feat: Implement disc numbers when viewing an album (#1845)

resources/assets/js/components/song/SongList.vue

@@ -85,7 +85,7 @@
 
     <VirtualScroller
       v-slot="{ item }: { item: PlayableRow }"
-      :item-height="64"
+      :item-height="calculatedItemHeight"
       :items="rows"
       @scroll="onScroll"
       @scrolled-to-end="$emit('scrolledToEnd')"
@@ -94,6 +94,7 @@
         :key="item.playable.id"
         :item="item"
         draggable="true"
+        :show-disc="showDiscLabel(item.playable)"
         @click="onClick(item, $event)"
         @dragleave="onDragLeave"
         @dragstart="onDragStart(item, $event)"
@@ -375,6 +376,50 @@ const onPlay = async (playable: Playable) => {
   await playbackService.play(playable)
 }
 
+const discIndexMap = computed(() => {
+  const map: { [key: number]: number } = {}
+  rows.value.forEach((row, index) => {
+    const { disc } = row.playable
+    if (!Object.values(map).includes(disc)) {
+      map[index] = disc
+    }
+  })
+
+  return map
+})
+
+const noOrOneDiscOnly = computed(() => Object.keys(discIndexMap.value).length <= 1)
+const sortingByTrack = computed(() => sortField.value === 'track')
+const inAlbumContext = computed(() => context.type === 'Album')
+
+const noDiscLabel = computed(() => noOrOneDiscOnly.value || !sortingByTrack.value || !inAlbumContext.value)
+
+const showDiscLabel = (row: Playable) => {
+  if (noDiscLabel.value) {
+    return false
+  }
+
+  const index = findIndex(rows.value, ({ playable }) => playable.id === row.id)
+  return discIndexMap.value[index] !== undefined
+}
+
+const standardSongItemHeight = 64
+const discNumberHeight = 32.5
+
+const calculatedItemHeight = computed(() => {
+  if (noDiscLabel.value) {
+    return standardSongItemHeight
+  }
+
+  const discCount = Object.keys(discIndexMap.value).length
+  const totalAdditionalPixels = discCount * discNumberHeight
+
+  const totalHeight = (rows.value.length * standardSongItemHeight) + totalAdditionalPixels
+  const averageHeight = totalHeight / rows.value.length
+
+  return averageHeight
+})
+
 defineExpose({
   getAllPlayablesWithSort,
 })

resources/assets/js/components/song/SongListItem.spec.ts

@@ -29,9 +29,20 @@ new class extends UnitTestCase {
       await this.user.dblClick(screen.getByTestId('song-item'))
       expect(emitted().play).toBeTruthy()
     })
+
+    it('renders disc info when showDisc is true', async () => {
+      const song = factory('song', {
+        disc: 2,
+        title: 'Test Song',
+      })
+
+      const showDisc = true
+      const { getByText } = this.renderComponent(song, showDisc)
+      expect(getByText('DISC 2')).toBeTruthy()
+    })
   }
 
-  private renderComponent (playable?: Playable) {
+  private renderComponent (playable?: Playable, showDisc = false) {
     playable = playable ?? factory('song')
 
     row = {
@@ -42,6 +53,7 @@ new class extends UnitTestCase {
     return this.render(SongListItem, {
       props: {
         item: row,
+        showDisc,
       },
     })
   }

resources/assets/js/components/song/SongListItem.vue

@@ -1,4 +1,12 @@
 <template>
+  <div>
+    <h4
+      v-if="showDisc && item.playable.disc"
+      class="title text-k-text-primary !flex gap-2 p-2"
+    >
+      DISC {{ item.playable.disc }}
+    </h4>
+
     <article
       :class="{ playing, external, selected: item.selected }"
       class="song-item group text-k-text-secondary border-b border-k-border !max-w-full h-[64px] flex
@@ -39,11 +47,12 @@
         <LikeButton :playable="playable" />
       </span>
     </article>
+  </div>
 </template>
 
 <script lang="ts" setup>
 import { faPodcast } from '@fortawesome/free-solid-svg-icons'
-import { computed, toRefs } from 'vue'
+import { computed, toRefs, withDefaults } from 'vue'
 import { getPlayableProp, isSong, requireInjection, secondsToHis } from '@/utils'
 import { useAuthorization, useKoelPlus } from '@/composables'
 import { PlayableListConfigKey } from '@/symbols'
@@ -54,7 +63,9 @@ import SongThumbnail from '@/components/song/SongThumbnail.vue'
 import UserAvatar from '@/components/user/UserAvatar.vue'
 import ExternalMark from '@/components/ui/ExternalMark.vue'
 
-const props = defineProps<{ item: PlayableRow }>()
+const props = withDefaults(defineProps<{ item: PlayableRow, showDisc: boolean }>(), {
+  showDisc: false,
+})
 
 const emit = defineEmits<{ (e: 'play', playable: Playable): void }>()
 

resources/assets/js/components/song/__snapshots__/SongListItem.spec.ts.snap

@@ -1,7 +1,10 @@
 // Vitest Snapshot v1
 
 exports[`renders 1`] = `
+<div data-v-9a89d9b9="">
+  <!--v-if-->
   <article data-v-9a89d9b9="" class="playing song-item group text-k-text-secondary border-b border-k-border !max-w-full h-[64px] flex items-center transition-[background-color,_box-shadow] ease-in-out duration-200 focus:rounded-md focus focus-within:rounded-md focus:ring-inset focus:ring-1 focus:!ring-k-accent focus-within:ring-inset focus-within:ring-1 focus-within:!ring-k-accent hover:bg-white/5 hover:ring-inset hover:ring-1 hover:ring-white/10 hover:rounded-md" data-testid="song-item" tabindex="0"><span data-v-9a89d9b9="" class="track-number"><i data-v-47e95701="" data-v-9a89d9b9="" class="relative flex gap-1 content-between w-[13px] aspect-square"><span data-v-47e95701=""></span><span data-v-47e95701=""></span><span data-v-47e95701=""></span></i></span><span data-v-9a89d9b9="" class="thumbnail leading-none"><button data-v-9a89d9b9="" style="background-image: url(undefined/resources/assets/img/covers/default.svg);" title="Pause" class="song-thumbnail w-[48px] aspect-square bg-cover relative rounded overflow-hidden active:scale-95"><img alt="Cover image" src="https://example.com/cover.jpg" class="w-full aspect-square object-cover" loading="lazy"><span class="absolute top-0 left-0 w-full h-full group-hover:bg-black/40 no-hover:bg-black/40 z-10"></span><span class="absolute flex opacity-0 no-hover:opacity-100 items-center justify-center w-[24px] aspect-square rounded-full top-1/2 left-1/2 -translate-x-1/2 -translate-y-1/2 bg-k-highlight group-hover:opacity-100 duration-500 transition z-20"><br data-testid="Icon" icon="[object Object]" class="text-white"></span></button></span><span data-v-9a89d9b9="" class="title-artist flex flex-col gap-2 overflow-hidden"><span data-v-9a89d9b9="" class="title text-k-text-primary !flex gap-2 items-center"><!--v-if--> Test Song</span><span data-v-9a89d9b9="" class="artist">Test Artist</span></span><span data-v-9a89d9b9="" class="album">Test Album</span>
     <!--v-if--><span data-v-9a89d9b9="" class="time">16:40</span><span data-v-9a89d9b9="" class="extra"><button data-v-9a89d9b9="" class="transition-[color] duration-200 ease-in-out text-k-text-secondary hover:text-k-text-primary" type="button" title="Unlike"><br data-testid="Icon" icon="[object Object]"></button></span>
   </article>
+</div>
 `;