks.ts

@@ -2,18 +2,20 @@ import type { QueueTrack, QueueTrackSource } from '~/composables/audio/queue'
 import type { Sound } from '~/api/player'
 
 import { soundImplementation } from '~/api/player'
-import { computed, shallowReactive } from 'vue'
+import { computed, watchEffect } from 'vue'
 
 import { playNext, queue, currentTrack, currentIndex } from '~/composables/audio/queue'
 import { connectAudioSource } from '~/composables/audio/audio-api'
 import { isPlaying } from '~/composables/audio/player'
+
+import useLRUCache from '~/composables/useLRUCache'
 import store from '~/store'
 
 const ALLOWED_PLAY_TYPES: (CanPlayTypeResult | undefined)[] = ['maybe', 'probably']
 const AUDIO_ELEMENT = document.createElement('audio')
 
 const soundPromises = new Map<number, Promise<Sound>>()
-const soundCache = shallowReactive(new Map<number, Sound>())
+const soundCache = useLRUCache<number, Sound>({ max: 10 })
 
 const getTrackSources = (track: QueueTrack): QueueTrackSource[] => {
   const sources: QueueTrackSource[] = track.sources
@@ -60,7 +62,6 @@ export const createSound = async (track: QueueTrack): Promise<Sound> => {
       // NOTE: We push it to the end of the job queue
       setTimeout(playNext, 0)
     })
-
     soundCache.set(track.id, sound)
     soundPromises.delete(track.id)
     return sound
@@ -74,7 +75,7 @@ export const createSound = async (track: QueueTrack): Promise<Sound> => {
 // Create track from queue
 export const createTrack = async (index: number) => {
   if (queue.value.length <= index || index === -1) return
-  console.log('LOADING TRACK')
+  console.log('LOADING TRACK', index)
 
   const track = queue.value[index]
   if (!soundPromises.has(track.id) && !soundCache.has(track.id)) {
@@ -88,7 +89,7 @@ export const createTrack = async (index: number) => {
   sound.audioNode.disconnect()
   connectAudioSource(sound.audioNode)
 
-  if (isPlaying.value) {
+  if (isPlaying.value && index === currentIndex.value) {
     await sound.play()
   }
 
@@ -101,4 +102,6 @@ export const createTrack = async (index: number) => {
   }
 }
 
+watchEffect(async () => createTrack(currentIndex.value))
+
 export const currentSound = computed(() => soundCache.get(currentTrack.value?.id ?? -1))

front/src/composables/audio/usePlayOptions.ts

@@ -9,7 +9,7 @@ import { useStore } from '~/store'
 import axios from 'axios'
 import jQuery from 'jquery'
 
-import { enqueue as addToQueue, currentTrack } from '~/composables/audio/queue'
+import { enqueue as addToQueue, currentTrack, playNext, currentIndex, enqueueAt, queue } from '~/composables/audio/queue'
 import { isPlaying } from '~/composables/audio/player'
 
 export interface PlayOptionsProps {
@@ -143,11 +143,11 @@ export default (props: PlayOptionsProps) => {
 
     const tracks = await getPlayableTracks()
 
-    const wasEmpty = store.state.queue.tracks.length === 0
-    await store.dispatch('queue/appendMany', { tracks, index: store.state.queue.currentIndex + 1 })
+    const wasEmpty = queue.value.length === 0
+    await enqueueAt(currentIndex.value + 1, ...tracks)
 
     if (next && !wasEmpty) {
-      await store.dispatch('queue/next')
+      await playNext()
       isPlaying.value = true
     }
 

front/src/composables/useLRUCache.ts

@@ -0,0 +1,11 @@
+import LRU from 'lru-cache'
+import { reactive } from 'vue'
+
+export default <T, K>(options: LRU.Options<T, K>) => {
+  const cache = new LRU(options)
+
+  // @ts-expect-error keyMap is used internally so it is not defined in the types
+  cache.keyMap = reactive(cache.keyMap)
+
+  return cache
+}

front/yarn.lock

@@ -4120,6 +4120,11 @@ lru-cache@^6.0.0:
   dependencies:
     yallist "^4.0.0"
 
+lru-cache@^7.14.0:
+  version "7.14.0"
+  resolved "https://registry.yarnpkg.com/lru-cache/-/lru-cache-7.14.0.tgz#21be64954a4680e303a09e9468f880b98a0b3c7f"
+  integrity sha512-EIRtP1GrSJny0dqb50QXRUNBxHJhcpxHC++M5tD7RYbvLLn5KVWKsbyswSSqDuU15UFi3bgTQIY8nhDMeF6aDQ==
+
 magic-string@^0.25.0, magic-string@^0.25.7:
   version "0.25.9"
   resolved "https://registry.yarnpkg.com/magic-string/-/magic-string-0.25.9.tgz#de7f9faf91ef8a1c91d02c2e5314c8277dbcdd1c"