From 5eff89920acfe81e5d1500d55b6fb0aab6184676 Mon Sep 17 00:00:00 2001
From: wvffle <funkwhale@wvffle.net>
Date: Thu, 3 Nov 2022 09:37:56 +0000
Subject: [PATCH] Add MilkDrop

---
 front/package.json                            |   2 +
 front/src/components/Queue.vue                |   2 +
 .../components/audio/visualizer/MilkDrop.vue  | 119 ++++++++++++++++++
 front/src/composables/audio/visualizer.ts     |  63 ++++++++++
 front/src/style/components/_queue.scss        |   5 +
 front/yarn.lock                               |  39 ++++++
 6 files changed, 230 insertions(+)
 create mode 100644 front/src/components/audio/visualizer/MilkDrop.vue
 create mode 100644 front/src/composables/audio/visualizer.ts

diff --git a/front/package.json b/front/package.json
index 4e4a619d9..07863072d 100644
--- a/front/package.json
+++ b/front/package.json
@@ -28,6 +28,8 @@
     "@vueuse/router": "9.3.1",
     "axios": "0.27.2",
     "axios-auth-refresh": "3.3.4",
+    "butterchurn": "^3.0.0-beta.4",
+    "butterchurn-presets": "^3.0.0-beta.4",
     "diff": "5.1.0",
     "dompurify": "2.4.0",
     "focus-trap": "7.0.0",
diff --git a/front/src/components/Queue.vue b/front/src/components/Queue.vue
index 1bf3e6429..fb93d480d 100644
--- a/front/src/components/Queue.vue
+++ b/front/src/components/Queue.vue
@@ -17,6 +17,7 @@ import time from '~/utils/time'
 import TrackFavoriteIcon from '~/components/favorites/TrackFavoriteIcon.vue'
 import TrackPlaylistIcon from '~/components/playlists/TrackPlaylistIcon.vue'
 import PlayerControls from '~/components/audio/PlayerControls.vue'
+import MilkDrop from '~/components/audio/visualizer/MilkDrop.vue'
 import VirtualList from '~/components/vui/list/VirtualList.vue'
 import QueueItem from '~/components/QueueItem.vue'
 
@@ -164,6 +165,7 @@ const hideArtist = () => {
         <template v-if="currentTrack">
           <div class="cover-container">
             <div class="cover">
+              <milk-drop />
               <img
                 ref="cover"
                 alt=""
diff --git a/front/src/components/audio/visualizer/MilkDrop.vue b/front/src/components/audio/visualizer/MilkDrop.vue
new file mode 100644
index 000000000..8bb9599e8
--- /dev/null
+++ b/front/src/components/audio/visualizer/MilkDrop.vue
@@ -0,0 +1,119 @@
+<script setup lang="ts">
+import { useMilkDrop } from '~/composables/audio/visualizer'
+
+import { onScopeDispose, ref } from 'vue'
+import { refAutoReset, useFullscreen, useIdle, useRafFn, whenever } from '@vueuse/core'
+import { useQueue } from '~/composables/audio/queue'
+
+const milkdrop = ref()
+const canvas = ref()
+
+const { isFullscreen: fullscreen, enter, exit } = useFullscreen(milkdrop)
+const { visualizer, loadRandomPreset, render } = useMilkDrop(canvas)
+const { currentTrack } = useQueue()
+const { idle } = useIdle(2000)
+
+const showTrackInfo = refAutoReset(false, 5000)
+whenever(currentTrack, () => (showTrackInfo.value = true))
+
+const { pause } = useRafFn(render)
+
+onScopeDispose(() => {
+  exit()
+  pause()
+  if (visualizer.value) {
+    visualizer.value.loseGLContext()
+  }
+})
+</script>
+
+<template>
+  <div
+    ref="milkdrop"
+    :class="['visualizer', { idle, fullscreen }]"
+  >
+    <canvas
+      ref="canvas"
+      @click="loadRandomPreset()"
+    />
+    <button
+      v-if="!fullscreen"
+      class="ui secondary button"
+      @click="enter"
+    >
+      <i class="icon expand arrows alternate" />
+    </button>
+
+    <Transition name="slide-down">
+      <div
+        v-if="fullscreen && (!idle || showTrackInfo)"
+        class="track-info"
+        @click="loadRandomPreset()"
+      >
+        <h1>{{ currentTrack.title }}</h1>
+        <h2>{{ currentTrack.artistName }} &mdash; {{ currentTrack.albumTitle }}</h2>
+      </div>
+    </Transition>
+  </div>
+</template>
+
+<style scoped lang="scss">
+.visualizer {
+  &.idle {
+    cursor: none;
+  }
+
+  &.fullscreen {
+    .slide-down-enter-active,
+    .slide-down-leave-active {
+      transition: all 0.2s ease;
+      will-change: transform, opacity;
+    }
+
+    .slide-down-enter-from,
+    .slide-down-leave-to {
+      opacity: 0;
+      transform: translateY(5vh);
+    }
+  }
+
+  button {
+    z-index: 2;
+    position: absolute;
+    right: 1em;
+    bottom: 1em;
+    padding: 0.78571429em;
+    margin-right: 0 !important;
+
+    i.icon {
+      display: inline-block;
+      margin-right: 0 !important;
+      display: contents;
+
+      &::before {
+        display: flex;
+        justify-content: center;
+        width: 1em;
+        height: 1em;
+      }
+    }
+  }
+}
+
+.track-info {
+  position: absolute;
+  z-index: 2;
+  bottom: 0;
+  left: 0;
+  width: 100%;
+  background: linear-gradient(to bottom, #0000, #000);
+  color: #fff;
+  text-align: left;
+  padding: 3em 1em 1em;
+
+  h1, h2 {
+    margin: 0;
+  }
+}
+
+</style>
diff --git a/front/src/composables/audio/visualizer.ts b/front/src/composables/audio/visualizer.ts
new file mode 100644
index 000000000..4d687e8aa
--- /dev/null
+++ b/front/src/composables/audio/visualizer.ts
@@ -0,0 +1,63 @@
+import type { Ref } from 'vue'
+
+import { AUDIO_CONTEXT, GAIN_NODE } from './audio-api'
+import { useResizeObserver } from '@vueuse/core'
+import { ref, markRaw } from 'vue'
+
+// @ts-expect-error butterchurn has no typings
+import butterchurnPresets from 'butterchurn-presets'
+
+// @ts-expect-error butterchurn has no typings
+import butterchurn from 'butterchurn'
+
+export const useMilkDrop = (canvas: Ref<HTMLCanvasElement>) => {
+  const presets = Object.entries(butterchurnPresets)
+  const visualizer = ref()
+
+  const loadRandomPreset = (blendTime = 1) => {
+    const index = (presets.length * Math.random()) | 0
+    const [name, preset] = presets[index]
+    console.log(`Switching to preset: '${name}'`)
+    visualizer.value.loadPreset(preset, blendTime)
+  }
+
+  const initialize = (canvas: HTMLCanvasElement, width: number, height: number) => {
+    visualizer.value = markRaw(butterchurn.createVisualizer(AUDIO_CONTEXT, canvas, {
+      width,
+      height
+    }))
+
+    loadRandomPreset(0)
+    visualizer.value.connectAudio(GAIN_NODE)
+  }
+
+  useResizeObserver(canvas, ([entry]) => {
+    const { width, height } = entry.contentRect
+
+    console.log(width, height)
+    canvas.value.width = width
+    canvas.value.height = height
+
+    if (visualizer.value === undefined) {
+      initialize(entry.target as HTMLCanvasElement, width, height)
+      return
+    }
+
+    visualizer.value.setRendererSize(width, height)
+  })
+
+  const render = () => {
+    try {
+      visualizer.value?.render()
+    } catch (error) {
+      console.error(error)
+      loadRandomPreset(0)
+    }
+  }
+
+  return {
+    visualizer,
+    loadRandomPreset,
+    render
+  }
+}
diff --git a/front/src/style/components/_queue.scss b/front/src/style/components/_queue.scss
index 9f717defe..538a92d28 100644
--- a/front/src/style/components/_queue.scss
+++ b/front/src/style/components/_queue.scss
@@ -295,6 +295,7 @@
           padding-bottom: 100%;
           position: relative;
 
+          canvas,
           img {
             height: 100%;
             width: 100%;
@@ -302,6 +303,10 @@
             top: 0;
             left: 0;
           }
+
+          canvas {
+            z-index: 1;
+          }
         }
       }
 
diff --git a/front/yarn.lock b/front/yarn.lock
index 6f0f43c24..2b1e0471e 100644
--- a/front/yarn.lock
+++ b/front/yarn.lock
@@ -19,6 +19,11 @@
     jsonpointer "^5.0.0"
     leven "^3.1.0"
 
+"@assemblyscript/loader@^0.17.11":
+  version "0.17.14"
+  resolved "https://registry.yarnpkg.com/@assemblyscript/loader/-/loader-0.17.14.tgz#43bfe793c787180c5eb0a57ada8318fb62171b4e"
+  integrity sha512-+PVTOfla/0XMLRTQLJFPg4u40XcdTfon6GGea70hBGi8Pd7ZymIXyVUR+vK8wt5Jb4MVKTKPIz43Myyebw5mZA==
+
 "@babel/code-frame@^7.0.0", "@babel/code-frame@^7.10.4", "@babel/code-frame@^7.18.6":
   version "7.18.6"
   resolved "https://registry.yarnpkg.com/@babel/code-frame/-/code-frame-7.18.6.tgz#3b25d38c89600baa2dcc219edfa88a74eb2c427a"
@@ -905,6 +910,13 @@
   dependencies:
     regenerator-runtime "^0.13.10"
 
+"@babel/runtime@^7.12.5":
+  version "7.20.1"
+  resolved "https://registry.yarnpkg.com/@babel/runtime/-/runtime-7.20.1.tgz#1148bb33ab252b165a06698fde7576092a78b4a9"
+  integrity sha512-mrzLkl6U9YLF8qpqI7TB82PESyEGjm/0Ly91jG575eVxMMlb8fYfOXFZIJ8XfLrJZQbm7dlKry2bJmXBUEkdFg==
+  dependencies:
+    regenerator-runtime "^0.13.10"
+
 "@babel/template@^7.0.0", "@babel/template@^7.18.10":
   version "7.18.10"
   resolved "https://registry.yarnpkg.com/@babel/template/-/template-7.18.10.tgz#6f9134835970d1dbf0835c0d100c9f38de0c5e71"
@@ -2179,6 +2191,23 @@ buntis@0.2.1:
   resolved "https://registry.yarnpkg.com/buntis/-/buntis-0.2.1.tgz#a043aabc7d64f2243bfaa53e34e999c2dd790e82"
   integrity sha512-5wszfQlsqJmZrfxpPkO5yQcEoBAmfUYlXxXU/IM6PhPZ8DMnMMJQ9rvAHfe5WZmnB6E1IoJYylFfTaf1e2FJbQ==
 
+butterchurn-presets@^3.0.0-beta.4:
+  version "3.0.0-beta.4"
+  resolved "https://registry.yarnpkg.com/butterchurn-presets/-/butterchurn-presets-3.0.0-beta.4.tgz#393d3f7863d546bdef2c52aec90da76bdbcacd3b"
+  integrity sha512-TbQLUPvGOYMZAtWKoCmBtludh9aQZ6NaMGQU4lvPeadBPy3Du3yNmwBjlTMLP5c5mRWElxQPjTL1PtR7FZK3OQ==
+  dependencies:
+    "@babel/runtime" "^7.12.5"
+
+butterchurn@^3.0.0-beta.4:
+  version "3.0.0-beta.4"
+  resolved "https://registry.yarnpkg.com/butterchurn/-/butterchurn-3.0.0-beta.4.tgz#f459d8b81decd4f28f4c90b5c0fc40611ad3d86f"
+  integrity sha512-hiY1ktHYHQ8MT65nnZi7GjrgZZ6sl/ipT5rBqEfaYJd90L4SvOtB6lVxtKadtzAyJo2TQJc4gJfEca4cpZo0DA==
+  dependencies:
+    "@assemblyscript/loader" "^0.17.11"
+    "@babel/runtime" "^7.11.2"
+    ecma-proposal-math-extensions "0.0.2"
+    eel-wasm "^0.0.15"
+
 c8@^7.12.0:
   version "7.12.0"
   resolved "https://registry.yarnpkg.com/c8/-/c8-7.12.0.tgz#402db1c1af4af5249153535d1c84ad70c5c96b14"
@@ -2641,6 +2670,16 @@ easygettext@2.17.0:
     "@vue/compiler-sfc" "^3.0.0"
     pug "^3.0.2"
 
+ecma-proposal-math-extensions@0.0.2:
+  version "0.0.2"
+  resolved "https://registry.yarnpkg.com/ecma-proposal-math-extensions/-/ecma-proposal-math-extensions-0.0.2.tgz#a6a3d64819db70cee0d2e1976b6315d00e4714a0"
+  integrity sha512-80BnDp2Fn7RxXlEr5HHZblniY4aQ97MOAicdWWpSo0vkQiISSE9wLR4SqxKsu4gCtXFBIPPzy8JMhay4NWRg/Q==
+
+eel-wasm@^0.0.15:
+  version "0.0.15"
+  resolved "https://registry.yarnpkg.com/eel-wasm/-/eel-wasm-0.0.15.tgz#d7767081e16591ca02a223c2a62cc84d304021c5"
+  integrity sha512-FSTWf6lwGn7Zc3QiV+KxWTznIqq4j9eST/aXmyN/cC39+1Arqs13YOMosHQ7tqUt+OjQmG79Vd41f9gu+w1lvA==
+
 ejs@^3.1.6:
   version "3.1.8"
   resolved "https://registry.yarnpkg.com/ejs/-/ejs-3.1.8.tgz#758d32910c78047585c7ef1f92f9ee041c1c190b"